UNIFIED TEXTURE COMPRESSION FRAMEWORK

摘要

A method for compressing textures. A first block of texels is transformed from a red-green-blue (RGB) space to a second block of texels in a luminance-chrominance space. The first block has red values, green values and blue values. The second block has luminance values and chrominance values. The chrominance values may be based on a sum of the red values, a sum of the green values and a sum of the blue values. The chrominance values may be sampled for a first subset of texels in the second block. The luminance values and the sampled chrominance values may be converted to an 8-bit integer format. The luminance values of the first subset may be modified to restore a local linearity property to the first subset. The second block may be compressed into a third block.