llvmpipe: check bitshift against PIPE_MAX_SHADER_OUTPUTS

2010-09-20 15:33:49 -06:00
parent a7ea4d11fb
commit 1662c31703
1 changed files with 5 additions and 2 deletions
@@ -188,8 +188,11 @@ setup_point_coefficients( struct lp_setup_context *setup,
          */
         if (shader->info.input_semantic_name[slot] == TGSI_SEMANTIC_GENERIC) {
            const int index = shader->info.input_semantic_index[slot];
-            
-            if (setup->sprite_coord_enable & (1 << index)) {
+            /* Note that sprite_coord enable is a bitfield of
+             * PIPE_MAX_SHADER_OUTPUTS bits.
+             */
+            if (index < PIPE_MAX_SHADER_OUTPUTS &&
+                (setup->sprite_coord_enable & (1 << index))) {
               for (i = 0; i < NUM_CHANNELS; i++)
                  if (usage_mask & (1 << i))
                     perspective_coef(setup, point, info, slot+1, vert_attr, i,