i965: Fix tex_swizzle when depth mode is GL_RED

Change swizzle from (x000) to (x001).

Signed-off-by: Chad Versace <chad.versace@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_wm.c b/src/mesa/drivers/dri/i965/brw_wm.c
index 390b3d6..ca17e80 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_wm.c
+++ b/src/mesa/drivers/dri/i965/brw_wm.c
@@ -377,9 +377,10 @@ static void brw_wm_populate_key( struct brw_context *brw,
            } else if (t->DepthMode == GL_LUMINANCE) {
               swizzles[3] = SWIZZLE_ONE;
            } else if (t->DepthMode == GL_RED) {
+              /* See table 3.23 of the GL 3.0 spec. */
               swizzles[1] = SWIZZLE_ZERO;
               swizzles[2] = SWIZZLE_ZERO;
-              swizzles[3] = SWIZZLE_ZERO;
+              swizzles[3] = SWIZZLE_ONE;
            }
         }