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authorPaul Berry <[email protected]>2011-09-17 09:42:02 -0700
committerPaul Berry <[email protected]>2011-09-23 13:28:51 -0700
commit1ad54ae0b1713e399c5db43d0eba87861075b4c7 (patch)
treeade022dea53ca82dffd50fde2cfdda3bdc240e68 /Android.common.mk
parentc06e32596735074536b0e613cbddb1c5fd7b367a (diff)
mesa: Add a flag to indicate whether a program uses gl_ClipDistance.
GLSL 1.30 requires us to use gl_ClipDistance for clipping if the vertex shader contains a static write to it, and otherwise use user-defined clipping planes. Since the driver needs to behave differently in these two cases, we need a flag to record whether the shader has written to gl_ClipDistance. The new flag is called UsesClipDistance. We initially store it in gl_shader_program (since that is the data structure that is available when we check to see whethe gl_ClipDistance was written to), and we later copy it to a flag with the same name in gl_vertex_program, since that is a more convenient place for the driver to access it (in i965, at least). Reviewed-by: Eric Anholt <[email protected]> Tested-by: Brian Paul <[email protected]>
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