From 47b883e42ba5f6948ce8050d5a3c7849ba2a1cec Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 12 Nov 2008 16:44:47 -0700
Subject: mesa: fix bug in GLSL built-in matrix state lookup

---
 src/mesa/shader/slang/slang_builtin.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/mesa/shader/slang/slang_builtin.c b/src/mesa/shader/slang/slang_builtin.c
index ed6de40d4b..fdcd3714a5 100644
--- a/src/mesa/shader/slang/slang_builtin.c
+++ b/src/mesa/shader/slang/slang_builtin.c
@@ -109,10 +109,13 @@ lookup_statevar(const char *var, GLint index1, GLint index2, const char *field,
    if (isMatrix) {
       if (tokens[0] == STATE_TEXTURE_MATRIX) {
          if (index1 >= 0) {
-            tokens[1] = index1;
-            index1 = 0; /* prevent extra addition at end of function */
+            tokens[1] = index1; /* which texture matrix */
          }
       }
+      if (index1 < 0) {
+         /* index1 is unused: prevent extra addition at end of function */
+         index1 = 0;
+      }
    }
    else if (strcmp(var, "gl_DepthRange") == 0) {
       tokens[0] = STATE_DEPTH_RANGE;
-- 
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