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-rw-r--r--src/mesa/drivers/dri/i965/brw_wm_surface_state.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 932e4728f27..7e4cc91c5f2 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -773,7 +773,8 @@ brw_get_texture_swizzle(const struct gl_context *ctx,
case GL_RED:
case GL_RG:
case GL_RGB:
- swizzles[3] = SWIZZLE_ONE;
+ if (_mesa_get_format_bits(img->TexFormat, GL_ALPHA_BITS) > 0)
+ swizzles[3] = SWIZZLE_ONE;
break;
}