i965: fix EXT_provoking_vertex support

This didn't work for quad/quadstrips at all, and for all other primitive types
it only worked when they were unclipped.
Fix up the former in gs stage (could probably do without these changes and
instead set QuadsFollowProvokingVertexConvention to false), and the rest in
clip stage.

1 files changed, 7 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_gs.c b/src/mesa/drivers/dri/i965/brw_gs.c
index 48c2b9a41c..610b6c35e2 100644
--- a/src/mesa/drivers/dri/i965/brw_gs.c
+++ b/src/mesa/drivers/dri/i965/brw_gs.c
@@ -85,10 +85,10 @@ static void compile_gs_prog( struct brw_context *brw,
     */
    switch (key->primitive) {
    case GL_QUADS:
-      brw_gs_quads( &c ); 
+      brw_gs_quads( &c, key );
       break;
    case GL_QUAD_STRIP:
-      brw_gs_quad_strip( &c );
+      brw_gs_quad_strip( &c, key );
       break;
    case GL_LINE_LOOP:
       brw_gs_lines( &c );
@@ -149,6 +149,7 @@ static const GLenum gs_prim[GL_POLYGON+1] = {
 static void populate_key( struct brw_context *brw,
 			  struct brw_gs_prog_key *key )
 {
+   GLcontext *ctx = &brw->intel.ctx;
    memset(key, 0, sizeof(*key));
 
    /* CACHE_NEW_VS_PROG */
@@ -158,6 +159,9 @@ static void populate_key( struct brw_context *brw,
    key->primitive = gs_prim[brw->primitive];
 
    key->hint_gs_always = 0;	/* debug code? */
+   
+   /* _NEW_LIGHT */
+   key->pv_first = (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION);
 
    key->need_gs_prog = (key->hint_gs_always ||
 			brw->primitive == GL_QUADS ||
@@ -193,7 +197,7 @@ static void prepare_gs_prog(struct brw_context *brw)
 
 const struct brw_tracked_state brw_gs_prog = {
    .dirty = {
-      .mesa  = 0,
+      .mesa  = _NEW_LIGHT,
       .brw   = BRW_NEW_PRIMITIVE,
       .cache = CACHE_NEW_VS_PROG
    },