xray-16
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OpenXRay
BC7 compression for dds
R4 now uses DirectXTex to load textures. That means, it supports BC7 now.
Update: I just successfully tested BC7 support and it is confirmed.
I'll use this issue as a general task for all BC1-7 formats.
Task list:
- [x] DirectX 11
- [x] Use DirectXTex to load textures. (supports all BC formats)
- [x] ~~DirectX 9~~ has been deprecated (#468)
- [x] ~~BC4/BC5 is also known as ATI1/ATI2. Check if ATI formats are supported and load as-is, or convert to DXT.~~
- [x] ~~Convert BC6H/BC7 to DXT or ATI.~~
- [ ] OpenGL
- Check if corresponding extension is supported and convert it to other format if not.
- [ ] BC1-3 (aka DXTn)
- If this is not supported, all we can do is to just decompress the texture and load it in an uncompressed format.
- https://github.com/KhronosGroup/OpenGL-Registry/blob/main/extensions/EXT/EXT_texture_compression_s3tc.txt
- https://github.com/KhronosGroup/OpenGL-Registry/blob/main/extensions/EXT/EXT_texture_compression_dxt1.txt
- https://github.com/KhronosGroup/OpenGL-Registry/blob/main/extensions/ANGLE/ANGLE_texture_compression_dxt.txt
- [ ] BC4-5 (aka ATI1-2)
- https://github.com/KhronosGroup/OpenGL-Registry/blob/main/extensions/ARB/ARB_texture_compression_rgtc.txt
- https://github.com/KhronosGroup/OpenGL-Registry/blob/main/extensions/EXT/EXT_texture_compression_rgtc.txt
- [ ] BC6H/BC7
- https://github.com/KhronosGroup/OpenGL-Registry/blob/main/extensions/ARB/ARB_texture_compression_bptc.txt
- https://github.com/KhronosGroup/OpenGL-Registry/blob/main/extensions/EXT/EXT_texture_compression_bptc.txt
Useful links:
- https://github.com/microsoft/DirectXTex/wiki/Decompress
- https://github.com/microsoft/DirectXTex/blob/main/DirectXTex/DirectXTexDDS.cpp#L60
- https://github.com/wine-mirror/wine/blob/master/dlls/wined3d/utils.c#L1475
- https://github.com/dolphin-emu/dolphin/pull/5834/files
- https://www.khronos.org/opengl/wiki/S3_Texture_Compression