Mesa (master): swr: allow alphatest without blend or logicop

[Tim Rowley]

Module: Mesa
Branch: master
Commit: 95ed1c19bf379ace583adfe520e1673675d17062
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=95ed1c19bf379ace583adfe520e1673675d17062

Author: Tim Rowley <timothy.o.rowley at intel.com>
Date:   Fri Nov  4 13:10:56 2016 -0500

swr: allow alphatest without blend or logicop

We need to compile a blend function when alphatest is enabled.

Reviewed-by: Bruce Cherniak <bruce.cherniak at intel.com>

---

 src/gallium/drivers/swr/swr_state.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/swr/swr_state.cpp b/src/gallium/drivers/swr/swr_state.cpp
index 3e02322..424bff2 100644
--- a/src/gallium/drivers/swr/swr_state.cpp
+++ b/src/gallium/drivers/swr/swr_state.cpp
@@ -1300,7 +1300,8 @@ swr_update_derived(struct pipe_context *pipe,
                    sizeof(compileState.blendState));
 
             if (compileState.blendState.blendEnable == false &&
-                compileState.blendState.logicOpEnable == false) {
+                compileState.blendState.logicOpEnable == false &&
+                ctx->depth_stencil->alpha.enabled == 0) {
                SwrSetBlendFunc(ctx->swrContext, target, NULL);
                continue;
             }