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authorKenneth Graunke <[email protected]>2011-09-19 18:30:15 -0700
committerKenneth Graunke <[email protected]>2011-09-23 17:12:47 -0700
commit0fabf8e8dc96a0eb8a9fbbac760d4faceee3af48 (patch)
treecb54d1bbcc585848df71fd12a6c0ea2151e3dbb9 /src/glx/packsingle.h
parent604173fb1c4c7705681e77bbd862b9f953dbc6d4 (diff)
glsl: Defer initialization of built-in functions until they're needed.
Very simple shaders don't actually use GLSL built-ins. For example: - gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; - gl_FragColor = vec4(0.0); Both of the shaders used by _mesa_meta_glsl_Clear() also qualify. By waiting to initialize the built-ins until the first time we need to look for a signature, we can avoid the overhead entirely in these cases. Makes piglit run roughly 18% faster (255 vs. 312 seconds). Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]>
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