oxipng/CHANGELOG.md

Version 0.13.0

• Fix bug in certain PNG headers when reducing color type (#52)
• [SEMVER_MAJOR] Reduction functions now take &mut PngData and return a bool indicating whether the image was reduced
• Bump minimum required rust version to 1.11.0

Version 0.12.0

• Performance optimizations
• Fix processing filenames that contain commas (@aliceatlas #50)
• [SEMVER_MINOR] Add zopfli option (-Z), disabled by default. Gives about 10% better compression, but is currently 50-100x slower.

Version 0.11.0

• [SEMVER_MAJOR] Bump minimum rustc version to 1.9.0, required by dependencies
• [SEMVER_MINOR] Allow calling optimization presets via crate using Options::from_preset
• [SEMVER_MAJOR] Return proper PngError type which implements std::error::Error from Results
• [SEMVER_MAJOR] Rename module deflate::deflate to deflate
• Performance optimizations

Version 0.10.0

• [SEMVER_MINOR] Make clap and regex dependencies optional
  • Enabled by default, needed for executable build; can be disabled for use in crates
• Remove reduction from palette to grayscale, which was not working and provided minimal benefit

Version 0.9.0

• [SEMVER_MAJOR] Significant refactoring of modules
• Use itertools to cleanup areas of code
• Use multiple threads for filtering trials

Version 0.8.2

• Fix issue where images smaller than 4px width would crash on interlacing (#42)

Version 0.8.1

• Minor optimizations
• Fix issue where interlaced images with certain widths would fail to optimize

Version 0.8.0

• [SEMVER_MINOR] Add support for optimizing PNGs already loaded into memory via library function

Version 0.7.0

• Minor compression improvement on interlaced images
• Performance optimizations
• [SEMVER_MINOR] Move default Options into a Default impl
• [SEMVER_MINOR] Add option for setting number of threads (#39)

Version 0.6.0

• Fix issue where output directory would not be created if it did not exist
• Use miniz for compression strategies where it outperforms zlib
• [SEMVER_MINOR] Partially implement -p / --preserve, as far as stable Rust will allow for now
• [SEMVER_MINOR] Implement --fix to ignore CRC errors and recalculate correct CRC in output

Version 0.5.0

• [SEMVER_MINOR] Palette entries can now reduced, on by default (#11)
• Don't report that we are in pretend mode if verbosity is set to none
• Add cargo bench suite (#7)

Version 0.4.0

• Performance optimizations
• [SEMVER_MAJOR] -s automatically infers --strip safe (#31)
• Update byteorder and clap crates
• Fix issue where interlaced images incorrectly applied filters on the first line of a pass

Version 0.3.0

• Properly decode interlaced images
• [SEMVER_MINOR] Allow converting between progressive and interlaced images (#3)
• Fix a bug that would cause oxipng to crash on very small images

Version 0.2.2

• Limit number of threads to 1.5x number of cores
• Significantly improve memory usage, especially with high optimization levels. (#32)
• Refactor output code (#19)

Version 0.2.1

• Add rustdoc for public methods and structs
• Improve filter mode 5 heuristic (#16)
• Add tests for edge-case images with subtitles (#29)

Version 0.2.0

• Fix program version that is displayed when running oxipng -V
• Ensure --quiet mode is actually quiet (@SethDusek #20)
• Write status/debug information to stderr instead of stdout
• Use heuristics to determine best combination for -o1 (#21)
• [SEMVER_MAJOR] Allow 'safe', 'all', or comma-separated list as options for --strip
• [SEMVER_MINOR] Add -s alias for --strip

Version 0.1.1

• Fix oxipng * writing all input files to one output file (#15)

Version 0.1.0

• Initial beta release
• Reduce color type and bit depth
• Recompress with zlib
• Multithreading
• Strip headers option
• Backup file before writing option
• Write to stdout option