feat: add BC7 CPU decode for legacy GPUs #74
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While ANGLE itself runs on legacy feature levels (10.0, 10.1); support for 11.0+ texture formats like BC7 is absent. To support this lower end of GPUs we introduce fallback logic to transcode BC7 into RGBA with a hardcoded option to also reduce texture resolution by one level to counteract the 4x increase in VRAM usage this entails. This adds a dependency on `cmp_core` from GPUOpen's Compressonator, built as a static library so there's no runtime deployment concerns.
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The user in PathOfBuildingCommunity/PathOfBuilding-PoE2#844 has reported back that this addressed their missing texture problems. Should be good to go. |
Wires77
approved these changes
Apr 2, 2025
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While ANGLE itself runs on legacy feature levels (10.0, 10.1); support for 11.0+ texture formats like BC7 is absent.
To support this lower end of GPUs we introduce fallback logic to transcode BC7 into RGBA with a hardcoded option to also reduce texture resolution by one level to counteract the 4x increase in VRAM usage this entails.
This adds a dependency on
cmp_corefrom GPUOpen's Compressonator, built as a static library so there's no runtime deployment concerns.