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i965: Set the correct provoking vertex for clipped first-mode trifans. 

Bug #24470: glean clipFlat test.
This commit is contained in:
Eric Anholt 2010-05-14 15:34:35 -07:00
parent 18ed479119
commit 4e84dc8729
1 changed files with 17 additions and 3 deletions
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20
src/mesa/drivers/dri/i965/brw_clip_tri.c
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@ -177,7 +177,7 @@ void brw_clip_tri_init_vertices( struct brw_clip_compile *c )
void brw_clip_tri_flat_shade( struct brw_clip_compile *c ) void brw_clip_tri_flat_shade( struct brw_clip_compile *c )
{ {
struct brw_compile *p = &c->func; struct brw_compile *p = &c->func;
struct brw_instruction *is_poly; struct brw_instruction *is_poly, *is_trifan;
struct brw_reg tmp0 = c->reg.loopcount; /* handy temporary */ struct brw_reg tmp0 = c->reg.loopcount; /* handy temporary */
brw_AND(p, tmp0, get_element_ud(c->reg.R0, 2), brw_imm_ud(PRIM_MASK)); brw_AND(p, tmp0, get_element_ud(c->reg.R0, 2), brw_imm_ud(PRIM_MASK));
@ -195,8 +195,22 @@ void brw_clip_tri_flat_shade( struct brw_clip_compile *c )
is_poly = brw_ELSE(p, is_poly); is_poly = brw_ELSE(p, is_poly);
{ {
if (c->key.pv_first) { if (c->key.pv_first) {
brw_clip_copy_colors(c, 1, 0); brw_CMP(p,
brw_clip_copy_colors(c, 2, 0); vec1(brw_null_reg()),
BRW_CONDITIONAL_EQ,
tmp0,
brw_imm_ud(_3DPRIM_TRIFAN));
is_trifan = brw_IF(p, BRW_EXECUTE_1);
{
brw_clip_copy_colors(c, 0, 1);
brw_clip_copy_colors(c, 2, 1);
}
is_trifan = brw_ELSE(p, is_trifan);
{
brw_clip_copy_colors(c, 1, 0);
brw_clip_copy_colors(c, 2, 0);
}
brw_ENDIF(p, is_trifan);
} }
else { else {
brw_clip_copy_colors(c, 0, 2); brw_clip_copy_colors(c, 0, 2);