# Rust Image 0.4 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 0.19
- 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`