From 8fb966688bc1053a48e8ee7f7394ce030bcfd345 Mon Sep 17 00:00:00 2001
From: Kenneth Graunke <kenneth@whitecape.org>
Date: Fri, 24 Aug 2018 23:45:27 -0700
Subject: [PATCH] st/mesa: Disable blending for integer formats.
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Blending isn't valid for integer formats.  Rather than having drivers
worry about this, just disable blending in this case.  This hopefully
will increase hits in the CSO cache as well, by eliminating most of the
meaningless fields in this case.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
---
 src/mesa/state_tracker/st_atom_blend.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mesa/state_tracker/st_atom_blend.c b/src/mesa/state_tracker/st_atom_blend.c
index 57400e2e791..804de2f154f 100644
--- a/src/mesa/state_tracker/st_atom_blend.c
+++ b/src/mesa/state_tracker/st_atom_blend.c
@@ -171,6 +171,7 @@ st_update_blend( struct st_context *st )
       /* blending enabled */
       for (i = 0, j = 0; i < num_state; i++) {
          if (!(ctx->Color.BlendEnabled & (1 << i)) ||
+             (ctx->DrawBuffer->_IntegerBuffers & (1 << i)) ||
              !blend->rt[i].colormask)
             continue;