Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 353 insertions, 0 deletions

diff --git a/vendor/image/src/codecs/tiff.rs b/vendor/image/src/codecs/tiff.rs
new file mode 100644
index 0000000..7c33412
--- /dev/null
+++ b/vendor/image/src/codecs/tiff.rs
@@ -0,0 +1,353 @@
+//! 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)
+    }
+}