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e46ad9a91e
Luminance textures are not supported on GL3 and as the textures are accessed via a shader anyway it doesn't seem like it should make much difference which component the single-component textures are in. Cogl already has code to fake alpha textures via the texture swizzle extension on GL3. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit ca1666860a325fa4d2362cdd38297d6281e997d8)