when automatically binding vertex attributes, start with attrib 1, not 0

2007-01-16 14:52:22 -07:00
parent 4f027a33b9
commit 9b5dc1358a
1 changed files with 5 additions and 2 deletions
@@ -363,8 +363,11 @@ _slang_resolve_attributes(struct gl_shader_program *shProg,
               attr = shProg->Attributes->Parameters[index].StateIndexes[0];
            }
            else {
-               /* not found, choose our own attribute number */
-               for (attr = 0; attr < MAX_VERTEX_ATTRIBS; attr++) {
+               /* Not found, choose our own attribute number.
+                * Start at 1 since generic attribute 0 always aliases
+                * glVertex/position.
+                */
+               for (attr = 1; attr < MAX_VERTEX_ATTRIBS; attr++) {
                  if (((1 << attr) & usedAttributes) == 0)
                     break;
               }