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image 0.21.3

Imaging library written in Rust. Provides basic filters and decoders for the most common image formats.
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# Rust Image Release Notes

Rust image aims to be a pure-Rust implementation of various popular image formats. Accompanying reading/write support, rust image provides basic imaging processing function. See `README.md` for further details.

## Known issues
 - Interlaced (progressive) or animated images are not well supported.
 - Images with *n* bit/channel (*n ≠ 8*) are not well supported.

## Changes

### Version 0.21.3

- Fixed an issue in `HdrDecoder::read_image_transform` that could drop
  uninitialized instances of arbitrary types on panic or expose uninitialized
  memory. The fix entails not dropping any value on error or panic, the method
  should only be used to read to types without `Drop` implementations.

### Version 0.21.2

- Fixed a variety of crashes and opaque errors in webp
- Updated the png limits to be less restrictive
- Reworked even more `unsafe` operations into safe alternatives
- Derived Debug on FilterType and Deref on Pixel
- Removed a restriction on DXT to always require power of two dimensions
- Change the encoding of RGBA in bmp using bitfields
- Corrected various urls

### Version 0.21.1

- A fairly important bugfix backport
- Fixed a potentially memory safety issue in the hdr and tiff decoders, see #885
- See [the full advisory](docs/2019-04-23-memory-unsafety.md) for an analysis
- Fixes `ImageBuffer` index calculation for very, very large images
- Fix some crashes while parsing specific incomplete pnm images
- Added comprehensive fuzzing for the pam image types

### Version 0.21

- Updated README to use `GenericImageView`
- Removed outdated version number from CHANGES
- Compiles now with wasm-unknown-emscripten target
- Restructured `ImageDecoder` trait
- Updated README with a more colorful example for the Julia fractal
- Use Rust 1.24.1 as minimum supported version
- Support for loading GIF frames one at a time with `animation::Frames`
- The TGA decoder now recognizes 32 bpp as RGBA(8)
- Fixed `to_bgra` document comment
- Added release test script
- Removed unsafe code blocks several places
- Fixed overlay overflow bug issues with documented proofs

### Version 0.20

- Clippy lint pass
- Updated num-rational dependency
- Added BGRA and BGR color types
- Improved performance of image resizing
- Improved PBM decoding
- PNM P4 decoding now returns bits instead of bytes
- Fixed move of overlapping buffers in BMP decoder
- Fixed some document comments
- `GenericImage` and `GenericImageView` is now object-safe
- Moved TIFF code to its own library
- Fixed README examples
- Fixed ordering of interpolated parameters in TIFF decode error string
- Thumbnail now handles upscaling
- GIF encoding for multiple frames
- Improved subimages API
- Cargo fmt fixes

### Version 0.19

- Fixed panic when blending with alpha zero.
- Made `save` consistent.
- Consistent size calculation.
- Fixed bug in `apply_with_alpha`.
- Implemented `TGADecoder::read_scanline`.
- Use deprecated attribute for `pixels_mut`.
- Fixed bug in JPEG grayscale encoding.
- Fixed multi image TIFF.
- PNM encoder.
- Added `#[derive(Hash)]` for `ColorType`.
- Use `num-derive` for `#[derive(FromPrimitive)]`.
- Added `into_frames` implementation for GIF.
- Made rayon an optional dependency.
- Fixed issue where resizing image did not give exact width/height.
- Improved downscale.
- Added a way to expose options when saving files.
- Fixed some compiler warnings.
- Switched to lzw crate instead of using built-in version.
- Added `ExactSizeIterator` implementations to buffer structs.
- Added `resize_to_fill` method.
- DXT encoding support.
- Applied clippy suggestions.

### Version 0.4
 - Various improvements.
 - Additional supported image formats (BMP and ICO).
 - GIF and PNG codec moved into separate crates.

### Version 0.3
 - Replace `std::old_io` with `std::io`.

### Version 0.2
 - Support for interlaced PNG images.
 - Writing support for GIF images (full color and paletted).
 - Color quantizer that converts 32bit images to paletted including the alpha channel.
 - Initial support for reading TGA images.
 - Reading support for TIFF images (packbits and FAX compression not supported).
 - Various bug fixes and improvements.

### Version 0.1
- Initial release
- Basic reading support for png, jpeg, gif, ppm and webp.
- Basic writing support for png and jpeg.
- A collection of basic imaging processing function like `blur` or `invert`