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 111 matching lines @@
                rect,          // contents_changed_since_last_frame
                gfx::RectF(),  // mask_uv_rect
                WebKit::WebFilterOperations(),   // foreground filters
                skia::RefPtr<SkImageFilter>(),   // foreground filter
                WebKit::WebFilterOperations());  // background filters
 
   return quad.PassAs<DrawQuad>();
 }
 
 
 #if !defined(OS_ANDROID)

[reveman, 2013/03/13 00:33:38]

can we remove this too now? lets not change it in this cl but as a follow up if
possible.

[jamesr, 2013/03/13 00:35:10]

Not trivially.  We don't have anything set up to build osmesa for android right
now and if we did running these tests through osmesa on an android device would
probably suck pretty hard.  I don't think we should have unit tests depending on
actual GL drivers, so I think we're stuck.

 TEST_F(GLRendererPixelTest, simpleGreenRect) {
   gfx::Rect rect(0, 0, 200, 200);
 
   RenderPass::Id id(1, 1);
   scoped_ptr<RenderPass> pass = CreateTestRenderPass(id, rect);
 
   gfx::Transform content_to_target_transform;
   scoped_ptr<SharedQuadState> shared_state =
       CreateTestSharedQuadState(content_to_target_transform, rect);
 
@@ skipping 47 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));
 }
+
+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
 
 }  // namespace
 }  // namespace cc