orion-ecs / keen-eye / 20873850013

65%

Build Type

push

github

Committed by tyevco

Commit Message

feat(assets): Add GPU-compressed texture support (DDS/BC formats) (#887)

Add support for loading GPU-compressed DDS textures using the Pfim library.
Compressed textures remain in their native format on the GPU, providing
4-8x memory savings and improved cache utilization.

**Core Changes:**
- Add `CompressedTextureFormat` enum (BC1-BC7)
- Add `CompressedTexImage2D` to IGraphicsDevice interface
- Add `CreateCompressedTexture` to IGraphicsContext interface
- Implement compressed texture upload in OpenGLDevice
- Add DdsTextureLoader for loading DDS files

**Supported Formats:**
- BC1/DXT1: RGB with optional 1-bit alpha (4 bpp)
- BC2/DXT3: RGBA with explicit 4-bit alpha (8 bpp)
- BC3/DXT5: RGBA with interpolated alpha (8 bpp)
- BC4: Single red channel (4 bpp)
- BC5: Two channels (8 bpp)
- BC6H: HDR format (8 bpp)
- BC7: High-quality RGBA (8 bpp)

The DDS loader handles both compressed formats (passed through to GPU)
and uncompressed formats (converted to RGBA). Mipmap chains are fully
supported.

Closes #887

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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