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ARB_texture_compression Extension
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Radeon SDK
3Dprogramming
Sample
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ARB_texture_compression
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This extension provides a set of generic compressed internal formats that allow applications to specify that texture images should be stored in compressed form. It also provides a framework which allows additional extensions, such as EXT_texture_compression_s3tc, to provide specific compressed image formats. Generic formats are compressed by the driver using any internal compressed format it chooses.
The EXT_texture_compression_s3tc extension provides support for four specific compressed formats: RGB_DXT1_S3TC (the same as GL_S3TC_RGB in S3_s3tc), RGBA_DXT1_S3TC, RGBA_DXT3_S3TC and RGBA_DXT5_S3TC.
The S3_s3tc extension is still supported by the Radeon® driver, although it provides identical compression to the RGB_DXT1_S3TC format using the ARB_texture_compression and EXT_texture_compression_s3tc extensions.
For full details, see the ARB_texture_compression spec.
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