From a148cc51fbe56266199057cfde2abb2b59eb8713 Mon Sep 17 00:00:00 2001
From: Brian <brian.paul@tungstengraphics.com>
Date: Fri, 25 Jan 2008 08:15:04 -0700
Subject: gallium: optimizations to flatshade, two-side prim stages

---
 src/mesa/pipe/draw/draw_flatshade.c | 26 +++++++++++++++++++-------
 src/mesa/pipe/draw/draw_twoside.c   | 31 ++++++++++++++++---------------
 2 files changed, 35 insertions(+), 22 deletions(-)

(limited to 'src')

diff --git a/src/mesa/pipe/draw/draw_flatshade.c b/src/mesa/pipe/draw/draw_flatshade.c
index 46b0f7970f..8444c53310 100644
--- a/src/mesa/pipe/draw/draw_flatshade.c
+++ b/src/mesa/pipe/draw/draw_flatshade.c
@@ -70,18 +70,31 @@ static void flatshade_begin( struct draw_stage *stage )
 
 
 /** Copy all the color attributes from 'src' vertex to 'dst' vertex */
-static INLINE void copy_colors( struct draw_stage *stage, 
-                                struct vertex_header *dst, 
+static INLINE void copy_colors( struct draw_stage *stage,
+                                struct vertex_header *dst,
                                 const struct vertex_header *src )
 {
    const struct flat_stage *flat = flat_stage(stage);
    uint i;
+   for (i = 0; i < flat->num_color_attribs; i++) {
+      const uint attr = flat->color_attribs[i];
+      COPY_4FV(dst->data[attr], src->data[attr]);
+   }
+}
 
-   /* Look for constant/flat attribs and duplicate from src to dst vertex */
-   /* skip attrib[0] which is vert pos */
+
+/** Copy all the color attributes from src vertex to dst0 & dst1 vertices */
+static INLINE void copy_colors2( struct draw_stage *stage,
+                                 struct vertex_header *dst0,
+                                 struct vertex_header *dst1,
+                                 const struct vertex_header *src )
+{
+   const struct flat_stage *flat = flat_stage(stage);
+   uint i;
    for (i = 0; i < flat->num_color_attribs; i++) {
       const uint attr = flat->color_attribs[i];
-      memcpy(dst->data[attr], src->data[attr], sizeof(src->data[0]));
+      COPY_4FV(dst0->data[attr], src->data[attr]);
+      COPY_4FV(dst1->data[attr], src->data[attr]);
    }
 }
 
@@ -101,8 +114,7 @@ static void flatshade_tri( struct draw_stage *stage,
    tmp.v[1] = dup_vert(stage, header->v[1], 1);
    tmp.v[2] = header->v[2];
 
-   copy_colors(stage, tmp.v[0], tmp.v[2]);
-   copy_colors(stage, tmp.v[1], tmp.v[2]);
+   copy_colors2(stage, tmp.v[0], tmp.v[1], tmp.v[2]);
    
    stage->next->tri( stage->next, &tmp );
 }
diff --git a/src/mesa/pipe/draw/draw_twoside.c b/src/mesa/pipe/draw/draw_twoside.c
index da8e7bd90d..75c51ec6a9 100644
--- a/src/mesa/pipe/draw/draw_twoside.c
+++ b/src/mesa/pipe/draw/draw_twoside.c
@@ -75,6 +75,12 @@ static void twoside_begin( struct draw_stage *stage )
       }
    }
 
+   if (!twoside->attrib_back0)
+      twoside->attrib_front0 = 0;
+
+   if (!twoside->attrib_back1)
+      twoside->attrib_front1 = 0;
+
    /*
     * We'll multiply the primitive's determinant by this sign to determine
     * if the triangle is back-facing (negative).
@@ -86,28 +92,23 @@ static void twoside_begin( struct draw_stage *stage )
 }
 
 
-static INLINE void copy_attrib( unsigned attr_dst,
-			       unsigned attr_src,
-			       struct vertex_header *v )
-{
-   COPY_4FV(v->data[attr_dst], v->data[attr_src]);
-}
-
-
 /**
  * Copy back color(s) to front color(s).
  */
-static struct vertex_header *copy_bfc( struct twoside_stage *twoside, 
-				       const struct vertex_header *v,
-				       unsigned idx )
+static INLINE struct vertex_header *
+copy_bfc( struct twoside_stage *twoside, 
+          const struct vertex_header *v,
+          unsigned idx )
 {   
    struct vertex_header *tmp = dup_vert( &twoside->stage, v, idx );
    
-   if (twoside->attrib_front0 && twoside->attrib_back0) {
-      copy_attrib(twoside->attrib_front0, twoside->attrib_back0, tmp);
+   if (twoside->attrib_back0) {
+      COPY_4FV(tmp->data[twoside->attrib_front0],
+               tmp->data[twoside->attrib_back0]);
    }
-   if (twoside->attrib_front1 && twoside->attrib_back1) {
-      copy_attrib(twoside->attrib_front1, twoside->attrib_back1, tmp);
+   if (twoside->attrib_back1) {
+      COPY_4FV(tmp->data[twoside->attrib_front1],
+               tmp->data[twoside->attrib_back1]);
    }
 
    return tmp;
-- 
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