oxipng/CHANGELOG.md

Version 0.18.4

• Bump dependencies, reduces binary size by a considerable amount
• Hide all modules from documentation, and only export the specific structures that should be public. Previously there were too many implementation details made public. The modules are still public for the purposes of our integration tests, but we strongly advice against using undocumented modules. These may become private in the future.

Version 0.18.3

• Return exit code of 1 if an error occurred while processing a file using the CLI app (#93)

Version 0.18.2

• Bump image to 0.18
• Fix unfiltering of scan lines in interlaced images (#92)

Version 0.18.1

• Bump rayon to 0.9
• Fix failure to optimize on certain grayscale images (#89)

Version 0.18.0

• Bump itertools to 0.7
• Bump image to 0.17
• [SEMVER_MAJOR] Bump minimum rustc version to 1.20.0
• Fix parsing of glob paths on Windows (#90)

Version 0.17.2

• Bump image to 0.16
• Quickly pass over files that do not have a PNG header (#85 @emielbeinema)
• Return an error instead of crashing on APNG files (#83 @emielbeinema)

Version 0.17.1

• Remove VC++ download requirement for Windows users

Version 0.17.0

• [SEMVER_MAJOR] Bump minimum required rustc version to 1.19.0
• [SEMVER_MINOR] Oxipng will now, by default, attempt to change all transparent pixels to rgba(0, 0, 0, 0) to improve compression. It does fast trials with filters 0 and 5 to see if this is an improvement over the existing alpha channel.
• [SEMVER_MINOR] Add a -a option to the command line (alphas in the struct) which enables 6 different trials for optimizing the alpha channel, using the previously mentioned fast heuristic. This option will make optimization of images with transparency somewhat slower, but may improve compression.
• Fixed a bug in reducing palettes for images with bit depth of two (#80)
• Fixed another bug in reducing palettes for images with bit depth less than eight (#82)
• Code cleanup
• Bump image to 0.15

Version 0.16.3

• Fix command-line help text (#70)

Version 0.16.2

• Publicly export error module

Version 0.16.1

• Fix rayon's breaking changes that they made in a point release

Version 0.16.0

• [SEMVER_MAJOR] Bump minimum rustc version to 1.17.0
• Bump image to 0.14
• Bump rayon to 0.8

Version 0.15.2

• Bump image to 0.13 (#65)
• Bump rayon to 0.7
• Bump itertools to 0.6

Version 0.15.1

• Ignore color reductions that would increase file size (#61)

Version 0.15.0

• [SEMVER_MINOR] Check images for correctness before writing result (#60)
• Fix invalid output when reducing image to a different color type but file size does not improve (#60)
• Don't write new file if moving from interlaced to non-interlaced if new file would be larger

Version 0.14.4

• Fix bug when reducing RGBA to Indexed if image has 256 colors plus a background color

Version 0.14.3

• Fix multiple bugs when reducing transparency palettes

Version 0.14.2

• Fix a bug when reducing palette in images with bit depth less than 8
• Fix a bug when reducing palette in images with transparency

Version 0.14.1

• Remove zlib dependency and switch entirely to miniz, since zlib 1.2.11 was not working with oxipng. This costs some performance, but is better than having a broken application.

Version 0.14.0

• Performance optimizations
• [SEMVER_MAJOR] Bump minimum rustc version to 1.13.0
• Add categories on crates.io

Version 0.13.1

• Bump regex dependency to 0.2
• Bump byteorder dependency to 1.0
• Bump rayon dependency to 0.6

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
• [SMEVER_MAJOR] Bump minimum required rustc version to 1.12.0

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