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-rw-r--r--vendor/image/src/codecs/tga/decoder.rs502
-rw-r--r--vendor/image/src/codecs/tga/encoder.rs215
-rw-r--r--vendor/image/src/codecs/tga/header.rs150
-rw-r--r--vendor/image/src/codecs/tga/mod.rs17
4 files changed, 0 insertions, 884 deletions
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;
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