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Implemented: r9629. Implemented code for DXT1, DXT3, DXT5, RGTC decompression. r9630. DDS loading code extracted from CheckPrecompressedImage and UploadPrecompressedImage to R_LoadCompressedImage. Also implemented imageCompressedData_s::ComputeUncompressedData method for DDS decompression. r9631. Supported loading DDS images in image programs. r9632. A bit more information in trace zones: image dimensions, compressed format. In case we decide that this feature should not exist, comment out the code in rev 9631. I only implemented generic C++ code for decompression, but it works very fast. Performance test shows about 2.5 ms per megapixel for each format --- that's the same as vectorized RGTC compressor takes. There are tests for texture decompression, one for correctness, and one for performance (not run by default). I compare our decompression results to decompression results of OpenGL driver. Unfortunately, there is no bitwise exact description of DXT formats in OpenGL specs. I tried to reproduce NVIDIA's behavior as closely as I could, but not perfectly: I allow error up to 1 in each component in the tests. |
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Some bugfixes: r9633. Hopefully fixed GCC compile error. r9635. Fixed bug with sizes. |
- Anonymous
