st/mesa: disable alpha-test, alpha-to-coverage, alpha-to-one for integer FBs

v2: rebased

Reviewed-by: Brian Paul <[email protected]>

2 files changed, 4 insertions, 2 deletions

diff --git a/src/mesa/state_tracker/st_atom_blend.c b/src/mesa/state_tracker/st_atom_blend.c
index 76d6a644a58..b8d65bde29e 100644
--- a/src/mesa/state_tracker/st_atom_blend.c
+++ b/src/mesa/state_tracker/st_atom_blend.c
@@ -266,7 +266,8 @@ update_blend( struct st_context *st )
    blend->dither = ctx->Color.DitherFlag;
 
    if (ctx->Multisample.Enabled &&
-       ctx->DrawBuffer->Visual.sampleBuffers > 0) {
+       ctx->DrawBuffer->Visual.sampleBuffers > 0 &&
+       !(ctx->DrawBuffer->_IntegerBuffers & 0x1)) {
       /* Unlike in gallium/d3d10 these operations are only performed
        * if both msaa is enabled and we have a multisample buffer.
        */
diff --git a/src/mesa/state_tracker/st_atom_depth.c b/src/mesa/state_tracker/st_atom_depth.c
index 267b42c539f..7092c3f83ec 100644
--- a/src/mesa/state_tracker/st_atom_depth.c
+++ b/src/mesa/state_tracker/st_atom_depth.c
@@ -149,7 +149,8 @@ update_depth_stencil_alpha(struct st_context *st)
       }
    }
 
-   if (ctx->Color.AlphaEnabled) {
+   if (ctx->Color.AlphaEnabled &&
+       !(ctx->DrawBuffer->_IntegerBuffers & 0x1)) {
       dsa->alpha.enabled = 1;
       dsa->alpha.func = st_compare_func_to_pipe(ctx->Color.AlphaFunc);
       dsa->alpha.ref_value = ctx->Color.AlphaRefUnclamped;