public final class EXTTextureCompressionRGTC extends java.lang.ObjectNative bindings to the EXT_texture_compression_rgtc extension.
This extension introduces four new block-based texture compression formats suited for unsigned and signed red and red-green textures (hence the name "rgtc" for Red-Green Texture Compression).
These formats are designed to reduce the storage requirements and memory bandwidth required for red and red-green textures by a factor of 2-to-1 over conventional uncompressed luminance and luminance-alpha textures with 8-bit components (
The compressed signed red-green format is reasonably suited for storing compressed normal maps.
This extension uses the same compression format as the EXT_texture_compression_latc extension except the color data is stored in the red and green components rather than luminance and alpha. Representing compressed red and green components is consistent with the BC4 and BC5 compressed formats supported by DirectX 10.
Fields Modifier and Type Field Description
GL_COMPRESSED_SIGNED_RED_RGTC1_EXTAccepted by the
internalformatparameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the
formatparameter of CompressedTexSubImage2D.