[Mesa-dev] [PATCH 3/5] st/mesa: don't translate blend state when it's disabled for a colorbuffer

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

---
 src/mesa/state_tracker/st_atom_blend.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mesa/state_tracker/st_atom_blend.c b/src/mesa/state_tracker/st_atom_blend.c
index 8f644ba..62042a6 100644
--- a/src/mesa/state_tracker/st_atom_blend.c
+++ b/src/mesa/state_tracker/st_atom_blend.c
@@ -154,22 +154,24 @@ st_update_blend( struct st_context *st )
       blend->independent_blend_enable = 1;
    }
    if (ctx->Color.ColorLogicOpEnabled) {
       /* logicop enabled */
       blend->logicop_enable = 1;
       blend->logicop_func = ctx->Color._LogicOp;
    }
    else if (ctx->Color.BlendEnabled && !ctx->Color._AdvancedBlendMode) {
       /* blending enabled */
       for (i = 0; i < num_state; i++) {
-         blend->rt[i].blend_enable = (ctx->Color.BlendEnabled >> i) & 0x1;
+         if (!(ctx->Color.BlendEnabled & (1 << i)))
+            continue;
 
+         blend->rt[i].blend_enable = 1;
          blend->rt[i].rgb_func =
             translate_blend(ctx->Color.Blend[i].EquationRGB);
 
          if (ctx->Color.Blend[i].EquationRGB == GL_MIN ||
              ctx->Color.Blend[i].EquationRGB == GL_MAX) {
             /* Min/max are special */
             blend->rt[i].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
             blend->rt[i].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
          }
          else {
-- 
2.7.4