This release of etcpak brings the following changes:
- The build system has been changed to Meson.
- PNG images compression and decompression is now using zlib-ng, which significantly reduces the image load times.
- BC4, BC5, ETC2_R and ETC2_RG compression modes are now available. The compression algorithms in use were previously used to compress alpha channels in BC3 and ETC2_RGBA modes.
- The command line options have been revamped to make more sense.
- BC7 compression mode has been added. The base algorithm is Rich Geldreich's 4-mode bc7enc, which has been SIMD-ified (AVX2 and AVX512) for a ~2.6x speed increase. The results are bit-exact with the original implementation.
- Removed option to save alpha channel as a separate file.
- It is now possible to load and save DDS files.