mix-blend-mode implementation for accelerated layers

cc/quads/draw_quad_unittest.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/quads/draw_quad.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 18 matching lines @@
 namespace cc {
 namespace {
 
 TEST(DrawQuadTest, CopySharedQuadState) {
   gfx::Transform quad_transform = gfx::Transform(1.0, 0.0, 0.5, 1.0, 0.5, 0.0);
   gfx::Size content_bounds(26, 28);
   gfx::Rect visible_content_rect(10, 12, 14, 16);
   gfx::Rect clip_rect(19, 21, 23, 25);
   bool is_clipped = true;
   float opacity = 0.25f;
+  SkXfermode::Mode blend_mode = SkXfermode::kMultiply_Mode;
 
   scoped_ptr<SharedQuadState> state(SharedQuadState::Create());
   state->SetAll(quad_transform,
                 content_bounds,
                 visible_content_rect,
                 clip_rect,
                 is_clipped,
-                opacity);
+                opacity,
+                blend_mode);
 
   scoped_ptr<SharedQuadState> copy(state->Copy());
   EXPECT_EQ(quad_transform, copy->content_to_target_transform);
   EXPECT_RECT_EQ(visible_content_rect, copy->visible_content_rect);
   EXPECT_EQ(opacity, copy->opacity);
   EXPECT_RECT_EQ(clip_rect, copy->clip_rect);
   EXPECT_EQ(is_clipped, copy->is_clipped);
+  EXPECT_EQ(blend_mode, copy->blend_mode);
 }
 
 scoped_ptr<SharedQuadState> CreateSharedQuadState() {
   gfx::Transform quad_transform = gfx::Transform(1.0, 0.0, 0.5, 1.0, 0.5, 0.0);
   gfx::Size content_bounds(26, 28);
   gfx::Rect visible_content_rect(10, 12, 14, 16);
   gfx::Rect clip_rect(19, 21, 23, 25);
   bool is_clipped = false;
   float opacity = 1.f;
+  SkXfermode::Mode blend_mode = SkXfermode::kSrcOver_Mode;
 
   scoped_ptr<SharedQuadState> state(SharedQuadState::Create());
   state->SetAll(quad_transform,
                 content_bounds,
                 visible_content_rect,
                 clip_rect,
                 is_clipped,
-                opacity);
+                opacity,
+                blend_mode);
   return state.Pass();
 }
 
 void CompareDrawQuad(DrawQuad* quad,
                      DrawQuad* copy,
                      SharedQuadState* copy_shared_state) {
   EXPECT_EQ(quad->material, copy->material);
   EXPECT_RECT_EQ(quad->rect, copy->rect);
   EXPECT_RECT_EQ(quad->visible_rect, copy->visible_rect);
   EXPECT_RECT_EQ(quad->opaque_rect, copy->opaque_rect);
@@ skipping 739 matching lines @@
                     texture_format,
                     content_rect,
                     contents_scale,
                     can_draw_direct_to_backbuffer,
                     picture_pile);
   EXPECT_EQ(0, IterateAndCount(quad_new.get()));
 }
 
 }  // namespace
 }  // namespace cc