[Mesa-dev] [PATCH] st/mesa: Disable blending for integer formats.

[Kenneth Graunke]

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.
---
 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;
 
-- 
2.18.0