Re-land: cc: Added antialiasing support for solid color layers

cc/gl_renderer_pixeltest.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/gl_renderer.h"
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "cc/compositor_frame_metadata.h"
 #include "cc/draw_quad.h"
@@ skipping 179 matching lines @@
   pass_list.push_back(child_pass.Pass());
   pass_list.push_back(root_pass.Pass());
 
   renderer_->setEnlargePassTextureAmountForTesting(gfx::Vector2d(50, 75));
   renderer_->decideRenderPassAllocationsForFrame(pass_list);
   renderer_->drawFrame(pass_list);
 
   EXPECT_TRUE(PixelsMatchReference(
       base::FilePath(FILE_PATH_LITERAL("blue_yellow.png")), viewport_rect));
 }
+
+// This test is flaky on Windows. We only enable it on Linux for now.

[jamesr, 2013/03/05 18:50:00]

Do we know why?

+#if defined(OS_LINUX)
+TEST_F(GLRendererPixelTest, AntiAliasing) {
+  gfx::Rect rect(0, 0, 200, 200);
+
+  RenderPass::Id id(1, 1);
+  scoped_ptr<RenderPass> pass = CreateTestRenderPass(id, rect);
+
+  gfx::Transform red_content_to_target_transform;
+  red_content_to_target_transform.Rotate(10);
+  scoped_ptr<SharedQuadState> red_shared_state =
+      CreateTestSharedQuadState(red_content_to_target_transform, rect);
+
+  scoped_ptr<SolidColorDrawQuad> red = SolidColorDrawQuad::Create();
+  red->SetNew(red_shared_state.get(), rect, SK_ColorRED);
+
+  pass->quad_list.push_back(red.PassAs<DrawQuad>());
+
+  gfx::Transform yellow_content_to_target_transform;
+  yellow_content_to_target_transform.Rotate(5);
+  scoped_ptr<SharedQuadState> yellow_shared_state =
+      CreateTestSharedQuadState(yellow_content_to_target_transform, rect);
+
+  scoped_ptr<SolidColorDrawQuad> yellow = SolidColorDrawQuad::Create();
+  yellow->SetNew(yellow_shared_state.get(), rect, SK_ColorYELLOW);
+
+  pass->quad_list.push_back(yellow.PassAs<DrawQuad>());
+
+  gfx::Transform blue_content_to_target_transform;
+  scoped_ptr<SharedQuadState> blue_shared_state =
+      CreateTestSharedQuadState(blue_content_to_target_transform, rect);
+
+  scoped_ptr<SolidColorDrawQuad> blue = SolidColorDrawQuad::Create();
+  blue->SetNew(blue_shared_state.get(), rect, SK_ColorBLUE);
+
+  pass->quad_list.push_back(blue.PassAs<DrawQuad>());
+
+  RenderPassList pass_list;
+  pass_list.push_back(pass.Pass());
+
+  renderer_->drawFrame(pass_list);
+
+  EXPECT_TRUE(PixelsMatchReference(
+      base::FilePath(FILE_PATH_LITERAL("anti_aliasing.png")), rect));
+}
+#endif  // defined(OS_LINUX)
+
 #endif
 
 }  // namespace
 }  // namespace cc