imagequant-sys (cargo): Convert 24/32-bit images to 8-bit palette with alpha channel. C API/FFI libimagequant that powers pngquant lossy PNG compressor.  Dual-licensed like pngquant. See https://pngquant.org for details.
Keywords: quantization|palette|image|quant|dither|callback|conversion|image-optimization|image-pixels|minification|palette-generation|pixel-array|pngquant|quality|rgba-pixels|visual-studio