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i965: Fix provoking vertex select in clip state for sandybridge

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Triangle fan provoking vertex for first convention should be
'vertex 1' in sandybridge clip state.

Partly fix glean/clipFlat case
This commit is contained in:
Zhenyu Wang 2011-01-04 13:46:13 +08:00
parent 7bd2c5d1f9
commit 9977297ad9
1 changed files with 4 additions and 1 deletions
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5
src/mesa/drivers/dri/i965/gen6_clip_state.c
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@ -43,7 +43,10 @@ upload_clip_state(struct brw_context *brw)
depth_clamp = GEN6_CLIP_Z_TEST;
if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION) {
provoking = 0;
provoking =
(0 << GEN6_CLIP_TRI_PROVOKE_SHIFT) |
(1 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) |
(0 << GEN6_CLIP_LINE_PROVOKE_SHIFT);
} else {
provoking =
(2 << GEN6_CLIP_TRI_PROVOKE_SHIFT) |