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authorBrian Paul <[email protected]>2014-04-17 08:54:47 -0700
committerBrian Paul <[email protected]>2014-04-17 11:29:33 -0700
commit615a356ee38d882e9f073dba0b8918a903094124 (patch)
treeb1950dc8b9eb0c612161ff371ef280dc083cd119 /src/gallium/drivers/svga/SConscript
parent52faafa17424a3842f150019a9d76ce626019d9f (diff)
svga: implement support for signed byte vertex attributes
There's no SVGA3D_DECLTYPE that directly corresponds to PIPE_FORMAT_R8G8B8_SNORM. Previously, we used the swtnl fallback path to handle this but that's slow and causes invariance issues. Now we fetch the attribute as SVGA3D_DECLTYPE_UBYTE4N and insert some extra VS instructions to remap the attributes from the range [0,1] to the range[-1,1]. Fixes Sauerbraten sw fallback. Fixes piglit normal3b3s-invariance test. Reviewed-by: Charmaine Lee <[email protected]>
Diffstat (limited to 'src/gallium/drivers/svga/SConscript')
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