diff options
Diffstat (limited to 'vendor/image/src/codecs')
44 files changed, 0 insertions, 20828 deletions
diff --git a/vendor/image/src/codecs/avif/decoder.rs b/vendor/image/src/codecs/avif/decoder.rs deleted file mode 100644 index acba4f8..0000000 --- a/vendor/image/src/codecs/avif/decoder.rs +++ /dev/null @@ -1,177 +0,0 @@ -//! Decoding of AVIF images. -/// -/// The [AVIF] specification defines an image derivative of the AV1 bitstream, an open video codec. -/// -/// [AVIF]: https://aomediacodec.github.io/av1-avif/ -use std::convert::TryFrom; -use std::error::Error; -use std::io::{self, Cursor, Read}; -use std::marker::PhantomData; -use std::mem; - -use crate::error::DecodingError; -use crate::{ColorType, ImageDecoder, ImageError, ImageFormat, ImageResult}; - -use dav1d::{PixelLayout, PlanarImageComponent}; -use dcv_color_primitives as dcp; -use mp4parse::{read_avif, ParseStrictness}; - -fn error_map<E: Into<Box<dyn Error + Send + Sync>>>(err: E) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::Avif.into(), err)) -} - -/// AVIF Decoder. -/// -/// Reads one image into the chosen input. -pub struct AvifDecoder<R> { - inner: PhantomData<R>, - picture: dav1d::Picture, - alpha_picture: Option<dav1d::Picture>, - icc_profile: Option<Vec<u8>>, -} - -impl<R: Read> AvifDecoder<R> { - /// Create a new decoder that reads its input from `r`. - pub fn new(mut r: R) -> ImageResult<Self> { - let ctx = read_avif(&mut r, ParseStrictness::Normal).map_err(error_map)?; - let coded = ctx.primary_item_coded_data().unwrap_or_default(); - - let mut primary_decoder = dav1d::Decoder::new(); - primary_decoder - .send_data(coded, None, None, None) - .map_err(error_map)?; - let picture = primary_decoder.get_picture().map_err(error_map)?; - let alpha_item = ctx.alpha_item_coded_data().unwrap_or_default(); - let alpha_picture = if !alpha_item.is_empty() { - let mut alpha_decoder = dav1d::Decoder::new(); - alpha_decoder - .send_data(alpha_item, None, None, None) - .map_err(error_map)?; - Some(alpha_decoder.get_picture().map_err(error_map)?) - } else { - None - }; - let icc_profile = ctx - .icc_colour_information() - .map(|x| x.ok().unwrap_or_default()) - .map(|x| x.to_vec()); - - assert_eq!(picture.bit_depth(), 8); - Ok(AvifDecoder { - inner: PhantomData, - picture, - alpha_picture, - icc_profile, - }) - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct AvifReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for AvifReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for AvifDecoder<R> { - type Reader = AvifReader<R>; - - fn dimensions(&self) -> (u32, u32) { - (self.picture.width(), self.picture.height()) - } - - fn color_type(&self) -> ColorType { - ColorType::Rgba8 - } - - fn icc_profile(&mut self) -> Option<Vec<u8>> { - self.icc_profile.clone() - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - let plane = self.picture.plane(PlanarImageComponent::Y); - Ok(AvifReader( - Cursor::new(plane.as_ref().to_vec()), - PhantomData, - )) - } - - fn read_image(self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - - dcp::initialize(); - - if self.picture.pixel_layout() != PixelLayout::I400 { - let pixel_format = match self.picture.pixel_layout() { - PixelLayout::I400 => todo!(), - PixelLayout::I420 => dcp::PixelFormat::I420, - PixelLayout::I422 => dcp::PixelFormat::I422, - PixelLayout::I444 => dcp::PixelFormat::I444, - PixelLayout::Unknown => panic!("Unknown pixel layout"), - }; - let src_format = dcp::ImageFormat { - pixel_format, - color_space: dcp::ColorSpace::Bt601, - num_planes: 3, - }; - let dst_format = dcp::ImageFormat { - pixel_format: dcp::PixelFormat::Rgba, - color_space: dcp::ColorSpace::Lrgb, - num_planes: 1, - }; - let (width, height) = self.dimensions(); - let planes = &[ - self.picture.plane(PlanarImageComponent::Y), - self.picture.plane(PlanarImageComponent::U), - self.picture.plane(PlanarImageComponent::V), - ]; - let src_buffers = planes.iter().map(AsRef::as_ref).collect::<Vec<_>>(); - let strides = &[ - self.picture.stride(PlanarImageComponent::Y) as usize, - self.picture.stride(PlanarImageComponent::U) as usize, - self.picture.stride(PlanarImageComponent::V) as usize, - ]; - let dst_buffers = &mut [&mut buf[..]]; - dcp::convert_image( - width, - height, - &src_format, - Some(strides), - &src_buffers, - &dst_format, - None, - dst_buffers, - ) - .map_err(error_map)?; - } else { - let plane = self.picture.plane(PlanarImageComponent::Y); - buf.copy_from_slice(plane.as_ref()); - } - - if let Some(picture) = self.alpha_picture { - assert_eq!(picture.pixel_layout(), PixelLayout::I400); - let stride = picture.stride(PlanarImageComponent::Y) as usize; - let plane = picture.plane(PlanarImageComponent::Y); - let width = picture.width(); - for (buf, slice) in Iterator::zip( - buf.chunks_exact_mut(width as usize * 4), - plane.as_ref().chunks_exact(stride), - ) { - for i in 0..width as usize { - buf[3 + i * 4] = slice[i]; - } - } - } - - Ok(()) - } -} diff --git a/vendor/image/src/codecs/avif/encoder.rs b/vendor/image/src/codecs/avif/encoder.rs deleted file mode 100644 index 7484ff1..0000000 --- a/vendor/image/src/codecs/avif/encoder.rs +++ /dev/null @@ -1,274 +0,0 @@ -//! Encoding of AVIF images. -/// -/// The [AVIF] specification defines an image derivative of the AV1 bitstream, an open video codec. -/// -/// [AVIF]: https://aomediacodec.github.io/av1-avif/ -use std::borrow::Cow; -use std::cmp::min; -use std::io::Write; - -use crate::buffer::ConvertBuffer; -use crate::color::{FromColor, Luma, LumaA, Rgb, Rgba}; -use crate::error::{ - EncodingError, ParameterError, ParameterErrorKind, UnsupportedError, UnsupportedErrorKind, -}; -use crate::{ColorType, ImageBuffer, ImageEncoder, ImageFormat, Pixel}; -use crate::{ImageError, ImageResult}; - -use bytemuck::{try_cast_slice, try_cast_slice_mut, Pod, PodCastError}; -use num_traits::Zero; -use ravif::{Encoder, Img, RGB8, RGBA8}; -use rgb::AsPixels; - -/// AVIF Encoder. -/// -/// Writes one image into the chosen output. -pub struct AvifEncoder<W> { - inner: W, - encoder: Encoder, -} - -/// An enumeration over supported AVIF color spaces -#[derive(Debug, Copy, Clone, PartialEq, Eq)] -#[non_exhaustive] -pub enum ColorSpace { - /// sRGB colorspace - Srgb, - /// BT.709 colorspace - Bt709, -} - -impl ColorSpace { - fn to_ravif(self) -> ravif::ColorSpace { - match self { - Self::Srgb => ravif::ColorSpace::RGB, - Self::Bt709 => ravif::ColorSpace::YCbCr, - } - } -} - -enum RgbColor<'buf> { - Rgb8(Img<&'buf [RGB8]>), - Rgba8(Img<&'buf [RGBA8]>), -} - -impl<W: Write> AvifEncoder<W> { - /// Create a new encoder that writes its output to `w`. - pub fn new(w: W) -> Self { - AvifEncoder::new_with_speed_quality(w, 4, 80) // `cavif` uses these defaults - } - - /// Create a new encoder with specified speed and quality, that writes its output to `w`. - /// `speed` accepts a value in the range 0-10, where 0 is the slowest and 10 is the fastest. - /// `quality` accepts a value in the range 0-100, where 0 is the worst and 100 is the best. - pub fn new_with_speed_quality(w: W, speed: u8, quality: u8) -> Self { - // Clamp quality and speed to range - let quality = min(quality, 100); - let speed = min(speed, 10); - - let encoder = Encoder::new() - .with_quality(f32::from(quality)) - .with_alpha_quality(f32::from(quality)) - .with_speed(speed); - - AvifEncoder { inner: w, encoder } - } - - /// Encode with the specified `color_space`. - pub fn with_colorspace(mut self, color_space: ColorSpace) -> Self { - self.encoder = self - .encoder - .with_internal_color_space(color_space.to_ravif()); - self - } - - /// Configures `rayon` thread pool size. - /// The default `None` is to use all threads in the default `rayon` thread pool. - pub fn with_num_threads(mut self, num_threads: Option<usize>) -> Self { - self.encoder = self.encoder.with_num_threads(num_threads); - self - } -} - -impl<W: Write> ImageEncoder for AvifEncoder<W> { - /// Encode image data with the indicated color type. - /// - /// The encoder currently requires all data to be RGBA8, it will be converted internally if - /// necessary. When data is suitably aligned, i.e. u16 channels to two bytes, then the - /// conversion may be more efficient. - fn write_image( - mut self, - data: &[u8], - width: u32, - height: u32, - color: ColorType, - ) -> ImageResult<()> { - self.set_color(color); - // `ravif` needs strongly typed data so let's convert. We can either use a temporarily - // owned version in our own buffer or zero-copy if possible by using the input buffer. - // This requires going through `rgb`. - let mut fallback = vec![]; // This vector is used if we need to do a color conversion. - let result = match Self::encode_as_img(&mut fallback, data, width, height, color)? { - RgbColor::Rgb8(buffer) => self.encoder.encode_rgb(buffer), - RgbColor::Rgba8(buffer) => self.encoder.encode_rgba(buffer), - }; - let data = result.map_err(|err| { - ImageError::Encoding(EncodingError::new(ImageFormat::Avif.into(), err)) - })?; - self.inner.write_all(&data.avif_file)?; - Ok(()) - } -} - -impl<W: Write> AvifEncoder<W> { - // Does not currently do anything. Mirrors behaviour of old config function. - fn set_color(&mut self, _color: ColorType) { - // self.config.color_space = ColorSpace::RGB; - } - - fn encode_as_img<'buf>( - fallback: &'buf mut Vec<u8>, - data: &'buf [u8], - width: u32, - height: u32, - color: ColorType, - ) -> ImageResult<RgbColor<'buf>> { - // Error wrapping utility for color dependent buffer dimensions. - fn try_from_raw<P: Pixel + 'static>( - data: &[P::Subpixel], - width: u32, - height: u32, - ) -> ImageResult<ImageBuffer<P, &[P::Subpixel]>> { - ImageBuffer::from_raw(width, height, data).ok_or_else(|| { - ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - )) - }) - } - - // Convert to target color type using few buffer allocations. - fn convert_into<'buf, P>( - buf: &'buf mut Vec<u8>, - image: ImageBuffer<P, &[P::Subpixel]>, - ) -> Img<&'buf [RGBA8]> - where - P: Pixel + 'static, - Rgba<u8>: FromColor<P>, - { - let (width, height) = image.dimensions(); - // TODO: conversion re-using the target buffer? - let image: ImageBuffer<Rgba<u8>, _> = image.convert(); - *buf = image.into_raw(); - Img::new(buf.as_pixels(), width as usize, height as usize) - } - - // Cast the input slice using few buffer allocations if possible. - // In particular try not to allocate if the caller did the infallible reverse. - fn cast_buffer<Channel>(buf: &[u8]) -> ImageResult<Cow<[Channel]>> - where - Channel: Pod + Zero, - { - match try_cast_slice(buf) { - Ok(slice) => Ok(Cow::Borrowed(slice)), - Err(PodCastError::OutputSliceWouldHaveSlop) => Err(ImageError::Parameter( - ParameterError::from_kind(ParameterErrorKind::DimensionMismatch), - )), - Err(PodCastError::TargetAlignmentGreaterAndInputNotAligned) => { - // Sad, but let's allocate. - // bytemuck checks alignment _before_ slop but size mismatch before this.. - if buf.len() % std::mem::size_of::<Channel>() != 0 { - Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))) - } else { - let len = buf.len() / std::mem::size_of::<Channel>(); - let mut data = vec![Channel::zero(); len]; - let view = try_cast_slice_mut::<_, u8>(data.as_mut_slice()).unwrap(); - view.copy_from_slice(buf); - Ok(Cow::Owned(data)) - } - } - Err(err) => { - // Are you trying to encode a ZST?? - Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic(format!("{:?}", err)), - ))) - } - } - } - - match color { - ColorType::Rgb8 => { - // ravif doesn't do any checks but has some asserts, so we do the checks. - let img = try_from_raw::<Rgb<u8>>(data, width, height)?; - // Now, internally ravif uses u32 but it takes usize. We could do some checked - // conversion but instead we use that a non-empty image must be addressable. - if img.pixels().len() == 0 { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))); - } - - Ok(RgbColor::Rgb8(Img::new( - rgb::AsPixels::as_pixels(data), - width as usize, - height as usize, - ))) - } - ColorType::Rgba8 => { - // ravif doesn't do any checks but has some asserts, so we do the checks. - let img = try_from_raw::<Rgba<u8>>(data, width, height)?; - // Now, internally ravif uses u32 but it takes usize. We could do some checked - // conversion but instead we use that a non-empty image must be addressable. - if img.pixels().len() == 0 { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))); - } - - Ok(RgbColor::Rgba8(Img::new( - rgb::AsPixels::as_pixels(data), - width as usize, - height as usize, - ))) - } - // we need a separate buffer.. - ColorType::L8 => { - let image = try_from_raw::<Luma<u8>>(data, width, height)?; - Ok(RgbColor::Rgba8(convert_into(fallback, image))) - } - ColorType::La8 => { - let image = try_from_raw::<LumaA<u8>>(data, width, height)?; - Ok(RgbColor::Rgba8(convert_into(fallback, image))) - } - // we need to really convert data.. - ColorType::L16 => { - let buffer = cast_buffer(data)?; - let image = try_from_raw::<Luma<u16>>(&buffer, width, height)?; - Ok(RgbColor::Rgba8(convert_into(fallback, image))) - } - ColorType::La16 => { - let buffer = cast_buffer(data)?; - let image = try_from_raw::<LumaA<u16>>(&buffer, width, height)?; - Ok(RgbColor::Rgba8(convert_into(fallback, image))) - } - ColorType::Rgb16 => { - let buffer = cast_buffer(data)?; - let image = try_from_raw::<Rgb<u16>>(&buffer, width, height)?; - Ok(RgbColor::Rgba8(convert_into(fallback, image))) - } - ColorType::Rgba16 => { - let buffer = cast_buffer(data)?; - let image = try_from_raw::<Rgba<u16>>(&buffer, width, height)?; - Ok(RgbColor::Rgba8(convert_into(fallback, image))) - } - // for cases we do not support at all? - _ => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Avif.into(), - UnsupportedErrorKind::Color(color.into()), - ), - )), - } - } -} diff --git a/vendor/image/src/codecs/avif/mod.rs b/vendor/image/src/codecs/avif/mod.rs deleted file mode 100644 index f74217c..0000000 --- a/vendor/image/src/codecs/avif/mod.rs +++ /dev/null @@ -1,14 +0,0 @@ -//! Encoding of AVIF images. -/// -/// The [AVIF] specification defines an image derivative of the AV1 bitstream, an open video codec. -/// -/// [AVIF]: https://aomediacodec.github.io/av1-avif/ -#[cfg(feature = "avif-decoder")] -pub use self::decoder::AvifDecoder; -#[cfg(feature = "avif-encoder")] -pub use self::encoder::{AvifEncoder, ColorSpace}; - -#[cfg(feature = "avif-decoder")] -mod decoder; -#[cfg(feature = "avif-encoder")] -mod encoder; diff --git a/vendor/image/src/codecs/bmp/decoder.rs b/vendor/image/src/codecs/bmp/decoder.rs deleted file mode 100644 index 58c0650..0000000 --- a/vendor/image/src/codecs/bmp/decoder.rs +++ /dev/null @@ -1,1483 +0,0 @@ -use std::cmp::{self, Ordering}; -use std::convert::TryFrom; -use std::io::{self, Cursor, Read, Seek, SeekFrom}; -use std::iter::{repeat, Iterator, Rev}; -use std::marker::PhantomData; -use std::slice::ChunksMut; -use std::{error, fmt, mem}; - -use byteorder::{LittleEndian, ReadBytesExt}; - -use crate::color::ColorType; -use crate::error::{ - DecodingError, ImageError, ImageResult, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{self, ImageDecoder, ImageDecoderRect, ImageFormat, Progress}; - -const BITMAPCOREHEADER_SIZE: u32 = 12; -const BITMAPINFOHEADER_SIZE: u32 = 40; -const BITMAPV2HEADER_SIZE: u32 = 52; -const BITMAPV3HEADER_SIZE: u32 = 56; -const BITMAPV4HEADER_SIZE: u32 = 108; -const BITMAPV5HEADER_SIZE: u32 = 124; - -static LOOKUP_TABLE_3_BIT_TO_8_BIT: [u8; 8] = [0, 36, 73, 109, 146, 182, 219, 255]; -static LOOKUP_TABLE_4_BIT_TO_8_BIT: [u8; 16] = [ - 0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255, -]; -static LOOKUP_TABLE_5_BIT_TO_8_BIT: [u8; 32] = [ - 0, 8, 16, 25, 33, 41, 49, 58, 66, 74, 82, 90, 99, 107, 115, 123, 132, 140, 148, 156, 165, 173, - 181, 189, 197, 206, 214, 222, 230, 239, 247, 255, -]; -static LOOKUP_TABLE_6_BIT_TO_8_BIT: [u8; 64] = [ - 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 45, 49, 53, 57, 61, 65, 69, 73, 77, 81, 85, 89, 93, - 97, 101, 105, 109, 113, 117, 121, 125, 130, 134, 138, 142, 146, 150, 154, 158, 162, 166, 170, - 174, 178, 182, 186, 190, 194, 198, 202, 206, 210, 215, 219, 223, 227, 231, 235, 239, 243, 247, - 251, 255, -]; - -static R5_G5_B5_COLOR_MASK: Bitfields = Bitfields { - r: Bitfield { len: 5, shift: 10 }, - g: Bitfield { len: 5, shift: 5 }, - b: Bitfield { len: 5, shift: 0 }, - a: Bitfield { len: 0, shift: 0 }, -}; -const R8_G8_B8_COLOR_MASK: Bitfields = Bitfields { - r: Bitfield { len: 8, shift: 24 }, - g: Bitfield { len: 8, shift: 16 }, - b: Bitfield { len: 8, shift: 8 }, - a: Bitfield { len: 0, shift: 0 }, -}; -const R8_G8_B8_A8_COLOR_MASK: Bitfields = Bitfields { - r: Bitfield { len: 8, shift: 16 }, - g: Bitfield { len: 8, shift: 8 }, - b: Bitfield { len: 8, shift: 0 }, - a: Bitfield { len: 8, shift: 24 }, -}; - -const RLE_ESCAPE: u8 = 0; -const RLE_ESCAPE_EOL: u8 = 0; -const RLE_ESCAPE_EOF: u8 = 1; -const RLE_ESCAPE_DELTA: u8 = 2; - -/// The maximum width/height the decoder will process. -const MAX_WIDTH_HEIGHT: i32 = 0xFFFF; - -#[derive(PartialEq, Copy, Clone)] -enum ImageType { - Palette, - RGB16, - RGB24, - RGB32, - RGBA32, - RLE8, - RLE4, - Bitfields16, - Bitfields32, -} - -#[derive(PartialEq)] -enum BMPHeaderType { - Core, - Info, - V2, - V3, - V4, - V5, -} - -#[derive(PartialEq)] -enum FormatFullBytes { - RGB24, - RGB32, - RGBA32, - Format888, -} - -enum Chunker<'a> { - FromTop(ChunksMut<'a, u8>), - FromBottom(Rev<ChunksMut<'a, u8>>), -} - -pub(crate) struct RowIterator<'a> { - chunks: Chunker<'a>, -} - -impl<'a> Iterator for RowIterator<'a> { - type Item = &'a mut [u8]; - - #[inline(always)] - fn next(&mut self) -> Option<&'a mut [u8]> { - match self.chunks { - Chunker::FromTop(ref mut chunks) => chunks.next(), - Chunker::FromBottom(ref mut chunks) => chunks.next(), - } - } -} - -/// All errors that can occur when attempting to parse a BMP -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum DecoderError { - // Failed to decompress RLE data. - CorruptRleData, - - /// The bitfield mask interleaves set and unset bits - BitfieldMaskNonContiguous, - /// Bitfield mask invalid (e.g. too long for specified type) - BitfieldMaskInvalid, - /// Bitfield (of the specified width – 16- or 32-bit) mask not present - BitfieldMaskMissing(u32), - /// Bitfield (of the specified width – 16- or 32-bit) masks not present - BitfieldMasksMissing(u32), - - /// BMP's "BM" signature wrong or missing - BmpSignatureInvalid, - /// More than the exactly one allowed plane specified by the format - MoreThanOnePlane, - /// Invalid amount of bits per channel for the specified image type - InvalidChannelWidth(ChannelWidthError, u16), - - /// The width is negative - NegativeWidth(i32), - /// One of the dimensions is larger than a soft limit - ImageTooLarge(i32, i32), - /// The height is `i32::min_value()` - /// - /// General negative heights specify top-down DIBs - InvalidHeight, - - /// Specified image type is invalid for top-down BMPs (i.e. is compressed) - ImageTypeInvalidForTopDown(u32), - /// Image type not currently recognized by the decoder - ImageTypeUnknown(u32), - - /// Bitmap header smaller than the core header - HeaderTooSmall(u32), - - /// The palette is bigger than allowed by the bit count of the BMP - PaletteSizeExceeded { - colors_used: u32, - bit_count: u16, - }, -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::CorruptRleData => f.write_str("Corrupt RLE data"), - DecoderError::BitfieldMaskNonContiguous => f.write_str("Non-contiguous bitfield mask"), - DecoderError::BitfieldMaskInvalid => f.write_str("Invalid bitfield mask"), - DecoderError::BitfieldMaskMissing(bb) => { - f.write_fmt(format_args!("Missing {}-bit bitfield mask", bb)) - } - DecoderError::BitfieldMasksMissing(bb) => { - f.write_fmt(format_args!("Missing {}-bit bitfield masks", bb)) - } - DecoderError::BmpSignatureInvalid => f.write_str("BMP signature not found"), - DecoderError::MoreThanOnePlane => f.write_str("More than one plane"), - DecoderError::InvalidChannelWidth(tp, n) => { - f.write_fmt(format_args!("Invalid channel bit count for {}: {}", tp, n)) - } - DecoderError::NegativeWidth(w) => f.write_fmt(format_args!("Negative width ({})", w)), - DecoderError::ImageTooLarge(w, h) => f.write_fmt(format_args!( - "Image too large (one of ({}, {}) > soft limit of {})", - w, h, MAX_WIDTH_HEIGHT - )), - DecoderError::InvalidHeight => f.write_str("Invalid height"), - DecoderError::ImageTypeInvalidForTopDown(tp) => f.write_fmt(format_args!( - "Invalid image type {} for top-down image.", - tp - )), - DecoderError::ImageTypeUnknown(tp) => { - f.write_fmt(format_args!("Unknown image compression type {}", tp)) - } - DecoderError::HeaderTooSmall(s) => { - f.write_fmt(format_args!("Bitmap header too small ({} bytes)", s)) - } - DecoderError::PaletteSizeExceeded { - colors_used, - bit_count, - } => f.write_fmt(format_args!( - "Palette size {} exceeds maximum size for BMP with bit count of {}", - colors_used, bit_count - )), - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::Bmp.into(), e)) - } -} - -impl error::Error for DecoderError {} - -/// Distinct image types whose saved channel width can be invalid -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum ChannelWidthError { - /// RGB - Rgb, - /// 8-bit run length encoding - Rle8, - /// 4-bit run length encoding - Rle4, - /// Bitfields (16- or 32-bit) - Bitfields, -} - -impl fmt::Display for ChannelWidthError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str(match self { - ChannelWidthError::Rgb => "RGB", - ChannelWidthError::Rle8 => "RLE8", - ChannelWidthError::Rle4 => "RLE4", - ChannelWidthError::Bitfields => "bitfields", - }) - } -} - -/// Convenience function to check if the combination of width, length and number of -/// channels would result in a buffer that would overflow. -fn check_for_overflow(width: i32, length: i32, channels: usize) -> ImageResult<()> { - num_bytes(width, length, channels) - .map(|_| ()) - .ok_or_else(|| { - ImageError::Unsupported(UnsupportedError::from_format_and_kind( - ImageFormat::Bmp.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Image dimensions ({}x{} w/{} channels) are too large", - width, length, channels - )), - )) - }) -} - -/// Calculate how many many bytes a buffer holding a decoded image with these properties would -/// require. Returns `None` if the buffer size would overflow or if one of the sizes are negative. -fn num_bytes(width: i32, length: i32, channels: usize) -> Option<usize> { - if width <= 0 || length <= 0 { - None - } else { - match channels.checked_mul(width as usize) { - Some(n) => n.checked_mul(length as usize), - None => None, - } - } -} - -/// Call the provided function on each row of the provided buffer, returning Err if the provided -/// function returns an error, extends the buffer if it's not large enough. -fn with_rows<F>( - buffer: &mut [u8], - width: i32, - height: i32, - channels: usize, - top_down: bool, - mut func: F, -) -> io::Result<()> -where - F: FnMut(&mut [u8]) -> io::Result<()>, -{ - // An overflow should already have been checked for when this is called, - // though we check anyhow, as it somehow seems to increase performance slightly. - let row_width = channels.checked_mul(width as usize).unwrap(); - let full_image_size = row_width.checked_mul(height as usize).unwrap(); - assert_eq!(buffer.len(), full_image_size); - - if !top_down { - for row in buffer.chunks_mut(row_width).rev() { - func(row)?; - } - } else { - for row in buffer.chunks_mut(row_width) { - func(row)?; - } - } - Ok(()) -} - -fn set_8bit_pixel_run<'a, T: Iterator<Item = &'a u8>>( - pixel_iter: &mut ChunksMut<u8>, - palette: &[[u8; 3]], - indices: T, - n_pixels: usize, -) -> bool { - for idx in indices.take(n_pixels) { - if let Some(pixel) = pixel_iter.next() { - let rgb = palette[*idx as usize]; - pixel[0] = rgb[0]; - pixel[1] = rgb[1]; - pixel[2] = rgb[2]; - } else { - return false; - } - } - true -} - -fn set_4bit_pixel_run<'a, T: Iterator<Item = &'a u8>>( - pixel_iter: &mut ChunksMut<u8>, - palette: &[[u8; 3]], - indices: T, - mut n_pixels: usize, -) -> bool { - for idx in indices { - macro_rules! set_pixel { - ($i:expr) => { - if n_pixels == 0 { - break; - } - if let Some(pixel) = pixel_iter.next() { - let rgb = palette[$i as usize]; - pixel[0] = rgb[0]; - pixel[1] = rgb[1]; - pixel[2] = rgb[2]; - } else { - return false; - } - n_pixels -= 1; - }; - } - set_pixel!(idx >> 4); - set_pixel!(idx & 0xf); - } - true -} - -#[rustfmt::skip] -fn set_2bit_pixel_run<'a, T: Iterator<Item = &'a u8>>( - pixel_iter: &mut ChunksMut<u8>, - palette: &[[u8; 3]], - indices: T, - mut n_pixels: usize, -) -> bool { - for idx in indices { - macro_rules! set_pixel { - ($i:expr) => { - if n_pixels == 0 { - break; - } - if let Some(pixel) = pixel_iter.next() { - let rgb = palette[$i as usize]; - pixel[0] = rgb[0]; - pixel[1] = rgb[1]; - pixel[2] = rgb[2]; - } else { - return false; - } - n_pixels -= 1; - }; - } - set_pixel!((idx >> 6) & 0x3u8); - set_pixel!((idx >> 4) & 0x3u8); - set_pixel!((idx >> 2) & 0x3u8); - set_pixel!( idx & 0x3u8); - } - true -} - -fn set_1bit_pixel_run<'a, T: Iterator<Item = &'a u8>>( - pixel_iter: &mut ChunksMut<u8>, - palette: &[[u8; 3]], - indices: T, -) { - for idx in indices { - let mut bit = 0x80; - loop { - if let Some(pixel) = pixel_iter.next() { - let rgb = palette[((idx & bit) != 0) as usize]; - pixel[0] = rgb[0]; - pixel[1] = rgb[1]; - pixel[2] = rgb[2]; - } else { - return; - } - - bit >>= 1; - if bit == 0 { - break; - } - } - } -} - -#[derive(PartialEq, Eq)] -struct Bitfield { - shift: u32, - len: u32, -} - -impl Bitfield { - fn from_mask(mask: u32, max_len: u32) -> ImageResult<Bitfield> { - if mask == 0 { - return Ok(Bitfield { shift: 0, len: 0 }); - } - let mut shift = mask.trailing_zeros(); - let mut len = (!(mask >> shift)).trailing_zeros(); - if len != mask.count_ones() { - return Err(DecoderError::BitfieldMaskNonContiguous.into()); - } - if len + shift > max_len { - return Err(DecoderError::BitfieldMaskInvalid.into()); - } - if len > 8 { - shift += len - 8; - len = 8; - } - Ok(Bitfield { shift, len }) - } - - fn read(&self, data: u32) -> u8 { - let data = data >> self.shift; - match self.len { - 1 => ((data & 0b1) * 0xff) as u8, - 2 => ((data & 0b11) * 0x55) as u8, - 3 => LOOKUP_TABLE_3_BIT_TO_8_BIT[(data & 0b00_0111) as usize], - 4 => LOOKUP_TABLE_4_BIT_TO_8_BIT[(data & 0b00_1111) as usize], - 5 => LOOKUP_TABLE_5_BIT_TO_8_BIT[(data & 0b01_1111) as usize], - 6 => LOOKUP_TABLE_6_BIT_TO_8_BIT[(data & 0b11_1111) as usize], - 7 => ((data & 0x7f) << 1 | (data & 0x7f) >> 6) as u8, - 8 => (data & 0xff) as u8, - _ => panic!(), - } - } -} - -#[derive(PartialEq, Eq)] -struct Bitfields { - r: Bitfield, - g: Bitfield, - b: Bitfield, - a: Bitfield, -} - -impl Bitfields { - fn from_mask( - r_mask: u32, - g_mask: u32, - b_mask: u32, - a_mask: u32, - max_len: u32, - ) -> ImageResult<Bitfields> { - let bitfields = Bitfields { - r: Bitfield::from_mask(r_mask, max_len)?, - g: Bitfield::from_mask(g_mask, max_len)?, - b: Bitfield::from_mask(b_mask, max_len)?, - a: Bitfield::from_mask(a_mask, max_len)?, - }; - if bitfields.r.len == 0 || bitfields.g.len == 0 || bitfields.b.len == 0 { - return Err(DecoderError::BitfieldMaskMissing(max_len).into()); - } - Ok(bitfields) - } -} - -/// A bmp decoder -pub struct BmpDecoder<R> { - reader: R, - - bmp_header_type: BMPHeaderType, - indexed_color: bool, - - width: i32, - height: i32, - data_offset: u64, - top_down: bool, - no_file_header: bool, - add_alpha_channel: bool, - has_loaded_metadata: bool, - image_type: ImageType, - - bit_count: u16, - colors_used: u32, - palette: Option<Vec<[u8; 3]>>, - bitfields: Option<Bitfields>, -} - -enum RLEInsn { - EndOfFile, - EndOfRow, - Delta(u8, u8), - Absolute(u8, Vec<u8>), - PixelRun(u8, u8), -} - -impl<R: Read + Seek> BmpDecoder<R> { - fn new_decoder(reader: R) -> BmpDecoder<R> { - BmpDecoder { - reader, - - bmp_header_type: BMPHeaderType::Info, - indexed_color: false, - - width: 0, - height: 0, - data_offset: 0, - top_down: false, - no_file_header: false, - add_alpha_channel: false, - has_loaded_metadata: false, - image_type: ImageType::Palette, - - bit_count: 0, - colors_used: 0, - palette: None, - bitfields: None, - } - } - - /// Create a new decoder that decodes from the stream ```r``` - pub fn new(reader: R) -> ImageResult<BmpDecoder<R>> { - let mut decoder = Self::new_decoder(reader); - decoder.read_metadata()?; - Ok(decoder) - } - - /// Create a new decoder that decodes from the stream ```r``` without first - /// reading a BITMAPFILEHEADER. This is useful for decoding the CF_DIB format - /// directly from the Windows clipboard. - pub fn new_without_file_header(reader: R) -> ImageResult<BmpDecoder<R>> { - let mut decoder = Self::new_decoder(reader); - decoder.no_file_header = true; - decoder.read_metadata()?; - Ok(decoder) - } - - #[cfg(feature = "ico")] - pub(crate) fn new_with_ico_format(reader: R) -> ImageResult<BmpDecoder<R>> { - let mut decoder = Self::new_decoder(reader); - decoder.read_metadata_in_ico_format()?; - Ok(decoder) - } - - /// If true, the palette in BMP does not apply to the image even if it is found. - /// In other words, the output image is the indexed color. - pub fn set_indexed_color(&mut self, indexed_color: bool) { - self.indexed_color = indexed_color; - } - - #[cfg(feature = "ico")] - pub(crate) fn reader(&mut self) -> &mut R { - &mut self.reader - } - - fn read_file_header(&mut self) -> ImageResult<()> { - if self.no_file_header { - return Ok(()); - } - let mut signature = [0; 2]; - self.reader.read_exact(&mut signature)?; - - if signature != b"BM"[..] { - return Err(DecoderError::BmpSignatureInvalid.into()); - } - - // The next 8 bytes represent file size, followed the 4 reserved bytes - // We're not interesting these values - self.reader.read_u32::<LittleEndian>()?; - self.reader.read_u32::<LittleEndian>()?; - - self.data_offset = u64::from(self.reader.read_u32::<LittleEndian>()?); - - Ok(()) - } - - /// Read BITMAPCOREHEADER https://msdn.microsoft.com/en-us/library/vs/alm/dd183372(v=vs.85).aspx - /// - /// returns Err if any of the values are invalid. - fn read_bitmap_core_header(&mut self) -> ImageResult<()> { - // As height/width values in BMP files with core headers are only 16 bits long, - // they won't be larger than `MAX_WIDTH_HEIGHT`. - self.width = i32::from(self.reader.read_u16::<LittleEndian>()?); - self.height = i32::from(self.reader.read_u16::<LittleEndian>()?); - - check_for_overflow(self.width, self.height, self.num_channels())?; - - // Number of planes (format specifies that this should be 1). - if self.reader.read_u16::<LittleEndian>()? != 1 { - return Err(DecoderError::MoreThanOnePlane.into()); - } - - self.bit_count = self.reader.read_u16::<LittleEndian>()?; - self.image_type = match self.bit_count { - 1 | 4 | 8 => ImageType::Palette, - 24 => ImageType::RGB24, - _ => { - return Err(DecoderError::InvalidChannelWidth( - ChannelWidthError::Rgb, - self.bit_count, - ) - .into()) - } - }; - - Ok(()) - } - - /// Read BITMAPINFOHEADER https://msdn.microsoft.com/en-us/library/vs/alm/dd183376(v=vs.85).aspx - /// or BITMAPV{2|3|4|5}HEADER. - /// - /// returns Err if any of the values are invalid. - fn read_bitmap_info_header(&mut self) -> ImageResult<()> { - self.width = self.reader.read_i32::<LittleEndian>()?; - self.height = self.reader.read_i32::<LittleEndian>()?; - - // Width can not be negative - if self.width < 0 { - return Err(DecoderError::NegativeWidth(self.width).into()); - } else if self.width > MAX_WIDTH_HEIGHT || self.height > MAX_WIDTH_HEIGHT { - // Limit very large image sizes to avoid OOM issues. Images with these sizes are - // unlikely to be valid anyhow. - return Err(DecoderError::ImageTooLarge(self.width, self.height).into()); - } - - if self.height == i32::min_value() { - return Err(DecoderError::InvalidHeight.into()); - } - - // A negative height indicates a top-down DIB. - if self.height < 0 { - self.height *= -1; - self.top_down = true; - } - - check_for_overflow(self.width, self.height, self.num_channels())?; - - // Number of planes (format specifies that this should be 1). - if self.reader.read_u16::<LittleEndian>()? != 1 { - return Err(DecoderError::MoreThanOnePlane.into()); - } - - self.bit_count = self.reader.read_u16::<LittleEndian>()?; - let image_type_u32 = self.reader.read_u32::<LittleEndian>()?; - - // Top-down dibs can not be compressed. - if self.top_down && image_type_u32 != 0 && image_type_u32 != 3 { - return Err(DecoderError::ImageTypeInvalidForTopDown(image_type_u32).into()); - } - self.image_type = match image_type_u32 { - 0 => match self.bit_count { - 1 | 2 | 4 | 8 => ImageType::Palette, - 16 => ImageType::RGB16, - 24 => ImageType::RGB24, - 32 if self.add_alpha_channel => ImageType::RGBA32, - 32 => ImageType::RGB32, - _ => { - return Err(DecoderError::InvalidChannelWidth( - ChannelWidthError::Rgb, - self.bit_count, - ) - .into()) - } - }, - 1 => match self.bit_count { - 8 => ImageType::RLE8, - _ => { - return Err(DecoderError::InvalidChannelWidth( - ChannelWidthError::Rle8, - self.bit_count, - ) - .into()) - } - }, - 2 => match self.bit_count { - 4 => ImageType::RLE4, - _ => { - return Err(DecoderError::InvalidChannelWidth( - ChannelWidthError::Rle4, - self.bit_count, - ) - .into()) - } - }, - 3 => match self.bit_count { - 16 => ImageType::Bitfields16, - 32 => ImageType::Bitfields32, - _ => { - return Err(DecoderError::InvalidChannelWidth( - ChannelWidthError::Bitfields, - self.bit_count, - ) - .into()) - } - }, - 4 => { - // JPEG compression is not implemented yet. - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Bmp.into(), - UnsupportedErrorKind::GenericFeature("JPEG compression".to_owned()), - ), - )); - } - 5 => { - // PNG compression is not implemented yet. - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Bmp.into(), - UnsupportedErrorKind::GenericFeature("PNG compression".to_owned()), - ), - )); - } - 11 | 12 | 13 => { - // CMYK types are not implemented yet. - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Bmp.into(), - UnsupportedErrorKind::GenericFeature("CMYK format".to_owned()), - ), - )); - } - _ => { - // Unknown compression type. - return Err(DecoderError::ImageTypeUnknown(image_type_u32).into()); - } - }; - - // The next 12 bytes represent data array size in bytes, - // followed the horizontal and vertical printing resolutions - // We will calculate the pixel array size using width & height of image - // We're not interesting the horz or vert printing resolutions - self.reader.read_u32::<LittleEndian>()?; - self.reader.read_u32::<LittleEndian>()?; - self.reader.read_u32::<LittleEndian>()?; - - self.colors_used = self.reader.read_u32::<LittleEndian>()?; - - // The next 4 bytes represent number of "important" colors - // We're not interested in this value, so we'll skip it - self.reader.read_u32::<LittleEndian>()?; - - Ok(()) - } - - fn read_bitmasks(&mut self) -> ImageResult<()> { - let r_mask = self.reader.read_u32::<LittleEndian>()?; - let g_mask = self.reader.read_u32::<LittleEndian>()?; - let b_mask = self.reader.read_u32::<LittleEndian>()?; - - let a_mask = match self.bmp_header_type { - BMPHeaderType::V3 | BMPHeaderType::V4 | BMPHeaderType::V5 => { - self.reader.read_u32::<LittleEndian>()? - } - _ => 0, - }; - - self.bitfields = match self.image_type { - ImageType::Bitfields16 => { - Some(Bitfields::from_mask(r_mask, g_mask, b_mask, a_mask, 16)?) - } - ImageType::Bitfields32 => { - Some(Bitfields::from_mask(r_mask, g_mask, b_mask, a_mask, 32)?) - } - _ => None, - }; - - if self.bitfields.is_some() && a_mask != 0 { - self.add_alpha_channel = true; - } - - Ok(()) - } - - fn read_metadata(&mut self) -> ImageResult<()> { - if !self.has_loaded_metadata { - self.read_file_header()?; - let bmp_header_offset = self.reader.stream_position()?; - let bmp_header_size = self.reader.read_u32::<LittleEndian>()?; - let bmp_header_end = bmp_header_offset + u64::from(bmp_header_size); - - self.bmp_header_type = match bmp_header_size { - BITMAPCOREHEADER_SIZE => BMPHeaderType::Core, - BITMAPINFOHEADER_SIZE => BMPHeaderType::Info, - BITMAPV2HEADER_SIZE => BMPHeaderType::V2, - BITMAPV3HEADER_SIZE => BMPHeaderType::V3, - BITMAPV4HEADER_SIZE => BMPHeaderType::V4, - BITMAPV5HEADER_SIZE => BMPHeaderType::V5, - _ if bmp_header_size < BITMAPCOREHEADER_SIZE => { - // Size of any valid header types won't be smaller than core header type. - return Err(DecoderError::HeaderTooSmall(bmp_header_size).into()); - } - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Bmp.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Unknown bitmap header type (size={})", - bmp_header_size - )), - ), - )) - } - }; - - match self.bmp_header_type { - BMPHeaderType::Core => { - self.read_bitmap_core_header()?; - } - BMPHeaderType::Info - | BMPHeaderType::V2 - | BMPHeaderType::V3 - | BMPHeaderType::V4 - | BMPHeaderType::V5 => { - self.read_bitmap_info_header()?; - } - }; - - match self.image_type { - ImageType::Bitfields16 | ImageType::Bitfields32 => self.read_bitmasks()?, - _ => {} - }; - - self.reader.seek(SeekFrom::Start(bmp_header_end))?; - - match self.image_type { - ImageType::Palette | ImageType::RLE4 | ImageType::RLE8 => self.read_palette()?, - _ => {} - }; - - if self.no_file_header { - // Use the offset of the end of metadata instead of reading a BMP file header. - self.data_offset = self.reader.stream_position()?; - } - - self.has_loaded_metadata = true; - } - Ok(()) - } - - #[cfg(feature = "ico")] - #[doc(hidden)] - pub fn read_metadata_in_ico_format(&mut self) -> ImageResult<()> { - self.no_file_header = true; - self.add_alpha_channel = true; - self.read_metadata()?; - - // The height field in an ICO file is doubled to account for the AND mask - // (whether or not an AND mask is actually present). - self.height /= 2; - Ok(()) - } - - fn get_palette_size(&mut self) -> ImageResult<usize> { - match self.colors_used { - 0 => Ok(1 << self.bit_count), - _ => { - if self.colors_used > 1 << self.bit_count { - return Err(DecoderError::PaletteSizeExceeded { - colors_used: self.colors_used, - bit_count: self.bit_count, - } - .into()); - } - Ok(self.colors_used as usize) - } - } - } - - fn bytes_per_color(&self) -> usize { - match self.bmp_header_type { - BMPHeaderType::Core => 3, - _ => 4, - } - } - - fn read_palette(&mut self) -> ImageResult<()> { - const MAX_PALETTE_SIZE: usize = 256; // Palette indices are u8. - - let bytes_per_color = self.bytes_per_color(); - let palette_size = self.get_palette_size()?; - let max_length = MAX_PALETTE_SIZE * bytes_per_color; - - let length = palette_size * bytes_per_color; - let mut buf = Vec::with_capacity(max_length); - - // Resize and read the palette entries to the buffer. - // We limit the buffer to at most 256 colours to avoid any oom issues as - // 8-bit images can't reference more than 256 indexes anyhow. - buf.resize(cmp::min(length, max_length), 0); - self.reader.by_ref().read_exact(&mut buf)?; - - // Allocate 256 entries even if palette_size is smaller, to prevent corrupt files from - // causing an out-of-bounds array access. - match length.cmp(&max_length) { - Ordering::Greater => { - self.reader - .seek(SeekFrom::Current((length - max_length) as i64))?; - } - Ordering::Less => buf.resize(max_length, 0), - Ordering::Equal => (), - } - - let p: Vec<[u8; 3]> = (0..MAX_PALETTE_SIZE) - .map(|i| { - let b = buf[bytes_per_color * i]; - let g = buf[bytes_per_color * i + 1]; - let r = buf[bytes_per_color * i + 2]; - [r, g, b] - }) - .collect(); - - self.palette = Some(p); - - Ok(()) - } - - /// Get the palette that is embedded in the BMP image, if any. - pub fn get_palette(&self) -> Option<&[[u8; 3]]> { - self.palette.as_ref().map(|vec| &vec[..]) - } - - fn num_channels(&self) -> usize { - if self.indexed_color { - 1 - } else if self.add_alpha_channel { - 4 - } else { - 3 - } - } - - fn rows<'a>(&self, pixel_data: &'a mut [u8]) -> RowIterator<'a> { - let stride = self.width as usize * self.num_channels(); - if self.top_down { - RowIterator { - chunks: Chunker::FromTop(pixel_data.chunks_mut(stride)), - } - } else { - RowIterator { - chunks: Chunker::FromBottom(pixel_data.chunks_mut(stride).rev()), - } - } - } - - fn read_palettized_pixel_data(&mut self, buf: &mut [u8]) -> ImageResult<()> { - let num_channels = self.num_channels(); - let row_byte_length = ((i32::from(self.bit_count) * self.width + 31) / 32 * 4) as usize; - let mut indices = vec![0; row_byte_length]; - let palette = self.palette.as_ref().unwrap(); - let bit_count = self.bit_count; - let reader = &mut self.reader; - let width = self.width as usize; - let skip_palette = self.indexed_color; - - reader.seek(SeekFrom::Start(self.data_offset))?; - - if num_channels == 4 { - buf.chunks_exact_mut(4).for_each(|c| c[3] = 0xFF); - } - - with_rows( - buf, - self.width, - self.height, - num_channels, - self.top_down, - |row| { - reader.read_exact(&mut indices)?; - if skip_palette { - row.clone_from_slice(&indices[0..width]); - } else { - let mut pixel_iter = row.chunks_mut(num_channels); - match bit_count { - 1 => { - set_1bit_pixel_run(&mut pixel_iter, palette, indices.iter()); - } - 2 => { - set_2bit_pixel_run(&mut pixel_iter, palette, indices.iter(), width); - } - 4 => { - set_4bit_pixel_run(&mut pixel_iter, palette, indices.iter(), width); - } - 8 => { - set_8bit_pixel_run(&mut pixel_iter, palette, indices.iter(), width); - } - _ => panic!(), - }; - } - Ok(()) - }, - )?; - - Ok(()) - } - - fn read_16_bit_pixel_data( - &mut self, - buf: &mut [u8], - bitfields: Option<&Bitfields>, - ) -> ImageResult<()> { - let num_channels = self.num_channels(); - let row_padding_len = self.width as usize % 2 * 2; - let row_padding = &mut [0; 2][..row_padding_len]; - let bitfields = match bitfields { - Some(b) => b, - None => self.bitfields.as_ref().unwrap(), - }; - let reader = &mut self.reader; - - reader.seek(SeekFrom::Start(self.data_offset))?; - - with_rows( - buf, - self.width, - self.height, - num_channels, - self.top_down, - |row| { - for pixel in row.chunks_mut(num_channels) { - let data = u32::from(reader.read_u16::<LittleEndian>()?); - - pixel[0] = bitfields.r.read(data); - pixel[1] = bitfields.g.read(data); - pixel[2] = bitfields.b.read(data); - if num_channels == 4 { - if bitfields.a.len != 0 { - pixel[3] = bitfields.a.read(data); - } else { - pixel[3] = 0xFF; - } - } - } - reader.read_exact(row_padding) - }, - )?; - - Ok(()) - } - - /// Read image data from a reader in 32-bit formats that use bitfields. - fn read_32_bit_pixel_data(&mut self, buf: &mut [u8]) -> ImageResult<()> { - let num_channels = self.num_channels(); - - let bitfields = self.bitfields.as_ref().unwrap(); - - let reader = &mut self.reader; - reader.seek(SeekFrom::Start(self.data_offset))?; - - with_rows( - buf, - self.width, - self.height, - num_channels, - self.top_down, - |row| { - for pixel in row.chunks_mut(num_channels) { - let data = reader.read_u32::<LittleEndian>()?; - - pixel[0] = bitfields.r.read(data); - pixel[1] = bitfields.g.read(data); - pixel[2] = bitfields.b.read(data); - if num_channels == 4 { - if bitfields.a.len != 0 { - pixel[3] = bitfields.a.read(data); - } else { - pixel[3] = 0xff; - } - } - } - Ok(()) - }, - )?; - - Ok(()) - } - - /// Read image data from a reader where the colours are stored as 8-bit values (24 or 32-bit). - fn read_full_byte_pixel_data( - &mut self, - buf: &mut [u8], - format: &FormatFullBytes, - ) -> ImageResult<()> { - let num_channels = self.num_channels(); - let row_padding_len = match *format { - FormatFullBytes::RGB24 => (4 - (self.width as usize * 3) % 4) % 4, - _ => 0, - }; - let row_padding = &mut [0; 4][..row_padding_len]; - - self.reader.seek(SeekFrom::Start(self.data_offset))?; - - let reader = &mut self.reader; - - with_rows( - buf, - self.width, - self.height, - num_channels, - self.top_down, - |row| { - for pixel in row.chunks_mut(num_channels) { - if *format == FormatFullBytes::Format888 { - reader.read_u8()?; - } - - // Read the colour values (b, g, r). - // Reading 3 bytes and reversing them is significantly faster than reading one - // at a time. - reader.read_exact(&mut pixel[0..3])?; - pixel[0..3].reverse(); - - if *format == FormatFullBytes::RGB32 { - reader.read_u8()?; - } - - // Read the alpha channel if present - if *format == FormatFullBytes::RGBA32 { - reader.read_exact(&mut pixel[3..4])?; - } else if num_channels == 4 { - pixel[3] = 0xFF; - } - } - reader.read_exact(row_padding) - }, - )?; - - Ok(()) - } - - fn read_rle_data(&mut self, buf: &mut [u8], image_type: ImageType) -> ImageResult<()> { - // Seek to the start of the actual image data. - self.reader.seek(SeekFrom::Start(self.data_offset))?; - - let num_channels = self.num_channels(); - let p = self.palette.as_ref().unwrap(); - - // Handling deltas in the RLE scheme means that we need to manually - // iterate through rows and pixels. Even if we didn't have to handle - // deltas, we have to ensure that a single runlength doesn't straddle - // two rows. - let mut row_iter = self.rows(buf); - - while let Some(row) = row_iter.next() { - let mut pixel_iter = row.chunks_mut(num_channels); - - let mut x = 0; - loop { - let instruction = { - let control_byte = self.reader.read_u8()?; - match control_byte { - RLE_ESCAPE => { - let op = self.reader.read_u8()?; - - match op { - RLE_ESCAPE_EOL => RLEInsn::EndOfRow, - RLE_ESCAPE_EOF => RLEInsn::EndOfFile, - RLE_ESCAPE_DELTA => { - let xdelta = self.reader.read_u8()?; - let ydelta = self.reader.read_u8()?; - RLEInsn::Delta(xdelta, ydelta) - } - _ => { - let mut length = op as usize; - if self.image_type == ImageType::RLE4 { - length = (length + 1) / 2; - } - length += length & 1; - let mut buffer = vec![0; length]; - self.reader.read_exact(&mut buffer)?; - RLEInsn::Absolute(op, buffer) - } - } - } - _ => { - let palette_index = self.reader.read_u8()?; - RLEInsn::PixelRun(control_byte, palette_index) - } - } - }; - - match instruction { - RLEInsn::EndOfFile => { - pixel_iter.for_each(|p| p.fill(0)); - row_iter.for_each(|r| r.fill(0)); - return Ok(()); - } - RLEInsn::EndOfRow => { - pixel_iter.for_each(|p| p.fill(0)); - break; - } - RLEInsn::Delta(x_delta, y_delta) => { - // The msdn site on bitmap compression doesn't specify - // what happens to the values skipped when encountering - // a delta code, however IE and the windows image - // preview seems to replace them with black pixels, - // so we stick to that. - - if y_delta > 0 { - // Zero out the remainder of the current row. - pixel_iter.for_each(|p| p.fill(0)); - - // If any full rows are skipped, zero them out. - for _ in 1..y_delta { - let row = row_iter.next().ok_or(DecoderError::CorruptRleData)?; - row.fill(0); - } - - // Set the pixel iterator to the start of the next row. - pixel_iter = row_iter - .next() - .ok_or(DecoderError::CorruptRleData)? - .chunks_mut(num_channels); - - // Zero out the pixels up to the current point in the row. - for _ in 0..x { - pixel_iter - .next() - .ok_or(DecoderError::CorruptRleData)? - .fill(0); - } - } - - for _ in 0..x_delta { - let pixel = pixel_iter.next().ok_or(DecoderError::CorruptRleData)?; - pixel.fill(0); - } - x += x_delta as usize; - } - RLEInsn::Absolute(length, indices) => { - // Absolute mode cannot span rows, so if we run - // out of pixels to process, we should stop - // processing the image. - match image_type { - ImageType::RLE8 => { - if !set_8bit_pixel_run( - &mut pixel_iter, - p, - indices.iter(), - length as usize, - ) { - return Err(DecoderError::CorruptRleData.into()); - } - } - ImageType::RLE4 => { - if !set_4bit_pixel_run( - &mut pixel_iter, - p, - indices.iter(), - length as usize, - ) { - return Err(DecoderError::CorruptRleData.into()); - } - } - _ => unreachable!(), - } - x += length as usize; - } - RLEInsn::PixelRun(n_pixels, palette_index) => { - // A pixel run isn't allowed to span rows, but we - // simply continue on to the next row if we run - // out of pixels to set. - match image_type { - ImageType::RLE8 => { - if !set_8bit_pixel_run( - &mut pixel_iter, - p, - repeat(&palette_index), - n_pixels as usize, - ) { - return Err(DecoderError::CorruptRleData.into()); - } - } - ImageType::RLE4 => { - if !set_4bit_pixel_run( - &mut pixel_iter, - p, - repeat(&palette_index), - n_pixels as usize, - ) { - return Err(DecoderError::CorruptRleData.into()); - } - } - _ => unreachable!(), - } - x += n_pixels as usize; - } - } - } - } - - Ok(()) - } - - /// Read the actual data of the image. This function is deliberately not public because it - /// cannot be called multiple times without seeking back the underlying reader in between. - pub(crate) fn read_image_data(&mut self, buf: &mut [u8]) -> ImageResult<()> { - match self.image_type { - ImageType::Palette => self.read_palettized_pixel_data(buf), - ImageType::RGB16 => self.read_16_bit_pixel_data(buf, Some(&R5_G5_B5_COLOR_MASK)), - ImageType::RGB24 => self.read_full_byte_pixel_data(buf, &FormatFullBytes::RGB24), - ImageType::RGB32 => self.read_full_byte_pixel_data(buf, &FormatFullBytes::RGB32), - ImageType::RGBA32 => self.read_full_byte_pixel_data(buf, &FormatFullBytes::RGBA32), - ImageType::RLE8 => self.read_rle_data(buf, ImageType::RLE8), - ImageType::RLE4 => self.read_rle_data(buf, ImageType::RLE4), - ImageType::Bitfields16 => match self.bitfields { - Some(_) => self.read_16_bit_pixel_data(buf, None), - None => Err(DecoderError::BitfieldMasksMissing(16).into()), - }, - ImageType::Bitfields32 => match self.bitfields { - Some(R8_G8_B8_COLOR_MASK) => { - self.read_full_byte_pixel_data(buf, &FormatFullBytes::Format888) - } - Some(R8_G8_B8_A8_COLOR_MASK) => { - self.read_full_byte_pixel_data(buf, &FormatFullBytes::RGBA32) - } - Some(_) => self.read_32_bit_pixel_data(buf), - None => Err(DecoderError::BitfieldMasksMissing(32).into()), - }, - } - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct BmpReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for BmpReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoder<'a> for BmpDecoder<R> { - type Reader = BmpReader<R>; - - fn dimensions(&self) -> (u32, u32) { - (self.width as u32, self.height as u32) - } - - fn color_type(&self) -> ColorType { - if self.indexed_color { - ColorType::L8 - } else if self.add_alpha_channel { - ColorType::Rgba8 - } else { - ColorType::Rgb8 - } - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(BmpReader( - Cursor::new(image::decoder_to_vec(self)?), - PhantomData, - )) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - self.read_image_data(buf) - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoderRect<'a> for BmpDecoder<R> { - fn read_rect_with_progress<F: Fn(Progress)>( - &mut self, - x: u32, - y: u32, - width: u32, - height: u32, - buf: &mut [u8], - progress_callback: F, - ) -> ImageResult<()> { - let start = self.reader.stream_position()?; - image::load_rect( - x, - y, - width, - height, - buf, - progress_callback, - self, - |_, _| Ok(()), - |s, buf| s.read_image_data(buf), - )?; - self.reader.seek(SeekFrom::Start(start))?; - Ok(()) - } -} - -#[cfg(test)] -mod test { - use super::*; - - #[test] - fn test_bitfield_len() { - for len in 1..9 { - let bitfield = Bitfield { shift: 0, len }; - for i in 0..(1 << len) { - let read = bitfield.read(i); - let calc = (i as f64 / ((1 << len) - 1) as f64 * 255f64).round() as u8; - if read != calc { - println!("len:{} i:{} read:{} calc:{}", len, i, read, calc); - } - assert_eq!(read, calc); - } - } - } - - #[test] - fn read_rect() { - let f = std::fs::File::open("tests/images/bmp/images/Core_8_Bit.bmp").unwrap(); - let mut decoder = super::BmpDecoder::new(f).unwrap(); - - let mut buf: Vec<u8> = vec![0; 8 * 8 * 3]; - decoder.read_rect(0, 0, 8, 8, &mut *buf).unwrap(); - } - - #[test] - fn read_rle_too_short() { - let data = vec![ - 0x42, 0x4d, 0x04, 0xee, 0xfe, 0xff, 0xff, 0x10, 0xff, 0x00, 0x04, 0x00, 0x00, 0x00, - 0x7c, 0x00, 0x00, 0x00, 0x0c, 0x41, 0x00, 0x00, 0x07, 0x10, 0x00, 0x00, 0x01, 0x00, - 0x04, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x00, - 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x21, - 0xff, 0x00, 0x66, 0x61, 0x72, 0x62, 0x66, 0x65, 0x6c, 0x64, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0xff, 0xd8, 0xff, 0x00, 0x00, 0x19, 0x51, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfa, 0xff, 0x00, 0x00, 0x00, - 0x00, 0x01, 0x00, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, - 0x00, 0x00, 0x00, 0x2d, 0x31, 0x31, 0x35, 0x36, 0x00, 0xff, 0x00, 0x00, 0x52, 0x3a, - 0x37, 0x30, 0x7e, 0x71, 0x63, 0x91, 0x5a, 0x04, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2d, 0x35, 0x37, 0x00, 0xff, 0x00, 0x00, 0x52, - 0x3a, 0x37, 0x30, 0x7e, 0x71, 0x63, 0x91, 0x5a, 0x04, 0x05, 0x3c, 0x00, 0x00, 0x11, - 0x00, 0x5d, 0x7a, 0x82, 0xb7, 0xca, 0x2d, 0x31, 0xff, 0xff, 0xc7, 0x95, 0x33, 0x2e, - 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c, 0x00, - 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x66, 0x00, 0x4d, - 0x4d, 0x00, 0x2a, 0x00, - ]; - - let decoder = BmpDecoder::new(Cursor::new(&data)).unwrap(); - let mut buf = vec![0; usize::try_from(decoder.total_bytes()).unwrap()]; - assert!(decoder.read_image(&mut buf).is_ok()); - } - - #[test] - fn test_no_header() { - let tests = [ - "Info_R8_G8_B8.bmp", - "Info_A8_R8_G8_B8.bmp", - "Info_8_Bit.bmp", - "Info_4_Bit.bmp", - "Info_1_Bit.bmp", - ]; - - for name in &tests { - let path = format!("tests/images/bmp/images/{name}"); - let ref_img = crate::open(&path).unwrap(); - let mut data = std::fs::read(&path).unwrap(); - // skip the BITMAPFILEHEADER - let slice = &mut data[14..]; - let decoder = BmpDecoder::new_without_file_header(Cursor::new(slice)).unwrap(); - let no_hdr_img = crate::DynamicImage::from_decoder(decoder).unwrap(); - assert_eq!(ref_img, no_hdr_img); - } - } -} diff --git a/vendor/image/src/codecs/bmp/encoder.rs b/vendor/image/src/codecs/bmp/encoder.rs deleted file mode 100644 index c90c063..0000000 --- a/vendor/image/src/codecs/bmp/encoder.rs +++ /dev/null @@ -1,388 +0,0 @@ -use byteorder::{LittleEndian, WriteBytesExt}; -use std::io::{self, Write}; - -use crate::error::{ - EncodingError, ImageError, ImageFormatHint, ImageResult, ParameterError, ParameterErrorKind, -}; -use crate::image::ImageEncoder; -use crate::{color, ImageFormat}; - -const BITMAPFILEHEADER_SIZE: u32 = 14; -const BITMAPINFOHEADER_SIZE: u32 = 40; -const BITMAPV4HEADER_SIZE: u32 = 108; - -/// The representation of a BMP encoder. -pub struct BmpEncoder<'a, W: 'a> { - writer: &'a mut W, -} - -impl<'a, W: Write + 'a> BmpEncoder<'a, W> { - /// Create a new encoder that writes its output to ```w```. - pub fn new(w: &'a mut W) -> Self { - BmpEncoder { writer: w } - } - - /// Encodes the image ```image``` - /// that has dimensions ```width``` and ```height``` - /// and ```ColorType``` ```c```. - pub fn encode( - &mut self, - image: &[u8], - width: u32, - height: u32, - c: color::ColorType, - ) -> ImageResult<()> { - self.encode_with_palette(image, width, height, c, None) - } - - /// Same as ```encode```, but allow a palette to be passed in. - /// The ```palette``` is ignored for color types other than Luma/Luma-with-alpha. - pub fn encode_with_palette( - &mut self, - image: &[u8], - width: u32, - height: u32, - c: color::ColorType, - palette: Option<&[[u8; 3]]>, - ) -> ImageResult<()> { - if palette.is_some() && c != color::ColorType::L8 && c != color::ColorType::La8 { - return Err(ImageError::IoError(io::Error::new( - io::ErrorKind::InvalidInput, - format!( - "Unsupported color type {:?} when using a non-empty palette. Supported types: Gray(8), GrayA(8).", - c - ), - ))); - } - - let bmp_header_size = BITMAPFILEHEADER_SIZE; - - let (dib_header_size, written_pixel_size, palette_color_count) = - get_pixel_info(c, palette)?; - let row_pad_size = (4 - (width * written_pixel_size) % 4) % 4; // each row must be padded to a multiple of 4 bytes - let image_size = width - .checked_mul(height) - .and_then(|v| v.checked_mul(written_pixel_size)) - .and_then(|v| v.checked_add(height * row_pad_size)) - .ok_or_else(|| { - ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - )) - })?; - let palette_size = palette_color_count * 4; // all palette colors are BGRA - let file_size = bmp_header_size - .checked_add(dib_header_size) - .and_then(|v| v.checked_add(palette_size)) - .and_then(|v| v.checked_add(image_size)) - .ok_or_else(|| { - ImageError::Encoding(EncodingError::new( - ImageFormatHint::Exact(ImageFormat::Bmp), - "calculated BMP header size larger than 2^32", - )) - })?; - - // write BMP header - self.writer.write_u8(b'B')?; - self.writer.write_u8(b'M')?; - self.writer.write_u32::<LittleEndian>(file_size)?; // file size - self.writer.write_u16::<LittleEndian>(0)?; // reserved 1 - self.writer.write_u16::<LittleEndian>(0)?; // reserved 2 - self.writer - .write_u32::<LittleEndian>(bmp_header_size + dib_header_size + palette_size)?; // image data offset - - // write DIB header - self.writer.write_u32::<LittleEndian>(dib_header_size)?; - self.writer.write_i32::<LittleEndian>(width as i32)?; - self.writer.write_i32::<LittleEndian>(height as i32)?; - self.writer.write_u16::<LittleEndian>(1)?; // color planes - self.writer - .write_u16::<LittleEndian>((written_pixel_size * 8) as u16)?; // bits per pixel - if dib_header_size >= BITMAPV4HEADER_SIZE { - // Assume BGRA32 - self.writer.write_u32::<LittleEndian>(3)?; // compression method - bitfields - } else { - self.writer.write_u32::<LittleEndian>(0)?; // compression method - no compression - } - self.writer.write_u32::<LittleEndian>(image_size)?; - self.writer.write_i32::<LittleEndian>(0)?; // horizontal ppm - self.writer.write_i32::<LittleEndian>(0)?; // vertical ppm - self.writer.write_u32::<LittleEndian>(palette_color_count)?; - self.writer.write_u32::<LittleEndian>(0)?; // all colors are important - if dib_header_size >= BITMAPV4HEADER_SIZE { - // Assume BGRA32 - self.writer.write_u32::<LittleEndian>(0xff << 16)?; // red mask - self.writer.write_u32::<LittleEndian>(0xff << 8)?; // green mask - self.writer.write_u32::<LittleEndian>(0xff)?; // blue mask - self.writer.write_u32::<LittleEndian>(0xff << 24)?; // alpha mask - self.writer.write_u32::<LittleEndian>(0x73524742)?; // colorspace - sRGB - - // endpoints (3x3) and gamma (3) - for _ in 0..12 { - self.writer.write_u32::<LittleEndian>(0)?; - } - } - - // write image data - match c { - color::ColorType::Rgb8 => self.encode_rgb(image, width, height, row_pad_size, 3)?, - color::ColorType::Rgba8 => self.encode_rgba(image, width, height, row_pad_size, 4)?, - color::ColorType::L8 => { - self.encode_gray(image, width, height, row_pad_size, 1, palette)? - } - color::ColorType::La8 => { - self.encode_gray(image, width, height, row_pad_size, 2, palette)? - } - _ => { - return Err(ImageError::IoError(io::Error::new( - io::ErrorKind::InvalidInput, - &get_unsupported_error_message(c)[..], - ))) - } - } - - Ok(()) - } - - fn encode_rgb( - &mut self, - image: &[u8], - width: u32, - height: u32, - row_pad_size: u32, - bytes_per_pixel: u32, - ) -> io::Result<()> { - let width = width as usize; - let height = height as usize; - let x_stride = bytes_per_pixel as usize; - let y_stride = width * x_stride; - for row in (0..height).rev() { - // from the bottom up - let row_start = row * y_stride; - for px in image[row_start..][..y_stride].chunks_exact(x_stride) { - let r = px[0]; - let g = px[1]; - let b = px[2]; - // written as BGR - self.writer.write_all(&[b, g, r])?; - } - self.write_row_pad(row_pad_size)?; - } - - Ok(()) - } - - fn encode_rgba( - &mut self, - image: &[u8], - width: u32, - height: u32, - row_pad_size: u32, - bytes_per_pixel: u32, - ) -> io::Result<()> { - let width = width as usize; - let height = height as usize; - let x_stride = bytes_per_pixel as usize; - let y_stride = width * x_stride; - for row in (0..height).rev() { - // from the bottom up - let row_start = row * y_stride; - for px in image[row_start..][..y_stride].chunks_exact(x_stride) { - let r = px[0]; - let g = px[1]; - let b = px[2]; - let a = px[3]; - // written as BGRA - self.writer.write_all(&[b, g, r, a])?; - } - self.write_row_pad(row_pad_size)?; - } - - Ok(()) - } - - fn encode_gray( - &mut self, - image: &[u8], - width: u32, - height: u32, - row_pad_size: u32, - bytes_per_pixel: u32, - palette: Option<&[[u8; 3]]>, - ) -> io::Result<()> { - // write grayscale palette - if let Some(palette) = palette { - for item in palette { - // each color is written as BGRA, where A is always 0 - self.writer.write_all(&[item[2], item[1], item[0], 0])?; - } - } else { - for val in 0u8..=255 { - // each color is written as BGRA, where A is always 0 and since only grayscale is being written, B = G = R = index - self.writer.write_all(&[val, val, val, 0])?; - } - } - - // write image data - let x_stride = bytes_per_pixel; - let y_stride = width * x_stride; - for row in (0..height).rev() { - // from the bottom up - let row_start = row * y_stride; - for col in 0..width { - let pixel_start = (row_start + (col * x_stride)) as usize; - // color value is equal to the palette index - self.writer.write_u8(image[pixel_start])?; - // alpha is never written as it's not widely supported - } - - self.write_row_pad(row_pad_size)?; - } - - Ok(()) - } - - fn write_row_pad(&mut self, row_pad_size: u32) -> io::Result<()> { - for _ in 0..row_pad_size { - self.writer.write_u8(0)?; - } - - Ok(()) - } -} - -impl<'a, W: Write> ImageEncoder for BmpEncoder<'a, W> { - fn write_image( - mut self, - buf: &[u8], - width: u32, - height: u32, - color_type: color::ColorType, - ) -> ImageResult<()> { - self.encode(buf, width, height, color_type) - } -} - -fn get_unsupported_error_message(c: color::ColorType) -> String { - format!( - "Unsupported color type {:?}. Supported types: RGB(8), RGBA(8), Gray(8), GrayA(8).", - c - ) -} - -/// Returns a tuple representing: (dib header size, written pixel size, palette color count). -fn get_pixel_info(c: color::ColorType, palette: Option<&[[u8; 3]]>) -> io::Result<(u32, u32, u32)> { - let sizes = match c { - color::ColorType::Rgb8 => (BITMAPINFOHEADER_SIZE, 3, 0), - color::ColorType::Rgba8 => (BITMAPV4HEADER_SIZE, 4, 0), - color::ColorType::L8 => ( - BITMAPINFOHEADER_SIZE, - 1, - palette.map(|p| p.len()).unwrap_or(256) as u32, - ), - color::ColorType::La8 => ( - BITMAPINFOHEADER_SIZE, - 1, - palette.map(|p| p.len()).unwrap_or(256) as u32, - ), - _ => { - return Err(io::Error::new( - io::ErrorKind::InvalidInput, - &get_unsupported_error_message(c)[..], - )) - } - }; - - Ok(sizes) -} - -#[cfg(test)] -mod tests { - use super::super::BmpDecoder; - use super::BmpEncoder; - use crate::color::ColorType; - use crate::image::ImageDecoder; - use std::io::Cursor; - - fn round_trip_image(image: &[u8], width: u32, height: u32, c: ColorType) -> Vec<u8> { - let mut encoded_data = Vec::new(); - { - let mut encoder = BmpEncoder::new(&mut encoded_data); - encoder - .encode(&image, width, height, c) - .expect("could not encode image"); - } - - let decoder = BmpDecoder::new(Cursor::new(&encoded_data)).expect("failed to decode"); - - let mut buf = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut buf).expect("failed to decode"); - buf - } - - #[test] - fn round_trip_single_pixel_rgb() { - let image = [255u8, 0, 0]; // single red pixel - let decoded = round_trip_image(&image, 1, 1, ColorType::Rgb8); - assert_eq!(3, decoded.len()); - assert_eq!(255, decoded[0]); - assert_eq!(0, decoded[1]); - assert_eq!(0, decoded[2]); - } - - #[test] - #[cfg(target_pointer_width = "64")] - fn huge_files_return_error() { - let mut encoded_data = Vec::new(); - let image = vec![0u8; 3 * 40_000 * 40_000]; // 40_000x40_000 pixels, 3 bytes per pixel, allocated on the heap - let mut encoder = BmpEncoder::new(&mut encoded_data); - let result = encoder.encode(&image, 40_000, 40_000, ColorType::Rgb8); - assert!(result.is_err()); - } - - #[test] - fn round_trip_single_pixel_rgba() { - let image = [1, 2, 3, 4]; - let decoded = round_trip_image(&image, 1, 1, ColorType::Rgba8); - assert_eq!(&decoded[..], &image[..]); - } - - #[test] - fn round_trip_3px_rgb() { - let image = [0u8; 3 * 3 * 3]; // 3x3 pixels, 3 bytes per pixel - let _decoded = round_trip_image(&image, 3, 3, ColorType::Rgb8); - } - - #[test] - fn round_trip_gray() { - let image = [0u8, 1, 2]; // 3 pixels - let decoded = round_trip_image(&image, 3, 1, ColorType::L8); - // should be read back as 3 RGB pixels - assert_eq!(9, decoded.len()); - assert_eq!(0, decoded[0]); - assert_eq!(0, decoded[1]); - assert_eq!(0, decoded[2]); - assert_eq!(1, decoded[3]); - assert_eq!(1, decoded[4]); - assert_eq!(1, decoded[5]); - assert_eq!(2, decoded[6]); - assert_eq!(2, decoded[7]); - assert_eq!(2, decoded[8]); - } - - #[test] - fn round_trip_graya() { - let image = [0u8, 0, 1, 0, 2, 0]; // 3 pixels, each with an alpha channel - let decoded = round_trip_image(&image, 1, 3, ColorType::La8); - // should be read back as 3 RGB pixels - assert_eq!(9, decoded.len()); - assert_eq!(0, decoded[0]); - assert_eq!(0, decoded[1]); - assert_eq!(0, decoded[2]); - assert_eq!(1, decoded[3]); - assert_eq!(1, decoded[4]); - assert_eq!(1, decoded[5]); - assert_eq!(2, decoded[6]); - assert_eq!(2, decoded[7]); - assert_eq!(2, decoded[8]); - } -} diff --git a/vendor/image/src/codecs/bmp/mod.rs b/vendor/image/src/codecs/bmp/mod.rs deleted file mode 100644 index 549b1cf..0000000 --- a/vendor/image/src/codecs/bmp/mod.rs +++ /dev/null @@ -1,14 +0,0 @@ -//! Decoding and Encoding of BMP Images -//! -//! A decoder and encoder for BMP (Windows Bitmap) images -//! -//! # Related Links -//! * <https://msdn.microsoft.com/en-us/library/windows/desktop/dd183375%28v=vs.85%29.aspx> -//! * <https://en.wikipedia.org/wiki/BMP_file_format> -//! - -pub use self::decoder::BmpDecoder; -pub use self::encoder::BmpEncoder; - -mod decoder; -mod encoder; diff --git a/vendor/image/src/codecs/dds.rs b/vendor/image/src/codecs/dds.rs deleted file mode 100644 index f0a7357..0000000 --- a/vendor/image/src/codecs/dds.rs +++ /dev/null @@ -1,375 +0,0 @@ -//! Decoding of DDS images -//! -//! DDS (DirectDraw Surface) is a container format for storing DXT (S3TC) compressed images. -//! -//! # Related Links -//! * <https://docs.microsoft.com/en-us/windows/win32/direct3ddds/dx-graphics-dds-pguide> - Description of the DDS format. - -use std::io::Read; -use std::{error, fmt}; - -use byteorder::{LittleEndian, ReadBytesExt}; - -#[allow(deprecated)] -use crate::codecs::dxt::{DxtDecoder, DxtReader, DxtVariant}; -use crate::color::ColorType; -use crate::error::{ - DecodingError, ImageError, ImageFormatHint, ImageResult, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{ImageDecoder, ImageFormat}; - -/// Errors that can occur during decoding and parsing a DDS image -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum DecoderError { - /// Wrong DDS channel width - PixelFormatSizeInvalid(u32), - /// Wrong DDS header size - HeaderSizeInvalid(u32), - /// Wrong DDS header flags - HeaderFlagsInvalid(u32), - - /// Invalid DXGI format in DX10 header - DxgiFormatInvalid(u32), - /// Invalid resource dimension - ResourceDimensionInvalid(u32), - /// Invalid flags in DX10 header - Dx10FlagsInvalid(u32), - /// Invalid array size in DX10 header - Dx10ArraySizeInvalid(u32), - - /// DDS "DDS " signature invalid or missing - DdsSignatureInvalid, -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::PixelFormatSizeInvalid(s) => { - f.write_fmt(format_args!("Invalid DDS PixelFormat size: {}", s)) - } - DecoderError::HeaderSizeInvalid(s) => { - f.write_fmt(format_args!("Invalid DDS header size: {}", s)) - } - DecoderError::HeaderFlagsInvalid(fs) => { - f.write_fmt(format_args!("Invalid DDS header flags: {:#010X}", fs)) - } - DecoderError::DxgiFormatInvalid(df) => { - f.write_fmt(format_args!("Invalid DDS DXGI format: {}", df)) - } - DecoderError::ResourceDimensionInvalid(d) => { - f.write_fmt(format_args!("Invalid DDS resource dimension: {}", d)) - } - DecoderError::Dx10FlagsInvalid(fs) => { - f.write_fmt(format_args!("Invalid DDS DX10 header flags: {:#010X}", fs)) - } - DecoderError::Dx10ArraySizeInvalid(s) => { - f.write_fmt(format_args!("Invalid DDS DX10 array size: {}", s)) - } - DecoderError::DdsSignatureInvalid => f.write_str("DDS signature not found"), - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::Dds.into(), e)) - } -} - -impl error::Error for DecoderError {} - -/// Header used by DDS image files -#[derive(Debug)] -struct Header { - _flags: u32, - height: u32, - width: u32, - _pitch_or_linear_size: u32, - _depth: u32, - _mipmap_count: u32, - pixel_format: PixelFormat, - _caps: u32, - _caps2: u32, -} - -/// Extended DX10 header used by some DDS image files -#[derive(Debug)] -struct DX10Header { - dxgi_format: u32, - resource_dimension: u32, - misc_flag: u32, - array_size: u32, - misc_flags_2: u32, -} - -/// DDS pixel format -#[derive(Debug)] -struct PixelFormat { - flags: u32, - fourcc: [u8; 4], - _rgb_bit_count: u32, - _r_bit_mask: u32, - _g_bit_mask: u32, - _b_bit_mask: u32, - _a_bit_mask: u32, -} - -impl PixelFormat { - fn from_reader(r: &mut dyn Read) -> ImageResult<Self> { - let size = r.read_u32::<LittleEndian>()?; - if size != 32 { - return Err(DecoderError::PixelFormatSizeInvalid(size).into()); - } - - Ok(Self { - flags: r.read_u32::<LittleEndian>()?, - fourcc: { - let mut v = [0; 4]; - r.read_exact(&mut v)?; - v - }, - _rgb_bit_count: r.read_u32::<LittleEndian>()?, - _r_bit_mask: r.read_u32::<LittleEndian>()?, - _g_bit_mask: r.read_u32::<LittleEndian>()?, - _b_bit_mask: r.read_u32::<LittleEndian>()?, - _a_bit_mask: r.read_u32::<LittleEndian>()?, - }) - } -} - -impl Header { - fn from_reader(r: &mut dyn Read) -> ImageResult<Self> { - let size = r.read_u32::<LittleEndian>()?; - if size != 124 { - return Err(DecoderError::HeaderSizeInvalid(size).into()); - } - - const REQUIRED_FLAGS: u32 = 0x1 | 0x2 | 0x4 | 0x1000; - const VALID_FLAGS: u32 = 0x1 | 0x2 | 0x4 | 0x8 | 0x1000 | 0x20000 | 0x80000 | 0x800000; - let flags = r.read_u32::<LittleEndian>()?; - if flags & (REQUIRED_FLAGS | !VALID_FLAGS) != REQUIRED_FLAGS { - return Err(DecoderError::HeaderFlagsInvalid(flags).into()); - } - - let height = r.read_u32::<LittleEndian>()?; - let width = r.read_u32::<LittleEndian>()?; - let pitch_or_linear_size = r.read_u32::<LittleEndian>()?; - let depth = r.read_u32::<LittleEndian>()?; - let mipmap_count = r.read_u32::<LittleEndian>()?; - // Skip `dwReserved1` - { - let mut skipped = [0; 4 * 11]; - r.read_exact(&mut skipped)?; - } - let pixel_format = PixelFormat::from_reader(r)?; - let caps = r.read_u32::<LittleEndian>()?; - let caps2 = r.read_u32::<LittleEndian>()?; - // Skip `dwCaps3`, `dwCaps4`, `dwReserved2` (unused) - { - let mut skipped = [0; 4 + 4 + 4]; - r.read_exact(&mut skipped)?; - } - - Ok(Self { - _flags: flags, - height, - width, - _pitch_or_linear_size: pitch_or_linear_size, - _depth: depth, - _mipmap_count: mipmap_count, - pixel_format, - _caps: caps, - _caps2: caps2, - }) - } -} - -impl DX10Header { - fn from_reader(r: &mut dyn Read) -> ImageResult<Self> { - let dxgi_format = r.read_u32::<LittleEndian>()?; - let resource_dimension = r.read_u32::<LittleEndian>()?; - let misc_flag = r.read_u32::<LittleEndian>()?; - let array_size = r.read_u32::<LittleEndian>()?; - let misc_flags_2 = r.read_u32::<LittleEndian>()?; - - let dx10_header = Self { - dxgi_format, - resource_dimension, - misc_flag, - array_size, - misc_flags_2, - }; - dx10_header.validate()?; - - Ok(dx10_header) - } - - fn validate(&self) -> Result<(), ImageError> { - // Note: see https://docs.microsoft.com/en-us/windows/win32/direct3ddds/dds-header-dxt10 for info on valid values - if self.dxgi_format > 132 { - // Invalid format - return Err(DecoderError::DxgiFormatInvalid(self.dxgi_format).into()); - } - - if self.resource_dimension < 2 || self.resource_dimension > 4 { - // Invalid dimension - // Only 1D (2), 2D (3) and 3D (4) resource dimensions are allowed - return Err(DecoderError::ResourceDimensionInvalid(self.resource_dimension).into()); - } - - if self.misc_flag != 0x0 && self.misc_flag != 0x4 { - // Invalid flag - // Only no (0x0) and DDS_RESOURCE_MISC_TEXTURECUBE (0x4) flags are allowed - return Err(DecoderError::Dx10FlagsInvalid(self.misc_flag).into()); - } - - if self.resource_dimension == 4 && self.array_size != 1 { - // Invalid array size - // 3D textures (resource dimension == 4) must have an array size of 1 - return Err(DecoderError::Dx10ArraySizeInvalid(self.array_size).into()); - } - - if self.misc_flags_2 > 0x4 { - // Invalid alpha flags - return Err(DecoderError::Dx10FlagsInvalid(self.misc_flags_2).into()); - } - - Ok(()) - } -} - -/// The representation of a DDS decoder -pub struct DdsDecoder<R: Read> { - #[allow(deprecated)] - inner: DxtDecoder<R>, -} - -impl<R: Read> DdsDecoder<R> { - /// Create a new decoder that decodes from the stream `r` - pub fn new(mut r: R) -> ImageResult<Self> { - let mut magic = [0; 4]; - r.read_exact(&mut magic)?; - if magic != b"DDS "[..] { - return Err(DecoderError::DdsSignatureInvalid.into()); - } - - let header = Header::from_reader(&mut r)?; - - if header.pixel_format.flags & 0x4 != 0 { - #[allow(deprecated)] - let variant = match &header.pixel_format.fourcc { - b"DXT1" => DxtVariant::DXT1, - b"DXT3" => DxtVariant::DXT3, - b"DXT5" => DxtVariant::DXT5, - b"DX10" => { - let dx10_header = DX10Header::from_reader(&mut r)?; - // Format equivalents were taken from https://docs.microsoft.com/en-us/windows/win32/direct3d11/texture-block-compression-in-direct3d-11 - // The enum integer values were taken from https://docs.microsoft.com/en-us/windows/win32/api/dxgiformat/ne-dxgiformat-dxgi_format - // DXT1 represents the different BC1 variants, DTX3 represents the different BC2 variants and DTX5 represents the different BC3 variants - match dx10_header.dxgi_format { - 70 | 71 | 72 => DxtVariant::DXT1, // DXGI_FORMAT_BC1_TYPELESS, DXGI_FORMAT_BC1_UNORM or DXGI_FORMAT_BC1_UNORM_SRGB - 73 | 74 | 75 => DxtVariant::DXT3, // DXGI_FORMAT_BC2_TYPELESS, DXGI_FORMAT_BC2_UNORM or DXGI_FORMAT_BC2_UNORM_SRGB - 76 | 77 | 78 => DxtVariant::DXT5, // DXGI_FORMAT_BC3_TYPELESS, DXGI_FORMAT_BC3_UNORM or DXGI_FORMAT_BC3_UNORM_SRGB - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Dds.into(), - UnsupportedErrorKind::GenericFeature(format!( - "DDS DXGI Format {}", - dx10_header.dxgi_format - )), - ), - )) - } - } - } - fourcc => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Dds.into(), - UnsupportedErrorKind::GenericFeature(format!( - "DDS FourCC {:?}", - fourcc - )), - ), - )) - } - }; - - #[allow(deprecated)] - let bytes_per_pixel = variant.color_type().bytes_per_pixel(); - - if crate::utils::check_dimension_overflow(header.width, header.height, bytes_per_pixel) - { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Dds.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Image dimensions ({}x{}) are too large", - header.width, header.height - )), - ), - )); - } - - #[allow(deprecated)] - let inner = DxtDecoder::new(r, header.width, header.height, variant)?; - Ok(Self { inner }) - } else { - // For now, supports only DXT variants - Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Dds.into(), - UnsupportedErrorKind::Format(ImageFormatHint::Name("DDS".to_string())), - ), - )) - } - } -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for DdsDecoder<R> { - #[allow(deprecated)] - type Reader = DxtReader<R>; - - fn dimensions(&self) -> (u32, u32) { - self.inner.dimensions() - } - - fn color_type(&self) -> ColorType { - self.inner.color_type() - } - - fn scanline_bytes(&self) -> u64 { - self.inner.scanline_bytes() - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - self.inner.into_reader() - } - - fn read_image(self, buf: &mut [u8]) -> ImageResult<()> { - self.inner.read_image(buf) - } -} - -#[cfg(test)] -mod test { - use super::*; - - #[test] - fn dimension_overflow() { - // A DXT1 header set to 0xFFFF_FFFC width and height (the highest u32%4 == 0) - let header = vec![ - 0x44, 0x44, 0x53, 0x20, 0x7C, 0x0, 0x0, 0x0, 0x7, 0x10, 0x8, 0x0, 0xFC, 0xFF, 0xFF, - 0xFF, 0xFC, 0xFF, 0xFF, 0xFF, 0x0, 0xC0, 0x12, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, - 0x0, 0x49, 0x4D, 0x41, 0x47, 0x45, 0x4D, 0x41, 0x47, 0x49, 0x43, 0x4B, 0x0, 0x0, 0x0, - 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, - 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0, - 0x4, 0x0, 0x0, 0x0, 0x44, 0x58, 0x54, 0x31, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, - 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, - 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, - ]; - - assert!(DdsDecoder::new(&header[..]).is_err()); - } -} diff --git a/vendor/image/src/codecs/dxt.rs b/vendor/image/src/codecs/dxt.rs deleted file mode 100644 index 8737fb3..0000000 --- a/vendor/image/src/codecs/dxt.rs +++ /dev/null @@ -1,869 +0,0 @@ -//! Decoding of DXT (S3TC) compression -//! -//! DXT is an image format that supports lossy compression -//! -//! # Related Links -//! * <https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_texture_compression_s3tc.txt> - Description of the DXT compression OpenGL extensions. -//! -//! Note: this module only implements bare DXT encoding/decoding, it does not parse formats that can contain DXT files like .dds - -use std::convert::TryFrom; -use std::io::{self, Read, Seek, SeekFrom, Write}; - -use crate::color::ColorType; -use crate::error::{ImageError, ImageResult, ParameterError, ParameterErrorKind}; -use crate::image::{self, ImageDecoder, ImageDecoderRect, ImageReadBuffer, Progress}; - -/// What version of DXT compression are we using? -/// Note that DXT2 and DXT4 are left away as they're -/// just DXT3 and DXT5 with premultiplied alpha -#[derive(Clone, Copy, Debug, PartialEq, Eq)] -pub enum DxtVariant { - /// The DXT1 format. 48 bytes of RGB data in a 4x4 pixel square is - /// compressed into an 8 byte block of DXT1 data - DXT1, - /// The DXT3 format. 64 bytes of RGBA data in a 4x4 pixel square is - /// compressed into a 16 byte block of DXT3 data - DXT3, - /// The DXT5 format. 64 bytes of RGBA data in a 4x4 pixel square is - /// compressed into a 16 byte block of DXT5 data - DXT5, -} - -impl DxtVariant { - /// Returns the amount of bytes of raw image data - /// that is encoded in a single DXTn block - fn decoded_bytes_per_block(self) -> usize { - match self { - DxtVariant::DXT1 => 48, - DxtVariant::DXT3 | DxtVariant::DXT5 => 64, - } - } - - /// Returns the amount of bytes per block of encoded DXTn data - fn encoded_bytes_per_block(self) -> usize { - match self { - DxtVariant::DXT1 => 8, - DxtVariant::DXT3 | DxtVariant::DXT5 => 16, - } - } - - /// Returns the color type that is stored in this DXT variant - pub fn color_type(self) -> ColorType { - match self { - DxtVariant::DXT1 => ColorType::Rgb8, - DxtVariant::DXT3 | DxtVariant::DXT5 => ColorType::Rgba8, - } - } -} - -/// DXT decoder -pub struct DxtDecoder<R: Read> { - inner: R, - width_blocks: u32, - height_blocks: u32, - variant: DxtVariant, - row: u32, -} - -impl<R: Read> DxtDecoder<R> { - /// Create a new DXT decoder that decodes from the stream ```r```. - /// As DXT is often stored as raw buffers with the width/height - /// somewhere else the width and height of the image need - /// to be passed in ```width``` and ```height```, as well as the - /// DXT variant in ```variant```. - /// width and height are required to be powers of 2 and at least 4. - /// otherwise an error will be returned - pub fn new( - r: R, - width: u32, - height: u32, - variant: DxtVariant, - ) -> Result<DxtDecoder<R>, ImageError> { - if width % 4 != 0 || height % 4 != 0 { - // TODO: this is actually a bit of a weird case. We could return `DecodingError` but - // it's not really the format that is wrong However, the encoder should surely return - // `EncodingError` so it would be the logical choice for symmetry. - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))); - } - let width_blocks = width / 4; - let height_blocks = height / 4; - Ok(DxtDecoder { - inner: r, - width_blocks, - height_blocks, - variant, - row: 0, - }) - } - - fn read_scanline(&mut self, buf: &mut [u8]) -> io::Result<usize> { - assert_eq!(u64::try_from(buf.len()), Ok(self.scanline_bytes())); - - let mut src = - vec![0u8; self.variant.encoded_bytes_per_block() * self.width_blocks as usize]; - self.inner.read_exact(&mut src)?; - match self.variant { - DxtVariant::DXT1 => decode_dxt1_row(&src, buf), - DxtVariant::DXT3 => decode_dxt3_row(&src, buf), - DxtVariant::DXT5 => decode_dxt5_row(&src, buf), - } - self.row += 1; - Ok(buf.len()) - } -} - -// Note that, due to the way that DXT compression works, a scanline is considered to consist out of -// 4 lines of pixels. -impl<'a, R: 'a + Read> ImageDecoder<'a> for DxtDecoder<R> { - type Reader = DxtReader<R>; - - fn dimensions(&self) -> (u32, u32) { - (self.width_blocks * 4, self.height_blocks * 4) - } - - fn color_type(&self) -> ColorType { - self.variant.color_type() - } - - fn scanline_bytes(&self) -> u64 { - self.variant.decoded_bytes_per_block() as u64 * u64::from(self.width_blocks) - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(DxtReader { - buffer: ImageReadBuffer::new(self.scanline_bytes(), self.total_bytes()), - decoder: self, - }) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - - for chunk in buf.chunks_mut(self.scanline_bytes().max(1) as usize) { - self.read_scanline(chunk)?; - } - Ok(()) - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoderRect<'a> for DxtDecoder<R> { - fn read_rect_with_progress<F: Fn(Progress)>( - &mut self, - x: u32, - y: u32, - width: u32, - height: u32, - buf: &mut [u8], - progress_callback: F, - ) -> ImageResult<()> { - let encoded_scanline_bytes = - self.variant.encoded_bytes_per_block() as u64 * u64::from(self.width_blocks); - - let start = self.inner.stream_position()?; - image::load_rect( - x, - y, - width, - height, - buf, - progress_callback, - self, - |s, scanline| { - s.inner - .seek(SeekFrom::Start(start + scanline * encoded_scanline_bytes))?; - Ok(()) - }, - |s, buf| s.read_scanline(buf).map(|_| ()), - )?; - self.inner.seek(SeekFrom::Start(start))?; - Ok(()) - } -} - -/// DXT reader -pub struct DxtReader<R: Read> { - buffer: ImageReadBuffer, - decoder: DxtDecoder<R>, -} - -impl<R: Read> Read for DxtReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - let decoder = &mut self.decoder; - self.buffer.read(buf, |buf| decoder.read_scanline(buf)) - } -} - -/// DXT encoder -pub struct DxtEncoder<W: Write> { - w: W, -} - -impl<W: Write> DxtEncoder<W> { - /// Create a new encoder that writes its output to ```w``` - pub fn new(w: W) -> DxtEncoder<W> { - DxtEncoder { w } - } - - /// Encodes the image data ```data``` - /// that has dimensions ```width``` and ```height``` - /// in ```DxtVariant``` ```variant``` - /// data is assumed to be in variant.color_type() - pub fn encode( - mut self, - data: &[u8], - width: u32, - height: u32, - variant: DxtVariant, - ) -> ImageResult<()> { - if width % 4 != 0 || height % 4 != 0 { - // TODO: this is not very idiomatic yet. Should return an EncodingError. - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))); - } - let width_blocks = width / 4; - let height_blocks = height / 4; - - let stride = variant.decoded_bytes_per_block(); - - assert!(data.len() >= width_blocks as usize * height_blocks as usize * stride); - - for chunk in data.chunks(width_blocks as usize * stride) { - let data = match variant { - DxtVariant::DXT1 => encode_dxt1_row(chunk), - DxtVariant::DXT3 => encode_dxt3_row(chunk), - DxtVariant::DXT5 => encode_dxt5_row(chunk), - }; - self.w.write_all(&data)?; - } - Ok(()) - } -} - -/** - * Actual encoding/decoding logic below. - */ -use std::mem::swap; - -type Rgb = [u8; 3]; - -/// decodes a 5-bit R, 6-bit G, 5-bit B 16-bit packed color value into 8-bit RGB -/// mapping is done so min/max range values are preserved. So for 5-bit -/// values 0x00 -> 0x00 and 0x1F -> 0xFF -fn enc565_decode(value: u16) -> Rgb { - let red = (value >> 11) & 0x1F; - let green = (value >> 5) & 0x3F; - let blue = (value) & 0x1F; - [ - (red * 0xFF / 0x1F) as u8, - (green * 0xFF / 0x3F) as u8, - (blue * 0xFF / 0x1F) as u8, - ] -} - -/// encodes an 8-bit RGB value into a 5-bit R, 6-bit G, 5-bit B 16-bit packed color value -/// mapping preserves min/max values. It is guaranteed that i == encode(decode(i)) for all i -fn enc565_encode(rgb: Rgb) -> u16 { - let red = (u16::from(rgb[0]) * 0x1F + 0x7E) / 0xFF; - let green = (u16::from(rgb[1]) * 0x3F + 0x7E) / 0xFF; - let blue = (u16::from(rgb[2]) * 0x1F + 0x7E) / 0xFF; - (red << 11) | (green << 5) | blue -} - -/// utility function: squares a value -fn square(a: i32) -> i32 { - a * a -} - -/// returns the squared error between two RGB values -fn diff(a: Rgb, b: Rgb) -> i32 { - square(i32::from(a[0]) - i32::from(b[0])) - + square(i32::from(a[1]) - i32::from(b[1])) - + square(i32::from(a[2]) - i32::from(b[2])) -} - -/* - * Functions for decoding DXT compression - */ - -/// Constructs the DXT5 alpha lookup table from the two alpha entries -/// if alpha0 > alpha1, constructs a table of [a0, a1, 6 linearly interpolated values from a0 to a1] -/// if alpha0 <= alpha1, constructs a table of [a0, a1, 4 linearly interpolated values from a0 to a1, 0, 0xFF] -fn alpha_table_dxt5(alpha0: u8, alpha1: u8) -> [u8; 8] { - let mut table = [alpha0, alpha1, 0, 0, 0, 0, 0, 0xFF]; - if alpha0 > alpha1 { - for i in 2..8u16 { - table[i as usize] = - (((8 - i) * u16::from(alpha0) + (i - 1) * u16::from(alpha1)) / 7) as u8; - } - } else { - for i in 2..6u16 { - table[i as usize] = - (((6 - i) * u16::from(alpha0) + (i - 1) * u16::from(alpha1)) / 5) as u8; - } - } - table -} - -/// decodes an 8-byte dxt color block into the RGB channels of a 16xRGB or 16xRGBA block. -/// source should have a length of 8, dest a length of 48 (RGB) or 64 (RGBA) -fn decode_dxt_colors(source: &[u8], dest: &mut [u8], is_dxt1: bool) { - // sanity checks, also enable the compiler to elide all following bound checks - assert!(source.len() == 8 && (dest.len() == 48 || dest.len() == 64)); - // calculate pitch to store RGB values in dest (3 for RGB, 4 for RGBA) - let pitch = dest.len() / 16; - - // extract color data - let color0 = u16::from(source[0]) | (u16::from(source[1]) << 8); - let color1 = u16::from(source[2]) | (u16::from(source[3]) << 8); - let color_table = u32::from(source[4]) - | (u32::from(source[5]) << 8) - | (u32::from(source[6]) << 16) - | (u32::from(source[7]) << 24); - // let color_table = source[4..8].iter().rev().fold(0, |t, &b| (t << 8) | b as u32); - - // decode the colors to rgb format - let mut colors = [[0; 3]; 4]; - colors[0] = enc565_decode(color0); - colors[1] = enc565_decode(color1); - - // determine color interpolation method - if color0 > color1 || !is_dxt1 { - // linearly interpolate the other two color table entries - for i in 0..3 { - colors[2][i] = ((u16::from(colors[0][i]) * 2 + u16::from(colors[1][i]) + 1) / 3) as u8; - colors[3][i] = ((u16::from(colors[0][i]) + u16::from(colors[1][i]) * 2 + 1) / 3) as u8; - } - } else { - // linearly interpolate one other entry, keep the other at 0 - for i in 0..3 { - colors[2][i] = ((u16::from(colors[0][i]) + u16::from(colors[1][i]) + 1) / 2) as u8; - } - } - - // serialize the result. Every color is determined by looking up - // two bits in color_table which identify which color to actually pick from the 4 possible colors - for i in 0..16 { - dest[i * pitch..i * pitch + 3] - .copy_from_slice(&colors[(color_table >> (i * 2)) as usize & 3]); - } -} - -/// Decodes a 16-byte bock of dxt5 data to a 16xRGBA block -fn decode_dxt5_block(source: &[u8], dest: &mut [u8]) { - assert!(source.len() == 16 && dest.len() == 64); - - // extract alpha index table (stored as little endian 64-bit value) - let alpha_table = source[2..8] - .iter() - .rev() - .fold(0, |t, &b| (t << 8) | u64::from(b)); - - // alhpa level decode - let alphas = alpha_table_dxt5(source[0], source[1]); - - // serialize alpha - for i in 0..16 { - dest[i * 4 + 3] = alphas[(alpha_table >> (i * 3)) as usize & 7]; - } - - // handle colors - decode_dxt_colors(&source[8..16], dest, false); -} - -/// Decodes a 16-byte bock of dxt3 data to a 16xRGBA block -fn decode_dxt3_block(source: &[u8], dest: &mut [u8]) { - assert!(source.len() == 16 && dest.len() == 64); - - // extract alpha index table (stored as little endian 64-bit value) - let alpha_table = source[0..8] - .iter() - .rev() - .fold(0, |t, &b| (t << 8) | u64::from(b)); - - // serialize alpha (stored as 4-bit values) - for i in 0..16 { - dest[i * 4 + 3] = ((alpha_table >> (i * 4)) as u8 & 0xF) * 0x11; - } - - // handle colors - decode_dxt_colors(&source[8..16], dest, false); -} - -/// Decodes a 8-byte bock of dxt5 data to a 16xRGB block -fn decode_dxt1_block(source: &[u8], dest: &mut [u8]) { - assert!(source.len() == 8 && dest.len() == 48); - decode_dxt_colors(source, dest, true); -} - -/// Decode a row of DXT1 data to four rows of RGB data. -/// source.len() should be a multiple of 8, otherwise this panics. -fn decode_dxt1_row(source: &[u8], dest: &mut [u8]) { - assert!(source.len() % 8 == 0); - let block_count = source.len() / 8; - assert!(dest.len() >= block_count * 48); - - // contains the 16 decoded pixels per block - let mut decoded_block = [0u8; 48]; - - for (x, encoded_block) in source.chunks(8).enumerate() { - decode_dxt1_block(encoded_block, &mut decoded_block); - - // copy the values from the decoded block to linewise RGB layout - for line in 0..4 { - let offset = (block_count * line + x) * 12; - dest[offset..offset + 12].copy_from_slice(&decoded_block[line * 12..(line + 1) * 12]); - } - } -} - -/// Decode a row of DXT3 data to four rows of RGBA data. -/// source.len() should be a multiple of 16, otherwise this panics. -fn decode_dxt3_row(source: &[u8], dest: &mut [u8]) { - assert!(source.len() % 16 == 0); - let block_count = source.len() / 16; - assert!(dest.len() >= block_count * 64); - - // contains the 16 decoded pixels per block - let mut decoded_block = [0u8; 64]; - - for (x, encoded_block) in source.chunks(16).enumerate() { - decode_dxt3_block(encoded_block, &mut decoded_block); - - // copy the values from the decoded block to linewise RGB layout - for line in 0..4 { - let offset = (block_count * line + x) * 16; - dest[offset..offset + 16].copy_from_slice(&decoded_block[line * 16..(line + 1) * 16]); - } - } -} - -/// Decode a row of DXT5 data to four rows of RGBA data. -/// source.len() should be a multiple of 16, otherwise this panics. -fn decode_dxt5_row(source: &[u8], dest: &mut [u8]) { - assert!(source.len() % 16 == 0); - let block_count = source.len() / 16; - assert!(dest.len() >= block_count * 64); - - // contains the 16 decoded pixels per block - let mut decoded_block = [0u8; 64]; - - for (x, encoded_block) in source.chunks(16).enumerate() { - decode_dxt5_block(encoded_block, &mut decoded_block); - - // copy the values from the decoded block to linewise RGB layout - for line in 0..4 { - let offset = (block_count * line + x) * 16; - dest[offset..offset + 16].copy_from_slice(&decoded_block[line * 16..(line + 1) * 16]); - } - } -} - -/* - * Functions for encoding DXT compression - */ - -/// Tries to perform the color encoding part of dxt compression -/// the approach taken is simple, it picks unique combinations -/// of the colors present in the block, and attempts to encode the -/// block with each, picking the encoding that yields the least -/// squared error out of all of them. -/// -/// This could probably be faster but is already reasonably fast -/// and a good reference impl to optimize others against. -/// -/// Another way to perform this analysis would be to perform a -/// singular value decomposition of the different colors, and -/// then pick 2 points on this line as the base colors. But -/// this is still rather unwieldy math and has issues -/// with the 3-linear-colors-and-0 case, it's also worse -/// at conserving the original colors. -/// -/// source: should be RGBAx16 or RGBx16 bytes of data, -/// dest 8 bytes of resulting encoded color data -fn encode_dxt_colors(source: &[u8], dest: &mut [u8], is_dxt1: bool) { - // sanity checks and determine stride when parsing the source data - assert!((source.len() == 64 || source.len() == 48) && dest.len() == 8); - let stride = source.len() / 16; - - // reference colors array - let mut colors = [[0u8; 3]; 4]; - - // Put the colors we're going to be processing in an array with pure RGB layout - // note: we reverse the pixel order here. The reason for this is found in the inner quantization loop. - let mut targets = [[0u8; 3]; 16]; - for (s, d) in source.chunks(stride).rev().zip(&mut targets) { - *d = [s[0], s[1], s[2]]; - } - - // roundtrip all colors through the r5g6b5 encoding - for rgb in &mut targets { - *rgb = enc565_decode(enc565_encode(*rgb)); - } - - // and deduplicate the set of colors to choose from as the algorithm is O(N^2) in this - let mut colorspace_ = [[0u8; 3]; 16]; - let mut colorspace_len = 0; - for color in &targets { - if !colorspace_[..colorspace_len].contains(color) { - colorspace_[colorspace_len] = *color; - colorspace_len += 1; - } - } - let mut colorspace = &colorspace_[..colorspace_len]; - - // in case of slight gradients it can happen that there's only one entry left in the color table. - // as the resulting banding can be quite bad if we would just left the block at the closest - // encodable color, we have a special path here that tries to emulate the wanted color - // using the linear interpolation between gradients - if colorspace.len() == 1 { - // the base color we got from colorspace reduction - let ref_rgb = colorspace[0]; - // the unreduced color in this block that's the furthest away from the actual block - let mut rgb = targets - .iter() - .cloned() - .max_by_key(|rgb| diff(*rgb, ref_rgb)) - .unwrap(); - // amplify differences by 2.5, which should push them to the next quantized value - // if possible without overshoot - for i in 0..3 { - rgb[i] = - ((i16::from(rgb[i]) - i16::from(ref_rgb[i])) * 5 / 2 + i16::from(ref_rgb[i])) as u8; - } - - // roundtrip it through quantization - let encoded = enc565_encode(rgb); - let rgb = enc565_decode(encoded); - - // in case this didn't land us a different color the best way to represent this field is - // as a single color block - if rgb == ref_rgb { - dest[0] = encoded as u8; - dest[1] = (encoded >> 8) as u8; - - for d in dest.iter_mut().take(8).skip(2) { - *d = 0; - } - return; - } - - // we did find a separate value: add it to the options so after one round of quantization - // we're done - colorspace_[1] = rgb; - colorspace = &colorspace_[..2]; - } - - // block quantization loop: we basically just try every possible combination, returning - // the combination with the least squared error - // stores the best candidate colors - let mut chosen_colors = [[0; 3]; 4]; - // did this index table use the [0,0,0] variant - let mut chosen_use_0 = false; - // error calculated for the last entry - let mut chosen_error = 0xFFFF_FFFFu32; - - // loop through unique permutations of the colorspace, where c1 != c2 - 'search: for (i, &c1) in colorspace.iter().enumerate() { - colors[0] = c1; - - for &c2 in &colorspace[0..i] { - colors[1] = c2; - - if is_dxt1 { - // what's inside here is ran at most 120 times. - for use_0 in 0..2 { - // and 240 times here. - - if use_0 != 0 { - // interpolate one color, set the other to 0 - for i in 0..3 { - colors[2][i] = - ((u16::from(colors[0][i]) + u16::from(colors[1][i]) + 1) / 2) as u8; - } - colors[3] = [0, 0, 0]; - } else { - // interpolate to get 2 more colors - for i in 0..3 { - colors[2][i] = - ((u16::from(colors[0][i]) * 2 + u16::from(colors[1][i]) + 1) / 3) - as u8; - colors[3][i] = - ((u16::from(colors[0][i]) + u16::from(colors[1][i]) * 2 + 1) / 3) - as u8; - } - } - - // calculate the total error if we were to quantize the block with these color combinations - // both these loops have statically known iteration counts and are well vectorizable - // note that the inside of this can be run about 15360 times worst case, i.e. 960 times per - // pixel. - let total_error = targets - .iter() - .map(|t| colors.iter().map(|c| diff(*c, *t) as u32).min().unwrap()) - .sum(); - - // update the match if we found a better one - if total_error < chosen_error { - chosen_colors = colors; - chosen_use_0 = use_0 != 0; - chosen_error = total_error; - - // if we've got a perfect or at most 1 LSB off match, we're done - if total_error < 4 { - break 'search; - } - } - } - } else { - // what's inside here is ran at most 120 times. - - // interpolate to get 2 more colors - for i in 0..3 { - colors[2][i] = - ((u16::from(colors[0][i]) * 2 + u16::from(colors[1][i]) + 1) / 3) as u8; - colors[3][i] = - ((u16::from(colors[0][i]) + u16::from(colors[1][i]) * 2 + 1) / 3) as u8; - } - - // calculate the total error if we were to quantize the block with these color combinations - // both these loops have statically known iteration counts and are well vectorizable - // note that the inside of this can be run about 15360 times worst case, i.e. 960 times per - // pixel. - let total_error = targets - .iter() - .map(|t| colors.iter().map(|c| diff(*c, *t) as u32).min().unwrap()) - .sum(); - - // update the match if we found a better one - if total_error < chosen_error { - chosen_colors = colors; - chosen_error = total_error; - - // if we've got a perfect or at most 1 LSB off match, we're done - if total_error < 4 { - break 'search; - } - } - } - } - } - - // calculate the final indices - // note that targets is already in reverse pixel order, to make the index computation easy. - let mut chosen_indices = 0u32; - for t in &targets { - let (idx, _) = chosen_colors - .iter() - .enumerate() - .min_by_key(|&(_, c)| diff(*c, *t)) - .unwrap(); - chosen_indices = (chosen_indices << 2) | idx as u32; - } - - // encode the colors - let mut color0 = enc565_encode(chosen_colors[0]); - let mut color1 = enc565_encode(chosen_colors[1]); - - // determine encoding. Note that color0 == color1 is impossible at this point - if is_dxt1 { - if color0 > color1 { - if chosen_use_0 { - swap(&mut color0, &mut color1); - // Indexes are packed 2 bits wide, swap index 0/1 but preserve 2/3. - let filter = (chosen_indices & 0xAAAA_AAAA) >> 1; - chosen_indices ^= filter ^ 0x5555_5555; - } - } else if !chosen_use_0 { - swap(&mut color0, &mut color1); - // Indexes are packed 2 bits wide, swap index 0/1 and 2/3. - chosen_indices ^= 0x5555_5555; - } - } - - // encode everything. - dest[0] = color0 as u8; - dest[1] = (color0 >> 8) as u8; - dest[2] = color1 as u8; - dest[3] = (color1 >> 8) as u8; - for i in 0..4 { - dest[i + 4] = (chosen_indices >> (i * 8)) as u8; - } -} - -/// Encodes a buffer of 16 alpha bytes into a dxt5 alpha index table, -/// where the alpha table they are indexed against is created by -/// calling alpha_table_dxt5(alpha0, alpha1) -/// returns the resulting error and alpha table -fn encode_dxt5_alpha(alpha0: u8, alpha1: u8, alphas: &[u8; 16]) -> (i32, u64) { - // create a table for the given alpha ranges - let table = alpha_table_dxt5(alpha0, alpha1); - let mut indices = 0u64; - let mut total_error = 0i32; - - // least error brute force search - for (i, &a) in alphas.iter().enumerate() { - let (index, error) = table - .iter() - .enumerate() - .map(|(i, &e)| (i, square(i32::from(e) - i32::from(a)))) - .min_by_key(|&(_, e)| e) - .unwrap(); - total_error += error; - indices |= (index as u64) << (i * 3); - } - - (total_error, indices) -} - -/// Encodes a RGBAx16 sequence of bytes to a 16 bytes DXT5 block -fn encode_dxt5_block(source: &[u8], dest: &mut [u8]) { - assert!(source.len() == 64 && dest.len() == 16); - - // perform dxt color encoding - encode_dxt_colors(source, &mut dest[8..16], false); - - // copy out the alpha bytes - let mut alphas = [0; 16]; - for i in 0..16 { - alphas[i] = source[i * 4 + 3]; - } - - // try both alpha compression methods, see which has the least error. - let alpha07 = alphas.iter().cloned().min().unwrap(); - let alpha17 = alphas.iter().cloned().max().unwrap(); - let (error7, indices7) = encode_dxt5_alpha(alpha07, alpha17, &alphas); - - // if all alphas are 0 or 255 it doesn't particularly matter what we do here. - let alpha05 = alphas - .iter() - .cloned() - .filter(|&i| i != 255) - .max() - .unwrap_or(255); - let alpha15 = alphas - .iter() - .cloned() - .filter(|&i| i != 0) - .min() - .unwrap_or(0); - let (error5, indices5) = encode_dxt5_alpha(alpha05, alpha15, &alphas); - - // pick the best one, encode the min/max values - let mut alpha_table = if error5 < error7 { - dest[0] = alpha05; - dest[1] = alpha15; - indices5 - } else { - dest[0] = alpha07; - dest[1] = alpha17; - indices7 - }; - - // encode the alphas - for byte in dest[2..8].iter_mut() { - *byte = alpha_table as u8; - alpha_table >>= 8; - } -} - -/// Encodes a RGBAx16 sequence of bytes into a 16 bytes DXT3 block -fn encode_dxt3_block(source: &[u8], dest: &mut [u8]) { - assert!(source.len() == 64 && dest.len() == 16); - - // perform dxt color encoding - encode_dxt_colors(source, &mut dest[8..16], false); - - // DXT3 alpha compression is very simple, just round towards the nearest value - - // index the alpha values into the 64bit alpha table - let mut alpha_table = 0u64; - for i in 0..16 { - let alpha = u64::from(source[i * 4 + 3]); - let alpha = (alpha + 0x8) / 0x11; - alpha_table |= alpha << (i * 4); - } - - // encode the alpha values - for byte in &mut dest[0..8] { - *byte = alpha_table as u8; - alpha_table >>= 8; - } -} - -/// Encodes a RGBx16 sequence of bytes into a 8 bytes DXT1 block -fn encode_dxt1_block(source: &[u8], dest: &mut [u8]) { - assert!(source.len() == 48 && dest.len() == 8); - - // perform dxt color encoding - encode_dxt_colors(source, dest, true); -} - -/// Decode a row of DXT1 data to four rows of RGBA data. -/// source.len() should be a multiple of 8, otherwise this panics. -fn encode_dxt1_row(source: &[u8]) -> Vec<u8> { - assert!(source.len() % 48 == 0); - let block_count = source.len() / 48; - - let mut dest = vec![0u8; block_count * 8]; - // contains the 16 decoded pixels per block - let mut decoded_block = [0u8; 48]; - - for (x, encoded_block) in dest.chunks_mut(8).enumerate() { - // copy the values from the decoded block to linewise RGB layout - for line in 0..4 { - let offset = (block_count * line + x) * 12; - decoded_block[line * 12..(line + 1) * 12].copy_from_slice(&source[offset..offset + 12]); - } - - encode_dxt1_block(&decoded_block, encoded_block); - } - dest -} - -/// Decode a row of DXT3 data to four rows of RGBA data. -/// source.len() should be a multiple of 16, otherwise this panics. -fn encode_dxt3_row(source: &[u8]) -> Vec<u8> { - assert!(source.len() % 64 == 0); - let block_count = source.len() / 64; - - let mut dest = vec![0u8; block_count * 16]; - // contains the 16 decoded pixels per block - let mut decoded_block = [0u8; 64]; - - for (x, encoded_block) in dest.chunks_mut(16).enumerate() { - // copy the values from the decoded block to linewise RGB layout - for line in 0..4 { - let offset = (block_count * line + x) * 16; - decoded_block[line * 16..(line + 1) * 16].copy_from_slice(&source[offset..offset + 16]); - } - - encode_dxt3_block(&decoded_block, encoded_block); - } - dest -} - -/// Decode a row of DXT5 data to four rows of RGBA data. -/// source.len() should be a multiple of 16, otherwise this panics. -fn encode_dxt5_row(source: &[u8]) -> Vec<u8> { - assert!(source.len() % 64 == 0); - let block_count = source.len() / 64; - - let mut dest = vec![0u8; block_count * 16]; - // contains the 16 decoded pixels per block - let mut decoded_block = [0u8; 64]; - - for (x, encoded_block) in dest.chunks_mut(16).enumerate() { - // copy the values from the decoded block to linewise RGB layout - for line in 0..4 { - let offset = (block_count * line + x) * 16; - decoded_block[line * 16..(line + 1) * 16].copy_from_slice(&source[offset..offset + 16]); - } - - encode_dxt5_block(&decoded_block, encoded_block); - } - dest -} diff --git a/vendor/image/src/codecs/farbfeld.rs b/vendor/image/src/codecs/farbfeld.rs deleted file mode 100644 index b543ade..0000000 --- a/vendor/image/src/codecs/farbfeld.rs +++ /dev/null @@ -1,400 +0,0 @@ -//! Decoding of farbfeld images -//! -//! farbfeld is a lossless image format which is easy to parse, pipe and compress. -//! -//! It has the following format: -//! -//! | Bytes | Description | -//! |--------|---------------------------------------------------------| -//! | 8 | "farbfeld" magic value | -//! | 4 | 32-Bit BE unsigned integer (width) | -//! | 4 | 32-Bit BE unsigned integer (height) | -//! | [2222] | 4⋅16-Bit BE unsigned integers [RGBA] / pixel, row-major | -//! -//! The RGB-data should be sRGB for best interoperability and not alpha-premultiplied. -//! -//! # Related Links -//! * <https://tools.suckless.org/farbfeld/> - the farbfeld specification - -use std::convert::TryFrom; -use std::i64; -use std::io::{self, Read, Seek, SeekFrom, Write}; - -use byteorder::{BigEndian, ByteOrder, NativeEndian}; - -use crate::color::ColorType; -use crate::error::{ - DecodingError, ImageError, ImageResult, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{self, ImageDecoder, ImageDecoderRect, ImageEncoder, ImageFormat, Progress}; - -/// farbfeld Reader -pub struct FarbfeldReader<R: Read> { - width: u32, - height: u32, - inner: R, - /// Relative to the start of the pixel data - current_offset: u64, - cached_byte: Option<u8>, -} - -impl<R: Read> FarbfeldReader<R> { - fn new(mut buffered_read: R) -> ImageResult<FarbfeldReader<R>> { - fn read_dimm<R: Read>(from: &mut R) -> ImageResult<u32> { - let mut buf = [0u8; 4]; - from.read_exact(&mut buf).map_err(|err| { - ImageError::Decoding(DecodingError::new(ImageFormat::Farbfeld.into(), err)) - })?; - Ok(BigEndian::read_u32(&buf)) - } - - let mut magic = [0u8; 8]; - buffered_read.read_exact(&mut magic).map_err(|err| { - ImageError::Decoding(DecodingError::new(ImageFormat::Farbfeld.into(), err)) - })?; - if &magic != b"farbfeld" { - return Err(ImageError::Decoding(DecodingError::new( - ImageFormat::Farbfeld.into(), - format!("Invalid magic: {:02x?}", magic), - ))); - } - - let reader = FarbfeldReader { - width: read_dimm(&mut buffered_read)?, - height: read_dimm(&mut buffered_read)?, - inner: buffered_read, - current_offset: 0, - cached_byte: None, - }; - - if crate::utils::check_dimension_overflow( - reader.width, - reader.height, - // ColorType is always rgba16 - ColorType::Rgba16.bytes_per_pixel(), - ) { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Farbfeld.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Image dimensions ({}x{}) are too large", - reader.width, reader.height - )), - ), - )); - } - - Ok(reader) - } -} - -impl<R: Read> Read for FarbfeldReader<R> { - fn read(&mut self, mut buf: &mut [u8]) -> io::Result<usize> { - let mut bytes_written = 0; - if let Some(byte) = self.cached_byte.take() { - buf[0] = byte; - buf = &mut buf[1..]; - bytes_written = 1; - self.current_offset += 1; - } - - if buf.len() == 1 { - buf[0] = cache_byte(&mut self.inner, &mut self.cached_byte)?; - bytes_written += 1; - self.current_offset += 1; - } else { - for channel_out in buf.chunks_exact_mut(2) { - consume_channel(&mut self.inner, channel_out)?; - bytes_written += 2; - self.current_offset += 2; - } - } - - Ok(bytes_written) - } -} - -impl<R: Read + Seek> Seek for FarbfeldReader<R> { - fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> { - fn parse_offset(original_offset: u64, end_offset: u64, pos: SeekFrom) -> Option<i64> { - match pos { - SeekFrom::Start(off) => i64::try_from(off) - .ok()? - .checked_sub(i64::try_from(original_offset).ok()?), - SeekFrom::End(off) => { - if off < i64::try_from(end_offset).unwrap_or(i64::MAX) { - None - } else { - Some(i64::try_from(end_offset.checked_sub(original_offset)?).ok()? + off) - } - } - SeekFrom::Current(off) => { - if off < i64::try_from(original_offset).unwrap_or(i64::MAX) { - None - } else { - Some(off) - } - } - } - } - - let original_offset = self.current_offset; - let end_offset = self.width as u64 * self.height as u64 * 2; - let offset_from_current = - parse_offset(original_offset, end_offset, pos).ok_or_else(|| { - io::Error::new( - io::ErrorKind::InvalidInput, - "invalid seek to a negative or overflowing position", - ) - })?; - - // TODO: convert to seek_relative() once that gets stabilised - self.inner.seek(SeekFrom::Current(offset_from_current))?; - self.current_offset = if offset_from_current < 0 { - original_offset.checked_sub(offset_from_current.wrapping_neg() as u64) - } else { - original_offset.checked_add(offset_from_current as u64) - } - .expect("This should've been checked above"); - - if self.current_offset < end_offset && self.current_offset % 2 == 1 { - let curr = self.inner.seek(SeekFrom::Current(-1))?; - cache_byte(&mut self.inner, &mut self.cached_byte)?; - self.inner.seek(SeekFrom::Start(curr))?; - } else { - self.cached_byte = None; - } - - Ok(original_offset) - } -} - -fn consume_channel<R: Read>(from: &mut R, to: &mut [u8]) -> io::Result<()> { - let mut ibuf = [0u8; 2]; - from.read_exact(&mut ibuf)?; - NativeEndian::write_u16(to, BigEndian::read_u16(&ibuf)); - Ok(()) -} - -fn cache_byte<R: Read>(from: &mut R, cached_byte: &mut Option<u8>) -> io::Result<u8> { - let mut obuf = [0u8; 2]; - consume_channel(from, &mut obuf)?; - *cached_byte = Some(obuf[1]); - Ok(obuf[0]) -} - -/// farbfeld decoder -pub struct FarbfeldDecoder<R: Read> { - reader: FarbfeldReader<R>, -} - -impl<R: Read> FarbfeldDecoder<R> { - /// Creates a new decoder that decodes from the stream ```r``` - pub fn new(buffered_read: R) -> ImageResult<FarbfeldDecoder<R>> { - Ok(FarbfeldDecoder { - reader: FarbfeldReader::new(buffered_read)?, - }) - } -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for FarbfeldDecoder<R> { - type Reader = FarbfeldReader<R>; - - fn dimensions(&self) -> (u32, u32) { - (self.reader.width, self.reader.height) - } - - fn color_type(&self) -> ColorType { - ColorType::Rgba16 - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(self.reader) - } - - fn scanline_bytes(&self) -> u64 { - 2 - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoderRect<'a> for FarbfeldDecoder<R> { - fn read_rect_with_progress<F: Fn(Progress)>( - &mut self, - x: u32, - y: u32, - width: u32, - height: u32, - buf: &mut [u8], - progress_callback: F, - ) -> ImageResult<()> { - // A "scanline" (defined as "shortest non-caching read" in the doc) is just one channel in this case - - let start = self.reader.stream_position()?; - image::load_rect( - x, - y, - width, - height, - buf, - progress_callback, - self, - |s, scanline| s.reader.seek(SeekFrom::Start(scanline * 2)).map(|_| ()), - |s, buf| s.reader.read_exact(buf), - )?; - self.reader.seek(SeekFrom::Start(start))?; - Ok(()) - } -} - -/// farbfeld encoder -pub struct FarbfeldEncoder<W: Write> { - w: W, -} - -impl<W: Write> FarbfeldEncoder<W> { - /// Create a new encoder that writes its output to ```w```. The writer should be buffered. - pub fn new(buffered_writer: W) -> FarbfeldEncoder<W> { - FarbfeldEncoder { w: buffered_writer } - } - - /// Encodes the image ```data``` (native endian) - /// that has dimensions ```width``` and ```height``` - pub fn encode(self, data: &[u8], width: u32, height: u32) -> ImageResult<()> { - self.encode_impl(data, width, height)?; - Ok(()) - } - - fn encode_impl(mut self, data: &[u8], width: u32, height: u32) -> io::Result<()> { - self.w.write_all(b"farbfeld")?; - - let mut buf = [0u8; 4]; - BigEndian::write_u32(&mut buf, width); - self.w.write_all(&buf)?; - - BigEndian::write_u32(&mut buf, height); - self.w.write_all(&buf)?; - - for channel in data.chunks_exact(2) { - BigEndian::write_u16(&mut buf, NativeEndian::read_u16(channel)); - self.w.write_all(&buf[..2])?; - } - - Ok(()) - } -} - -impl<W: Write> ImageEncoder for FarbfeldEncoder<W> { - fn write_image( - self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - if color_type != ColorType::Rgba16 { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Farbfeld.into(), - UnsupportedErrorKind::Color(color_type.into()), - ), - )); - } - - self.encode(buf, width, height) - } -} - -#[cfg(test)] -mod tests { - use crate::codecs::farbfeld::FarbfeldDecoder; - use crate::ImageDecoderRect; - use byteorder::{ByteOrder, NativeEndian}; - use std::io::{Cursor, Seek, SeekFrom}; - - static RECTANGLE_IN: &[u8] = b"farbfeld\ - \x00\x00\x00\x02\x00\x00\x00\x03\ - \xFF\x01\xFE\x02\xFD\x03\xFC\x04\xFB\x05\xFA\x06\xF9\x07\xF8\x08\ - \xF7\x09\xF6\x0A\xF5\x0B\xF4\x0C\xF3\x0D\xF2\x0E\xF1\x0F\xF0\x10\ - \xEF\x11\xEE\x12\xED\x13\xEC\x14\xEB\x15\xEA\x16\xE9\x17\xE8\x18"; - - #[test] - fn read_rect_1x2() { - static RECTANGLE_OUT: &[u16] = &[ - 0xF30D, 0xF20E, 0xF10F, 0xF010, 0xEB15, 0xEA16, 0xE917, 0xE818, - ]; - - read_rect(1, 1, 1, 2, RECTANGLE_OUT); - } - - #[test] - fn read_rect_2x2() { - static RECTANGLE_OUT: &[u16] = &[ - 0xFF01, 0xFE02, 0xFD03, 0xFC04, 0xFB05, 0xFA06, 0xF907, 0xF808, 0xF709, 0xF60A, 0xF50B, - 0xF40C, 0xF30D, 0xF20E, 0xF10F, 0xF010, - ]; - - read_rect(0, 0, 2, 2, RECTANGLE_OUT); - } - - #[test] - fn read_rect_2x1() { - static RECTANGLE_OUT: &[u16] = &[ - 0xEF11, 0xEE12, 0xED13, 0xEC14, 0xEB15, 0xEA16, 0xE917, 0xE818, - ]; - - read_rect(0, 2, 2, 1, RECTANGLE_OUT); - } - - #[test] - fn read_rect_2x3() { - static RECTANGLE_OUT: &[u16] = &[ - 0xFF01, 0xFE02, 0xFD03, 0xFC04, 0xFB05, 0xFA06, 0xF907, 0xF808, 0xF709, 0xF60A, 0xF50B, - 0xF40C, 0xF30D, 0xF20E, 0xF10F, 0xF010, 0xEF11, 0xEE12, 0xED13, 0xEC14, 0xEB15, 0xEA16, - 0xE917, 0xE818, - ]; - - read_rect(0, 0, 2, 3, RECTANGLE_OUT); - } - - #[test] - fn read_rect_in_stream() { - static RECTANGLE_OUT: &[u16] = &[0xEF11, 0xEE12, 0xED13, 0xEC14]; - - let mut input = vec![]; - input.extend_from_slice(b"This is a 31-byte-long prologue"); - input.extend_from_slice(RECTANGLE_IN); - let mut input_cur = Cursor::new(input); - input_cur.seek(SeekFrom::Start(31)).unwrap(); - - let mut out_buf = [0u8; 64]; - FarbfeldDecoder::new(input_cur) - .unwrap() - .read_rect(0, 2, 1, 1, &mut out_buf) - .unwrap(); - let exp = degenerate_pixels(RECTANGLE_OUT); - assert_eq!(&out_buf[..exp.len()], &exp[..]); - } - - #[test] - fn dimension_overflow() { - let header = b"farbfeld\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF"; - - assert!(FarbfeldDecoder::new(Cursor::new(header)).is_err()); - } - - fn read_rect(x: u32, y: u32, width: u32, height: u32, exp_wide: &[u16]) { - let mut out_buf = [0u8; 64]; - FarbfeldDecoder::new(Cursor::new(RECTANGLE_IN)) - .unwrap() - .read_rect(x, y, width, height, &mut out_buf) - .unwrap(); - let exp = degenerate_pixels(exp_wide); - assert_eq!(&out_buf[..exp.len()], &exp[..]); - } - - fn degenerate_pixels(exp_wide: &[u16]) -> Vec<u8> { - let mut exp = vec![0u8; exp_wide.len() * 2]; - NativeEndian::write_u16_into(exp_wide, &mut exp); - exp - } -} diff --git a/vendor/image/src/codecs/gif.rs b/vendor/image/src/codecs/gif.rs deleted file mode 100644 index dcbd841..0000000 --- a/vendor/image/src/codecs/gif.rs +++ /dev/null @@ -1,606 +0,0 @@ -//! Decoding of GIF Images -//! -//! GIF (Graphics Interchange Format) is an image format that supports lossless compression. -//! -//! # Related Links -//! * <http://www.w3.org/Graphics/GIF/spec-gif89a.txt> - The GIF Specification -//! -//! # Examples -//! ```rust,no_run -//! use image::codecs::gif::{GifDecoder, GifEncoder}; -//! use image::{ImageDecoder, AnimationDecoder}; -//! use std::fs::File; -//! # fn main() -> std::io::Result<()> { -//! // Decode a gif into frames -//! let file_in = File::open("foo.gif")?; -//! let mut decoder = GifDecoder::new(file_in).unwrap(); -//! let frames = decoder.into_frames(); -//! let frames = frames.collect_frames().expect("error decoding gif"); -//! -//! // Encode frames into a gif and save to a file -//! let mut file_out = File::open("out.gif")?; -//! let mut encoder = GifEncoder::new(file_out); -//! encoder.encode_frames(frames.into_iter()); -//! # Ok(()) -//! # } -//! ``` -#![allow(clippy::while_let_loop)] - -use std::convert::TryFrom; -use std::convert::TryInto; -use std::io::{self, Cursor, Read, Write}; -use std::marker::PhantomData; -use std::mem; - -use gif::ColorOutput; -use gif::{DisposalMethod, Frame}; -use num_rational::Ratio; - -use crate::animation; -use crate::color::{ColorType, Rgba}; -use crate::error::{ - DecodingError, EncodingError, ImageError, ImageResult, ParameterError, ParameterErrorKind, - UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{self, AnimationDecoder, ImageDecoder, ImageFormat}; -use crate::io::Limits; -use crate::traits::Pixel; -use crate::ImageBuffer; - -/// GIF decoder -pub struct GifDecoder<R: Read> { - reader: gif::Decoder<R>, - limits: Limits, -} - -impl<R: Read> GifDecoder<R> { - /// Creates a new decoder that decodes the input steam `r` - pub fn new(r: R) -> ImageResult<GifDecoder<R>> { - let mut decoder = gif::DecodeOptions::new(); - decoder.set_color_output(ColorOutput::RGBA); - - Ok(GifDecoder { - reader: decoder.read_info(r).map_err(ImageError::from_decoding)?, - limits: Limits::default(), - }) - } - - /// Creates a new decoder that decodes the input steam `r`, using limits `limits` - pub fn with_limits(r: R, limits: Limits) -> ImageResult<GifDecoder<R>> { - let mut decoder = gif::DecodeOptions::new(); - decoder.set_color_output(ColorOutput::RGBA); - - Ok(GifDecoder { - reader: decoder.read_info(r).map_err(ImageError::from_decoding)?, - limits, - }) - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct GifReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for GifReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for GifDecoder<R> { - type Reader = GifReader<R>; - - fn dimensions(&self) -> (u32, u32) { - ( - u32::from(self.reader.width()), - u32::from(self.reader.height()), - ) - } - - fn color_type(&self) -> ColorType { - ColorType::Rgba8 - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(GifReader( - Cursor::new(image::decoder_to_vec(self)?), - PhantomData, - )) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - - let frame = match self - .reader - .next_frame_info() - .map_err(ImageError::from_decoding)? - { - Some(frame) => FrameInfo::new_from_frame(frame), - None => { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::NoMoreData, - ))) - } - }; - - let (width, height) = self.dimensions(); - - if frame.left == 0 - && frame.width == width - && (frame.top as u64 + frame.height as u64 <= height as u64) - { - // If the frame matches the logical screen, or, as a more general case, - // fits into it and touches its left and right borders, then - // we can directly write it into the buffer without causing line wraparound. - let line_length = usize::try_from(width) - .unwrap() - .checked_mul(self.color_type().bytes_per_pixel() as usize) - .unwrap(); - - // isolate the portion of the buffer to read the frame data into. - // the chunks above and below it are going to be zeroed. - let (blank_top, rest) = - buf.split_at_mut(line_length.checked_mul(frame.top as usize).unwrap()); - let (buf, blank_bottom) = - rest.split_at_mut(line_length.checked_mul(frame.height as usize).unwrap()); - - debug_assert_eq!(buf.len(), self.reader.buffer_size()); - - // this is only necessary in case the buffer is not zeroed - for b in blank_top { - *b = 0; - } - // fill the middle section with the frame data - self.reader - .read_into_buffer(buf) - .map_err(ImageError::from_decoding)?; - // this is only necessary in case the buffer is not zeroed - for b in blank_bottom { - *b = 0; - } - } else { - // If the frame does not match the logical screen, read into an extra buffer - // and 'insert' the frame from left/top to logical screen width/height. - let buffer_size = self.reader.buffer_size(); - - self.limits.reserve_usize(buffer_size)?; - - let mut frame_buffer = vec![0; buffer_size]; - - self.limits.free_usize(buffer_size); - - self.reader - .read_into_buffer(&mut frame_buffer[..]) - .map_err(ImageError::from_decoding)?; - - let frame_buffer = ImageBuffer::from_raw(frame.width, frame.height, frame_buffer); - let image_buffer = ImageBuffer::from_raw(width, height, buf); - - // `buffer_size` uses wrapping arithmetic, thus might not report the - // correct storage requirement if the result does not fit in `usize`. - // `ImageBuffer::from_raw` detects overflow and reports by returning `None`. - if frame_buffer.is_none() || image_buffer.is_none() { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Gif.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Image dimensions ({}, {}) are too large", - frame.width, frame.height - )), - ), - )); - } - - let frame_buffer = frame_buffer.unwrap(); - let mut image_buffer = image_buffer.unwrap(); - - for (x, y, pixel) in image_buffer.enumerate_pixels_mut() { - let frame_x = x.wrapping_sub(frame.left); - let frame_y = y.wrapping_sub(frame.top); - - if frame_x < frame.width && frame_y < frame.height { - *pixel = *frame_buffer.get_pixel(frame_x, frame_y); - } else { - // this is only necessary in case the buffer is not zeroed - *pixel = Rgba([0, 0, 0, 0]); - } - } - } - - Ok(()) - } -} - -struct GifFrameIterator<R: Read> { - reader: gif::Decoder<R>, - - width: u32, - height: u32, - - non_disposed_frame: ImageBuffer<Rgba<u8>, Vec<u8>>, -} - -impl<R: Read> GifFrameIterator<R> { - fn new(decoder: GifDecoder<R>) -> GifFrameIterator<R> { - let (width, height) = decoder.dimensions(); - - // intentionally ignore the background color for web compatibility - - // create the first non disposed frame - let non_disposed_frame = ImageBuffer::from_pixel(width, height, Rgba([0, 0, 0, 0])); - - GifFrameIterator { - reader: decoder.reader, - width, - height, - non_disposed_frame, - } - } -} - -impl<R: Read> Iterator for GifFrameIterator<R> { - type Item = ImageResult<animation::Frame>; - - fn next(&mut self) -> Option<ImageResult<animation::Frame>> { - // begin looping over each frame - - let frame = match self.reader.next_frame_info() { - Ok(frame_info) => { - if let Some(frame) = frame_info { - FrameInfo::new_from_frame(frame) - } else { - // no more frames - return None; - } - } - Err(err) => return Some(Err(ImageError::from_decoding(err))), - }; - - let mut vec = vec![0; self.reader.buffer_size()]; - if let Err(err) = self.reader.read_into_buffer(&mut vec) { - return Some(Err(ImageError::from_decoding(err))); - } - - // create the image buffer from the raw frame. - // `buffer_size` uses wrapping arithmetic, thus might not report the - // correct storage requirement if the result does not fit in `usize`. - // on the other hand, `ImageBuffer::from_raw` detects overflow and - // reports by returning `None`. - let mut frame_buffer = match ImageBuffer::from_raw(frame.width, frame.height, vec) { - Some(frame_buffer) => frame_buffer, - None => { - return Some(Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Gif.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Image dimensions ({}, {}) are too large", - frame.width, frame.height - )), - ), - ))) - } - }; - - // blend the current frame with the non-disposed frame, then update - // the non-disposed frame according to the disposal method. - fn blend_and_dispose_pixel( - dispose: DisposalMethod, - previous: &mut Rgba<u8>, - current: &mut Rgba<u8>, - ) { - let pixel_alpha = current.channels()[3]; - if pixel_alpha == 0 { - *current = *previous; - } - - match dispose { - DisposalMethod::Any | DisposalMethod::Keep => { - // do not dispose - // (keep pixels from this frame) - // note: the `Any` disposal method is underspecified in the GIF - // spec, but most viewers treat it identically to `Keep` - *previous = *current; - } - DisposalMethod::Background => { - // restore to background color - // (background shows through transparent pixels in the next frame) - *previous = Rgba([0, 0, 0, 0]); - } - DisposalMethod::Previous => { - // restore to previous - // (dispose frames leaving the last none disposal frame) - } - } - } - - // if `frame_buffer`'s frame exactly matches the entire image, then - // use it directly, else create a new buffer to hold the composited - // image. - let image_buffer = if (frame.left, frame.top) == (0, 0) - && (self.width, self.height) == frame_buffer.dimensions() - { - for (x, y, pixel) in frame_buffer.enumerate_pixels_mut() { - let previous_pixel = self.non_disposed_frame.get_pixel_mut(x, y); - blend_and_dispose_pixel(frame.disposal_method, previous_pixel, pixel); - } - frame_buffer - } else { - ImageBuffer::from_fn(self.width, self.height, |x, y| { - let frame_x = x.wrapping_sub(frame.left); - let frame_y = y.wrapping_sub(frame.top); - let previous_pixel = self.non_disposed_frame.get_pixel_mut(x, y); - - if frame_x < frame_buffer.width() && frame_y < frame_buffer.height() { - let mut pixel = *frame_buffer.get_pixel(frame_x, frame_y); - blend_and_dispose_pixel(frame.disposal_method, previous_pixel, &mut pixel); - pixel - } else { - // out of bounds, return pixel from previous frame - *previous_pixel - } - }) - }; - - Some(Ok(animation::Frame::from_parts( - image_buffer, - 0, - 0, - frame.delay, - ))) - } -} - -impl<'a, R: Read + 'a> AnimationDecoder<'a> for GifDecoder<R> { - fn into_frames(self) -> animation::Frames<'a> { - animation::Frames::new(Box::new(GifFrameIterator::new(self))) - } -} - -struct FrameInfo { - left: u32, - top: u32, - width: u32, - height: u32, - disposal_method: DisposalMethod, - delay: animation::Delay, -} - -impl FrameInfo { - fn new_from_frame(frame: &Frame) -> FrameInfo { - FrameInfo { - left: u32::from(frame.left), - top: u32::from(frame.top), - width: u32::from(frame.width), - height: u32::from(frame.height), - disposal_method: frame.dispose, - // frame.delay is in units of 10ms so frame.delay*10 is in ms - delay: animation::Delay::from_ratio(Ratio::new(u32::from(frame.delay) * 10, 1)), - } - } -} - -/// Number of repetitions for a GIF animation -#[derive(Clone, Copy, Debug)] -pub enum Repeat { - /// Finite number of repetitions - Finite(u16), - /// Looping GIF - Infinite, -} - -impl Repeat { - pub(crate) fn to_gif_enum(&self) -> gif::Repeat { - match self { - Repeat::Finite(n) => gif::Repeat::Finite(*n), - Repeat::Infinite => gif::Repeat::Infinite, - } - } -} - -/// GIF encoder. -pub struct GifEncoder<W: Write> { - w: Option<W>, - gif_encoder: Option<gif::Encoder<W>>, - speed: i32, - repeat: Option<Repeat>, -} - -impl<W: Write> GifEncoder<W> { - /// Creates a new GIF encoder with a speed of 1. This prioritizes quality over performance at any cost. - pub fn new(w: W) -> GifEncoder<W> { - Self::new_with_speed(w, 1) - } - - /// Create a new GIF encoder, and has the speed parameter `speed`. See - /// [`Frame::from_rgba_speed`](https://docs.rs/gif/latest/gif/struct.Frame.html#method.from_rgba_speed) - /// for more information. - pub fn new_with_speed(w: W, speed: i32) -> GifEncoder<W> { - assert!( - (1..=30).contains(&speed), - "speed needs to be in the range [1, 30]" - ); - GifEncoder { - w: Some(w), - gif_encoder: None, - speed, - repeat: None, - } - } - - /// Set the repeat behaviour of the encoded GIF - pub fn set_repeat(&mut self, repeat: Repeat) -> ImageResult<()> { - if let Some(ref mut encoder) = self.gif_encoder { - encoder - .set_repeat(repeat.to_gif_enum()) - .map_err(ImageError::from_encoding)?; - } - self.repeat = Some(repeat); - Ok(()) - } - - /// Encode a single image. - pub fn encode( - &mut self, - data: &[u8], - width: u32, - height: u32, - color: ColorType, - ) -> ImageResult<()> { - let (width, height) = self.gif_dimensions(width, height)?; - match color { - ColorType::Rgb8 => self.encode_gif(Frame::from_rgb(width, height, data)), - ColorType::Rgba8 => { - self.encode_gif(Frame::from_rgba(width, height, &mut data.to_owned())) - } - _ => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Gif.into(), - UnsupportedErrorKind::Color(color.into()), - ), - )), - } - } - - /// Encode one frame of animation. - pub fn encode_frame(&mut self, img_frame: animation::Frame) -> ImageResult<()> { - let frame = self.convert_frame(img_frame)?; - self.encode_gif(frame) - } - - /// Encodes Frames. - /// Consider using `try_encode_frames` instead to encode an `animation::Frames` like iterator. - pub fn encode_frames<F>(&mut self, frames: F) -> ImageResult<()> - where - F: IntoIterator<Item = animation::Frame>, - { - for img_frame in frames { - self.encode_frame(img_frame)?; - } - Ok(()) - } - - /// Try to encode a collection of `ImageResult<animation::Frame>` objects. - /// Use this function to encode an `animation::Frames` like iterator. - /// Whenever an `Err` item is encountered, that value is returned without further actions. - pub fn try_encode_frames<F>(&mut self, frames: F) -> ImageResult<()> - where - F: IntoIterator<Item = ImageResult<animation::Frame>>, - { - for img_frame in frames { - self.encode_frame(img_frame?)?; - } - Ok(()) - } - - pub(crate) fn convert_frame( - &mut self, - img_frame: animation::Frame, - ) -> ImageResult<Frame<'static>> { - // get the delay before converting img_frame - let frame_delay = img_frame.delay().into_ratio().to_integer(); - // convert img_frame into RgbaImage - let mut rbga_frame = img_frame.into_buffer(); - let (width, height) = self.gif_dimensions(rbga_frame.width(), rbga_frame.height())?; - - // Create the gif::Frame from the animation::Frame - let mut frame = Frame::from_rgba_speed(width, height, &mut rbga_frame, self.speed); - // Saturate the conversion to u16::MAX instead of returning an error as that - // would require a new special cased variant in ParameterErrorKind which most - // likely couldn't be reused for other cases. This isn't a bad trade-off given - // that the current algorithm is already lossy. - frame.delay = (frame_delay / 10).try_into().unwrap_or(std::u16::MAX); - - Ok(frame) - } - - fn gif_dimensions(&self, width: u32, height: u32) -> ImageResult<(u16, u16)> { - fn inner_dimensions(width: u32, height: u32) -> Option<(u16, u16)> { - let width = u16::try_from(width).ok()?; - let height = u16::try_from(height).ok()?; - Some((width, height)) - } - - // TODO: this is not very idiomatic yet. Should return an EncodingError. - inner_dimensions(width, height).ok_or_else(|| { - ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - )) - }) - } - - pub(crate) fn encode_gif(&mut self, mut frame: Frame) -> ImageResult<()> { - let gif_encoder; - if let Some(ref mut encoder) = self.gif_encoder { - gif_encoder = encoder; - } else { - let writer = self.w.take().unwrap(); - let mut encoder = gif::Encoder::new(writer, frame.width, frame.height, &[]) - .map_err(ImageError::from_encoding)?; - if let Some(ref repeat) = self.repeat { - encoder - .set_repeat(repeat.to_gif_enum()) - .map_err(ImageError::from_encoding)?; - } - self.gif_encoder = Some(encoder); - gif_encoder = self.gif_encoder.as_mut().unwrap() - } - - frame.dispose = gif::DisposalMethod::Background; - - gif_encoder - .write_frame(&frame) - .map_err(ImageError::from_encoding) - } -} - -impl ImageError { - fn from_decoding(err: gif::DecodingError) -> ImageError { - use gif::DecodingError::*; - match err { - err @ Format(_) => { - ImageError::Decoding(DecodingError::new(ImageFormat::Gif.into(), err)) - } - Io(io_err) => ImageError::IoError(io_err), - } - } - - fn from_encoding(err: gif::EncodingError) -> ImageError { - use gif::EncodingError::*; - match err { - err @ Format(_) => { - ImageError::Encoding(EncodingError::new(ImageFormat::Gif.into(), err)) - } - Io(io_err) => ImageError::IoError(io_err), - } - } -} - -#[cfg(test)] -mod test { - use super::*; - - #[test] - fn frames_exceeding_logical_screen_size() { - // This is a gif with 10x10 logical screen, but a 16x16 frame + 6px offset inside. - let data = vec![ - 0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x0A, 0x00, 0x0A, 0x00, 0xF0, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x0E, 0xFF, 0x1F, 0x21, 0xF9, 0x04, 0x09, 0x64, 0x00, 0x00, 0x00, 0x2C, - 0x06, 0x00, 0x06, 0x00, 0x10, 0x00, 0x10, 0x00, 0x00, 0x02, 0x23, 0x84, 0x8F, 0xA9, - 0xBB, 0xE1, 0xE8, 0x42, 0x8A, 0x0F, 0x50, 0x79, 0xAE, 0xD1, 0xF9, 0x7A, 0xE8, 0x71, - 0x5B, 0x48, 0x81, 0x64, 0xD5, 0x91, 0xCA, 0x89, 0x4D, 0x21, 0x63, 0x89, 0x4C, 0x09, - 0x77, 0xF5, 0x6D, 0x14, 0x00, 0x3B, - ]; - - let decoder = GifDecoder::new(Cursor::new(data)).unwrap(); - let mut buf = vec![0u8; decoder.total_bytes() as usize]; - - assert!(decoder.read_image(&mut buf).is_ok()); - } -} diff --git a/vendor/image/src/codecs/hdr/decoder.rs b/vendor/image/src/codecs/hdr/decoder.rs deleted file mode 100644 index 8329d57..0000000 --- a/vendor/image/src/codecs/hdr/decoder.rs +++ /dev/null @@ -1,1033 +0,0 @@ -use crate::Primitive; -use num_traits::identities::Zero; -#[cfg(test)] -use std::borrow::Cow; -use std::convert::TryFrom; -use std::io::{self, BufRead, Cursor, Read, Seek}; -use std::iter::Iterator; -use std::marker::PhantomData; -use std::num::{ParseFloatError, ParseIntError}; -use std::path::Path; -use std::{error, fmt, mem}; - -use crate::color::{ColorType, Rgb}; -use crate::error::{ - DecodingError, ImageError, ImageFormatHint, ImageResult, ParameterError, ParameterErrorKind, - UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{self, ImageDecoder, ImageDecoderRect, ImageFormat, Progress}; - -/// Errors that can occur during decoding and parsing of a HDR image -#[derive(Debug, Clone, PartialEq, Eq)] -enum DecoderError { - /// HDR's "#?RADIANCE" signature wrong or missing - RadianceHdrSignatureInvalid, - /// EOF before end of header - TruncatedHeader, - /// EOF instead of image dimensions - TruncatedDimensions, - - /// A value couldn't be parsed - UnparsableF32(LineType, ParseFloatError), - /// A value couldn't be parsed - UnparsableU32(LineType, ParseIntError), - /// Not enough numbers in line - LineTooShort(LineType), - - /// COLORCORR contains too many numbers in strict mode - ExtraneousColorcorrNumbers, - - /// Dimensions line had too few elements - DimensionsLineTooShort(usize, usize), - /// Dimensions line had too many elements - DimensionsLineTooLong(usize), - - /// The length of a scanline (1) wasn't a match for the specified length (2) - WrongScanlineLength(usize, usize), - /// First pixel of a scanline is a run length marker - FirstPixelRlMarker, -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::RadianceHdrSignatureInvalid => { - f.write_str("Radiance HDR signature not found") - } - DecoderError::TruncatedHeader => f.write_str("EOF in header"), - DecoderError::TruncatedDimensions => f.write_str("EOF in dimensions line"), - DecoderError::UnparsableF32(line, pe) => { - f.write_fmt(format_args!("Cannot parse {} value as f32: {}", line, pe)) - } - DecoderError::UnparsableU32(line, pe) => { - f.write_fmt(format_args!("Cannot parse {} value as u32: {}", line, pe)) - } - DecoderError::LineTooShort(line) => { - f.write_fmt(format_args!("Not enough numbers in {}", line)) - } - DecoderError::ExtraneousColorcorrNumbers => f.write_str("Extra numbers in COLORCORR"), - DecoderError::DimensionsLineTooShort(elements, expected) => f.write_fmt(format_args!( - "Dimensions line too short: have {} elements, expected {}", - elements, expected - )), - DecoderError::DimensionsLineTooLong(expected) => f.write_fmt(format_args!( - "Dimensions line too long, expected {} elements", - expected - )), - DecoderError::WrongScanlineLength(len, expected) => f.write_fmt(format_args!( - "Wrong length of decoded scanline: got {}, expected {}", - len, expected - )), - DecoderError::FirstPixelRlMarker => { - f.write_str("First pixel of a scanline shouldn't be run length marker") - } - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::Hdr.into(), e)) - } -} - -impl error::Error for DecoderError { - fn source(&self) -> Option<&(dyn error::Error + 'static)> { - match self { - DecoderError::UnparsableF32(_, err) => Some(err), - DecoderError::UnparsableU32(_, err) => Some(err), - _ => None, - } - } -} - -/// Lines which contain parsable data that can fail -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum LineType { - Exposure, - Pixaspect, - Colorcorr, - DimensionsHeight, - DimensionsWidth, -} - -impl fmt::Display for LineType { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str(match self { - LineType::Exposure => "EXPOSURE", - LineType::Pixaspect => "PIXASPECT", - LineType::Colorcorr => "COLORCORR", - LineType::DimensionsHeight => "height dimension", - LineType::DimensionsWidth => "width dimension", - }) - } -} - -/// Adapter to conform to `ImageDecoder` trait -#[derive(Debug)] -pub struct HdrAdapter<R: Read> { - inner: Option<HdrDecoder<R>>, - // data: Option<Vec<u8>>, - meta: HdrMetadata, -} - -impl<R: BufRead> HdrAdapter<R> { - /// Creates adapter - pub fn new(r: R) -> ImageResult<HdrAdapter<R>> { - let decoder = HdrDecoder::new(r)?; - let meta = decoder.metadata(); - Ok(HdrAdapter { - inner: Some(decoder), - meta, - }) - } - - /// Allows reading old Radiance HDR images - pub fn new_nonstrict(r: R) -> ImageResult<HdrAdapter<R>> { - let decoder = HdrDecoder::with_strictness(r, false)?; - let meta = decoder.metadata(); - Ok(HdrAdapter { - inner: Some(decoder), - meta, - }) - } - - /// Read the actual data of the image, and store it in Self::data. - fn read_image_data(&mut self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - match self.inner.take() { - Some(decoder) => { - let img: Vec<Rgb<u8>> = decoder.read_image_ldr()?; - for (i, Rgb(data)) in img.into_iter().enumerate() { - buf[(i * 3)..][..3].copy_from_slice(&data); - } - - Ok(()) - } - None => Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::NoMoreData, - ))), - } - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct HdrReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for HdrReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + BufRead> ImageDecoder<'a> for HdrAdapter<R> { - type Reader = HdrReader<R>; - - fn dimensions(&self) -> (u32, u32) { - (self.meta.width, self.meta.height) - } - - fn color_type(&self) -> ColorType { - ColorType::Rgb8 - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(HdrReader( - Cursor::new(image::decoder_to_vec(self)?), - PhantomData, - )) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - self.read_image_data(buf) - } -} - -impl<'a, R: 'a + BufRead + Seek> ImageDecoderRect<'a> for HdrAdapter<R> { - fn read_rect_with_progress<F: Fn(Progress)>( - &mut self, - x: u32, - y: u32, - width: u32, - height: u32, - buf: &mut [u8], - progress_callback: F, - ) -> ImageResult<()> { - image::load_rect( - x, - y, - width, - height, - buf, - progress_callback, - self, - |_, _| unreachable!(), - |s, buf| s.read_image_data(buf), - ) - } -} - -/// Radiance HDR file signature -pub const SIGNATURE: &[u8] = b"#?RADIANCE"; -const SIGNATURE_LENGTH: usize = 10; - -/// An Radiance HDR decoder -#[derive(Debug)] -pub struct HdrDecoder<R> { - r: R, - width: u32, - height: u32, - meta: HdrMetadata, -} - -/// Refer to [wikipedia](https://en.wikipedia.org/wiki/RGBE_image_format) -#[repr(C)] -#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)] -pub struct Rgbe8Pixel { - /// Color components - pub c: [u8; 3], - /// Exponent - pub e: u8, -} - -/// Creates `Rgbe8Pixel` from components -pub fn rgbe8(r: u8, g: u8, b: u8, e: u8) -> Rgbe8Pixel { - Rgbe8Pixel { c: [r, g, b], e } -} - -impl Rgbe8Pixel { - /// Converts `Rgbe8Pixel` into `Rgb<f32>` linearly - #[inline] - pub fn to_hdr(self) -> Rgb<f32> { - if self.e == 0 { - Rgb([0.0, 0.0, 0.0]) - } else { - // let exp = f32::ldexp(1., self.e as isize - (128 + 8)); // unstable - let exp = f32::exp2(<f32 as From<_>>::from(self.e) - (128.0 + 8.0)); - Rgb([ - exp * <f32 as From<_>>::from(self.c[0]), - exp * <f32 as From<_>>::from(self.c[1]), - exp * <f32 as From<_>>::from(self.c[2]), - ]) - } - } - - /// Converts `Rgbe8Pixel` into `Rgb<T>` with scale=1 and gamma=2.2 - /// - /// color_ldr = (color_hdr*scale)<sup>gamma</sup> - /// - /// # Panic - /// - /// Panics when `T::max_value()` cannot be represented as f32. - #[inline] - pub fn to_ldr<T: Primitive + Zero>(self) -> Rgb<T> { - self.to_ldr_scale_gamma(1.0, 2.2) - } - - /// Converts `Rgbe8Pixel` into `Rgb<T>` using provided scale and gamma - /// - /// color_ldr = (color_hdr*scale)<sup>gamma</sup> - /// - /// # Panic - /// - /// Panics when `T::max_value()` cannot be represented as f32. - /// Panics when scale or gamma is NaN - #[inline] - pub fn to_ldr_scale_gamma<T: Primitive + Zero>(self, scale: f32, gamma: f32) -> Rgb<T> { - let Rgb(data) = self.to_hdr(); - let (r, g, b) = (data[0], data[1], data[2]); - #[inline] - fn sg<T: Primitive + Zero>(v: f32, scale: f32, gamma: f32) -> T { - let t_max = T::max_value(); - // Disassembly shows that t_max_f32 is compiled into constant - let t_max_f32: f32 = num_traits::NumCast::from(t_max) - .expect("to_ldr_scale_gamma: maximum value of type is not representable as f32"); - let fv = f32::powf(v * scale, gamma) * t_max_f32 + 0.5; - if fv < 0.0 { - T::zero() - } else if fv > t_max_f32 { - t_max - } else { - num_traits::NumCast::from(fv) - .expect("to_ldr_scale_gamma: cannot convert f32 to target type. NaN?") - } - } - Rgb([ - sg(r, scale, gamma), - sg(g, scale, gamma), - sg(b, scale, gamma), - ]) - } -} - -impl<R: BufRead> HdrDecoder<R> { - /// Reads Radiance HDR image header from stream `r` - /// if the header is valid, creates HdrDecoder - /// strict mode is enabled - pub fn new(reader: R) -> ImageResult<HdrDecoder<R>> { - HdrDecoder::with_strictness(reader, true) - } - - /// Reads Radiance HDR image header from stream `reader`, - /// if the header is valid, creates `HdrDecoder`. - /// - /// strict enables strict mode - /// - /// Warning! Reading wrong file in non-strict mode - /// could consume file size worth of memory in the process. - pub fn with_strictness(mut reader: R, strict: bool) -> ImageResult<HdrDecoder<R>> { - let mut attributes = HdrMetadata::new(); - - { - // scope to make borrowck happy - let r = &mut reader; - if strict { - let mut signature = [0; SIGNATURE_LENGTH]; - r.read_exact(&mut signature)?; - if signature != SIGNATURE { - return Err(DecoderError::RadianceHdrSignatureInvalid.into()); - } // no else - // skip signature line ending - read_line_u8(r)?; - } else { - // Old Radiance HDR files (*.pic) don't use signature - // Let them be parsed in non-strict mode - } - // read header data until empty line - loop { - match read_line_u8(r)? { - None => { - // EOF before end of header - return Err(DecoderError::TruncatedHeader.into()); - } - Some(line) => { - if line.is_empty() { - // end of header - break; - } else if line[0] == b'#' { - // line[0] will not panic, line.len() == 0 is false here - // skip comments - continue; - } // no else - // process attribute line - let line = String::from_utf8_lossy(&line[..]); - attributes.update_header_info(&line, strict)?; - } // <= Some(line) - } // match read_line_u8() - } // loop - } // scope to end borrow of reader - // parse dimensions - let (width, height) = match read_line_u8(&mut reader)? { - None => { - // EOF instead of image dimensions - return Err(DecoderError::TruncatedDimensions.into()); - } - Some(dimensions) => { - let dimensions = String::from_utf8_lossy(&dimensions[..]); - parse_dimensions_line(&dimensions, strict)? - } - }; - - // color type is always rgb8 - if crate::utils::check_dimension_overflow(width, height, ColorType::Rgb8.bytes_per_pixel()) - { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Hdr.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Image dimensions ({}x{}) are too large", - width, height - )), - ), - )); - } - - Ok(HdrDecoder { - r: reader, - - width, - height, - meta: HdrMetadata { - width, - height, - ..attributes - }, - }) - } // end with_strictness - - /// Returns file metadata. Refer to `HdrMetadata` for details. - pub fn metadata(&self) -> HdrMetadata { - self.meta.clone() - } - - /// Consumes decoder and returns a vector of RGBE8 pixels - pub fn read_image_native(mut self) -> ImageResult<Vec<Rgbe8Pixel>> { - // Don't read anything if image is empty - if self.width == 0 || self.height == 0 { - return Ok(vec![]); - } - // expression self.width > 0 && self.height > 0 is true from now to the end of this method - let pixel_count = self.width as usize * self.height as usize; - let mut ret = vec![Default::default(); pixel_count]; - for chunk in ret.chunks_mut(self.width as usize) { - read_scanline(&mut self.r, chunk)?; - } - Ok(ret) - } - - /// Consumes decoder and returns a vector of transformed pixels - pub fn read_image_transform<T: Send, F: Send + Sync + Fn(Rgbe8Pixel) -> T>( - mut self, - f: F, - output_slice: &mut [T], - ) -> ImageResult<()> { - assert_eq!( - output_slice.len(), - self.width as usize * self.height as usize - ); - - // Don't read anything if image is empty - if self.width == 0 || self.height == 0 { - return Ok(()); - } - - let chunks_iter = output_slice.chunks_mut(self.width as usize); - - let mut buf = vec![Default::default(); self.width as usize]; - for chunk in chunks_iter { - // read_scanline overwrites the entire buffer or returns an Err, - // so not resetting the buffer here is ok. - read_scanline(&mut self.r, &mut buf[..])?; - for (dst, &pix) in chunk.iter_mut().zip(buf.iter()) { - *dst = f(pix); - } - } - Ok(()) - } - - /// Consumes decoder and returns a vector of `Rgb<u8>` pixels. - /// scale = 1, gamma = 2.2 - pub fn read_image_ldr(self) -> ImageResult<Vec<Rgb<u8>>> { - let mut ret = vec![Rgb([0, 0, 0]); self.width as usize * self.height as usize]; - self.read_image_transform(|pix| pix.to_ldr(), &mut ret[..])?; - Ok(ret) - } - - /// Consumes decoder and returns a vector of `Rgb<f32>` pixels. - /// - pub fn read_image_hdr(self) -> ImageResult<Vec<Rgb<f32>>> { - let mut ret = vec![Rgb([0.0, 0.0, 0.0]); self.width as usize * self.height as usize]; - self.read_image_transform(|pix| pix.to_hdr(), &mut ret[..])?; - Ok(ret) - } -} - -impl<R: Read> IntoIterator for HdrDecoder<R> { - type Item = ImageResult<Rgbe8Pixel>; - type IntoIter = HdrImageDecoderIterator<R>; - - fn into_iter(self) -> Self::IntoIter { - HdrImageDecoderIterator { - r: self.r, - scanline_cnt: self.height as usize, - buf: vec![Default::default(); self.width as usize], - col: 0, - scanline: 0, - trouble: true, // make first call to `next()` read scanline - error_encountered: false, - } - } -} - -/// Scanline buffered pixel by pixel iterator -pub struct HdrImageDecoderIterator<R: Read> { - r: R, - scanline_cnt: usize, - buf: Vec<Rgbe8Pixel>, // scanline buffer - col: usize, // current position in scanline - scanline: usize, // current scanline - trouble: bool, // optimization, true indicates that we need to check something - error_encountered: bool, -} - -impl<R: Read> HdrImageDecoderIterator<R> { - // Advances counter to the next pixel - #[inline] - fn advance(&mut self) { - self.col += 1; - if self.col == self.buf.len() { - self.col = 0; - self.scanline += 1; - self.trouble = true; - } - } -} - -impl<R: Read> Iterator for HdrImageDecoderIterator<R> { - type Item = ImageResult<Rgbe8Pixel>; - - fn next(&mut self) -> Option<Self::Item> { - if !self.trouble { - let ret = self.buf[self.col]; - self.advance(); - Some(Ok(ret)) - } else { - // some condition is pending - if self.buf.is_empty() || self.scanline == self.scanline_cnt { - // No more pixels - return None; - } // no else - if self.error_encountered { - self.advance(); - // Error was encountered. Keep producing errors. - // ImageError can't implement Clone, so just dump some error - return Some(Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::FailedAlready, - )))); - } // no else - if self.col == 0 { - // fill scanline buffer - match read_scanline(&mut self.r, &mut self.buf[..]) { - Ok(_) => { - // no action required - } - Err(err) => { - self.advance(); - self.error_encountered = true; - self.trouble = true; - return Some(Err(err)); - } - } - } // no else - self.trouble = false; - let ret = self.buf[0]; - self.advance(); - Some(Ok(ret)) - } - } - - fn size_hint(&self) -> (usize, Option<usize>) { - let total_cnt = self.buf.len() * self.scanline_cnt; - let cur_cnt = self.buf.len() * self.scanline + self.col; - let remaining = total_cnt - cur_cnt; - (remaining, Some(remaining)) - } -} - -impl<R: Read> ExactSizeIterator for HdrImageDecoderIterator<R> {} - -// Precondition: buf.len() > 0 -fn read_scanline<R: Read>(r: &mut R, buf: &mut [Rgbe8Pixel]) -> ImageResult<()> { - assert!(!buf.is_empty()); - let width = buf.len(); - // first 4 bytes in scanline allow to determine compression method - let fb = read_rgbe(r)?; - if fb.c[0] == 2 && fb.c[1] == 2 && fb.c[2] < 128 { - // denormalized pixel value (2,2,<128,_) indicates new per component RLE method - // decode_component guarantees that offset is within 0 .. width - // therefore we can skip bounds checking here, but we will not - decode_component(r, width, |offset, value| buf[offset].c[0] = value)?; - decode_component(r, width, |offset, value| buf[offset].c[1] = value)?; - decode_component(r, width, |offset, value| buf[offset].c[2] = value)?; - decode_component(r, width, |offset, value| buf[offset].e = value)?; - } else { - // old RLE method (it was considered old around 1991, should it be here?) - decode_old_rle(r, fb, buf)?; - } - Ok(()) -} - -#[inline(always)] -fn read_byte<R: Read>(r: &mut R) -> io::Result<u8> { - let mut buf = [0u8]; - r.read_exact(&mut buf[..])?; - Ok(buf[0]) -} - -// Guarantees that first parameter of set_component will be within pos .. pos+width -#[inline] -fn decode_component<R: Read, S: FnMut(usize, u8)>( - r: &mut R, - width: usize, - mut set_component: S, -) -> ImageResult<()> { - let mut buf = [0; 128]; - let mut pos = 0; - while pos < width { - // increment position by a number of decompressed values - pos += { - let rl = read_byte(r)?; - if rl <= 128 { - // sanity check - if pos + rl as usize > width { - return Err(DecoderError::WrongScanlineLength(pos + rl as usize, width).into()); - } - // read values - r.read_exact(&mut buf[0..rl as usize])?; - for (offset, &value) in buf[0..rl as usize].iter().enumerate() { - set_component(pos + offset, value); - } - rl as usize - } else { - // run - let rl = rl - 128; - // sanity check - if pos + rl as usize > width { - return Err(DecoderError::WrongScanlineLength(pos + rl as usize, width).into()); - } - // fill with same value - let value = read_byte(r)?; - for offset in 0..rl as usize { - set_component(pos + offset, value); - } - rl as usize - } - }; - } - if pos != width { - return Err(DecoderError::WrongScanlineLength(pos, width).into()); - } - Ok(()) -} - -// Decodes scanline, places it into buf -// Precondition: buf.len() > 0 -// fb - first 4 bytes of scanline -fn decode_old_rle<R: Read>(r: &mut R, fb: Rgbe8Pixel, buf: &mut [Rgbe8Pixel]) -> ImageResult<()> { - assert!(!buf.is_empty()); - let width = buf.len(); - // convenience function. - // returns run length if pixel is a run length marker - #[inline] - fn rl_marker(pix: Rgbe8Pixel) -> Option<usize> { - if pix.c == [1, 1, 1] { - Some(pix.e as usize) - } else { - None - } - } - // first pixel in scanline should not be run length marker - // it is error if it is - if rl_marker(fb).is_some() { - return Err(DecoderError::FirstPixelRlMarker.into()); - } - buf[0] = fb; // set first pixel of scanline - - let mut x_off = 1; // current offset from beginning of a scanline - let mut rl_mult = 1; // current run length multiplier - let mut prev_pixel = fb; - while x_off < width { - let pix = read_rgbe(r)?; - // it's harder to forget to increase x_off if I write this this way. - x_off += { - if let Some(rl) = rl_marker(pix) { - // rl_mult takes care of consecutive RL markers - let rl = rl * rl_mult; - rl_mult *= 256; - if x_off + rl <= width { - // do run - for b in &mut buf[x_off..x_off + rl] { - *b = prev_pixel; - } - } else { - return Err(DecoderError::WrongScanlineLength(x_off + rl, width).into()); - }; - rl // value to increase x_off by - } else { - rl_mult = 1; // chain of consecutive RL markers is broken - prev_pixel = pix; - buf[x_off] = pix; - 1 // value to increase x_off by - } - }; - } - if x_off != width { - return Err(DecoderError::WrongScanlineLength(x_off, width).into()); - } - Ok(()) -} - -fn read_rgbe<R: Read>(r: &mut R) -> io::Result<Rgbe8Pixel> { - let mut buf = [0u8; 4]; - r.read_exact(&mut buf[..])?; - Ok(Rgbe8Pixel { - c: [buf[0], buf[1], buf[2]], - e: buf[3], - }) -} - -/// Metadata for Radiance HDR image -#[derive(Debug, Clone)] -pub struct HdrMetadata { - /// Width of decoded image. It could be either scanline length, - /// or scanline count, depending on image orientation. - pub width: u32, - /// Height of decoded image. It depends on orientation too. - pub height: u32, - /// Orientation matrix. For standard orientation it is ((1,0),(0,1)) - left to right, top to bottom. - /// First pair tells how resulting pixel coordinates change along a scanline. - /// Second pair tells how they change from one scanline to the next. - pub orientation: ((i8, i8), (i8, i8)), - /// Divide color values by exposure to get to get physical radiance in - /// watts/steradian/m<sup>2</sup> - /// - /// Image may not contain physical data, even if this field is set. - pub exposure: Option<f32>, - /// Divide color values by corresponding tuple member (r, g, b) to get to get physical radiance - /// in watts/steradian/m<sup>2</sup> - /// - /// Image may not contain physical data, even if this field is set. - pub color_correction: Option<(f32, f32, f32)>, - /// Pixel height divided by pixel width - pub pixel_aspect_ratio: Option<f32>, - /// All lines contained in image header are put here. Ordering of lines is preserved. - /// Lines in the form "key=value" are represented as ("key", "value"). - /// All other lines are ("", "line") - pub custom_attributes: Vec<(String, String)>, -} - -impl HdrMetadata { - fn new() -> HdrMetadata { - HdrMetadata { - width: 0, - height: 0, - orientation: ((1, 0), (0, 1)), - exposure: None, - color_correction: None, - pixel_aspect_ratio: None, - custom_attributes: vec![], - } - } - - // Updates header info, in strict mode returns error for malformed lines (no '=' separator) - // unknown attributes are skipped - fn update_header_info(&mut self, line: &str, strict: bool) -> ImageResult<()> { - // split line at first '=' - // old Radiance HDR files (*.pic) feature tabs in key, so vvv trim - let maybe_key_value = split_at_first(line, "=").map(|(key, value)| (key.trim(), value)); - // save all header lines in custom_attributes - match maybe_key_value { - Some((key, val)) => self - .custom_attributes - .push((key.to_owned(), val.to_owned())), - None => self.custom_attributes.push(("".into(), line.to_owned())), - } - // parse known attributes - match maybe_key_value { - Some(("FORMAT", val)) => { - if val.trim() != "32-bit_rle_rgbe" { - // XYZE isn't supported yet - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Hdr.into(), - UnsupportedErrorKind::Format(ImageFormatHint::Name(limit_string_len( - val, 20, - ))), - ), - )); - } - } - Some(("EXPOSURE", val)) => { - match val.trim().parse::<f32>() { - Ok(v) => { - self.exposure = Some(self.exposure.unwrap_or(1.0) * v); // all encountered exposure values should be multiplied - } - Err(parse_error) => { - if strict { - return Err(DecoderError::UnparsableF32( - LineType::Exposure, - parse_error, - ) - .into()); - } // no else, skip this line in non-strict mode - } - }; - } - Some(("PIXASPECT", val)) => { - match val.trim().parse::<f32>() { - Ok(v) => { - self.pixel_aspect_ratio = Some(self.pixel_aspect_ratio.unwrap_or(1.0) * v); - // all encountered exposure values should be multiplied - } - Err(parse_error) => { - if strict { - return Err(DecoderError::UnparsableF32( - LineType::Pixaspect, - parse_error, - ) - .into()); - } // no else, skip this line in non-strict mode - } - }; - } - Some(("COLORCORR", val)) => { - let mut rgbcorr = [1.0, 1.0, 1.0]; - match parse_space_separated_f32(val, &mut rgbcorr, LineType::Colorcorr) { - Ok(extra_numbers) => { - if strict && extra_numbers { - return Err(DecoderError::ExtraneousColorcorrNumbers.into()); - } // no else, just ignore extra numbers - let (rc, gc, bc) = self.color_correction.unwrap_or((1.0, 1.0, 1.0)); - self.color_correction = - Some((rc * rgbcorr[0], gc * rgbcorr[1], bc * rgbcorr[2])); - } - Err(err) => { - if strict { - return Err(err); - } // no else, skip malformed line in non-strict mode - } - } - } - None => { - // old Radiance HDR files (*.pic) contain commands in a header - // just skip them - } - _ => { - // skip unknown attribute - } - } // match attributes - Ok(()) - } -} - -fn parse_space_separated_f32(line: &str, vals: &mut [f32], line_tp: LineType) -> ImageResult<bool> { - let mut nums = line.split_whitespace(); - for val in vals.iter_mut() { - if let Some(num) = nums.next() { - match num.parse::<f32>() { - Ok(v) => *val = v, - Err(err) => return Err(DecoderError::UnparsableF32(line_tp, err).into()), - } - } else { - // not enough numbers in line - return Err(DecoderError::LineTooShort(line_tp).into()); - } - } - Ok(nums.next().is_some()) -} - -// Parses dimension line "-Y height +X width" -// returns (width, height) or error -fn parse_dimensions_line(line: &str, strict: bool) -> ImageResult<(u32, u32)> { - const DIMENSIONS_COUNT: usize = 4; - - let mut dim_parts = line.split_whitespace(); - let c1_tag = dim_parts - .next() - .ok_or(DecoderError::DimensionsLineTooShort(0, DIMENSIONS_COUNT))?; - let c1_str = dim_parts - .next() - .ok_or(DecoderError::DimensionsLineTooShort(1, DIMENSIONS_COUNT))?; - let c2_tag = dim_parts - .next() - .ok_or(DecoderError::DimensionsLineTooShort(2, DIMENSIONS_COUNT))?; - let c2_str = dim_parts - .next() - .ok_or(DecoderError::DimensionsLineTooShort(3, DIMENSIONS_COUNT))?; - if strict && dim_parts.next().is_some() { - // extra data in dimensions line - return Err(DecoderError::DimensionsLineTooLong(DIMENSIONS_COUNT).into()); - } // no else - // dimensions line is in the form "-Y 10 +X 20" - // There are 8 possible orientations: +Y +X, +X -Y and so on - match (c1_tag, c2_tag) { - ("-Y", "+X") => { - // Common orientation (left-right, top-down) - // c1_str is height, c2_str is width - let height = c1_str - .parse::<u32>() - .map_err(|pe| DecoderError::UnparsableU32(LineType::DimensionsHeight, pe))?; - let width = c2_str - .parse::<u32>() - .map_err(|pe| DecoderError::UnparsableU32(LineType::DimensionsWidth, pe))?; - Ok((width, height)) - } - _ => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Hdr.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Orientation {} {}", - limit_string_len(c1_tag, 4), - limit_string_len(c2_tag, 4) - )), - ), - )), - } // final expression. Returns value -} - -// Returns string with no more than len+3 characters -fn limit_string_len(s: &str, len: usize) -> String { - let s_char_len = s.chars().count(); - if s_char_len > len { - s.chars().take(len).chain("...".chars()).collect() - } else { - s.into() - } -} - -// Splits string into (before separator, after separator) tuple -// or None if separator isn't found -fn split_at_first<'a>(s: &'a str, separator: &str) -> Option<(&'a str, &'a str)> { - match s.find(separator) { - None | Some(0) => None, - Some(p) if p >= s.len() - separator.len() => None, - Some(p) => Some((&s[..p], &s[(p + separator.len())..])), - } -} - -#[test] -fn split_at_first_test() { - assert_eq!(split_at_first(&Cow::Owned("".into()), "="), None); - assert_eq!(split_at_first(&Cow::Owned("=".into()), "="), None); - assert_eq!(split_at_first(&Cow::Owned("= ".into()), "="), None); - assert_eq!( - split_at_first(&Cow::Owned(" = ".into()), "="), - Some((" ", " ")) - ); - assert_eq!( - split_at_first(&Cow::Owned("EXPOSURE= ".into()), "="), - Some(("EXPOSURE", " ")) - ); - assert_eq!( - split_at_first(&Cow::Owned("EXPOSURE= =".into()), "="), - Some(("EXPOSURE", " =")) - ); - assert_eq!( - split_at_first(&Cow::Owned("EXPOSURE== =".into()), "=="), - Some(("EXPOSURE", " =")) - ); - assert_eq!(split_at_first(&Cow::Owned("EXPOSURE".into()), ""), None); -} - -// Reads input until b"\n" or EOF -// Returns vector of read bytes NOT including end of line characters -// or return None to indicate end of file -fn read_line_u8<R: BufRead>(r: &mut R) -> ::std::io::Result<Option<Vec<u8>>> { - let mut ret = Vec::with_capacity(16); - match r.read_until(b'\n', &mut ret) { - Ok(0) => Ok(None), - Ok(_) => { - if let Some(&b'\n') = ret[..].last() { - let _ = ret.pop(); - } - Ok(Some(ret)) - } - Err(err) => Err(err), - } -} - -#[test] -fn read_line_u8_test() { - let buf: Vec<_> = (&b"One\nTwo\nThree\nFour\n\n\n"[..]).into(); - let input = &mut ::std::io::Cursor::new(buf); - assert_eq!(&read_line_u8(input).unwrap().unwrap()[..], &b"One"[..]); - assert_eq!(&read_line_u8(input).unwrap().unwrap()[..], &b"Two"[..]); - assert_eq!(&read_line_u8(input).unwrap().unwrap()[..], &b"Three"[..]); - assert_eq!(&read_line_u8(input).unwrap().unwrap()[..], &b"Four"[..]); - assert_eq!(&read_line_u8(input).unwrap().unwrap()[..], &b""[..]); - assert_eq!(&read_line_u8(input).unwrap().unwrap()[..], &b""[..]); - assert_eq!(read_line_u8(input).unwrap(), None); -} - -/// Helper function for reading raw 3-channel f32 images -pub fn read_raw_file<P: AsRef<Path>>(path: P) -> ::std::io::Result<Vec<Rgb<f32>>> { - use byteorder::{LittleEndian as LE, ReadBytesExt}; - use std::fs::File; - use std::io::BufReader; - - let mut r = BufReader::new(File::open(path)?); - let w = r.read_u32::<LE>()? as usize; - let h = r.read_u32::<LE>()? as usize; - let c = r.read_u32::<LE>()? as usize; - assert_eq!(c, 3); - let cnt = w * h; - let mut ret = Vec::with_capacity(cnt); - for _ in 0..cnt { - let cr = r.read_f32::<LE>()?; - let cg = r.read_f32::<LE>()?; - let cb = r.read_f32::<LE>()?; - ret.push(Rgb([cr, cg, cb])); - } - Ok(ret) -} - -#[cfg(test)] -mod test { - use super::*; - use std::io::Cursor; - - #[test] - fn dimension_overflow() { - let data = b"#?RADIANCE\nFORMAT=32-bit_rle_rgbe\n\n -Y 4294967295 +X 4294967295"; - - assert!(HdrAdapter::new(Cursor::new(data)).is_err()); - assert!(HdrAdapter::new_nonstrict(Cursor::new(data)).is_err()); - } -} diff --git a/vendor/image/src/codecs/hdr/encoder.rs b/vendor/image/src/codecs/hdr/encoder.rs deleted file mode 100644 index c3a176d..0000000 --- a/vendor/image/src/codecs/hdr/encoder.rs +++ /dev/null @@ -1,433 +0,0 @@ -use crate::codecs::hdr::{rgbe8, Rgbe8Pixel, SIGNATURE}; -use crate::color::Rgb; -use crate::error::ImageResult; -use std::cmp::Ordering; -use std::io::{Result, Write}; - -/// Radiance HDR encoder -pub struct HdrEncoder<W: Write> { - w: W, -} - -impl<W: Write> HdrEncoder<W> { - /// Creates encoder - pub fn new(w: W) -> HdrEncoder<W> { - HdrEncoder { w } - } - - /// Encodes the image ```data``` - /// that has dimensions ```width``` and ```height``` - pub fn encode(mut self, data: &[Rgb<f32>], width: usize, height: usize) -> ImageResult<()> { - assert!(data.len() >= width * height); - let w = &mut self.w; - w.write_all(SIGNATURE)?; - w.write_all(b"\n")?; - w.write_all(b"# Rust HDR encoder\n")?; - w.write_all(b"FORMAT=32-bit_rle_rgbe\n\n")?; - w.write_all(format!("-Y {} +X {}\n", height, width).as_bytes())?; - - if !(8..=32_768).contains(&width) { - for &pix in data { - write_rgbe8(w, to_rgbe8(pix))?; - } - } else { - // new RLE marker contains scanline width - let marker = rgbe8(2, 2, (width / 256) as u8, (width % 256) as u8); - // buffers for encoded pixels - let mut bufr = vec![0; width]; - let mut bufg = vec![0; width]; - let mut bufb = vec![0; width]; - let mut bufe = vec![0; width]; - let mut rle_buf = vec![0; width]; - for scanline in data.chunks(width) { - for ((((r, g), b), e), &pix) in bufr - .iter_mut() - .zip(bufg.iter_mut()) - .zip(bufb.iter_mut()) - .zip(bufe.iter_mut()) - .zip(scanline.iter()) - { - let cp = to_rgbe8(pix); - *r = cp.c[0]; - *g = cp.c[1]; - *b = cp.c[2]; - *e = cp.e; - } - write_rgbe8(w, marker)?; // New RLE encoding marker - rle_buf.clear(); - rle_compress(&bufr[..], &mut rle_buf); - w.write_all(&rle_buf[..])?; - rle_buf.clear(); - rle_compress(&bufg[..], &mut rle_buf); - w.write_all(&rle_buf[..])?; - rle_buf.clear(); - rle_compress(&bufb[..], &mut rle_buf); - w.write_all(&rle_buf[..])?; - rle_buf.clear(); - rle_compress(&bufe[..], &mut rle_buf); - w.write_all(&rle_buf[..])?; - } - } - Ok(()) - } -} - -#[derive(Debug, PartialEq, Eq)] -enum RunOrNot { - Run(u8, usize), - Norun(usize, usize), -} -use self::RunOrNot::{Norun, Run}; - -const RUN_MAX_LEN: usize = 127; -const NORUN_MAX_LEN: usize = 128; - -struct RunIterator<'a> { - data: &'a [u8], - curidx: usize, -} - -impl<'a> RunIterator<'a> { - fn new(data: &'a [u8]) -> RunIterator<'a> { - RunIterator { data, curidx: 0 } - } -} - -impl<'a> Iterator for RunIterator<'a> { - type Item = RunOrNot; - - fn next(&mut self) -> Option<Self::Item> { - if self.curidx == self.data.len() { - None - } else { - let cv = self.data[self.curidx]; - let crun = self.data[self.curidx..] - .iter() - .take_while(|&&v| v == cv) - .take(RUN_MAX_LEN) - .count(); - let ret = if crun > 2 { - Run(cv, crun) - } else { - Norun(self.curidx, crun) - }; - self.curidx += crun; - Some(ret) - } - } -} - -struct NorunCombineIterator<'a> { - runiter: RunIterator<'a>, - prev: Option<RunOrNot>, -} - -impl<'a> NorunCombineIterator<'a> { - fn new(data: &'a [u8]) -> NorunCombineIterator<'a> { - NorunCombineIterator { - runiter: RunIterator::new(data), - prev: None, - } - } -} - -// Combines sequential noruns produced by RunIterator -impl<'a> Iterator for NorunCombineIterator<'a> { - type Item = RunOrNot; - fn next(&mut self) -> Option<Self::Item> { - loop { - match self.prev.take() { - Some(Run(c, len)) => { - // Just return stored run - return Some(Run(c, len)); - } - Some(Norun(idx, len)) => { - // Let's see if we need to continue norun - match self.runiter.next() { - Some(Norun(_, len1)) => { - // norun continues - let clen = len + len1; // combined length - match clen.cmp(&NORUN_MAX_LEN) { - Ordering::Equal => return Some(Norun(idx, clen)), - Ordering::Greater => { - // combined norun exceeds maximum length. store extra part of norun - self.prev = - Some(Norun(idx + NORUN_MAX_LEN, clen - NORUN_MAX_LEN)); - // then return maximal norun - return Some(Norun(idx, NORUN_MAX_LEN)); - } - Ordering::Less => { - // len + len1 < NORUN_MAX_LEN - self.prev = Some(Norun(idx, len + len1)); - // combine and continue loop - } - } - } - Some(Run(c, len1)) => { - // Run encountered. Store it - self.prev = Some(Run(c, len1)); - return Some(Norun(idx, len)); // and return combined norun - } - None => { - // End of sequence - return Some(Norun(idx, len)); // return combined norun - } - } - } // End match self.prev.take() == Some(NoRun()) - None => { - // No norun to combine - match self.runiter.next() { - Some(Norun(idx, len)) => { - self.prev = Some(Norun(idx, len)); - // store for combine and continue the loop - } - Some(Run(c, len)) => { - // Some run. Just return it - return Some(Run(c, len)); - } - None => { - // That's all, folks - return None; - } - } - } // End match self.prev.take() == None - } // End match - } // End loop - } -} - -// Appends RLE compressed ```data``` to ```rle``` -fn rle_compress(data: &[u8], rle: &mut Vec<u8>) { - rle.clear(); - if data.is_empty() { - rle.push(0); // Technically correct. It means read next 0 bytes. - return; - } - // Task: split data into chunks of repeating (max 127) and non-repeating bytes (max 128) - // Prepend non-repeating chunk with its length - // Replace repeating byte with (run length + 128) and the byte - for rnr in NorunCombineIterator::new(data) { - match rnr { - Run(c, len) => { - assert!(len <= 127); - rle.push(128u8 + len as u8); - rle.push(c); - } - Norun(idx, len) => { - assert!(len <= 128); - rle.push(len as u8); - rle.extend_from_slice(&data[idx..idx + len]); - } - } - } -} - -fn write_rgbe8<W: Write>(w: &mut W, v: Rgbe8Pixel) -> Result<()> { - w.write_all(&[v.c[0], v.c[1], v.c[2], v.e]) -} - -/// Converts ```Rgb<f32>``` into ```Rgbe8Pixel``` -pub fn to_rgbe8(pix: Rgb<f32>) -> Rgbe8Pixel { - let pix = pix.0; - let mx = f32::max(pix[0], f32::max(pix[1], pix[2])); - if mx <= 0.0 { - Rgbe8Pixel { c: [0, 0, 0], e: 0 } - } else { - // let (frac, exp) = mx.frexp(); // unstable yet - let exp = mx.log2().floor() as i32 + 1; - let mul = f32::powi(2.0, exp); - let mut conv = [0u8; 3]; - for (cv, &sv) in conv.iter_mut().zip(pix.iter()) { - *cv = f32::trunc(sv / mul * 256.0) as u8; - } - Rgbe8Pixel { - c: conv, - e: (exp + 128) as u8, - } - } -} - -#[test] -fn to_rgbe8_test() { - use crate::codecs::hdr::rgbe8; - let test_cases = vec![rgbe8(0, 0, 0, 0), rgbe8(1, 1, 128, 128)]; - for &pix in &test_cases { - assert_eq!(pix, to_rgbe8(pix.to_hdr())); - } - for mc in 128..255 { - // TODO: use inclusive range when stable - let pix = rgbe8(mc, mc, mc, 100); - assert_eq!(pix, to_rgbe8(pix.to_hdr())); - let pix = rgbe8(mc, 0, mc, 130); - assert_eq!(pix, to_rgbe8(pix.to_hdr())); - let pix = rgbe8(0, 0, mc, 140); - assert_eq!(pix, to_rgbe8(pix.to_hdr())); - let pix = rgbe8(1, 0, mc, 150); - assert_eq!(pix, to_rgbe8(pix.to_hdr())); - let pix = rgbe8(1, mc, 10, 128); - assert_eq!(pix, to_rgbe8(pix.to_hdr())); - for c in 0..255 { - // Radiance HDR seems to be pre IEEE 754. - // exponent can be -128 (represented as 0u8), so some colors cannot be represented in normalized f32 - // Let's exclude exponent value of -128 (0u8) from testing - let pix = rgbe8(1, mc, c, if c == 0 { 1 } else { c }); - assert_eq!(pix, to_rgbe8(pix.to_hdr())); - } - } - fn relative_dist(a: Rgb<f32>, b: Rgb<f32>) -> f32 { - // maximal difference divided by maximal value - let max_diff = - a.0.iter() - .zip(b.0.iter()) - .fold(0.0, |diff, (&a, &b)| f32::max(diff, (a - b).abs())); - let max_val = - a.0.iter() - .chain(b.0.iter()) - .fold(0.0, |maxv, &a| f32::max(maxv, a)); - if max_val == 0.0 { - 0.0 - } else { - max_diff / max_val - } - } - let test_values = vec![ - 0.000_001, 0.000_02, 0.000_3, 0.004, 0.05, 0.6, 7.0, 80.0, 900.0, 1_000.0, 20_000.0, - 300_000.0, - ]; - for &r in &test_values { - for &g in &test_values { - for &b in &test_values { - let c1 = Rgb([r, g, b]); - let c2 = to_rgbe8(c1).to_hdr(); - let rel_dist = relative_dist(c1, c2); - // Maximal value is normalized to the range 128..256, thus we have 1/128 precision - assert!( - rel_dist <= 1.0 / 128.0, - "Relative distance ({}) exceeds 1/128 for {:?} and {:?}", - rel_dist, - c1, - c2 - ); - } - } - } -} - -#[test] -fn runiterator_test() { - let data = []; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), None); - let data = [5]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Norun(0, 1))); - assert_eq!(run_iter.next(), None); - let data = [1, 1]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Norun(0, 2))); - assert_eq!(run_iter.next(), None); - let data = [0, 0, 0]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Run(0u8, 3))); - assert_eq!(run_iter.next(), None); - let data = [0, 0, 1, 1]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Norun(0, 2))); - assert_eq!(run_iter.next(), Some(Norun(2, 2))); - assert_eq!(run_iter.next(), None); - let data = [0, 0, 0, 1, 1]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Run(0u8, 3))); - assert_eq!(run_iter.next(), Some(Norun(3, 2))); - assert_eq!(run_iter.next(), None); - let data = [1, 2, 2, 2]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Norun(0, 1))); - assert_eq!(run_iter.next(), Some(Run(2u8, 3))); - assert_eq!(run_iter.next(), None); - let data = [1, 1, 2, 2, 2]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Norun(0, 2))); - assert_eq!(run_iter.next(), Some(Run(2u8, 3))); - assert_eq!(run_iter.next(), None); - let data = [2; 128]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Run(2u8, 127))); - assert_eq!(run_iter.next(), Some(Norun(127, 1))); - assert_eq!(run_iter.next(), None); - let data = [2; 129]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Run(2u8, 127))); - assert_eq!(run_iter.next(), Some(Norun(127, 2))); - assert_eq!(run_iter.next(), None); - let data = [2; 130]; - let mut run_iter = RunIterator::new(&data[..]); - assert_eq!(run_iter.next(), Some(Run(2u8, 127))); - assert_eq!(run_iter.next(), Some(Run(2u8, 3))); - assert_eq!(run_iter.next(), None); -} - -#[test] -fn noruncombine_test() { - fn a<T>(mut v: Vec<T>, mut other: Vec<T>) -> Vec<T> { - v.append(&mut other); - v - } - - let v = vec![]; - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), None); - - let v = vec![1]; - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Norun(0, 1))); - assert_eq!(rsi.next(), None); - - let v = vec![2, 2]; - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Norun(0, 2))); - assert_eq!(rsi.next(), None); - - let v = vec![3, 3, 3]; - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Run(3, 3))); - assert_eq!(rsi.next(), None); - - let v = vec![4, 4, 3, 3, 3]; - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Norun(0, 2))); - assert_eq!(rsi.next(), Some(Run(3, 3))); - assert_eq!(rsi.next(), None); - - let v = vec![40; 400]; - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Run(40, 127))); - assert_eq!(rsi.next(), Some(Run(40, 127))); - assert_eq!(rsi.next(), Some(Run(40, 127))); - assert_eq!(rsi.next(), Some(Run(40, 19))); - assert_eq!(rsi.next(), None); - - let v = a(a(vec![5; 3], vec![6; 129]), vec![7, 3, 7, 10, 255]); - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Run(5, 3))); - assert_eq!(rsi.next(), Some(Run(6, 127))); - assert_eq!(rsi.next(), Some(Norun(130, 7))); - assert_eq!(rsi.next(), None); - - let v = a(a(vec![5; 2], vec![6; 129]), vec![7, 3, 7, 7, 255]); - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Norun(0, 2))); - assert_eq!(rsi.next(), Some(Run(6, 127))); - assert_eq!(rsi.next(), Some(Norun(129, 7))); - assert_eq!(rsi.next(), None); - - let v: Vec<_> = ::std::iter::repeat(()) - .flat_map(|_| (0..2)) - .take(257) - .collect(); - let mut rsi = NorunCombineIterator::new(&v[..]); - assert_eq!(rsi.next(), Some(Norun(0, 128))); - assert_eq!(rsi.next(), Some(Norun(128, 128))); - assert_eq!(rsi.next(), Some(Norun(256, 1))); - assert_eq!(rsi.next(), None); -} diff --git a/vendor/image/src/codecs/hdr/mod.rs b/vendor/image/src/codecs/hdr/mod.rs deleted file mode 100644 index b3325bc..0000000 --- a/vendor/image/src/codecs/hdr/mod.rs +++ /dev/null @@ -1,15 +0,0 @@ -//! Decoding of Radiance HDR Images -//! -//! A decoder for Radiance HDR images -//! -//! # Related Links -//! -//! * <http://radsite.lbl.gov/radiance/refer/filefmts.pdf> -//! * <http://www.graphics.cornell.edu/~bjw/rgbe/rgbe.c> -//! - -mod decoder; -mod encoder; - -pub use self::decoder::*; -pub use self::encoder::*; diff --git a/vendor/image/src/codecs/ico/decoder.rs b/vendor/image/src/codecs/ico/decoder.rs deleted file mode 100644 index 4f02787..0000000 --- a/vendor/image/src/codecs/ico/decoder.rs +++ /dev/null @@ -1,470 +0,0 @@ -use byteorder::{LittleEndian, ReadBytesExt}; -use std::convert::TryFrom; -use std::io::{self, Cursor, Read, Seek, SeekFrom}; -use std::marker::PhantomData; -use std::{error, fmt, mem}; - -use crate::color::ColorType; -use crate::error::{ - DecodingError, ImageError, ImageResult, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{self, ImageDecoder, ImageFormat}; - -use self::InnerDecoder::*; -use crate::codecs::bmp::BmpDecoder; -use crate::codecs::png::{PngDecoder, PNG_SIGNATURE}; - -/// Errors that can occur during decoding and parsing an ICO image or one of its enclosed images. -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum DecoderError { - /// The ICO directory is empty - NoEntries, - /// The number of color planes (0 or 1), or the horizontal coordinate of the hotspot for CUR files too big. - IcoEntryTooManyPlanesOrHotspot, - /// The bit depth (may be 0 meaning unspecified), or the vertical coordinate of the hotspot for CUR files too big. - IcoEntryTooManyBitsPerPixelOrHotspot, - - /// The entry is in PNG format and specified a length that is shorter than PNG header. - PngShorterThanHeader, - /// The enclosed PNG is not in RGBA, which is invalid: https://blogs.msdn.microsoft.com/oldnewthing/20101022-00/?p=12473/. - PngNotRgba, - - /// The entry is in BMP format and specified a data size that is not correct for the image and optional mask data. - InvalidDataSize, - - /// The dimensions specified by the entry does not match the dimensions in the header of the enclosed image. - ImageEntryDimensionMismatch { - /// The mismatched subimage's type - format: IcoEntryImageFormat, - /// The dimensions specified by the entry - entry: (u16, u16), - /// The dimensions of the image itself - image: (u32, u32), - }, -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::NoEntries => f.write_str("ICO directory contains no image"), - DecoderError::IcoEntryTooManyPlanesOrHotspot => { - f.write_str("ICO image entry has too many color planes or too large hotspot value") - } - DecoderError::IcoEntryTooManyBitsPerPixelOrHotspot => f.write_str( - "ICO image entry has too many bits per pixel or too large hotspot value", - ), - DecoderError::PngShorterThanHeader => { - f.write_str("Entry specified a length that is shorter than PNG header!") - } - DecoderError::PngNotRgba => f.write_str("The PNG is not in RGBA format!"), - DecoderError::InvalidDataSize => { - f.write_str("ICO image data size did not match expected size") - } - DecoderError::ImageEntryDimensionMismatch { - format, - entry, - image, - } => f.write_fmt(format_args!( - "Entry{:?} and {}{:?} dimensions do not match!", - entry, format, image - )), - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::Ico.into(), e)) - } -} - -impl error::Error for DecoderError {} - -/// The image formats an ICO may contain -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum IcoEntryImageFormat { - /// PNG in ARGB - Png, - /// BMP with optional alpha mask - Bmp, -} - -impl fmt::Display for IcoEntryImageFormat { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str(match self { - IcoEntryImageFormat::Png => "PNG", - IcoEntryImageFormat::Bmp => "BMP", - }) - } -} - -impl From<IcoEntryImageFormat> for ImageFormat { - fn from(val: IcoEntryImageFormat) -> Self { - match val { - IcoEntryImageFormat::Png => ImageFormat::Png, - IcoEntryImageFormat::Bmp => ImageFormat::Bmp, - } - } -} - -/// An ico decoder -pub struct IcoDecoder<R: Read> { - selected_entry: DirEntry, - inner_decoder: InnerDecoder<R>, -} - -enum InnerDecoder<R: Read> { - Bmp(BmpDecoder<R>), - Png(Box<PngDecoder<R>>), -} - -#[derive(Clone, Copy, Default)] -struct DirEntry { - width: u8, - height: u8, - // We ignore some header fields as they will be replicated in the PNG, BMP and they are not - // necessary for determining the best_entry. - #[allow(unused)] - color_count: u8, - // Wikipedia has this to say: - // Although Microsoft's technical documentation states that this value must be zero, the icon - // encoder built into .NET (System.Drawing.Icon.Save) sets this value to 255. It appears that - // the operating system ignores this value altogether. - #[allow(unused)] - reserved: u8, - - // We ignore some header fields as they will be replicated in the PNG, BMP and they are not - // necessary for determining the best_entry. - #[allow(unused)] - num_color_planes: u16, - bits_per_pixel: u16, - - image_length: u32, - image_offset: u32, -} - -impl<R: Read + Seek> IcoDecoder<R> { - /// Create a new decoder that decodes from the stream ```r``` - pub fn new(mut r: R) -> ImageResult<IcoDecoder<R>> { - let entries = read_entries(&mut r)?; - let entry = best_entry(entries)?; - let decoder = entry.decoder(r)?; - - Ok(IcoDecoder { - selected_entry: entry, - inner_decoder: decoder, - }) - } -} - -fn read_entries<R: Read>(r: &mut R) -> ImageResult<Vec<DirEntry>> { - let _reserved = r.read_u16::<LittleEndian>()?; - let _type = r.read_u16::<LittleEndian>()?; - let count = r.read_u16::<LittleEndian>()?; - (0..count).map(|_| read_entry(r)).collect() -} - -fn read_entry<R: Read>(r: &mut R) -> ImageResult<DirEntry> { - Ok(DirEntry { - width: r.read_u8()?, - height: r.read_u8()?, - color_count: r.read_u8()?, - reserved: r.read_u8()?, - num_color_planes: { - // This may be either the number of color planes (0 or 1), or the horizontal coordinate - // of the hotspot for CUR files. - let num = r.read_u16::<LittleEndian>()?; - if num > 256 { - return Err(DecoderError::IcoEntryTooManyPlanesOrHotspot.into()); - } - num - }, - bits_per_pixel: { - // This may be either the bit depth (may be 0 meaning unspecified), - // or the vertical coordinate of the hotspot for CUR files. - let num = r.read_u16::<LittleEndian>()?; - if num > 256 { - return Err(DecoderError::IcoEntryTooManyBitsPerPixelOrHotspot.into()); - } - num - }, - image_length: r.read_u32::<LittleEndian>()?, - image_offset: r.read_u32::<LittleEndian>()?, - }) -} - -/// Find the entry with the highest (color depth, size). -fn best_entry(mut entries: Vec<DirEntry>) -> ImageResult<DirEntry> { - let mut best = entries.pop().ok_or(DecoderError::NoEntries)?; - - let mut best_score = ( - best.bits_per_pixel, - u32::from(best.real_width()) * u32::from(best.real_height()), - ); - - for entry in entries { - let score = ( - entry.bits_per_pixel, - u32::from(entry.real_width()) * u32::from(entry.real_height()), - ); - if score > best_score { - best = entry; - best_score = score; - } - } - Ok(best) -} - -impl DirEntry { - fn real_width(&self) -> u16 { - match self.width { - 0 => 256, - w => u16::from(w), - } - } - - fn real_height(&self) -> u16 { - match self.height { - 0 => 256, - h => u16::from(h), - } - } - - fn matches_dimensions(&self, width: u32, height: u32) -> bool { - u32::from(self.real_width()) == width.min(256) - && u32::from(self.real_height()) == height.min(256) - } - - fn seek_to_start<R: Read + Seek>(&self, r: &mut R) -> ImageResult<()> { - r.seek(SeekFrom::Start(u64::from(self.image_offset)))?; - Ok(()) - } - - fn is_png<R: Read + Seek>(&self, r: &mut R) -> ImageResult<bool> { - self.seek_to_start(r)?; - - // Read the first 8 bytes to sniff the image. - let mut signature = [0u8; 8]; - r.read_exact(&mut signature)?; - - Ok(signature == PNG_SIGNATURE) - } - - fn decoder<R: Read + Seek>(&self, mut r: R) -> ImageResult<InnerDecoder<R>> { - let is_png = self.is_png(&mut r)?; - self.seek_to_start(&mut r)?; - - if is_png { - Ok(Png(Box::new(PngDecoder::new(r)?))) - } else { - Ok(Bmp(BmpDecoder::new_with_ico_format(r)?)) - } - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct IcoReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for IcoReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoder<'a> for IcoDecoder<R> { - type Reader = IcoReader<R>; - - fn dimensions(&self) -> (u32, u32) { - match self.inner_decoder { - Bmp(ref decoder) => decoder.dimensions(), - Png(ref decoder) => decoder.dimensions(), - } - } - - fn color_type(&self) -> ColorType { - match self.inner_decoder { - Bmp(ref decoder) => decoder.color_type(), - Png(ref decoder) => decoder.color_type(), - } - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(IcoReader( - Cursor::new(image::decoder_to_vec(self)?), - PhantomData, - )) - } - - fn read_image(self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - match self.inner_decoder { - Png(decoder) => { - if self.selected_entry.image_length < PNG_SIGNATURE.len() as u32 { - return Err(DecoderError::PngShorterThanHeader.into()); - } - - // Check if the image dimensions match the ones in the image data. - let (width, height) = decoder.dimensions(); - if !self.selected_entry.matches_dimensions(width, height) { - return Err(DecoderError::ImageEntryDimensionMismatch { - format: IcoEntryImageFormat::Png, - entry: ( - self.selected_entry.real_width(), - self.selected_entry.real_height(), - ), - image: (width, height), - } - .into()); - } - - // Embedded PNG images can only be of the 32BPP RGBA format. - // https://blogs.msdn.microsoft.com/oldnewthing/20101022-00/?p=12473/ - if decoder.color_type() != ColorType::Rgba8 { - return Err(DecoderError::PngNotRgba.into()); - } - - decoder.read_image(buf) - } - Bmp(mut decoder) => { - let (width, height) = decoder.dimensions(); - if !self.selected_entry.matches_dimensions(width, height) { - return Err(DecoderError::ImageEntryDimensionMismatch { - format: IcoEntryImageFormat::Bmp, - entry: ( - self.selected_entry.real_width(), - self.selected_entry.real_height(), - ), - image: (width, height), - } - .into()); - } - - // The ICO decoder needs an alpha channel to apply the AND mask. - if decoder.color_type() != ColorType::Rgba8 { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Bmp.into(), - UnsupportedErrorKind::Color(decoder.color_type().into()), - ), - )); - } - - decoder.read_image_data(buf)?; - - let r = decoder.reader(); - let image_end = r.stream_position()?; - let data_end = u64::from(self.selected_entry.image_offset) - + u64::from(self.selected_entry.image_length); - - let mask_row_bytes = ((width + 31) / 32) * 4; - let mask_length = u64::from(mask_row_bytes) * u64::from(height); - - // data_end should be image_end + the mask length (mask_row_bytes * height). - // According to - // https://devblogs.microsoft.com/oldnewthing/20101021-00/?p=12483 - // the mask is required, but according to Wikipedia - // https://en.wikipedia.org/wiki/ICO_(file_format) - // the mask is not required. Unfortunately, Wikipedia does not have a citation - // for that claim, so we can't be sure which is correct. - if data_end >= image_end + mask_length { - // If there's an AND mask following the image, read and apply it. - for y in 0..height { - let mut x = 0; - for _ in 0..mask_row_bytes { - // Apply the bits of each byte until we reach the end of the row. - let mask_byte = r.read_u8()?; - for bit in (0..8).rev() { - if x >= width { - break; - } - if mask_byte & (1 << bit) != 0 { - // Set alpha channel to transparent. - buf[((height - y - 1) * width + x) as usize * 4 + 3] = 0; - } - x += 1; - } - } - } - - Ok(()) - } else if data_end == image_end { - // accept images with no mask data - Ok(()) - } else { - Err(DecoderError::InvalidDataSize.into()) - } - } - } - } -} - -#[cfg(test)] -mod test { - use super::*; - - // Test if BMP images without alpha channel inside ICOs don't panic. - // Because the test data is invalid decoding should produce an error. - #[test] - fn bmp_16_with_missing_alpha_channel() { - let data = vec![ - 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x0e, 0x04, 0xc3, 0x7e, 0x00, 0x00, 0x00, 0x00, - 0x7c, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x00, 0x00, 0xf8, 0xff, 0xff, 0xff, 0x01, 0x00, - 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x8f, 0xf6, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x20, 0x66, 0x74, 0x83, 0x70, 0x61, 0x76, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, - 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xeb, 0x00, 0x9b, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4e, 0x47, 0x0d, - 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x62, 0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x0c, - 0x00, 0x00, 0x00, 0xc3, 0x3f, 0x94, 0x61, 0xaa, 0x17, 0x4d, 0x8d, 0x79, 0x1d, 0x8b, - 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, 0x2e, 0x28, 0x40, 0xe5, 0x9f, - 0x4b, 0x4d, 0xe9, 0x87, 0xd3, 0xda, 0xd6, 0x89, 0x81, 0xc5, 0xa4, 0xa1, 0x60, 0x98, - 0x31, 0xc7, 0x1d, 0xb6, 0x8f, 0x20, 0xc8, 0x3e, 0xee, 0xd8, 0xe4, 0x8f, 0xee, 0x7b, - 0x48, 0x9b, 0x88, 0x25, 0x13, 0xda, 0xa4, 0x13, 0xa4, 0x00, 0x00, 0x00, 0x00, 0x40, - 0x16, 0x01, 0xff, 0xff, 0xff, 0xff, 0xe9, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0xa3, 0x66, 0x64, 0x41, 0x54, 0xa3, 0xa3, 0x00, 0x00, 0x00, 0xb8, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa3, 0x66, 0x64, 0x41, 0x54, 0xa3, 0xa3, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0xf6, 0xff, 0xff, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x66, 0x74, 0x83, 0x70, 0x61, 0x76, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, - 0xeb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x62, 0x49, - 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, - 0x00, 0x00, 0x00, 0xff, 0xff, 0x94, 0xc8, 0x00, 0x02, 0x0c, 0x00, 0xff, 0xff, 0xc6, - 0x84, 0x00, 0x2a, 0x75, 0x03, 0xa3, 0x05, 0xfb, 0xe1, 0x6e, 0xe8, 0x27, 0xd6, 0xd3, - 0x96, 0xc1, 0xe4, 0x30, 0x0c, 0x05, 0xb9, 0xa3, 0x8b, 0x29, 0xda, 0xa4, 0xf1, 0x4d, - 0xf3, 0xb2, 0x98, 0x2b, 0xe6, 0x93, 0x07, 0xf9, 0xca, 0x2b, 0xc2, 0x39, 0x20, 0xba, - 0x7c, 0xa0, 0xb1, 0x43, 0xe6, 0xf9, 0xdc, 0xd1, 0xc2, 0x52, 0xdc, 0x41, 0xc1, 0x2f, - 0x29, 0xf7, 0x46, 0x32, 0xda, 0x1b, 0x72, 0x8c, 0xe6, 0x2b, 0x01, 0xe5, 0x49, 0x21, - 0x89, 0x89, 0xe4, 0x3d, 0xa1, 0xdb, 0x3b, 0x4a, 0x0b, 0x52, 0x86, 0x52, 0x33, 0x9d, - 0xb2, 0xcf, 0x4a, 0x86, 0x53, 0xd7, 0xa9, 0x4b, 0xaf, 0x62, 0x06, 0x49, 0x53, 0x00, - 0xc3, 0x3f, 0x94, 0x61, 0xaa, 0x17, 0x4d, 0x8d, 0x79, 0x1d, 0x8b, 0x10, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, 0x2e, 0x28, 0x40, 0xe5, 0x9f, 0x4b, 0x4d, 0xe9, - 0x87, 0xd3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe7, 0xc5, 0x00, - 0x02, 0x00, 0x00, 0x00, 0x06, 0x00, 0x0b, 0x00, 0x50, 0x31, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x76, 0x76, 0x01, 0x00, 0x00, 0x00, 0x76, 0x00, - 0x00, 0x23, 0x3f, 0x52, 0x41, 0x44, 0x49, 0x41, 0x4e, 0x43, 0x45, 0x61, 0x50, 0x35, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x4d, 0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x05, - 0x50, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc7, 0x37, 0x61, - ]; - - let decoder = IcoDecoder::new(Cursor::new(&data)).unwrap(); - let mut buf = vec![0; usize::try_from(decoder.total_bytes()).unwrap()]; - assert!(decoder.read_image(&mut buf).is_err()); - } -} diff --git a/vendor/image/src/codecs/ico/encoder.rs b/vendor/image/src/codecs/ico/encoder.rs deleted file mode 100644 index dd5961b..0000000 --- a/vendor/image/src/codecs/ico/encoder.rs +++ /dev/null @@ -1,194 +0,0 @@ -use byteorder::{LittleEndian, WriteBytesExt}; -use std::borrow::Cow; -use std::io::{self, Write}; - -use crate::color::ColorType; -use crate::error::{ImageError, ImageResult, ParameterError, ParameterErrorKind}; -use crate::image::ImageEncoder; - -use crate::codecs::png::PngEncoder; - -// Enum value indicating an ICO image (as opposed to a CUR image): -const ICO_IMAGE_TYPE: u16 = 1; -// The length of an ICO file ICONDIR structure, in bytes: -const ICO_ICONDIR_SIZE: u32 = 6; -// The length of an ICO file DIRENTRY structure, in bytes: -const ICO_DIRENTRY_SIZE: u32 = 16; - -/// ICO encoder -pub struct IcoEncoder<W: Write> { - w: W, -} - -/// An ICO image entry -pub struct IcoFrame<'a> { - // Pre-encoded PNG or BMP - encoded_image: Cow<'a, [u8]>, - // Stored as `0 => 256, n => n` - width: u8, - // Stored as `0 => 256, n => n` - height: u8, - color_type: ColorType, -} - -impl<'a> IcoFrame<'a> { - /// Construct a new `IcoFrame` using a pre-encoded PNG or BMP - /// - /// The `width` and `height` must be between 1 and 256 (inclusive). - pub fn with_encoded( - encoded_image: impl Into<Cow<'a, [u8]>>, - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<Self> { - let encoded_image = encoded_image.into(); - - if !(1..=256).contains(&width) { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic(format!( - "the image width must be `1..=256`, instead width {} was provided", - width, - )), - ))); - } - - if !(1..=256).contains(&height) { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic(format!( - "the image height must be `1..=256`, instead height {} was provided", - height, - )), - ))); - } - - Ok(Self { - encoded_image, - width: width as u8, - height: height as u8, - color_type, - }) - } - - /// Construct a new `IcoFrame` by encoding `buf` as a PNG - /// - /// The `width` and `height` must be between 1 and 256 (inclusive) - pub fn as_png(buf: &[u8], width: u32, height: u32, color_type: ColorType) -> ImageResult<Self> { - let mut image_data: Vec<u8> = Vec::new(); - PngEncoder::new(&mut image_data).write_image(buf, width, height, color_type)?; - - let frame = Self::with_encoded(image_data, width, height, color_type)?; - Ok(frame) - } -} - -impl<W: Write> IcoEncoder<W> { - /// Create a new encoder that writes its output to ```w```. - pub fn new(w: W) -> IcoEncoder<W> { - IcoEncoder { w } - } - - /// Encodes the image ```image``` that has dimensions ```width``` and - /// ```height``` and ```ColorType``` ```c```. The dimensions of the image - /// must be between 1 and 256 (inclusive) or an error will be returned. - /// - /// Expects data to be big endian. - #[deprecated = "Use `IcoEncoder::write_image` instead. Beware that `write_image` has a different endianness convention"] - pub fn encode(self, data: &[u8], width: u32, height: u32, color: ColorType) -> ImageResult<()> { - let mut image_data: Vec<u8> = Vec::new(); - #[allow(deprecated)] - PngEncoder::new(&mut image_data).encode(data, width, height, color)?; - - let image = IcoFrame::with_encoded(&image_data, width, height, color)?; - self.encode_images(&[image]) - } - - /// Takes some [`IcoFrame`]s and encodes them into an ICO. - /// - /// `images` is a list of images, usually ordered by dimension, which - /// must be between 1 and 65535 (inclusive) in length. - pub fn encode_images(mut self, images: &[IcoFrame<'_>]) -> ImageResult<()> { - if !(1..=usize::from(u16::MAX)).contains(&images.len()) { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic(format!( - "the number of images must be `1..=u16::MAX`, instead {} images were provided", - images.len(), - )), - ))); - } - let num_images = images.len() as u16; - - let mut offset = ICO_ICONDIR_SIZE + (ICO_DIRENTRY_SIZE * (images.len() as u32)); - write_icondir(&mut self.w, num_images)?; - for image in images { - write_direntry( - &mut self.w, - image.width, - image.height, - image.color_type, - offset, - image.encoded_image.len() as u32, - )?; - - offset += image.encoded_image.len() as u32; - } - for image in images { - self.w.write_all(&image.encoded_image)?; - } - Ok(()) - } -} - -impl<W: Write> ImageEncoder for IcoEncoder<W> { - /// Write an ICO image with the specified width, height, and color type. - /// - /// For color types with 16-bit per channel or larger, the contents of `buf` should be in - /// native endian. - /// - /// WARNING: In image 0.23.14 and earlier this method erroneously expected buf to be in big endian. - fn write_image( - self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - let image = IcoFrame::as_png(buf, width, height, color_type)?; - self.encode_images(&[image]) - } -} - -fn write_icondir<W: Write>(w: &mut W, num_images: u16) -> io::Result<()> { - // Reserved field (must be zero): - w.write_u16::<LittleEndian>(0)?; - // Image type (ICO or CUR): - w.write_u16::<LittleEndian>(ICO_IMAGE_TYPE)?; - // Number of images in the file: - w.write_u16::<LittleEndian>(num_images)?; - Ok(()) -} - -fn write_direntry<W: Write>( - w: &mut W, - width: u8, - height: u8, - color: ColorType, - data_start: u32, - data_size: u32, -) -> io::Result<()> { - // Image dimensions: - w.write_u8(width)?; - w.write_u8(height)?; - // Number of colors in palette (or zero for no palette): - w.write_u8(0)?; - // Reserved field (must be zero): - w.write_u8(0)?; - // Color planes: - w.write_u16::<LittleEndian>(0)?; - // Bits per pixel: - w.write_u16::<LittleEndian>(color.bits_per_pixel())?; - // Image data size, in bytes: - w.write_u32::<LittleEndian>(data_size)?; - // Image data offset, in bytes: - w.write_u32::<LittleEndian>(data_start)?; - Ok(()) -} diff --git a/vendor/image/src/codecs/ico/mod.rs b/vendor/image/src/codecs/ico/mod.rs deleted file mode 100644 index 11493ac..0000000 --- a/vendor/image/src/codecs/ico/mod.rs +++ /dev/null @@ -1,14 +0,0 @@ -//! Decoding and Encoding of ICO files -//! -//! A decoder and encoder for ICO (Windows Icon) image container files. -//! -//! # Related Links -//! * <https://msdn.microsoft.com/en-us/library/ms997538.aspx> -//! * <https://en.wikipedia.org/wiki/ICO_%28file_format%29> - -pub use self::decoder::IcoDecoder; -#[allow(deprecated)] -pub use self::encoder::{IcoEncoder, IcoFrame}; - -mod decoder; -mod encoder; diff --git a/vendor/image/src/codecs/jpeg/decoder.rs b/vendor/image/src/codecs/jpeg/decoder.rs deleted file mode 100644 index 9625e33..0000000 --- a/vendor/image/src/codecs/jpeg/decoder.rs +++ /dev/null @@ -1,1289 +0,0 @@ -use std::convert::TryFrom; -use std::io::{self, Cursor, Read}; -use std::marker::PhantomData; -use std::mem; - -use crate::color::ColorType; -use crate::error::{ - DecodingError, ImageError, ImageResult, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{ImageDecoder, ImageFormat}; - -/// JPEG decoder -pub struct JpegDecoder<R> { - decoder: jpeg::Decoder<R>, - metadata: jpeg::ImageInfo, -} - -impl<R: Read> JpegDecoder<R> { - /// Create a new decoder that decodes from the stream ```r``` - pub fn new(r: R) -> ImageResult<JpegDecoder<R>> { - let mut decoder = jpeg::Decoder::new(r); - - decoder.read_info().map_err(ImageError::from_jpeg)?; - let mut metadata = decoder.info().ok_or_else(|| { - ImageError::Decoding(DecodingError::from_format_hint(ImageFormat::Jpeg.into())) - })?; - - // We convert CMYK data to RGB before returning it to the user. - if metadata.pixel_format == jpeg::PixelFormat::CMYK32 { - metadata.pixel_format = jpeg::PixelFormat::RGB24; - } - - Ok(JpegDecoder { decoder, metadata }) - } - - /// Configure the decoder to scale the image during decoding. - /// - /// This efficiently scales the image by the smallest supported - /// scale factor that produces an image larger than or equal to - /// the requested size in at least one axis. The currently - /// implemented scale factors are 1/8, 1/4, 1/2 and 1. - /// - /// To generate a thumbnail of an exact size, pass the desired - /// size and then scale to the final size using a traditional - /// resampling algorithm. - /// - /// The size of the image to be loaded, with the scale factor - /// applied, is returned. - pub fn scale( - &mut self, - requested_width: u16, - requested_height: u16, - ) -> ImageResult<(u16, u16)> { - let result = self - .decoder - .scale(requested_width, requested_height) - .map_err(ImageError::from_jpeg)?; - - self.metadata.width = result.0; - self.metadata.height = result.1; - - Ok(result) - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct JpegReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for JpegReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for JpegDecoder<R> { - type Reader = JpegReader<R>; - - fn dimensions(&self) -> (u32, u32) { - ( - u32::from(self.metadata.width), - u32::from(self.metadata.height), - ) - } - - fn color_type(&self) -> ColorType { - ColorType::from_jpeg(self.metadata.pixel_format) - } - - fn icc_profile(&mut self) -> Option<Vec<u8>> { - self.decoder.icc_profile() - } - - fn into_reader(mut self) -> ImageResult<Self::Reader> { - let mut data = self.decoder.decode().map_err(ImageError::from_jpeg)?; - data = match self.decoder.info().unwrap().pixel_format { - jpeg::PixelFormat::CMYK32 => cmyk_to_rgb(&data), - _ => data, - }; - - Ok(JpegReader(Cursor::new(data), PhantomData)) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - - let mut data = self.decoder.decode().map_err(ImageError::from_jpeg)?; - data = match self.decoder.info().unwrap().pixel_format { - jpeg::PixelFormat::CMYK32 => cmyk_to_rgb(&data), - _ => data, - }; - - buf.copy_from_slice(&data); - Ok(()) - } -} - -fn cmyk_to_rgb(input: &[u8]) -> Vec<u8> { - let count = input.len() / 4; - let mut output = vec![0; 3 * count]; - - let in_pixels = input[..4 * count].chunks_exact(4); - let out_pixels = output[..3 * count].chunks_exact_mut(3); - - for (pixel, outp) in in_pixels.zip(out_pixels) { - let c = 255 - u16::from(pixel[0]); - let m = 255 - u16::from(pixel[1]); - let y = 255 - u16::from(pixel[2]); - let k = 255 - u16::from(pixel[3]); - // CMY -> RGB - let r = (k * c) / 255; - let g = (k * m) / 255; - let b = (k * y) / 255; - - outp[0] = r as u8; - outp[1] = g as u8; - outp[2] = b as u8; - } - - output -} - -impl ColorType { - fn from_jpeg(pixel_format: jpeg::PixelFormat) -> ColorType { - use jpeg::PixelFormat::*; - match pixel_format { - L8 => ColorType::L8, - L16 => ColorType::L16, - RGB24 => ColorType::Rgb8, - CMYK32 => panic!(), - } - } -} - -impl ImageError { - fn from_jpeg(err: jpeg::Error) -> ImageError { - use jpeg::Error::*; - match err { - err @ Format(_) => { - ImageError::Decoding(DecodingError::new(ImageFormat::Jpeg.into(), err)) - } - Unsupported(desc) => ImageError::Unsupported(UnsupportedError::from_format_and_kind( - ImageFormat::Jpeg.into(), - UnsupportedErrorKind::GenericFeature(format!("{:?}", desc)), - )), - Io(err) => ImageError::IoError(err), - Internal(err) => { - ImageError::Decoding(DecodingError::new(ImageFormat::Jpeg.into(), err)) - } - } - } -} - -#[cfg(test)] -mod tests { - #[cfg(feature = "benchmarks")] - extern crate test; - - use super::cmyk_to_rgb; - #[cfg(feature = "benchmarks")] - use test::Bencher; - - #[cfg(feature = "benchmarks")] - const W: usize = 256; - #[cfg(feature = "benchmarks")] - const H: usize = 256; - - #[test] - fn cmyk_to_rgb_correct() { - for c in 0..=255 { - for k in 0..=255 { - // Based on R = 255 * (1-C/255) * (1-K/255) - let r = (255.0 - f32::from(c)) * (255.0 - f32::from(k)) / 255.0; - let r_u8 = r as u8; - let convert_r = cmyk_to_rgb(&[c, 0, 0, k])[0]; - let convert_g = cmyk_to_rgb(&[0, c, 0, k])[1]; - let convert_b = cmyk_to_rgb(&[0, 0, c, k])[2]; - - assert_eq!( - convert_r, r_u8, - "c = {}, k = {}, cymk_to_rgb[0] = {}, should be {}", - c, k, convert_r, r_u8 - ); - assert_eq!( - convert_g, r_u8, - "m = {}, k = {}, cymk_to_rgb[1] = {}, should be {}", - c, k, convert_g, r_u8 - ); - assert_eq!( - convert_b, r_u8, - "y = {}, k = {}, cymk_to_rgb[2] = {}, should be {}", - c, k, convert_b, r_u8 - ); - } - } - } - - fn single_pix_correct(cmyk_pix: [u8; 4], rgb_pix_true: [u8; 3]) { - let rgb_pix = cmyk_to_rgb(&cmyk_pix); - assert_eq!( - rgb_pix_true[0], rgb_pix[0], - "With CMYK {:?} expected {:?}, got {:?}", - cmyk_pix, rgb_pix_true, rgb_pix - ); - assert_eq!( - rgb_pix_true[1], rgb_pix[1], - "With CMYK {:?} expected {:?}, got {:?}", - cmyk_pix, rgb_pix_true, rgb_pix - ); - assert_eq!( - rgb_pix_true[2], rgb_pix[2], - "With CMYK {:?} expected {:?}, got {:?}", - cmyk_pix, rgb_pix_true, rgb_pix - ); - } - - #[test] - fn test_assorted_colors() { - let cmyk_pixels = vec![ - [0, 51, 102, 65], - [153, 204, 0, 65], - [0, 0, 0, 67], - [0, 85, 170, 69], - [0, 0, 0, 71], - [0, 0, 0, 73], - [0, 17, 34, 75], - [51, 68, 85, 75], - [102, 119, 136, 75], - [153, 170, 187, 75], - [204, 221, 238, 75], - [0, 0, 0, 77], - [0, 0, 0, 79], - [0, 85, 170, 81], - [0, 0, 0, 83], - [0, 3, 6, 85], - [9, 12, 15, 85], - [18, 21, 24, 85], - [27, 30, 33, 85], - [36, 39, 42, 85], - [45, 48, 51, 85], - [54, 57, 60, 85], - [63, 66, 69, 85], - [72, 75, 78, 85], - [81, 84, 87, 85], - [90, 93, 96, 85], - [99, 102, 105, 85], - [108, 111, 114, 85], - [117, 120, 123, 85], - [126, 129, 132, 85], - [135, 138, 141, 85], - [144, 147, 150, 85], - [153, 156, 159, 85], - [162, 165, 168, 85], - [171, 174, 177, 85], - [180, 183, 186, 85], - [189, 192, 195, 85], - [198, 201, 204, 85], - [207, 210, 213, 85], - [216, 219, 222, 85], - [225, 228, 231, 85], - [234, 237, 240, 85], - [243, 246, 249, 85], - [252, 0, 0, 85], - [0, 85, 170, 87], - [0, 0, 0, 89], - [0, 0, 0, 91], - [0, 85, 170, 93], - [0, 51, 102, 95], - [153, 204, 0, 95], - [0, 0, 0, 97], - [0, 85, 170, 99], - [0, 0, 0, 101], - [0, 0, 0, 103], - [0, 17, 34, 105], - [51, 68, 85, 105], - [102, 119, 136, 105], - [153, 170, 187, 105], - [204, 221, 238, 105], - [0, 0, 0, 107], - [0, 0, 0, 109], - [0, 85, 170, 111], - [0, 0, 0, 113], - [0, 51, 102, 115], - [153, 204, 0, 115], - [0, 85, 170, 117], - [0, 15, 30, 119], - [45, 60, 75, 119], - [90, 105, 120, 119], - [135, 150, 165, 119], - [180, 195, 210, 119], - [225, 240, 0, 119], - [0, 0, 0, 121], - [0, 85, 170, 123], - [0, 51, 102, 125], - [153, 204, 0, 125], - [0, 0, 0, 127], - [0, 0, 0, 128], - [0, 85, 170, 129], - [0, 51, 102, 130], - [153, 204, 0, 130], - [0, 0, 0, 131], - [0, 85, 170, 132], - [0, 0, 0, 133], - [0, 0, 0, 134], - [0, 17, 34, 135], - [51, 68, 85, 135], - [102, 119, 136, 135], - [153, 170, 187, 135], - [204, 221, 238, 135], - [0, 15, 30, 136], - [45, 60, 75, 136], - [90, 105, 120, 136], - [135, 150, 165, 136], - [180, 195, 210, 136], - [225, 240, 0, 136], - [0, 0, 0, 137], - [0, 85, 170, 138], - [0, 0, 0, 139], - [0, 51, 102, 140], - [153, 204, 0, 140], - [0, 85, 170, 141], - [0, 0, 0, 142], - [0, 0, 0, 143], - [0, 85, 170, 144], - [0, 51, 102, 145], - [153, 204, 0, 145], - [0, 0, 0, 146], - [0, 85, 170, 147], - [0, 0, 0, 148], - [0, 0, 0, 149], - [0, 17, 34, 150], - [51, 68, 85, 150], - [102, 119, 136, 150], - [153, 170, 187, 150], - [204, 221, 238, 150], - [0, 0, 0, 151], - [0, 0, 0, 152], - [0, 5, 10, 153], - [15, 20, 25, 153], - [30, 35, 40, 153], - [45, 50, 55, 153], - [60, 65, 70, 153], - [75, 80, 85, 153], - [90, 95, 100, 153], - [105, 110, 115, 153], - [120, 125, 130, 153], - [135, 140, 145, 153], - [150, 155, 160, 153], - [165, 170, 175, 153], - [180, 185, 190, 153], - [195, 200, 205, 153], - [210, 215, 220, 153], - [225, 230, 235, 153], - [240, 245, 250, 153], - [0, 0, 0, 154], - [0, 51, 102, 155], - [153, 204, 0, 155], - [0, 85, 170, 156], - [0, 0, 0, 157], - [0, 0, 0, 158], - [0, 85, 170, 159], - [0, 51, 102, 160], - [153, 204, 0, 160], - [0, 0, 0, 161], - [0, 85, 170, 162], - [0, 0, 0, 163], - [0, 0, 0, 164], - [0, 17, 34, 165], - [51, 68, 85, 165], - [102, 119, 136, 165], - [153, 170, 187, 165], - [204, 221, 238, 165], - [0, 0, 0, 166], - [0, 0, 0, 167], - [0, 85, 170, 168], - [0, 0, 0, 169], - [0, 3, 6, 170], - [9, 12, 15, 170], - [18, 21, 24, 170], - [27, 30, 33, 170], - [36, 39, 42, 170], - [45, 48, 51, 170], - [54, 57, 60, 170], - [63, 66, 69, 170], - [72, 75, 78, 170], - [81, 84, 87, 170], - [90, 93, 96, 170], - [99, 102, 105, 170], - [108, 111, 114, 170], - [117, 120, 123, 170], - [126, 129, 132, 170], - [135, 138, 141, 170], - [144, 147, 150, 170], - [153, 156, 159, 170], - [162, 165, 168, 170], - [171, 174, 177, 170], - [180, 183, 186, 170], - [189, 192, 195, 170], - [198, 201, 204, 170], - [207, 210, 213, 170], - [216, 219, 222, 170], - [225, 228, 231, 170], - [234, 237, 240, 170], - [243, 246, 249, 170], - [252, 0, 0, 170], - [0, 85, 170, 171], - [0, 0, 0, 172], - [0, 0, 0, 173], - [0, 85, 170, 174], - [0, 51, 102, 175], - [153, 204, 0, 175], - [0, 0, 0, 176], - [0, 85, 170, 177], - [0, 0, 0, 178], - [0, 0, 0, 179], - [0, 17, 34, 180], - [51, 68, 85, 180], - [102, 119, 136, 180], - [153, 170, 187, 180], - [204, 221, 238, 180], - [0, 0, 0, 181], - [0, 0, 0, 182], - [0, 85, 170, 183], - [0, 0, 0, 184], - [0, 51, 102, 185], - [153, 204, 0, 185], - [0, 85, 170, 186], - [0, 15, 30, 187], - [45, 60, 75, 187], - [90, 105, 120, 187], - [135, 150, 165, 187], - [180, 195, 210, 187], - [225, 240, 0, 187], - [0, 0, 0, 188], - [0, 85, 170, 189], - [0, 51, 102, 190], - [153, 204, 0, 190], - [0, 0, 0, 191], - [0, 85, 170, 192], - [0, 0, 0, 193], - [0, 0, 0, 194], - [0, 17, 34, 195], - [51, 68, 85, 195], - [102, 119, 136, 195], - [153, 170, 187, 195], - [204, 221, 238, 195], - [0, 0, 0, 196], - [0, 0, 0, 197], - [0, 85, 170, 198], - [0, 0, 0, 199], - [0, 51, 102, 200], - [153, 204, 0, 200], - [0, 85, 170, 201], - [0, 0, 0, 202], - [0, 0, 0, 203], - [0, 5, 10, 204], - [15, 20, 25, 204], - [30, 35, 40, 204], - [45, 50, 55, 204], - [60, 65, 70, 204], - [75, 80, 85, 204], - [90, 95, 100, 204], - [105, 110, 115, 204], - [120, 125, 130, 204], - [135, 140, 145, 204], - [150, 155, 160, 204], - [165, 170, 175, 204], - [180, 185, 190, 204], - [195, 200, 205, 204], - [210, 215, 220, 204], - [225, 230, 235, 204], - [240, 245, 250, 204], - [0, 51, 102, 205], - [153, 204, 0, 205], - [0, 0, 0, 206], - [0, 85, 170, 207], - [0, 0, 0, 208], - [0, 0, 0, 209], - [0, 17, 34, 210], - [51, 68, 85, 210], - [102, 119, 136, 210], - [153, 170, 187, 210], - [204, 221, 238, 210], - [0, 0, 0, 211], - [0, 0, 0, 212], - [0, 85, 170, 213], - [0, 0, 0, 214], - [0, 51, 102, 215], - [153, 204, 0, 215], - [0, 85, 170, 216], - [0, 0, 0, 217], - [0, 0, 0, 218], - [0, 85, 170, 219], - [0, 51, 102, 220], - [153, 204, 0, 220], - [0, 15, 30, 221], - [45, 60, 75, 221], - [90, 105, 120, 221], - [135, 150, 165, 221], - [180, 195, 210, 221], - [225, 240, 0, 221], - [0, 85, 170, 222], - [0, 0, 0, 223], - [0, 0, 0, 224], - [0, 17, 34, 225], - [51, 68, 85, 225], - [102, 119, 136, 225], - [153, 170, 187, 225], - [204, 221, 238, 225], - [0, 0, 0, 226], - [0, 0, 0, 227], - [0, 85, 170, 228], - [0, 0, 0, 229], - [0, 51, 102, 230], - [153, 204, 0, 230], - [0, 85, 170, 231], - [0, 0, 0, 232], - [0, 0, 0, 233], - [0, 85, 170, 234], - [0, 51, 102, 235], - [153, 204, 0, 235], - [0, 0, 0, 236], - [0, 85, 170, 237], - [0, 15, 30, 238], - [45, 60, 75, 238], - [90, 105, 120, 238], - [135, 150, 165, 238], - [180, 195, 210, 238], - [225, 240, 0, 238], - [0, 0, 0, 239], - [0, 17, 34, 240], - [51, 68, 85, 240], - [102, 119, 136, 240], - [153, 170, 187, 240], - [204, 221, 238, 240], - [0, 0, 0, 241], - [0, 0, 0, 242], - [0, 85, 170, 243], - [0, 0, 0, 244], - [0, 51, 102, 245], - [153, 204, 0, 245], - [0, 85, 170, 246], - [0, 0, 0, 247], - [0, 0, 0, 248], - [0, 85, 170, 249], - [0, 51, 102, 250], - [153, 204, 0, 250], - [0, 0, 0, 251], - [0, 85, 170, 252], - [0, 0, 0, 253], - [0, 0, 0, 254], - [5, 15, 25, 102], - [35, 40, 45, 102], - [50, 55, 60, 102], - [65, 70, 75, 102], - [80, 85, 90, 102], - [95, 100, 105, 102], - [110, 115, 120, 102], - [125, 130, 135, 102], - [140, 145, 150, 102], - [155, 160, 165, 102], - [170, 175, 180, 102], - [185, 190, 195, 102], - [200, 205, 210, 102], - [215, 220, 225, 102], - [230, 235, 240, 102], - [245, 250, 0, 102], - [15, 45, 60, 68], - [75, 90, 105, 68], - [120, 135, 150, 68], - [165, 180, 195, 68], - [210, 225, 240, 68], - [17, 34, 51, 45], - [68, 85, 102, 45], - [119, 136, 153, 45], - [170, 187, 204, 45], - [221, 238, 0, 45], - [17, 51, 68, 60], - [85, 102, 119, 60], - [136, 153, 170, 60], - [187, 204, 221, 60], - [238, 0, 0, 60], - [17, 34, 51, 90], - [68, 85, 102, 90], - [119, 136, 153, 90], - [170, 187, 204, 90], - [221, 238, 0, 90], - [17, 34, 51, 120], - [68, 85, 102, 120], - [119, 136, 153, 120], - [170, 187, 204, 120], - [221, 238, 0, 120], - [20, 25, 30, 51], - [35, 40, 45, 51], - [50, 55, 60, 51], - [65, 70, 75, 51], - [80, 85, 90, 51], - [95, 100, 105, 51], - [110, 115, 120, 51], - [125, 130, 135, 51], - [140, 145, 150, 51], - [155, 160, 165, 51], - [170, 175, 180, 51], - [185, 190, 195, 51], - [200, 205, 210, 51], - [215, 220, 225, 51], - [230, 235, 240, 51], - [245, 250, 0, 51], - [45, 60, 75, 17], - [90, 105, 120, 17], - [135, 150, 165, 17], - [180, 195, 210, 17], - [225, 240, 0, 17], - [45, 75, 90, 34], - [105, 120, 135, 34], - [150, 165, 180, 34], - [195, 210, 225, 34], - [240, 0, 0, 34], - [51, 153, 204, 20], - [51, 102, 153, 25], - [204, 0, 0, 25], - [51, 85, 119, 30], - [136, 153, 170, 30], - [187, 204, 221, 30], - [238, 0, 0, 30], - [51, 102, 153, 35], - [204, 0, 0, 35], - [51, 102, 153, 40], - [204, 0, 0, 40], - [51, 102, 153, 50], - [204, 0, 0, 50], - [51, 102, 153, 55], - [204, 0, 0, 55], - [51, 102, 153, 70], - [204, 0, 0, 70], - [51, 102, 153, 80], - [204, 0, 0, 80], - [51, 102, 153, 100], - [204, 0, 0, 100], - [51, 102, 153, 110], - [204, 0, 0, 110], - [65, 67, 69, 0], - [71, 73, 75, 0], - [77, 79, 81, 0], - [83, 85, 87, 0], - [89, 91, 93, 0], - [95, 97, 99, 0], - [101, 103, 105, 0], - [107, 109, 111, 0], - [113, 115, 117, 0], - [119, 121, 123, 0], - [125, 127, 128, 0], - [129, 130, 131, 0], - [132, 133, 134, 0], - [135, 136, 137, 0], - [138, 139, 140, 0], - [141, 142, 143, 0], - [144, 145, 146, 0], - [147, 148, 149, 0], - [150, 151, 152, 0], - [153, 154, 155, 0], - [156, 157, 158, 0], - [159, 160, 161, 0], - [162, 163, 164, 0], - [165, 166, 167, 0], - [168, 169, 170, 0], - [171, 172, 173, 0], - [174, 175, 176, 0], - [177, 178, 179, 0], - [180, 181, 182, 0], - [183, 184, 185, 0], - [186, 187, 188, 0], - [189, 190, 191, 0], - [192, 193, 194, 0], - [195, 196, 197, 0], - [198, 199, 200, 0], - [201, 202, 203, 0], - [204, 205, 206, 0], - [207, 208, 209, 0], - [210, 211, 212, 0], - [213, 214, 215, 0], - [216, 217, 218, 0], - [219, 220, 221, 0], - [222, 223, 224, 0], - [225, 226, 227, 0], - [228, 229, 230, 0], - [231, 232, 233, 0], - [234, 235, 236, 0], - [237, 238, 239, 0], - [240, 241, 242, 0], - [243, 244, 245, 0], - [246, 247, 248, 0], - [249, 250, 251, 0], - [252, 253, 254, 0], - [68, 85, 102, 15], - [119, 136, 153, 15], - [170, 187, 204, 15], - [221, 238, 0, 15], - [85, 170, 0, 3], - [85, 170, 0, 6], - [85, 170, 0, 9], - [85, 170, 0, 12], - [85, 170, 0, 18], - [85, 170, 0, 21], - [85, 170, 0, 24], - [85, 170, 0, 27], - [85, 170, 0, 33], - [85, 170, 0, 36], - [85, 170, 0, 39], - [85, 170, 0, 42], - [85, 170, 0, 48], - [85, 170, 0, 54], - [85, 170, 0, 57], - [85, 170, 0, 63], - [85, 170, 0, 66], - [85, 170, 0, 72], - [85, 170, 0, 78], - [85, 170, 0, 84], - [85, 170, 0, 96], - [85, 170, 0, 108], - [85, 170, 0, 114], - [85, 170, 0, 126], - [102, 153, 204, 5], - [153, 204, 0, 10], - ]; - let rgb_pixels = vec![ - [190, 152, 114], - [76, 38, 190], - [188, 188, 188], - [186, 124, 62], - [184, 184, 184], - [182, 182, 182], - [180, 168, 156], - [144, 132, 120], - [108, 96, 84], - [72, 60, 48], - [36, 24, 12], - [178, 178, 178], - [176, 176, 176], - [174, 116, 58], - [172, 172, 172], - [170, 168, 166], - [164, 162, 160], - [158, 156, 154], - [152, 150, 148], - [146, 144, 142], - [140, 138, 136], - [134, 132, 130], - [128, 126, 124], - [122, 120, 118], - [116, 114, 112], - [110, 108, 106], - [104, 102, 100], - [98, 96, 94], - [92, 90, 88], - [86, 84, 82], - [80, 78, 76], - [74, 72, 70], - [68, 66, 64], - [62, 60, 58], - [56, 54, 52], - [50, 48, 46], - [44, 42, 40], - [38, 36, 34], - [32, 30, 28], - [26, 24, 22], - [20, 18, 16], - [14, 12, 10], - [8, 6, 4], - [2, 170, 170], - [168, 112, 56], - [166, 166, 166], - [164, 164, 164], - [162, 108, 54], - [160, 128, 96], - [64, 32, 160], - [158, 158, 158], - [156, 104, 52], - [154, 154, 154], - [152, 152, 152], - [150, 140, 130], - [120, 110, 100], - [90, 80, 70], - [60, 50, 40], - [30, 20, 10], - [148, 148, 148], - [146, 146, 146], - [144, 96, 48], - [142, 142, 142], - [140, 112, 84], - [56, 28, 140], - [138, 92, 46], - [136, 128, 120], - [112, 104, 96], - [88, 80, 72], - [64, 56, 48], - [40, 32, 24], - [16, 8, 136], - [134, 134, 134], - [132, 88, 44], - [130, 104, 78], - [52, 26, 130], - [128, 128, 128], - [127, 127, 127], - [126, 84, 42], - [125, 100, 75], - [50, 25, 125], - [124, 124, 124], - [123, 82, 41], - [122, 122, 122], - [121, 121, 121], - [120, 112, 104], - [96, 88, 80], - [72, 64, 56], - [48, 40, 32], - [24, 16, 8], - [119, 112, 105], - [98, 91, 84], - [77, 70, 63], - [56, 49, 42], - [35, 28, 21], - [14, 7, 119], - [118, 118, 118], - [117, 78, 39], - [116, 116, 116], - [115, 92, 69], - [46, 23, 115], - [114, 76, 38], - [113, 113, 113], - [112, 112, 112], - [111, 74, 37], - [110, 88, 66], - [44, 22, 110], - [109, 109, 109], - [108, 72, 36], - [107, 107, 107], - [106, 106, 106], - [105, 98, 91], - [84, 77, 70], - [63, 56, 49], - [42, 35, 28], - [21, 14, 7], - [104, 104, 104], - [103, 103, 103], - [102, 100, 98], - [96, 94, 92], - [90, 88, 86], - [84, 82, 80], - [78, 76, 74], - [72, 70, 68], - [66, 64, 62], - [60, 58, 56], - [54, 52, 50], - [48, 46, 44], - [42, 40, 38], - [36, 34, 32], - [30, 28, 26], - [24, 22, 20], - [18, 16, 14], - [12, 10, 8], - [6, 4, 2], - [101, 101, 101], - [100, 80, 60], - [40, 20, 100], - [99, 66, 33], - [98, 98, 98], - [97, 97, 97], - [96, 64, 32], - [95, 76, 57], - [38, 19, 95], - [94, 94, 94], - [93, 62, 31], - [92, 92, 92], - [91, 91, 91], - [90, 84, 78], - [72, 66, 60], - [54, 48, 42], - [36, 30, 24], - [18, 12, 6], - [89, 89, 89], - [88, 88, 88], - [87, 58, 29], - [86, 86, 86], - [85, 84, 83], - [82, 81, 80], - [79, 78, 77], - [76, 75, 74], - [73, 72, 71], - [70, 69, 68], - [67, 66, 65], - [64, 63, 62], - [61, 60, 59], - [58, 57, 56], - [55, 54, 53], - [52, 51, 50], - [49, 48, 47], - [46, 45, 44], - [43, 42, 41], - [40, 39, 38], - [37, 36, 35], - [34, 33, 32], - [31, 30, 29], - [28, 27, 26], - [25, 24, 23], - [22, 21, 20], - [19, 18, 17], - [16, 15, 14], - [13, 12, 11], - [10, 9, 8], - [7, 6, 5], - [4, 3, 2], - [1, 85, 85], - [84, 56, 28], - [83, 83, 83], - [82, 82, 82], - [81, 54, 27], - [80, 64, 48], - [32, 16, 80], - [79, 79, 79], - [78, 52, 26], - [77, 77, 77], - [76, 76, 76], - [75, 70, 65], - [60, 55, 50], - [45, 40, 35], - [30, 25, 20], - [15, 10, 5], - [74, 74, 74], - [73, 73, 73], - [72, 48, 24], - [71, 71, 71], - [70, 56, 42], - [28, 14, 70], - [69, 46, 23], - [68, 64, 60], - [56, 52, 48], - [44, 40, 36], - [32, 28, 24], - [20, 16, 12], - [8, 4, 68], - [67, 67, 67], - [66, 44, 22], - [65, 52, 39], - [26, 13, 65], - [64, 64, 64], - [63, 42, 21], - [62, 62, 62], - [61, 61, 61], - [60, 56, 52], - [48, 44, 40], - [36, 32, 28], - [24, 20, 16], - [12, 8, 4], - [59, 59, 59], - [58, 58, 58], - [57, 38, 19], - [56, 56, 56], - [55, 44, 33], - [22, 11, 55], - [54, 36, 18], - [53, 53, 53], - [52, 52, 52], - [51, 50, 49], - [48, 47, 46], - [45, 44, 43], - [42, 41, 40], - [39, 38, 37], - [36, 35, 34], - [33, 32, 31], - [30, 29, 28], - [27, 26, 25], - [24, 23, 22], - [21, 20, 19], - [18, 17, 16], - [15, 14, 13], - [12, 11, 10], - [9, 8, 7], - [6, 5, 4], - [3, 2, 1], - [50, 40, 30], - [20, 10, 50], - [49, 49, 49], - [48, 32, 16], - [47, 47, 47], - [46, 46, 46], - [45, 42, 39], - [36, 33, 30], - [27, 24, 21], - [18, 15, 12], - [9, 6, 3], - [44, 44, 44], - [43, 43, 43], - [42, 28, 14], - [41, 41, 41], - [40, 32, 24], - [16, 8, 40], - [39, 26, 13], - [38, 38, 38], - [37, 37, 37], - [36, 24, 12], - [35, 28, 21], - [14, 7, 35], - [34, 32, 30], - [28, 26, 24], - [22, 20, 18], - [16, 14, 12], - [10, 8, 6], - [4, 2, 34], - [33, 22, 11], - [32, 32, 32], - [31, 31, 31], - [30, 28, 26], - [24, 22, 20], - [18, 16, 14], - [12, 10, 8], - [6, 4, 2], - [29, 29, 29], - [28, 28, 28], - [27, 18, 9], - [26, 26, 26], - [25, 20, 15], - [10, 5, 25], - [24, 16, 8], - [23, 23, 23], - [22, 22, 22], - [21, 14, 7], - [20, 16, 12], - [8, 4, 20], - [19, 19, 19], - [18, 12, 6], - [17, 16, 15], - [14, 13, 12], - [11, 10, 9], - [8, 7, 6], - [5, 4, 3], - [2, 1, 17], - [16, 16, 16], - [15, 14, 13], - [12, 11, 10], - [9, 8, 7], - [6, 5, 4], - [3, 2, 1], - [14, 14, 14], - [13, 13, 13], - [12, 8, 4], - [11, 11, 11], - [10, 8, 6], - [4, 2, 10], - [9, 6, 3], - [8, 8, 8], - [7, 7, 7], - [6, 4, 2], - [5, 4, 3], - [2, 1, 5], - [4, 4, 4], - [3, 2, 1], - [2, 2, 2], - [1, 1, 1], - [150, 144, 138], - [132, 129, 126], - [123, 120, 117], - [114, 111, 108], - [105, 102, 99], - [96, 93, 90], - [87, 84, 81], - [78, 75, 72], - [69, 66, 63], - [60, 57, 54], - [51, 48, 45], - [42, 39, 36], - [33, 30, 27], - [24, 21, 18], - [15, 12, 9], - [6, 3, 153], - [176, 154, 143], - [132, 121, 110], - [99, 88, 77], - [66, 55, 44], - [33, 22, 11], - [196, 182, 168], - [154, 140, 126], - [112, 98, 84], - [70, 56, 42], - [28, 14, 210], - [182, 156, 143], - [130, 117, 104], - [91, 78, 65], - [52, 39, 26], - [13, 195, 195], - [154, 143, 132], - [121, 110, 99], - [88, 77, 66], - [55, 44, 33], - [22, 11, 165], - [126, 117, 108], - [99, 90, 81], - [72, 63, 54], - [45, 36, 27], - [18, 9, 135], - [188, 184, 180], - [176, 172, 168], - [164, 160, 156], - [152, 148, 144], - [140, 136, 132], - [128, 124, 120], - [116, 112, 108], - [104, 100, 96], - [92, 88, 84], - [80, 76, 72], - [68, 64, 60], - [56, 52, 48], - [44, 40, 36], - [32, 28, 24], - [20, 16, 12], - [8, 4, 204], - [196, 182, 168], - [154, 140, 126], - [112, 98, 84], - [70, 56, 42], - [28, 14, 238], - [182, 156, 143], - [130, 117, 104], - [91, 78, 65], - [52, 39, 26], - [13, 221, 221], - [188, 94, 47], - [184, 138, 92], - [46, 230, 230], - [180, 150, 120], - [105, 90, 75], - [60, 45, 30], - [15, 225, 225], - [176, 132, 88], - [44, 220, 220], - [172, 129, 86], - [43, 215, 215], - [164, 123, 82], - [41, 205, 205], - [160, 120, 80], - [40, 200, 200], - [148, 111, 74], - [37, 185, 185], - [140, 105, 70], - [35, 175, 175], - [124, 93, 62], - [31, 155, 155], - [116, 87, 58], - [29, 145, 145], - [190, 188, 186], - [184, 182, 180], - [178, 176, 174], - [172, 170, 168], - [166, 164, 162], - [160, 158, 156], - [154, 152, 150], - [148, 146, 144], - [142, 140, 138], - [136, 134, 132], - [130, 128, 127], - [126, 125, 124], - [123, 122, 121], - [120, 119, 118], - [117, 116, 115], - [114, 113, 112], - [111, 110, 109], - [108, 107, 106], - [105, 104, 103], - [102, 101, 100], - [99, 98, 97], - [96, 95, 94], - [93, 92, 91], - [90, 89, 88], - [87, 86, 85], - [84, 83, 82], - [81, 80, 79], - [78, 77, 76], - [75, 74, 73], - [72, 71, 70], - [69, 68, 67], - [66, 65, 64], - [63, 62, 61], - [60, 59, 58], - [57, 56, 55], - [54, 53, 52], - [51, 50, 49], - [48, 47, 46], - [45, 44, 43], - [42, 41, 40], - [39, 38, 37], - [36, 35, 34], - [33, 32, 31], - [30, 29, 28], - [27, 26, 25], - [24, 23, 22], - [21, 20, 19], - [18, 17, 16], - [15, 14, 13], - [12, 11, 10], - [9, 8, 7], - [6, 5, 4], - [3, 2, 1], - [176, 160, 144], - [128, 112, 96], - [80, 64, 48], - [32, 16, 240], - [168, 84, 252], - [166, 83, 249], - [164, 82, 246], - [162, 81, 243], - [158, 79, 237], - [156, 78, 234], - [154, 77, 231], - [152, 76, 228], - [148, 74, 222], - [146, 73, 219], - [144, 72, 216], - [142, 71, 213], - [138, 69, 207], - [134, 67, 201], - [132, 66, 198], - [128, 64, 192], - [126, 63, 189], - [122, 61, 183], - [118, 59, 177], - [114, 57, 171], - [106, 53, 159], - [98, 49, 147], - [94, 47, 141], - [86, 43, 129], - [150, 100, 50], - [98, 49, 245], - ]; - for (&cmyk_pixel, rgb_pixel) in cmyk_pixels.iter().zip(rgb_pixels) { - single_pix_correct(cmyk_pixel, rgb_pixel); - } - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_cmyk_to_rgb(b: &mut Bencher) { - let mut v = Vec::with_capacity((W * H * 4) as usize); - for c in 0..=255 { - for k in 0..=255 { - v.push(c as u8); - v.push(0); - v.push(0); - v.push(k as u8); - } - } - - b.iter(|| { - cmyk_to_rgb(&v); - }); - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_cmyk_to_rgb_single(b: &mut Bencher) { - b.iter(|| { - cmyk_to_rgb(&[128, 128, 128, 128]); - }); - } -} diff --git a/vendor/image/src/codecs/jpeg/encoder.rs b/vendor/image/src/codecs/jpeg/encoder.rs deleted file mode 100644 index edb2a05..0000000 --- a/vendor/image/src/codecs/jpeg/encoder.rs +++ /dev/null @@ -1,1074 +0,0 @@ -#![allow(clippy::too_many_arguments)] - -use std::borrow::Cow; -use std::convert::TryFrom; -use std::io::{self, Write}; - -use crate::error::{ - ImageError, ImageResult, ParameterError, ParameterErrorKind, UnsupportedError, - UnsupportedErrorKind, -}; -use crate::image::{ImageEncoder, ImageFormat}; -use crate::utils::clamp; -use crate::{ColorType, GenericImageView, ImageBuffer, Luma, LumaA, Pixel, Rgb, Rgba}; - -use super::entropy::build_huff_lut_const; -use super::transform; -use crate::traits::PixelWithColorType; - -// Markers -// Baseline DCT -static SOF0: u8 = 0xC0; -// Huffman Tables -static DHT: u8 = 0xC4; -// Start of Image (standalone) -static SOI: u8 = 0xD8; -// End of image (standalone) -static EOI: u8 = 0xD9; -// Start of Scan -static SOS: u8 = 0xDA; -// Quantization Tables -static DQT: u8 = 0xDB; -// Application segments start and end -static APP0: u8 = 0xE0; - -// section K.1 -// table K.1 -#[rustfmt::skip] -static STD_LUMA_QTABLE: [u8; 64] = [ - 16, 11, 10, 16, 24, 40, 51, 61, - 12, 12, 14, 19, 26, 58, 60, 55, - 14, 13, 16, 24, 40, 57, 69, 56, - 14, 17, 22, 29, 51, 87, 80, 62, - 18, 22, 37, 56, 68, 109, 103, 77, - 24, 35, 55, 64, 81, 104, 113, 92, - 49, 64, 78, 87, 103, 121, 120, 101, - 72, 92, 95, 98, 112, 100, 103, 99, -]; - -// table K.2 -#[rustfmt::skip] -static STD_CHROMA_QTABLE: [u8; 64] = [ - 17, 18, 24, 47, 99, 99, 99, 99, - 18, 21, 26, 66, 99, 99, 99, 99, - 24, 26, 56, 99, 99, 99, 99, 99, - 47, 66, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, -]; - -// section K.3 -// Code lengths and values for table K.3 -static STD_LUMA_DC_CODE_LENGTHS: [u8; 16] = [ - 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, -]; - -static STD_LUMA_DC_VALUES: [u8; 12] = [ - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, -]; - -static STD_LUMA_DC_HUFF_LUT: [(u8, u16); 256] = - build_huff_lut_const(&STD_LUMA_DC_CODE_LENGTHS, &STD_LUMA_DC_VALUES); - -// Code lengths and values for table K.4 -static STD_CHROMA_DC_CODE_LENGTHS: [u8; 16] = [ - 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, -]; - -static STD_CHROMA_DC_VALUES: [u8; 12] = [ - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, -]; - -static STD_CHROMA_DC_HUFF_LUT: [(u8, u16); 256] = - build_huff_lut_const(&STD_CHROMA_DC_CODE_LENGTHS, &STD_CHROMA_DC_VALUES); - -// Code lengths and values for table k.5 -static STD_LUMA_AC_CODE_LENGTHS: [u8; 16] = [ - 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, -]; - -static STD_LUMA_AC_VALUES: [u8; 162] = [ - 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, - 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, - 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, - 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, - 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, - 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, - 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, - 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, - 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, - 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, - 0xF9, 0xFA, -]; - -static STD_LUMA_AC_HUFF_LUT: [(u8, u16); 256] = - build_huff_lut_const(&STD_LUMA_AC_CODE_LENGTHS, &STD_LUMA_AC_VALUES); - -// Code lengths and values for table k.6 -static STD_CHROMA_AC_CODE_LENGTHS: [u8; 16] = [ - 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, -]; -static STD_CHROMA_AC_VALUES: [u8; 162] = [ - 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, - 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, - 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, - 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, - 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, - 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, - 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, - 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, - 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, - 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, - 0xF9, 0xFA, -]; - -static STD_CHROMA_AC_HUFF_LUT: [(u8, u16); 256] = - build_huff_lut_const(&STD_CHROMA_AC_CODE_LENGTHS, &STD_CHROMA_AC_VALUES); - -static DCCLASS: u8 = 0; -static ACCLASS: u8 = 1; - -static LUMADESTINATION: u8 = 0; -static CHROMADESTINATION: u8 = 1; - -static LUMAID: u8 = 1; -static CHROMABLUEID: u8 = 2; -static CHROMAREDID: u8 = 3; - -/// The permutation of dct coefficients. -#[rustfmt::skip] -static UNZIGZAG: [u8; 64] = [ - 0, 1, 8, 16, 9, 2, 3, 10, - 17, 24, 32, 25, 18, 11, 4, 5, - 12, 19, 26, 33, 40, 48, 41, 34, - 27, 20, 13, 6, 7, 14, 21, 28, - 35, 42, 49, 56, 57, 50, 43, 36, - 29, 22, 15, 23, 30, 37, 44, 51, - 58, 59, 52, 45, 38, 31, 39, 46, - 53, 60, 61, 54, 47, 55, 62, 63, -]; - -/// A representation of a JPEG component -#[derive(Copy, Clone)] -struct Component { - /// The Component's identifier - id: u8, - - /// Horizontal sampling factor - h: u8, - - /// Vertical sampling factor - v: u8, - - /// The quantization table selector - tq: u8, - - /// Index to the Huffman DC Table - dc_table: u8, - - /// Index to the AC Huffman Table - ac_table: u8, - - /// The dc prediction of the component - _dc_pred: i32, -} - -pub(crate) struct BitWriter<W> { - w: W, - accumulator: u32, - nbits: u8, -} - -impl<W: Write> BitWriter<W> { - fn new(w: W) -> Self { - BitWriter { - w, - accumulator: 0, - nbits: 0, - } - } - - fn write_bits(&mut self, bits: u16, size: u8) -> io::Result<()> { - if size == 0 { - return Ok(()); - } - - self.nbits += size; - self.accumulator |= u32::from(bits) << (32 - self.nbits) as usize; - - while self.nbits >= 8 { - let byte = self.accumulator >> 24; - self.w.write_all(&[byte as u8])?; - - if byte == 0xFF { - self.w.write_all(&[0x00])?; - } - - self.nbits -= 8; - self.accumulator <<= 8; - } - - Ok(()) - } - - fn pad_byte(&mut self) -> io::Result<()> { - self.write_bits(0x7F, 7) - } - - fn huffman_encode(&mut self, val: u8, table: &[(u8, u16); 256]) -> io::Result<()> { - let (size, code) = table[val as usize]; - - if size > 16 { - panic!("bad huffman value"); - } - - self.write_bits(code, size) - } - - fn write_block( - &mut self, - block: &[i32; 64], - prevdc: i32, - dctable: &[(u8, u16); 256], - actable: &[(u8, u16); 256], - ) -> io::Result<i32> { - // Differential DC encoding - let dcval = block[0]; - let diff = dcval - prevdc; - let (size, value) = encode_coefficient(diff); - - self.huffman_encode(size, dctable)?; - self.write_bits(value, size)?; - - // Figure F.2 - let mut zero_run = 0; - - for &k in &UNZIGZAG[1..] { - if block[k as usize] == 0 { - zero_run += 1; - } else { - while zero_run > 15 { - self.huffman_encode(0xF0, actable)?; - zero_run -= 16; - } - - let (size, value) = encode_coefficient(block[k as usize]); - let symbol = (zero_run << 4) | size; - - self.huffman_encode(symbol, actable)?; - self.write_bits(value, size)?; - - zero_run = 0; - } - } - - if block[UNZIGZAG[63] as usize] == 0 { - self.huffman_encode(0x00, actable)?; - } - - Ok(dcval) - } - - fn write_marker(&mut self, marker: u8) -> io::Result<()> { - self.w.write_all(&[0xFF, marker]) - } - - fn write_segment(&mut self, marker: u8, data: &[u8]) -> io::Result<()> { - self.w.write_all(&[0xFF, marker])?; - self.w.write_all(&(data.len() as u16 + 2).to_be_bytes())?; - self.w.write_all(data) - } -} - -/// Represents a unit in which the density of an image is measured -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub enum PixelDensityUnit { - /// Represents the absence of a unit, the values indicate only a - /// [pixel aspect ratio](https://en.wikipedia.org/wiki/Pixel_aspect_ratio) - PixelAspectRatio, - - /// Pixels per inch (2.54 cm) - Inches, - - /// Pixels per centimeter - Centimeters, -} - -/// Represents the pixel density of an image -/// -/// For example, a 300 DPI image is represented by: -/// -/// ```rust -/// use image::codecs::jpeg::*; -/// let hdpi = PixelDensity::dpi(300); -/// assert_eq!(hdpi, PixelDensity {density: (300,300), unit: PixelDensityUnit::Inches}) -/// ``` -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub struct PixelDensity { - /// A couple of values for (Xdensity, Ydensity) - pub density: (u16, u16), - /// The unit in which the density is measured - pub unit: PixelDensityUnit, -} - -impl PixelDensity { - /// Creates the most common pixel density type: - /// the horizontal and the vertical density are equal, - /// and measured in pixels per inch. - pub fn dpi(density: u16) -> Self { - PixelDensity { - density: (density, density), - unit: PixelDensityUnit::Inches, - } - } -} - -impl Default for PixelDensity { - /// Returns a pixel density with a pixel aspect ratio of 1 - fn default() -> Self { - PixelDensity { - density: (1, 1), - unit: PixelDensityUnit::PixelAspectRatio, - } - } -} - -/// The representation of a JPEG encoder -pub struct JpegEncoder<W> { - writer: BitWriter<W>, - - components: Vec<Component>, - tables: Vec<[u8; 64]>, - - luma_dctable: Cow<'static, [(u8, u16); 256]>, - luma_actable: Cow<'static, [(u8, u16); 256]>, - chroma_dctable: Cow<'static, [(u8, u16); 256]>, - chroma_actable: Cow<'static, [(u8, u16); 256]>, - - pixel_density: PixelDensity, -} - -impl<W: Write> JpegEncoder<W> { - /// Create a new encoder that writes its output to ```w``` - pub fn new(w: W) -> JpegEncoder<W> { - JpegEncoder::new_with_quality(w, 75) - } - - /// Create a new encoder that writes its output to ```w```, and has - /// the quality parameter ```quality``` with a value in the range 1-100 - /// where 1 is the worst and 100 is the best. - pub fn new_with_quality(w: W, quality: u8) -> JpegEncoder<W> { - let components = vec![ - Component { - id: LUMAID, - h: 1, - v: 1, - tq: LUMADESTINATION, - dc_table: LUMADESTINATION, - ac_table: LUMADESTINATION, - _dc_pred: 0, - }, - Component { - id: CHROMABLUEID, - h: 1, - v: 1, - tq: CHROMADESTINATION, - dc_table: CHROMADESTINATION, - ac_table: CHROMADESTINATION, - _dc_pred: 0, - }, - Component { - id: CHROMAREDID, - h: 1, - v: 1, - tq: CHROMADESTINATION, - dc_table: CHROMADESTINATION, - ac_table: CHROMADESTINATION, - _dc_pred: 0, - }, - ]; - - // Derive our quantization table scaling value using the libjpeg algorithm - let scale = u32::from(clamp(quality, 1, 100)); - let scale = if scale < 50 { - 5000 / scale - } else { - 200 - scale * 2 - }; - - let mut tables = vec![STD_LUMA_QTABLE, STD_CHROMA_QTABLE]; - tables.iter_mut().for_each(|t| { - t.iter_mut().for_each(|v| { - *v = clamp( - (u32::from(*v) * scale + 50) / 100, - 1, - u32::from(u8::max_value()), - ) as u8; - }) - }); - - JpegEncoder { - writer: BitWriter::new(w), - - components, - tables, - - luma_dctable: Cow::Borrowed(&STD_LUMA_DC_HUFF_LUT), - luma_actable: Cow::Borrowed(&STD_LUMA_AC_HUFF_LUT), - chroma_dctable: Cow::Borrowed(&STD_CHROMA_DC_HUFF_LUT), - chroma_actable: Cow::Borrowed(&STD_CHROMA_AC_HUFF_LUT), - - pixel_density: PixelDensity::default(), - } - } - - /// Set the pixel density of the images the encoder will encode. - /// If this method is not called, then a default pixel aspect ratio of 1x1 will be applied, - /// and no DPI information will be stored in the image. - pub fn set_pixel_density(&mut self, pixel_density: PixelDensity) { - self.pixel_density = pixel_density; - } - - /// Encodes the image stored in the raw byte buffer ```image``` - /// that has dimensions ```width``` and ```height``` - /// and ```ColorType``` ```c``` - /// - /// The Image in encoded with subsampling ratio 4:2:2 - pub fn encode( - &mut self, - image: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - match color_type { - ColorType::L8 => { - let image: ImageBuffer<Luma<_>, _> = - ImageBuffer::from_raw(width, height, image).unwrap(); - self.encode_image(&image) - } - ColorType::La8 => { - let image: ImageBuffer<LumaA<_>, _> = - ImageBuffer::from_raw(width, height, image).unwrap(); - self.encode_image(&image) - } - ColorType::Rgb8 => { - let image: ImageBuffer<Rgb<_>, _> = - ImageBuffer::from_raw(width, height, image).unwrap(); - self.encode_image(&image) - } - ColorType::Rgba8 => { - let image: ImageBuffer<Rgba<_>, _> = - ImageBuffer::from_raw(width, height, image).unwrap(); - self.encode_image(&image) - } - _ => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Jpeg.into(), - UnsupportedErrorKind::Color(color_type.into()), - ), - )), - } - } - - /// Encodes the given image. - /// - /// As a special feature this does not require the whole image to be present in memory at the - /// same time such that it may be computed on the fly, which is why this method exists on this - /// encoder but not on others. Instead the encoder will iterate over 8-by-8 blocks of pixels at - /// a time, inspecting each pixel exactly once. You can rely on this behaviour when calling - /// this method. - /// - /// The Image in encoded with subsampling ratio 4:2:2 - pub fn encode_image<I: GenericImageView>(&mut self, image: &I) -> ImageResult<()> - where - I::Pixel: PixelWithColorType, - { - let n = I::Pixel::CHANNEL_COUNT; - let color_type = I::Pixel::COLOR_TYPE; - let num_components = if n == 1 || n == 2 { 1 } else { 3 }; - - self.writer.write_marker(SOI)?; - - let mut buf = Vec::new(); - - build_jfif_header(&mut buf, self.pixel_density); - self.writer.write_segment(APP0, &buf)?; - - build_frame_header( - &mut buf, - 8, - // TODO: not idiomatic yet. Should be an EncodingError and mention jpg. Further it - // should check dimensions prior to writing. - u16::try_from(image.width()).map_err(|_| { - ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - )) - })?, - u16::try_from(image.height()).map_err(|_| { - ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - )) - })?, - &self.components[..num_components], - ); - self.writer.write_segment(SOF0, &buf)?; - - assert_eq!(self.tables.len(), 2); - let numtables = if num_components == 1 { 1 } else { 2 }; - - for (i, table) in self.tables[..numtables].iter().enumerate() { - build_quantization_segment(&mut buf, 8, i as u8, table); - self.writer.write_segment(DQT, &buf)?; - } - - build_huffman_segment( - &mut buf, - DCCLASS, - LUMADESTINATION, - &STD_LUMA_DC_CODE_LENGTHS, - &STD_LUMA_DC_VALUES, - ); - self.writer.write_segment(DHT, &buf)?; - - build_huffman_segment( - &mut buf, - ACCLASS, - LUMADESTINATION, - &STD_LUMA_AC_CODE_LENGTHS, - &STD_LUMA_AC_VALUES, - ); - self.writer.write_segment(DHT, &buf)?; - - if num_components == 3 { - build_huffman_segment( - &mut buf, - DCCLASS, - CHROMADESTINATION, - &STD_CHROMA_DC_CODE_LENGTHS, - &STD_CHROMA_DC_VALUES, - ); - self.writer.write_segment(DHT, &buf)?; - - build_huffman_segment( - &mut buf, - ACCLASS, - CHROMADESTINATION, - &STD_CHROMA_AC_CODE_LENGTHS, - &STD_CHROMA_AC_VALUES, - ); - self.writer.write_segment(DHT, &buf)?; - } - - build_scan_header(&mut buf, &self.components[..num_components]); - self.writer.write_segment(SOS, &buf)?; - - if color_type.has_color() { - self.encode_rgb(image) - } else { - self.encode_gray(image) - }?; - - self.writer.pad_byte()?; - self.writer.write_marker(EOI)?; - Ok(()) - } - - fn encode_gray<I: GenericImageView>(&mut self, image: &I) -> io::Result<()> { - let mut yblock = [0u8; 64]; - let mut y_dcprev = 0; - let mut dct_yblock = [0i32; 64]; - - for y in (0..image.height()).step_by(8) { - for x in (0..image.width()).step_by(8) { - copy_blocks_gray(image, x, y, &mut yblock); - - // Level shift and fdct - // Coeffs are scaled by 8 - transform::fdct(&yblock, &mut dct_yblock); - - // Quantization - for (i, dct) in dct_yblock.iter_mut().enumerate() { - *dct = ((*dct / 8) as f32 / f32::from(self.tables[0][i])).round() as i32; - } - - let la = &*self.luma_actable; - let ld = &*self.luma_dctable; - - y_dcprev = self.writer.write_block(&dct_yblock, y_dcprev, ld, la)?; - } - } - - Ok(()) - } - - fn encode_rgb<I: GenericImageView>(&mut self, image: &I) -> io::Result<()> { - let mut y_dcprev = 0; - let mut cb_dcprev = 0; - let mut cr_dcprev = 0; - - let mut dct_yblock = [0i32; 64]; - let mut dct_cb_block = [0i32; 64]; - let mut dct_cr_block = [0i32; 64]; - - let mut yblock = [0u8; 64]; - let mut cb_block = [0u8; 64]; - let mut cr_block = [0u8; 64]; - - for y in (0..image.height()).step_by(8) { - for x in (0..image.width()).step_by(8) { - // RGB -> YCbCr - copy_blocks_ycbcr(image, x, y, &mut yblock, &mut cb_block, &mut cr_block); - - // Level shift and fdct - // Coeffs are scaled by 8 - transform::fdct(&yblock, &mut dct_yblock); - transform::fdct(&cb_block, &mut dct_cb_block); - transform::fdct(&cr_block, &mut dct_cr_block); - - // Quantization - for i in 0usize..64 { - dct_yblock[i] = - ((dct_yblock[i] / 8) as f32 / f32::from(self.tables[0][i])).round() as i32; - dct_cb_block[i] = ((dct_cb_block[i] / 8) as f32 / f32::from(self.tables[1][i])) - .round() as i32; - dct_cr_block[i] = ((dct_cr_block[i] / 8) as f32 / f32::from(self.tables[1][i])) - .round() as i32; - } - - let la = &*self.luma_actable; - let ld = &*self.luma_dctable; - let cd = &*self.chroma_dctable; - let ca = &*self.chroma_actable; - - y_dcprev = self.writer.write_block(&dct_yblock, y_dcprev, ld, la)?; - cb_dcprev = self.writer.write_block(&dct_cb_block, cb_dcprev, cd, ca)?; - cr_dcprev = self.writer.write_block(&dct_cr_block, cr_dcprev, cd, ca)?; - } - } - - Ok(()) - } -} - -impl<W: Write> ImageEncoder for JpegEncoder<W> { - fn write_image( - mut self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - self.encode(buf, width, height, color_type) - } -} - -fn build_jfif_header(m: &mut Vec<u8>, density: PixelDensity) { - m.clear(); - m.extend_from_slice(b"JFIF"); - m.extend_from_slice(&[ - 0, - 0x01, - 0x02, - match density.unit { - PixelDensityUnit::PixelAspectRatio => 0x00, - PixelDensityUnit::Inches => 0x01, - PixelDensityUnit::Centimeters => 0x02, - }, - ]); - m.extend_from_slice(&density.density.0.to_be_bytes()); - m.extend_from_slice(&density.density.1.to_be_bytes()); - m.extend_from_slice(&[0, 0]); -} - -fn build_frame_header( - m: &mut Vec<u8>, - precision: u8, - width: u16, - height: u16, - components: &[Component], -) { - m.clear(); - - m.push(precision); - m.extend_from_slice(&height.to_be_bytes()); - m.extend_from_slice(&width.to_be_bytes()); - m.push(components.len() as u8); - - for &comp in components.iter() { - let hv = (comp.h << 4) | comp.v; - m.extend_from_slice(&[comp.id, hv, comp.tq]); - } -} - -fn build_scan_header(m: &mut Vec<u8>, components: &[Component]) { - m.clear(); - - m.push(components.len() as u8); - - for &comp in components.iter() { - let tables = (comp.dc_table << 4) | comp.ac_table; - m.extend_from_slice(&[comp.id, tables]); - } - - // spectral start and end, approx. high and low - m.extend_from_slice(&[0, 63, 0]); -} - -fn build_huffman_segment( - m: &mut Vec<u8>, - class: u8, - destination: u8, - numcodes: &[u8; 16], - values: &[u8], -) { - m.clear(); - - let tcth = (class << 4) | destination; - m.push(tcth); - - m.extend_from_slice(numcodes); - - let sum: usize = numcodes.iter().map(|&x| x as usize).sum(); - - assert_eq!(sum, values.len()); - - m.extend_from_slice(values); -} - -fn build_quantization_segment(m: &mut Vec<u8>, precision: u8, identifier: u8, qtable: &[u8; 64]) { - m.clear(); - - let p = if precision == 8 { 0 } else { 1 }; - - let pqtq = (p << 4) | identifier; - m.push(pqtq); - - for &i in &UNZIGZAG[..] { - m.push(qtable[i as usize]); - } -} - -fn encode_coefficient(coefficient: i32) -> (u8, u16) { - let mut magnitude = coefficient.unsigned_abs() as u16; - let mut num_bits = 0u8; - - while magnitude > 0 { - magnitude >>= 1; - num_bits += 1; - } - - let mask = (1 << num_bits as usize) - 1; - - let val = if coefficient < 0 { - (coefficient - 1) as u16 & mask - } else { - coefficient as u16 & mask - }; - - (num_bits, val) -} - -#[inline] -fn rgb_to_ycbcr<P: Pixel>(pixel: P) -> (u8, u8, u8) { - use crate::traits::Primitive; - use num_traits::cast::ToPrimitive; - - let [r, g, b] = pixel.to_rgb().0; - let max: f32 = P::Subpixel::DEFAULT_MAX_VALUE.to_f32().unwrap(); - let r: f32 = r.to_f32().unwrap(); - let g: f32 = g.to_f32().unwrap(); - let b: f32 = b.to_f32().unwrap(); - - // Coefficients from JPEG File Interchange Format (Version 1.02), multiplied for 255 maximum. - let y = 76.245 / max * r + 149.685 / max * g + 29.07 / max * b; - let cb = -43.0185 / max * r - 84.4815 / max * g + 127.5 / max * b + 128.; - let cr = 127.5 / max * r - 106.7685 / max * g - 20.7315 / max * b + 128.; - - (y as u8, cb as u8, cr as u8) -} - -/// Returns the pixel at (x,y) if (x,y) is in the image, -/// otherwise the closest pixel in the image -#[inline] -fn pixel_at_or_near<I: GenericImageView>(source: &I, x: u32, y: u32) -> I::Pixel { - if source.in_bounds(x, y) { - source.get_pixel(x, y) - } else { - source.get_pixel(x.min(source.width() - 1), y.min(source.height() - 1)) - } -} - -fn copy_blocks_ycbcr<I: GenericImageView>( - source: &I, - x0: u32, - y0: u32, - yb: &mut [u8; 64], - cbb: &mut [u8; 64], - crb: &mut [u8; 64], -) { - for y in 0..8 { - for x in 0..8 { - let pixel = pixel_at_or_near(source, x + x0, y + y0); - let (yc, cb, cr) = rgb_to_ycbcr(pixel); - - yb[(y * 8 + x) as usize] = yc; - cbb[(y * 8 + x) as usize] = cb; - crb[(y * 8 + x) as usize] = cr; - } - } -} - -fn copy_blocks_gray<I: GenericImageView>(source: &I, x0: u32, y0: u32, gb: &mut [u8; 64]) { - use num_traits::cast::ToPrimitive; - for y in 0..8 { - for x in 0..8 { - let pixel = pixel_at_or_near(source, x0 + x, y0 + y); - let [luma] = pixel.to_luma().0; - gb[(y * 8 + x) as usize] = luma.to_u8().unwrap(); - } - } -} - -#[cfg(test)] -mod tests { - use std::io::Cursor; - - #[cfg(feature = "benchmarks")] - extern crate test; - #[cfg(feature = "benchmarks")] - use test::Bencher; - - use crate::color::ColorType; - use crate::error::ParameterErrorKind::DimensionMismatch; - use crate::image::ImageDecoder; - use crate::{ImageEncoder, ImageError}; - - use super::super::JpegDecoder; - use super::{ - build_frame_header, build_huffman_segment, build_jfif_header, build_quantization_segment, - build_scan_header, Component, JpegEncoder, PixelDensity, DCCLASS, LUMADESTINATION, - STD_LUMA_DC_CODE_LENGTHS, STD_LUMA_DC_VALUES, - }; - - fn decode(encoded: &[u8]) -> Vec<u8> { - let decoder = JpegDecoder::new(Cursor::new(encoded)).expect("Could not decode image"); - - let mut decoded = vec![0; decoder.total_bytes() as usize]; - decoder - .read_image(&mut decoded) - .expect("Could not decode image"); - decoded - } - - #[test] - fn roundtrip_sanity_check() { - // create a 1x1 8-bit image buffer containing a single red pixel - let img = [255u8, 0, 0]; - - // encode it into a memory buffer - let mut encoded_img = Vec::new(); - { - let encoder = JpegEncoder::new_with_quality(&mut encoded_img, 100); - encoder - .write_image(&img, 1, 1, ColorType::Rgb8) - .expect("Could not encode image"); - } - - // decode it from the memory buffer - { - let decoded = decode(&encoded_img); - // note that, even with the encode quality set to 100, we do not get the same image - // back. Therefore, we're going to assert that it's at least red-ish: - assert_eq!(3, decoded.len()); - assert!(decoded[0] > 0x80); - assert!(decoded[1] < 0x80); - assert!(decoded[2] < 0x80); - } - } - - #[test] - fn grayscale_roundtrip_sanity_check() { - // create a 2x2 8-bit image buffer containing a white diagonal - let img = [255u8, 0, 0, 255]; - - // encode it into a memory buffer - let mut encoded_img = Vec::new(); - { - let encoder = JpegEncoder::new_with_quality(&mut encoded_img, 100); - encoder - .write_image(&img[..], 2, 2, ColorType::L8) - .expect("Could not encode image"); - } - - // decode it from the memory buffer - { - let decoded = decode(&encoded_img); - // note that, even with the encode quality set to 100, we do not get the same image - // back. Therefore, we're going to assert that the diagonal is at least white-ish: - assert_eq!(4, decoded.len()); - assert!(decoded[0] > 0x80); - assert!(decoded[1] < 0x80); - assert!(decoded[2] < 0x80); - assert!(decoded[3] > 0x80); - } - } - - #[test] - fn jfif_header_density_check() { - let mut buffer = Vec::new(); - build_jfif_header(&mut buffer, PixelDensity::dpi(300)); - assert_eq!( - buffer, - vec![ - b'J', - b'F', - b'I', - b'F', - 0, - 1, - 2, // JFIF version 1.2 - 1, // density is in dpi - 300u16.to_be_bytes()[0], - 300u16.to_be_bytes()[1], - 300u16.to_be_bytes()[0], - 300u16.to_be_bytes()[1], - 0, - 0, // No thumbnail - ] - ); - } - - #[test] - fn test_image_too_large() { - // JPEG cannot encode images larger than 65,535×65,535 - // create a 65,536×1 8-bit black image buffer - let img = [0; 65_536]; - // Try to encode an image that is too large - let mut encoded = Vec::new(); - let encoder = JpegEncoder::new_with_quality(&mut encoded, 100); - let result = encoder.write_image(&img, 65_536, 1, ColorType::L8); - match result { - Err(ImageError::Parameter(err)) => { - assert_eq!(err.kind(), DimensionMismatch) - } - other => { - assert!( - false, - "Encoding an image that is too large should return a DimensionError \ - it returned {:?} instead", - other - ) - } - } - } - - #[test] - fn test_build_jfif_header() { - let mut buf = vec![]; - let density = PixelDensity::dpi(100); - build_jfif_header(&mut buf, density); - assert_eq!( - buf, - [0x4A, 0x46, 0x49, 0x46, 0x00, 0x01, 0x02, 0x01, 0, 100, 0, 100, 0, 0] - ); - } - - #[test] - fn test_build_frame_header() { - let mut buf = vec![]; - let components = vec![ - Component { - id: 1, - h: 1, - v: 1, - tq: 5, - dc_table: 5, - ac_table: 5, - _dc_pred: 0, - }, - Component { - id: 2, - h: 1, - v: 1, - tq: 4, - dc_table: 4, - ac_table: 4, - _dc_pred: 0, - }, - ]; - build_frame_header(&mut buf, 5, 100, 150, &components); - assert_eq!( - buf, - [5, 0, 150, 0, 100, 2, 1, 1 << 4 | 1, 5, 2, 1 << 4 | 1, 4] - ); - } - - #[test] - fn test_build_scan_header() { - let mut buf = vec![]; - let components = vec![ - Component { - id: 1, - h: 1, - v: 1, - tq: 5, - dc_table: 5, - ac_table: 5, - _dc_pred: 0, - }, - Component { - id: 2, - h: 1, - v: 1, - tq: 4, - dc_table: 4, - ac_table: 4, - _dc_pred: 0, - }, - ]; - build_scan_header(&mut buf, &components); - assert_eq!(buf, [2, 1, 5 << 4 | 5, 2, 4 << 4 | 4, 0, 63, 0]); - } - - #[test] - fn test_build_huffman_segment() { - let mut buf = vec![]; - build_huffman_segment( - &mut buf, - DCCLASS, - LUMADESTINATION, - &STD_LUMA_DC_CODE_LENGTHS, - &STD_LUMA_DC_VALUES, - ); - assert_eq!( - buf, - vec![ - 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, - 10, 11 - ] - ); - } - - #[test] - fn test_build_quantization_segment() { - let mut buf = vec![]; - let qtable = [0u8; 64]; - build_quantization_segment(&mut buf, 8, 1, &qtable); - let mut expected = vec![]; - expected.push(0 << 4 | 1); - expected.extend_from_slice(&[0; 64]); - assert_eq!(buf, expected) - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_jpeg_encoder_new(b: &mut Bencher) { - b.iter(|| { - let mut y = vec![]; - let x = JpegEncoder::new(&mut y); - }) - } -} diff --git a/vendor/image/src/codecs/jpeg/entropy.rs b/vendor/image/src/codecs/jpeg/entropy.rs deleted file mode 100644 index 5bdcef6..0000000 --- a/vendor/image/src/codecs/jpeg/entropy.rs +++ /dev/null @@ -1,63 +0,0 @@ -/// Given an array containing the number of codes of each code length, -/// this function generates the huffman codes lengths and their respective -/// code lengths as specified by the JPEG spec. -const fn derive_codes_and_sizes(bits: &[u8; 16]) -> ([u8; 256], [u16; 256]) { - let mut huffsize = [0u8; 256]; - let mut huffcode = [0u16; 256]; - - let mut k = 0; - - // Annex C.2 - // Figure C.1 - // Generate table of individual code lengths - let mut i = 0; - while i < 16 { - let mut j = 0; - while j < bits[i as usize] { - huffsize[k] = i + 1; - k += 1; - j += 1; - } - i += 1; - } - - huffsize[k] = 0; - - // Annex C.2 - // Figure C.2 - // Generate table of huffman codes - k = 0; - let mut code = 0u16; - let mut size = huffsize[0]; - - while huffsize[k] != 0 { - huffcode[k] = code; - code += 1; - k += 1; - - if huffsize[k] == size { - continue; - } - - // FIXME there is something wrong with this code - let diff = huffsize[k].wrapping_sub(size); - code = if diff < 16 { code << diff as usize } else { 0 }; - - size = size.wrapping_add(diff); - } - - (huffsize, huffcode) -} - -pub(crate) const fn build_huff_lut_const(bits: &[u8; 16], huffval: &[u8]) -> [(u8, u16); 256] { - let mut lut = [(17u8, 0u16); 256]; - let (huffsize, huffcode) = derive_codes_and_sizes(bits); - - let mut i = 0; - while i < huffval.len() { - lut[huffval[i] as usize] = (huffsize[i], huffcode[i]); - i += 1; - } - - lut -} diff --git a/vendor/image/src/codecs/jpeg/mod.rs b/vendor/image/src/codecs/jpeg/mod.rs deleted file mode 100644 index 4242733..0000000 --- a/vendor/image/src/codecs/jpeg/mod.rs +++ /dev/null @@ -1,16 +0,0 @@ -//! Decoding and Encoding of JPEG Images -//! -//! JPEG (Joint Photographic Experts Group) is an image format that supports lossy compression. -//! This module implements the Baseline JPEG standard. -//! -//! # Related Links -//! * <http://www.w3.org/Graphics/JPEG/itu-t81.pdf> - The JPEG specification -//! - -pub use self::decoder::JpegDecoder; -pub use self::encoder::{JpegEncoder, PixelDensity, PixelDensityUnit}; - -mod decoder; -mod encoder; -mod entropy; -mod transform; diff --git a/vendor/image/src/codecs/jpeg/transform.rs b/vendor/image/src/codecs/jpeg/transform.rs deleted file mode 100644 index 1ca01a9..0000000 --- a/vendor/image/src/codecs/jpeg/transform.rs +++ /dev/null @@ -1,196 +0,0 @@ -/* -fdct is a Rust translation of jfdctint.c from the -Independent JPEG Group's libjpeg version 9a -obtained from http://www.ijg.org/files/jpegsr9a.zip -It comes with the following conditions of distribution and use: - - In plain English: - - 1. We don't promise that this software works. (But if you find any bugs, - please let us know!) - 2. You can use this software for whatever you want. You don't have to pay us. - 3. You may not pretend that you wrote this software. If you use it in a - program, you must acknowledge somewhere in your documentation that - you've used the IJG code. - - In legalese: - - The authors make NO WARRANTY or representation, either express or implied, - with respect to this software, its quality, accuracy, merchantability, or - fitness for a particular purpose. This software is provided "AS IS", and you, - its user, assume the entire risk as to its quality and accuracy. - - This software is copyright (C) 1991-2014, Thomas G. Lane, Guido Vollbeding. - All Rights Reserved except as specified below. - - Permission is hereby granted to use, copy, modify, and distribute this - software (or portions thereof) for any purpose, without fee, subject to these - conditions: - (1) If any part of the source code for this software is distributed, then this - README file must be included, with this copyright and no-warranty notice - unaltered; and any additions, deletions, or changes to the original files - must be clearly indicated in accompanying documentation. - (2) If only executable code is distributed, then the accompanying - documentation must state that "this software is based in part on the work of - the Independent JPEG Group". - (3) Permission for use of this software is granted only if the user accepts - full responsibility for any undesirable consequences; the authors accept - NO LIABILITY for damages of any kind. - - These conditions apply to any software derived from or based on the IJG code, - not just to the unmodified library. If you use our work, you ought to - acknowledge us. - - Permission is NOT granted for the use of any IJG author's name or company name - in advertising or publicity relating to this software or products derived from - it. This software may be referred to only as "the Independent JPEG Group's - software". - - We specifically permit and encourage the use of this software as the basis of - commercial products, provided that all warranty or liability claims are - assumed by the product vendor. -*/ - -static CONST_BITS: i32 = 13; -static PASS1_BITS: i32 = 2; - -static FIX_0_298631336: i32 = 2446; -static FIX_0_390180644: i32 = 3196; -static FIX_0_541196100: i32 = 4433; -static FIX_0_765366865: i32 = 6270; -static FIX_0_899976223: i32 = 7373; -static FIX_1_175875602: i32 = 9633; -static FIX_1_501321110: i32 = 12_299; -static FIX_1_847759065: i32 = 15_137; -static FIX_1_961570560: i32 = 16_069; -static FIX_2_053119869: i32 = 16_819; -static FIX_2_562915447: i32 = 20_995; -static FIX_3_072711026: i32 = 25_172; - -pub(crate) fn fdct(samples: &[u8; 64], coeffs: &mut [i32; 64]) { - // Pass 1: process rows. - // Results are scaled by sqrt(8) compared to a true DCT - // furthermore we scale the results by 2**PASS1_BITS - for y in 0usize..8 { - let y0 = y * 8; - - // Even part - let t0 = i32::from(samples[y0]) + i32::from(samples[y0 + 7]); - let t1 = i32::from(samples[y0 + 1]) + i32::from(samples[y0 + 6]); - let t2 = i32::from(samples[y0 + 2]) + i32::from(samples[y0 + 5]); - let t3 = i32::from(samples[y0 + 3]) + i32::from(samples[y0 + 4]); - - let t10 = t0 + t3; - let t12 = t0 - t3; - let t11 = t1 + t2; - let t13 = t1 - t2; - - let t0 = i32::from(samples[y0]) - i32::from(samples[y0 + 7]); - let t1 = i32::from(samples[y0 + 1]) - i32::from(samples[y0 + 6]); - let t2 = i32::from(samples[y0 + 2]) - i32::from(samples[y0 + 5]); - let t3 = i32::from(samples[y0 + 3]) - i32::from(samples[y0 + 4]); - - // Apply unsigned -> signed conversion - coeffs[y0] = (t10 + t11 - 8 * 128) << PASS1_BITS as usize; - coeffs[y0 + 4] = (t10 - t11) << PASS1_BITS as usize; - - let mut z1 = (t12 + t13) * FIX_0_541196100; - // Add fudge factor here for final descale - z1 += 1 << (CONST_BITS - PASS1_BITS - 1) as usize; - - coeffs[y0 + 2] = (z1 + t12 * FIX_0_765366865) >> (CONST_BITS - PASS1_BITS) as usize; - coeffs[y0 + 6] = (z1 - t13 * FIX_1_847759065) >> (CONST_BITS - PASS1_BITS) as usize; - - // Odd part - let t12 = t0 + t2; - let t13 = t1 + t3; - - let mut z1 = (t12 + t13) * FIX_1_175875602; - // Add fudge factor here for final descale - z1 += 1 << (CONST_BITS - PASS1_BITS - 1) as usize; - - let mut t12 = t12 * (-FIX_0_390180644); - let mut t13 = t13 * (-FIX_1_961570560); - t12 += z1; - t13 += z1; - - let z1 = (t0 + t3) * (-FIX_0_899976223); - let mut t0 = t0 * FIX_1_501321110; - let mut t3 = t3 * FIX_0_298631336; - t0 += z1 + t12; - t3 += z1 + t13; - - let z1 = (t1 + t2) * (-FIX_2_562915447); - let mut t1 = t1 * FIX_3_072711026; - let mut t2 = t2 * FIX_2_053119869; - t1 += z1 + t13; - t2 += z1 + t12; - - coeffs[y0 + 1] = t0 >> (CONST_BITS - PASS1_BITS) as usize; - coeffs[y0 + 3] = t1 >> (CONST_BITS - PASS1_BITS) as usize; - coeffs[y0 + 5] = t2 >> (CONST_BITS - PASS1_BITS) as usize; - coeffs[y0 + 7] = t3 >> (CONST_BITS - PASS1_BITS) as usize; - } - - // Pass 2: process columns - // We remove the PASS1_BITS scaling but leave the results scaled up an - // overall factor of 8 - for x in (0usize..8).rev() { - // Even part - let t0 = coeffs[x] + coeffs[x + 8 * 7]; - let t1 = coeffs[x + 8] + coeffs[x + 8 * 6]; - let t2 = coeffs[x + 8 * 2] + coeffs[x + 8 * 5]; - let t3 = coeffs[x + 8 * 3] + coeffs[x + 8 * 4]; - - // Add fudge factor here for final descale - let t10 = t0 + t3 + (1 << (PASS1_BITS - 1) as usize); - let t12 = t0 - t3; - let t11 = t1 + t2; - let t13 = t1 - t2; - - let t0 = coeffs[x] - coeffs[x + 8 * 7]; - let t1 = coeffs[x + 8] - coeffs[x + 8 * 6]; - let t2 = coeffs[x + 8 * 2] - coeffs[x + 8 * 5]; - let t3 = coeffs[x + 8 * 3] - coeffs[x + 8 * 4]; - - coeffs[x] = (t10 + t11) >> PASS1_BITS as usize; - coeffs[x + 8 * 4] = (t10 - t11) >> PASS1_BITS as usize; - - let mut z1 = (t12 + t13) * FIX_0_541196100; - // Add fudge factor here for final descale - z1 += 1 << (CONST_BITS + PASS1_BITS - 1) as usize; - - coeffs[x + 8 * 2] = (z1 + t12 * FIX_0_765366865) >> (CONST_BITS + PASS1_BITS) as usize; - coeffs[x + 8 * 6] = (z1 - t13 * FIX_1_847759065) >> (CONST_BITS + PASS1_BITS) as usize; - - // Odd part - let t12 = t0 + t2; - let t13 = t1 + t3; - - let mut z1 = (t12 + t13) * FIX_1_175875602; - // Add fudge factor here for final descale - z1 += 1 << (CONST_BITS - PASS1_BITS - 1) as usize; - - let mut t12 = t12 * (-FIX_0_390180644); - let mut t13 = t13 * (-FIX_1_961570560); - t12 += z1; - t13 += z1; - - let z1 = (t0 + t3) * (-FIX_0_899976223); - let mut t0 = t0 * FIX_1_501321110; - let mut t3 = t3 * FIX_0_298631336; - t0 += z1 + t12; - t3 += z1 + t13; - - let z1 = (t1 + t2) * (-FIX_2_562915447); - let mut t1 = t1 * FIX_3_072711026; - let mut t2 = t2 * FIX_2_053119869; - t1 += z1 + t13; - t2 += z1 + t12; - - coeffs[x + 8] = t0 >> (CONST_BITS + PASS1_BITS) as usize; - coeffs[x + 8 * 3] = t1 >> (CONST_BITS + PASS1_BITS) as usize; - coeffs[x + 8 * 5] = t2 >> (CONST_BITS + PASS1_BITS) as usize; - coeffs[x + 8 * 7] = t3 >> (CONST_BITS + PASS1_BITS) as usize; - } -} diff --git a/vendor/image/src/codecs/openexr.rs b/vendor/image/src/codecs/openexr.rs deleted file mode 100644 index 52d6ba9..0000000 --- a/vendor/image/src/codecs/openexr.rs +++ /dev/null @@ -1,592 +0,0 @@ -//! Decoding of OpenEXR (.exr) Images -//! -//! OpenEXR is an image format that is widely used, especially in VFX, -//! because it supports lossless and lossy compression for float data. -//! -//! This decoder only supports RGB and RGBA images. -//! If an image does not contain alpha information, -//! it is defaulted to `1.0` (no transparency). -//! -//! # Related Links -//! * <https://www.openexr.com/documentation.html> - The OpenEXR reference. -//! -//! -//! Current limitations (July 2021): -//! - only pixel type `Rgba32F` and `Rgba16F` are supported -//! - only non-deep rgb/rgba files supported, no conversion from/to YCbCr or similar -//! - only the first non-deep rgb layer is used -//! - only the largest mip map level is used -//! - pixels outside display window are lost -//! - meta data is lost -//! - dwaa/dwab compressed images not supported yet by the exr library -//! - (chroma) subsampling not supported yet by the exr library -use exr::prelude::*; - -use crate::error::{DecodingError, EncodingError, ImageFormatHint}; -use crate::image::decoder_to_vec; -use crate::{ - ColorType, ExtendedColorType, ImageDecoder, ImageEncoder, ImageError, ImageFormat, ImageResult, - Progress, -}; -use std::convert::TryInto; -use std::io::{Cursor, Read, Seek, Write}; - -/// An OpenEXR decoder. Immediately reads the meta data from the file. -#[derive(Debug)] -pub struct OpenExrDecoder<R> { - exr_reader: exr::block::reader::Reader<R>, - - // select a header that is rgb and not deep - header_index: usize, - - // decode either rgb or rgba. - // can be specified to include or discard alpha channels. - // if none, the alpha channel will only be allocated where the file contains data for it. - alpha_preference: Option<bool>, - - alpha_present_in_file: bool, -} - -impl<R: Read + Seek> OpenExrDecoder<R> { - /// Create a decoder. Consumes the first few bytes of the source to extract image dimensions. - /// Assumes the reader is buffered. In most cases, - /// you should wrap your reader in a `BufReader` for best performance. - /// Loads an alpha channel if the file has alpha samples. - /// Use `with_alpha_preference` if you want to load or not load alpha unconditionally. - pub fn new(source: R) -> ImageResult<Self> { - Self::with_alpha_preference(source, None) - } - - /// Create a decoder. Consumes the first few bytes of the source to extract image dimensions. - /// Assumes the reader is buffered. In most cases, - /// you should wrap your reader in a `BufReader` for best performance. - /// If alpha preference is specified, an alpha channel will - /// always be present or always be not present in the returned image. - /// If alpha preference is none, the alpha channel will only be returned if it is found in the file. - pub fn with_alpha_preference(source: R, alpha_preference: Option<bool>) -> ImageResult<Self> { - // read meta data, then wait for further instructions, keeping the file open and ready - let exr_reader = exr::block::read(source, false).map_err(to_image_err)?; - - let header_index = exr_reader - .headers() - .iter() - .position(|header| { - // check if r/g/b exists in the channels - let has_rgb = ["R", "G", "B"] - .iter() - .all(|&required| // alpha will be optional - header.channels.find_index_of_channel(&Text::from(required)).is_some()); - - // we currently dont support deep images, or images with other color spaces than rgb - !header.deep && has_rgb - }) - .ok_or_else(|| { - ImageError::Decoding(DecodingError::new( - ImageFormatHint::Exact(ImageFormat::OpenExr), - "image does not contain non-deep rgb channels", - )) - })?; - - let has_alpha = exr_reader.headers()[header_index] - .channels - .find_index_of_channel(&Text::from("A")) - .is_some(); - - Ok(Self { - alpha_preference, - exr_reader, - header_index, - alpha_present_in_file: has_alpha, - }) - } - - // does not leak exrs-specific meta data into public api, just does it for this module - fn selected_exr_header(&self) -> &exr::meta::header::Header { - &self.exr_reader.meta_data().headers[self.header_index] - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoder<'a> for OpenExrDecoder<R> { - type Reader = Cursor<Vec<u8>>; - - fn dimensions(&self) -> (u32, u32) { - let size = self - .selected_exr_header() - .shared_attributes - .display_window - .size; - (size.width() as u32, size.height() as u32) - } - - fn color_type(&self) -> ColorType { - let returns_alpha = self.alpha_preference.unwrap_or(self.alpha_present_in_file); - if returns_alpha { - ColorType::Rgba32F - } else { - ColorType::Rgb32F - } - } - - fn original_color_type(&self) -> ExtendedColorType { - if self.alpha_present_in_file { - ExtendedColorType::Rgba32F - } else { - ExtendedColorType::Rgb32F - } - } - - /// Use `read_image` instead if possible, - /// as this method creates a whole new buffer just to contain the entire image. - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(Cursor::new(decoder_to_vec(self)?)) - } - - fn scanline_bytes(&self) -> u64 { - // we cannot always read individual scan lines for every file, - // as the tiles or lines in the file could be in random or reversed order. - // therefore we currently read all lines at once - // Todo: optimize for specific exr.line_order? - self.total_bytes() - } - - // reads with or without alpha, depending on `self.alpha_preference` and `self.alpha_present_in_file` - fn read_image_with_progress<F: Fn(Progress)>( - self, - unaligned_bytes: &mut [u8], - progress_callback: F, - ) -> ImageResult<()> { - let blocks_in_header = self.selected_exr_header().chunk_count as u64; - let channel_count = self.color_type().channel_count() as usize; - - let display_window = self.selected_exr_header().shared_attributes.display_window; - let data_window_offset = - self.selected_exr_header().own_attributes.layer_position - display_window.position; - - { - // check whether the buffer is large enough for the dimensions of the file - let (width, height) = self.dimensions(); - let bytes_per_pixel = self.color_type().bytes_per_pixel() as usize; - let expected_byte_count = (width as usize) - .checked_mul(height as usize) - .and_then(|size| size.checked_mul(bytes_per_pixel)); - - // if the width and height does not match the length of the bytes, the arguments are invalid - let has_invalid_size_or_overflowed = expected_byte_count - .map(|expected_byte_count| unaligned_bytes.len() != expected_byte_count) - // otherwise, size calculation overflowed, is bigger than memory, - // therefore data is too small, so it is invalid. - .unwrap_or(true); - - if has_invalid_size_or_overflowed { - panic!("byte buffer not large enough for the specified dimensions and f32 pixels"); - } - } - - let result = read() - .no_deep_data() - .largest_resolution_level() - .rgba_channels( - move |_size, _channels| vec![0_f32; display_window.size.area() * channel_count], - move |buffer, index_in_data_window, (r, g, b, a_or_1): (f32, f32, f32, f32)| { - let index_in_display_window = - index_in_data_window.to_i32() + data_window_offset; - - // only keep pixels inside the data window - // TODO filter chunks based on this - if index_in_display_window.x() >= 0 - && index_in_display_window.y() >= 0 - && index_in_display_window.x() < display_window.size.width() as i32 - && index_in_display_window.y() < display_window.size.height() as i32 - { - let index_in_display_window = - index_in_display_window.to_usize("index bug").unwrap(); - let first_f32_index = - index_in_display_window.flat_index_for_size(display_window.size); - - buffer[first_f32_index * channel_count - ..(first_f32_index + 1) * channel_count] - .copy_from_slice(&[r, g, b, a_or_1][0..channel_count]); - - // TODO white point chromaticities + srgb/linear conversion? - } - }, - ) - .first_valid_layer() // TODO select exact layer by self.header_index? - .all_attributes() - .on_progress(|progress| { - progress_callback( - Progress::new( - (progress * blocks_in_header as f64) as u64, - blocks_in_header, - ), // TODO precision errors? - ); - }) - .from_chunks(self.exr_reader) - .map_err(to_image_err)?; - - // TODO this copy is strictly not necessary, but the exr api is a little too simple for reading into a borrowed target slice - - // this cast is safe and works with any alignment, as bytes are copied, and not f32 values. - // note: buffer slice length is checked in the beginning of this function and will be correct at this point - unaligned_bytes.copy_from_slice(bytemuck::cast_slice( - result.layer_data.channel_data.pixels.as_slice(), - )); - Ok(()) - } -} - -/// Write a raw byte buffer of pixels, -/// returning an Error if it has an invalid length. -/// -/// Assumes the writer is buffered. In most cases, -/// you should wrap your writer in a `BufWriter` for best performance. -// private. access via `OpenExrEncoder` -fn write_buffer( - mut buffered_write: impl Write + Seek, - unaligned_bytes: &[u8], - width: u32, - height: u32, - color_type: ColorType, -) -> ImageResult<()> { - let width = width as usize; - let height = height as usize; - - { - // check whether the buffer is large enough for the specified dimensions - let expected_byte_count = width - .checked_mul(height) - .and_then(|size| size.checked_mul(color_type.bytes_per_pixel() as usize)); - - // if the width and height does not match the length of the bytes, the arguments are invalid - let has_invalid_size_or_overflowed = expected_byte_count - .map(|expected_byte_count| unaligned_bytes.len() < expected_byte_count) - // otherwise, size calculation overflowed, is bigger than memory, - // therefore data is too small, so it is invalid. - .unwrap_or(true); - - if has_invalid_size_or_overflowed { - return Err(ImageError::Encoding(EncodingError::new( - ImageFormatHint::Exact(ImageFormat::OpenExr), - "byte buffer not large enough for the specified dimensions and f32 pixels", - ))); - } - } - - // bytes might be unaligned so we cannot cast the whole thing, instead lookup each f32 individually - let lookup_f32 = move |f32_index: usize| { - let unaligned_f32_bytes_slice = &unaligned_bytes[f32_index * 4..(f32_index + 1) * 4]; - let f32_bytes_array = unaligned_f32_bytes_slice - .try_into() - .expect("indexing error"); - f32::from_ne_bytes(f32_bytes_array) - }; - - match color_type { - ColorType::Rgb32F => { - exr::prelude::Image // TODO compression method zip?? - ::from_channels( - (width, height), - SpecificChannels::rgb(|pixel: Vec2<usize>| { - let pixel_index = 3 * pixel.flat_index_for_size(Vec2(width, height)); - ( - lookup_f32(pixel_index), - lookup_f32(pixel_index + 1), - lookup_f32(pixel_index + 2), - ) - }), - ) - .write() - // .on_progress(|progress| todo!()) - .to_buffered(&mut buffered_write) - .map_err(to_image_err)?; - } - - ColorType::Rgba32F => { - exr::prelude::Image // TODO compression method zip?? - ::from_channels( - (width, height), - SpecificChannels::rgba(|pixel: Vec2<usize>| { - let pixel_index = 4 * pixel.flat_index_for_size(Vec2(width, height)); - ( - lookup_f32(pixel_index), - lookup_f32(pixel_index + 1), - lookup_f32(pixel_index + 2), - lookup_f32(pixel_index + 3), - ) - }), - ) - .write() - // .on_progress(|progress| todo!()) - .to_buffered(&mut buffered_write) - .map_err(to_image_err)?; - } - - // TODO other color types and channel types - unsupported_color_type => { - return Err(ImageError::Encoding(EncodingError::new( - ImageFormatHint::Exact(ImageFormat::OpenExr), - format!( - "writing color type {:?} not yet supported", - unsupported_color_type - ), - ))) - } - } - - Ok(()) -} - -// TODO is this struct and trait actually used anywhere? -/// A thin wrapper that implements `ImageEncoder` for OpenEXR images. Will behave like `image::codecs::openexr::write_buffer`. -#[derive(Debug)] -pub struct OpenExrEncoder<W>(W); - -impl<W> OpenExrEncoder<W> { - /// Create an `ImageEncoder`. Does not write anything yet. Writing later will behave like `image::codecs::openexr::write_buffer`. - // use constructor, not public field, for future backwards-compatibility - pub fn new(write: W) -> Self { - Self(write) - } -} - -impl<W> ImageEncoder for OpenExrEncoder<W> -where - W: Write + Seek, -{ - /// Writes the complete image. - /// - /// Returns an Error if it has an invalid length. - /// Assumes the writer is buffered. In most cases, - /// you should wrap your writer in a `BufWriter` for best performance. - fn write_image( - self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - write_buffer(self.0, buf, width, height, color_type) - } -} - -fn to_image_err(exr_error: Error) -> ImageError { - ImageError::Decoding(DecodingError::new( - ImageFormatHint::Exact(ImageFormat::OpenExr), - exr_error.to_string(), - )) -} - -#[cfg(test)] -mod test { - use super::*; - - use std::io::BufReader; - use std::path::{Path, PathBuf}; - - use crate::buffer_::{Rgb32FImage, Rgba32FImage}; - use crate::error::{LimitError, LimitErrorKind}; - use crate::{ImageBuffer, Rgb, Rgba}; - - const BASE_PATH: &[&str] = &[".", "tests", "images", "exr"]; - - /// Write an `Rgb32FImage`. - /// Assumes the writer is buffered. In most cases, - /// you should wrap your writer in a `BufWriter` for best performance. - fn write_rgb_image(write: impl Write + Seek, image: &Rgb32FImage) -> ImageResult<()> { - write_buffer( - write, - bytemuck::cast_slice(image.as_raw().as_slice()), - image.width(), - image.height(), - ColorType::Rgb32F, - ) - } - - /// Write an `Rgba32FImage`. - /// Assumes the writer is buffered. In most cases, - /// you should wrap your writer in a `BufWriter` for best performance. - fn write_rgba_image(write: impl Write + Seek, image: &Rgba32FImage) -> ImageResult<()> { - write_buffer( - write, - bytemuck::cast_slice(image.as_raw().as_slice()), - image.width(), - image.height(), - ColorType::Rgba32F, - ) - } - - /// Read the file from the specified path into an `Rgba32FImage`. - fn read_as_rgba_image_from_file(path: impl AsRef<Path>) -> ImageResult<Rgba32FImage> { - read_as_rgba_image(BufReader::new(std::fs::File::open(path)?)) - } - - /// Read the file from the specified path into an `Rgb32FImage`. - fn read_as_rgb_image_from_file(path: impl AsRef<Path>) -> ImageResult<Rgb32FImage> { - read_as_rgb_image(BufReader::new(std::fs::File::open(path)?)) - } - - /// Read the file from the specified path into an `Rgb32FImage`. - fn read_as_rgb_image(read: impl Read + Seek) -> ImageResult<Rgb32FImage> { - let decoder = OpenExrDecoder::with_alpha_preference(read, Some(false))?; - let (width, height) = decoder.dimensions(); - let buffer: Vec<f32> = decoder_to_vec(decoder)?; - - ImageBuffer::from_raw(width, height, buffer) - // this should be the only reason for the "from raw" call to fail, - // even though such a large allocation would probably cause an error much earlier - .ok_or_else(|| { - ImageError::Limits(LimitError::from_kind(LimitErrorKind::InsufficientMemory)) - }) - } - - /// Read the file from the specified path into an `Rgba32FImage`. - fn read_as_rgba_image(read: impl Read + Seek) -> ImageResult<Rgba32FImage> { - let decoder = OpenExrDecoder::with_alpha_preference(read, Some(true))?; - let (width, height) = decoder.dimensions(); - let buffer: Vec<f32> = decoder_to_vec(decoder)?; - - ImageBuffer::from_raw(width, height, buffer) - // this should be the only reason for the "from raw" call to fail, - // even though such a large allocation would probably cause an error much earlier - .ok_or_else(|| { - ImageError::Limits(LimitError::from_kind(LimitErrorKind::InsufficientMemory)) - }) - } - - #[test] - fn compare_exr_hdr() { - if cfg!(not(feature = "hdr")) { - eprintln!("warning: to run all the openexr tests, activate the hdr feature flag"); - } - - #[cfg(feature = "hdr")] - { - let folder = BASE_PATH.iter().collect::<PathBuf>(); - let reference_path = folder.clone().join("overexposed gradient.hdr"); - let exr_path = folder - .clone() - .join("overexposed gradient - data window equals display window.exr"); - - let hdr: Vec<Rgb<f32>> = crate::codecs::hdr::HdrDecoder::new(std::io::BufReader::new( - std::fs::File::open(&reference_path).unwrap(), - )) - .unwrap() - .read_image_hdr() - .unwrap(); - - let exr_pixels: Rgb32FImage = read_as_rgb_image_from_file(exr_path).unwrap(); - assert_eq!( - exr_pixels.dimensions().0 * exr_pixels.dimensions().1, - hdr.len() as u32 - ); - - for (expected, found) in hdr.iter().zip(exr_pixels.pixels()) { - for (expected, found) in expected.0.iter().zip(found.0.iter()) { - // the large tolerance seems to be caused by - // the RGBE u8x4 pixel quantization of the hdr image format - assert!( - (expected - found).abs() < 0.1, - "expected {}, found {}", - expected, - found - ); - } - } - } - } - - #[test] - fn roundtrip_rgba() { - let mut next_random = vec![1.0, 0.0, -1.0, -3.14, 27.0, 11.0, 31.0] - .into_iter() - .cycle(); - let mut next_random = move || next_random.next().unwrap(); - - let generated_image: Rgba32FImage = ImageBuffer::from_fn(9, 31, |_x, _y| { - Rgba([next_random(), next_random(), next_random(), next_random()]) - }); - - let mut bytes = vec![]; - write_rgba_image(Cursor::new(&mut bytes), &generated_image).unwrap(); - let decoded_image = read_as_rgba_image(Cursor::new(bytes)).unwrap(); - - debug_assert_eq!(generated_image, decoded_image); - } - - #[test] - fn roundtrip_rgb() { - let mut next_random = vec![1.0, 0.0, -1.0, -3.14, 27.0, 11.0, 31.0] - .into_iter() - .cycle(); - let mut next_random = move || next_random.next().unwrap(); - - let generated_image: Rgb32FImage = ImageBuffer::from_fn(9, 31, |_x, _y| { - Rgb([next_random(), next_random(), next_random()]) - }); - - let mut bytes = vec![]; - write_rgb_image(Cursor::new(&mut bytes), &generated_image).unwrap(); - let decoded_image = read_as_rgb_image(Cursor::new(bytes)).unwrap(); - - debug_assert_eq!(generated_image, decoded_image); - } - - #[test] - fn compare_rgba_rgb() { - let exr_path = BASE_PATH - .iter() - .collect::<PathBuf>() - .join("overexposed gradient - data window equals display window.exr"); - - let rgb: Rgb32FImage = read_as_rgb_image_from_file(&exr_path).unwrap(); - let rgba: Rgba32FImage = read_as_rgba_image_from_file(&exr_path).unwrap(); - - assert_eq!(rgba.dimensions(), rgb.dimensions()); - - for (Rgb(rgb), Rgba(rgba)) in rgb.pixels().zip(rgba.pixels()) { - assert_eq!(rgb, &rgba[..3]); - } - } - - #[test] - fn compare_cropped() { - // like in photoshop, exr images may have layers placed anywhere in a canvas. - // we don't want to load the pixels from the layer, but we want to load the pixels from the canvas. - // a layer might be smaller than the canvas, in that case the canvas should be transparent black - // where no layer was covering it. a layer might also be larger than the canvas, - // these pixels should be discarded. - // - // in this test we want to make sure that an - // auto-cropped image will be reproduced to the original. - - let exr_path = BASE_PATH.iter().collect::<PathBuf>(); - let original = exr_path.clone().join("cropping - uncropped original.exr"); - let cropped = exr_path - .clone() - .join("cropping - data window differs display window.exr"); - - // smoke-check that the exr files are actually not the same - { - let original_exr = read_first_flat_layer_from_file(&original).unwrap(); - let cropped_exr = read_first_flat_layer_from_file(&cropped).unwrap(); - assert_eq!( - original_exr.attributes.display_window, - cropped_exr.attributes.display_window - ); - assert_ne!( - original_exr.layer_data.attributes.layer_position, - cropped_exr.layer_data.attributes.layer_position - ); - assert_ne!(original_exr.layer_data.size, cropped_exr.layer_data.size); - } - - // check that they result in the same image - let original: Rgba32FImage = read_as_rgba_image_from_file(&original).unwrap(); - let cropped: Rgba32FImage = read_as_rgba_image_from_file(&cropped).unwrap(); - assert_eq!(original.dimensions(), cropped.dimensions()); - - // the following is not a simple assert_eq, as in case of an error, - // the whole image would be printed to the console, which takes forever - assert!(original.pixels().zip(cropped.pixels()).all(|(a, b)| a == b)); - } -} diff --git a/vendor/image/src/codecs/png.rs b/vendor/image/src/codecs/png.rs deleted file mode 100644 index b9f98ce..0000000 --- a/vendor/image/src/codecs/png.rs +++ /dev/null @@ -1,778 +0,0 @@ -//! Decoding and Encoding of PNG Images -//! -//! PNG (Portable Network Graphics) is an image format that supports lossless compression. -//! -//! # Related Links -//! * <http://www.w3.org/TR/PNG/> - The PNG Specification -//! - -use std::convert::TryFrom; -use std::fmt; -use std::io::{self, Read, Write}; - -use num_rational::Ratio; -use png::{BlendOp, DisposeOp}; - -use crate::animation::{Delay, Frame, Frames}; -use crate::color::{Blend, ColorType, ExtendedColorType}; -use crate::error::{ - DecodingError, EncodingError, ImageError, ImageResult, LimitError, LimitErrorKind, - ParameterError, ParameterErrorKind, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{AnimationDecoder, ImageDecoder, ImageEncoder, ImageFormat}; -use crate::io::Limits; -use crate::{DynamicImage, GenericImage, ImageBuffer, Luma, LumaA, Rgb, Rgba, RgbaImage}; - -// http://www.w3.org/TR/PNG-Structure.html -// The first eight bytes of a PNG file always contain the following (decimal) values: -pub(crate) const PNG_SIGNATURE: [u8; 8] = [137, 80, 78, 71, 13, 10, 26, 10]; - -/// Png Reader -/// -/// This reader will try to read the png one row at a time, -/// however for interlaced png files this is not possible and -/// these are therefore read at once. -pub struct PngReader<R: Read> { - reader: png::Reader<R>, - buffer: Vec<u8>, - index: usize, -} - -impl<R: Read> PngReader<R> { - fn new(mut reader: png::Reader<R>) -> ImageResult<PngReader<R>> { - let len = reader.output_buffer_size(); - // Since interlaced images do not come in - // scanline order it is almost impossible to - // read them in a streaming fashion, however - // this shouldn't be a too big of a problem - // as most interlaced images should fit in memory. - let buffer = if reader.info().interlaced { - let mut buffer = vec![0; len]; - reader - .next_frame(&mut buffer) - .map_err(ImageError::from_png)?; - buffer - } else { - Vec::new() - }; - - Ok(PngReader { - reader, - buffer, - index: 0, - }) - } -} - -impl<R: Read> Read for PngReader<R> { - fn read(&mut self, mut buf: &mut [u8]) -> io::Result<usize> { - // io::Write::write for slice cannot fail - let readed = buf.write(&self.buffer[self.index..]).unwrap(); - - let mut bytes = readed; - self.index += readed; - - while self.index >= self.buffer.len() { - match self.reader.next_row()? { - Some(row) => { - // Faster to copy directly to external buffer - let readed = buf.write(row.data()).unwrap(); - bytes += readed; - - self.buffer = row.data()[readed..].to_owned(); - self.index = 0; - } - None => return Ok(bytes), - } - } - - Ok(bytes) - } - - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - let mut bytes = self.buffer.len(); - if buf.is_empty() { - std::mem::swap(&mut self.buffer, buf); - } else { - buf.extend_from_slice(&self.buffer); - self.buffer.clear(); - } - - self.index = 0; - - while let Some(row) = self.reader.next_row()? { - buf.extend_from_slice(row.data()); - bytes += row.data().len(); - } - - Ok(bytes) - } -} - -/// PNG decoder -pub struct PngDecoder<R: Read> { - color_type: ColorType, - reader: png::Reader<R>, -} - -impl<R: Read> PngDecoder<R> { - /// Creates a new decoder that decodes from the stream ```r``` - pub fn new(r: R) -> ImageResult<PngDecoder<R>> { - Self::with_limits(r, Limits::default()) - } - - /// Creates a new decoder that decodes from the stream ```r``` with the given limits. - pub fn with_limits(r: R, limits: Limits) -> ImageResult<PngDecoder<R>> { - limits.check_support(&crate::io::LimitSupport::default())?; - - let max_bytes = usize::try_from(limits.max_alloc.unwrap_or(u64::MAX)).unwrap_or(usize::MAX); - let mut decoder = png::Decoder::new_with_limits(r, png::Limits { bytes: max_bytes }); - - let info = decoder.read_header_info().map_err(ImageError::from_png)?; - limits.check_dimensions(info.width, info.height)?; - - // By default the PNG decoder will scale 16 bpc to 8 bpc, so custom - // transformations must be set. EXPAND preserves the default behavior - // expanding bpc < 8 to 8 bpc. - decoder.set_transformations(png::Transformations::EXPAND); - let reader = decoder.read_info().map_err(ImageError::from_png)?; - let (color_type, bits) = reader.output_color_type(); - let color_type = match (color_type, bits) { - (png::ColorType::Grayscale, png::BitDepth::Eight) => ColorType::L8, - (png::ColorType::Grayscale, png::BitDepth::Sixteen) => ColorType::L16, - (png::ColorType::GrayscaleAlpha, png::BitDepth::Eight) => ColorType::La8, - (png::ColorType::GrayscaleAlpha, png::BitDepth::Sixteen) => ColorType::La16, - (png::ColorType::Rgb, png::BitDepth::Eight) => ColorType::Rgb8, - (png::ColorType::Rgb, png::BitDepth::Sixteen) => ColorType::Rgb16, - (png::ColorType::Rgba, png::BitDepth::Eight) => ColorType::Rgba8, - (png::ColorType::Rgba, png::BitDepth::Sixteen) => ColorType::Rgba16, - - (png::ColorType::Grayscale, png::BitDepth::One) => { - return Err(unsupported_color(ExtendedColorType::L1)) - } - (png::ColorType::GrayscaleAlpha, png::BitDepth::One) => { - return Err(unsupported_color(ExtendedColorType::La1)) - } - (png::ColorType::Rgb, png::BitDepth::One) => { - return Err(unsupported_color(ExtendedColorType::Rgb1)) - } - (png::ColorType::Rgba, png::BitDepth::One) => { - return Err(unsupported_color(ExtendedColorType::Rgba1)) - } - - (png::ColorType::Grayscale, png::BitDepth::Two) => { - return Err(unsupported_color(ExtendedColorType::L2)) - } - (png::ColorType::GrayscaleAlpha, png::BitDepth::Two) => { - return Err(unsupported_color(ExtendedColorType::La2)) - } - (png::ColorType::Rgb, png::BitDepth::Two) => { - return Err(unsupported_color(ExtendedColorType::Rgb2)) - } - (png::ColorType::Rgba, png::BitDepth::Two) => { - return Err(unsupported_color(ExtendedColorType::Rgba2)) - } - - (png::ColorType::Grayscale, png::BitDepth::Four) => { - return Err(unsupported_color(ExtendedColorType::L4)) - } - (png::ColorType::GrayscaleAlpha, png::BitDepth::Four) => { - return Err(unsupported_color(ExtendedColorType::La4)) - } - (png::ColorType::Rgb, png::BitDepth::Four) => { - return Err(unsupported_color(ExtendedColorType::Rgb4)) - } - (png::ColorType::Rgba, png::BitDepth::Four) => { - return Err(unsupported_color(ExtendedColorType::Rgba4)) - } - - (png::ColorType::Indexed, bits) => { - return Err(unsupported_color(ExtendedColorType::Unknown(bits as u8))) - } - }; - - Ok(PngDecoder { color_type, reader }) - } - - /// Turn this into an iterator over the animation frames. - /// - /// Reading the complete animation requires more memory than reading the data from the IDAT - /// frame–multiple frame buffers need to be reserved at the same time. We further do not - /// support compositing 16-bit colors. In any case this would be lossy as the interface of - /// animation decoders does not support 16-bit colors. - /// - /// If something is not supported or a limit is violated then the decoding step that requires - /// them will fail and an error will be returned instead of the frame. No further frames will - /// be returned. - pub fn apng(self) -> ApngDecoder<R> { - ApngDecoder::new(self) - } - - /// Returns if the image contains an animation. - /// - /// Note that the file itself decides if the default image is considered to be part of the - /// animation. When it is not the common interpretation is to use it as a thumbnail. - /// - /// If a non-animated image is converted into an `ApngDecoder` then its iterator is empty. - pub fn is_apng(&self) -> bool { - self.reader.info().animation_control.is_some() - } -} - -fn unsupported_color(ect: ExtendedColorType) -> ImageError { - ImageError::Unsupported(UnsupportedError::from_format_and_kind( - ImageFormat::Png.into(), - UnsupportedErrorKind::Color(ect), - )) -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for PngDecoder<R> { - type Reader = PngReader<R>; - - fn dimensions(&self) -> (u32, u32) { - self.reader.info().size() - } - - fn color_type(&self) -> ColorType { - self.color_type - } - - fn icc_profile(&mut self) -> Option<Vec<u8>> { - self.reader.info().icc_profile.as_ref().map(|x| x.to_vec()) - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - PngReader::new(self.reader) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - use byteorder::{BigEndian, ByteOrder, NativeEndian}; - - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - self.reader.next_frame(buf).map_err(ImageError::from_png)?; - // PNG images are big endian. For 16 bit per channel and larger types, - // the buffer may need to be reordered to native endianness per the - // contract of `read_image`. - // TODO: assumes equal channel bit depth. - let bpc = self.color_type().bytes_per_pixel() / self.color_type().channel_count(); - - match bpc { - 1 => (), // No reodering necessary for u8 - 2 => buf.chunks_mut(2).for_each(|c| { - let v = BigEndian::read_u16(c); - NativeEndian::write_u16(c, v) - }), - _ => unreachable!(), - } - Ok(()) - } - - fn scanline_bytes(&self) -> u64 { - let width = self.reader.info().width; - self.reader.output_line_size(width) as u64 - } -} - -/// An [`AnimationDecoder`] adapter of [`PngDecoder`]. -/// -/// See [`PngDecoder::apng`] for more information. -/// -/// [`AnimationDecoder`]: ../trait.AnimationDecoder.html -/// [`PngDecoder`]: struct.PngDecoder.html -/// [`PngDecoder::apng`]: struct.PngDecoder.html#method.apng -pub struct ApngDecoder<R: Read> { - inner: PngDecoder<R>, - /// The current output buffer. - current: RgbaImage, - /// The previous output buffer, used for dispose op previous. - previous: RgbaImage, - /// The dispose op of the current frame. - dispose: DisposeOp, - /// The number of image still expected to be able to load. - remaining: u32, - /// The next (first) image is the thumbnail. - has_thumbnail: bool, -} - -impl<R: Read> ApngDecoder<R> { - fn new(inner: PngDecoder<R>) -> Self { - let (width, height) = inner.dimensions(); - let info = inner.reader.info(); - let remaining = match info.animation_control() { - // The expected number of fcTL in the remaining image. - Some(actl) => actl.num_frames, - None => 0, - }; - // If the IDAT has no fcTL then it is not part of the animation counted by - // num_frames. All following fdAT chunks must be preceded by an fcTL - let has_thumbnail = info.frame_control.is_none(); - ApngDecoder { - inner, - // TODO: should we delay this allocation? At least if we support limits we should. - current: RgbaImage::new(width, height), - previous: RgbaImage::new(width, height), - dispose: DisposeOp::Background, - remaining, - has_thumbnail, - } - } - - // TODO: thumbnail(&mut self) -> Option<impl ImageDecoder<'_>> - - /// Decode one subframe and overlay it on the canvas. - fn mix_next_frame(&mut self) -> Result<Option<&RgbaImage>, ImageError> { - // Remove this image from remaining. - self.remaining = match self.remaining.checked_sub(1) { - None => return Ok(None), - Some(next) => next, - }; - - // Shorten ourselves to 0 in case of error. - let remaining = self.remaining; - self.remaining = 0; - - // Skip the thumbnail that is not part of the animation. - if self.has_thumbnail { - self.has_thumbnail = false; - let mut buffer = vec![0; self.inner.reader.output_buffer_size()]; - self.inner - .reader - .next_frame(&mut buffer) - .map_err(ImageError::from_png)?; - } - - self.animatable_color_type()?; - - // Dispose of the previous frame. - match self.dispose { - DisposeOp::None => { - self.previous.clone_from(&self.current); - } - DisposeOp::Background => { - self.previous.clone_from(&self.current); - self.current - .pixels_mut() - .for_each(|pixel| *pixel = Rgba([0, 0, 0, 0])); - } - DisposeOp::Previous => { - self.current.clone_from(&self.previous); - } - } - - // Read next frame data. - let mut buffer = vec![0; self.inner.reader.output_buffer_size()]; - self.inner - .reader - .next_frame(&mut buffer) - .map_err(ImageError::from_png)?; - let info = self.inner.reader.info(); - - // Find out how to interpret the decoded frame. - let (width, height, px, py, blend); - match info.frame_control() { - None => { - width = info.width; - height = info.height; - px = 0; - py = 0; - blend = BlendOp::Source; - } - Some(fc) => { - width = fc.width; - height = fc.height; - px = fc.x_offset; - py = fc.y_offset; - blend = fc.blend_op; - self.dispose = fc.dispose_op; - } - }; - - // Turn the data into an rgba image proper. - let source = match self.inner.color_type { - ColorType::L8 => { - let image = ImageBuffer::<Luma<_>, _>::from_raw(width, height, buffer).unwrap(); - DynamicImage::ImageLuma8(image).into_rgba8() - } - ColorType::La8 => { - let image = ImageBuffer::<LumaA<_>, _>::from_raw(width, height, buffer).unwrap(); - DynamicImage::ImageLumaA8(image).into_rgba8() - } - ColorType::Rgb8 => { - let image = ImageBuffer::<Rgb<_>, _>::from_raw(width, height, buffer).unwrap(); - DynamicImage::ImageRgb8(image).into_rgba8() - } - ColorType::Rgba8 => ImageBuffer::<Rgba<_>, _>::from_raw(width, height, buffer).unwrap(), - ColorType::L16 | ColorType::Rgb16 | ColorType::La16 | ColorType::Rgba16 => { - // TODO: to enable remove restriction in `animatable_color_type` method. - unreachable!("16-bit apng not yet support") - } - _ => unreachable!("Invalid png color"), - }; - - match blend { - BlendOp::Source => { - self.current - .copy_from(&source, px, py) - .expect("Invalid png image not detected in png"); - } - BlendOp::Over => { - // TODO: investigate speed, speed-ups, and bounds-checks. - for (x, y, p) in source.enumerate_pixels() { - self.current.get_pixel_mut(x + px, y + py).blend(p); - } - } - } - - // Ok, we can proceed with actually remaining images. - self.remaining = remaining; - // Return composited output buffer. - Ok(Some(&self.current)) - } - - fn animatable_color_type(&self) -> Result<(), ImageError> { - match self.inner.color_type { - ColorType::L8 | ColorType::Rgb8 | ColorType::La8 | ColorType::Rgba8 => Ok(()), - // TODO: do not handle multi-byte colors. Remember to implement it in `mix_next_frame`. - ColorType::L16 | ColorType::Rgb16 | ColorType::La16 | ColorType::Rgba16 => { - Err(unsupported_color(self.inner.color_type.into())) - } - _ => unreachable!("{:?} not a valid png color", self.inner.color_type), - } - } -} - -impl<'a, R: Read + 'a> AnimationDecoder<'a> for ApngDecoder<R> { - fn into_frames(self) -> Frames<'a> { - struct FrameIterator<R: Read>(ApngDecoder<R>); - - impl<R: Read> Iterator for FrameIterator<R> { - type Item = ImageResult<Frame>; - - fn next(&mut self) -> Option<Self::Item> { - let image = match self.0.mix_next_frame() { - Ok(Some(image)) => image.clone(), - Ok(None) => return None, - Err(err) => return Some(Err(err)), - }; - - let info = self.0.inner.reader.info(); - let fc = info.frame_control().unwrap(); - // PNG delays are rations in seconds. - let num = u32::from(fc.delay_num) * 1_000u32; - let denom = match fc.delay_den { - // The standard dictates to replace by 100 when the denominator is 0. - 0 => 100, - d => u32::from(d), - }; - let delay = Delay::from_ratio(Ratio::new(num, denom)); - Some(Ok(Frame::from_parts(image, 0, 0, delay))) - } - } - - Frames::new(Box::new(FrameIterator(self))) - } -} - -/// PNG encoder -pub struct PngEncoder<W: Write> { - w: W, - compression: CompressionType, - filter: FilterType, -} - -/// Compression level of a PNG encoder. The default setting is `Fast`. -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -#[non_exhaustive] -pub enum CompressionType { - /// Default compression level - Default, - /// Fast, minimal compression - Fast, - /// High compression level - Best, - /// Huffman coding compression - #[deprecated(note = "use one of the other compression levels instead, such as 'Fast'")] - Huffman, - /// Run-length encoding compression - #[deprecated(note = "use one of the other compression levels instead, such as 'Fast'")] - Rle, -} - -/// Filter algorithms used to process image data to improve compression. -/// -/// The default filter is `Adaptive`. -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -#[non_exhaustive] -pub enum FilterType { - /// No processing done, best used for low bit depth grayscale or data with a - /// low color count - NoFilter, - /// Filters based on previous pixel in the same scanline - Sub, - /// Filters based on the scanline above - Up, - /// Filters based on the average of left and right neighbor pixels - Avg, - /// Algorithm that takes into account the left, upper left, and above pixels - Paeth, - /// Uses a heuristic to select one of the preceding filters for each - /// scanline rather than one filter for the entire image - Adaptive, -} - -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -#[non_exhaustive] -enum BadPngRepresentation { - ColorType(ColorType), -} - -impl<W: Write> PngEncoder<W> { - /// Create a new encoder that writes its output to ```w``` - pub fn new(w: W) -> PngEncoder<W> { - PngEncoder { - w, - compression: CompressionType::default(), - filter: FilterType::default(), - } - } - - /// Create a new encoder that writes its output to `w` with `CompressionType` `compression` and - /// `FilterType` `filter`. - /// - /// It is best to view the options as a _hint_ to the implementation on the smallest or fastest - /// option for encoding a particular image. That is, using options that map directly to a PNG - /// image parameter will use this parameter where possible. But variants that have no direct - /// mapping may be interpreted differently in minor versions. The exact output is expressly - /// __not__ part the SemVer stability guarantee. - /// - /// Note that it is not optimal to use a single filter type, so an adaptive - /// filter type is selected as the default. The filter which best minimizes - /// file size may change with the type of compression used. - pub fn new_with_quality( - w: W, - compression: CompressionType, - filter: FilterType, - ) -> PngEncoder<W> { - PngEncoder { - w, - compression, - filter, - } - } - - /// Encodes the image `data` that has dimensions `width` and `height` and `ColorType` `c`. - /// - /// Expects data in big endian. - #[deprecated = "Use `PngEncoder::write_image` instead. Beware that `write_image` has a different endianness convention"] - pub fn encode(self, data: &[u8], width: u32, height: u32, color: ColorType) -> ImageResult<()> { - self.encode_inner(data, width, height, color) - } - - fn encode_inner( - self, - data: &[u8], - width: u32, - height: u32, - color: ColorType, - ) -> ImageResult<()> { - let (ct, bits) = match color { - ColorType::L8 => (png::ColorType::Grayscale, png::BitDepth::Eight), - ColorType::L16 => (png::ColorType::Grayscale, png::BitDepth::Sixteen), - ColorType::La8 => (png::ColorType::GrayscaleAlpha, png::BitDepth::Eight), - ColorType::La16 => (png::ColorType::GrayscaleAlpha, png::BitDepth::Sixteen), - ColorType::Rgb8 => (png::ColorType::Rgb, png::BitDepth::Eight), - ColorType::Rgb16 => (png::ColorType::Rgb, png::BitDepth::Sixteen), - ColorType::Rgba8 => (png::ColorType::Rgba, png::BitDepth::Eight), - ColorType::Rgba16 => (png::ColorType::Rgba, png::BitDepth::Sixteen), - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Png.into(), - UnsupportedErrorKind::Color(color.into()), - ), - )) - } - }; - let comp = match self.compression { - CompressionType::Default => png::Compression::Default, - CompressionType::Best => png::Compression::Best, - _ => png::Compression::Fast, - }; - let (filter, adaptive_filter) = match self.filter { - FilterType::NoFilter => ( - png::FilterType::NoFilter, - png::AdaptiveFilterType::NonAdaptive, - ), - FilterType::Sub => (png::FilterType::Sub, png::AdaptiveFilterType::NonAdaptive), - FilterType::Up => (png::FilterType::Up, png::AdaptiveFilterType::NonAdaptive), - FilterType::Avg => (png::FilterType::Avg, png::AdaptiveFilterType::NonAdaptive), - FilterType::Paeth => (png::FilterType::Paeth, png::AdaptiveFilterType::NonAdaptive), - FilterType::Adaptive => (png::FilterType::Sub, png::AdaptiveFilterType::Adaptive), - }; - - let mut encoder = png::Encoder::new(self.w, width, height); - encoder.set_color(ct); - encoder.set_depth(bits); - encoder.set_compression(comp); - encoder.set_filter(filter); - encoder.set_adaptive_filter(adaptive_filter); - let mut writer = encoder - .write_header() - .map_err(|e| ImageError::IoError(e.into()))?; - writer - .write_image_data(data) - .map_err(|e| ImageError::IoError(e.into())) - } -} - -impl<W: Write> ImageEncoder for PngEncoder<W> { - /// Write a PNG image with the specified width, height, and color type. - /// - /// For color types with 16-bit per channel or larger, the contents of `buf` should be in - /// native endian. PngEncoder will automatically convert to big endian as required by the - /// underlying PNG format. - fn write_image( - self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - use byteorder::{BigEndian, ByteOrder, NativeEndian}; - use ColorType::*; - - // PNG images are big endian. For 16 bit per channel and larger types, - // the buffer may need to be reordered to big endian per the - // contract of `write_image`. - // TODO: assumes equal channel bit depth. - match color_type { - L8 | La8 | Rgb8 | Rgba8 => { - // No reodering necessary for u8 - self.encode_inner(buf, width, height, color_type) - } - L16 | La16 | Rgb16 | Rgba16 => { - // Because the buffer is immutable and the PNG encoder does not - // yet take Write/Read traits, create a temporary buffer for - // big endian reordering. - let mut reordered = vec![0; buf.len()]; - buf.chunks(2) - .zip(reordered.chunks_mut(2)) - .for_each(|(b, r)| BigEndian::write_u16(r, NativeEndian::read_u16(b))); - self.encode_inner(&reordered, width, height, color_type) - } - _ => Err(ImageError::Encoding(EncodingError::new( - ImageFormat::Png.into(), - BadPngRepresentation::ColorType(color_type), - ))), - } - } -} - -impl ImageError { - fn from_png(err: png::DecodingError) -> ImageError { - use png::DecodingError::*; - match err { - IoError(err) => ImageError::IoError(err), - // The input image was not a valid PNG. - err @ Format(_) => { - ImageError::Decoding(DecodingError::new(ImageFormat::Png.into(), err)) - } - // Other is used when: - // - The decoder is polled for more animation frames despite being done (or not being animated - // in the first place). - // - The output buffer does not have the required size. - err @ Parameter(_) => ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic(err.to_string()), - )), - LimitsExceeded => { - ImageError::Limits(LimitError::from_kind(LimitErrorKind::InsufficientMemory)) - } - } - } -} - -impl Default for CompressionType { - fn default() -> Self { - CompressionType::Fast - } -} - -impl Default for FilterType { - fn default() -> Self { - FilterType::Adaptive - } -} - -impl fmt::Display for BadPngRepresentation { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - match self { - Self::ColorType(color_type) => write!( - f, - "The color {:?} can not be represented in PNG.", - color_type - ), - } - } -} - -impl std::error::Error for BadPngRepresentation {} - -#[cfg(test)] -mod tests { - use super::*; - use crate::image::ImageDecoder; - use crate::ImageOutputFormat; - - use std::io::{Cursor, Read}; - - #[test] - fn ensure_no_decoder_off_by_one() { - let dec = PngDecoder::new( - std::fs::File::open("tests/images/png/bugfixes/debug_triangle_corners_widescreen.png") - .unwrap(), - ) - .expect("Unable to read PNG file (does it exist?)"); - - assert_eq![(2000, 1000), dec.dimensions()]; - - assert_eq![ - ColorType::Rgb8, - dec.color_type(), - "Image MUST have the Rgb8 format" - ]; - - let correct_bytes = dec - .into_reader() - .expect("Unable to read file") - .bytes() - .map(|x| x.expect("Unable to read byte")) - .collect::<Vec<u8>>(); - - assert_eq![6_000_000, correct_bytes.len()]; - } - - #[test] - fn underlying_error() { - use std::error::Error; - - let mut not_png = - std::fs::read("tests/images/png/bugfixes/debug_triangle_corners_widescreen.png") - .unwrap(); - not_png[0] = 0; - - let error = PngDecoder::new(¬_png[..]).err().unwrap(); - let _ = error - .source() - .unwrap() - .downcast_ref::<png::DecodingError>() - .expect("Caused by a png error"); - } - - #[test] - fn encode_bad_color_type() { - // regression test for issue #1663 - let image = DynamicImage::new_rgb32f(1, 1); - let mut target = Cursor::new(vec![]); - let _ = image.write_to(&mut target, ImageOutputFormat::Png); - } -} diff --git a/vendor/image/src/codecs/pnm/autobreak.rs b/vendor/image/src/codecs/pnm/autobreak.rs deleted file mode 100644 index cea2cd8..0000000 --- a/vendor/image/src/codecs/pnm/autobreak.rs +++ /dev/null @@ -1,124 +0,0 @@ -//! Insert line breaks between written buffers when they would overflow the line length. -use std::io; - -// The pnm standard says to insert line breaks after 70 characters. Assumes that no line breaks -// are actually written. We have to be careful to fully commit buffers or not commit them at all, -// otherwise we might insert a newline in the middle of a token. -pub(crate) struct AutoBreak<W: io::Write> { - wrapped: W, - line_capacity: usize, - line: Vec<u8>, - has_newline: bool, - panicked: bool, // see https://github.com/rust-lang/rust/issues/30888 -} - -impl<W: io::Write> AutoBreak<W> { - pub(crate) fn new(writer: W, line_capacity: usize) -> Self { - AutoBreak { - wrapped: writer, - line_capacity, - line: Vec::with_capacity(line_capacity + 1), - has_newline: false, - panicked: false, - } - } - - fn flush_buf(&mut self) -> io::Result<()> { - // from BufWriter - let mut written = 0; - let len = self.line.len(); - let mut ret = Ok(()); - while written < len { - self.panicked = true; - let r = self.wrapped.write(&self.line[written..]); - self.panicked = false; - match r { - Ok(0) => { - ret = Err(io::Error::new( - io::ErrorKind::WriteZero, - "failed to write the buffered data", - )); - break; - } - Ok(n) => written += n, - Err(ref e) if e.kind() == io::ErrorKind::Interrupted => {} - Err(e) => { - ret = Err(e); - break; - } - } - } - if written > 0 { - self.line.drain(..written); - } - ret - } -} - -impl<W: io::Write> io::Write for AutoBreak<W> { - fn write(&mut self, buffer: &[u8]) -> io::Result<usize> { - if self.has_newline { - self.flush()?; - self.has_newline = false; - } - - if !self.line.is_empty() && self.line.len() + buffer.len() > self.line_capacity { - self.line.push(b'\n'); - self.has_newline = true; - self.flush()?; - self.has_newline = false; - } - - self.line.extend_from_slice(buffer); - Ok(buffer.len()) - } - - fn flush(&mut self) -> io::Result<()> { - self.flush_buf()?; - self.wrapped.flush() - } -} - -impl<W: io::Write> Drop for AutoBreak<W> { - fn drop(&mut self) { - if !self.panicked { - let _r = self.flush_buf(); - // internal writer flushed automatically by Drop - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - use std::io::Write; - - #[test] - fn test_aligned_writes() { - let mut output = Vec::new(); - - { - let mut writer = AutoBreak::new(&mut output, 10); - writer.write_all(b"0123456789").unwrap(); - writer.write_all(b"0123456789").unwrap(); - } - - assert_eq!(output.as_slice(), b"0123456789\n0123456789"); - } - - #[test] - fn test_greater_writes() { - let mut output = Vec::new(); - - { - let mut writer = AutoBreak::new(&mut output, 10); - writer.write_all(b"012").unwrap(); - writer.write_all(b"345").unwrap(); - writer.write_all(b"0123456789").unwrap(); - writer.write_all(b"012345678910").unwrap(); - writer.write_all(b"_").unwrap(); - } - - assert_eq!(output.as_slice(), b"012345\n0123456789\n012345678910\n_"); - } -} diff --git a/vendor/image/src/codecs/pnm/decoder.rs b/vendor/image/src/codecs/pnm/decoder.rs deleted file mode 100644 index a495871..0000000 --- a/vendor/image/src/codecs/pnm/decoder.rs +++ /dev/null @@ -1,1272 +0,0 @@ -use std::convert::TryFrom; -use std::convert::TryInto; -use std::error; -use std::fmt::{self, Display}; -use std::io::{self, BufRead, Cursor, Read}; -use std::marker::PhantomData; -use std::mem; -use std::num::ParseIntError; -use std::str::{self, FromStr}; - -use super::{ArbitraryHeader, ArbitraryTuplType, BitmapHeader, GraymapHeader, PixmapHeader}; -use super::{HeaderRecord, PnmHeader, PnmSubtype, SampleEncoding}; -use crate::color::{ColorType, ExtendedColorType}; -use crate::error::{ - DecodingError, ImageError, ImageResult, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{self, ImageDecoder, ImageFormat}; -use crate::utils; - -use byteorder::{BigEndian, ByteOrder, NativeEndian}; - -/// All errors that can occur when attempting to parse a PNM -#[derive(Debug, Clone)] -enum DecoderError { - /// PNM's "P[123456]" signature wrong or missing - PnmMagicInvalid([u8; 2]), - /// Couldn't parse the specified string as an integer from the specified source - UnparsableValue(ErrorDataSource, String, ParseIntError), - - /// More than the exactly one allowed plane specified by the format - NonAsciiByteInHeader(u8), - /// The PAM header contained a non-ASCII byte - NonAsciiLineInPamHeader, - /// A sample string contained a non-ASCII byte - NonAsciiSample, - - /// The byte after the P7 magic was not 0x0A NEWLINE - NotNewlineAfterP7Magic(u8), - /// The PNM header had too few lines - UnexpectedPnmHeaderEnd, - - /// The specified line was specified twice - HeaderLineDuplicated(PnmHeaderLine), - /// The line with the specified ID was not understood - HeaderLineUnknown(String), - /// At least one of the required lines were missing from the header (are `None` here) - /// - /// Same names as [`PnmHeaderLine`](enum.PnmHeaderLine.html) - #[allow(missing_docs)] - HeaderLineMissing { - height: Option<u32>, - width: Option<u32>, - depth: Option<u32>, - maxval: Option<u32>, - }, - - /// Not enough data was provided to the Decoder to decode the image - InputTooShort, - /// Sample raster contained unexpected byte - UnexpectedByteInRaster(u8), - /// Specified sample was out of bounds (e.g. >1 in B&W) - SampleOutOfBounds(u8), - /// The image's maxval exceeds 0xFFFF - MaxvalTooBig(u32), - - /// The specified tuple type supports restricted depths and maxvals, those restrictions were not met - InvalidDepthOrMaxval { - tuple_type: ArbitraryTuplType, - depth: u32, - maxval: u32, - }, - /// The specified tuple type supports restricted depths, those restrictions were not met - InvalidDepth { - tuple_type: ArbitraryTuplType, - depth: u32, - }, - /// The tuple type was not recognised by the parser - TupleTypeUnrecognised, - - /// Overflowed the specified value when parsing - Overflow, -} - -impl Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::PnmMagicInvalid(magic) => f.write_fmt(format_args!( - "Expected magic constant for PNM: P1..P7, got [{:#04X?}, {:#04X?}]", - magic[0], magic[1] - )), - DecoderError::UnparsableValue(src, data, err) => { - f.write_fmt(format_args!("Error parsing {:?} as {}: {}", data, src, err)) - } - - DecoderError::NonAsciiByteInHeader(c) => { - f.write_fmt(format_args!("Non-ASCII character {:#04X?} in header", c)) - } - DecoderError::NonAsciiLineInPamHeader => f.write_str("Non-ASCII line in PAM header"), - DecoderError::NonAsciiSample => { - f.write_str("Non-ASCII character where sample value was expected") - } - - DecoderError::NotNewlineAfterP7Magic(c) => f.write_fmt(format_args!( - "Expected newline after P7 magic, got {:#04X?}", - c - )), - DecoderError::UnexpectedPnmHeaderEnd => f.write_str("Unexpected end of PNM header"), - - DecoderError::HeaderLineDuplicated(line) => { - f.write_fmt(format_args!("Duplicate {} line", line)) - } - DecoderError::HeaderLineUnknown(identifier) => f.write_fmt(format_args!( - "Unknown header line with identifier {:?}", - identifier - )), - DecoderError::HeaderLineMissing { - height, - width, - depth, - maxval, - } => f.write_fmt(format_args!( - "Missing header line: have height={:?}, width={:?}, depth={:?}, maxval={:?}", - height, width, depth, maxval - )), - - DecoderError::InputTooShort => { - f.write_str("Not enough data was provided to the Decoder to decode the image") - } - DecoderError::UnexpectedByteInRaster(c) => f.write_fmt(format_args!( - "Unexpected character {:#04X?} within sample raster", - c - )), - DecoderError::SampleOutOfBounds(val) => { - f.write_fmt(format_args!("Sample value {} outside of bounds", val)) - } - DecoderError::MaxvalTooBig(maxval) => { - f.write_fmt(format_args!("Image MAXVAL exceeds {}: {}", 0xFFFF, maxval)) - } - - DecoderError::InvalidDepthOrMaxval { - tuple_type, - depth, - maxval, - } => f.write_fmt(format_args!( - "Invalid depth ({}) or maxval ({}) for tuple type {}", - depth, - maxval, - tuple_type.name() - )), - DecoderError::InvalidDepth { tuple_type, depth } => f.write_fmt(format_args!( - "Invalid depth ({}) for tuple type {}", - depth, - tuple_type.name() - )), - DecoderError::TupleTypeUnrecognised => f.write_str("Tuple type not recognized"), - DecoderError::Overflow => f.write_str("Overflow when parsing value"), - } - } -} - -/// Note: should `pnm` be extracted into a separate crate, -/// this will need to be hidden until that crate hits version `1.0`. -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::Pnm.into(), e)) - } -} - -impl error::Error for DecoderError { - fn source(&self) -> Option<&(dyn error::Error + 'static)> { - match self { - DecoderError::UnparsableValue(_, _, err) => Some(err), - _ => None, - } - } -} - -/// Single-value lines in a PNM header -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum PnmHeaderLine { - /// "HEIGHT" - Height, - /// "WIDTH" - Width, - /// "DEPTH" - Depth, - /// "MAXVAL", a.k.a. `maxwhite` - Maxval, -} - -impl Display for PnmHeaderLine { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str(match self { - PnmHeaderLine::Height => "HEIGHT", - PnmHeaderLine::Width => "WIDTH", - PnmHeaderLine::Depth => "DEPTH", - PnmHeaderLine::Maxval => "MAXVAL", - }) - } -} - -/// Single-value lines in a PNM header -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum ErrorDataSource { - /// One of the header lines - Line(PnmHeaderLine), - /// Value in the preamble - Preamble, - /// Sample/pixel data - Sample, -} - -impl Display for ErrorDataSource { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - ErrorDataSource::Line(l) => l.fmt(f), - ErrorDataSource::Preamble => f.write_str("number in preamble"), - ErrorDataSource::Sample => f.write_str("sample"), - } - } -} - -/// Dynamic representation, represents all decodable (sample, depth) combinations. -#[derive(Clone, Copy)] -enum TupleType { - PbmBit, - BWBit, - GrayU8, - GrayU16, - RGBU8, - RGBU16, -} - -trait Sample { - fn bytelen(width: u32, height: u32, samples: u32) -> ImageResult<usize>; - fn from_bytes(bytes: &[u8], row_size: usize, output_buf: &mut [u8]) -> ImageResult<()>; - fn from_ascii(reader: &mut dyn Read, output_buf: &mut [u8]) -> ImageResult<()>; -} - -struct U8; -struct U16; -struct PbmBit; -struct BWBit; - -trait DecodableImageHeader { - fn tuple_type(&self) -> ImageResult<TupleType>; -} - -/// PNM decoder -pub struct PnmDecoder<R> { - reader: R, - header: PnmHeader, - tuple: TupleType, -} - -impl<R: BufRead> PnmDecoder<R> { - /// Create a new decoder that decodes from the stream ```read``` - pub fn new(mut buffered_read: R) -> ImageResult<PnmDecoder<R>> { - let magic = buffered_read.read_magic_constant()?; - - let subtype = match magic { - [b'P', b'1'] => PnmSubtype::Bitmap(SampleEncoding::Ascii), - [b'P', b'2'] => PnmSubtype::Graymap(SampleEncoding::Ascii), - [b'P', b'3'] => PnmSubtype::Pixmap(SampleEncoding::Ascii), - [b'P', b'4'] => PnmSubtype::Bitmap(SampleEncoding::Binary), - [b'P', b'5'] => PnmSubtype::Graymap(SampleEncoding::Binary), - [b'P', b'6'] => PnmSubtype::Pixmap(SampleEncoding::Binary), - [b'P', b'7'] => PnmSubtype::ArbitraryMap, - _ => return Err(DecoderError::PnmMagicInvalid(magic).into()), - }; - - let decoder = match subtype { - PnmSubtype::Bitmap(enc) => PnmDecoder::read_bitmap_header(buffered_read, enc), - PnmSubtype::Graymap(enc) => PnmDecoder::read_graymap_header(buffered_read, enc), - PnmSubtype::Pixmap(enc) => PnmDecoder::read_pixmap_header(buffered_read, enc), - PnmSubtype::ArbitraryMap => PnmDecoder::read_arbitrary_header(buffered_read), - }?; - - if utils::check_dimension_overflow( - decoder.dimensions().0, - decoder.dimensions().1, - decoder.color_type().bytes_per_pixel(), - ) { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Image dimensions ({}x{}) are too large", - decoder.dimensions().0, - decoder.dimensions().1 - )), - ), - )); - } - - Ok(decoder) - } - - /// Extract the reader and header after an image has been read. - pub fn into_inner(self) -> (R, PnmHeader) { - (self.reader, self.header) - } - - fn read_bitmap_header(mut reader: R, encoding: SampleEncoding) -> ImageResult<PnmDecoder<R>> { - let header = reader.read_bitmap_header(encoding)?; - Ok(PnmDecoder { - reader, - tuple: TupleType::PbmBit, - header: PnmHeader { - decoded: HeaderRecord::Bitmap(header), - encoded: None, - }, - }) - } - - fn read_graymap_header(mut reader: R, encoding: SampleEncoding) -> ImageResult<PnmDecoder<R>> { - let header = reader.read_graymap_header(encoding)?; - let tuple_type = header.tuple_type()?; - Ok(PnmDecoder { - reader, - tuple: tuple_type, - header: PnmHeader { - decoded: HeaderRecord::Graymap(header), - encoded: None, - }, - }) - } - - fn read_pixmap_header(mut reader: R, encoding: SampleEncoding) -> ImageResult<PnmDecoder<R>> { - let header = reader.read_pixmap_header(encoding)?; - let tuple_type = header.tuple_type()?; - Ok(PnmDecoder { - reader, - tuple: tuple_type, - header: PnmHeader { - decoded: HeaderRecord::Pixmap(header), - encoded: None, - }, - }) - } - - fn read_arbitrary_header(mut reader: R) -> ImageResult<PnmDecoder<R>> { - let header = reader.read_arbitrary_header()?; - let tuple_type = header.tuple_type()?; - Ok(PnmDecoder { - reader, - tuple: tuple_type, - header: PnmHeader { - decoded: HeaderRecord::Arbitrary(header), - encoded: None, - }, - }) - } -} - -trait HeaderReader: BufRead { - /// Reads the two magic constant bytes - fn read_magic_constant(&mut self) -> ImageResult<[u8; 2]> { - let mut magic: [u8; 2] = [0, 0]; - self.read_exact(&mut magic)?; - Ok(magic) - } - - /// Reads a string as well as a single whitespace after it, ignoring comments - fn read_next_string(&mut self) -> ImageResult<String> { - let mut bytes = Vec::new(); - - // pair input bytes with a bool mask to remove comments - let mark_comments = self.bytes().scan(true, |partof, read| { - let byte = match read { - Err(err) => return Some((*partof, Err(err))), - Ok(byte) => byte, - }; - let cur_enabled = *partof && byte != b'#'; - let next_enabled = cur_enabled || (byte == b'\r' || byte == b'\n'); - *partof = next_enabled; - Some((cur_enabled, Ok(byte))) - }); - - for (_, byte) in mark_comments.filter(|e| e.0) { - match byte { - Ok(b'\t') | Ok(b'\n') | Ok(b'\x0b') | Ok(b'\x0c') | Ok(b'\r') | Ok(b' ') => { - if !bytes.is_empty() { - break; // We're done as we already have some content - } - } - Ok(byte) if !byte.is_ascii() => { - return Err(DecoderError::NonAsciiByteInHeader(byte).into()) - } - Ok(byte) => { - bytes.push(byte); - } - Err(_) => break, - } - } - - if bytes.is_empty() { - return Err(ImageError::IoError(io::ErrorKind::UnexpectedEof.into())); - } - - if !bytes.as_slice().is_ascii() { - // We have only filled the buffer with characters for which `byte.is_ascii()` holds. - unreachable!("Non-ASCII character should have returned sooner") - } - - let string = String::from_utf8(bytes) - // We checked the precondition ourselves a few lines before, `bytes.as_slice().is_ascii()`. - .unwrap_or_else(|_| unreachable!("Only ASCII characters should be decoded")); - - Ok(string) - } - - /// Read the next line - fn read_next_line(&mut self) -> ImageResult<String> { - let mut buffer = String::new(); - self.read_line(&mut buffer)?; - Ok(buffer) - } - - fn read_next_u32(&mut self) -> ImageResult<u32> { - let s = self.read_next_string()?; - s.parse::<u32>() - .map_err(|err| DecoderError::UnparsableValue(ErrorDataSource::Preamble, s, err).into()) - } - - fn read_bitmap_header(&mut self, encoding: SampleEncoding) -> ImageResult<BitmapHeader> { - let width = self.read_next_u32()?; - let height = self.read_next_u32()?; - Ok(BitmapHeader { - encoding, - width, - height, - }) - } - - fn read_graymap_header(&mut self, encoding: SampleEncoding) -> ImageResult<GraymapHeader> { - self.read_pixmap_header(encoding).map( - |PixmapHeader { - encoding, - width, - height, - maxval, - }| GraymapHeader { - encoding, - width, - height, - maxwhite: maxval, - }, - ) - } - - fn read_pixmap_header(&mut self, encoding: SampleEncoding) -> ImageResult<PixmapHeader> { - let width = self.read_next_u32()?; - let height = self.read_next_u32()?; - let maxval = self.read_next_u32()?; - Ok(PixmapHeader { - encoding, - width, - height, - maxval, - }) - } - - fn read_arbitrary_header(&mut self) -> ImageResult<ArbitraryHeader> { - fn parse_single_value_line( - line_val: &mut Option<u32>, - rest: &str, - line: PnmHeaderLine, - ) -> ImageResult<()> { - if line_val.is_some() { - Err(DecoderError::HeaderLineDuplicated(line).into()) - } else { - let v = rest.trim().parse().map_err(|err| { - DecoderError::UnparsableValue(ErrorDataSource::Line(line), rest.to_owned(), err) - })?; - *line_val = Some(v); - Ok(()) - } - } - - match self.bytes().next() { - None => return Err(ImageError::IoError(io::ErrorKind::UnexpectedEof.into())), - Some(Err(io)) => return Err(ImageError::IoError(io)), - Some(Ok(b'\n')) => (), - Some(Ok(c)) => return Err(DecoderError::NotNewlineAfterP7Magic(c).into()), - } - - let mut line = String::new(); - let mut height: Option<u32> = None; - let mut width: Option<u32> = None; - let mut depth: Option<u32> = None; - let mut maxval: Option<u32> = None; - let mut tupltype: Option<String> = None; - loop { - line.truncate(0); - let len = self.read_line(&mut line)?; - if len == 0 { - return Err(DecoderError::UnexpectedPnmHeaderEnd.into()); - } - if line.as_bytes()[0] == b'#' { - continue; - } - if !line.is_ascii() { - return Err(DecoderError::NonAsciiLineInPamHeader.into()); - } - #[allow(deprecated)] - let (identifier, rest) = line - .trim_left() - .split_at(line.find(char::is_whitespace).unwrap_or(line.len())); - match identifier { - "ENDHDR" => break, - "HEIGHT" => parse_single_value_line(&mut height, rest, PnmHeaderLine::Height)?, - "WIDTH" => parse_single_value_line(&mut width, rest, PnmHeaderLine::Width)?, - "DEPTH" => parse_single_value_line(&mut depth, rest, PnmHeaderLine::Depth)?, - "MAXVAL" => parse_single_value_line(&mut maxval, rest, PnmHeaderLine::Maxval)?, - "TUPLTYPE" => { - let identifier = rest.trim(); - if tupltype.is_some() { - let appended = tupltype.take().map(|mut v| { - v.push(' '); - v.push_str(identifier); - v - }); - tupltype = appended; - } else { - tupltype = Some(identifier.to_string()); - } - } - _ => return Err(DecoderError::HeaderLineUnknown(identifier.to_string()).into()), - } - } - - let (h, w, d, m) = match (height, width, depth, maxval) { - (Some(h), Some(w), Some(d), Some(m)) => (h, w, d, m), - _ => { - return Err(DecoderError::HeaderLineMissing { - height, - width, - depth, - maxval, - } - .into()) - } - }; - - let tupltype = match tupltype { - None => None, - Some(ref t) if t == "BLACKANDWHITE" => Some(ArbitraryTuplType::BlackAndWhite), - Some(ref t) if t == "BLACKANDWHITE_ALPHA" => { - Some(ArbitraryTuplType::BlackAndWhiteAlpha) - } - Some(ref t) if t == "GRAYSCALE" => Some(ArbitraryTuplType::Grayscale), - Some(ref t) if t == "GRAYSCALE_ALPHA" => Some(ArbitraryTuplType::GrayscaleAlpha), - Some(ref t) if t == "RGB" => Some(ArbitraryTuplType::RGB), - Some(ref t) if t == "RGB_ALPHA" => Some(ArbitraryTuplType::RGBAlpha), - Some(other) => Some(ArbitraryTuplType::Custom(other)), - }; - - Ok(ArbitraryHeader { - height: h, - width: w, - depth: d, - maxval: m, - tupltype, - }) - } -} - -impl<R> HeaderReader for R where R: BufRead {} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct PnmReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for PnmReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for PnmDecoder<R> { - type Reader = PnmReader<R>; - - fn dimensions(&self) -> (u32, u32) { - (self.header.width(), self.header.height()) - } - - fn color_type(&self) -> ColorType { - match self.tuple { - TupleType::PbmBit => ColorType::L8, - TupleType::BWBit => ColorType::L8, - TupleType::GrayU8 => ColorType::L8, - TupleType::GrayU16 => ColorType::L16, - TupleType::RGBU8 => ColorType::Rgb8, - TupleType::RGBU16 => ColorType::Rgb16, - } - } - - fn original_color_type(&self) -> ExtendedColorType { - match self.tuple { - TupleType::PbmBit => ExtendedColorType::L1, - TupleType::BWBit => ExtendedColorType::L1, - TupleType::GrayU8 => ExtendedColorType::L8, - TupleType::GrayU16 => ExtendedColorType::L16, - TupleType::RGBU8 => ExtendedColorType::Rgb8, - TupleType::RGBU16 => ExtendedColorType::Rgb16, - } - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(PnmReader( - Cursor::new(image::decoder_to_vec(self)?), - PhantomData, - )) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - match self.tuple { - TupleType::PbmBit => self.read_samples::<PbmBit>(1, buf), - TupleType::BWBit => self.read_samples::<BWBit>(1, buf), - TupleType::RGBU8 => self.read_samples::<U8>(3, buf), - TupleType::RGBU16 => self.read_samples::<U16>(3, buf), - TupleType::GrayU8 => self.read_samples::<U8>(1, buf), - TupleType::GrayU16 => self.read_samples::<U16>(1, buf), - } - } -} - -impl<R: Read> PnmDecoder<R> { - fn read_samples<S: Sample>(&mut self, components: u32, buf: &mut [u8]) -> ImageResult<()> { - match self.subtype().sample_encoding() { - SampleEncoding::Binary => { - let width = self.header.width(); - let height = self.header.height(); - let bytecount = S::bytelen(width, height, components)?; - - let mut bytes = vec![]; - self.reader - .by_ref() - // This conversion is potentially lossy but unlikely and in that case we error - // later anyways. - .take(bytecount as u64) - .read_to_end(&mut bytes)?; - if bytes.len() != bytecount { - return Err(DecoderError::InputTooShort.into()); - } - - let width: usize = width.try_into().map_err(|_| DecoderError::Overflow)?; - let components: usize = - components.try_into().map_err(|_| DecoderError::Overflow)?; - let row_size = width - .checked_mul(components) - .ok_or(DecoderError::Overflow)?; - - S::from_bytes(&bytes, row_size, buf) - } - SampleEncoding::Ascii => self.read_ascii::<S>(buf), - } - } - - fn read_ascii<Basic: Sample>(&mut self, output_buf: &mut [u8]) -> ImageResult<()> { - Basic::from_ascii(&mut self.reader, output_buf) - } - - /// Get the pnm subtype, depending on the magic constant contained in the header - pub fn subtype(&self) -> PnmSubtype { - self.header.subtype() - } -} - -fn read_separated_ascii<T: FromStr<Err = ParseIntError>>(reader: &mut dyn Read) -> ImageResult<T> -where - T::Err: Display, -{ - let is_separator = |v: &u8| matches! { *v, b'\t' | b'\n' | b'\x0b' | b'\x0c' | b'\r' | b' ' }; - - let token = reader - .bytes() - .skip_while(|v| v.as_ref().ok().map(is_separator).unwrap_or(false)) - .take_while(|v| v.as_ref().ok().map(|c| !is_separator(c)).unwrap_or(false)) - .collect::<Result<Vec<u8>, _>>()?; - - if !token.is_ascii() { - return Err(DecoderError::NonAsciiSample.into()); - } - - let string = str::from_utf8(&token) - // We checked the precondition ourselves a few lines before with `token.is_ascii()`. - .unwrap_or_else(|_| unreachable!("Only ASCII characters should be decoded")); - - string.parse().map_err(|err| { - DecoderError::UnparsableValue(ErrorDataSource::Sample, string.to_owned(), err).into() - }) -} - -impl Sample for U8 { - fn bytelen(width: u32, height: u32, samples: u32) -> ImageResult<usize> { - Ok((width * height * samples) as usize) - } - - fn from_bytes(bytes: &[u8], _row_size: usize, output_buf: &mut [u8]) -> ImageResult<()> { - output_buf.copy_from_slice(bytes); - Ok(()) - } - - fn from_ascii(reader: &mut dyn Read, output_buf: &mut [u8]) -> ImageResult<()> { - for b in output_buf { - *b = read_separated_ascii(reader)?; - } - Ok(()) - } -} - -impl Sample for U16 { - fn bytelen(width: u32, height: u32, samples: u32) -> ImageResult<usize> { - Ok((width * height * samples * 2) as usize) - } - - fn from_bytes(bytes: &[u8], _row_size: usize, output_buf: &mut [u8]) -> ImageResult<()> { - output_buf.copy_from_slice(bytes); - for chunk in output_buf.chunks_exact_mut(2) { - let v = BigEndian::read_u16(chunk); - NativeEndian::write_u16(chunk, v); - } - Ok(()) - } - - fn from_ascii(reader: &mut dyn Read, output_buf: &mut [u8]) -> ImageResult<()> { - for chunk in output_buf.chunks_exact_mut(2) { - let v = read_separated_ascii::<u16>(reader)?; - NativeEndian::write_u16(chunk, v); - } - Ok(()) - } -} - -// The image is encoded in rows of bits, high order bits first. Any bits beyond the row bits should -// be ignored. Also, contrary to rgb, black pixels are encoded as a 1 while white is 0. This will -// need to be reversed for the grayscale output. -impl Sample for PbmBit { - fn bytelen(width: u32, height: u32, samples: u32) -> ImageResult<usize> { - let count = width * samples; - let linelen = (count / 8) + ((count % 8) != 0) as u32; - Ok((linelen * height) as usize) - } - - fn from_bytes(bytes: &[u8], row_size: usize, output_buf: &mut [u8]) -> ImageResult<()> { - let mut expanded = utils::expand_bits(1, row_size.try_into().unwrap(), bytes); - for b in expanded.iter_mut() { - *b = !*b; - } - output_buf.copy_from_slice(&expanded); - Ok(()) - } - - fn from_ascii(reader: &mut dyn Read, output_buf: &mut [u8]) -> ImageResult<()> { - let mut bytes = reader.bytes(); - for b in output_buf { - loop { - let byte = bytes - .next() - .ok_or_else::<ImageError, _>(|| DecoderError::InputTooShort.into())??; - match byte { - b'\t' | b'\n' | b'\x0b' | b'\x0c' | b'\r' | b' ' => continue, - b'0' => *b = 255, - b'1' => *b = 0, - c => return Err(DecoderError::UnexpectedByteInRaster(c).into()), - } - break; - } - } - - Ok(()) - } -} - -// Encoded just like a normal U8 but we check the values. -impl Sample for BWBit { - fn bytelen(width: u32, height: u32, samples: u32) -> ImageResult<usize> { - U8::bytelen(width, height, samples) - } - - fn from_bytes(bytes: &[u8], row_size: usize, output_buf: &mut [u8]) -> ImageResult<()> { - U8::from_bytes(bytes, row_size, output_buf)?; - if let Some(val) = output_buf.iter().find(|&val| *val > 1) { - return Err(DecoderError::SampleOutOfBounds(*val).into()); - } - Ok(()) - } - - fn from_ascii(_reader: &mut dyn Read, _output_buf: &mut [u8]) -> ImageResult<()> { - unreachable!("BW bits from anymaps are never encoded as ASCII") - } -} - -impl DecodableImageHeader for BitmapHeader { - fn tuple_type(&self) -> ImageResult<TupleType> { - Ok(TupleType::PbmBit) - } -} - -impl DecodableImageHeader for GraymapHeader { - fn tuple_type(&self) -> ImageResult<TupleType> { - match self.maxwhite { - v if v <= 0xFF => Ok(TupleType::GrayU8), - v if v <= 0xFFFF => Ok(TupleType::GrayU16), - _ => Err(DecoderError::MaxvalTooBig(self.maxwhite).into()), - } - } -} - -impl DecodableImageHeader for PixmapHeader { - fn tuple_type(&self) -> ImageResult<TupleType> { - match self.maxval { - v if v <= 0xFF => Ok(TupleType::RGBU8), - v if v <= 0xFFFF => Ok(TupleType::RGBU16), - _ => Err(DecoderError::MaxvalTooBig(self.maxval).into()), - } - } -} - -impl DecodableImageHeader for ArbitraryHeader { - fn tuple_type(&self) -> ImageResult<TupleType> { - match self.tupltype { - None if self.depth == 1 => Ok(TupleType::GrayU8), - None if self.depth == 2 => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::Color(ExtendedColorType::La8), - ), - )), - None if self.depth == 3 => Ok(TupleType::RGBU8), - None if self.depth == 4 => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::Color(ExtendedColorType::Rgba8), - ), - )), - - Some(ArbitraryTuplType::BlackAndWhite) if self.maxval == 1 && self.depth == 1 => { - Ok(TupleType::BWBit) - } - Some(ArbitraryTuplType::BlackAndWhite) => Err(DecoderError::InvalidDepthOrMaxval { - tuple_type: ArbitraryTuplType::BlackAndWhite, - maxval: self.maxval, - depth: self.depth, - } - .into()), - - Some(ArbitraryTuplType::Grayscale) if self.depth == 1 && self.maxval <= 0xFF => { - Ok(TupleType::GrayU8) - } - Some(ArbitraryTuplType::Grayscale) if self.depth <= 1 && self.maxval <= 0xFFFF => { - Ok(TupleType::GrayU16) - } - Some(ArbitraryTuplType::Grayscale) => Err(DecoderError::InvalidDepthOrMaxval { - tuple_type: ArbitraryTuplType::Grayscale, - maxval: self.maxval, - depth: self.depth, - } - .into()), - - Some(ArbitraryTuplType::RGB) if self.depth == 3 && self.maxval <= 0xFF => { - Ok(TupleType::RGBU8) - } - Some(ArbitraryTuplType::RGB) if self.depth == 3 && self.maxval <= 0xFFFF => { - Ok(TupleType::RGBU16) - } - Some(ArbitraryTuplType::RGB) => Err(DecoderError::InvalidDepth { - tuple_type: ArbitraryTuplType::RGB, - depth: self.depth, - } - .into()), - - Some(ArbitraryTuplType::BlackAndWhiteAlpha) => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Color type {}", - ArbitraryTuplType::BlackAndWhiteAlpha.name() - )), - ), - )), - Some(ArbitraryTuplType::GrayscaleAlpha) => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::Color(ExtendedColorType::La8), - ), - )), - Some(ArbitraryTuplType::RGBAlpha) => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::Color(ExtendedColorType::Rgba8), - ), - )), - Some(ArbitraryTuplType::Custom(ref custom)) => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::GenericFeature(format!("Tuple type {:?}", custom)), - ), - )), - None => Err(DecoderError::TupleTypeUnrecognised.into()), - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - /// Tests reading of a valid blackandwhite pam - #[test] - fn pam_blackandwhite() { - let pamdata = b"P7 -WIDTH 4 -HEIGHT 4 -DEPTH 1 -MAXVAL 1 -TUPLTYPE BLACKANDWHITE -# Comment line -ENDHDR -\x01\x00\x00\x01\x01\x00\x00\x01\x01\x00\x00\x01\x01\x00\x00\x01"; - let decoder = PnmDecoder::new(&pamdata[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::L8); - assert_eq!(decoder.original_color_type(), ExtendedColorType::L1); - assert_eq!(decoder.dimensions(), (4, 4)); - assert_eq!(decoder.subtype(), PnmSubtype::ArbitraryMap); - - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!( - image, - vec![ - 0x01, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x01, 0x00, - 0x00, 0x01 - ] - ); - match PnmDecoder::new(&pamdata[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Arbitrary(ArbitraryHeader { - width: 4, - height: 4, - maxval: 1, - depth: 1, - tupltype: Some(ArbitraryTuplType::BlackAndWhite), - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - /// Tests reading of a valid grayscale pam - #[test] - fn pam_grayscale() { - let pamdata = b"P7 -WIDTH 4 -HEIGHT 4 -DEPTH 1 -MAXVAL 255 -TUPLTYPE GRAYSCALE -# Comment line -ENDHDR -\xde\xad\xbe\xef\xde\xad\xbe\xef\xde\xad\xbe\xef\xde\xad\xbe\xef"; - let decoder = PnmDecoder::new(&pamdata[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::L8); - assert_eq!(decoder.dimensions(), (4, 4)); - assert_eq!(decoder.subtype(), PnmSubtype::ArbitraryMap); - - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!( - image, - vec![ - 0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, - 0xbe, 0xef - ] - ); - match PnmDecoder::new(&pamdata[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Arbitrary(ArbitraryHeader { - width: 4, - height: 4, - depth: 1, - maxval: 255, - tupltype: Some(ArbitraryTuplType::Grayscale), - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - /// Tests reading of a valid rgb pam - #[test] - fn pam_rgb() { - let pamdata = b"P7 -# Comment line -MAXVAL 255 -TUPLTYPE RGB -DEPTH 3 -WIDTH 2 -HEIGHT 2 -ENDHDR -\xde\xad\xbe\xef\xde\xad\xbe\xef\xde\xad\xbe\xef"; - let decoder = PnmDecoder::new(&pamdata[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::Rgb8); - assert_eq!(decoder.dimensions(), (2, 2)); - assert_eq!(decoder.subtype(), PnmSubtype::ArbitraryMap); - - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!( - image, - vec![0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xbe, 0xef] - ); - match PnmDecoder::new(&pamdata[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Arbitrary(ArbitraryHeader { - maxval: 255, - tupltype: Some(ArbitraryTuplType::RGB), - depth: 3, - width: 2, - height: 2, - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - #[test] - fn pbm_binary() { - // The data contains two rows of the image (each line is padded to the full byte). For - // comments on its format, see documentation of `impl SampleType for PbmBit`. - let pbmbinary = [&b"P4 6 2\n"[..], &[0b01101100 as u8, 0b10110111]].concat(); - let decoder = PnmDecoder::new(&pbmbinary[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::L8); - assert_eq!(decoder.original_color_type(), ExtendedColorType::L1); - assert_eq!(decoder.dimensions(), (6, 2)); - assert_eq!( - decoder.subtype(), - PnmSubtype::Bitmap(SampleEncoding::Binary) - ); - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!(image, vec![255, 0, 0, 255, 0, 0, 0, 255, 0, 0, 255, 0]); - match PnmDecoder::new(&pbmbinary[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Bitmap(BitmapHeader { - encoding: SampleEncoding::Binary, - width: 6, - height: 2, - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - /// A previous infinite loop. - #[test] - fn pbm_binary_ascii_termination() { - use std::io::{BufReader, Cursor, Error, ErrorKind, Read, Result}; - struct FailRead(Cursor<&'static [u8]>); - - impl Read for FailRead { - fn read(&mut self, buf: &mut [u8]) -> Result<usize> { - match self.0.read(buf) { - Ok(n) if n > 0 => Ok(n), - _ => Err(Error::new( - ErrorKind::BrokenPipe, - "Simulated broken pipe error", - )), - } - } - } - - let pbmbinary = BufReader::new(FailRead(Cursor::new(b"P1 1 1\n"))); - - let decoder = PnmDecoder::new(pbmbinary).unwrap(); - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder - .read_image(&mut image) - .expect_err("Image is malformed"); - } - - #[test] - fn pbm_ascii() { - // The data contains two rows of the image (each line is padded to the full byte). For - // comments on its format, see documentation of `impl SampleType for PbmBit`. Tests all - // whitespace characters that should be allowed (the 6 characters according to POSIX). - let pbmbinary = b"P1 6 2\n 0 1 1 0 1 1\n1 0 1 1 0\t\n\x0b\x0c\r1"; - let decoder = PnmDecoder::new(&pbmbinary[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::L8); - assert_eq!(decoder.original_color_type(), ExtendedColorType::L1); - assert_eq!(decoder.dimensions(), (6, 2)); - assert_eq!(decoder.subtype(), PnmSubtype::Bitmap(SampleEncoding::Ascii)); - - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!(image, vec![255, 0, 0, 255, 0, 0, 0, 255, 0, 0, 255, 0]); - match PnmDecoder::new(&pbmbinary[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Bitmap(BitmapHeader { - encoding: SampleEncoding::Ascii, - width: 6, - height: 2, - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - #[test] - fn pbm_ascii_nospace() { - // The data contains two rows of the image (each line is padded to the full byte). Notably, - // it is completely within specification for the ascii data not to contain separating - // whitespace for the pbm format or any mix. - let pbmbinary = b"P1 6 2\n011011101101"; - let decoder = PnmDecoder::new(&pbmbinary[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::L8); - assert_eq!(decoder.original_color_type(), ExtendedColorType::L1); - assert_eq!(decoder.dimensions(), (6, 2)); - assert_eq!(decoder.subtype(), PnmSubtype::Bitmap(SampleEncoding::Ascii)); - - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!(image, vec![255, 0, 0, 255, 0, 0, 0, 255, 0, 0, 255, 0]); - match PnmDecoder::new(&pbmbinary[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Bitmap(BitmapHeader { - encoding: SampleEncoding::Ascii, - width: 6, - height: 2, - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - #[test] - fn pgm_binary() { - // The data contains two rows of the image (each line is padded to the full byte). For - // comments on its format, see documentation of `impl SampleType for PbmBit`. - let elements = (0..16).collect::<Vec<_>>(); - let pbmbinary = [&b"P5 4 4 255\n"[..], &elements].concat(); - let decoder = PnmDecoder::new(&pbmbinary[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::L8); - assert_eq!(decoder.dimensions(), (4, 4)); - assert_eq!( - decoder.subtype(), - PnmSubtype::Graymap(SampleEncoding::Binary) - ); - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!(image, elements); - match PnmDecoder::new(&pbmbinary[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Graymap(GraymapHeader { - encoding: SampleEncoding::Binary, - width: 4, - height: 4, - maxwhite: 255, - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - #[test] - fn pgm_ascii() { - // The data contains two rows of the image (each line is padded to the full byte). For - // comments on its format, see documentation of `impl SampleType for PbmBit`. - let pbmbinary = b"P2 4 4 255\n 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15"; - let decoder = PnmDecoder::new(&pbmbinary[..]).unwrap(); - assert_eq!(decoder.color_type(), ColorType::L8); - assert_eq!(decoder.dimensions(), (4, 4)); - assert_eq!( - decoder.subtype(), - PnmSubtype::Graymap(SampleEncoding::Ascii) - ); - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut image).unwrap(); - assert_eq!(image, (0..16).collect::<Vec<_>>()); - match PnmDecoder::new(&pbmbinary[..]).unwrap().into_inner() { - ( - _, - PnmHeader { - decoded: - HeaderRecord::Graymap(GraymapHeader { - encoding: SampleEncoding::Ascii, - width: 4, - height: 4, - maxwhite: 255, - }), - encoded: _, - }, - ) => (), - _ => panic!("Decoded header is incorrect"), - } - } - - #[test] - fn dimension_overflow() { - let pamdata = b"P7 -# Comment line -MAXVAL 255 -TUPLTYPE RGB -DEPTH 3 -WIDTH 4294967295 -HEIGHT 4294967295 -ENDHDR -\xde\xad\xbe\xef\xde\xad\xbe\xef\xde\xad\xbe\xef"; - - assert!(PnmDecoder::new(&pamdata[..]).is_err()); - } - - #[test] - fn issue_1508() { - let _ = crate::load_from_memory(b"P391919 16999 1 1 9 919 16999 1 9999 999* 99999 N"); - } - - #[test] - fn issue_1616_overflow() { - let data = vec![ - 80, 54, 10, 52, 50, 57, 52, 56, 50, 57, 52, 56, 35, 56, 10, 52, 10, 48, 10, 12, 12, 56, - ]; - // Validate: we have a header. Note: we might already calculate that this will fail but - // then we could not return information about the header to the caller. - let decoder = PnmDecoder::new(&data[..]).unwrap(); - let mut image = vec![0; decoder.total_bytes() as usize]; - let _ = decoder.read_image(&mut image); - } -} diff --git a/vendor/image/src/codecs/pnm/encoder.rs b/vendor/image/src/codecs/pnm/encoder.rs deleted file mode 100644 index 9f823d0..0000000 --- a/vendor/image/src/codecs/pnm/encoder.rs +++ /dev/null @@ -1,673 +0,0 @@ -//! Encoding of PNM Images -use std::fmt; -use std::io; - -use std::io::Write; - -use super::AutoBreak; -use super::{ArbitraryHeader, ArbitraryTuplType, BitmapHeader, GraymapHeader, PixmapHeader}; -use super::{HeaderRecord, PnmHeader, PnmSubtype, SampleEncoding}; -use crate::color::{ColorType, ExtendedColorType}; -use crate::error::{ - ImageError, ImageResult, ParameterError, ParameterErrorKind, UnsupportedError, - UnsupportedErrorKind, -}; -use crate::image::{ImageEncoder, ImageFormat}; - -use byteorder::{BigEndian, WriteBytesExt}; - -enum HeaderStrategy { - Dynamic, - Subtype(PnmSubtype), - Chosen(PnmHeader), -} - -#[derive(Clone, Copy)] -pub enum FlatSamples<'a> { - U8(&'a [u8]), - U16(&'a [u16]), -} - -/// Encodes images to any of the `pnm` image formats. -pub struct PnmEncoder<W: Write> { - writer: W, - header: HeaderStrategy, -} - -/// Encapsulate the checking system in the type system. Non of the fields are actually accessed -/// but requiring them forces us to validly construct the struct anyways. -struct CheckedImageBuffer<'a> { - _image: FlatSamples<'a>, - _width: u32, - _height: u32, - _color: ExtendedColorType, -} - -// Check the header against the buffer. Each struct produces the next after a check. -struct UncheckedHeader<'a> { - header: &'a PnmHeader, -} - -struct CheckedDimensions<'a> { - unchecked: UncheckedHeader<'a>, - width: u32, - height: u32, -} - -struct CheckedHeaderColor<'a> { - dimensions: CheckedDimensions<'a>, - color: ExtendedColorType, -} - -struct CheckedHeader<'a> { - color: CheckedHeaderColor<'a>, - encoding: TupleEncoding<'a>, - _image: CheckedImageBuffer<'a>, -} - -enum TupleEncoding<'a> { - PbmBits { - samples: FlatSamples<'a>, - width: u32, - }, - Ascii { - samples: FlatSamples<'a>, - }, - Bytes { - samples: FlatSamples<'a>, - }, -} - -impl<W: Write> PnmEncoder<W> { - /// Create new PnmEncoder from the `writer`. - /// - /// The encoded images will have some `pnm` format. If more control over the image type is - /// required, use either one of `with_subtype` or `with_header`. For more information on the - /// behaviour, see `with_dynamic_header`. - pub fn new(writer: W) -> Self { - PnmEncoder { - writer, - header: HeaderStrategy::Dynamic, - } - } - - /// Encode a specific pnm subtype image. - /// - /// The magic number and encoding type will be chosen as provided while the rest of the header - /// data will be generated dynamically. Trying to encode incompatible images (e.g. encoding an - /// RGB image as Graymap) will result in an error. - /// - /// This will overwrite the effect of earlier calls to `with_header` and `with_dynamic_header`. - pub fn with_subtype(self, subtype: PnmSubtype) -> Self { - PnmEncoder { - writer: self.writer, - header: HeaderStrategy::Subtype(subtype), - } - } - - /// Enforce the use of a chosen header. - /// - /// While this option gives the most control over the actual written data, the encoding process - /// will error in case the header data and image parameters do not agree. It is the users - /// obligation to ensure that the width and height are set accordingly, for example. - /// - /// Choose this option if you want a lossless decoding/encoding round trip. - /// - /// This will overwrite the effect of earlier calls to `with_subtype` and `with_dynamic_header`. - pub fn with_header(self, header: PnmHeader) -> Self { - PnmEncoder { - writer: self.writer, - header: HeaderStrategy::Chosen(header), - } - } - - /// Create the header dynamically for each image. - /// - /// This is the default option upon creation of the encoder. With this, most images should be - /// encodable but the specific format chosen is out of the users control. The pnm subtype is - /// chosen arbitrarily by the library. - /// - /// This will overwrite the effect of earlier calls to `with_subtype` and `with_header`. - pub fn with_dynamic_header(self) -> Self { - PnmEncoder { - writer: self.writer, - header: HeaderStrategy::Dynamic, - } - } - - /// Encode an image whose samples are represented as `u8`. - /// - /// Some `pnm` subtypes are incompatible with some color options, a chosen header most - /// certainly with any deviation from the original decoded image. - pub fn encode<'s, S>( - &mut self, - image: S, - width: u32, - height: u32, - color: ColorType, - ) -> ImageResult<()> - where - S: Into<FlatSamples<'s>>, - { - let image = image.into(); - match self.header { - HeaderStrategy::Dynamic => { - self.write_dynamic_header(image, width, height, color.into()) - } - HeaderStrategy::Subtype(subtype) => { - self.write_subtyped_header(subtype, image, width, height, color.into()) - } - HeaderStrategy::Chosen(ref header) => Self::write_with_header( - &mut self.writer, - header, - image, - width, - height, - color.into(), - ), - } - } - - /// Choose any valid pnm format that the image can be expressed in and write its header. - /// - /// Returns how the body should be written if successful. - fn write_dynamic_header( - &mut self, - image: FlatSamples, - width: u32, - height: u32, - color: ExtendedColorType, - ) -> ImageResult<()> { - let depth = u32::from(color.channel_count()); - let (maxval, tupltype) = match color { - ExtendedColorType::L1 => (1, ArbitraryTuplType::BlackAndWhite), - ExtendedColorType::L8 => (0xff, ArbitraryTuplType::Grayscale), - ExtendedColorType::L16 => (0xffff, ArbitraryTuplType::Grayscale), - ExtendedColorType::La1 => (1, ArbitraryTuplType::BlackAndWhiteAlpha), - ExtendedColorType::La8 => (0xff, ArbitraryTuplType::GrayscaleAlpha), - ExtendedColorType::La16 => (0xffff, ArbitraryTuplType::GrayscaleAlpha), - ExtendedColorType::Rgb8 => (0xff, ArbitraryTuplType::RGB), - ExtendedColorType::Rgb16 => (0xffff, ArbitraryTuplType::RGB), - ExtendedColorType::Rgba8 => (0xff, ArbitraryTuplType::RGBAlpha), - ExtendedColorType::Rgba16 => (0xffff, ArbitraryTuplType::RGBAlpha), - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::Color(color), - ), - )) - } - }; - - let header = PnmHeader { - decoded: HeaderRecord::Arbitrary(ArbitraryHeader { - width, - height, - depth, - maxval, - tupltype: Some(tupltype), - }), - encoded: None, - }; - - Self::write_with_header(&mut self.writer, &header, image, width, height, color) - } - - /// Try to encode the image with the chosen format, give its corresponding pixel encoding type. - fn write_subtyped_header( - &mut self, - subtype: PnmSubtype, - image: FlatSamples, - width: u32, - height: u32, - color: ExtendedColorType, - ) -> ImageResult<()> { - let header = match (subtype, color) { - (PnmSubtype::ArbitraryMap, color) => { - return self.write_dynamic_header(image, width, height, color) - } - (PnmSubtype::Pixmap(encoding), ExtendedColorType::Rgb8) => PnmHeader { - decoded: HeaderRecord::Pixmap(PixmapHeader { - encoding, - width, - height, - maxval: 255, - }), - encoded: None, - }, - (PnmSubtype::Graymap(encoding), ExtendedColorType::L8) => PnmHeader { - decoded: HeaderRecord::Graymap(GraymapHeader { - encoding, - width, - height, - maxwhite: 255, - }), - encoded: None, - }, - (PnmSubtype::Bitmap(encoding), ExtendedColorType::L8) - | (PnmSubtype::Bitmap(encoding), ExtendedColorType::L1) => PnmHeader { - decoded: HeaderRecord::Bitmap(BitmapHeader { - encoding, - width, - height, - }), - encoded: None, - }, - (_, _) => { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic( - "Color type can not be represented in the chosen format".to_owned(), - ), - ))); - } - }; - - Self::write_with_header(&mut self.writer, &header, image, width, height, color) - } - - /// Try to encode the image with the chosen header, checking if values are correct. - /// - /// Returns how the body should be written if successful. - fn write_with_header( - writer: &mut dyn Write, - header: &PnmHeader, - image: FlatSamples, - width: u32, - height: u32, - color: ExtendedColorType, - ) -> ImageResult<()> { - let unchecked = UncheckedHeader { header }; - - unchecked - .check_header_dimensions(width, height)? - .check_header_color(color)? - .check_sample_values(image)? - .write_header(writer)? - .write_image(writer) - } -} - -impl<W: Write> ImageEncoder for PnmEncoder<W> { - fn write_image( - mut self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - self.encode(buf, width, height, color_type) - } -} - -impl<'a> CheckedImageBuffer<'a> { - fn check( - image: FlatSamples<'a>, - width: u32, - height: u32, - color: ExtendedColorType, - ) -> ImageResult<CheckedImageBuffer<'a>> { - let components = color.channel_count() as usize; - let uwidth = width as usize; - let uheight = height as usize; - let expected_len = components - .checked_mul(uwidth) - .and_then(|v| v.checked_mul(uheight)); - if Some(image.len()) != expected_len { - // Image buffer does not correspond to size and colour. - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))); - } - Ok(CheckedImageBuffer { - _image: image, - _width: width, - _height: height, - _color: color, - }) - } -} - -impl<'a> UncheckedHeader<'a> { - fn check_header_dimensions( - self, - width: u32, - height: u32, - ) -> ImageResult<CheckedDimensions<'a>> { - if self.header.width() != width || self.header.height() != height { - // Chosen header does not match Image dimensions. - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))); - } - - Ok(CheckedDimensions { - unchecked: self, - width, - height, - }) - } -} - -impl<'a> CheckedDimensions<'a> { - // Check color compatibility with the header. This will only error when we are certain that - // the combination is bogus (e.g. combining Pixmap and Palette) but allows uncertain - // combinations (basically a ArbitraryTuplType::Custom with any color of fitting depth). - fn check_header_color(self, color: ExtendedColorType) -> ImageResult<CheckedHeaderColor<'a>> { - let components = u32::from(color.channel_count()); - - match *self.unchecked.header { - PnmHeader { - decoded: HeaderRecord::Bitmap(_), - .. - } => match color { - ExtendedColorType::L1 | ExtendedColorType::L8 | ExtendedColorType::L16 => (), - _ => { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic( - "PBM format only support luma color types".to_owned(), - ), - ))) - } - }, - PnmHeader { - decoded: HeaderRecord::Graymap(_), - .. - } => match color { - ExtendedColorType::L1 | ExtendedColorType::L8 | ExtendedColorType::L16 => (), - _ => { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic( - "PGM format only support luma color types".to_owned(), - ), - ))) - } - }, - PnmHeader { - decoded: HeaderRecord::Pixmap(_), - .. - } => match color { - ExtendedColorType::Rgb8 => (), - _ => { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic( - "PPM format only support ExtendedColorType::Rgb8".to_owned(), - ), - ))) - } - }, - PnmHeader { - decoded: - HeaderRecord::Arbitrary(ArbitraryHeader { - depth, - ref tupltype, - .. - }), - .. - } => match (tupltype, color) { - (&Some(ArbitraryTuplType::BlackAndWhite), ExtendedColorType::L1) => (), - (&Some(ArbitraryTuplType::BlackAndWhiteAlpha), ExtendedColorType::La8) => (), - - (&Some(ArbitraryTuplType::Grayscale), ExtendedColorType::L1) => (), - (&Some(ArbitraryTuplType::Grayscale), ExtendedColorType::L8) => (), - (&Some(ArbitraryTuplType::Grayscale), ExtendedColorType::L16) => (), - (&Some(ArbitraryTuplType::GrayscaleAlpha), ExtendedColorType::La8) => (), - - (&Some(ArbitraryTuplType::RGB), ExtendedColorType::Rgb8) => (), - (&Some(ArbitraryTuplType::RGBAlpha), ExtendedColorType::Rgba8) => (), - - (&None, _) if depth == components => (), - (&Some(ArbitraryTuplType::Custom(_)), _) if depth == components => (), - _ if depth != components => { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic(format!( - "Depth mismatch: header {} vs. color {}", - depth, components - )), - ))) - } - _ => { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic( - "Invalid color type for selected PAM color type".to_owned(), - ), - ))) - } - }, - } - - Ok(CheckedHeaderColor { - dimensions: self, - color, - }) - } -} - -impl<'a> CheckedHeaderColor<'a> { - fn check_sample_values(self, image: FlatSamples<'a>) -> ImageResult<CheckedHeader<'a>> { - let header_maxval = match self.dimensions.unchecked.header.decoded { - HeaderRecord::Bitmap(_) => 1, - HeaderRecord::Graymap(GraymapHeader { maxwhite, .. }) => maxwhite, - HeaderRecord::Pixmap(PixmapHeader { maxval, .. }) => maxval, - HeaderRecord::Arbitrary(ArbitraryHeader { maxval, .. }) => maxval, - }; - - // We trust the image color bit count to be correct at least. - let max_sample = match self.color { - ExtendedColorType::Unknown(n) if n <= 16 => (1 << n) - 1, - ExtendedColorType::L1 => 1, - ExtendedColorType::L8 - | ExtendedColorType::La8 - | ExtendedColorType::Rgb8 - | ExtendedColorType::Rgba8 - | ExtendedColorType::Bgr8 - | ExtendedColorType::Bgra8 => 0xff, - ExtendedColorType::L16 - | ExtendedColorType::La16 - | ExtendedColorType::Rgb16 - | ExtendedColorType::Rgba16 => 0xffff, - _ => { - // Unsupported target color type. - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::Color(self.color), - ), - )); - } - }; - - // Avoid the performance heavy check if possible, e.g. if the header has been chosen by us. - if header_maxval < max_sample && !image.all_smaller(header_maxval) { - // Sample value greater than allowed for chosen header. - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Pnm.into(), - UnsupportedErrorKind::GenericFeature( - "Sample value greater than allowed for chosen header".to_owned(), - ), - ), - )); - } - - let encoding = image.encoding_for(&self.dimensions.unchecked.header.decoded); - - let image = CheckedImageBuffer::check( - image, - self.dimensions.width, - self.dimensions.height, - self.color, - )?; - - Ok(CheckedHeader { - color: self, - encoding, - _image: image, - }) - } -} - -impl<'a> CheckedHeader<'a> { - fn write_header(self, writer: &mut dyn Write) -> ImageResult<TupleEncoding<'a>> { - self.header().write(writer)?; - Ok(self.encoding) - } - - fn header(&self) -> &PnmHeader { - self.color.dimensions.unchecked.header - } -} - -struct SampleWriter<'a>(&'a mut dyn Write); - -impl<'a> SampleWriter<'a> { - fn write_samples_ascii<V>(self, samples: V) -> io::Result<()> - where - V: Iterator, - V::Item: fmt::Display, - { - let mut auto_break_writer = AutoBreak::new(self.0, 70); - for value in samples { - write!(auto_break_writer, "{} ", value)?; - } - auto_break_writer.flush() - } - - fn write_pbm_bits<V>(self, samples: &[V], width: u32) -> io::Result<()> - /* Default gives 0 for all primitives. TODO: replace this with `Zeroable` once it hits stable */ - where - V: Default + Eq + Copy, - { - // The length of an encoded scanline - let line_width = (width - 1) / 8 + 1; - - // We'll be writing single bytes, so buffer - let mut line_buffer = Vec::with_capacity(line_width as usize); - - for line in samples.chunks(width as usize) { - for byte_bits in line.chunks(8) { - let mut byte = 0u8; - for i in 0..8 { - // Black pixels are encoded as 1s - if let Some(&v) = byte_bits.get(i) { - if v == V::default() { - byte |= 1u8 << (7 - i) - } - } - } - line_buffer.push(byte) - } - self.0.write_all(line_buffer.as_slice())?; - line_buffer.clear(); - } - - self.0.flush() - } -} - -impl<'a> FlatSamples<'a> { - fn len(&self) -> usize { - match *self { - FlatSamples::U8(arr) => arr.len(), - FlatSamples::U16(arr) => arr.len(), - } - } - - fn all_smaller(&self, max_val: u32) -> bool { - match *self { - FlatSamples::U8(arr) => arr.iter().any(|&val| u32::from(val) > max_val), - FlatSamples::U16(arr) => arr.iter().any(|&val| u32::from(val) > max_val), - } - } - - fn encoding_for(&self, header: &HeaderRecord) -> TupleEncoding<'a> { - match *header { - HeaderRecord::Bitmap(BitmapHeader { - encoding: SampleEncoding::Binary, - width, - .. - }) => TupleEncoding::PbmBits { - samples: *self, - width, - }, - - HeaderRecord::Bitmap(BitmapHeader { - encoding: SampleEncoding::Ascii, - .. - }) => TupleEncoding::Ascii { samples: *self }, - - HeaderRecord::Arbitrary(_) => TupleEncoding::Bytes { samples: *self }, - - HeaderRecord::Graymap(GraymapHeader { - encoding: SampleEncoding::Ascii, - .. - }) - | HeaderRecord::Pixmap(PixmapHeader { - encoding: SampleEncoding::Ascii, - .. - }) => TupleEncoding::Ascii { samples: *self }, - - HeaderRecord::Graymap(GraymapHeader { - encoding: SampleEncoding::Binary, - .. - }) - | HeaderRecord::Pixmap(PixmapHeader { - encoding: SampleEncoding::Binary, - .. - }) => TupleEncoding::Bytes { samples: *self }, - } - } -} - -impl<'a> From<&'a [u8]> for FlatSamples<'a> { - fn from(samples: &'a [u8]) -> Self { - FlatSamples::U8(samples) - } -} - -impl<'a> From<&'a [u16]> for FlatSamples<'a> { - fn from(samples: &'a [u16]) -> Self { - FlatSamples::U16(samples) - } -} - -impl<'a> TupleEncoding<'a> { - fn write_image(&self, writer: &mut dyn Write) -> ImageResult<()> { - match *self { - TupleEncoding::PbmBits { - samples: FlatSamples::U8(samples), - width, - } => SampleWriter(writer) - .write_pbm_bits(samples, width) - .map_err(ImageError::IoError), - TupleEncoding::PbmBits { - samples: FlatSamples::U16(samples), - width, - } => SampleWriter(writer) - .write_pbm_bits(samples, width) - .map_err(ImageError::IoError), - - TupleEncoding::Bytes { - samples: FlatSamples::U8(samples), - } => writer.write_all(samples).map_err(ImageError::IoError), - TupleEncoding::Bytes { - samples: FlatSamples::U16(samples), - } => samples.iter().try_for_each(|&sample| { - writer - .write_u16::<BigEndian>(sample) - .map_err(ImageError::IoError) - }), - - TupleEncoding::Ascii { - samples: FlatSamples::U8(samples), - } => SampleWriter(writer) - .write_samples_ascii(samples.iter()) - .map_err(ImageError::IoError), - TupleEncoding::Ascii { - samples: FlatSamples::U16(samples), - } => SampleWriter(writer) - .write_samples_ascii(samples.iter()) - .map_err(ImageError::IoError), - } - } -} diff --git a/vendor/image/src/codecs/pnm/header.rs b/vendor/image/src/codecs/pnm/header.rs deleted file mode 100644 index 443a701..0000000 --- a/vendor/image/src/codecs/pnm/header.rs +++ /dev/null @@ -1,354 +0,0 @@ -use std::{fmt, io}; - -/// The kind of encoding used to store sample values -#[derive(Clone, Copy, PartialEq, Eq, Debug)] -pub enum SampleEncoding { - /// Samples are unsigned binary integers in big endian - Binary, - - /// Samples are encoded as decimal ascii strings separated by whitespace - Ascii, -} - -/// Denotes the category of the magic number -#[derive(Clone, Copy, PartialEq, Eq, Debug)] -pub enum PnmSubtype { - /// Magic numbers P1 and P4 - Bitmap(SampleEncoding), - - /// Magic numbers P2 and P5 - Graymap(SampleEncoding), - - /// Magic numbers P3 and P6 - Pixmap(SampleEncoding), - - /// Magic number P7 - ArbitraryMap, -} - -/// Stores the complete header data of a file. -/// -/// Internally, provides mechanisms for lossless reencoding. After reading a file with the decoder -/// it is possible to recover the header and construct an encoder. Using the encoder on the just -/// loaded image should result in a byte copy of the original file (for single image pnms without -/// additional trailing data). -pub struct PnmHeader { - pub(crate) decoded: HeaderRecord, - pub(crate) encoded: Option<Vec<u8>>, -} - -pub(crate) enum HeaderRecord { - Bitmap(BitmapHeader), - Graymap(GraymapHeader), - Pixmap(PixmapHeader), - Arbitrary(ArbitraryHeader), -} - -/// Header produced by a `pbm` file ("Portable Bit Map") -#[derive(Clone, Copy, Debug)] -pub struct BitmapHeader { - /// Binary or Ascii encoded file - pub encoding: SampleEncoding, - - /// Height of the image file - pub height: u32, - - /// Width of the image file - pub width: u32, -} - -/// Header produced by a `pgm` file ("Portable Gray Map") -#[derive(Clone, Copy, Debug)] -pub struct GraymapHeader { - /// Binary or Ascii encoded file - pub encoding: SampleEncoding, - - /// Height of the image file - pub height: u32, - - /// Width of the image file - pub width: u32, - - /// Maximum sample value within the image - pub maxwhite: u32, -} - -/// Header produced by a `ppm` file ("Portable Pixel Map") -#[derive(Clone, Copy, Debug)] -pub struct PixmapHeader { - /// Binary or Ascii encoded file - pub encoding: SampleEncoding, - - /// Height of the image file - pub height: u32, - - /// Width of the image file - pub width: u32, - - /// Maximum sample value within the image - pub maxval: u32, -} - -/// Header produced by a `pam` file ("Portable Arbitrary Map") -#[derive(Clone, Debug)] -pub struct ArbitraryHeader { - /// Height of the image file - pub height: u32, - - /// Width of the image file - pub width: u32, - - /// Number of color channels - pub depth: u32, - - /// Maximum sample value within the image - pub maxval: u32, - - /// Color interpretation of image pixels - pub tupltype: Option<ArbitraryTuplType>, -} - -/// Standardized tuple type specifiers in the header of a `pam`. -#[derive(Clone, Debug)] -pub enum ArbitraryTuplType { - /// Pixels are either black (0) or white (1) - BlackAndWhite, - - /// Pixels are either black (0) or white (1) and a second alpha channel - BlackAndWhiteAlpha, - - /// Pixels represent the amount of white - Grayscale, - - /// Grayscale with an additional alpha channel - GrayscaleAlpha, - - /// Three channels: Red, Green, Blue - RGB, - - /// Four channels: Red, Green, Blue, Alpha - RGBAlpha, - - /// An image format which is not standardized - Custom(String), -} - -impl ArbitraryTuplType { - pub(crate) fn name(&self) -> &str { - match self { - ArbitraryTuplType::BlackAndWhite => "BLACKANDWHITE", - ArbitraryTuplType::BlackAndWhiteAlpha => "BLACKANDWHITE_ALPHA", - ArbitraryTuplType::Grayscale => "GRAYSCALE", - ArbitraryTuplType::GrayscaleAlpha => "GRAYSCALE_ALPHA", - ArbitraryTuplType::RGB => "RGB", - ArbitraryTuplType::RGBAlpha => "RGB_ALPHA", - ArbitraryTuplType::Custom(custom) => custom, - } - } -} - -impl PnmSubtype { - /// Get the two magic constant bytes corresponding to this format subtype. - pub fn magic_constant(self) -> &'static [u8; 2] { - match self { - PnmSubtype::Bitmap(SampleEncoding::Ascii) => b"P1", - PnmSubtype::Graymap(SampleEncoding::Ascii) => b"P2", - PnmSubtype::Pixmap(SampleEncoding::Ascii) => b"P3", - PnmSubtype::Bitmap(SampleEncoding::Binary) => b"P4", - PnmSubtype::Graymap(SampleEncoding::Binary) => b"P5", - PnmSubtype::Pixmap(SampleEncoding::Binary) => b"P6", - PnmSubtype::ArbitraryMap => b"P7", - } - } - - /// Whether samples are stored as binary or as decimal ascii - pub fn sample_encoding(self) -> SampleEncoding { - match self { - PnmSubtype::ArbitraryMap => SampleEncoding::Binary, - PnmSubtype::Bitmap(enc) => enc, - PnmSubtype::Graymap(enc) => enc, - PnmSubtype::Pixmap(enc) => enc, - } - } -} - -impl PnmHeader { - /// Retrieve the format subtype from which the header was created. - pub fn subtype(&self) -> PnmSubtype { - match self.decoded { - HeaderRecord::Bitmap(BitmapHeader { encoding, .. }) => PnmSubtype::Bitmap(encoding), - HeaderRecord::Graymap(GraymapHeader { encoding, .. }) => PnmSubtype::Graymap(encoding), - HeaderRecord::Pixmap(PixmapHeader { encoding, .. }) => PnmSubtype::Pixmap(encoding), - HeaderRecord::Arbitrary(ArbitraryHeader { .. }) => PnmSubtype::ArbitraryMap, - } - } - - /// The width of the image this header is for. - pub fn width(&self) -> u32 { - match self.decoded { - HeaderRecord::Bitmap(BitmapHeader { width, .. }) => width, - HeaderRecord::Graymap(GraymapHeader { width, .. }) => width, - HeaderRecord::Pixmap(PixmapHeader { width, .. }) => width, - HeaderRecord::Arbitrary(ArbitraryHeader { width, .. }) => width, - } - } - - /// The height of the image this header is for. - pub fn height(&self) -> u32 { - match self.decoded { - HeaderRecord::Bitmap(BitmapHeader { height, .. }) => height, - HeaderRecord::Graymap(GraymapHeader { height, .. }) => height, - HeaderRecord::Pixmap(PixmapHeader { height, .. }) => height, - HeaderRecord::Arbitrary(ArbitraryHeader { height, .. }) => height, - } - } - - /// The biggest value a sample can have. In other words, the colour resolution. - pub fn maximal_sample(&self) -> u32 { - match self.decoded { - HeaderRecord::Bitmap(BitmapHeader { .. }) => 1, - HeaderRecord::Graymap(GraymapHeader { maxwhite, .. }) => maxwhite, - HeaderRecord::Pixmap(PixmapHeader { maxval, .. }) => maxval, - HeaderRecord::Arbitrary(ArbitraryHeader { maxval, .. }) => maxval, - } - } - - /// Retrieve the underlying bitmap header if any - pub fn as_bitmap(&self) -> Option<&BitmapHeader> { - match self.decoded { - HeaderRecord::Bitmap(ref bitmap) => Some(bitmap), - _ => None, - } - } - - /// Retrieve the underlying graymap header if any - pub fn as_graymap(&self) -> Option<&GraymapHeader> { - match self.decoded { - HeaderRecord::Graymap(ref graymap) => Some(graymap), - _ => None, - } - } - - /// Retrieve the underlying pixmap header if any - pub fn as_pixmap(&self) -> Option<&PixmapHeader> { - match self.decoded { - HeaderRecord::Pixmap(ref pixmap) => Some(pixmap), - _ => None, - } - } - - /// Retrieve the underlying arbitrary header if any - pub fn as_arbitrary(&self) -> Option<&ArbitraryHeader> { - match self.decoded { - HeaderRecord::Arbitrary(ref arbitrary) => Some(arbitrary), - _ => None, - } - } - - /// Write the header back into a binary stream - pub fn write(&self, writer: &mut dyn io::Write) -> io::Result<()> { - writer.write_all(self.subtype().magic_constant())?; - match *self { - PnmHeader { - encoded: Some(ref content), - .. - } => writer.write_all(content), - PnmHeader { - decoded: - HeaderRecord::Bitmap(BitmapHeader { - encoding: _encoding, - width, - height, - }), - .. - } => writeln!(writer, "\n{} {}", width, height), - PnmHeader { - decoded: - HeaderRecord::Graymap(GraymapHeader { - encoding: _encoding, - width, - height, - maxwhite, - }), - .. - } => writeln!(writer, "\n{} {} {}", width, height, maxwhite), - PnmHeader { - decoded: - HeaderRecord::Pixmap(PixmapHeader { - encoding: _encoding, - width, - height, - maxval, - }), - .. - } => writeln!(writer, "\n{} {} {}", width, height, maxval), - PnmHeader { - decoded: - HeaderRecord::Arbitrary(ArbitraryHeader { - width, - height, - depth, - maxval, - ref tupltype, - }), - .. - } => { - struct TupltypeWriter<'a>(&'a Option<ArbitraryTuplType>); - impl<'a> fmt::Display for TupltypeWriter<'a> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self.0 { - Some(tt) => writeln!(f, "TUPLTYPE {}", tt.name()), - None => Ok(()), - } - } - } - - writeln!( - writer, - "\nWIDTH {}\nHEIGHT {}\nDEPTH {}\nMAXVAL {}\n{}ENDHDR", - width, - height, - depth, - maxval, - TupltypeWriter(tupltype) - ) - } - } - } -} - -impl From<BitmapHeader> for PnmHeader { - fn from(header: BitmapHeader) -> Self { - PnmHeader { - decoded: HeaderRecord::Bitmap(header), - encoded: None, - } - } -} - -impl From<GraymapHeader> for PnmHeader { - fn from(header: GraymapHeader) -> Self { - PnmHeader { - decoded: HeaderRecord::Graymap(header), - encoded: None, - } - } -} - -impl From<PixmapHeader> for PnmHeader { - fn from(header: PixmapHeader) -> Self { - PnmHeader { - decoded: HeaderRecord::Pixmap(header), - encoded: None, - } - } -} - -impl From<ArbitraryHeader> for PnmHeader { - fn from(header: ArbitraryHeader) -> Self { - PnmHeader { - decoded: HeaderRecord::Arbitrary(header), - encoded: None, - } - } -} diff --git a/vendor/image/src/codecs/pnm/mod.rs b/vendor/image/src/codecs/pnm/mod.rs deleted file mode 100644 index de8612d..0000000 --- a/vendor/image/src/codecs/pnm/mod.rs +++ /dev/null @@ -1,184 +0,0 @@ -//! Decoding of netpbm image formats (pbm, pgm, ppm and pam). -//! -//! The formats pbm, pgm and ppm are fully supported. The pam decoder recognizes the tuple types -//! `BLACKANDWHITE`, `GRAYSCALE` and `RGB` and explicitly recognizes but rejects their `_ALPHA` -//! variants for now as alpha color types are unsupported. -use self::autobreak::AutoBreak; -pub use self::decoder::PnmDecoder; -pub use self::encoder::PnmEncoder; -use self::header::HeaderRecord; -pub use self::header::{ - ArbitraryHeader, ArbitraryTuplType, BitmapHeader, GraymapHeader, PixmapHeader, -}; -pub use self::header::{PnmHeader, PnmSubtype, SampleEncoding}; - -mod autobreak; -mod decoder; -mod encoder; -mod header; - -#[cfg(test)] -mod tests { - use super::*; - use crate::color::ColorType; - use crate::image::ImageDecoder; - use byteorder::{ByteOrder, NativeEndian}; - - fn execute_roundtrip_default(buffer: &[u8], width: u32, height: u32, color: ColorType) { - let mut encoded_buffer = Vec::new(); - - { - let mut encoder = PnmEncoder::new(&mut encoded_buffer); - encoder - .encode(buffer, width, height, color) - .expect("Failed to encode the image buffer"); - } - - let (header, loaded_color, loaded_image) = { - let decoder = PnmDecoder::new(&encoded_buffer[..]).unwrap(); - let color_type = decoder.color_type(); - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder - .read_image(&mut image) - .expect("Failed to decode the image"); - let (_, header) = PnmDecoder::new(&encoded_buffer[..]).unwrap().into_inner(); - (header, color_type, image) - }; - - assert_eq!(header.width(), width); - assert_eq!(header.height(), height); - assert_eq!(loaded_color, color); - assert_eq!(loaded_image.as_slice(), buffer); - } - - fn execute_roundtrip_with_subtype( - buffer: &[u8], - width: u32, - height: u32, - color: ColorType, - subtype: PnmSubtype, - ) { - let mut encoded_buffer = Vec::new(); - - { - let mut encoder = PnmEncoder::new(&mut encoded_buffer).with_subtype(subtype); - encoder - .encode(buffer, width, height, color) - .expect("Failed to encode the image buffer"); - } - - let (header, loaded_color, loaded_image) = { - let decoder = PnmDecoder::new(&encoded_buffer[..]).unwrap(); - let color_type = decoder.color_type(); - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder - .read_image(&mut image) - .expect("Failed to decode the image"); - let (_, header) = PnmDecoder::new(&encoded_buffer[..]).unwrap().into_inner(); - (header, color_type, image) - }; - - assert_eq!(header.width(), width); - assert_eq!(header.height(), height); - assert_eq!(header.subtype(), subtype); - assert_eq!(loaded_color, color); - assert_eq!(loaded_image.as_slice(), buffer); - } - - fn execute_roundtrip_u16(buffer: &[u16], width: u32, height: u32, color: ColorType) { - let mut encoded_buffer = Vec::new(); - - { - let mut encoder = PnmEncoder::new(&mut encoded_buffer); - encoder - .encode(buffer, width, height, color) - .expect("Failed to encode the image buffer"); - } - - let (header, loaded_color, loaded_image) = { - let decoder = PnmDecoder::new(&encoded_buffer[..]).unwrap(); - let color_type = decoder.color_type(); - let mut image = vec![0; decoder.total_bytes() as usize]; - decoder - .read_image(&mut image) - .expect("Failed to decode the image"); - let (_, header) = PnmDecoder::new(&encoded_buffer[..]).unwrap().into_inner(); - (header, color_type, image) - }; - - let mut buffer_u8 = vec![0; buffer.len() * 2]; - NativeEndian::write_u16_into(buffer, &mut buffer_u8[..]); - - assert_eq!(header.width(), width); - assert_eq!(header.height(), height); - assert_eq!(loaded_color, color); - assert_eq!(loaded_image, buffer_u8); - } - - #[test] - fn roundtrip_gray() { - #[rustfmt::skip] - let buf: [u8; 16] = [ - 0, 0, 0, 255, - 255, 255, 255, 255, - 255, 0, 255, 0, - 255, 0, 0, 0, - ]; - - execute_roundtrip_default(&buf, 4, 4, ColorType::L8); - execute_roundtrip_with_subtype(&buf, 4, 4, ColorType::L8, PnmSubtype::ArbitraryMap); - execute_roundtrip_with_subtype( - &buf, - 4, - 4, - ColorType::L8, - PnmSubtype::Graymap(SampleEncoding::Ascii), - ); - execute_roundtrip_with_subtype( - &buf, - 4, - 4, - ColorType::L8, - PnmSubtype::Graymap(SampleEncoding::Binary), - ); - } - - #[test] - fn roundtrip_rgb() { - #[rustfmt::skip] - let buf: [u8; 27] = [ - 0, 0, 0, - 0, 0, 255, - 0, 255, 0, - 0, 255, 255, - 255, 0, 0, - 255, 0, 255, - 255, 255, 0, - 255, 255, 255, - 255, 255, 255, - ]; - execute_roundtrip_default(&buf, 3, 3, ColorType::Rgb8); - execute_roundtrip_with_subtype(&buf, 3, 3, ColorType::Rgb8, PnmSubtype::ArbitraryMap); - execute_roundtrip_with_subtype( - &buf, - 3, - 3, - ColorType::Rgb8, - PnmSubtype::Pixmap(SampleEncoding::Binary), - ); - execute_roundtrip_with_subtype( - &buf, - 3, - 3, - ColorType::Rgb8, - PnmSubtype::Pixmap(SampleEncoding::Ascii), - ); - } - - #[test] - fn roundtrip_u16() { - let buf: [u16; 6] = [0, 1, 0xFFFF, 0x1234, 0x3412, 0xBEAF]; - - execute_roundtrip_u16(&buf, 6, 1, ColorType::L16); - } -} diff --git a/vendor/image/src/codecs/qoi.rs b/vendor/image/src/codecs/qoi.rs deleted file mode 100644 index 214e99b..0000000 --- a/vendor/image/src/codecs/qoi.rs +++ /dev/null @@ -1,104 +0,0 @@ -//! Decoding and encoding of QOI images - -use crate::{ - error::{DecodingError, EncodingError}, - ColorType, ImageDecoder, ImageEncoder, ImageError, ImageFormat, ImageResult, -}; -use std::io::{Cursor, Read, Write}; - -/// QOI decoder -pub struct QoiDecoder<R> { - decoder: qoi::Decoder<R>, -} - -impl<R> QoiDecoder<R> -where - R: Read, -{ - /// Creates a new decoder that decodes from the stream ```reader``` - pub fn new(reader: R) -> ImageResult<Self> { - let decoder = qoi::Decoder::from_stream(reader).map_err(decoding_error)?; - Ok(Self { decoder }) - } -} - -impl<'a, R: Read + 'a> ImageDecoder<'a> for QoiDecoder<R> { - type Reader = Cursor<Vec<u8>>; - - fn dimensions(&self) -> (u32, u32) { - (self.decoder.header().width, self.decoder.header().height) - } - - fn color_type(&self) -> ColorType { - match self.decoder.header().channels { - qoi::Channels::Rgb => ColorType::Rgb8, - qoi::Channels::Rgba => ColorType::Rgba8, - } - } - - fn into_reader(mut self) -> ImageResult<Self::Reader> { - let buffer = self.decoder.decode_to_vec().map_err(decoding_error)?; - Ok(Cursor::new(buffer)) - } -} - -fn decoding_error(error: qoi::Error) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::Qoi.into(), error)) -} - -fn encoding_error(error: qoi::Error) -> ImageError { - ImageError::Encoding(EncodingError::new(ImageFormat::Qoi.into(), error)) -} - -/// QOI encoder -pub struct QoiEncoder<W> { - writer: W, -} - -impl<W: Write> QoiEncoder<W> { - /// Creates a new encoder that writes its output to ```writer``` - pub fn new(writer: W) -> Self { - Self { writer } - } -} - -impl<W: Write> ImageEncoder for QoiEncoder<W> { - fn write_image( - mut self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - if !matches!(color_type, ColorType::Rgba8 | ColorType::Rgb8) { - return Err(ImageError::Encoding(EncodingError::new( - ImageFormat::Qoi.into(), - format!("unsupported color type {color_type:?}. Supported are Rgba8 and Rgb8."), - ))); - } - - // Encode data in QOI - let data = qoi::encode_to_vec(buf, width, height).map_err(encoding_error)?; - - // Write data to buffer - self.writer.write_all(&data[..])?; - self.writer.flush()?; - - Ok(()) - } -} - -#[cfg(test)] -mod tests { - use super::*; - use std::fs::File; - - #[test] - fn decode_test_image() { - let decoder = QoiDecoder::new(File::open("tests/images/qoi/basic-test.qoi").unwrap()) - .expect("Unable to read QOI file"); - - assert_eq!((5, 5), decoder.dimensions()); - assert_eq!(ColorType::Rgba8, decoder.color_type()); - } -} diff --git a/vendor/image/src/codecs/tga/decoder.rs b/vendor/image/src/codecs/tga/decoder.rs deleted file mode 100644 index 16243ce..0000000 --- a/vendor/image/src/codecs/tga/decoder.rs +++ /dev/null @@ -1,502 +0,0 @@ -use super::header::{Header, ImageType, ALPHA_BIT_MASK, SCREEN_ORIGIN_BIT_MASK}; -use crate::{ - color::{ColorType, ExtendedColorType}, - error::{ - ImageError, ImageResult, LimitError, LimitErrorKind, UnsupportedError, UnsupportedErrorKind, - }, - image::{ImageDecoder, ImageFormat, ImageReadBuffer}, -}; -use byteorder::ReadBytesExt; -use std::{ - convert::TryFrom, - io::{self, Read, Seek}, - mem, -}; - -struct ColorMap { - /// sizes in bytes - start_offset: usize, - entry_size: usize, - bytes: Vec<u8>, -} - -impl ColorMap { - pub(crate) fn from_reader( - r: &mut dyn Read, - start_offset: u16, - num_entries: u16, - bits_per_entry: u8, - ) -> ImageResult<ColorMap> { - let bytes_per_entry = (bits_per_entry as usize + 7) / 8; - - let mut bytes = vec![0; bytes_per_entry * num_entries as usize]; - r.read_exact(&mut bytes)?; - - Ok(ColorMap { - entry_size: bytes_per_entry, - start_offset: start_offset as usize, - bytes, - }) - } - - /// Get one entry from the color map - pub(crate) fn get(&self, index: usize) -> Option<&[u8]> { - let entry = self.start_offset + self.entry_size * index; - self.bytes.get(entry..entry + self.entry_size) - } -} - -/// The representation of a TGA decoder -pub struct TgaDecoder<R> { - r: R, - - width: usize, - height: usize, - bytes_per_pixel: usize, - has_loaded_metadata: bool, - - image_type: ImageType, - color_type: ColorType, - original_color_type: Option<ExtendedColorType>, - - header: Header, - color_map: Option<ColorMap>, - - // Used in read_scanline - line_read: Option<usize>, - line_remain_buff: Vec<u8>, -} - -impl<R: Read + Seek> TgaDecoder<R> { - /// Create a new decoder that decodes from the stream `r` - pub fn new(r: R) -> ImageResult<TgaDecoder<R>> { - let mut decoder = TgaDecoder { - r, - - width: 0, - height: 0, - bytes_per_pixel: 0, - has_loaded_metadata: false, - - image_type: ImageType::Unknown, - color_type: ColorType::L8, - original_color_type: None, - - header: Header::default(), - color_map: None, - - line_read: None, - line_remain_buff: Vec::new(), - }; - decoder.read_metadata()?; - Ok(decoder) - } - - fn read_header(&mut self) -> ImageResult<()> { - self.header = Header::from_reader(&mut self.r)?; - self.image_type = ImageType::new(self.header.image_type); - self.width = self.header.image_width as usize; - self.height = self.header.image_height as usize; - self.bytes_per_pixel = (self.header.pixel_depth as usize + 7) / 8; - Ok(()) - } - - fn read_metadata(&mut self) -> ImageResult<()> { - if !self.has_loaded_metadata { - self.read_header()?; - self.read_image_id()?; - self.read_color_map()?; - self.read_color_information()?; - self.has_loaded_metadata = true; - } - Ok(()) - } - - /// Loads the color information for the decoder - /// - /// To keep things simple, we won't handle bit depths that aren't divisible - /// by 8 and are larger than 32. - fn read_color_information(&mut self) -> ImageResult<()> { - if self.header.pixel_depth % 8 != 0 || self.header.pixel_depth > 32 { - // Bit depth must be divisible by 8, and must be less than or equal - // to 32. - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Tga.into(), - UnsupportedErrorKind::Color(ExtendedColorType::Unknown( - self.header.pixel_depth, - )), - ), - )); - } - - let num_alpha_bits = self.header.image_desc & ALPHA_BIT_MASK; - - let other_channel_bits = if self.header.map_type != 0 { - self.header.map_entry_size - } else { - if num_alpha_bits > self.header.pixel_depth { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Tga.into(), - UnsupportedErrorKind::Color(ExtendedColorType::Unknown( - self.header.pixel_depth, - )), - ), - )); - } - - self.header.pixel_depth - num_alpha_bits - }; - let color = self.image_type.is_color(); - - match (num_alpha_bits, other_channel_bits, color) { - // really, the encoding is BGR and BGRA, this is fixed - // up with `TgaDecoder::reverse_encoding`. - (0, 32, true) => self.color_type = ColorType::Rgba8, - (8, 24, true) => self.color_type = ColorType::Rgba8, - (0, 24, true) => self.color_type = ColorType::Rgb8, - (8, 8, false) => self.color_type = ColorType::La8, - (0, 8, false) => self.color_type = ColorType::L8, - (8, 0, false) => { - // alpha-only image is treated as L8 - self.color_type = ColorType::L8; - self.original_color_type = Some(ExtendedColorType::A8); - } - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Tga.into(), - UnsupportedErrorKind::Color(ExtendedColorType::Unknown( - self.header.pixel_depth, - )), - ), - )) - } - } - Ok(()) - } - - /// Read the image id field - /// - /// We're not interested in this field, so this function skips it if it - /// is present - fn read_image_id(&mut self) -> ImageResult<()> { - self.r - .seek(io::SeekFrom::Current(i64::from(self.header.id_length)))?; - Ok(()) - } - - fn read_color_map(&mut self) -> ImageResult<()> { - if self.header.map_type == 1 { - // FIXME: we could reverse the map entries, which avoids having to reverse all pixels - // in the final output individually. - self.color_map = Some(ColorMap::from_reader( - &mut self.r, - self.header.map_origin, - self.header.map_length, - self.header.map_entry_size, - )?); - } - Ok(()) - } - - /// Expands indices into its mapped color - fn expand_color_map(&self, pixel_data: &[u8]) -> io::Result<Vec<u8>> { - #[inline] - fn bytes_to_index(bytes: &[u8]) -> usize { - let mut result = 0usize; - for byte in bytes.iter() { - result = result << 8 | *byte as usize; - } - result - } - - let bytes_per_entry = (self.header.map_entry_size as usize + 7) / 8; - let mut result = Vec::with_capacity(self.width * self.height * bytes_per_entry); - - if self.bytes_per_pixel == 0 { - return Err(io::ErrorKind::Other.into()); - } - - let color_map = self - .color_map - .as_ref() - .ok_or_else(|| io::Error::from(io::ErrorKind::Other))?; - - for chunk in pixel_data.chunks(self.bytes_per_pixel) { - let index = bytes_to_index(chunk); - if let Some(color) = color_map.get(index) { - result.extend_from_slice(color); - } else { - return Err(io::ErrorKind::Other.into()); - } - } - - Ok(result) - } - - /// Reads a run length encoded data for given number of bytes - fn read_encoded_data(&mut self, num_bytes: usize) -> io::Result<Vec<u8>> { - let mut pixel_data = Vec::with_capacity(num_bytes); - let mut repeat_buf = Vec::with_capacity(self.bytes_per_pixel); - - while pixel_data.len() < num_bytes { - let run_packet = self.r.read_u8()?; - // If the highest bit in `run_packet` is set, then we repeat pixels - // - // Note: the TGA format adds 1 to both counts because having a count - // of 0 would be pointless. - if (run_packet & 0x80) != 0 { - // high bit set, so we will repeat the data - let repeat_count = ((run_packet & !0x80) + 1) as usize; - self.r - .by_ref() - .take(self.bytes_per_pixel as u64) - .read_to_end(&mut repeat_buf)?; - - // get the repeating pixels from the bytes of the pixel stored in `repeat_buf` - let data = repeat_buf - .iter() - .cycle() - .take(repeat_count * self.bytes_per_pixel); - pixel_data.extend(data); - repeat_buf.clear(); - } else { - // not set, so `run_packet+1` is the number of non-encoded pixels - let num_raw_bytes = (run_packet + 1) as usize * self.bytes_per_pixel; - self.r - .by_ref() - .take(num_raw_bytes as u64) - .read_to_end(&mut pixel_data)?; - } - } - - if pixel_data.len() > num_bytes { - // FIXME: the last packet contained more data than we asked for! - // This is at least a warning. We truncate the data since some methods rely on the - // length to be accurate in the success case. - pixel_data.truncate(num_bytes); - } - - Ok(pixel_data) - } - - /// Reads a run length encoded packet - fn read_all_encoded_data(&mut self) -> ImageResult<Vec<u8>> { - let num_bytes = self.width * self.height * self.bytes_per_pixel; - - Ok(self.read_encoded_data(num_bytes)?) - } - - /// Reads a run length encoded line - fn read_encoded_line(&mut self) -> io::Result<Vec<u8>> { - let line_num_bytes = self.width * self.bytes_per_pixel; - let remain_len = self.line_remain_buff.len(); - - if remain_len >= line_num_bytes { - // `Vec::split_to` if std had it - let bytes = { - let bytes_after = self.line_remain_buff.split_off(line_num_bytes); - mem::replace(&mut self.line_remain_buff, bytes_after) - }; - - return Ok(bytes); - } - - let num_bytes = line_num_bytes - remain_len; - - let line_data = self.read_encoded_data(num_bytes)?; - - let mut pixel_data = Vec::with_capacity(line_num_bytes); - pixel_data.append(&mut self.line_remain_buff); - pixel_data.extend_from_slice(&line_data[..num_bytes]); - - // put the remain data to line_remain_buff. - // expects `self.line_remain_buff` to be empty from - // the above `pixel_data.append` call - debug_assert!(self.line_remain_buff.is_empty()); - self.line_remain_buff - .extend_from_slice(&line_data[num_bytes..]); - - Ok(pixel_data) - } - - /// Reverse from BGR encoding to RGB encoding - /// - /// TGA files are stored in the BGRA encoding. This function swaps - /// the blue and red bytes in the `pixels` array. - fn reverse_encoding_in_output(&mut self, pixels: &mut [u8]) { - // We only need to reverse the encoding of color images - match self.color_type { - ColorType::Rgb8 | ColorType::Rgba8 => { - for chunk in pixels.chunks_mut(self.color_type.bytes_per_pixel().into()) { - chunk.swap(0, 2); - } - } - _ => {} - } - } - - /// Flip the image vertically depending on the screen origin bit - /// - /// The bit in position 5 of the image descriptor byte is the screen origin bit. - /// If it's 1, the origin is in the top left corner. - /// If it's 0, the origin is in the bottom left corner. - /// This function checks the bit, and if it's 0, flips the image vertically. - fn flip_vertically(&mut self, pixels: &mut [u8]) { - if self.is_flipped_vertically() { - if self.height == 0 { - return; - } - - let num_bytes = pixels.len(); - - let width_bytes = num_bytes / self.height; - - // Flip the image vertically. - for vertical_index in 0..(self.height / 2) { - let vertical_target = (self.height - vertical_index) * width_bytes - width_bytes; - - for horizontal_index in 0..width_bytes { - let source = vertical_index * width_bytes + horizontal_index; - let target = vertical_target + horizontal_index; - - pixels.swap(target, source); - } - } - } - } - - /// Check whether the image is vertically flipped - /// - /// The bit in position 5 of the image descriptor byte is the screen origin bit. - /// If it's 1, the origin is in the top left corner. - /// If it's 0, the origin is in the bottom left corner. - /// This function checks the bit, and if it's 0, flips the image vertically. - fn is_flipped_vertically(&self) -> bool { - let screen_origin_bit = SCREEN_ORIGIN_BIT_MASK & self.header.image_desc != 0; - !screen_origin_bit - } - - fn read_scanline(&mut self, buf: &mut [u8]) -> io::Result<usize> { - if let Some(line_read) = self.line_read { - if line_read == self.height { - return Ok(0); - } - } - - // read the pixels from the data region - let mut pixel_data = if self.image_type.is_encoded() { - self.read_encoded_line()? - } else { - let num_raw_bytes = self.width * self.bytes_per_pixel; - let mut buf = vec![0; num_raw_bytes]; - self.r.by_ref().read_exact(&mut buf)?; - buf - }; - - // expand the indices using the color map if necessary - if self.image_type.is_color_mapped() { - pixel_data = self.expand_color_map(&pixel_data)?; - } - self.reverse_encoding_in_output(&mut pixel_data); - - // copy to the output buffer - buf[..pixel_data.len()].copy_from_slice(&pixel_data); - - self.line_read = Some(self.line_read.unwrap_or(0) + 1); - - Ok(pixel_data.len()) - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoder<'a> for TgaDecoder<R> { - type Reader = TGAReader<R>; - - fn dimensions(&self) -> (u32, u32) { - (self.width as u32, self.height as u32) - } - - fn color_type(&self) -> ColorType { - self.color_type - } - - fn original_color_type(&self) -> ExtendedColorType { - self.original_color_type - .unwrap_or_else(|| self.color_type().into()) - } - - fn scanline_bytes(&self) -> u64 { - // This cannot overflow because TGA has a maximum width of u16::MAX_VALUE and - // `bytes_per_pixel` is a u8. - u64::from(self.color_type.bytes_per_pixel()) * self.width as u64 - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - Ok(TGAReader { - buffer: ImageReadBuffer::new(self.scanline_bytes(), self.total_bytes()), - decoder: self, - }) - } - - fn read_image(mut self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - - // In indexed images, we might need more bytes than pixels to read them. That's nonsensical - // to encode but we'll not want to crash. - let mut fallback_buf = vec![]; - // read the pixels from the data region - let rawbuf = if self.image_type.is_encoded() { - let pixel_data = self.read_all_encoded_data()?; - if self.bytes_per_pixel <= usize::from(self.color_type.bytes_per_pixel()) { - buf[..pixel_data.len()].copy_from_slice(&pixel_data); - &buf[..pixel_data.len()] - } else { - fallback_buf = pixel_data; - &fallback_buf[..] - } - } else { - let num_raw_bytes = self.width * self.height * self.bytes_per_pixel; - if self.bytes_per_pixel <= usize::from(self.color_type.bytes_per_pixel()) { - self.r.by_ref().read_exact(&mut buf[..num_raw_bytes])?; - &buf[..num_raw_bytes] - } else { - fallback_buf.resize(num_raw_bytes, 0u8); - self.r - .by_ref() - .read_exact(&mut fallback_buf[..num_raw_bytes])?; - &fallback_buf[..num_raw_bytes] - } - }; - - // expand the indices using the color map if necessary - if self.image_type.is_color_mapped() { - let pixel_data = self.expand_color_map(rawbuf)?; - // not enough data to fill the buffer, or would overflow the buffer - if pixel_data.len() != buf.len() { - return Err(ImageError::Limits(LimitError::from_kind( - LimitErrorKind::DimensionError, - ))); - } - buf.copy_from_slice(&pixel_data); - } - - self.reverse_encoding_in_output(buf); - - self.flip_vertically(buf); - - Ok(()) - } -} - -pub struct TGAReader<R> { - buffer: ImageReadBuffer, - decoder: TgaDecoder<R>, -} -impl<R: Read + Seek> Read for TGAReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - let decoder = &mut self.decoder; - self.buffer.read(buf, |buf| decoder.read_scanline(buf)) - } -} diff --git a/vendor/image/src/codecs/tga/encoder.rs b/vendor/image/src/codecs/tga/encoder.rs deleted file mode 100644 index cf34984..0000000 --- a/vendor/image/src/codecs/tga/encoder.rs +++ /dev/null @@ -1,215 +0,0 @@ -use super::header::Header; -use crate::{error::EncodingError, ColorType, ImageEncoder, ImageError, ImageFormat, ImageResult}; -use std::{convert::TryFrom, error, fmt, io::Write}; - -/// Errors that can occur during encoding and saving of a TGA image. -#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)] -enum EncoderError { - /// Invalid TGA width. - WidthInvalid(u32), - - /// Invalid TGA height. - HeightInvalid(u32), -} - -impl fmt::Display for EncoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - EncoderError::WidthInvalid(s) => f.write_fmt(format_args!("Invalid TGA width: {}", s)), - EncoderError::HeightInvalid(s) => { - f.write_fmt(format_args!("Invalid TGA height: {}", s)) - } - } - } -} - -impl From<EncoderError> for ImageError { - fn from(e: EncoderError) -> ImageError { - ImageError::Encoding(EncodingError::new(ImageFormat::Tga.into(), e)) - } -} - -impl error::Error for EncoderError {} - -/// TGA encoder. -pub struct TgaEncoder<W: Write> { - writer: W, -} - -impl<W: Write> TgaEncoder<W> { - /// Create a new encoder that writes its output to ```w```. - pub fn new(w: W) -> TgaEncoder<W> { - TgaEncoder { writer: w } - } - - /// Encodes the image ```buf``` that has dimensions ```width``` - /// and ```height``` and ```ColorType``` ```color_type```. - /// - /// The dimensions of the image must be between 0 and 65535 (inclusive) or - /// an error will be returned. - pub fn encode( - mut self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - // Validate dimensions. - let width = u16::try_from(width) - .map_err(|_| ImageError::from(EncoderError::WidthInvalid(width)))?; - - let height = u16::try_from(height) - .map_err(|_| ImageError::from(EncoderError::HeightInvalid(height)))?; - - // Write out TGA header. - let header = Header::from_pixel_info(color_type, width, height)?; - header.write_to(&mut self.writer)?; - - // Write out Bgr(a)8 or L(a)8 image data. - match color_type { - ColorType::Rgb8 | ColorType::Rgba8 => { - let mut image = Vec::from(buf); - - for chunk in image.chunks_mut(usize::from(color_type.bytes_per_pixel())) { - chunk.swap(0, 2); - } - - self.writer.write_all(&image)?; - } - _ => { - self.writer.write_all(buf)?; - } - } - - Ok(()) - } -} - -impl<W: Write> ImageEncoder for TgaEncoder<W> { - fn write_image( - self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - self.encode(buf, width, height, color_type) - } -} - -#[cfg(test)] -mod tests { - use super::{EncoderError, TgaEncoder}; - use crate::{codecs::tga::TgaDecoder, ColorType, ImageDecoder, ImageError}; - use std::{error::Error, io::Cursor}; - - fn round_trip_image(image: &[u8], width: u32, height: u32, c: ColorType) -> Vec<u8> { - let mut encoded_data = Vec::new(); - { - let encoder = TgaEncoder::new(&mut encoded_data); - encoder - .encode(&image, width, height, c) - .expect("could not encode image"); - } - - let decoder = TgaDecoder::new(Cursor::new(&encoded_data)).expect("failed to decode"); - - let mut buf = vec![0; decoder.total_bytes() as usize]; - decoder.read_image(&mut buf).expect("failed to decode"); - buf - } - - #[test] - fn test_image_width_too_large() { - // TGA cannot encode images larger than 65,535×65,535 - // create a 65,536×1 8-bit black image buffer - let size = usize::from(u16::MAX) + 1; - let dimension = size as u32; - let img = vec![0u8; size]; - // Try to encode an image that is too large - let mut encoded = Vec::new(); - let encoder = TgaEncoder::new(&mut encoded); - let result = encoder.encode(&img, dimension, 1, ColorType::L8); - match result { - Err(ImageError::Encoding(err)) => { - let err = err - .source() - .unwrap() - .downcast_ref::<EncoderError>() - .unwrap(); - assert_eq!(*err, EncoderError::WidthInvalid(dimension)); - } - other => panic!( - "Encoding an image that is too wide should return a InvalidWidth \ - it returned {:?} instead", - other - ), - } - } - - #[test] - fn test_image_height_too_large() { - // TGA cannot encode images larger than 65,535×65,535 - // create a 65,536×1 8-bit black image buffer - let size = usize::from(u16::MAX) + 1; - let dimension = size as u32; - let img = vec![0u8; size]; - // Try to encode an image that is too large - let mut encoded = Vec::new(); - let encoder = TgaEncoder::new(&mut encoded); - let result = encoder.encode(&img, 1, dimension, ColorType::L8); - match result { - Err(ImageError::Encoding(err)) => { - let err = err - .source() - .unwrap() - .downcast_ref::<EncoderError>() - .unwrap(); - assert_eq!(*err, EncoderError::HeightInvalid(dimension)); - } - other => panic!( - "Encoding an image that is too tall should return a InvalidHeight \ - it returned {:?} instead", - other - ), - } - } - - #[test] - fn round_trip_single_pixel_rgb() { - let image = [0, 1, 2]; - let decoded = round_trip_image(&image, 1, 1, ColorType::Rgb8); - assert_eq!(decoded.len(), image.len()); - assert_eq!(decoded.as_slice(), image); - } - - #[test] - fn round_trip_single_pixel_rgba() { - let image = [0, 1, 2, 3]; - let decoded = round_trip_image(&image, 1, 1, ColorType::Rgba8); - assert_eq!(decoded.len(), image.len()); - assert_eq!(decoded.as_slice(), image); - } - - #[test] - fn round_trip_gray() { - let image = [0, 1, 2]; - let decoded = round_trip_image(&image, 3, 1, ColorType::L8); - assert_eq!(decoded.len(), image.len()); - assert_eq!(decoded.as_slice(), image); - } - - #[test] - fn round_trip_graya() { - let image = [0, 1, 2, 3, 4, 5]; - let decoded = round_trip_image(&image, 1, 3, ColorType::La8); - assert_eq!(decoded.len(), image.len()); - assert_eq!(decoded.as_slice(), image); - } - - #[test] - fn round_trip_3px_rgb() { - let image = [0; 3 * 3 * 3]; // 3x3 pixels, 3 bytes per pixel - let _decoded = round_trip_image(&image, 3, 3, ColorType::Rgb8); - } -} diff --git a/vendor/image/src/codecs/tga/header.rs b/vendor/image/src/codecs/tga/header.rs deleted file mode 100644 index 83ba7a3..0000000 --- a/vendor/image/src/codecs/tga/header.rs +++ /dev/null @@ -1,150 +0,0 @@ -use crate::{ - error::{UnsupportedError, UnsupportedErrorKind}, - ColorType, ImageError, ImageFormat, ImageResult, -}; -use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; -use std::io::{Read, Write}; - -pub(crate) const ALPHA_BIT_MASK: u8 = 0b1111; -pub(crate) const SCREEN_ORIGIN_BIT_MASK: u8 = 0b10_0000; - -pub(crate) enum ImageType { - NoImageData = 0, - /// Uncompressed images. - RawColorMap = 1, - RawTrueColor = 2, - RawGrayScale = 3, - /// Run length encoded images. - RunColorMap = 9, - RunTrueColor = 10, - RunGrayScale = 11, - Unknown, -} - -impl ImageType { - /// Create a new image type from a u8. - pub(crate) fn new(img_type: u8) -> ImageType { - match img_type { - 0 => ImageType::NoImageData, - - 1 => ImageType::RawColorMap, - 2 => ImageType::RawTrueColor, - 3 => ImageType::RawGrayScale, - - 9 => ImageType::RunColorMap, - 10 => ImageType::RunTrueColor, - 11 => ImageType::RunGrayScale, - - _ => ImageType::Unknown, - } - } - - /// Check if the image format uses colors as opposed to gray scale. - pub(crate) fn is_color(&self) -> bool { - matches! { *self, - ImageType::RawColorMap - | ImageType::RawTrueColor - | ImageType::RunTrueColor - | ImageType::RunColorMap - } - } - - /// Does the image use a color map. - pub(crate) fn is_color_mapped(&self) -> bool { - matches! { *self, ImageType::RawColorMap | ImageType::RunColorMap } - } - - /// Is the image run length encoded. - pub(crate) fn is_encoded(&self) -> bool { - matches! {*self, ImageType::RunColorMap | ImageType::RunTrueColor | ImageType::RunGrayScale } - } -} - -/// Header used by TGA image files. -#[derive(Debug, Default)] -pub(crate) struct Header { - pub(crate) id_length: u8, // length of ID string - pub(crate) map_type: u8, // color map type - pub(crate) image_type: u8, // image type code - pub(crate) map_origin: u16, // starting index of map - pub(crate) map_length: u16, // length of map - pub(crate) map_entry_size: u8, // size of map entries in bits - pub(crate) x_origin: u16, // x-origin of image - pub(crate) y_origin: u16, // y-origin of image - pub(crate) image_width: u16, // width of image - pub(crate) image_height: u16, // height of image - pub(crate) pixel_depth: u8, // bits per pixel - pub(crate) image_desc: u8, // image descriptor -} - -impl Header { - /// Load the header with values from pixel information. - pub(crate) fn from_pixel_info( - color_type: ColorType, - width: u16, - height: u16, - ) -> ImageResult<Self> { - let mut header = Self::default(); - - if width > 0 && height > 0 { - let (num_alpha_bits, other_channel_bits, image_type) = match color_type { - ColorType::Rgba8 => (8, 24, ImageType::RawTrueColor), - ColorType::Rgb8 => (0, 24, ImageType::RawTrueColor), - ColorType::La8 => (8, 8, ImageType::RawGrayScale), - ColorType::L8 => (0, 8, ImageType::RawGrayScale), - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Tga.into(), - UnsupportedErrorKind::Color(color_type.into()), - ), - )) - } - }; - - header.image_type = image_type as u8; - header.image_width = width; - header.image_height = height; - header.pixel_depth = num_alpha_bits + other_channel_bits; - header.image_desc = num_alpha_bits & ALPHA_BIT_MASK; - header.image_desc |= SCREEN_ORIGIN_BIT_MASK; // Upper left origin. - } - - Ok(header) - } - - /// Load the header with values from the reader. - pub(crate) fn from_reader(r: &mut dyn Read) -> ImageResult<Self> { - Ok(Self { - id_length: r.read_u8()?, - map_type: r.read_u8()?, - image_type: r.read_u8()?, - map_origin: r.read_u16::<LittleEndian>()?, - map_length: r.read_u16::<LittleEndian>()?, - map_entry_size: r.read_u8()?, - x_origin: r.read_u16::<LittleEndian>()?, - y_origin: r.read_u16::<LittleEndian>()?, - image_width: r.read_u16::<LittleEndian>()?, - image_height: r.read_u16::<LittleEndian>()?, - pixel_depth: r.read_u8()?, - image_desc: r.read_u8()?, - }) - } - - /// Write out the header values. - pub(crate) fn write_to(&self, w: &mut dyn Write) -> ImageResult<()> { - w.write_u8(self.id_length)?; - w.write_u8(self.map_type)?; - w.write_u8(self.image_type)?; - w.write_u16::<LittleEndian>(self.map_origin)?; - w.write_u16::<LittleEndian>(self.map_length)?; - w.write_u8(self.map_entry_size)?; - w.write_u16::<LittleEndian>(self.x_origin)?; - w.write_u16::<LittleEndian>(self.y_origin)?; - w.write_u16::<LittleEndian>(self.image_width)?; - w.write_u16::<LittleEndian>(self.image_height)?; - w.write_u8(self.pixel_depth)?; - w.write_u8(self.image_desc)?; - Ok(()) - } -} diff --git a/vendor/image/src/codecs/tga/mod.rs b/vendor/image/src/codecs/tga/mod.rs deleted file mode 100644 index fdc2f0c..0000000 --- a/vendor/image/src/codecs/tga/mod.rs +++ /dev/null @@ -1,17 +0,0 @@ -//! Decoding of TGA Images -//! -//! # Related Links -//! <http://googlesites.inequation.org/tgautilities> - -/// A decoder for TGA images -/// -/// Currently this decoder does not support 8, 15 and 16 bit color images. -pub use self::decoder::TgaDecoder; - -//TODO add 8, 15, 16 bit color support - -pub use self::encoder::TgaEncoder; - -mod decoder; -mod encoder; -mod header; diff --git a/vendor/image/src/codecs/tiff.rs b/vendor/image/src/codecs/tiff.rs deleted file mode 100644 index 7c33412..0000000 --- a/vendor/image/src/codecs/tiff.rs +++ /dev/null @@ -1,353 +0,0 @@ -//! Decoding and Encoding of TIFF Images -//! -//! TIFF (Tagged Image File Format) is a versatile image format that supports -//! lossless and lossy compression. -//! -//! # Related Links -//! * <http://partners.adobe.com/public/developer/tiff/index.html> - The TIFF specification - -extern crate tiff; - -use std::convert::TryFrom; -use std::io::{self, Cursor, Read, Seek, Write}; -use std::marker::PhantomData; -use std::mem; - -use crate::color::{ColorType, ExtendedColorType}; -use crate::error::{ - DecodingError, EncodingError, ImageError, ImageResult, LimitError, LimitErrorKind, - ParameterError, ParameterErrorKind, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::{ImageDecoder, ImageEncoder, ImageFormat}; -use crate::utils; - -/// Decoder for TIFF images. -pub struct TiffDecoder<R> -where - R: Read + Seek, -{ - dimensions: (u32, u32), - color_type: ColorType, - - // We only use an Option here so we can call with_limits on the decoder without moving. - inner: Option<tiff::decoder::Decoder<R>>, -} - -impl<R> TiffDecoder<R> -where - R: Read + Seek, -{ - /// Create a new TiffDecoder. - pub fn new(r: R) -> Result<TiffDecoder<R>, ImageError> { - let mut inner = tiff::decoder::Decoder::new(r).map_err(ImageError::from_tiff_decode)?; - - let dimensions = inner.dimensions().map_err(ImageError::from_tiff_decode)?; - let color_type = inner.colortype().map_err(ImageError::from_tiff_decode)?; - match inner.find_tag_unsigned_vec::<u16>(tiff::tags::Tag::SampleFormat) { - Ok(Some(sample_formats)) => { - for format in sample_formats { - check_sample_format(format)?; - } - } - Ok(None) => { /* assume UInt format */ } - Err(other) => return Err(ImageError::from_tiff_decode(other)), - }; - - let color_type = match color_type { - tiff::ColorType::Gray(8) => ColorType::L8, - tiff::ColorType::Gray(16) => ColorType::L16, - tiff::ColorType::GrayA(8) => ColorType::La8, - tiff::ColorType::GrayA(16) => ColorType::La16, - tiff::ColorType::RGB(8) => ColorType::Rgb8, - tiff::ColorType::RGB(16) => ColorType::Rgb16, - tiff::ColorType::RGBA(8) => ColorType::Rgba8, - tiff::ColorType::RGBA(16) => ColorType::Rgba16, - - tiff::ColorType::Palette(n) | tiff::ColorType::Gray(n) => { - return Err(err_unknown_color_type(n)) - } - tiff::ColorType::GrayA(n) => return Err(err_unknown_color_type(n.saturating_mul(2))), - tiff::ColorType::RGB(n) => return Err(err_unknown_color_type(n.saturating_mul(3))), - tiff::ColorType::YCbCr(n) => return Err(err_unknown_color_type(n.saturating_mul(3))), - tiff::ColorType::RGBA(n) | tiff::ColorType::CMYK(n) => { - return Err(err_unknown_color_type(n.saturating_mul(4))) - } - }; - - Ok(TiffDecoder { - dimensions, - color_type, - inner: Some(inner), - }) - } -} - -fn check_sample_format(sample_format: u16) -> Result<(), ImageError> { - match tiff::tags::SampleFormat::from_u16(sample_format) { - Some(tiff::tags::SampleFormat::Uint) => Ok(()), - Some(other) => Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Tiff.into(), - UnsupportedErrorKind::GenericFeature(format!( - "Unhandled TIFF sample format {:?}", - other - )), - ), - )), - None => Err(ImageError::Decoding(DecodingError::from_format_hint( - ImageFormat::Tiff.into(), - ))), - } -} - -fn err_unknown_color_type(value: u8) -> ImageError { - ImageError::Unsupported(UnsupportedError::from_format_and_kind( - ImageFormat::Tiff.into(), - UnsupportedErrorKind::Color(ExtendedColorType::Unknown(value)), - )) -} - -impl ImageError { - fn from_tiff_decode(err: tiff::TiffError) -> ImageError { - match err { - tiff::TiffError::IoError(err) => ImageError::IoError(err), - err @ tiff::TiffError::FormatError(_) - | err @ tiff::TiffError::IntSizeError - | err @ tiff::TiffError::UsageError(_) => { - ImageError::Decoding(DecodingError::new(ImageFormat::Tiff.into(), err)) - } - tiff::TiffError::UnsupportedError(desc) => { - ImageError::Unsupported(UnsupportedError::from_format_and_kind( - ImageFormat::Tiff.into(), - UnsupportedErrorKind::GenericFeature(desc.to_string()), - )) - } - tiff::TiffError::LimitsExceeded => { - ImageError::Limits(LimitError::from_kind(LimitErrorKind::InsufficientMemory)) - } - } - } - - fn from_tiff_encode(err: tiff::TiffError) -> ImageError { - match err { - tiff::TiffError::IoError(err) => ImageError::IoError(err), - err @ tiff::TiffError::FormatError(_) - | err @ tiff::TiffError::IntSizeError - | err @ tiff::TiffError::UsageError(_) => { - ImageError::Encoding(EncodingError::new(ImageFormat::Tiff.into(), err)) - } - tiff::TiffError::UnsupportedError(desc) => { - ImageError::Unsupported(UnsupportedError::from_format_and_kind( - ImageFormat::Tiff.into(), - UnsupportedErrorKind::GenericFeature(desc.to_string()), - )) - } - tiff::TiffError::LimitsExceeded => { - ImageError::Limits(LimitError::from_kind(LimitErrorKind::InsufficientMemory)) - } - } - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct TiffReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for TiffReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read + Seek> ImageDecoder<'a> for TiffDecoder<R> { - type Reader = TiffReader<R>; - - fn dimensions(&self) -> (u32, u32) { - self.dimensions - } - - fn color_type(&self) -> ColorType { - self.color_type - } - - fn icc_profile(&mut self) -> Option<Vec<u8>> { - if let Some(decoder) = &mut self.inner { - decoder.get_tag_u8_vec(tiff::tags::Tag::Unknown(34675)).ok() - } else { - None - } - } - - fn set_limits(&mut self, limits: crate::io::Limits) -> ImageResult<()> { - limits.check_support(&crate::io::LimitSupport::default())?; - - let (width, height) = self.dimensions(); - limits.check_dimensions(width, height)?; - - let max_alloc = limits.max_alloc.unwrap_or(u64::MAX); - let max_intermediate_alloc = max_alloc.saturating_sub(self.total_bytes()); - - let mut tiff_limits: tiff::decoder::Limits = Default::default(); - tiff_limits.decoding_buffer_size = - usize::try_from(max_alloc - max_intermediate_alloc).unwrap_or(usize::MAX); - tiff_limits.intermediate_buffer_size = - usize::try_from(max_intermediate_alloc).unwrap_or(usize::MAX); - tiff_limits.ifd_value_size = tiff_limits.intermediate_buffer_size; - self.inner = Some(self.inner.take().unwrap().with_limits(tiff_limits)); - - Ok(()) - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - let buf = match self - .inner - .unwrap() - .read_image() - .map_err(ImageError::from_tiff_decode)? - { - tiff::decoder::DecodingResult::U8(v) => v, - tiff::decoder::DecodingResult::U16(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::U32(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::U64(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::I8(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::I16(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::I32(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::I64(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::F32(v) => utils::vec_copy_to_u8(&v), - tiff::decoder::DecodingResult::F64(v) => utils::vec_copy_to_u8(&v), - }; - - Ok(TiffReader(Cursor::new(buf), PhantomData)) - } - - fn read_image(self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - match self - .inner - .unwrap() - .read_image() - .map_err(ImageError::from_tiff_decode)? - { - tiff::decoder::DecodingResult::U8(v) => { - buf.copy_from_slice(&v); - } - tiff::decoder::DecodingResult::U16(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::U32(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::U64(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::I8(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::I16(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::I32(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::I64(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::F32(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - tiff::decoder::DecodingResult::F64(v) => { - buf.copy_from_slice(bytemuck::cast_slice(&v)); - } - } - Ok(()) - } -} - -/// Encoder for tiff images -pub struct TiffEncoder<W> { - w: W, -} - -// Utility to simplify and deduplicate error handling during 16-bit encoding. -fn u8_slice_as_u16(buf: &[u8]) -> ImageResult<&[u16]> { - bytemuck::try_cast_slice(buf).map_err(|err| { - // If the buffer is not aligned or the correct length for a u16 slice, err. - // - // `bytemuck::PodCastError` of bytemuck-1.2.0 does not implement - // `Error` and `Display` trait. - // See <https://github.com/Lokathor/bytemuck/issues/22>. - ImageError::Parameter(ParameterError::from_kind(ParameterErrorKind::Generic( - format!("{:?}", err), - ))) - }) -} - -impl<W: Write + Seek> TiffEncoder<W> { - /// Create a new encoder that writes its output to `w` - pub fn new(w: W) -> TiffEncoder<W> { - TiffEncoder { w } - } - - /// Encodes the image `image` that has dimensions `width` and `height` and `ColorType` `c`. - /// - /// 16-bit types assume the buffer is native endian. - pub fn encode(self, data: &[u8], width: u32, height: u32, color: ColorType) -> ImageResult<()> { - let mut encoder = - tiff::encoder::TiffEncoder::new(self.w).map_err(ImageError::from_tiff_encode)?; - match color { - ColorType::L8 => { - encoder.write_image::<tiff::encoder::colortype::Gray8>(width, height, data) - } - ColorType::Rgb8 => { - encoder.write_image::<tiff::encoder::colortype::RGB8>(width, height, data) - } - ColorType::Rgba8 => { - encoder.write_image::<tiff::encoder::colortype::RGBA8>(width, height, data) - } - ColorType::L16 => encoder.write_image::<tiff::encoder::colortype::Gray16>( - width, - height, - u8_slice_as_u16(data)?, - ), - ColorType::Rgb16 => encoder.write_image::<tiff::encoder::colortype::RGB16>( - width, - height, - u8_slice_as_u16(data)?, - ), - ColorType::Rgba16 => encoder.write_image::<tiff::encoder::colortype::RGBA16>( - width, - height, - u8_slice_as_u16(data)?, - ), - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::Tiff.into(), - UnsupportedErrorKind::Color(color.into()), - ), - )) - } - } - .map_err(ImageError::from_tiff_encode)?; - - Ok(()) - } -} - -impl<W: Write + Seek> ImageEncoder for TiffEncoder<W> { - fn write_image( - self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - self.encode(buf, width, height, color_type) - } -} diff --git a/vendor/image/src/codecs/webp/decoder.rs b/vendor/image/src/codecs/webp/decoder.rs deleted file mode 100644 index 9120290..0000000 --- a/vendor/image/src/codecs/webp/decoder.rs +++ /dev/null @@ -1,399 +0,0 @@ -use byteorder::{LittleEndian, ReadBytesExt}; -use std::convert::TryFrom; -use std::io::{self, Cursor, Error, Read}; -use std::marker::PhantomData; -use std::{error, fmt, mem}; - -use crate::error::{DecodingError, ImageError, ImageResult, ParameterError, ParameterErrorKind}; -use crate::image::{ImageDecoder, ImageFormat}; -use crate::{color, AnimationDecoder, Frames, Rgba}; - -use super::lossless::{LosslessDecoder, LosslessFrame}; -use super::vp8::{Frame as VP8Frame, Vp8Decoder}; - -use super::extended::{read_extended_header, ExtendedImage}; - -/// All errors that can occur when attempting to parse a WEBP container -#[derive(Debug, Clone, Copy)] -pub(crate) enum DecoderError { - /// RIFF's "RIFF" signature not found or invalid - RiffSignatureInvalid([u8; 4]), - /// WebP's "WEBP" signature not found or invalid - WebpSignatureInvalid([u8; 4]), - /// Chunk Header was incorrect or invalid in its usage - ChunkHeaderInvalid([u8; 4]), -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - struct SignatureWriter([u8; 4]); - impl fmt::Display for SignatureWriter { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!( - f, - "[{:#04X?}, {:#04X?}, {:#04X?}, {:#04X?}]", - self.0[0], self.0[1], self.0[2], self.0[3] - ) - } - } - - match self { - DecoderError::RiffSignatureInvalid(riff) => f.write_fmt(format_args!( - "Invalid RIFF signature: {}", - SignatureWriter(*riff) - )), - DecoderError::WebpSignatureInvalid(webp) => f.write_fmt(format_args!( - "Invalid WebP signature: {}", - SignatureWriter(*webp) - )), - DecoderError::ChunkHeaderInvalid(header) => f.write_fmt(format_args!( - "Invalid Chunk header: {}", - SignatureWriter(*header) - )), - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::WebP.into(), e)) - } -} - -impl error::Error for DecoderError {} - -/// All possible RIFF chunks in a WebP image file -#[allow(clippy::upper_case_acronyms)] -#[derive(Debug, Clone, Copy, PartialEq)] -pub(crate) enum WebPRiffChunk { - RIFF, - WEBP, - VP8, - VP8L, - VP8X, - ANIM, - ANMF, - ALPH, - ICCP, - EXIF, - XMP, -} - -impl WebPRiffChunk { - pub(crate) fn from_fourcc(chunk_fourcc: [u8; 4]) -> ImageResult<Self> { - match &chunk_fourcc { - b"RIFF" => Ok(Self::RIFF), - b"WEBP" => Ok(Self::WEBP), - b"VP8 " => Ok(Self::VP8), - b"VP8L" => Ok(Self::VP8L), - b"VP8X" => Ok(Self::VP8X), - b"ANIM" => Ok(Self::ANIM), - b"ANMF" => Ok(Self::ANMF), - b"ALPH" => Ok(Self::ALPH), - b"ICCP" => Ok(Self::ICCP), - b"EXIF" => Ok(Self::EXIF), - b"XMP " => Ok(Self::XMP), - _ => Err(DecoderError::ChunkHeaderInvalid(chunk_fourcc).into()), - } - } - - pub(crate) fn to_fourcc(&self) -> [u8; 4] { - match self { - Self::RIFF => *b"RIFF", - Self::WEBP => *b"WEBP", - Self::VP8 => *b"VP8 ", - Self::VP8L => *b"VP8L", - Self::VP8X => *b"VP8X", - Self::ANIM => *b"ANIM", - Self::ANMF => *b"ANMF", - Self::ALPH => *b"ALPH", - Self::ICCP => *b"ICCP", - Self::EXIF => *b"EXIF", - Self::XMP => *b"XMP ", - } - } -} - -enum WebPImage { - Lossy(VP8Frame), - Lossless(LosslessFrame), - Extended(ExtendedImage), -} - -/// WebP Image format decoder. Currently only supports lossy RGB images or lossless RGBA images. -pub struct WebPDecoder<R> { - r: R, - image: WebPImage, -} - -impl<R: Read> WebPDecoder<R> { - /// Create a new WebPDecoder from the Reader ```r```. - /// This function takes ownership of the Reader. - pub fn new(r: R) -> ImageResult<WebPDecoder<R>> { - let image = WebPImage::Lossy(Default::default()); - - let mut decoder = WebPDecoder { r, image }; - decoder.read_data()?; - Ok(decoder) - } - - //reads the 12 bytes of the WebP file header - fn read_riff_header(&mut self) -> ImageResult<u32> { - let mut riff = [0; 4]; - self.r.read_exact(&mut riff)?; - if &riff != b"RIFF" { - return Err(DecoderError::RiffSignatureInvalid(riff).into()); - } - - let size = self.r.read_u32::<LittleEndian>()?; - - let mut webp = [0; 4]; - self.r.read_exact(&mut webp)?; - if &webp != b"WEBP" { - return Err(DecoderError::WebpSignatureInvalid(webp).into()); - } - - Ok(size) - } - - //reads the chunk header, decodes the frame and returns the inner decoder - fn read_frame(&mut self) -> ImageResult<WebPImage> { - let chunk = read_chunk(&mut self.r)?; - - match chunk { - Some((cursor, WebPRiffChunk::VP8)) => { - let mut vp8_decoder = Vp8Decoder::new(cursor); - let frame = vp8_decoder.decode_frame()?; - - Ok(WebPImage::Lossy(frame.clone())) - } - Some((cursor, WebPRiffChunk::VP8L)) => { - let mut lossless_decoder = LosslessDecoder::new(cursor); - let frame = lossless_decoder.decode_frame()?; - - Ok(WebPImage::Lossless(frame.clone())) - } - Some((mut cursor, WebPRiffChunk::VP8X)) => { - let info = read_extended_header(&mut cursor)?; - - let image = ExtendedImage::read_extended_chunks(&mut self.r, info)?; - - Ok(WebPImage::Extended(image)) - } - None => Err(ImageError::IoError(Error::from( - io::ErrorKind::UnexpectedEof, - ))), - Some((_, chunk)) => Err(DecoderError::ChunkHeaderInvalid(chunk.to_fourcc()).into()), - } - } - - fn read_data(&mut self) -> ImageResult<()> { - let _size = self.read_riff_header()?; - - let image = self.read_frame()?; - - self.image = image; - - Ok(()) - } - - /// Returns true if the image as described by the bitstream is animated. - pub fn has_animation(&self) -> bool { - match &self.image { - WebPImage::Lossy(_) => false, - WebPImage::Lossless(_) => false, - WebPImage::Extended(extended) => extended.has_animation(), - } - } - - /// Sets the background color if the image is an extended and animated webp. - pub fn set_background_color(&mut self, color: Rgba<u8>) -> ImageResult<()> { - match &mut self.image { - WebPImage::Extended(image) => image.set_background_color(color), - _ => Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic( - "Background color can only be set on animated webp".to_owned(), - ), - ))), - } - } -} - -pub(crate) fn read_len_cursor<R>(r: &mut R) -> ImageResult<Cursor<Vec<u8>>> -where - R: Read, -{ - let unpadded_len = u64::from(r.read_u32::<LittleEndian>()?); - - // RIFF chunks containing an uneven number of bytes append - // an extra 0x00 at the end of the chunk - // - // The addition cannot overflow since we have a u64 that was created from a u32 - let len = unpadded_len + (unpadded_len % 2); - - let mut framedata = Vec::new(); - r.by_ref().take(len).read_to_end(&mut framedata)?; - - //remove padding byte - if unpadded_len % 2 == 1 { - framedata.pop(); - } - - Ok(io::Cursor::new(framedata)) -} - -/// Reads a chunk header FourCC -/// Returns None if and only if we hit end of file reading the four character code of the chunk -/// The inner error is `Err` if and only if the chunk header FourCC is present but unknown -pub(crate) fn read_fourcc<R: Read>(r: &mut R) -> ImageResult<Option<ImageResult<WebPRiffChunk>>> { - let mut chunk_fourcc = [0; 4]; - let result = r.read_exact(&mut chunk_fourcc); - - match result { - Ok(()) => {} - Err(err) => { - if err.kind() == io::ErrorKind::UnexpectedEof { - return Ok(None); - } else { - return Err(err.into()); - } - } - } - - let chunk = WebPRiffChunk::from_fourcc(chunk_fourcc); - Ok(Some(chunk)) -} - -/// Reads a chunk -/// Returns an error if the chunk header is not a valid webp header or some other reading error -/// Returns None if and only if we hit end of file reading the four character code of the chunk -pub(crate) fn read_chunk<R>(r: &mut R) -> ImageResult<Option<(Cursor<Vec<u8>>, WebPRiffChunk)>> -where - R: Read, -{ - if let Some(chunk) = read_fourcc(r)? { - let chunk = chunk?; - let cursor = read_len_cursor(r)?; - Ok(Some((cursor, chunk))) - } else { - Ok(None) - } -} - -/// Wrapper struct around a `Cursor<Vec<u8>>` -pub struct WebpReader<R>(Cursor<Vec<u8>>, PhantomData<R>); -impl<R> Read for WebpReader<R> { - fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { - self.0.read(buf) - } - fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> { - if self.0.position() == 0 && buf.is_empty() { - mem::swap(buf, self.0.get_mut()); - Ok(buf.len()) - } else { - self.0.read_to_end(buf) - } - } -} - -impl<'a, R: 'a + Read> ImageDecoder<'a> for WebPDecoder<R> { - type Reader = WebpReader<R>; - - fn dimensions(&self) -> (u32, u32) { - match &self.image { - WebPImage::Lossy(vp8_frame) => { - (u32::from(vp8_frame.width), u32::from(vp8_frame.height)) - } - WebPImage::Lossless(lossless_frame) => ( - u32::from(lossless_frame.width), - u32::from(lossless_frame.height), - ), - WebPImage::Extended(extended) => extended.dimensions(), - } - } - - fn color_type(&self) -> color::ColorType { - match &self.image { - WebPImage::Lossy(_) => color::ColorType::Rgb8, - WebPImage::Lossless(_) => color::ColorType::Rgba8, - WebPImage::Extended(extended) => extended.color_type(), - } - } - - fn into_reader(self) -> ImageResult<Self::Reader> { - match &self.image { - WebPImage::Lossy(vp8_frame) => { - let mut data = vec![0; vp8_frame.get_buf_size()]; - vp8_frame.fill_rgb(data.as_mut_slice()); - Ok(WebpReader(Cursor::new(data), PhantomData)) - } - WebPImage::Lossless(lossless_frame) => { - let mut data = vec![0; lossless_frame.get_buf_size()]; - lossless_frame.fill_rgba(data.as_mut_slice()); - Ok(WebpReader(Cursor::new(data), PhantomData)) - } - WebPImage::Extended(extended) => { - let mut data = vec![0; extended.get_buf_size()]; - extended.fill_buf(data.as_mut_slice()); - Ok(WebpReader(Cursor::new(data), PhantomData)) - } - } - } - - fn read_image(self, buf: &mut [u8]) -> ImageResult<()> { - assert_eq!(u64::try_from(buf.len()), Ok(self.total_bytes())); - - match &self.image { - WebPImage::Lossy(vp8_frame) => { - vp8_frame.fill_rgb(buf); - } - WebPImage::Lossless(lossless_frame) => { - lossless_frame.fill_rgba(buf); - } - WebPImage::Extended(extended) => { - extended.fill_buf(buf); - } - } - Ok(()) - } - - fn icc_profile(&mut self) -> Option<Vec<u8>> { - if let WebPImage::Extended(extended) = &self.image { - extended.icc_profile() - } else { - None - } - } -} - -impl<'a, R: 'a + Read> AnimationDecoder<'a> for WebPDecoder<R> { - fn into_frames(self) -> Frames<'a> { - match self.image { - WebPImage::Lossy(_) | WebPImage::Lossless(_) => { - Frames::new(Box::new(std::iter::empty())) - } - WebPImage::Extended(extended_image) => extended_image.into_frames(), - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn add_with_overflow_size() { - let bytes = vec![ - 0x52, 0x49, 0x46, 0x46, 0xaf, 0x37, 0x80, 0x47, 0x57, 0x45, 0x42, 0x50, 0x6c, 0x64, - 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xfb, 0x7e, 0x73, 0x00, 0x06, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, - 0x40, 0xfb, 0xff, 0xff, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, - 0x00, 0x00, 0x00, 0x00, 0x62, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x49, - 0x49, 0x54, 0x55, 0x50, 0x4c, 0x54, 0x59, 0x50, 0x45, 0x33, 0x37, 0x44, 0x4d, 0x46, - ]; - - let data = std::io::Cursor::new(bytes); - - let _ = WebPDecoder::new(data); - } -} diff --git a/vendor/image/src/codecs/webp/encoder.rs b/vendor/image/src/codecs/webp/encoder.rs deleted file mode 100644 index 0383046..0000000 --- a/vendor/image/src/codecs/webp/encoder.rs +++ /dev/null @@ -1,242 +0,0 @@ -//! Encoding of WebP images. -/// -/// Uses the simple encoding API from the [libwebp] library. -/// -/// [libwebp]: https://developers.google.com/speed/webp/docs/api#simple_encoding_api -use std::io::Write; - -use libwebp::{Encoder, PixelLayout, WebPMemory}; - -use crate::error::{ - EncodingError, ParameterError, ParameterErrorKind, UnsupportedError, UnsupportedErrorKind, -}; -use crate::flat::SampleLayout; -use crate::{ColorType, ImageEncoder, ImageError, ImageFormat, ImageResult}; - -/// WebP Encoder. -pub struct WebPEncoder<W> { - inner: W, - quality: WebPQuality, -} - -/// WebP encoder quality. -#[derive(Debug, Copy, Clone)] -pub struct WebPQuality(Quality); - -#[derive(Debug, Copy, Clone)] -enum Quality { - Lossless, - Lossy(u8), -} - -impl WebPQuality { - /// Minimum lossy quality value (0). - pub const MIN: u8 = 0; - /// Maximum lossy quality value (100). - pub const MAX: u8 = 100; - /// Default lossy quality (80), providing a balance of quality and file size. - pub const DEFAULT: u8 = 80; - - /// Lossless encoding. - pub fn lossless() -> Self { - Self(Quality::Lossless) - } - - /// Lossy encoding. 0 = low quality, small size; 100 = high quality, large size. - /// - /// Values are clamped from 0 to 100. - pub fn lossy(quality: u8) -> Self { - Self(Quality::Lossy(quality.clamp(Self::MIN, Self::MAX))) - } -} - -impl Default for WebPQuality { - fn default() -> Self { - Self::lossy(WebPQuality::DEFAULT) - } -} - -impl<W: Write> WebPEncoder<W> { - /// Create a new encoder that writes its output to `w`. - /// - /// Defaults to lossy encoding, see [`WebPQuality::DEFAULT`]. - pub fn new(w: W) -> Self { - WebPEncoder::new_with_quality(w, WebPQuality::default()) - } - - /// Create a new encoder with the specified quality, that writes its output to `w`. - pub fn new_with_quality(w: W, quality: WebPQuality) -> Self { - Self { inner: w, quality } - } - - /// Encode image data with the indicated color type. - /// - /// The encoder requires image data be Rgb8 or Rgba8. - pub fn encode( - mut self, - data: &[u8], - width: u32, - height: u32, - color: ColorType, - ) -> ImageResult<()> { - // TODO: convert color types internally? - let layout = match color { - ColorType::Rgb8 => PixelLayout::Rgb, - ColorType::Rgba8 => PixelLayout::Rgba, - _ => { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::WebP.into(), - UnsupportedErrorKind::Color(color.into()), - ), - )) - } - }; - - // Validate dimensions upfront to avoid panics. - if width == 0 - || height == 0 - || !SampleLayout::row_major_packed(color.channel_count(), width, height) - .fits(data.len()) - { - return Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::DimensionMismatch, - ))); - } - - // Call the native libwebp library to encode the image. - let encoder = Encoder::new(data, layout, width, height); - let encoded: WebPMemory = match self.quality.0 { - Quality::Lossless => encoder.encode_lossless(), - Quality::Lossy(quality) => encoder.encode(quality as f32), - }; - - // The simple encoding API in libwebp does not return errors. - if encoded.is_empty() { - return Err(ImageError::Encoding(EncodingError::new( - ImageFormat::WebP.into(), - "encoding failed, output empty", - ))); - } - - self.inner.write_all(&encoded)?; - Ok(()) - } -} - -impl<W: Write> ImageEncoder for WebPEncoder<W> { - fn write_image( - self, - buf: &[u8], - width: u32, - height: u32, - color_type: ColorType, - ) -> ImageResult<()> { - self.encode(buf, width, height, color_type) - } -} - -#[cfg(test)] -mod tests { - use crate::codecs::webp::{WebPEncoder, WebPQuality}; - use crate::{ColorType, ImageEncoder}; - - #[test] - fn webp_lossless_deterministic() { - // 1x1 8-bit image buffer containing a single red pixel. - let rgb: &[u8] = &[255, 0, 0]; - let rgba: &[u8] = &[255, 0, 0, 128]; - for (color, img, expected) in [ - ( - ColorType::Rgb8, - rgb, - [ - 82, 73, 70, 70, 28, 0, 0, 0, 87, 69, 66, 80, 86, 80, 56, 76, 15, 0, 0, 0, 47, - 0, 0, 0, 0, 7, 16, 253, 143, 254, 7, 34, 162, 255, 1, 0, - ], - ), - ( - ColorType::Rgba8, - rgba, - [ - 82, 73, 70, 70, 28, 0, 0, 0, 87, 69, 66, 80, 86, 80, 56, 76, 15, 0, 0, 0, 47, - 0, 0, 0, 16, 7, 16, 253, 143, 2, 6, 34, 162, 255, 1, 0, - ], - ), - ] { - // Encode it into a memory buffer. - let mut encoded_img = Vec::new(); - { - let encoder = - WebPEncoder::new_with_quality(&mut encoded_img, WebPQuality::lossless()); - encoder - .write_image(&img, 1, 1, color) - .expect("image encoding failed"); - } - - // WebP encoding should be deterministic. - assert_eq!(encoded_img, expected); - } - } - - #[derive(Debug, Clone)] - struct MockImage { - width: u32, - height: u32, - color: ColorType, - data: Vec<u8>, - } - - impl quickcheck::Arbitrary for MockImage { - fn arbitrary(g: &mut quickcheck::Gen) -> Self { - // Limit to small, non-empty images <= 512x512. - let width = u32::arbitrary(g) % 512 + 1; - let height = u32::arbitrary(g) % 512 + 1; - let (color, stride) = if bool::arbitrary(g) { - (ColorType::Rgb8, 3) - } else { - (ColorType::Rgba8, 4) - }; - let size = width * height * stride; - let data: Vec<u8> = (0..size).map(|_| u8::arbitrary(g)).collect(); - MockImage { - width, - height, - color, - data, - } - } - } - - quickcheck! { - fn fuzz_webp_valid_image(image: MockImage, quality: u8) -> bool { - // Check valid images do not panic. - let mut buffer = Vec::<u8>::new(); - for webp_quality in [WebPQuality::lossless(), WebPQuality::lossy(quality)] { - buffer.clear(); - let encoder = WebPEncoder::new_with_quality(&mut buffer, webp_quality); - if !encoder - .write_image(&image.data, image.width, image.height, image.color) - .is_ok() { - return false; - } - } - true - } - - fn fuzz_webp_no_panic(data: Vec<u8>, width: u8, height: u8, quality: u8) -> bool { - // Check random (usually invalid) parameters do not panic. - let mut buffer = Vec::<u8>::new(); - for color in [ColorType::Rgb8, ColorType::Rgba8] { - for webp_quality in [WebPQuality::lossless(), WebPQuality::lossy(quality)] { - buffer.clear(); - let encoder = WebPEncoder::new_with_quality(&mut buffer, webp_quality); - // Ignore errors. - let _ = encoder - .write_image(&data, width as u32, height as u32, color); - } - } - true - } - } -} diff --git a/vendor/image/src/codecs/webp/extended.rs b/vendor/image/src/codecs/webp/extended.rs deleted file mode 100644 index 3dc6b34..0000000 --- a/vendor/image/src/codecs/webp/extended.rs +++ /dev/null @@ -1,839 +0,0 @@ -use std::convert::TryInto; -use std::io::{self, Cursor, Error, Read}; -use std::{error, fmt}; - -use super::decoder::{ - read_chunk, read_fourcc, read_len_cursor, DecoderError::ChunkHeaderInvalid, WebPRiffChunk, -}; -use super::lossless::{LosslessDecoder, LosslessFrame}; -use super::vp8::{Frame as VP8Frame, Vp8Decoder}; -use crate::error::{DecodingError, ParameterError, ParameterErrorKind}; -use crate::image::ImageFormat; -use crate::{ - ColorType, Delay, Frame, Frames, ImageError, ImageResult, Rgb, RgbImage, Rgba, RgbaImage, -}; -use byteorder::{LittleEndian, ReadBytesExt}; - -//all errors that can occur while parsing extended chunks in a WebP file -#[derive(Debug, Clone, Copy)] -enum DecoderError { - // Some bits were invalid - InfoBitsInvalid { name: &'static str, value: u32 }, - // Alpha chunk doesn't match the frame's size - AlphaChunkSizeMismatch, - // Image is too large, either for the platform's pointer size or generally - ImageTooLarge, - // Frame would go out of the canvas - FrameOutsideImage, -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::InfoBitsInvalid { name, value } => f.write_fmt(format_args!( - "Info bits `{}` invalid, received value: {}", - name, value - )), - DecoderError::AlphaChunkSizeMismatch => { - f.write_str("Alpha chunk doesn't match the size of the frame") - } - DecoderError::ImageTooLarge => f.write_str("Image is too large to be decoded"), - DecoderError::FrameOutsideImage => { - f.write_str("Frame is too large and would go outside the image") - } - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::WebP.into(), e)) - } -} - -impl error::Error for DecoderError {} - -#[derive(Debug, Clone)] -pub(crate) struct WebPExtendedInfo { - _icc_profile: bool, - _alpha: bool, - _exif_metadata: bool, - _xmp_metadata: bool, - _animation: bool, - canvas_width: u32, - canvas_height: u32, - icc_profile: Option<Vec<u8>>, -} - -#[derive(Debug)] -enum ExtendedImageData { - Animation { - frames: Vec<AnimatedFrame>, - anim_info: WebPAnimatedInfo, - }, - Static(WebPStatic), -} - -#[derive(Debug)] -pub(crate) struct ExtendedImage { - info: WebPExtendedInfo, - image: ExtendedImageData, -} - -impl ExtendedImage { - pub(crate) fn dimensions(&self) -> (u32, u32) { - (self.info.canvas_width, self.info.canvas_height) - } - - pub(crate) fn has_animation(&self) -> bool { - self.info._animation - } - - pub(crate) fn icc_profile(&self) -> Option<Vec<u8>> { - self.info.icc_profile.clone() - } - - pub(crate) fn color_type(&self) -> ColorType { - match &self.image { - ExtendedImageData::Animation { frames, .. } => &frames[0].image, - ExtendedImageData::Static(image) => image, - } - .color_type() - } - - pub(crate) fn into_frames<'a>(self) -> Frames<'a> { - struct FrameIterator { - image: ExtendedImage, - index: usize, - canvas: RgbaImage, - } - - impl Iterator for FrameIterator { - type Item = ImageResult<Frame>; - - fn next(&mut self) -> Option<Self::Item> { - if let ExtendedImageData::Animation { frames, anim_info } = &self.image.image { - let frame = frames.get(self.index); - match frame { - Some(anim_image) => { - self.index += 1; - ExtendedImage::draw_subimage( - &mut self.canvas, - anim_image, - anim_info.background_color, - ) - } - None => None, - } - } else { - None - } - } - } - - let width = self.info.canvas_width; - let height = self.info.canvas_height; - let background_color = - if let ExtendedImageData::Animation { ref anim_info, .. } = self.image { - anim_info.background_color - } else { - Rgba([0, 0, 0, 0]) - }; - - let frame_iter = FrameIterator { - image: self, - index: 0, - canvas: RgbaImage::from_pixel(width, height, background_color), - }; - - Frames::new(Box::new(frame_iter)) - } - - pub(crate) fn read_extended_chunks<R: Read>( - reader: &mut R, - mut info: WebPExtendedInfo, - ) -> ImageResult<ExtendedImage> { - let mut anim_info: Option<WebPAnimatedInfo> = None; - let mut anim_frames: Vec<AnimatedFrame> = Vec::new(); - let mut static_frame: Option<WebPStatic> = None; - //go until end of file and while chunk headers are valid - while let Some((mut cursor, chunk)) = read_extended_chunk(reader)? { - match chunk { - WebPRiffChunk::EXIF | WebPRiffChunk::XMP => { - //ignore these chunks - } - WebPRiffChunk::ANIM => { - if anim_info.is_none() { - anim_info = Some(Self::read_anim_info(&mut cursor)?); - } - } - WebPRiffChunk::ANMF => { - let frame = read_anim_frame(cursor, info.canvas_width, info.canvas_height)?; - anim_frames.push(frame); - } - WebPRiffChunk::ALPH => { - if static_frame.is_none() { - let alpha_chunk = - read_alpha_chunk(&mut cursor, info.canvas_width, info.canvas_height)?; - - let vp8_frame = read_lossy_with_chunk(reader)?; - - let img = WebPStatic::from_alpha_lossy(alpha_chunk, vp8_frame)?; - - static_frame = Some(img); - } - } - WebPRiffChunk::ICCP => { - let mut icc_profile = Vec::new(); - cursor.read_to_end(&mut icc_profile)?; - info.icc_profile = Some(icc_profile); - } - WebPRiffChunk::VP8 => { - if static_frame.is_none() { - let vp8_frame = read_lossy(cursor)?; - - let img = WebPStatic::from_lossy(vp8_frame)?; - - static_frame = Some(img); - } - } - WebPRiffChunk::VP8L => { - if static_frame.is_none() { - let mut lossless_decoder = LosslessDecoder::new(cursor); - let frame = lossless_decoder.decode_frame()?; - let image = WebPStatic::Lossless(frame.clone()); - - static_frame = Some(image); - } - } - _ => return Err(ChunkHeaderInvalid(chunk.to_fourcc()).into()), - } - } - - let image = if let Some(info) = anim_info { - if anim_frames.is_empty() { - return Err(ImageError::IoError(Error::from( - io::ErrorKind::UnexpectedEof, - ))); - } - ExtendedImageData::Animation { - frames: anim_frames, - anim_info: info, - } - } else if let Some(frame) = static_frame { - ExtendedImageData::Static(frame) - } else { - //reached end of file too early before image data was reached - return Err(ImageError::IoError(Error::from( - io::ErrorKind::UnexpectedEof, - ))); - }; - - let image = ExtendedImage { image, info }; - - Ok(image) - } - - fn read_anim_info<R: Read>(reader: &mut R) -> ImageResult<WebPAnimatedInfo> { - let mut colors: [u8; 4] = [0; 4]; - reader.read_exact(&mut colors)?; - - //background color is [blue, green, red, alpha] - let background_color = Rgba([colors[2], colors[1], colors[0], colors[3]]); - - let loop_count = reader.read_u16::<LittleEndian>()?; - - let info = WebPAnimatedInfo { - background_color, - _loop_count: loop_count, - }; - - Ok(info) - } - - fn draw_subimage( - canvas: &mut RgbaImage, - anim_image: &AnimatedFrame, - background_color: Rgba<u8>, - ) -> Option<ImageResult<Frame>> { - let mut buffer = vec![0; anim_image.image.get_buf_size()]; - anim_image.image.fill_buf(&mut buffer); - let has_alpha = anim_image.image.has_alpha(); - let pixel_len: u32 = anim_image.image.color_type().bytes_per_pixel().into(); - - 'x: for x in 0..anim_image.width { - for y in 0..anim_image.height { - let canvas_index: (u32, u32) = (x + anim_image.offset_x, y + anim_image.offset_y); - // Negative offsets are not possible due to unsigned ints - // If we go out of bounds by height, still continue by x - if canvas_index.1 >= canvas.height() { - continue 'x; - } - // If we go out of bounds by width, it doesn't make sense to continue at all - if canvas_index.0 >= canvas.width() { - break 'x; - } - let index: usize = ((y * anim_image.width + x) * pixel_len).try_into().unwrap(); - canvas[canvas_index] = if anim_image.use_alpha_blending && has_alpha { - let buffer: [u8; 4] = buffer[index..][..4].try_into().unwrap(); - ExtendedImage::do_alpha_blending(buffer, canvas[canvas_index]) - } else { - Rgba([ - buffer[index], - buffer[index + 1], - buffer[index + 2], - if has_alpha { buffer[index + 3] } else { 255 }, - ]) - }; - } - } - - let delay = Delay::from_numer_denom_ms(anim_image.duration, 1); - let img = canvas.clone(); - let frame = Frame::from_parts(img, 0, 0, delay); - - if anim_image.dispose { - for x in 0..anim_image.width { - for y in 0..anim_image.height { - let canvas_index = (x + anim_image.offset_x, y + anim_image.offset_y); - canvas[canvas_index] = background_color; - } - } - } - - Some(Ok(frame)) - } - - fn do_alpha_blending(buffer: [u8; 4], canvas: Rgba<u8>) -> Rgba<u8> { - let canvas_alpha = f64::from(canvas[3]); - let buffer_alpha = f64::from(buffer[3]); - let blend_alpha_f64 = buffer_alpha + canvas_alpha * (1.0 - buffer_alpha / 255.0); - //value should be between 0 and 255, this truncates the fractional part - let blend_alpha: u8 = blend_alpha_f64 as u8; - - let blend_rgb: [u8; 3] = if blend_alpha == 0 { - [0, 0, 0] - } else { - let mut rgb = [0u8; 3]; - for i in 0..3 { - let canvas_f64 = f64::from(canvas[i]); - let buffer_f64 = f64::from(buffer[i]); - - let val = (buffer_f64 * buffer_alpha - + canvas_f64 * canvas_alpha * (1.0 - buffer_alpha / 255.0)) - / blend_alpha_f64; - //value should be between 0 and 255, this truncates the fractional part - rgb[i] = val as u8; - } - - rgb - }; - - Rgba([blend_rgb[0], blend_rgb[1], blend_rgb[2], blend_alpha]) - } - - pub(crate) fn fill_buf(&self, buf: &mut [u8]) { - match &self.image { - // will always have at least one frame - ExtendedImageData::Animation { frames, anim_info } => { - let first_frame = &frames[0]; - let (canvas_width, canvas_height) = self.dimensions(); - if canvas_width == first_frame.width && canvas_height == first_frame.height { - first_frame.image.fill_buf(buf); - } else { - let bg_color = match &self.info._alpha { - true => Rgba::from([0, 0, 0, 0]), - false => anim_info.background_color, - }; - let mut canvas = RgbaImage::from_pixel(canvas_width, canvas_height, bg_color); - let _ = ExtendedImage::draw_subimage(&mut canvas, first_frame, bg_color) - .unwrap() - .unwrap(); - buf.copy_from_slice(canvas.into_raw().as_slice()); - } - } - ExtendedImageData::Static(image) => { - image.fill_buf(buf); - } - } - } - - pub(crate) fn get_buf_size(&self) -> usize { - match &self.image { - // will always have at least one frame - ExtendedImageData::Animation { frames, .. } => &frames[0].image, - ExtendedImageData::Static(image) => image, - } - .get_buf_size() - } - - pub(crate) fn set_background_color(&mut self, color: Rgba<u8>) -> ImageResult<()> { - match &mut self.image { - ExtendedImageData::Animation { anim_info, .. } => { - anim_info.background_color = color; - Ok(()) - } - _ => Err(ImageError::Parameter(ParameterError::from_kind( - ParameterErrorKind::Generic( - "Background color can only be set on animated webp".to_owned(), - ), - ))), - } - } -} - -#[derive(Debug)] -enum WebPStatic { - LossyWithAlpha(RgbaImage), - LossyWithoutAlpha(RgbImage), - Lossless(LosslessFrame), -} - -impl WebPStatic { - pub(crate) fn from_alpha_lossy( - alpha: AlphaChunk, - vp8_frame: VP8Frame, - ) -> ImageResult<WebPStatic> { - if alpha.data.len() != usize::from(vp8_frame.width) * usize::from(vp8_frame.height) { - return Err(DecoderError::AlphaChunkSizeMismatch.into()); - } - - let size = usize::from(vp8_frame.width).checked_mul(usize::from(vp8_frame.height) * 4); - let mut image_vec = match size { - Some(size) => vec![0u8; size], - None => return Err(DecoderError::ImageTooLarge.into()), - }; - - vp8_frame.fill_rgba(&mut image_vec); - - for y in 0..vp8_frame.height { - for x in 0..vp8_frame.width { - let predictor: u8 = WebPStatic::get_predictor( - x.into(), - y.into(), - vp8_frame.width.into(), - alpha.filtering_method, - &image_vec, - ); - let predictor = u16::from(predictor); - - let alpha_index = usize::from(y) * usize::from(vp8_frame.width) + usize::from(x); - let alpha_val = alpha.data[alpha_index]; - let alpha: u8 = ((predictor + u16::from(alpha_val)) % 256) - .try_into() - .unwrap(); - - let alpha_index = alpha_index * 4 + 3; - image_vec[alpha_index] = alpha; - } - } - - let image = RgbaImage::from_vec(vp8_frame.width.into(), vp8_frame.height.into(), image_vec) - .unwrap(); - - Ok(WebPStatic::LossyWithAlpha(image)) - } - - fn get_predictor( - x: usize, - y: usize, - width: usize, - filtering_method: FilteringMethod, - image_slice: &[u8], - ) -> u8 { - match filtering_method { - FilteringMethod::None => 0, - FilteringMethod::Horizontal => { - if x == 0 && y == 0 { - 0 - } else if x == 0 { - let index = (y - 1) * width + x; - image_slice[index * 4 + 3] - } else { - let index = y * width + x - 1; - image_slice[index * 4 + 3] - } - } - FilteringMethod::Vertical => { - if x == 0 && y == 0 { - 0 - } else if y == 0 { - let index = y * width + x - 1; - image_slice[index * 4 + 3] - } else { - let index = (y - 1) * width + x; - image_slice[index * 4 + 3] - } - } - FilteringMethod::Gradient => { - let (left, top, top_left) = match (x, y) { - (0, 0) => (0, 0, 0), - (0, y) => { - let above_index = (y - 1) * width + x; - let val = image_slice[above_index * 4 + 3]; - (val, val, val) - } - (x, 0) => { - let before_index = y * width + x - 1; - let val = image_slice[before_index * 4 + 3]; - (val, val, val) - } - (x, y) => { - let left_index = y * width + x - 1; - let left = image_slice[left_index * 4 + 3]; - let top_index = (y - 1) * width + x; - let top = image_slice[top_index * 4 + 3]; - let top_left_index = (y - 1) * width + x - 1; - let top_left = image_slice[top_left_index * 4 + 3]; - - (left, top, top_left) - } - }; - - let combination = i16::from(left) + i16::from(top) - i16::from(top_left); - i16::clamp(combination, 0, 255).try_into().unwrap() - } - } - } - - pub(crate) fn from_lossy(vp8_frame: VP8Frame) -> ImageResult<WebPStatic> { - let mut image = RgbImage::from_pixel( - vp8_frame.width.into(), - vp8_frame.height.into(), - Rgb([0, 0, 0]), - ); - - vp8_frame.fill_rgb(&mut image); - - Ok(WebPStatic::LossyWithoutAlpha(image)) - } - - pub(crate) fn fill_buf(&self, buf: &mut [u8]) { - match self { - WebPStatic::LossyWithAlpha(image) => { - buf.copy_from_slice(image); - } - WebPStatic::LossyWithoutAlpha(image) => { - buf.copy_from_slice(image); - } - WebPStatic::Lossless(lossless) => { - lossless.fill_rgba(buf); - } - } - } - - pub(crate) fn get_buf_size(&self) -> usize { - match self { - WebPStatic::LossyWithAlpha(rgb_image) => rgb_image.len(), - WebPStatic::LossyWithoutAlpha(rgba_image) => rgba_image.len(), - WebPStatic::Lossless(lossless) => lossless.get_buf_size(), - } - } - - pub(crate) fn color_type(&self) -> ColorType { - if self.has_alpha() { - ColorType::Rgba8 - } else { - ColorType::Rgb8 - } - } - - pub(crate) fn has_alpha(&self) -> bool { - match self { - Self::LossyWithAlpha(..) | Self::Lossless(..) => true, - Self::LossyWithoutAlpha(..) => false, - } - } -} - -#[derive(Debug)] -struct WebPAnimatedInfo { - background_color: Rgba<u8>, - _loop_count: u16, -} - -#[derive(Debug)] -struct AnimatedFrame { - offset_x: u32, - offset_y: u32, - width: u32, - height: u32, - duration: u32, - use_alpha_blending: bool, - dispose: bool, - image: WebPStatic, -} - -/// Reads a chunk, but silently ignores unknown chunks at the end of a file -fn read_extended_chunk<R>(r: &mut R) -> ImageResult<Option<(Cursor<Vec<u8>>, WebPRiffChunk)>> -where - R: Read, -{ - let mut unknown_chunk = Ok(()); - - while let Some(chunk) = read_fourcc(r)? { - let cursor = read_len_cursor(r)?; - match chunk { - Ok(chunk) => return unknown_chunk.and(Ok(Some((cursor, chunk)))), - Err(err) => unknown_chunk = unknown_chunk.and(Err(err)), - } - } - - Ok(None) -} - -pub(crate) fn read_extended_header<R: Read>(reader: &mut R) -> ImageResult<WebPExtendedInfo> { - let chunk_flags = reader.read_u8()?; - - let reserved_first = chunk_flags & 0b11000000; - let icc_profile = chunk_flags & 0b00100000 != 0; - let alpha = chunk_flags & 0b00010000 != 0; - let exif_metadata = chunk_flags & 0b00001000 != 0; - let xmp_metadata = chunk_flags & 0b00000100 != 0; - let animation = chunk_flags & 0b00000010 != 0; - let reserved_second = chunk_flags & 0b00000001; - - let reserved_third = read_3_bytes(reader)?; - - if reserved_first != 0 || reserved_second != 0 || reserved_third != 0 { - let value: u32 = if reserved_first != 0 { - reserved_first.into() - } else if reserved_second != 0 { - reserved_second.into() - } else { - reserved_third - }; - return Err(DecoderError::InfoBitsInvalid { - name: "reserved", - value, - } - .into()); - } - - let canvas_width = read_3_bytes(reader)? + 1; - let canvas_height = read_3_bytes(reader)? + 1; - - //product of canvas dimensions cannot be larger than u32 max - if u32::checked_mul(canvas_width, canvas_height).is_none() { - return Err(DecoderError::ImageTooLarge.into()); - } - - let info = WebPExtendedInfo { - _icc_profile: icc_profile, - _alpha: alpha, - _exif_metadata: exif_metadata, - _xmp_metadata: xmp_metadata, - _animation: animation, - canvas_width, - canvas_height, - icc_profile: None, - }; - - Ok(info) -} - -fn read_anim_frame<R: Read>( - mut reader: R, - canvas_width: u32, - canvas_height: u32, -) -> ImageResult<AnimatedFrame> { - //offsets for the frames are twice the values - let frame_x = read_3_bytes(&mut reader)? * 2; - let frame_y = read_3_bytes(&mut reader)? * 2; - - let frame_width = read_3_bytes(&mut reader)? + 1; - let frame_height = read_3_bytes(&mut reader)? + 1; - - if frame_x + frame_width > canvas_width || frame_y + frame_height > canvas_height { - return Err(DecoderError::FrameOutsideImage.into()); - } - - let duration = read_3_bytes(&mut reader)?; - - let frame_info = reader.read_u8()?; - let reserved = frame_info & 0b11111100; - if reserved != 0 { - return Err(DecoderError::InfoBitsInvalid { - name: "reserved", - value: reserved.into(), - } - .into()); - } - let use_alpha_blending = frame_info & 0b00000010 == 0; - let dispose = frame_info & 0b00000001 != 0; - - //read normal bitstream now - let static_image = read_image(&mut reader, frame_width, frame_height)?; - - let frame = AnimatedFrame { - offset_x: frame_x, - offset_y: frame_y, - width: frame_width, - height: frame_height, - duration, - use_alpha_blending, - dispose, - image: static_image, - }; - - Ok(frame) -} - -fn read_3_bytes<R: Read>(reader: &mut R) -> ImageResult<u32> { - let mut buffer: [u8; 3] = [0; 3]; - reader.read_exact(&mut buffer)?; - let value: u32 = - (u32::from(buffer[2]) << 16) | (u32::from(buffer[1]) << 8) | u32::from(buffer[0]); - Ok(value) -} - -fn read_lossy_with_chunk<R: Read>(reader: &mut R) -> ImageResult<VP8Frame> { - let (cursor, chunk) = - read_chunk(reader)?.ok_or_else(|| Error::from(io::ErrorKind::UnexpectedEof))?; - - if chunk != WebPRiffChunk::VP8 { - return Err(ChunkHeaderInvalid(chunk.to_fourcc()).into()); - } - - read_lossy(cursor) -} - -fn read_lossy(cursor: Cursor<Vec<u8>>) -> ImageResult<VP8Frame> { - let mut vp8_decoder = Vp8Decoder::new(cursor); - let frame = vp8_decoder.decode_frame()?; - - Ok(frame.clone()) -} - -fn read_image<R: Read>(reader: &mut R, width: u32, height: u32) -> ImageResult<WebPStatic> { - let chunk = read_chunk(reader)?; - - match chunk { - Some((cursor, WebPRiffChunk::VP8)) => { - let mut vp8_decoder = Vp8Decoder::new(cursor); - let frame = vp8_decoder.decode_frame()?; - - let img = WebPStatic::from_lossy(frame.clone())?; - - Ok(img) - } - Some((cursor, WebPRiffChunk::VP8L)) => { - let mut lossless_decoder = LosslessDecoder::new(cursor); - let frame = lossless_decoder.decode_frame()?; - - let img = WebPStatic::Lossless(frame.clone()); - - Ok(img) - } - Some((mut cursor, WebPRiffChunk::ALPH)) => { - let alpha_chunk = read_alpha_chunk(&mut cursor, width, height)?; - - let vp8_frame = read_lossy_with_chunk(reader)?; - - let img = WebPStatic::from_alpha_lossy(alpha_chunk, vp8_frame)?; - - Ok(img) - } - None => Err(ImageError::IoError(Error::from( - io::ErrorKind::UnexpectedEof, - ))), - Some((_, chunk)) => Err(ChunkHeaderInvalid(chunk.to_fourcc()).into()), - } -} - -#[derive(Debug)] -struct AlphaChunk { - _preprocessing: bool, - filtering_method: FilteringMethod, - data: Vec<u8>, -} - -#[derive(Debug, Copy, Clone)] -enum FilteringMethod { - None, - Horizontal, - Vertical, - Gradient, -} - -fn read_alpha_chunk<R: Read>(reader: &mut R, width: u32, height: u32) -> ImageResult<AlphaChunk> { - let info_byte = reader.read_u8()?; - - let reserved = info_byte & 0b11000000; - let preprocessing = (info_byte & 0b00110000) >> 4; - let filtering = (info_byte & 0b00001100) >> 2; - let compression = info_byte & 0b00000011; - - if reserved != 0 { - return Err(DecoderError::InfoBitsInvalid { - name: "reserved", - value: reserved.into(), - } - .into()); - } - - let preprocessing = match preprocessing { - 0 => false, - 1 => true, - _ => { - return Err(DecoderError::InfoBitsInvalid { - name: "reserved", - value: preprocessing.into(), - } - .into()) - } - }; - - let filtering_method = match filtering { - 0 => FilteringMethod::None, - 1 => FilteringMethod::Horizontal, - 2 => FilteringMethod::Vertical, - 3 => FilteringMethod::Gradient, - _ => unreachable!(), - }; - - let lossless_compression = match compression { - 0 => false, - 1 => true, - _ => { - return Err(DecoderError::InfoBitsInvalid { - name: "lossless compression", - value: compression.into(), - } - .into()) - } - }; - - let mut framedata = Vec::new(); - reader.read_to_end(&mut framedata)?; - - let data = if lossless_compression { - let cursor = io::Cursor::new(framedata); - - let mut decoder = LosslessDecoder::new(cursor); - //this is a potential problem for large images; would require rewriting lossless decoder to use u32 for width and height - let width: u16 = width - .try_into() - .map_err(|_| ImageError::from(DecoderError::ImageTooLarge))?; - let height: u16 = height - .try_into() - .map_err(|_| ImageError::from(DecoderError::ImageTooLarge))?; - let frame = decoder.decode_frame_implicit_dims(width, height)?; - - let mut data = vec![0u8; usize::from(width) * usize::from(height)]; - - frame.fill_green(&mut data); - - data - } else { - framedata - }; - - let chunk = AlphaChunk { - _preprocessing: preprocessing, - filtering_method, - data, - }; - - Ok(chunk) -} diff --git a/vendor/image/src/codecs/webp/huffman.rs b/vendor/image/src/codecs/webp/huffman.rs deleted file mode 100644 index 986eee6..0000000 --- a/vendor/image/src/codecs/webp/huffman.rs +++ /dev/null @@ -1,202 +0,0 @@ -use std::convert::TryInto; - -use super::lossless::BitReader; -use super::lossless::DecoderError; -use crate::ImageResult; - -/// Rudimentary utility for reading Canonical Huffman Codes. -/// Based off https://github.com/webmproject/libwebp/blob/7f8472a610b61ec780ef0a8873cd954ac512a505/src/utils/huffman.c -/// - -const MAX_ALLOWED_CODE_LENGTH: usize = 15; - -#[derive(Clone, Copy, Debug, PartialEq, Eq)] -enum HuffmanTreeNode { - Branch(usize), //offset in vector to children - Leaf(u16), //symbol stored in leaf - Empty, -} - -/// Huffman tree -#[derive(Clone, Debug, Default)] -pub(crate) struct HuffmanTree { - tree: Vec<HuffmanTreeNode>, - max_nodes: usize, - num_nodes: usize, -} - -impl HuffmanTree { - fn is_full(&self) -> bool { - self.num_nodes == self.max_nodes - } - - /// Turns a node from empty into a branch and assigns its children - fn assign_children(&mut self, node_index: usize) -> usize { - let offset_index = self.num_nodes - node_index; - self.tree[node_index] = HuffmanTreeNode::Branch(offset_index); - self.num_nodes += 2; - - offset_index - } - - /// Init a huffman tree - fn init(num_leaves: usize) -> ImageResult<HuffmanTree> { - if num_leaves == 0 { - return Err(DecoderError::HuffmanError.into()); - } - - let max_nodes = 2 * num_leaves - 1; - let tree = vec![HuffmanTreeNode::Empty; max_nodes]; - let num_nodes = 1; - - let tree = HuffmanTree { - tree, - max_nodes, - num_nodes, - }; - - Ok(tree) - } - - /// Converts code lengths to codes - fn code_lengths_to_codes(code_lengths: &[u16]) -> ImageResult<Vec<Option<u16>>> { - let max_code_length = *code_lengths - .iter() - .reduce(|a, b| if a >= b { a } else { b }) - .unwrap(); - - if max_code_length > MAX_ALLOWED_CODE_LENGTH.try_into().unwrap() { - return Err(DecoderError::HuffmanError.into()); - } - - let mut code_length_hist = vec![0; MAX_ALLOWED_CODE_LENGTH + 1]; - - for &length in code_lengths.iter() { - code_length_hist[usize::from(length)] += 1; - } - - code_length_hist[0] = 0; - - let mut curr_code = 0; - let mut next_codes = vec![None; MAX_ALLOWED_CODE_LENGTH + 1]; - - for code_len in 1..=usize::from(max_code_length) { - curr_code = (curr_code + code_length_hist[code_len - 1]) << 1; - next_codes[code_len] = Some(curr_code); - } - - let mut huff_codes = vec![None; code_lengths.len()]; - - for (symbol, &length) in code_lengths.iter().enumerate() { - let length = usize::from(length); - if length > 0 { - huff_codes[symbol] = next_codes[length]; - if let Some(value) = next_codes[length].as_mut() { - *value += 1; - } - } else { - huff_codes[symbol] = None; - } - } - - Ok(huff_codes) - } - - /// Adds a symbol to a huffman tree - fn add_symbol(&mut self, symbol: u16, code: u16, code_length: u16) -> ImageResult<()> { - let mut node_index = 0; - let code = usize::from(code); - - for length in (0..code_length).rev() { - if node_index >= self.max_nodes { - return Err(DecoderError::HuffmanError.into()); - } - - let node = self.tree[node_index]; - - let offset = match node { - HuffmanTreeNode::Empty => { - if self.is_full() { - return Err(DecoderError::HuffmanError.into()); - } - self.assign_children(node_index) - } - HuffmanTreeNode::Leaf(_) => return Err(DecoderError::HuffmanError.into()), - HuffmanTreeNode::Branch(offset) => offset, - }; - - node_index += offset + ((code >> length) & 1); - } - - match self.tree[node_index] { - HuffmanTreeNode::Empty => self.tree[node_index] = HuffmanTreeNode::Leaf(symbol), - HuffmanTreeNode::Leaf(_) => return Err(DecoderError::HuffmanError.into()), - HuffmanTreeNode::Branch(_offset) => return Err(DecoderError::HuffmanError.into()), - } - - Ok(()) - } - - /// Builds a tree implicitly, just from code lengths - pub(crate) fn build_implicit(code_lengths: Vec<u16>) -> ImageResult<HuffmanTree> { - let mut num_symbols = 0; - let mut root_symbol = 0; - - for (symbol, length) in code_lengths.iter().enumerate() { - if *length > 0 { - num_symbols += 1; - root_symbol = symbol.try_into().unwrap(); - } - } - - let mut tree = HuffmanTree::init(num_symbols)?; - - if num_symbols == 1 { - tree.add_symbol(root_symbol, 0, 0)?; - } else { - let codes = HuffmanTree::code_lengths_to_codes(&code_lengths)?; - - for (symbol, &length) in code_lengths.iter().enumerate() { - if length > 0 && codes[symbol].is_some() { - tree.add_symbol(symbol.try_into().unwrap(), codes[symbol].unwrap(), length)?; - } - } - } - - Ok(tree) - } - - /// Builds a tree explicitly from lengths, codes and symbols - pub(crate) fn build_explicit( - code_lengths: Vec<u16>, - codes: Vec<u16>, - symbols: Vec<u16>, - ) -> ImageResult<HuffmanTree> { - let mut tree = HuffmanTree::init(symbols.len())?; - - for i in 0..symbols.len() { - tree.add_symbol(symbols[i], codes[i], code_lengths[i])?; - } - - Ok(tree) - } - - /// Reads a symbol using the bitstream - pub(crate) fn read_symbol(&self, bit_reader: &mut BitReader) -> ImageResult<u16> { - let mut index = 0; - let mut node = self.tree[index]; - - while let HuffmanTreeNode::Branch(children_offset) = node { - index += children_offset + bit_reader.read_bits::<usize>(1)?; - node = self.tree[index]; - } - - let symbol = match node { - HuffmanTreeNode::Branch(_) => unreachable!(), - HuffmanTreeNode::Empty => return Err(DecoderError::HuffmanError.into()), - HuffmanTreeNode::Leaf(symbol) => symbol, - }; - - Ok(symbol) - } -} diff --git a/vendor/image/src/codecs/webp/loop_filter.rs b/vendor/image/src/codecs/webp/loop_filter.rs deleted file mode 100644 index 312059f..0000000 --- a/vendor/image/src/codecs/webp/loop_filter.rs +++ /dev/null @@ -1,147 +0,0 @@ -//! Does loop filtering on webp lossy images - -use crate::utils::clamp; - -#[inline] -fn c(val: i32) -> i32 { - clamp(val, -128, 127) -} - -//unsigned to signed -#[inline] -fn u2s(val: u8) -> i32 { - i32::from(val) - 128 -} - -//signed to unsigned -#[inline] -fn s2u(val: i32) -> u8 { - (c(val) + 128) as u8 -} - -#[inline] -fn diff(val1: u8, val2: u8) -> u8 { - if val1 > val2 { - val1 - val2 - } else { - val2 - val1 - } -} - -//15.2 -fn common_adjust(use_outer_taps: bool, pixels: &mut [u8], point: usize, stride: usize) -> i32 { - let p1 = u2s(pixels[point - 2 * stride]); - let p0 = u2s(pixels[point - stride]); - let q0 = u2s(pixels[point]); - let q1 = u2s(pixels[point + stride]); - - //value for the outer 2 pixels - let outer = if use_outer_taps { c(p1 - q1) } else { 0 }; - - let mut a = c(outer + 3 * (q0 - p0)); - - let b = (c(a + 3)) >> 3; - - a = (c(a + 4)) >> 3; - - pixels[point] = s2u(q0 - a); - pixels[point - stride] = s2u(p0 + b); - - a -} - -fn simple_threshold(filter_limit: i32, pixels: &[u8], point: usize, stride: usize) -> bool { - i32::from(diff(pixels[point - stride], pixels[point])) * 2 - + i32::from(diff(pixels[point - 2 * stride], pixels[point + stride])) / 2 - <= filter_limit -} - -fn should_filter( - interior_limit: u8, - edge_limit: u8, - pixels: &[u8], - point: usize, - stride: usize, -) -> bool { - simple_threshold(i32::from(edge_limit), pixels, point, stride) - && diff(pixels[point - 4 * stride], pixels[point - 3 * stride]) <= interior_limit - && diff(pixels[point - 3 * stride], pixels[point - 2 * stride]) <= interior_limit - && diff(pixels[point - 2 * stride], pixels[point - stride]) <= interior_limit - && diff(pixels[point + 3 * stride], pixels[point + 2 * stride]) <= interior_limit - && diff(pixels[point + 2 * stride], pixels[point + stride]) <= interior_limit - && diff(pixels[point + stride], pixels[point]) <= interior_limit -} - -fn high_edge_variance(threshold: u8, pixels: &[u8], point: usize, stride: usize) -> bool { - diff(pixels[point - 2 * stride], pixels[point - stride]) > threshold - || diff(pixels[point + stride], pixels[point]) > threshold -} - -//simple filter -//effects 4 pixels on an edge(2 each side) -pub(crate) fn simple_segment(edge_limit: u8, pixels: &mut [u8], point: usize, stride: usize) { - if simple_threshold(i32::from(edge_limit), pixels, point, stride) { - common_adjust(true, pixels, point, stride); - } -} - -//normal filter -//works on the 8 pixels on the edges between subblocks inside a macroblock -pub(crate) fn subblock_filter( - hev_threshold: u8, - interior_limit: u8, - edge_limit: u8, - pixels: &mut [u8], - point: usize, - stride: usize, -) { - if should_filter(interior_limit, edge_limit, pixels, point, stride) { - let hv = high_edge_variance(hev_threshold, pixels, point, stride); - - let a = (common_adjust(hv, pixels, point, stride) + 1) >> 1; - - if !hv { - pixels[point + stride] = s2u(u2s(pixels[point + stride]) - a); - pixels[point - 2 * stride] = s2u(u2s(pixels[point - 2 * stride]) - a); - } - } -} - -//normal filter -//works on the 8 pixels on the edges between macroblocks -pub(crate) fn macroblock_filter( - hev_threshold: u8, - interior_limit: u8, - edge_limit: u8, - pixels: &mut [u8], - point: usize, - stride: usize, -) { - let mut spixels = [0i32; 8]; - for i in 0..8 { - spixels[i] = u2s(pixels[point + i * stride - 4 * stride]); - } - - if should_filter(interior_limit, edge_limit, pixels, point, stride) { - if !high_edge_variance(hev_threshold, pixels, point, stride) { - let w = c(c(spixels[2] - spixels[5]) + 3 * (spixels[4] - spixels[3])); - - let mut a = c((27 * w + 63) >> 7); - - pixels[point] = s2u(spixels[4] - a); - pixels[point - stride] = s2u(spixels[3] + a); - - a = c((18 * w + 63) >> 7); - - pixels[point + stride] = s2u(spixels[5] - a); - pixels[point - 2 * stride] = s2u(spixels[2] + a); - - a = c((9 * w + 63) >> 7); - - pixels[point + 2 * stride] = s2u(spixels[6] - a); - pixels[point - 3 * stride] = s2u(spixels[1] + a); - } else { - common_adjust(true, pixels, point, stride); - } - } -} diff --git a/vendor/image/src/codecs/webp/lossless.rs b/vendor/image/src/codecs/webp/lossless.rs deleted file mode 100644 index 7271eda..0000000 --- a/vendor/image/src/codecs/webp/lossless.rs +++ /dev/null @@ -1,783 +0,0 @@ -//! Decoding of lossless WebP images -//! -//! [Lossless spec](https://developers.google.com/speed/webp/docs/webp_lossless_bitstream_specification) -//! - -use std::{ - convert::TryFrom, - convert::TryInto, - error, fmt, - io::Read, - ops::{AddAssign, Shl}, -}; - -use byteorder::ReadBytesExt; - -use crate::{error::DecodingError, ImageError, ImageFormat, ImageResult}; - -use super::huffman::HuffmanTree; -use super::lossless_transform::{add_pixels, TransformType}; - -const CODE_LENGTH_CODES: usize = 19; -const CODE_LENGTH_CODE_ORDER: [usize; CODE_LENGTH_CODES] = [ - 17, 18, 0, 1, 2, 3, 4, 5, 16, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, -]; - -#[rustfmt::skip] -const DISTANCE_MAP: [(i8, i8); 120] = [ - (0, 1), (1, 0), (1, 1), (-1, 1), (0, 2), (2, 0), (1, 2), (-1, 2), - (2, 1), (-2, 1), (2, 2), (-2, 2), (0, 3), (3, 0), (1, 3), (-1, 3), - (3, 1), (-3, 1), (2, 3), (-2, 3), (3, 2), (-3, 2), (0, 4), (4, 0), - (1, 4), (-1, 4), (4, 1), (-4, 1), (3, 3), (-3, 3), (2, 4), (-2, 4), - (4, 2), (-4, 2), (0, 5), (3, 4), (-3, 4), (4, 3), (-4, 3), (5, 0), - (1, 5), (-1, 5), (5, 1), (-5, 1), (2, 5), (-2, 5), (5, 2), (-5, 2), - (4, 4), (-4, 4), (3, 5), (-3, 5), (5, 3), (-5, 3), (0, 6), (6, 0), - (1, 6), (-1, 6), (6, 1), (-6, 1), (2, 6), (-2, 6), (6, 2), (-6, 2), - (4, 5), (-4, 5), (5, 4), (-5, 4), (3, 6), (-3, 6), (6, 3), (-6, 3), - (0, 7), (7, 0), (1, 7), (-1, 7), (5, 5), (-5, 5), (7, 1), (-7, 1), - (4, 6), (-4, 6), (6, 4), (-6, 4), (2, 7), (-2, 7), (7, 2), (-7, 2), - (3, 7), (-3, 7), (7, 3), (-7, 3), (5, 6), (-5, 6), (6, 5), (-6, 5), - (8, 0), (4, 7), (-4, 7), (7, 4), (-7, 4), (8, 1), (8, 2), (6, 6), - (-6, 6), (8, 3), (5, 7), (-5, 7), (7, 5), (-7, 5), (8, 4), (6, 7), - (-6, 7), (7, 6), (-7, 6), (8, 5), (7, 7), (-7, 7), (8, 6), (8, 7) -]; - -const GREEN: usize = 0; -const RED: usize = 1; -const BLUE: usize = 2; -const ALPHA: usize = 3; -const DIST: usize = 4; - -const HUFFMAN_CODES_PER_META_CODE: usize = 5; - -type HuffmanCodeGroup = [HuffmanTree; HUFFMAN_CODES_PER_META_CODE]; - -const ALPHABET_SIZE: [u16; HUFFMAN_CODES_PER_META_CODE] = [256 + 24, 256, 256, 256, 40]; - -#[inline] -pub(crate) fn subsample_size(size: u16, bits: u8) -> u16 { - ((u32::from(size) + (1u32 << bits) - 1) >> bits) - .try_into() - .unwrap() -} - -#[derive(Debug, Clone, Copy)] -pub(crate) enum DecoderError { - /// Signature of 0x2f not found - LosslessSignatureInvalid(u8), - /// Version Number must be 0 - VersionNumberInvalid(u8), - - /// - InvalidColorCacheBits(u8), - - HuffmanError, - - BitStreamError, - - TransformError, -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::LosslessSignatureInvalid(sig) => { - f.write_fmt(format_args!("Invalid lossless signature: {}", sig)) - } - DecoderError::VersionNumberInvalid(num) => { - f.write_fmt(format_args!("Invalid version number: {}", num)) - } - DecoderError::InvalidColorCacheBits(num) => f.write_fmt(format_args!( - "Invalid color cache(must be between 1-11): {}", - num - )), - DecoderError::HuffmanError => f.write_fmt(format_args!("Error building Huffman Tree")), - DecoderError::BitStreamError => { - f.write_fmt(format_args!("Error while reading bitstream")) - } - DecoderError::TransformError => { - f.write_fmt(format_args!("Error while reading or writing transforms")) - } - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::WebP.into(), e)) - } -} - -impl error::Error for DecoderError {} - -const NUM_TRANSFORM_TYPES: usize = 4; - -//Decodes lossless WebP images -#[derive(Debug)] -pub(crate) struct LosslessDecoder<R> { - r: R, - bit_reader: BitReader, - frame: LosslessFrame, - transforms: [Option<TransformType>; NUM_TRANSFORM_TYPES], - transform_order: Vec<u8>, -} - -impl<R: Read> LosslessDecoder<R> { - /// Create a new decoder - pub(crate) fn new(r: R) -> LosslessDecoder<R> { - LosslessDecoder { - r, - bit_reader: BitReader::new(), - frame: Default::default(), - transforms: [None, None, None, None], - transform_order: Vec::new(), - } - } - - /// Reads the frame - pub(crate) fn decode_frame(&mut self) -> ImageResult<&LosslessFrame> { - let signature = self.r.read_u8()?; - - if signature != 0x2f { - return Err(DecoderError::LosslessSignatureInvalid(signature).into()); - } - - let mut buf = Vec::new(); - self.r.read_to_end(&mut buf)?; - self.bit_reader.init(buf); - - self.frame.width = self.bit_reader.read_bits::<u16>(14)? + 1; - self.frame.height = self.bit_reader.read_bits::<u16>(14)? + 1; - - let _alpha_used = self.bit_reader.read_bits::<u8>(1)?; - - let version_num = self.bit_reader.read_bits::<u8>(3)?; - - if version_num != 0 { - return Err(DecoderError::VersionNumberInvalid(version_num).into()); - } - - let mut data = self.decode_image_stream(self.frame.width, self.frame.height, true)?; - - for &trans_index in self.transform_order.iter().rev() { - let trans = self.transforms[usize::from(trans_index)].as_ref().unwrap(); - trans.apply_transform(&mut data, self.frame.width, self.frame.height)?; - } - - self.frame.buf = data; - Ok(&self.frame) - } - - //used for alpha data in extended decoding - pub(crate) fn decode_frame_implicit_dims( - &mut self, - width: u16, - height: u16, - ) -> ImageResult<&LosslessFrame> { - let mut buf = Vec::new(); - self.r.read_to_end(&mut buf)?; - self.bit_reader.init(buf); - - self.frame.width = width; - self.frame.height = height; - - let mut data = self.decode_image_stream(self.frame.width, self.frame.height, true)?; - - //transform_order is vector of indices(0-3) into transforms in order decoded - for &trans_index in self.transform_order.iter().rev() { - let trans = self.transforms[usize::from(trans_index)].as_ref().unwrap(); - trans.apply_transform(&mut data, self.frame.width, self.frame.height)?; - } - - self.frame.buf = data; - Ok(&self.frame) - } - - /// Reads Image data from the bitstream - /// Can be in any of the 5 roles described in the Specification - /// ARGB Image role has different behaviour to the other 4 - /// xsize and ysize describe the size of the blocks where each block has its own entropy code - fn decode_image_stream( - &mut self, - xsize: u16, - ysize: u16, - is_argb_img: bool, - ) -> ImageResult<Vec<u32>> { - let trans_xsize = if is_argb_img { - self.read_transforms()? - } else { - xsize - }; - - let color_cache_bits = self.read_color_cache()?; - - let color_cache = color_cache_bits.map(|bits| { - let size = 1 << bits; - let cache = vec![0u32; size]; - ColorCache { - color_cache_bits: bits, - color_cache: cache, - } - }); - - let huffman_info = self.read_huffman_codes(is_argb_img, trans_xsize, ysize, color_cache)?; - - //decode data - let data = self.decode_image_data(trans_xsize, ysize, huffman_info)?; - - Ok(data) - } - - /// Reads transforms and their data from the bitstream - fn read_transforms(&mut self) -> ImageResult<u16> { - let mut xsize = self.frame.width; - - while self.bit_reader.read_bits::<u8>(1)? == 1 { - let transform_type_val = self.bit_reader.read_bits::<u8>(2)?; - - if self.transforms[usize::from(transform_type_val)].is_some() { - //can only have one of each transform, error - return Err(DecoderError::TransformError.into()); - } - - self.transform_order.push(transform_type_val); - - let transform_type = match transform_type_val { - 0 => { - //predictor - - let size_bits = self.bit_reader.read_bits::<u8>(3)? + 2; - - let block_xsize = subsample_size(xsize, size_bits); - let block_ysize = subsample_size(self.frame.height, size_bits); - - let data = self.decode_image_stream(block_xsize, block_ysize, false)?; - - TransformType::PredictorTransform { - size_bits, - predictor_data: data, - } - } - 1 => { - //color transform - - let size_bits = self.bit_reader.read_bits::<u8>(3)? + 2; - - let block_xsize = subsample_size(xsize, size_bits); - let block_ysize = subsample_size(self.frame.height, size_bits); - - let data = self.decode_image_stream(block_xsize, block_ysize, false)?; - - TransformType::ColorTransform { - size_bits, - transform_data: data, - } - } - 2 => { - //subtract green - - TransformType::SubtractGreen - } - 3 => { - let color_table_size = self.bit_reader.read_bits::<u16>(8)? + 1; - - let mut color_map = self.decode_image_stream(color_table_size, 1, false)?; - - let bits = if color_table_size <= 2 { - 3 - } else if color_table_size <= 4 { - 2 - } else if color_table_size <= 16 { - 1 - } else { - 0 - }; - xsize = subsample_size(xsize, bits); - - Self::adjust_color_map(&mut color_map); - - TransformType::ColorIndexingTransform { - table_size: color_table_size, - table_data: color_map, - } - } - _ => unreachable!(), - }; - - self.transforms[usize::from(transform_type_val)] = Some(transform_type); - } - - Ok(xsize) - } - - /// Adjusts the color map since it's subtraction coded - fn adjust_color_map(color_map: &mut Vec<u32>) { - for i in 1..color_map.len() { - color_map[i] = add_pixels(color_map[i], color_map[i - 1]); - } - } - - /// Reads huffman codes associated with an image - fn read_huffman_codes( - &mut self, - read_meta: bool, - xsize: u16, - ysize: u16, - color_cache: Option<ColorCache>, - ) -> ImageResult<HuffmanInfo> { - let mut num_huff_groups = 1; - - let mut huffman_bits = 0; - let mut huffman_xsize = 1; - let mut huffman_ysize = 1; - let mut entropy_image = Vec::new(); - - if read_meta && self.bit_reader.read_bits::<u8>(1)? == 1 { - //meta huffman codes - huffman_bits = self.bit_reader.read_bits::<u8>(3)? + 2; - huffman_xsize = subsample_size(xsize, huffman_bits); - huffman_ysize = subsample_size(ysize, huffman_bits); - - entropy_image = self.decode_image_stream(huffman_xsize, huffman_ysize, false)?; - - for pixel in entropy_image.iter_mut() { - let meta_huff_code = (*pixel >> 8) & 0xffff; - - *pixel = meta_huff_code; - - if meta_huff_code >= num_huff_groups { - num_huff_groups = meta_huff_code + 1; - } - } - } - - let mut hufftree_groups = Vec::new(); - - for _i in 0..num_huff_groups { - let mut group: HuffmanCodeGroup = Default::default(); - for j in 0..HUFFMAN_CODES_PER_META_CODE { - let mut alphabet_size = ALPHABET_SIZE[j]; - if j == 0 { - if let Some(color_cache) = color_cache.as_ref() { - alphabet_size += 1 << color_cache.color_cache_bits; - } - } - - let tree = self.read_huffman_code(alphabet_size)?; - group[j] = tree; - } - hufftree_groups.push(group); - } - - let huffman_mask = if huffman_bits == 0 { - !0 - } else { - (1 << huffman_bits) - 1 - }; - - let info = HuffmanInfo { - xsize: huffman_xsize, - _ysize: huffman_ysize, - color_cache, - image: entropy_image, - bits: huffman_bits, - mask: huffman_mask, - huffman_code_groups: hufftree_groups, - }; - - Ok(info) - } - - /// Decodes and returns a single huffman tree - fn read_huffman_code(&mut self, alphabet_size: u16) -> ImageResult<HuffmanTree> { - let simple = self.bit_reader.read_bits::<u8>(1)? == 1; - - if simple { - let num_symbols = self.bit_reader.read_bits::<u8>(1)? + 1; - - let mut code_lengths = vec![u16::from(num_symbols - 1)]; - let mut codes = vec![0]; - let mut symbols = Vec::new(); - - let is_first_8bits = self.bit_reader.read_bits::<u8>(1)?; - symbols.push(self.bit_reader.read_bits::<u16>(1 + 7 * is_first_8bits)?); - - if num_symbols == 2 { - symbols.push(self.bit_reader.read_bits::<u16>(8)?); - code_lengths.push(1); - codes.push(1); - } - - HuffmanTree::build_explicit(code_lengths, codes, symbols) - } else { - let mut code_length_code_lengths = vec![0; CODE_LENGTH_CODES]; - - let num_code_lengths = 4 + self.bit_reader.read_bits::<usize>(4)?; - for i in 0..num_code_lengths { - code_length_code_lengths[CODE_LENGTH_CODE_ORDER[i]] = - self.bit_reader.read_bits(3)?; - } - - let new_code_lengths = - self.read_huffman_code_lengths(code_length_code_lengths, alphabet_size)?; - - HuffmanTree::build_implicit(new_code_lengths) - } - } - - /// Reads huffman code lengths - fn read_huffman_code_lengths( - &mut self, - code_length_code_lengths: Vec<u16>, - num_symbols: u16, - ) -> ImageResult<Vec<u16>> { - let table = HuffmanTree::build_implicit(code_length_code_lengths)?; - - let mut max_symbol = if self.bit_reader.read_bits::<u8>(1)? == 1 { - let length_nbits = 2 + 2 * self.bit_reader.read_bits::<u8>(3)?; - 2 + self.bit_reader.read_bits::<u16>(length_nbits)? - } else { - num_symbols - }; - - let mut code_lengths = vec![0; usize::from(num_symbols)]; - let mut prev_code_len = 8; //default code length - - let mut symbol = 0; - while symbol < num_symbols { - if max_symbol == 0 { - break; - } - max_symbol -= 1; - - let code_len = table.read_symbol(&mut self.bit_reader)?; - - if code_len < 16 { - code_lengths[usize::from(symbol)] = code_len; - symbol += 1; - if code_len != 0 { - prev_code_len = code_len; - } - } else { - let use_prev = code_len == 16; - let slot = code_len - 16; - let extra_bits = match slot { - 0 => 2, - 1 => 3, - 2 => 7, - _ => return Err(DecoderError::BitStreamError.into()), - }; - let repeat_offset = match slot { - 0 | 1 => 3, - 2 => 11, - _ => return Err(DecoderError::BitStreamError.into()), - }; - - let mut repeat = self.bit_reader.read_bits::<u16>(extra_bits)? + repeat_offset; - - if symbol + repeat > num_symbols { - return Err(DecoderError::BitStreamError.into()); - } else { - let length = if use_prev { prev_code_len } else { 0 }; - while repeat > 0 { - repeat -= 1; - code_lengths[usize::from(symbol)] = length; - symbol += 1; - } - } - } - } - - Ok(code_lengths) - } - - /// Decodes the image data using the huffman trees and either of the 3 methods of decoding - fn decode_image_data( - &mut self, - width: u16, - height: u16, - mut huffman_info: HuffmanInfo, - ) -> ImageResult<Vec<u32>> { - let num_values = usize::from(width) * usize::from(height); - let mut data = vec![0; num_values]; - - let huff_index = huffman_info.get_huff_index(0, 0); - let mut tree = &huffman_info.huffman_code_groups[huff_index]; - let mut last_cached = 0; - let mut index = 0; - let mut x = 0; - let mut y = 0; - while index < num_values { - if (x & huffman_info.mask) == 0 { - let index = huffman_info.get_huff_index(x, y); - tree = &huffman_info.huffman_code_groups[index]; - } - - let code = tree[GREEN].read_symbol(&mut self.bit_reader)?; - - //check code - if code < 256 { - //literal, so just use huffman codes and read as argb - let red = tree[RED].read_symbol(&mut self.bit_reader)?; - let blue = tree[BLUE].read_symbol(&mut self.bit_reader)?; - let alpha = tree[ALPHA].read_symbol(&mut self.bit_reader)?; - - data[index] = (u32::from(alpha) << 24) - + (u32::from(red) << 16) - + (u32::from(code) << 8) - + u32::from(blue); - - index += 1; - x += 1; - if x >= width { - x = 0; - y += 1; - } - } else if code < 256 + 24 { - //backward reference, so go back and use that to add image data - let length_symbol = code - 256; - let length = Self::get_copy_distance(&mut self.bit_reader, length_symbol)?; - - let dist_symbol = tree[DIST].read_symbol(&mut self.bit_reader)?; - let dist_code = Self::get_copy_distance(&mut self.bit_reader, dist_symbol)?; - let dist = Self::plane_code_to_distance(width, dist_code); - - if index < dist || num_values - index < length { - return Err(DecoderError::BitStreamError.into()); - } - - for i in 0..length { - data[index + i] = data[index + i - dist]; - } - index += length; - x += u16::try_from(length).unwrap(); - while x >= width { - x -= width; - y += 1; - } - if index < num_values { - let index = huffman_info.get_huff_index(x, y); - tree = &huffman_info.huffman_code_groups[index]; - } - } else { - //color cache, so use previously stored pixels to get this pixel - let key = code - 256 - 24; - - if let Some(color_cache) = huffman_info.color_cache.as_mut() { - //cache old colors - while last_cached < index { - color_cache.insert(data[last_cached]); - last_cached += 1; - } - data[index] = color_cache.lookup(key.into())?; - } else { - return Err(DecoderError::BitStreamError.into()); - } - index += 1; - x += 1; - if x >= width { - x = 0; - y += 1; - } - } - } - - Ok(data) - } - - /// Reads color cache data from the bitstream - fn read_color_cache(&mut self) -> ImageResult<Option<u8>> { - if self.bit_reader.read_bits::<u8>(1)? == 1 { - let code_bits = self.bit_reader.read_bits::<u8>(4)?; - - if !(1..=11).contains(&code_bits) { - return Err(DecoderError::InvalidColorCacheBits(code_bits).into()); - } - - Ok(Some(code_bits)) - } else { - Ok(None) - } - } - - /// Gets the copy distance from the prefix code and bitstream - fn get_copy_distance(bit_reader: &mut BitReader, prefix_code: u16) -> ImageResult<usize> { - if prefix_code < 4 { - return Ok(usize::from(prefix_code + 1)); - } - let extra_bits: u8 = ((prefix_code - 2) >> 1).try_into().unwrap(); - let offset = (2 + (usize::from(prefix_code) & 1)) << extra_bits; - - Ok(offset + bit_reader.read_bits::<usize>(extra_bits)? + 1) - } - - /// Gets distance to pixel - fn plane_code_to_distance(xsize: u16, plane_code: usize) -> usize { - if plane_code > 120 { - plane_code - 120 - } else { - let (xoffset, yoffset) = DISTANCE_MAP[plane_code - 1]; - - let dist = i32::from(xoffset) + i32::from(yoffset) * i32::from(xsize); - if dist < 1 { - return 1; - } - dist.try_into().unwrap() - } - } -} - -#[derive(Debug, Clone)] -struct HuffmanInfo { - xsize: u16, - _ysize: u16, - color_cache: Option<ColorCache>, - image: Vec<u32>, - bits: u8, - mask: u16, - huffman_code_groups: Vec<HuffmanCodeGroup>, -} - -impl HuffmanInfo { - fn get_huff_index(&self, x: u16, y: u16) -> usize { - if self.bits == 0 { - return 0; - } - let position = usize::from((y >> self.bits) * self.xsize + (x >> self.bits)); - let meta_huff_code: usize = self.image[position].try_into().unwrap(); - meta_huff_code - } -} - -#[derive(Debug, Clone)] -struct ColorCache { - color_cache_bits: u8, - color_cache: Vec<u32>, -} - -impl ColorCache { - fn insert(&mut self, color: u32) { - let index = (0x1e35a7bdu32.overflowing_mul(color).0) >> (32 - self.color_cache_bits); - self.color_cache[index as usize] = color; - } - - fn lookup(&self, index: usize) -> ImageResult<u32> { - match self.color_cache.get(index) { - Some(&value) => Ok(value), - None => Err(DecoderError::BitStreamError.into()), - } - } -} - -#[derive(Debug, Clone)] -pub(crate) struct BitReader { - buf: Vec<u8>, - index: usize, - bit_count: u8, -} - -impl BitReader { - fn new() -> BitReader { - BitReader { - buf: Vec::new(), - index: 0, - bit_count: 0, - } - } - - fn init(&mut self, buf: Vec<u8>) { - self.buf = buf; - } - - pub(crate) fn read_bits<T>(&mut self, num: u8) -> ImageResult<T> - where - T: num_traits::Unsigned + Shl<u8, Output = T> + AddAssign<T> + From<bool>, - { - let mut value: T = T::zero(); - - for i in 0..num { - if self.buf.len() <= self.index { - return Err(DecoderError::BitStreamError.into()); - } - let bit_true = self.buf[self.index] & (1 << self.bit_count) != 0; - value += T::from(bit_true) << i; - self.bit_count = if self.bit_count == 7 { - self.index += 1; - 0 - } else { - self.bit_count + 1 - }; - } - - Ok(value) - } -} - -#[derive(Debug, Clone, Default)] -pub(crate) struct LosslessFrame { - pub(crate) width: u16, - pub(crate) height: u16, - - pub(crate) buf: Vec<u32>, -} - -impl LosslessFrame { - /// Fills a buffer by converting from argb to rgba - pub(crate) fn fill_rgba(&self, buf: &mut [u8]) { - for (&argb_val, chunk) in self.buf.iter().zip(buf.chunks_exact_mut(4)) { - chunk[0] = ((argb_val >> 16) & 0xff).try_into().unwrap(); - chunk[1] = ((argb_val >> 8) & 0xff).try_into().unwrap(); - chunk[2] = (argb_val & 0xff).try_into().unwrap(); - chunk[3] = ((argb_val >> 24) & 0xff).try_into().unwrap(); - } - } - - /// Get buffer size from the image - pub(crate) fn get_buf_size(&self) -> usize { - usize::from(self.width) * usize::from(self.height) * 4 - } - - /// Fills a buffer with just the green values from the lossless decoding - /// Used in extended alpha decoding - pub(crate) fn fill_green(&self, buf: &mut [u8]) { - for (&argb_val, buf_value) in self.buf.iter().zip(buf.iter_mut()) { - *buf_value = ((argb_val >> 8) & 0xff).try_into().unwrap(); - } - } -} - -#[cfg(test)] -mod test { - - use super::BitReader; - - #[test] - fn bit_read_test() { - let mut bit_reader = BitReader::new(); - - //10011100 01000001 11100001 - let buf = vec![0x9C, 0x41, 0xE1]; - - bit_reader.init(buf); - - assert_eq!(bit_reader.read_bits::<u8>(3).unwrap(), 4); //100 - assert_eq!(bit_reader.read_bits::<u8>(2).unwrap(), 3); //11 - assert_eq!(bit_reader.read_bits::<u8>(6).unwrap(), 12); //001100 - assert_eq!(bit_reader.read_bits::<u16>(10).unwrap(), 40); //0000101000 - assert_eq!(bit_reader.read_bits::<u8>(3).unwrap(), 7); //111 - } - - #[test] - fn bit_read_error_test() { - let mut bit_reader = BitReader::new(); - - //01101010 - let buf = vec![0x6A]; - - bit_reader.init(buf); - - assert_eq!(bit_reader.read_bits::<u8>(3).unwrap(), 2); //010 - assert_eq!(bit_reader.read_bits::<u8>(5).unwrap(), 13); //01101 - assert!(bit_reader.read_bits::<u8>(4).is_err()); //error - } -} diff --git a/vendor/image/src/codecs/webp/lossless_transform.rs b/vendor/image/src/codecs/webp/lossless_transform.rs deleted file mode 100644 index f9a82c1..0000000 --- a/vendor/image/src/codecs/webp/lossless_transform.rs +++ /dev/null @@ -1,464 +0,0 @@ -use std::convert::TryFrom; -use std::convert::TryInto; - -use super::lossless::subsample_size; -use super::lossless::DecoderError; - -#[derive(Debug, Clone)] -pub(crate) enum TransformType { - PredictorTransform { - size_bits: u8, - predictor_data: Vec<u32>, - }, - ColorTransform { - size_bits: u8, - transform_data: Vec<u32>, - }, - SubtractGreen, - ColorIndexingTransform { - table_size: u16, - table_data: Vec<u32>, - }, -} - -impl TransformType { - /// Applies a transform to the image data - pub(crate) fn apply_transform( - &self, - image_data: &mut Vec<u32>, - width: u16, - height: u16, - ) -> Result<(), DecoderError> { - match self { - TransformType::PredictorTransform { - size_bits, - predictor_data, - } => { - let block_xsize = usize::from(subsample_size(width, *size_bits)); - let width = usize::from(width); - let height = usize::from(height); - - if image_data.len() < width * height { - return Err(DecoderError::TransformError); - } - - //handle top and left borders specially - //this involves ignoring mode and just setting prediction values like this - image_data[0] = add_pixels(image_data[0], 0xff000000); - - for x in 1..width { - image_data[x] = add_pixels(image_data[x], get_left(image_data, x, 0, width)); - } - - for y in 1..height { - image_data[y * width] = - add_pixels(image_data[y * width], get_top(image_data, 0, y, width)); - } - - for y in 1..height { - for x in 1..width { - let block_index = (y >> size_bits) * block_xsize + (x >> size_bits); - - let index = y * width + x; - - let green = (predictor_data[block_index] >> 8) & 0xff; - - match green { - 0 => image_data[index] = add_pixels(image_data[index], 0xff000000), - 1 => { - image_data[index] = - add_pixels(image_data[index], get_left(image_data, x, y, width)) - } - 2 => { - image_data[index] = - add_pixels(image_data[index], get_top(image_data, x, y, width)) - } - 3 => { - image_data[index] = add_pixels( - image_data[index], - get_top_right(image_data, x, y, width), - ) - } - 4 => { - image_data[index] = add_pixels( - image_data[index], - get_top_left(image_data, x, y, width), - ) - } - 5 => { - image_data[index] = add_pixels(image_data[index], { - let first = average2( - get_left(image_data, x, y, width), - get_top_right(image_data, x, y, width), - ); - average2(first, get_top(image_data, x, y, width)) - }) - } - 6 => { - image_data[index] = add_pixels( - image_data[index], - average2( - get_left(image_data, x, y, width), - get_top_left(image_data, x, y, width), - ), - ) - } - 7 => { - image_data[index] = add_pixels( - image_data[index], - average2( - get_left(image_data, x, y, width), - get_top(image_data, x, y, width), - ), - ) - } - 8 => { - image_data[index] = add_pixels( - image_data[index], - average2( - get_top_left(image_data, x, y, width), - get_top(image_data, x, y, width), - ), - ) - } - 9 => { - image_data[index] = add_pixels( - image_data[index], - average2( - get_top(image_data, x, y, width), - get_top_right(image_data, x, y, width), - ), - ) - } - 10 => { - image_data[index] = add_pixels(image_data[index], { - let first = average2( - get_left(image_data, x, y, width), - get_top_left(image_data, x, y, width), - ); - let second = average2( - get_top(image_data, x, y, width), - get_top_right(image_data, x, y, width), - ); - average2(first, second) - }) - } - 11 => { - image_data[index] = add_pixels( - image_data[index], - select( - get_left(image_data, x, y, width), - get_top(image_data, x, y, width), - get_top_left(image_data, x, y, width), - ), - ) - } - 12 => { - image_data[index] = add_pixels( - image_data[index], - clamp_add_subtract_full( - get_left(image_data, x, y, width), - get_top(image_data, x, y, width), - get_top_left(image_data, x, y, width), - ), - ) - } - 13 => { - image_data[index] = add_pixels(image_data[index], { - let first = average2( - get_left(image_data, x, y, width), - get_top(image_data, x, y, width), - ); - clamp_add_subtract_half( - first, - get_top_left(image_data, x, y, width), - ) - }) - } - _ => {} - } - } - } - } - TransformType::ColorTransform { - size_bits, - transform_data, - } => { - let block_xsize = usize::from(subsample_size(width, *size_bits)); - let width = usize::from(width); - let height = usize::from(height); - - for y in 0..height { - for x in 0..width { - let block_index = (y >> size_bits) * block_xsize + (x >> size_bits); - - let index = y * width + x; - - let multiplier = - ColorTransformElement::from_color_code(transform_data[block_index]); - - image_data[index] = transform_color(&multiplier, image_data[index]); - } - } - } - TransformType::SubtractGreen => { - let width = usize::from(width); - for y in 0..usize::from(height) { - for x in 0..width { - image_data[y * width + x] = add_green(image_data[y * width + x]); - } - } - } - TransformType::ColorIndexingTransform { - table_size, - table_data, - } => { - let mut new_image_data = - Vec::with_capacity(usize::from(width) * usize::from(height)); - - let table_size = *table_size; - let width_bits: u8 = if table_size <= 2 { - 3 - } else if table_size <= 4 { - 2 - } else if table_size <= 16 { - 1 - } else { - 0 - }; - - let bits_per_pixel = 8 >> width_bits; - let mask = (1 << bits_per_pixel) - 1; - - let mut src = 0; - let width = usize::from(width); - - let pixels_per_byte = 1 << width_bits; - let count_mask = pixels_per_byte - 1; - let mut packed_pixels = 0; - - for _y in 0..usize::from(height) { - for x in 0..width { - if (x & count_mask) == 0 { - packed_pixels = (image_data[src] >> 8) & 0xff; - src += 1; - } - - let pixels: usize = (packed_pixels & mask).try_into().unwrap(); - let new_val = if pixels >= table_size.into() { - 0x00000000 - } else { - table_data[pixels] - }; - - new_image_data.push(new_val); - - packed_pixels >>= bits_per_pixel; - } - } - - *image_data = new_image_data; - } - } - - Ok(()) - } -} - -//predictor functions - -/// Adds 2 pixels mod 256 for each pixel -pub(crate) fn add_pixels(a: u32, b: u32) -> u32 { - let new_alpha = ((a >> 24) + (b >> 24)) & 0xff; - let new_red = (((a >> 16) & 0xff) + ((b >> 16) & 0xff)) & 0xff; - let new_green = (((a >> 8) & 0xff) + ((b >> 8) & 0xff)) & 0xff; - let new_blue = ((a & 0xff) + (b & 0xff)) & 0xff; - - (new_alpha << 24) + (new_red << 16) + (new_green << 8) + new_blue -} - -/// Get left pixel -fn get_left(data: &[u32], x: usize, y: usize, width: usize) -> u32 { - data[y * width + x - 1] -} - -/// Get top pixel -fn get_top(data: &[u32], x: usize, y: usize, width: usize) -> u32 { - data[(y - 1) * width + x] -} - -/// Get pixel to top right -fn get_top_right(data: &[u32], x: usize, y: usize, width: usize) -> u32 { - // if x == width - 1 this gets the left most pixel of the current row - // as described in the specification - data[(y - 1) * width + x + 1] -} - -/// Get pixel to top left -fn get_top_left(data: &[u32], x: usize, y: usize, width: usize) -> u32 { - data[(y - 1) * width + x - 1] -} - -/// Get average of 2 pixels -fn average2(a: u32, b: u32) -> u32 { - let mut avg = 0u32; - for i in 0..4 { - let sub_a: u8 = ((a >> (i * 8)) & 0xff).try_into().unwrap(); - let sub_b: u8 = ((b >> (i * 8)) & 0xff).try_into().unwrap(); - avg |= u32::from(sub_average2(sub_a, sub_b)) << (i * 8); - } - avg -} - -/// Get average of 2 bytes -fn sub_average2(a: u8, b: u8) -> u8 { - ((u16::from(a) + u16::from(b)) / 2).try_into().unwrap() -} - -/// Get a specific byte from argb pixel -fn get_byte(val: u32, byte: u8) -> u8 { - ((val >> (byte * 8)) & 0xff).try_into().unwrap() -} - -/// Get byte as i32 for convenience -fn get_byte_i32(val: u32, byte: u8) -> i32 { - i32::from(get_byte(val, byte)) -} - -/// Select left or top byte -fn select(left: u32, top: u32, top_left: u32) -> u32 { - let predict_alpha = get_byte_i32(left, 3) + get_byte_i32(top, 3) - get_byte_i32(top_left, 3); - let predict_red = get_byte_i32(left, 2) + get_byte_i32(top, 2) - get_byte_i32(top_left, 2); - let predict_green = get_byte_i32(left, 1) + get_byte_i32(top, 1) - get_byte_i32(top_left, 1); - let predict_blue = get_byte_i32(left, 0) + get_byte_i32(top, 0) - get_byte_i32(top_left, 0); - - let predict_left = i32::abs(predict_alpha - get_byte_i32(left, 3)) - + i32::abs(predict_red - get_byte_i32(left, 2)) - + i32::abs(predict_green - get_byte_i32(left, 1)) - + i32::abs(predict_blue - get_byte_i32(left, 0)); - let predict_top = i32::abs(predict_alpha - get_byte_i32(top, 3)) - + i32::abs(predict_red - get_byte_i32(top, 2)) - + i32::abs(predict_green - get_byte_i32(top, 1)) - + i32::abs(predict_blue - get_byte_i32(top, 0)); - - if predict_left < predict_top { - left - } else { - top - } -} - -/// Clamp a to [0, 255] -fn clamp(a: i32) -> i32 { - if a < 0 { - 0 - } else if a > 255 { - 255 - } else { - a - } -} - -/// Clamp add subtract full on one part -fn clamp_add_subtract_full_sub(a: i32, b: i32, c: i32) -> i32 { - clamp(a + b - c) -} - -/// Clamp add subtract half on one part -fn clamp_add_subtract_half_sub(a: i32, b: i32) -> i32 { - clamp(a + (a - b) / 2) -} - -/// Clamp add subtract full on 3 pixels -fn clamp_add_subtract_full(a: u32, b: u32, c: u32) -> u32 { - let mut value: u32 = 0; - for i in 0..4u8 { - let sub_a: i32 = ((a >> (i * 8)) & 0xff).try_into().unwrap(); - let sub_b: i32 = ((b >> (i * 8)) & 0xff).try_into().unwrap(); - let sub_c: i32 = ((c >> (i * 8)) & 0xff).try_into().unwrap(); - value |= - u32::try_from(clamp_add_subtract_full_sub(sub_a, sub_b, sub_c)).unwrap() << (i * 8); - } - value -} - -/// Clamp add subtract half on 2 pixels -fn clamp_add_subtract_half(a: u32, b: u32) -> u32 { - let mut value = 0; - for i in 0..4u8 { - let sub_a: i32 = ((a >> (i * 8)) & 0xff).try_into().unwrap(); - let sub_b: i32 = ((b >> (i * 8)) & 0xff).try_into().unwrap(); - value |= u32::try_from(clamp_add_subtract_half_sub(sub_a, sub_b)).unwrap() << (i * 8); - } - - value -} - -//color transform - -#[derive(Debug, Clone, Copy)] -struct ColorTransformElement { - green_to_red: u8, - green_to_blue: u8, - red_to_blue: u8, -} - -impl ColorTransformElement { - fn from_color_code(color_code: u32) -> ColorTransformElement { - ColorTransformElement { - green_to_red: (color_code & 0xff).try_into().unwrap(), - green_to_blue: ((color_code >> 8) & 0xff).try_into().unwrap(), - red_to_blue: ((color_code >> 16) & 0xff).try_into().unwrap(), - } - } -} - -/// Does color transform on red and blue transformed by green -fn color_transform(red: u8, blue: u8, green: u8, trans: &ColorTransformElement) -> (u8, u8) { - let mut temp_red = u32::from(red); - let mut temp_blue = u32::from(blue); - - //as does the conversion from u8 to signed two's complement i8 required - temp_red += color_transform_delta(trans.green_to_red as i8, green as i8); - temp_blue += color_transform_delta(trans.green_to_blue as i8, green as i8); - temp_blue += color_transform_delta(trans.red_to_blue as i8, temp_red as i8); - - ( - (temp_red & 0xff).try_into().unwrap(), - (temp_blue & 0xff).try_into().unwrap(), - ) -} - -/// Does color transform on 2 numbers -fn color_transform_delta(t: i8, c: i8) -> u32 { - ((i16::from(t) * i16::from(c)) as u32) >> 5 -} - -// Does color transform on a pixel with a color transform element -fn transform_color(multiplier: &ColorTransformElement, color_value: u32) -> u32 { - let alpha = get_byte(color_value, 3); - let red = get_byte(color_value, 2); - let green = get_byte(color_value, 1); - let blue = get_byte(color_value, 0); - - let (new_red, new_blue) = color_transform(red, blue, green, multiplier); - - (u32::from(alpha) << 24) - + (u32::from(new_red) << 16) - + (u32::from(green) << 8) - + u32::from(new_blue) -} - -//subtract green function - -/// Adds green to red and blue of a pixel -fn add_green(argb: u32) -> u32 { - let red = (argb >> 16) & 0xff; - let green = (argb >> 8) & 0xff; - let blue = argb & 0xff; - - let new_red = (red + green) & 0xff; - let new_blue = (blue + green) & 0xff; - - (argb & 0xff00ff00) | (new_red << 16) | (new_blue) -} diff --git a/vendor/image/src/codecs/webp/mod.rs b/vendor/image/src/codecs/webp/mod.rs deleted file mode 100644 index b38faed..0000000 --- a/vendor/image/src/codecs/webp/mod.rs +++ /dev/null @@ -1,28 +0,0 @@ -//! Decoding and Encoding of WebP Images - -#[cfg(feature = "webp-encoder")] -pub use self::encoder::{WebPEncoder, WebPQuality}; - -#[cfg(feature = "webp-encoder")] -mod encoder; - -#[cfg(feature = "webp")] -pub use self::decoder::WebPDecoder; - -#[cfg(feature = "webp")] -mod decoder; -#[cfg(feature = "webp")] -mod extended; -#[cfg(feature = "webp")] -mod huffman; -#[cfg(feature = "webp")] -mod loop_filter; -#[cfg(feature = "webp")] -mod lossless; -#[cfg(feature = "webp")] -mod lossless_transform; -#[cfg(feature = "webp")] -mod transform; - -#[cfg(feature = "webp")] -pub mod vp8; diff --git a/vendor/image/src/codecs/webp/transform.rs b/vendor/image/src/codecs/webp/transform.rs deleted file mode 100644 index 3b3ef5a..0000000 --- a/vendor/image/src/codecs/webp/transform.rs +++ /dev/null @@ -1,77 +0,0 @@ -static CONST1: i64 = 20091; -static CONST2: i64 = 35468; - -pub(crate) fn idct4x4(block: &mut [i32]) { - // The intermediate results may overflow the types, so we stretch the type. - fn fetch(block: &mut [i32], idx: usize) -> i64 { - i64::from(block[idx]) - } - - for i in 0usize..4 { - let a1 = fetch(block, i) + fetch(block, 8 + i); - let b1 = fetch(block, i) - fetch(block, 8 + i); - - let t1 = (fetch(block, 4 + i) * CONST2) >> 16; - let t2 = fetch(block, 12 + i) + ((fetch(block, 12 + i) * CONST1) >> 16); - let c1 = t1 - t2; - - let t1 = fetch(block, 4 + i) + ((fetch(block, 4 + i) * CONST1) >> 16); - let t2 = (fetch(block, 12 + i) * CONST2) >> 16; - let d1 = t1 + t2; - - block[i] = (a1 + d1) as i32; - block[4 + i] = (b1 + c1) as i32; - block[4 * 3 + i] = (a1 - d1) as i32; - block[4 * 2 + i] = (b1 - c1) as i32; - } - - for i in 0usize..4 { - let a1 = fetch(block, 4 * i) + fetch(block, 4 * i + 2); - let b1 = fetch(block, 4 * i) - fetch(block, 4 * i + 2); - - let t1 = (fetch(block, 4 * i + 1) * CONST2) >> 16; - let t2 = fetch(block, 4 * i + 3) + ((fetch(block, 4 * i + 3) * CONST1) >> 16); - let c1 = t1 - t2; - - let t1 = fetch(block, 4 * i + 1) + ((fetch(block, 4 * i + 1) * CONST1) >> 16); - let t2 = (fetch(block, 4 * i + 3) * CONST2) >> 16; - let d1 = t1 + t2; - - block[4 * i] = ((a1 + d1 + 4) >> 3) as i32; - block[4 * i + 3] = ((a1 - d1 + 4) >> 3) as i32; - block[4 * i + 1] = ((b1 + c1 + 4) >> 3) as i32; - block[4 * i + 2] = ((b1 - c1 + 4) >> 3) as i32; - } -} - -// 14.3 -pub(crate) fn iwht4x4(block: &mut [i32]) { - for i in 0usize..4 { - let a1 = block[i] + block[12 + i]; - let b1 = block[4 + i] + block[8 + i]; - let c1 = block[4 + i] - block[8 + i]; - let d1 = block[i] - block[12 + i]; - - block[i] = a1 + b1; - block[4 + i] = c1 + d1; - block[8 + i] = a1 - b1; - block[12 + i] = d1 - c1; - } - - for i in 0usize..4 { - let a1 = block[4 * i] + block[4 * i + 3]; - let b1 = block[4 * i + 1] + block[4 * i + 2]; - let c1 = block[4 * i + 1] - block[4 * i + 2]; - let d1 = block[4 * i] - block[4 * i + 3]; - - let a2 = a1 + b1; - let b2 = c1 + d1; - let c2 = a1 - b1; - let d2 = d1 - c1; - - block[4 * i] = (a2 + 3) >> 3; - block[4 * i + 1] = (b2 + 3) >> 3; - block[4 * i + 2] = (c2 + 3) >> 3; - block[4 * i + 3] = (d2 + 3) >> 3; - } -} diff --git a/vendor/image/src/codecs/webp/vp8.rs b/vendor/image/src/codecs/webp/vp8.rs deleted file mode 100644 index 67b8820..0000000 --- a/vendor/image/src/codecs/webp/vp8.rs +++ /dev/null @@ -1,2932 +0,0 @@ -//! An implementation of the VP8 Video Codec -//! -//! This module contains a partial implementation of the -//! VP8 video format as defined in RFC-6386. -//! -//! It decodes Keyframes only. -//! VP8 is the underpinning of the WebP image format -//! -//! # Related Links -//! * [rfc-6386](http://tools.ietf.org/html/rfc6386) - The VP8 Data Format and Decoding Guide -//! * [VP8.pdf](http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/37073.pdf) - An overview of -//! of the VP8 format -//! - -use byteorder::{LittleEndian, ReadBytesExt}; -use std::convert::TryInto; -use std::default::Default; -use std::io::Read; -use std::{cmp, error, fmt}; - -use super::loop_filter; -use super::transform; -use crate::error::{ - DecodingError, ImageError, ImageResult, UnsupportedError, UnsupportedErrorKind, -}; -use crate::image::ImageFormat; - -use crate::utils::clamp; - -const MAX_SEGMENTS: usize = 4; -const NUM_DCT_TOKENS: usize = 12; - -// Prediction modes -const DC_PRED: i8 = 0; -const V_PRED: i8 = 1; -const H_PRED: i8 = 2; -const TM_PRED: i8 = 3; -const B_PRED: i8 = 4; - -const B_DC_PRED: i8 = 0; -const B_TM_PRED: i8 = 1; -const B_VE_PRED: i8 = 2; -const B_HE_PRED: i8 = 3; -const B_LD_PRED: i8 = 4; -const B_RD_PRED: i8 = 5; -const B_VR_PRED: i8 = 6; -const B_VL_PRED: i8 = 7; -const B_HD_PRED: i8 = 8; -const B_HU_PRED: i8 = 9; - -// Prediction mode enum -#[repr(i8)] -#[derive(Clone, Copy, Debug, PartialEq, Eq)] -enum LumaMode { - /// Predict DC using row above and column to the left. - DC = DC_PRED, - - /// Predict rows using row above. - V = V_PRED, - - /// Predict columns using column to the left. - H = H_PRED, - - /// Propagate second differences. - TM = TM_PRED, - - /// Each Y subblock is independently predicted. - B = B_PRED, -} - -#[repr(i8)] -#[derive(Clone, Copy, Debug, PartialEq, Eq)] -enum ChromaMode { - /// Predict DC using row above and column to the left. - DC = DC_PRED, - - /// Predict rows using row above. - V = V_PRED, - - /// Predict columns using column to the left. - H = H_PRED, - - /// Propagate second differences. - TM = TM_PRED, -} - -#[repr(i8)] -#[derive(Clone, Copy, Debug, PartialEq, Eq)] -enum IntraMode { - DC = B_DC_PRED, - TM = B_TM_PRED, - VE = B_VE_PRED, - HE = B_HE_PRED, - LD = B_LD_PRED, - RD = B_RD_PRED, - VR = B_VR_PRED, - VL = B_VL_PRED, - HD = B_HD_PRED, - HU = B_HU_PRED, -} - -type Prob = u8; - -static SEGMENT_ID_TREE: [i8; 6] = [2, 4, -0, -1, -2, -3]; - -// Section 11.2 -// Tree for determining the keyframe luma intra prediction modes: -static KEYFRAME_YMODE_TREE: [i8; 8] = [-B_PRED, 2, 4, 6, -DC_PRED, -V_PRED, -H_PRED, -TM_PRED]; - -// Default probabilities for decoding the keyframe luma modes -static KEYFRAME_YMODE_PROBS: [Prob; 4] = [145, 156, 163, 128]; - -// Tree for determining the keyframe B_PRED mode: -static KEYFRAME_BPRED_MODE_TREE: [i8; 18] = [ - -B_DC_PRED, 2, -B_TM_PRED, 4, -B_VE_PRED, 6, 8, 12, -B_HE_PRED, 10, -B_RD_PRED, -B_VR_PRED, - -B_LD_PRED, 14, -B_VL_PRED, 16, -B_HD_PRED, -B_HU_PRED, -]; - -// Probabilities for the BPRED_MODE_TREE -static KEYFRAME_BPRED_MODE_PROBS: [[[u8; 9]; 10]; 10] = [ - [ - [231, 120, 48, 89, 115, 113, 120, 152, 112], - [152, 179, 64, 126, 170, 118, 46, 70, 95], - [175, 69, 143, 80, 85, 82, 72, 155, 103], - [56, 58, 10, 171, 218, 189, 17, 13, 152], - [144, 71, 10, 38, 171, 213, 144, 34, 26], - [114, 26, 17, 163, 44, 195, 21, 10, 173], - [121, 24, 80, 195, 26, 62, 44, 64, 85], - [170, 46, 55, 19, 136, 160, 33, 206, 71], - [63, 20, 8, 114, 114, 208, 12, 9, 226], - [81, 40, 11, 96, 182, 84, 29, 16, 36], - ], - [ - [134, 183, 89, 137, 98, 101, 106, 165, 148], - [72, 187, 100, 130, 157, 111, 32, 75, 80], - [66, 102, 167, 99, 74, 62, 40, 234, 128], - [41, 53, 9, 178, 241, 141, 26, 8, 107], - [104, 79, 12, 27, 217, 255, 87, 17, 7], - [74, 43, 26, 146, 73, 166, 49, 23, 157], - [65, 38, 105, 160, 51, 52, 31, 115, 128], - [87, 68, 71, 44, 114, 51, 15, 186, 23], - [47, 41, 14, 110, 182, 183, 21, 17, 194], - [66, 45, 25, 102, 197, 189, 23, 18, 22], - ], - [ - [88, 88, 147, 150, 42, 46, 45, 196, 205], - [43, 97, 183, 117, 85, 38, 35, 179, 61], - [39, 53, 200, 87, 26, 21, 43, 232, 171], - [56, 34, 51, 104, 114, 102, 29, 93, 77], - [107, 54, 32, 26, 51, 1, 81, 43, 31], - [39, 28, 85, 171, 58, 165, 90, 98, 64], - [34, 22, 116, 206, 23, 34, 43, 166, 73], - [68, 25, 106, 22, 64, 171, 36, 225, 114], - [34, 19, 21, 102, 132, 188, 16, 76, 124], - [62, 18, 78, 95, 85, 57, 50, 48, 51], - ], - [ - [193, 101, 35, 159, 215, 111, 89, 46, 111], - [60, 148, 31, 172, 219, 228, 21, 18, 111], - [112, 113, 77, 85, 179, 255, 38, 120, 114], - [40, 42, 1, 196, 245, 209, 10, 25, 109], - [100, 80, 8, 43, 154, 1, 51, 26, 71], - [88, 43, 29, 140, 166, 213, 37, 43, 154], - [61, 63, 30, 155, 67, 45, 68, 1, 209], - [142, 78, 78, 16, 255, 128, 34, 197, 171], - [41, 40, 5, 102, 211, 183, 4, 1, 221], - [51, 50, 17, 168, 209, 192, 23, 25, 82], - ], - [ - [125, 98, 42, 88, 104, 85, 117, 175, 82], - [95, 84, 53, 89, 128, 100, 113, 101, 45], - [75, 79, 123, 47, 51, 128, 81, 171, 1], - [57, 17, 5, 71, 102, 57, 53, 41, 49], - [115, 21, 2, 10, 102, 255, 166, 23, 6], - [38, 33, 13, 121, 57, 73, 26, 1, 85], - [41, 10, 67, 138, 77, 110, 90, 47, 114], - [101, 29, 16, 10, 85, 128, 101, 196, 26], - [57, 18, 10, 102, 102, 213, 34, 20, 43], - [117, 20, 15, 36, 163, 128, 68, 1, 26], - ], - [ - [138, 31, 36, 171, 27, 166, 38, 44, 229], - [67, 87, 58, 169, 82, 115, 26, 59, 179], - [63, 59, 90, 180, 59, 166, 93, 73, 154], - [40, 40, 21, 116, 143, 209, 34, 39, 175], - [57, 46, 22, 24, 128, 1, 54, 17, 37], - [47, 15, 16, 183, 34, 223, 49, 45, 183], - [46, 17, 33, 183, 6, 98, 15, 32, 183], - [65, 32, 73, 115, 28, 128, 23, 128, 205], - [40, 3, 9, 115, 51, 192, 18, 6, 223], - [87, 37, 9, 115, 59, 77, 64, 21, 47], - ], - [ - [104, 55, 44, 218, 9, 54, 53, 130, 226], - [64, 90, 70, 205, 40, 41, 23, 26, 57], - [54, 57, 112, 184, 5, 41, 38, 166, 213], - [30, 34, 26, 133, 152, 116, 10, 32, 134], - [75, 32, 12, 51, 192, 255, 160, 43, 51], - [39, 19, 53, 221, 26, 114, 32, 73, 255], - [31, 9, 65, 234, 2, 15, 1, 118, 73], - [88, 31, 35, 67, 102, 85, 55, 186, 85], - [56, 21, 23, 111, 59, 205, 45, 37, 192], - [55, 38, 70, 124, 73, 102, 1, 34, 98], - ], - [ - [102, 61, 71, 37, 34, 53, 31, 243, 192], - [69, 60, 71, 38, 73, 119, 28, 222, 37], - [68, 45, 128, 34, 1, 47, 11, 245, 171], - [62, 17, 19, 70, 146, 85, 55, 62, 70], - [75, 15, 9, 9, 64, 255, 184, 119, 16], - [37, 43, 37, 154, 100, 163, 85, 160, 1], - [63, 9, 92, 136, 28, 64, 32, 201, 85], - [86, 6, 28, 5, 64, 255, 25, 248, 1], - [56, 8, 17, 132, 137, 255, 55, 116, 128], - [58, 15, 20, 82, 135, 57, 26, 121, 40], - ], - [ - [164, 50, 31, 137, 154, 133, 25, 35, 218], - [51, 103, 44, 131, 131, 123, 31, 6, 158], - [86, 40, 64, 135, 148, 224, 45, 183, 128], - [22, 26, 17, 131, 240, 154, 14, 1, 209], - [83, 12, 13, 54, 192, 255, 68, 47, 28], - [45, 16, 21, 91, 64, 222, 7, 1, 197], - [56, 21, 39, 155, 60, 138, 23, 102, 213], - [85, 26, 85, 85, 128, 128, 32, 146, 171], - [18, 11, 7, 63, 144, 171, 4, 4, 246], - [35, 27, 10, 146, 174, 171, 12, 26, 128], - ], - [ - [190, 80, 35, 99, 180, 80, 126, 54, 45], - [85, 126, 47, 87, 176, 51, 41, 20, 32], - [101, 75, 128, 139, 118, 146, 116, 128, 85], - [56, 41, 15, 176, 236, 85, 37, 9, 62], - [146, 36, 19, 30, 171, 255, 97, 27, 20], - [71, 30, 17, 119, 118, 255, 17, 18, 138], - [101, 38, 60, 138, 55, 70, 43, 26, 142], - [138, 45, 61, 62, 219, 1, 81, 188, 64], - [32, 41, 20, 117, 151, 142, 20, 21, 163], - [112, 19, 12, 61, 195, 128, 48, 4, 24], - ], -]; - -// Section 11.4 Tree for determining macroblock the chroma mode -static KEYFRAME_UV_MODE_TREE: [i8; 6] = [-DC_PRED, 2, -V_PRED, 4, -H_PRED, -TM_PRED]; - -// Probabilities for determining macroblock mode -static KEYFRAME_UV_MODE_PROBS: [Prob; 3] = [142, 114, 183]; - -// Section 13.4 -type TokenProbTables = [[[[Prob; NUM_DCT_TOKENS - 1]; 3]; 8]; 4]; - -// Probabilities that a token's probability will be updated -static COEFF_UPDATE_PROBS: TokenProbTables = [ - [ - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255], - [249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255], - [234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255], - [250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255], - [254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - ], - [ - [ - [217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255], - [234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255], - ], - [ - [255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255], - [250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - ], - [ - [ - [186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255], - [234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255], - [251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255], - ], - [ - [255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - ], - [ - [ - [248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255], - [248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255], - [246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255], - [252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255], - [248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255], - [253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255], - [252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255], - [250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - [ - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255], - ], - ], -]; - -// Section 13.5 -// Default Probabilities for tokens -static COEFF_PROBS: TokenProbTables = [ - [ - [ - [128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128], - [128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128], - [128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128], - ], - [ - [253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128], - [189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128], - [106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128], - ], - [ - [1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128], - [181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128], - [78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128], - ], - [ - [1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128], - [184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128], - [77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128], - ], - [ - [1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128], - [170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128], - [37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128], - ], - [ - [1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128], - [207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128], - [102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128], - ], - [ - [1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128], - [177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128], - [80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128], - ], - [ - [1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128], - [246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128], - [255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128], - ], - ], - [ - [ - [198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62], - [131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1], - [68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128], - ], - [ - [1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128], - [184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128], - [81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128], - ], - [ - [1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128], - [99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128], - [23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128], - ], - [ - [1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128], - [109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128], - [44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128], - ], - [ - [1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128], - [94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128], - [22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128], - ], - [ - [1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128], - [124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128], - [35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128], - ], - [ - [1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128], - [121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128], - [45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128], - ], - [ - [1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128], - [203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128], - [137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128], - ], - ], - [ - [ - [253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128], - [175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128], - [73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128], - ], - [ - [1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128], - [239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128], - [155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128], - ], - [ - [1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128], - [201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128], - [69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128], - ], - [ - [1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128], - [223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128], - [141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128], - ], - [ - [1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128], - [190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128], - [149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128], - ], - [ - [1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128], - [247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128], - [240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128], - ], - [ - [1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128], - [213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128], - [55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128], - ], - [ - [128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128], - [128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128], - [128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128], - ], - ], - [ - [ - [202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255], - [126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128], - [61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128], - ], - [ - [1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128], - [166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128], - [39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128], - ], - [ - [1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128], - [124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128], - [24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128], - ], - [ - [1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128], - [149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128], - [28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128], - ], - [ - [1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128], - [123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128], - [20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128], - ], - [ - [1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128], - [168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128], - [47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128], - ], - [ - [1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128], - [141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128], - [42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128], - ], - [ - [1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128], - [244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128], - [238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128], - ], - ], -]; - -// DCT Tokens -const DCT_0: i8 = 0; -const DCT_1: i8 = 1; -const DCT_2: i8 = 2; -const DCT_3: i8 = 3; -const DCT_4: i8 = 4; -const DCT_CAT1: i8 = 5; -const DCT_CAT2: i8 = 6; -const DCT_CAT3: i8 = 7; -const DCT_CAT4: i8 = 8; -const DCT_CAT5: i8 = 9; -const DCT_CAT6: i8 = 10; -const DCT_EOB: i8 = 11; - -static DCT_TOKEN_TREE: [i8; 22] = [ - -DCT_EOB, 2, -DCT_0, 4, -DCT_1, 6, 8, 12, -DCT_2, 10, -DCT_3, -DCT_4, 14, 16, -DCT_CAT1, - -DCT_CAT2, 18, 20, -DCT_CAT3, -DCT_CAT4, -DCT_CAT5, -DCT_CAT6, -]; - -static PROB_DCT_CAT: [[Prob; 12]; 6] = [ - [159, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], - [165, 145, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], - [173, 148, 140, 0, 0, 0, 0, 0, 0, 0, 0, 0], - [176, 155, 140, 135, 0, 0, 0, 0, 0, 0, 0, 0], - [180, 157, 141, 134, 130, 0, 0, 0, 0, 0, 0, 0], - [254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0], -]; - -static DCT_CAT_BASE: [u8; 6] = [5, 7, 11, 19, 35, 67]; -static COEFF_BANDS: [u8; 16] = [0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7]; - -#[rustfmt::skip] -static DC_QUANT: [i16; 128] = [ - 4, 5, 6, 7, 8, 9, 10, 10, - 11, 12, 13, 14, 15, 16, 17, 17, - 18, 19, 20, 20, 21, 21, 22, 22, - 23, 23, 24, 25, 25, 26, 27, 28, - 29, 30, 31, 32, 33, 34, 35, 36, - 37, 37, 38, 39, 40, 41, 42, 43, - 44, 45, 46, 46, 47, 48, 49, 50, - 51, 52, 53, 54, 55, 56, 57, 58, - 59, 60, 61, 62, 63, 64, 65, 66, - 67, 68, 69, 70, 71, 72, 73, 74, - 75, 76, 76, 77, 78, 79, 80, 81, - 82, 83, 84, 85, 86, 87, 88, 89, - 91, 93, 95, 96, 98, 100, 101, 102, - 104, 106, 108, 110, 112, 114, 116, 118, - 122, 124, 126, 128, 130, 132, 134, 136, - 138, 140, 143, 145, 148, 151, 154, 157, -]; - -#[rustfmt::skip] -static AC_QUANT: [i16; 128] = [ - 4, 5, 6, 7, 8, 9, 10, 11, - 12, 13, 14, 15, 16, 17, 18, 19, - 20, 21, 22, 23, 24, 25, 26, 27, - 28, 29, 30, 31, 32, 33, 34, 35, - 36, 37, 38, 39, 40, 41, 42, 43, - 44, 45, 46, 47, 48, 49, 50, 51, - 52, 53, 54, 55, 56, 57, 58, 60, - 62, 64, 66, 68, 70, 72, 74, 76, - 78, 80, 82, 84, 86, 88, 90, 92, - 94, 96, 98, 100, 102, 104, 106, 108, - 110, 112, 114, 116, 119, 122, 125, 128, - 131, 134, 137, 140, 143, 146, 149, 152, - 155, 158, 161, 164, 167, 170, 173, 177, - 181, 185, 189, 193, 197, 201, 205, 209, - 213, 217, 221, 225, 229, 234, 239, 245, - 249, 254, 259, 264, 269, 274, 279, 284, -]; - -static ZIGZAG: [u8; 16] = [0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15]; - -/// All errors that can occur when attempting to parse a VP8 codec inside WebP -#[derive(Debug, Clone, Copy)] -enum DecoderError { - /// VP8's `[0x9D, 0x01, 0x2A]` magic not found or invalid - Vp8MagicInvalid([u8; 3]), - - /// Decoder initialisation wasn't provided with enough data - NotEnoughInitData, - - /// At time of writing, only the YUV colour-space encoded as `0` is specified - ColorSpaceInvalid(u8), - /// LUMA prediction mode was not recognised - LumaPredictionModeInvalid(i8), - /// Intra-prediction mode was not recognised - IntraPredictionModeInvalid(i8), - /// Chroma prediction mode was not recognised - ChromaPredictionModeInvalid(i8), -} - -impl fmt::Display for DecoderError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - DecoderError::Vp8MagicInvalid(tag) => f.write_fmt(format_args!( - "Invalid VP8 magic: [{:#04X?}, {:#04X?}, {:#04X?}]", - tag[0], tag[1], tag[2] - )), - - DecoderError::NotEnoughInitData => { - f.write_str("Expected at least 2 bytes of VP8 decoder initialization data") - } - - DecoderError::ColorSpaceInvalid(cs) => { - f.write_fmt(format_args!("Invalid non-YUV VP8 color space {}", cs)) - } - DecoderError::LumaPredictionModeInvalid(pm) => { - f.write_fmt(format_args!("Invalid VP8 LUMA prediction mode {}", pm)) - } - DecoderError::IntraPredictionModeInvalid(i) => { - f.write_fmt(format_args!("Invalid VP8 intra-prediction mode {}", i)) - } - DecoderError::ChromaPredictionModeInvalid(c) => { - f.write_fmt(format_args!("Invalid VP8 chroma prediction mode {}", c)) - } - } - } -} - -impl From<DecoderError> for ImageError { - fn from(e: DecoderError) -> ImageError { - ImageError::Decoding(DecodingError::new(ImageFormat::WebP.into(), e)) - } -} - -impl error::Error for DecoderError {} - -struct BoolReader { - buf: Vec<u8>, - index: usize, - - range: u32, - value: u32, - bit_count: u8, -} - -impl BoolReader { - pub(crate) fn new() -> BoolReader { - BoolReader { - buf: Vec::new(), - range: 0, - value: 0, - bit_count: 0, - index: 0, - } - } - - pub(crate) fn init(&mut self, buf: Vec<u8>) -> ImageResult<()> { - if buf.len() < 2 { - return Err(DecoderError::NotEnoughInitData.into()); - } - - self.buf = buf; - // Direct access safe, since length has just been validated. - self.value = (u32::from(self.buf[0]) << 8) | u32::from(self.buf[1]); - self.index = 2; - self.range = 255; - self.bit_count = 0; - - Ok(()) - } - - pub(crate) fn read_bool(&mut self, probability: u8) -> bool { - let split = 1 + (((self.range - 1) * u32::from(probability)) >> 8); - let bigsplit = split << 8; - - let retval = if self.value >= bigsplit { - self.range -= split; - self.value -= bigsplit; - true - } else { - self.range = split; - false - }; - - while self.range < 128 { - self.value <<= 1; - self.range <<= 1; - self.bit_count += 1; - - if self.bit_count == 8 { - self.bit_count = 0; - - // If no more bits are available, just don't do anything. - // This strategy is suggested in the reference implementation of RFC6386 (p.135) - if self.index < self.buf.len() { - self.value |= u32::from(self.buf[self.index]); - self.index += 1; - } - } - } - - retval - } - - pub(crate) fn read_literal(&mut self, n: u8) -> u8 { - let mut v = 0u8; - let mut n = n; - - while n != 0 { - v = (v << 1) + self.read_bool(128u8) as u8; - n -= 1; - } - - v - } - - pub(crate) fn read_magnitude_and_sign(&mut self, n: u8) -> i32 { - let magnitude = self.read_literal(n); - let sign = self.read_literal(1); - - if sign == 1 { - -i32::from(magnitude) - } else { - i32::from(magnitude) - } - } - - pub(crate) fn read_with_tree(&mut self, tree: &[i8], probs: &[Prob], start: isize) -> i8 { - let mut index = start; - - loop { - let a = self.read_bool(probs[index as usize >> 1]); - let b = index + a as isize; - index = tree[b as usize] as isize; - - if index <= 0 { - break; - } - } - - -index as i8 - } - - pub(crate) fn read_flag(&mut self) -> bool { - 0 != self.read_literal(1) - } -} - -#[derive(Default, Clone, Copy)] -struct MacroBlock { - bpred: [IntraMode; 16], - complexity: [u8; 9], - luma_mode: LumaMode, - chroma_mode: ChromaMode, - segmentid: u8, - coeffs_skipped: bool, -} - -/// A Representation of the last decoded video frame -#[derive(Default, Debug, Clone)] -pub struct Frame { - /// The width of the luma plane - pub width: u16, - - /// The height of the luma plane - pub height: u16, - - /// The luma plane of the frame - pub ybuf: Vec<u8>, - - /// The blue plane of the frame - pub ubuf: Vec<u8>, - - /// The red plane of the frame - pub vbuf: Vec<u8>, - - /// Indicates whether this frame is a keyframe - pub keyframe: bool, - - version: u8, - - /// Indicates whether this frame is intended for display - pub for_display: bool, - - // Section 9.2 - /// The pixel type of the frame as defined by Section 9.2 - /// of the VP8 Specification - pub pixel_type: u8, - - // Section 9.4 and 15 - filter_type: bool, //if true uses simple filter // if false uses normal filter - filter_level: u8, - sharpness_level: u8, -} - -impl Frame { - /// Chroma plane is half the size of the Luma plane - fn chroma_width(&self) -> u16 { - (self.width + 1) / 2 - } - - fn chroma_height(&self) -> u16 { - (self.height + 1) / 2 - } - - /// Fills an rgb buffer with the image - pub(crate) fn fill_rgb(&self, buf: &mut [u8]) { - for (index, rgb_chunk) in (0..self.ybuf.len()).zip(buf.chunks_exact_mut(3)) { - let y = index / self.width as usize; - let x = index % self.width as usize; - let chroma_index = self.chroma_width() as usize * (y / 2) + x / 2; - - Frame::fill_single( - self.ybuf[index], - self.ubuf[chroma_index], - self.vbuf[chroma_index], - rgb_chunk, - ); - } - } - - /// Fills an rgba buffer by skipping the alpha values - pub(crate) fn fill_rgba(&self, buf: &mut [u8]) { - for (index, rgba_chunk) in (0..self.ybuf.len()).zip(buf.chunks_exact_mut(4)) { - let y = index / self.width as usize; - let x = index % self.width as usize; - let chroma_index = self.chroma_width() as usize * (y / 2) + x / 2; - - Frame::fill_single( - self.ybuf[index], - self.ubuf[chroma_index], - self.vbuf[chroma_index], - rgba_chunk, - ); - } - } - - /// Conversion values from https://docs.microsoft.com/en-us/windows/win32/medfound/recommended-8-bit-yuv-formats-for-video-rendering#converting-8-bit-yuv-to-rgb888 - fn fill_single(y: u8, u: u8, v: u8, rgb: &mut [u8]) { - let c: i32 = i32::from(y) - 16; - let d: i32 = i32::from(u) - 128; - let e: i32 = i32::from(v) - 128; - - let r: u8 = clamp((298 * c + 409 * e + 128) >> 8, 0, 255) - .try_into() - .unwrap(); - let g: u8 = clamp((298 * c - 100 * d - 208 * e + 128) >> 8, 0, 255) - .try_into() - .unwrap(); - let b: u8 = clamp((298 * c + 516 * d + 128) >> 8, 0, 255) - .try_into() - .unwrap(); - - rgb[0] = r; - rgb[1] = g; - rgb[2] = b; - } - - /// Gets the buffer size - pub fn get_buf_size(&self) -> usize { - self.ybuf.len() * 3 - } -} - -#[derive(Clone, Copy, Default)] -struct Segment { - ydc: i16, - yac: i16, - - y2dc: i16, - y2ac: i16, - - uvdc: i16, - uvac: i16, - - delta_values: bool, - - quantizer_level: i8, - loopfilter_level: i8, -} - -/// VP8 Decoder -/// -/// Only decodes keyframes -pub struct Vp8Decoder<R> { - r: R, - b: BoolReader, - - mbwidth: u16, - mbheight: u16, - macroblocks: Vec<MacroBlock>, - - frame: Frame, - - segments_enabled: bool, - segments_update_map: bool, - segment: [Segment; MAX_SEGMENTS], - - ref_delta: [i32; 4], - mode_delta: [i32; 4], - - partitions: [BoolReader; 8], - num_partitions: u8, - - segment_tree_probs: [Prob; 3], - token_probs: Box<TokenProbTables>, - - // Section 9.10 - prob_intra: Prob, - - // Section 9.11 - prob_skip_false: Option<Prob>, - - top: Vec<MacroBlock>, - left: MacroBlock, - - top_border: Vec<u8>, - left_border: Vec<u8>, -} - -impl<R: Read> Vp8Decoder<R> { - /// Create a new decoder. - /// The reader must present a raw vp8 bitstream to the decoder - pub fn new(r: R) -> Vp8Decoder<R> { - let f = Frame::default(); - let s = Segment::default(); - let m = MacroBlock::default(); - - Vp8Decoder { - r, - b: BoolReader::new(), - - mbwidth: 0, - mbheight: 0, - macroblocks: Vec::new(), - - frame: f, - segments_enabled: false, - segments_update_map: false, - segment: [s; MAX_SEGMENTS], - - ref_delta: [0; 4], - mode_delta: [0; 4], - - partitions: [ - BoolReader::new(), - BoolReader::new(), - BoolReader::new(), - BoolReader::new(), - BoolReader::new(), - BoolReader::new(), - BoolReader::new(), - BoolReader::new(), - ], - - num_partitions: 1, - - segment_tree_probs: [255u8; 3], - token_probs: Box::new(COEFF_PROBS), - - // Section 9.10 - prob_intra: 0u8, - - // Section 9.11 - prob_skip_false: None, - - top: Vec::new(), - left: m, - - top_border: Vec::new(), - left_border: Vec::new(), - } - } - - fn update_token_probabilities(&mut self) { - for (i, is) in COEFF_UPDATE_PROBS.iter().enumerate() { - for (j, js) in is.iter().enumerate() { - for (k, ks) in js.iter().enumerate() { - for (t, prob) in ks.iter().enumerate().take(NUM_DCT_TOKENS - 1) { - if self.b.read_bool(*prob) { - let v = self.b.read_literal(8); - self.token_probs[i][j][k][t] = v; - } - } - } - } - } - } - - fn init_partitions(&mut self, n: usize) -> ImageResult<()> { - if n > 1 { - let mut sizes = vec![0; 3 * n - 3]; - self.r.read_exact(sizes.as_mut_slice())?; - - for (i, s) in sizes.chunks(3).enumerate() { - let size = { s } - .read_u24::<LittleEndian>() - .expect("Reading from &[u8] can't fail and the chunk is complete"); - - let mut buf = vec![0; size as usize]; - self.r.read_exact(buf.as_mut_slice())?; - - self.partitions[i].init(buf)?; - } - } - - let mut buf = Vec::new(); - self.r.read_to_end(&mut buf)?; - self.partitions[n - 1].init(buf)?; - - Ok(()) - } - - fn read_quantization_indices(&mut self) { - fn dc_quant(index: i32) -> i16 { - DC_QUANT[clamp(index, 0, 127) as usize] - } - - fn ac_quant(index: i32) -> i16 { - AC_QUANT[clamp(index, 0, 127) as usize] - } - - let yac_abs = self.b.read_literal(7); - let ydc_delta = if self.b.read_flag() { - self.b.read_magnitude_and_sign(4) - } else { - 0 - }; - - let y2dc_delta = if self.b.read_flag() { - self.b.read_magnitude_and_sign(4) - } else { - 0 - }; - - let y2ac_delta = if self.b.read_flag() { - self.b.read_magnitude_and_sign(4) - } else { - 0 - }; - - let uvdc_delta = if self.b.read_flag() { - self.b.read_magnitude_and_sign(4) - } else { - 0 - }; - - let uvac_delta = if self.b.read_flag() { - self.b.read_magnitude_and_sign(4) - } else { - 0 - }; - - let n = if self.segments_enabled { - MAX_SEGMENTS - } else { - 1 - }; - for i in 0usize..n { - let base = i32::from(if !self.segment[i].delta_values { - i16::from(self.segment[i].quantizer_level) - } else { - i16::from(self.segment[i].quantizer_level) + i16::from(yac_abs) - }); - - self.segment[i].ydc = dc_quant(base + ydc_delta); - self.segment[i].yac = ac_quant(base); - - self.segment[i].y2dc = dc_quant(base + y2dc_delta) * 2; - // The intermediate result (max`284*155`) can be larger than the `i16` range. - self.segment[i].y2ac = (i32::from(ac_quant(base + y2ac_delta)) * 155 / 100) as i16; - - self.segment[i].uvdc = dc_quant(base + uvdc_delta); - self.segment[i].uvac = ac_quant(base + uvac_delta); - - if self.segment[i].y2ac < 8 { - self.segment[i].y2ac = 8; - } - - if self.segment[i].uvdc > 132 { - self.segment[i].uvdc = 132; - } - } - } - - fn read_loop_filter_adjustments(&mut self) { - if self.b.read_flag() { - for i in 0usize..4 { - let ref_frame_delta_update_flag = self.b.read_flag(); - - self.ref_delta[i] = if ref_frame_delta_update_flag { - self.b.read_magnitude_and_sign(6) - } else { - 0i32 - }; - } - - for i in 0usize..4 { - let mb_mode_delta_update_flag = self.b.read_flag(); - - self.mode_delta[i] = if mb_mode_delta_update_flag { - self.b.read_magnitude_and_sign(6) - } else { - 0i32 - }; - } - } - } - - fn read_segment_updates(&mut self) { - // Section 9.3 - self.segments_update_map = self.b.read_flag(); - let update_segment_feature_data = self.b.read_flag(); - - if update_segment_feature_data { - let segment_feature_mode = self.b.read_flag(); - - for i in 0usize..MAX_SEGMENTS { - self.segment[i].delta_values = !segment_feature_mode; - } - - for i in 0usize..MAX_SEGMENTS { - let update = self.b.read_flag(); - - self.segment[i].quantizer_level = if update { - self.b.read_magnitude_and_sign(7) - } else { - 0i32 - } as i8; - } - - for i in 0usize..MAX_SEGMENTS { - let update = self.b.read_flag(); - - self.segment[i].loopfilter_level = if update { - self.b.read_magnitude_and_sign(6) - } else { - 0i32 - } as i8; - } - } - - if self.segments_update_map { - for i in 0usize..3 { - let update = self.b.read_flag(); - - self.segment_tree_probs[i] = if update { self.b.read_literal(8) } else { 255 }; - } - } - } - - fn read_frame_header(&mut self) -> ImageResult<()> { - let tag = self.r.read_u24::<LittleEndian>()?; - - self.frame.keyframe = tag & 1 == 0; - self.frame.version = ((tag >> 1) & 7) as u8; - self.frame.for_display = (tag >> 4) & 1 != 0; - - let first_partition_size = tag >> 5; - - if self.frame.keyframe { - let mut tag = [0u8; 3]; - self.r.read_exact(&mut tag)?; - - if tag != [0x9d, 0x01, 0x2a] { - return Err(DecoderError::Vp8MagicInvalid(tag).into()); - } - - let w = self.r.read_u16::<LittleEndian>()?; - let h = self.r.read_u16::<LittleEndian>()?; - - self.frame.width = w & 0x3FFF; - self.frame.height = h & 0x3FFF; - - self.top = init_top_macroblocks(self.frame.width as usize); - // Almost always the first macro block, except when non exists (i.e. `width == 0`) - self.left = self.top.get(0).cloned().unwrap_or_default(); - - self.mbwidth = (self.frame.width + 15) / 16; - self.mbheight = (self.frame.height + 15) / 16; - - self.frame.ybuf = vec![0u8; self.frame.width as usize * self.frame.height as usize]; - self.frame.ubuf = - vec![0u8; self.frame.chroma_width() as usize * self.frame.chroma_height() as usize]; - self.frame.vbuf = - vec![0u8; self.frame.chroma_width() as usize * self.frame.chroma_height() as usize]; - - self.top_border = vec![127u8; self.frame.width as usize + 4 + 16]; - self.left_border = vec![129u8; 1 + 16]; - } - - let mut buf = vec![0; first_partition_size as usize]; - self.r.read_exact(&mut buf)?; - - // initialise binary decoder - self.b.init(buf)?; - - if self.frame.keyframe { - let color_space = self.b.read_literal(1); - self.frame.pixel_type = self.b.read_literal(1); - - if color_space != 0 { - return Err(DecoderError::ColorSpaceInvalid(color_space).into()); - } - } - - self.segments_enabled = self.b.read_flag(); - if self.segments_enabled { - self.read_segment_updates(); - } - - self.frame.filter_type = self.b.read_flag(); - self.frame.filter_level = self.b.read_literal(6); - self.frame.sharpness_level = self.b.read_literal(3); - - let lf_adjust_enable = self.b.read_flag(); - if lf_adjust_enable { - self.read_loop_filter_adjustments(); - } - - self.num_partitions = (1usize << self.b.read_literal(2) as usize) as u8; - let num_partitions = self.num_partitions as usize; - self.init_partitions(num_partitions)?; - - self.read_quantization_indices(); - - if !self.frame.keyframe { - // 9.7 refresh golden frame and altref frame - // FIXME: support this? - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::WebP.into(), - UnsupportedErrorKind::GenericFeature("Non-keyframe frames".to_owned()), - ), - )); - } else { - // Refresh entropy probs ????? - let _ = self.b.read_literal(1); - } - - self.update_token_probabilities(); - - let mb_no_skip_coeff = self.b.read_literal(1); - self.prob_skip_false = if mb_no_skip_coeff == 1 { - Some(self.b.read_literal(8)) - } else { - None - }; - - if !self.frame.keyframe { - // 9.10 remaining frame data - self.prob_intra = 0; - - // FIXME: support this? - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::WebP.into(), - UnsupportedErrorKind::GenericFeature("Non-keyframe frames".to_owned()), - ), - )); - } else { - // Reset motion vectors - } - - Ok(()) - } - - fn read_macroblock_header(&mut self, mbx: usize) -> ImageResult<MacroBlock> { - let mut mb = MacroBlock::default(); - - if self.segments_enabled && self.segments_update_map { - mb.segmentid = self - .b - .read_with_tree(&SEGMENT_ID_TREE, &self.segment_tree_probs, 0) - as u8; - }; - - mb.coeffs_skipped = if self.prob_skip_false.is_some() { - self.b.read_bool(*self.prob_skip_false.as_ref().unwrap()) - } else { - false - }; - - let inter_predicted = if !self.frame.keyframe { - self.b.read_bool(self.prob_intra) - } else { - false - }; - - if inter_predicted { - return Err(ImageError::Unsupported( - UnsupportedError::from_format_and_kind( - ImageFormat::WebP.into(), - UnsupportedErrorKind::GenericFeature("VP8 inter-prediction".to_owned()), - ), - )); - } - - if self.frame.keyframe { - // intra prediction - let luma = self - .b - .read_with_tree(&KEYFRAME_YMODE_TREE, &KEYFRAME_YMODE_PROBS, 0); - mb.luma_mode = - LumaMode::from_i8(luma).ok_or(DecoderError::LumaPredictionModeInvalid(luma))?; - - match mb.luma_mode.into_intra() { - // `LumaMode::B` - This is predicted individually - None => { - for y in 0usize..4 { - for x in 0usize..4 { - let top = self.top[mbx].bpred[12 + x]; - let left = self.left.bpred[y]; - let intra = self.b.read_with_tree( - &KEYFRAME_BPRED_MODE_TREE, - &KEYFRAME_BPRED_MODE_PROBS[top as usize][left as usize], - 0, - ); - let bmode = IntraMode::from_i8(intra) - .ok_or(DecoderError::IntraPredictionModeInvalid(intra))?; - mb.bpred[x + y * 4] = bmode; - - self.top[mbx].bpred[12 + x] = bmode; - self.left.bpred[y] = bmode; - } - } - } - Some(mode) => { - for i in 0usize..4 { - mb.bpred[12 + i] = mode; - self.left.bpred[i] = mode; - } - } - } - - let chroma = self - .b - .read_with_tree(&KEYFRAME_UV_MODE_TREE, &KEYFRAME_UV_MODE_PROBS, 0); - mb.chroma_mode = ChromaMode::from_i8(chroma) - .ok_or(DecoderError::ChromaPredictionModeInvalid(chroma))?; - } - - self.top[mbx].chroma_mode = mb.chroma_mode; - self.top[mbx].luma_mode = mb.luma_mode; - self.top[mbx].bpred = mb.bpred; - - Ok(mb) - } - - fn intra_predict_luma(&mut self, mbx: usize, mby: usize, mb: &MacroBlock, resdata: &[i32]) { - let stride = 1usize + 16 + 4; - let w = self.frame.width as usize; - let mw = self.mbwidth as usize; - let mut ws = create_border_luma(mbx, mby, mw, &self.top_border, &self.left_border); - - match mb.luma_mode { - LumaMode::V => predict_vpred(&mut ws, 16, 1, 1, stride), - LumaMode::H => predict_hpred(&mut ws, 16, 1, 1, stride), - LumaMode::TM => predict_tmpred(&mut ws, 16, 1, 1, stride), - LumaMode::DC => predict_dcpred(&mut ws, 16, stride, mby != 0, mbx != 0), - LumaMode::B => predict_4x4(&mut ws, stride, &mb.bpred, resdata), - } - - if mb.luma_mode != LumaMode::B { - for y in 0usize..4 { - for x in 0usize..4 { - let i = x + y * 4; - // Create a reference to a [i32; 16] array for add_residue (slices of size 16 do not work). - let rb: &[i32; 16] = resdata[i * 16..][..16].try_into().unwrap(); - let y0 = 1 + y * 4; - let x0 = 1 + x * 4; - - add_residue(&mut ws, rb, y0, x0, stride); - } - } - } - - self.left_border[0] = ws[16]; - - for i in 0usize..16 { - self.top_border[mbx * 16 + i] = ws[16 * stride + 1 + i]; - self.left_border[i + 1] = ws[(i + 1) * stride + 16]; - } - - // Length is the remainder to the border, but maximally the current chunk. - let ylength = cmp::min(self.frame.height as usize - mby * 16, 16); - let xlength = cmp::min(self.frame.width as usize - mbx * 16, 16); - - for y in 0usize..ylength { - for x in 0usize..xlength { - self.frame.ybuf[(mby * 16 + y) * w + mbx * 16 + x] = ws[(1 + y) * stride + 1 + x]; - } - } - } - - fn intra_predict_chroma(&mut self, mbx: usize, mby: usize, mb: &MacroBlock, resdata: &[i32]) { - let stride = 1usize + 8; - - let w = self.frame.chroma_width() as usize; - - //8x8 with left top border of 1 - let mut uws = [0u8; (8 + 1) * (8 + 1)]; - let mut vws = [0u8; (8 + 1) * (8 + 1)]; - - let ylength = cmp::min(self.frame.chroma_height() as usize - mby * 8, 8); - let xlength = cmp::min(self.frame.chroma_width() as usize - mbx * 8, 8); - - //left border - for y in 0usize..8 { - let (uy, vy) = if mbx == 0 || y >= ylength { - (129, 129) - } else { - let index = (mby * 8 + y) * w + ((mbx - 1) * 8 + 7); - (self.frame.ubuf[index], self.frame.vbuf[index]) - }; - - uws[(y + 1) * stride] = uy; - vws[(y + 1) * stride] = vy; - } - //top border - for x in 0usize..8 { - let (ux, vx) = if mby == 0 || x >= xlength { - (127, 127) - } else { - let index = ((mby - 1) * 8 + 7) * w + (mbx * 8 + x); - (self.frame.ubuf[index], self.frame.vbuf[index]) - }; - - uws[x + 1] = ux; - vws[x + 1] = vx; - } - - //top left point - let (u1, v1) = if mby == 0 { - (127, 127) - } else if mbx == 0 { - (129, 129) - } else { - let index = ((mby - 1) * 8 + 7) * w + (mbx - 1) * 8 + 7; - if index >= self.frame.ubuf.len() { - (127, 127) - } else { - (self.frame.ubuf[index], self.frame.vbuf[index]) - } - }; - - uws[0] = u1; - vws[0] = v1; - - match mb.chroma_mode { - ChromaMode::DC => { - predict_dcpred(&mut uws, 8, stride, mby != 0, mbx != 0); - predict_dcpred(&mut vws, 8, stride, mby != 0, mbx != 0); - } - ChromaMode::V => { - predict_vpred(&mut uws, 8, 1, 1, stride); - predict_vpred(&mut vws, 8, 1, 1, stride); - } - ChromaMode::H => { - predict_hpred(&mut uws, 8, 1, 1, stride); - predict_hpred(&mut vws, 8, 1, 1, stride); - } - ChromaMode::TM => { - predict_tmpred(&mut uws, 8, 1, 1, stride); - predict_tmpred(&mut vws, 8, 1, 1, stride); - } - } - - for y in 0usize..2 { - for x in 0usize..2 { - let i = x + y * 2; - let urb: &[i32; 16] = resdata[16 * 16 + i * 16..][..16].try_into().unwrap(); - - let y0 = 1 + y * 4; - let x0 = 1 + x * 4; - add_residue(&mut uws, urb, y0, x0, stride); - - let vrb: &[i32; 16] = resdata[20 * 16 + i * 16..][..16].try_into().unwrap(); - - add_residue(&mut vws, vrb, y0, x0, stride); - } - } - - for y in 0usize..ylength { - for x in 0usize..xlength { - self.frame.ubuf[(mby * 8 + y) * w + mbx * 8 + x] = uws[(1 + y) * stride + 1 + x]; - self.frame.vbuf[(mby * 8 + y) * w + mbx * 8 + x] = vws[(1 + y) * stride + 1 + x]; - } - } - } - - fn read_coefficients( - &mut self, - block: &mut [i32], - p: usize, - plane: usize, - complexity: usize, - dcq: i16, - acq: i16, - ) -> bool { - let first = if plane == 0 { 1usize } else { 0usize }; - let probs = &self.token_probs[plane]; - let tree = &DCT_TOKEN_TREE; - - let mut complexity = complexity; - let mut has_coefficients = false; - let mut skip = false; - - for i in first..16usize { - let table = &probs[COEFF_BANDS[i] as usize][complexity]; - - let token = if !skip { - self.partitions[p].read_with_tree(tree, table, 0) - } else { - self.partitions[p].read_with_tree(tree, table, 2) - }; - - let mut abs_value = i32::from(match token { - DCT_EOB => break, - - DCT_0 => { - skip = true; - has_coefficients = true; - complexity = 0; - continue; - } - - literal @ DCT_1..=DCT_4 => i16::from(literal), - - category @ DCT_CAT1..=DCT_CAT6 => { - let t = PROB_DCT_CAT[(category - DCT_CAT1) as usize]; - - let mut extra = 0i16; - let mut j = 0; - - while t[j] > 0 { - extra = extra + extra + self.partitions[p].read_bool(t[j]) as i16; - j += 1; - } - - i16::from(DCT_CAT_BASE[(category - DCT_CAT1) as usize]) + extra - } - - c => panic!("unknown token: {}", c), - }); - - skip = false; - - complexity = if abs_value == 0 { - 0 - } else if abs_value == 1 { - 1 - } else { - 2 - }; - - if self.partitions[p].read_bool(128) { - abs_value = -abs_value; - } - - block[ZIGZAG[i] as usize] = - abs_value * i32::from(if ZIGZAG[i] > 0 { acq } else { dcq }); - - has_coefficients = true; - } - - has_coefficients - } - - fn read_residual_data(&mut self, mb: &MacroBlock, mbx: usize, p: usize) -> [i32; 384] { - let sindex = mb.segmentid as usize; - let mut blocks = [0i32; 384]; - let mut plane = if mb.luma_mode == LumaMode::B { 3 } else { 1 }; - - if plane == 1 { - let complexity = self.top[mbx].complexity[0] + self.left.complexity[0]; - let mut block = [0i32; 16]; - let dcq = self.segment[sindex].y2dc; - let acq = self.segment[sindex].y2ac; - let n = self.read_coefficients(&mut block, p, plane, complexity as usize, dcq, acq); - - self.left.complexity[0] = if n { 1 } else { 0 }; - self.top[mbx].complexity[0] = if n { 1 } else { 0 }; - - transform::iwht4x4(&mut block); - - for k in 0usize..16 { - blocks[16 * k] = block[k]; - } - - plane = 0; - } - - for y in 0usize..4 { - let mut left = self.left.complexity[y + 1]; - for x in 0usize..4 { - let i = x + y * 4; - let block = &mut blocks[i * 16..i * 16 + 16]; - - let complexity = self.top[mbx].complexity[x + 1] + left; - let dcq = self.segment[sindex].ydc; - let acq = self.segment[sindex].yac; - - let n = self.read_coefficients(block, p, plane, complexity as usize, dcq, acq); - - if block[0] != 0 || n { - transform::idct4x4(block); - } - - left = if n { 1 } else { 0 }; - self.top[mbx].complexity[x + 1] = if n { 1 } else { 0 }; - } - - self.left.complexity[y + 1] = left; - } - - plane = 2; - - for &j in &[5usize, 7usize] { - for y in 0usize..2 { - let mut left = self.left.complexity[y + j]; - - for x in 0usize..2 { - let i = x + y * 2 + if j == 5 { 16 } else { 20 }; - let block = &mut blocks[i * 16..i * 16 + 16]; - - let complexity = self.top[mbx].complexity[x + j] + left; - let dcq = self.segment[sindex].uvdc; - let acq = self.segment[sindex].uvac; - - let n = self.read_coefficients(block, p, plane, complexity as usize, dcq, acq); - if block[0] != 0 || n { - transform::idct4x4(block); - } - - left = if n { 1 } else { 0 }; - self.top[mbx].complexity[x + j] = if n { 1 } else { 0 }; - } - - self.left.complexity[y + j] = left; - } - } - - blocks - } - - /// Does loop filtering on the macroblock - fn loop_filter(&mut self, mbx: usize, mby: usize, mb: &MacroBlock) { - let luma_w = self.frame.width as usize; - let luma_h = self.frame.height as usize; - let chroma_w = self.frame.chroma_width() as usize; - let chroma_h = self.frame.chroma_height() as usize; - - let (filter_level, interior_limit, hev_threshold) = self.calculate_filter_parameters(mb); - - if filter_level > 0 { - let mbedge_limit = (filter_level + 2) * 2 + interior_limit; - let sub_bedge_limit = (filter_level * 2) + interior_limit; - - let luma_ylength = cmp::min(luma_h - 16 * mby, 16); - let luma_xlength = cmp::min(luma_w - 16 * mbx, 16); - - let chroma_ylength = cmp::min(chroma_h - 8 * mby, 8); - let chroma_xlength = cmp::min(chroma_w - 8 * mbx, 8); - - //filter across left of macroblock - if mbx > 0 { - //simple loop filtering - if self.frame.filter_type { - if luma_xlength >= 2 { - for y in 0usize..luma_ylength { - let y0 = mby * 16 + y; - let x0 = mbx * 16; - - loop_filter::simple_segment( - mbedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - 1, - ); - } - } - } else { - if luma_xlength >= 4 { - for y in 0usize..luma_ylength { - let y0 = mby * 16 + y; - let x0 = mbx * 16; - - loop_filter::macroblock_filter( - hev_threshold, - interior_limit, - mbedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - 1, - ); - } - } - - if chroma_xlength >= 4 { - for y in 0usize..chroma_ylength { - let y0 = mby * 8 + y; - let x0 = mbx * 8; - - loop_filter::macroblock_filter( - hev_threshold, - interior_limit, - mbedge_limit, - &mut self.frame.ubuf[..], - y0 * chroma_w + x0, - 1, - ); - loop_filter::macroblock_filter( - hev_threshold, - interior_limit, - mbedge_limit, - &mut self.frame.vbuf[..], - y0 * chroma_w + x0, - 1, - ); - } - } - } - } - - //filter across vertical subblocks in macroblock - if mb.luma_mode == LumaMode::B || !mb.coeffs_skipped { - if self.frame.filter_type { - for x in (4usize..luma_xlength - 1).step_by(4) { - for y in 0..luma_ylength { - let y0 = mby * 16 + y; - let x0 = mbx * 16 + x; - - loop_filter::simple_segment( - sub_bedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - 1, - ); - } - } - } else { - if luma_xlength > 3 { - for x in (4usize..luma_xlength - 3).step_by(4) { - for y in 0..luma_ylength { - let y0 = mby * 16 + y; - let x0 = mbx * 16 + x; - - loop_filter::subblock_filter( - hev_threshold, - interior_limit, - sub_bedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - 1, - ); - } - } - } - - if chroma_xlength == 8 { - for y in 0usize..chroma_ylength { - let y0 = mby * 8 + y; - let x0 = mbx * 8 + 4; - - loop_filter::subblock_filter( - hev_threshold, - interior_limit, - sub_bedge_limit, - &mut self.frame.ubuf[..], - y0 * chroma_w + x0, - 1, - ); - - loop_filter::subblock_filter( - hev_threshold, - interior_limit, - sub_bedge_limit, - &mut self.frame.vbuf[..], - y0 * chroma_w + x0, - 1, - ); - } - } - } - } - - //filter across top of macroblock - if mby > 0 { - if self.frame.filter_type { - if luma_ylength >= 2 { - for x in 0usize..luma_xlength { - let y0 = mby * 16; - let x0 = mbx * 16 + x; - - loop_filter::simple_segment( - mbedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - luma_w, - ); - } - } - } else { - //if bottom macroblock, can only filter if there is 3 pixels below - if luma_ylength >= 4 { - for x in 0usize..luma_xlength { - let y0 = mby * 16; - let x0 = mbx * 16 + x; - - loop_filter::macroblock_filter( - hev_threshold, - interior_limit, - mbedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - luma_w, - ); - } - } - - if chroma_ylength >= 4 { - for x in 0usize..chroma_xlength { - let y0 = mby * 8; - let x0 = mbx * 8 + x; - - loop_filter::macroblock_filter( - hev_threshold, - interior_limit, - mbedge_limit, - &mut self.frame.ubuf[..], - y0 * chroma_w + x0, - chroma_w, - ); - loop_filter::macroblock_filter( - hev_threshold, - interior_limit, - mbedge_limit, - &mut self.frame.vbuf[..], - y0 * chroma_w + x0, - chroma_w, - ); - } - } - } - } - - //filter across horizontal subblock edges within the macroblock - if mb.luma_mode == LumaMode::B || !mb.coeffs_skipped { - if self.frame.filter_type { - for y in (4usize..luma_ylength - 1).step_by(4) { - for x in 0..luma_xlength { - let y0 = mby * 16 + y; - let x0 = mbx * 16 + x; - - loop_filter::simple_segment( - sub_bedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - luma_w, - ); - } - } - } else { - if luma_ylength > 3 { - for y in (4usize..luma_ylength - 3).step_by(4) { - for x in 0..luma_xlength { - let y0 = mby * 16 + y; - let x0 = mbx * 16 + x; - - loop_filter::subblock_filter( - hev_threshold, - interior_limit, - sub_bedge_limit, - &mut self.frame.ybuf[..], - y0 * luma_w + x0, - luma_w, - ); - } - } - } - - if chroma_ylength == 8 { - for x in 0..chroma_xlength { - let y0 = mby * 8 + 4; - let x0 = mbx * 8 + x; - - loop_filter::subblock_filter( - hev_threshold, - interior_limit, - sub_bedge_limit, - &mut self.frame.ubuf[..], - y0 * chroma_w + x0, - chroma_w, - ); - - loop_filter::subblock_filter( - hev_threshold, - interior_limit, - sub_bedge_limit, - &mut self.frame.vbuf[..], - y0 * chroma_w + x0, - chroma_w, - ); - } - } - } - } - } - } - - //return values are the filter level, interior limit and hev threshold - fn calculate_filter_parameters(&self, macroblock: &MacroBlock) -> (u8, u8, u8) { - let segment = self.segment[macroblock.segmentid as usize]; - let mut filter_level = self.frame.filter_level as i32; - - if self.segments_enabled { - if segment.delta_values { - filter_level += i32::from(segment.loopfilter_level); - } else { - filter_level = i32::from(segment.loopfilter_level); - } - } - - filter_level = clamp(filter_level, 0, 63); - - if macroblock.luma_mode == LumaMode::B { - filter_level += self.mode_delta[0]; - } - - let filter_level = clamp(filter_level, 0, 63) as u8; - - //interior limit - let mut interior_limit = filter_level; - - if self.frame.sharpness_level > 0 { - interior_limit >>= if self.frame.sharpness_level > 4 { 2 } else { 1 }; - - if interior_limit > 9 - self.frame.sharpness_level { - interior_limit = 9 - self.frame.sharpness_level; - } - } - - if interior_limit == 0 { - interior_limit = 1; - } - - //high edge variance threshold - let mut hev_threshold = 0; - - #[allow(clippy::collapsible_else_if)] - if self.frame.keyframe { - if filter_level >= 40 { - hev_threshold = 2; - } else { - hev_threshold = 1; - } - } else { - if filter_level >= 40 { - hev_threshold = 3; - } else if filter_level >= 20 { - hev_threshold = 2; - } else if filter_level >= 15 { - hev_threshold = 1; - } - } - - (filter_level, interior_limit, hev_threshold) - } - - /// Decodes the current frame - pub fn decode_frame(&mut self) -> ImageResult<&Frame> { - self.read_frame_header()?; - - for mby in 0..self.mbheight as usize { - let p = mby % self.num_partitions as usize; - self.left = MacroBlock::default(); - - for mbx in 0..self.mbwidth as usize { - let mb = self.read_macroblock_header(mbx)?; - let blocks = if !mb.coeffs_skipped { - self.read_residual_data(&mb, mbx, p) - } else { - if mb.luma_mode != LumaMode::B { - self.left.complexity[0] = 0; - self.top[mbx].complexity[0] = 0; - } - - for i in 1usize..9 { - self.left.complexity[i] = 0; - self.top[mbx].complexity[i] = 0; - } - - [0i32; 384] - }; - - self.intra_predict_luma(mbx, mby, &mb, &blocks); - self.intra_predict_chroma(mbx, mby, &mb, &blocks); - - self.macroblocks.push(mb); - } - - self.left_border = vec![129u8; 1 + 16]; - } - - //do loop filtering - for mby in 0..self.mbheight as usize { - for mbx in 0..self.mbwidth as usize { - let mb = self.macroblocks[mby * self.mbwidth as usize + mbx]; - self.loop_filter(mbx, mby, &mb); - } - } - - Ok(&self.frame) - } -} - -impl LumaMode { - fn from_i8(val: i8) -> Option<Self> { - Some(match val { - DC_PRED => LumaMode::DC, - V_PRED => LumaMode::V, - H_PRED => LumaMode::H, - TM_PRED => LumaMode::TM, - B_PRED => LumaMode::B, - _ => return None, - }) - } - - fn into_intra(self) -> Option<IntraMode> { - Some(match self { - LumaMode::DC => IntraMode::DC, - LumaMode::V => IntraMode::VE, - LumaMode::H => IntraMode::HE, - LumaMode::TM => IntraMode::TM, - LumaMode::B => return None, - }) - } -} - -impl Default for LumaMode { - fn default() -> Self { - LumaMode::DC - } -} - -impl ChromaMode { - fn from_i8(val: i8) -> Option<Self> { - Some(match val { - DC_PRED => ChromaMode::DC, - V_PRED => ChromaMode::V, - H_PRED => ChromaMode::H, - TM_PRED => ChromaMode::TM, - _ => return None, - }) - } -} - -impl Default for ChromaMode { - fn default() -> Self { - ChromaMode::DC - } -} - -impl IntraMode { - fn from_i8(val: i8) -> Option<Self> { - Some(match val { - B_DC_PRED => IntraMode::DC, - B_TM_PRED => IntraMode::TM, - B_VE_PRED => IntraMode::VE, - B_HE_PRED => IntraMode::HE, - B_LD_PRED => IntraMode::LD, - B_RD_PRED => IntraMode::RD, - B_VR_PRED => IntraMode::VR, - B_VL_PRED => IntraMode::VL, - B_HD_PRED => IntraMode::HD, - B_HU_PRED => IntraMode::HU, - _ => return None, - }) - } -} - -impl Default for IntraMode { - fn default() -> Self { - IntraMode::DC - } -} - -fn init_top_macroblocks(width: usize) -> Vec<MacroBlock> { - let mb_width = (width + 15) / 16; - - let mb = MacroBlock { - // Section 11.3 #3 - bpred: [IntraMode::DC; 16], - luma_mode: LumaMode::DC, - ..MacroBlock::default() - }; - - vec![mb; mb_width] -} - -fn create_border_luma(mbx: usize, mby: usize, mbw: usize, top: &[u8], left: &[u8]) -> [u8; 357] { - let stride = 1usize + 16 + 4; - let mut ws = [0u8; (1 + 16) * (1 + 16 + 4)]; - - // A - { - let above = &mut ws[1..stride]; - if mby == 0 { - for above in above.iter_mut() { - *above = 127; - } - } else { - for i in 0usize..16 { - above[i] = top[mbx * 16 + i]; - } - - if mbx == mbw - 1 { - for above in above.iter_mut().skip(16) { - *above = top[mbx * 16 + 15]; - } - } else { - for i in 16usize..above.len() { - above[i] = top[mbx * 16 + i]; - } - } - } - } - - for i in 17usize..stride { - ws[4 * stride + i] = ws[i]; - ws[8 * stride + i] = ws[i]; - ws[12 * stride + i] = ws[i]; - } - - // L - if mbx == 0 { - for i in 0usize..16 { - ws[(i + 1) * stride] = 129; - } - } else { - for i in 0usize..16 { - ws[(i + 1) * stride] = left[i + 1]; - } - } - - // P - ws[0] = if mby == 0 { - 127 - } else if mbx == 0 { - 129 - } else { - left[0] - }; - - ws -} - -fn avg3(left: u8, this: u8, right: u8) -> u8 { - let avg = (u16::from(left) + 2 * u16::from(this) + u16::from(right) + 2) >> 2; - avg as u8 -} - -fn avg2(this: u8, right: u8) -> u8 { - let avg = (u16::from(this) + u16::from(right) + 1) >> 1; - avg as u8 -} - -// Only 16 elements from rblock are used to add residue, so it is restricted to 16 elements -// to enable SIMD and other optimizations. -fn add_residue(pblock: &mut [u8], rblock: &[i32; 16], y0: usize, x0: usize, stride: usize) { - let mut pos = y0 * stride + x0; - for row in rblock.chunks(4) { - for (p, &a) in pblock[pos..pos + 4].iter_mut().zip(row.iter()) { - *p = clamp(a + i32::from(*p), 0, 255) as u8; - } - pos += stride; - } -} - -fn predict_4x4(ws: &mut [u8], stride: usize, modes: &[IntraMode], resdata: &[i32]) { - for sby in 0usize..4 { - for sbx in 0usize..4 { - let i = sbx + sby * 4; - let y0 = sby * 4 + 1; - let x0 = sbx * 4 + 1; - - match modes[i] { - IntraMode::TM => predict_tmpred(ws, 4, x0, y0, stride), - IntraMode::VE => predict_bvepred(ws, x0, y0, stride), - IntraMode::HE => predict_bhepred(ws, x0, y0, stride), - IntraMode::DC => predict_bdcpred(ws, x0, y0, stride), - IntraMode::LD => predict_bldpred(ws, x0, y0, stride), - IntraMode::RD => predict_brdpred(ws, x0, y0, stride), - IntraMode::VR => predict_bvrpred(ws, x0, y0, stride), - IntraMode::VL => predict_bvlpred(ws, x0, y0, stride), - IntraMode::HD => predict_bhdpred(ws, x0, y0, stride), - IntraMode::HU => predict_bhupred(ws, x0, y0, stride), - } - - let rb: &[i32; 16] = resdata[i * 16..][..16].try_into().unwrap(); - add_residue(ws, rb, y0, x0, stride); - } - } -} - -fn predict_vpred(a: &mut [u8], size: usize, x0: usize, y0: usize, stride: usize) { - for y in 0usize..size { - for x in 0usize..size { - a[(x + x0) + stride * (y + y0)] = a[(x + x0) + stride * (y0 + y - 1)]; - } - } -} - -fn predict_hpred(a: &mut [u8], size: usize, x0: usize, y0: usize, stride: usize) { - for y in 0usize..size { - for x in 0usize..size { - a[(x + x0) + stride * (y + y0)] = a[(x + x0 - 1) + stride * (y0 + y)]; - } - } -} - -fn predict_dcpred(a: &mut [u8], size: usize, stride: usize, above: bool, left: bool) { - let mut sum = 0; - let mut shf = if size == 8 { 2 } else { 3 }; - - if left { - for y in 0usize..size { - sum += u32::from(a[(y + 1) * stride]); - } - - shf += 1; - } - - if above { - for x in 0usize..size { - sum += u32::from(a[x + 1]); - } - - shf += 1; - } - - let dcval = if !left && !above { - 128 - } else { - (sum + (1 << (shf - 1))) >> shf - }; - - for y in 0usize..size { - for x in 0usize..size { - a[(x + 1) + stride * (y + 1)] = dcval as u8; - } - } -} - -fn predict_tmpred(a: &mut [u8], size: usize, x0: usize, y0: usize, stride: usize) { - for y in 0usize..size { - for x in 0usize..size { - let pred = i32::from(a[(y0 + y) * stride + x0 - 1]) - + i32::from(a[(y0 - 1) * stride + x0 + x]) - - i32::from(a[(y0 - 1) * stride + x0 - 1]); - - a[(x + x0) + stride * (y + y0)] = clamp(pred, 0, 255) as u8; - } - } -} - -fn predict_bdcpred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let mut v = 4; - for i in 0usize..4 { - v += u32::from(a[(y0 + i) * stride + x0 - 1]) + u32::from(a[(y0 - 1) * stride + x0 + i]); - } - - v >>= 3; - for y in 0usize..4 { - for x in 0usize..4 { - a[x + x0 + stride * (y + y0)] = v as u8; - } - } -} - -fn topleft_pixel(a: &[u8], x0: usize, y0: usize, stride: usize) -> u8 { - a[(y0 - 1) * stride + x0 - 1] -} - -fn top_pixels(a: &[u8], x0: usize, y0: usize, stride: usize) -> (u8, u8, u8, u8, u8, u8, u8, u8) { - let pos = (y0 - 1) * stride + x0; - let a_slice = &a[pos..pos + 8]; - let a0 = a_slice[0]; - let a1 = a_slice[1]; - let a2 = a_slice[2]; - let a3 = a_slice[3]; - let a4 = a_slice[4]; - let a5 = a_slice[5]; - let a6 = a_slice[6]; - let a7 = a_slice[7]; - - (a0, a1, a2, a3, a4, a5, a6, a7) -} - -fn left_pixels(a: &[u8], x0: usize, y0: usize, stride: usize) -> (u8, u8, u8, u8) { - let l0 = a[y0 * stride + x0 - 1]; - let l1 = a[(y0 + 1) * stride + x0 - 1]; - let l2 = a[(y0 + 2) * stride + x0 - 1]; - let l3 = a[(y0 + 3) * stride + x0 - 1]; - - (l0, l1, l2, l3) -} - -fn edge_pixels( - a: &[u8], - x0: usize, - y0: usize, - stride: usize, -) -> (u8, u8, u8, u8, u8, u8, u8, u8, u8) { - let pos = (y0 - 1) * stride + x0 - 1; - let a_slice = &a[pos..=pos + 4]; - let e0 = a[pos + 4 * stride]; - let e1 = a[pos + 3 * stride]; - let e2 = a[pos + 2 * stride]; - let e3 = a[pos + stride]; - let e4 = a_slice[0]; - let e5 = a_slice[1]; - let e6 = a_slice[2]; - let e7 = a_slice[3]; - let e8 = a_slice[4]; - - (e0, e1, e2, e3, e4, e5, e6, e7, e8) -} - -fn predict_bvepred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let p = topleft_pixel(a, x0, y0, stride); - let (a0, a1, a2, a3, a4, _, _, _) = top_pixels(a, x0, y0, stride); - let avg_1 = avg3(p, a0, a1); - let avg_2 = avg3(a0, a1, a2); - let avg_3 = avg3(a1, a2, a3); - let avg_4 = avg3(a2, a3, a4); - - let avg = [avg_1, avg_2, avg_3, avg_4]; - - let mut pos = y0 * stride + x0; - for _ in 0..4 { - a[pos..=pos + 3].copy_from_slice(&avg); - pos += stride; - } -} - -fn predict_bhepred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let p = topleft_pixel(a, x0, y0, stride); - let (l0, l1, l2, l3) = left_pixels(a, x0, y0, stride); - - let avgs = [ - avg3(p, l0, l1), - avg3(l0, l1, l2), - avg3(l1, l2, l3), - avg3(l2, l3, l3), - ]; - - let mut pos = y0 * stride + x0; - for &avg in avgs.iter() { - for a_p in a[pos..=pos + 3].iter_mut() { - *a_p = avg; - } - pos += stride; - } -} - -fn predict_bldpred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let (a0, a1, a2, a3, a4, a5, a6, a7) = top_pixels(a, x0, y0, stride); - - let avgs = [ - avg3(a0, a1, a2), - avg3(a1, a2, a3), - avg3(a2, a3, a4), - avg3(a3, a4, a5), - avg3(a4, a5, a6), - avg3(a5, a6, a7), - avg3(a6, a7, a7), - ]; - - let mut pos = y0 * stride + x0; - - for i in 0..4 { - a[pos..=pos + 3].copy_from_slice(&avgs[i..=i + 3]); - pos += stride; - } -} - -fn predict_brdpred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let (e0, e1, e2, e3, e4, e5, e6, e7, e8) = edge_pixels(a, x0, y0, stride); - - let avgs = [ - avg3(e0, e1, e2), - avg3(e1, e2, e3), - avg3(e2, e3, e4), - avg3(e3, e4, e5), - avg3(e4, e5, e6), - avg3(e5, e6, e7), - avg3(e6, e7, e8), - ]; - let mut pos = y0 * stride + x0; - - for i in 0..4 { - a[pos..=pos + 3].copy_from_slice(&avgs[3 - i..7 - i]); - pos += stride; - } -} - -fn predict_bvrpred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let (_, e1, e2, e3, e4, e5, e6, e7, e8) = edge_pixels(a, x0, y0, stride); - - a[(y0 + 3) * stride + x0] = avg3(e1, e2, e3); - a[(y0 + 2) * stride + x0] = avg3(e2, e3, e4); - a[(y0 + 3) * stride + x0 + 1] = avg3(e3, e4, e5); - a[(y0 + 1) * stride + x0] = avg3(e3, e4, e5); - a[(y0 + 2) * stride + x0 + 1] = avg2(e4, e5); - a[y0 * stride + x0] = avg2(e4, e5); - a[(y0 + 3) * stride + x0 + 2] = avg3(e4, e5, e6); - a[(y0 + 1) * stride + x0 + 1] = avg3(e4, e5, e6); - a[(y0 + 2) * stride + x0 + 2] = avg2(e5, e6); - a[y0 * stride + x0 + 1] = avg2(e5, e6); - a[(y0 + 3) * stride + x0 + 3] = avg3(e5, e6, e7); - a[(y0 + 1) * stride + x0 + 2] = avg3(e5, e6, e7); - a[(y0 + 2) * stride + x0 + 3] = avg2(e6, e7); - a[y0 * stride + x0 + 2] = avg2(e6, e7); - a[(y0 + 1) * stride + x0 + 3] = avg3(e6, e7, e8); - a[y0 * stride + x0 + 3] = avg2(e7, e8); -} - -fn predict_bvlpred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let (a0, a1, a2, a3, a4, a5, a6, a7) = top_pixels(a, x0, y0, stride); - - a[y0 * stride + x0] = avg2(a0, a1); - a[(y0 + 1) * stride + x0] = avg3(a0, a1, a2); - a[(y0 + 2) * stride + x0] = avg2(a1, a2); - a[y0 * stride + x0 + 1] = avg2(a1, a2); - a[(y0 + 1) * stride + x0 + 1] = avg3(a1, a2, a3); - a[(y0 + 3) * stride + x0] = avg3(a1, a2, a3); - a[(y0 + 2) * stride + x0 + 1] = avg2(a2, a3); - a[y0 * stride + x0 + 2] = avg2(a2, a3); - a[(y0 + 3) * stride + x0 + 1] = avg3(a2, a3, a4); - a[(y0 + 1) * stride + x0 + 2] = avg3(a2, a3, a4); - a[(y0 + 2) * stride + x0 + 2] = avg2(a3, a4); - a[y0 * stride + x0 + 3] = avg2(a3, a4); - a[(y0 + 3) * stride + x0 + 2] = avg3(a3, a4, a5); - a[(y0 + 1) * stride + x0 + 3] = avg3(a3, a4, a5); - a[(y0 + 2) * stride + x0 + 3] = avg3(a4, a5, a6); - a[(y0 + 3) * stride + x0 + 3] = avg3(a5, a6, a7); -} - -fn predict_bhdpred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let (e0, e1, e2, e3, e4, e5, e6, e7, _) = edge_pixels(a, x0, y0, stride); - - a[(y0 + 3) * stride + x0] = avg2(e0, e1); - a[(y0 + 3) * stride + x0 + 1] = avg3(e0, e1, e2); - a[(y0 + 2) * stride + x0] = avg2(e1, e2); - a[(y0 + 3) * stride + x0 + 2] = avg2(e1, e2); - a[(y0 + 2) * stride + x0 + 1] = avg3(e1, e2, e3); - a[(y0 + 3) * stride + x0 + 3] = avg3(e1, e2, e3); - a[(y0 + 2) * stride + x0 + 2] = avg2(e2, e3); - a[(y0 + 1) * stride + x0] = avg2(e2, e3); - a[(y0 + 2) * stride + x0 + 3] = avg3(e2, e3, e4); - a[(y0 + 1) * stride + x0 + 1] = avg3(e2, e3, e4); - a[(y0 + 1) * stride + x0 + 2] = avg2(e3, e4); - a[y0 * stride + x0] = avg2(e3, e4); - a[(y0 + 1) * stride + x0 + 3] = avg3(e3, e4, e5); - a[y0 * stride + x0 + 1] = avg3(e3, e4, e5); - a[y0 * stride + x0 + 2] = avg3(e4, e5, e6); - a[y0 * stride + x0 + 3] = avg3(e5, e6, e7); -} - -fn predict_bhupred(a: &mut [u8], x0: usize, y0: usize, stride: usize) { - let (l0, l1, l2, l3) = left_pixels(a, x0, y0, stride); - - a[y0 * stride + x0] = avg2(l0, l1); - a[y0 * stride + x0 + 1] = avg3(l0, l1, l2); - a[y0 * stride + x0 + 2] = avg2(l1, l2); - a[(y0 + 1) * stride + x0] = avg2(l1, l2); - a[y0 * stride + x0 + 3] = avg3(l1, l2, l3); - a[(y0 + 1) * stride + x0 + 1] = avg3(l1, l2, l3); - a[(y0 + 1) * stride + x0 + 2] = avg2(l2, l3); - a[(y0 + 2) * stride + x0] = avg2(l2, l3); - a[(y0 + 1) * stride + x0 + 3] = avg3(l2, l3, l3); - a[(y0 + 2) * stride + x0 + 1] = avg3(l2, l3, l3); - a[(y0 + 2) * stride + x0 + 2] = l3; - a[(y0 + 2) * stride + x0 + 3] = l3; - a[(y0 + 3) * stride + x0] = l3; - a[(y0 + 3) * stride + x0 + 1] = l3; - a[(y0 + 3) * stride + x0 + 2] = l3; - a[(y0 + 3) * stride + x0 + 3] = l3; -} - -#[cfg(test)] -mod test { - - #[cfg(feature = "benchmarks")] - extern crate test; - use super::{ - add_residue, avg2, avg3, edge_pixels, predict_bhepred, predict_bldpred, predict_brdpred, - predict_bvepred, top_pixels, - }; - #[cfg(feature = "benchmarks")] - use super::{predict_4x4, IntraMode}; - #[cfg(feature = "benchmarks")] - use test::{black_box, Bencher}; - - #[cfg(feature = "benchmarks")] - const W: usize = 256; - #[cfg(feature = "benchmarks")] - const H: usize = 256; - - #[cfg(feature = "benchmarks")] - fn make_sample_image() -> Vec<u8> { - let mut v = Vec::with_capacity((W * H * 4) as usize); - for c in 0u8..=255 { - for k in 0u8..=255 { - v.push(c); - v.push(0); - v.push(0); - v.push(k); - } - } - v - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_predict_4x4(b: &mut Bencher) { - let mut v = black_box(make_sample_image()); - - let res_data = vec![1i32; W * H * 4]; - let modes = [ - IntraMode::TM, - IntraMode::VE, - IntraMode::HE, - IntraMode::DC, - IntraMode::LD, - IntraMode::RD, - IntraMode::VR, - IntraMode::VL, - IntraMode::HD, - IntraMode::HU, - IntraMode::TM, - IntraMode::VE, - IntraMode::HE, - IntraMode::DC, - IntraMode::LD, - IntraMode::RD, - ]; - - b.iter(|| { - black_box(predict_4x4(&mut v, W * 2, &modes, &res_data)); - }); - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_predict_bvepred(b: &mut Bencher) { - let mut v = make_sample_image(); - - b.iter(|| { - predict_bvepred(black_box(&mut v), 5, 5, W * 2); - }); - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_predict_bldpred(b: &mut Bencher) { - let mut v = black_box(make_sample_image()); - - b.iter(|| { - black_box(predict_bldpred(black_box(&mut v), 5, 5, W * 2)); - }); - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_predict_brdpred(b: &mut Bencher) { - let mut v = black_box(make_sample_image()); - - b.iter(|| { - black_box(predict_brdpred(black_box(&mut v), 5, 5, W * 2)); - }); - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_predict_bhepred(b: &mut Bencher) { - let mut v = black_box(make_sample_image()); - - b.iter(|| { - black_box(predict_bhepred(black_box(&mut v), 5, 5, W * 2)); - }); - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_top_pixels(b: &mut Bencher) { - let v = black_box(make_sample_image()); - - b.iter(|| { - black_box(top_pixels(black_box(&v), 5, 5, W * 2)); - }); - } - - #[cfg(feature = "benchmarks")] - #[bench] - fn bench_edge_pixels(b: &mut Bencher) { - let v = black_box(make_sample_image()); - - b.iter(|| { - black_box(edge_pixels(black_box(&v), 5, 5, W * 2)); - }); - } - - #[test] - fn test_avg2() { - for i in 0u8..=255 { - for j in 0u8..=255 { - let ceil_avg = ((i as f32) + (j as f32)) / 2.0; - let ceil_avg = ceil_avg.ceil() as u8; - assert_eq!( - ceil_avg, - avg2(i, j), - "avg2({}, {}), expected {}, got {}.", - i, - j, - ceil_avg, - avg2(i, j) - ); - } - } - } - - #[test] - fn test_avg2_specific() { - assert_eq!( - 255, - avg2(255, 255), - "avg2(255, 255), expected 255, got {}.", - avg2(255, 255) - ); - assert_eq!(1, avg2(1, 1), "avg2(1, 1), expected 1, got {}.", avg2(1, 1)); - assert_eq!(2, avg2(2, 1), "avg2(2, 1), expected 2, got {}.", avg2(2, 1)); - } - - #[test] - fn test_avg3() { - for i in 0u8..=255 { - for j in 0u8..=255 { - for k in 0u8..=255 { - let floor_avg = ((i as f32) + 2.0 * (j as f32) + { k as f32 } + 2.0) / 4.0; - let floor_avg = floor_avg.floor() as u8; - assert_eq!( - floor_avg, - avg3(i, j, k), - "avg3({}, {}, {}), expected {}, got {}.", - i, - j, - k, - floor_avg, - avg3(i, j, k) - ); - } - } - } - } - - #[test] - fn test_edge_pixels() { - #[rustfmt::skip] - let im = vec![5, 6, 7, 8, 9, - 4, 0, 0, 0, 0, - 3, 0, 0, 0, 0, - 2, 0, 0, 0, 0, - 1, 0, 0, 0, 0]; - let (e0, e1, e2, e3, e4, e5, e6, e7, e8) = edge_pixels(&im, 1, 1, 5); - assert_eq!(e0, 1); - assert_eq!(e1, 2); - assert_eq!(e2, 3); - assert_eq!(e3, 4); - assert_eq!(e4, 5); - assert_eq!(e5, 6); - assert_eq!(e6, 7); - assert_eq!(e7, 8); - assert_eq!(e8, 9); - } - - #[test] - fn test_top_pixels() { - #[rustfmt::skip] - let im = vec![1, 2, 3, 4, 5, 6, 7, 8, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0]; - let (e0, e1, e2, e3, e4, e5, e6, e7) = top_pixels(&im, 0, 1, 8); - assert_eq!(e0, 1); - assert_eq!(e1, 2); - assert_eq!(e2, 3); - assert_eq!(e3, 4); - assert_eq!(e4, 5); - assert_eq!(e5, 6); - assert_eq!(e6, 7); - assert_eq!(e7, 8); - } - - #[test] - fn test_add_residue() { - let mut pblock = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]; - let rblock = [ - -1, -2, -3, -4, 250, 249, 248, 250, -10, -18, -192, -17, -3, 15, 18, 9, - ]; - let expected: [u8; 16] = [0, 0, 0, 0, 255, 255, 255, 255, 0, 0, 0, 0, 10, 29, 33, 25]; - - add_residue(&mut pblock, &rblock, 0, 0, 4); - - for (&e, &i) in expected.iter().zip(&pblock) { - assert_eq!(e, i); - } - } - - #[test] - fn test_predict_bhepred() { - #[rustfmt::skip] - let expected: Vec<u8> = vec![5, 0, 0, 0, 0, - 4, 4, 4, 4, 4, - 3, 3, 3, 3, 3, - 2, 2, 2, 2, 2, - 1, 1, 1, 1, 1]; - - #[rustfmt::skip] - let mut im = vec![5, 0, 0, 0, 0, - 4, 0, 0, 0, 0, - 3, 0, 0, 0, 0, - 2, 0, 0, 0, 0, - 1, 0, 0, 0, 0]; - predict_bhepred(&mut im, 1, 1, 5); - for (&e, i) in expected.iter().zip(im) { - assert_eq!(e, i); - } - } - - #[test] - fn test_predict_brdpred() { - #[rustfmt::skip] - let expected: Vec<u8> = vec![5, 6, 7, 8, 9, - 4, 5, 6, 7, 8, - 3, 4, 5, 6, 7, - 2, 3, 4, 5, 6, - 1, 2, 3, 4, 5]; - - #[rustfmt::skip] - let mut im = vec![5, 6, 7, 8, 9, - 4, 0, 0, 0, 0, - 3, 0, 0, 0, 0, - 2, 0, 0, 0, 0, - 1, 0, 0, 0, 0]; - predict_brdpred(&mut im, 1, 1, 5); - for (&e, i) in expected.iter().zip(im) { - assert_eq!(e, i); - } - } - - #[test] - fn test_predict_bldpred() { - #[rustfmt::skip] - let mut im: Vec<u8> = vec![1, 2, 3, 4, 5, 6, 7, 8, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0]; - let avg_1 = 2u8; - let avg_2 = 3u8; - let avg_3 = 4u8; - let avg_4 = 5u8; - let avg_5 = 6u8; - let avg_6 = 7u8; - let avg_7 = 8u8; - - predict_bldpred(&mut im, 0, 1, 8); - - assert_eq!(im[8], avg_1); - assert_eq!(im[9], avg_2); - assert_eq!(im[10], avg_3); - assert_eq!(im[11], avg_4); - assert_eq!(im[16], avg_2); - assert_eq!(im[17], avg_3); - assert_eq!(im[18], avg_4); - assert_eq!(im[19], avg_5); - assert_eq!(im[24], avg_3); - assert_eq!(im[25], avg_4); - assert_eq!(im[26], avg_5); - assert_eq!(im[27], avg_6); - assert_eq!(im[32], avg_4); - assert_eq!(im[33], avg_5); - assert_eq!(im[34], avg_6); - assert_eq!(im[35], avg_7); - } - - #[test] - fn test_predict_bvepred() { - #[rustfmt::skip] - let mut im: Vec<u8> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, - 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0]; - let avg_1 = 2u8; - let avg_2 = 3u8; - let avg_3 = 4u8; - let avg_4 = 5u8; - - predict_bvepred(&mut im, 1, 1, 9); - - assert_eq!(im[10], avg_1); - assert_eq!(im[11], avg_2); - assert_eq!(im[12], avg_3); - assert_eq!(im[13], avg_4); - assert_eq!(im[19], avg_1); - assert_eq!(im[20], avg_2); - assert_eq!(im[21], avg_3); - assert_eq!(im[22], avg_4); - assert_eq!(im[28], avg_1); - assert_eq!(im[29], avg_2); - assert_eq!(im[30], avg_3); - assert_eq!(im[31], avg_4); - assert_eq!(im[37], avg_1); - assert_eq!(im[38], avg_2); - assert_eq!(im[39], avg_3); - assert_eq!(im[40], avg_4); - } -} |