[Mesa-dev] [PATCH 1/3] 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 | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/mesa/state_tracker/st_atom_blend.c b/src/mesa/state_tracker/st_atom_blend.c
index f7327d6..a5f7edb 100644
--- a/src/mesa/state_tracker/st_atom_blend.c
+++ b/src/mesa/state_tracker/st_atom_blend.c
@@ -154,26 +154,27 @@ 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, j = 0; i < num_state; i++) {
+         if (!(ctx->Color.BlendEnabled & (1 << i)))
+            continue;
 
-         blend->rt[i].blend_enable = (ctx->Color.BlendEnabled >> i) & 0x1;
-
-         if (ctx->Extensions.ARB_draw_buffers_blend)
+	 if (ctx->Extensions.ARB_draw_buffers_blend)
             j = i;
 
+         blend->rt[i].blend_enable = 1;
          blend->rt[i].rgb_func =
             translate_blend(ctx->Color.Blend[j].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