[Mesa-dev] [PATCH 5/6] i965: Fix tex_swizzle when depth mode is GL_RED

[Chad Versace]

Change swizzle from (x000) to (x001).

Test-case: piglit:spec/ARB_texture_rg/fs-shadow2d-red-01
Test-case: piglit:spec/ARB_texture_rg/fs-shadow2d-red-02
Test-case: piglit:spec/ARB_texture_rg/fs-shadow2d-red-03

Signed-off-by: Chad Versace <chad.versace at intel.com>
---
 src/mesa/drivers/dri/i965/brw_wm.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_wm.c b/src/mesa/drivers/dri/i965/brw_wm.c
index d3e5107..797b8e2 100644
--- a/src/mesa/drivers/dri/i965/brw_wm.c
+++ b/src/mesa/drivers/dri/i965/brw_wm.c
@@ -379,9 +379,10 @@ 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;
 	    }
 	 }
 
-- 
1.7.4