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Brian Paul authored
Previously, we were counting gl_FrontFacing, gl_FragCoord and gl_PointCoord against the limit of varying variables. This prevented some valid shaders from linking. The other potential solution to this is to have the driver advertise more varying vars or set the GLSLSkipStrictMaxVaryingLimitCheck flag. But the above-mentioned variables aren't conventional varying attributes so it doesn't seem right to count them. Reviewed-by: Eric Anholt <eric@anholt.net>
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