1.2.0 (2019-08-04)
This is a feature and performance release.
* Added --dither, --dither-grain and --dither-intensity options. These
allow for sub-cell dithering in quantized modes (none, 2, 16, 240
and 256). Especially beneficial when used with -p off.
* Added API for ordered and diffusion-based dithering in quantization.
* Added API support for multiple 8bpc pixel modes: RGB, BGR, RGBA, BGRA,
ARGB, ABGR with either premultiplied or unassociated alpha channels.
* Smooth scaling is now done internally, meaning libchafa consumers no
longer need to prescale images.
* Implemented a machine learning tool that can generate custom fonts
for efficient image reproduction from a provided dataset. This is
left uninstalled since it's still experimental (Mo Zhou).
* Throughput improvements:
- GIF animations now start playing instantly.
- GIF CPU overhead reduced by 75%, peak memory use down 95%-99% (!).
- XWD common case CPU overhead down 60-70%, peak memory down 70%.
- Additional halving of CPU overhead in 240- and 256-color modes.
- Streamlined pixel pipeline for better parallelization.
* Installation instructions:
- New: Guix (Guy Fleury Iteriteka).
- New: openSUSE (Michael Vetter).
* Bug fixes:
[unfiled] Certain SVGs had transparency replaced with a white
background (nemo).
[unfiled] -lm dependency belongs in libchafa, not frontend.