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authorIan Romanick <ian.d.romanick@intel.com>2014-01-14 13:41:19 -0800
committerCarl Worth <cworth@cworth.org>2014-01-25 16:39:13 -0800
commit0fd4cf4bf811f60363574e4baf9b992189003375 (patch)
tree57f651357ca6590575e7f672ea0e95710c200bee /src/gallium
parent45f0736aa56ecd6dc558ff73779c6f6bb8582c90 (diff)
mesa: Add COMPRESSED_RGBA_S3TC_DXT1_EXT to COMPRESSED_TEXTURE_FORMATS for GLES
The ES and desktop GL specs diverge here. Yay! In desktop OpenGL, the driver can perform online compression of uncompressed texture data. GL_NUM_COMPRESSED_TEXTURE_FORMATS and GL_COMPRESSED_TEXTURE_FORMATS give the application a list of formats that it could ask the driver to compress with some expectation of quality. The GL_ARB_texture_compression spec calls this "suitable for general-purpose usage." As noted above, this means GL_COMPRESSED_RGBA_S3TC_DXT1_EXT is not included in the list. In OpenGL ES, the driver never performs compression. GL_NUM_COMPRESSED_TEXTURE_FORMATS and GL_COMPRESSED_TEXTURE_FORMATS give the application a list of formats that the driver can receive from the application. It is the *complete* list of formats. The GL_EXT_texture_compression_s3tc spec says: "New State for OpenGL ES 2.0.25 and 3.0.2 Specifications The queries for NUM_COMPRESSED_TEXTURE_FORMATS and COMPRESSED_TEXTURE_FORMATS include COMPRESSED_RGB_S3TC_DXT1_EXT, COMPRESSED_RGBA_S3TC_DXT1_EXT, COMPRESSED_RGBA_S3TC_DXT3_EXT, and COMPRESSED_RGBA_S3TC_DXT5_EXT." Note that the addition is only to the OpenGL ES specification! Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> See-also: http://lists.freedesktop.org/archives/mesa-dev/2013-October/047439.html Reviewed-by: Marek Olšák <marek.olsak@amd.com> Reviewed-by: Brian Paul <brianp@vmware.com> Cc: "10.0" <mesa-stable@lists.freedesktop.org> (cherry picked from commit 0a75909b3f554b20c9672fc72efbc4f6ec3ce4ea)
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