From: Brian <brian.paul@tungstengraphics.com>
Date: Fri, 21 Sep 2007 18:41:24 +0000 (-0600)
Subject: test for presence of both front and back color vertex slots
X-Git-Tag: 062012170305~17580^2~390^2~4034
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ff08c7b032fb17e4ffcda7497488dc5e263a7d6e;p=profile%2Fivi%2Fmesa.git

test for presence of both front and back color vertex slots
---

diff --git a/src/mesa/pipe/draw/draw_twoside.c b/src/mesa/pipe/draw/draw_twoside.c
index 7f0cb98..d987b00 100644
--- a/src/mesa/pipe/draw/draw_twoside.c
+++ b/src/mesa/pipe/draw/draw_twoside.c
@@ -68,6 +68,9 @@ static INLINE void copy_attrib( unsigned attr_dst,
 }
 
 
+/**
+ * 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 )
@@ -75,12 +78,12 @@ static struct vertex_header *copy_bfc( struct twoside_stage *twoside,
    struct vertex_header *tmp = dup_vert( &twoside->stage, v, idx );
    const struct draw_context *draw = twoside->stage.draw;
    
-   if (draw->attrib_front0 != -1) {
-      assert(draw->attrib_back0 != -1);
+   if (draw->attrib_front0 && draw->attrib_back0) {
+      assert(draw->attrib_back0);
       copy_attrib(draw->attrib_front0, draw->attrib_back0, tmp);
    }
-   if (draw->attrib_front1 != -1) {
-      assert(draw->attrib_back1 != -1);
+   if (draw->attrib_front1 && draw->attrib_back1) {
+      assert(draw->attrib_back1);
       copy_attrib(draw->attrib_front1, draw->attrib_back1, tmp);
    }