Mesa (master): i965: Restrict fast color clear on first slice only

[Topi Pohjolainen]

Module: Mesa
Branch: master
Commit: dea8e7fb07888959f9ea4f361744ba6b47e8bf9d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dea8e7fb07888959f9ea4f361744ba6b47e8bf9d

Author: Topi Pohjolainen <topi.pohjolainen at intel.com>
Date:   Tue Jun 14 09:10:16 2016 +0300

i965: Restrict fast color clear on first slice only

Signed-off-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

---

 src/mesa/drivers/dri/i965/brw_blorp.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_blorp.c b/src/mesa/drivers/dri/i965/brw_blorp.c
index d900e15..57b6f8b 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp.c
+++ b/src/mesa/drivers/dri/i965/brw_blorp.c
@@ -819,6 +819,14 @@ do_single_blorp_clear(struct brw_context *brw, struct gl_framebuffer *fb,
       intel_miptree_get_fast_clear_state(irb->mt, irb->mt_level,
                                          logical_layer);
 
+   /* Surface state can only record one fast clear color value. Therefore
+    * unless different levels/layers agree on the color it can be used to
+    * represent only single level/layer. Here it will be reserved for the
+    * first slice (level 0, layer 0).
+    */
+   if (irb->layer_count > 1 || irb->mt_level || irb->mt_layer)
+      can_fast_clear = false;
+
    if (can_fast_clear) {
       union gl_color_union override_color =
          brw_meta_convert_fast_clear_color(brw, irb->mt,