Use the solid color detection to create solid layers

cc/layers/solid_color_layer_impl.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/layers/solid_color_layer_impl.h"
 
 #include <algorithm>
 
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/trees/occlusion_tracker.h"
 
 namespace cc {
 
+namespace {
+const int kSolidQuadTileSize = 256;
+}
+
 SolidColorLayerImpl::SolidColorLayerImpl(LayerTreeImpl* tree_impl, int id)
-    : LayerImpl(tree_impl, id),
-      tile_size_(256) {}
+    : LayerImpl(tree_impl, id) {
+}
 
 SolidColorLayerImpl::~SolidColorLayerImpl() {}
 
 scoped_ptr<LayerImpl> SolidColorLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
   return SolidColorLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
 }
 
-void SolidColorLayerImpl::AppendQuads(
+void SolidColorLayerImpl::AppendSolidQuads(
     RenderPass* render_pass,
     const OcclusionTracker<LayerImpl>& occlusion_tracker,
-    AppendQuadsData* append_quads_data) {
-  SharedQuadState* shared_quad_state =
-      render_pass->CreateAndAppendSharedQuadState();
-  PopulateSharedQuadState(shared_quad_state);
-
-  AppendDebugBorderQuad(
-      render_pass, content_bounds(), shared_quad_state, append_quads_data);
-
-  Occlusion occlusion = occlusion_tracker.GetCurrentOcclusionForLayer(
-      draw_properties().target_space_transform);
+    SharedQuadState* shared_quad_state,
+    const gfx::Size& content_bounds,
+    const gfx::Transform& target_space_transform,
+    SkColor color) {
+  Occlusion occlusion =
+      occlusion_tracker.GetCurrentOcclusionForLayer(target_space_transform);
 
   // We create a series of smaller quads instead of just one large one so that
   // the culler can reduce the total pixels drawn.
-  int width = content_bounds().width();
-  int height = content_bounds().height();
-  for (int x = 0; x < width; x += tile_size_) {
-    for (int y = 0; y < height; y += tile_size_) {
+  int width = content_bounds.width();
+  int height = content_bounds.height();
+  for (int x = 0; x < width; x += kSolidQuadTileSize) {
+    for (int y = 0; y < height; y += kSolidQuadTileSize) {
       gfx::Rect quad_rect(x,
                           y,
-                          std::min(width - x, tile_size_),
-                          std::min(height - y, tile_size_));
+                          std::min(width - x, kSolidQuadTileSize),
+                          std::min(height - y, kSolidQuadTileSize));
       gfx::Rect visible_quad_rect =
           occlusion.GetUnoccludedContentRect(quad_rect);
       if (visible_quad_rect.IsEmpty())
         continue;
 
       SolidColorDrawQuad* quad =
           render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
-      quad->SetNew(shared_quad_state,
-                   quad_rect,
-                   visible_quad_rect,
-                   background_color(),
-                   false);
+      quad->SetNew(
+          shared_quad_state, quad_rect, visible_quad_rect, color, false);
     }
   }
 }
 
+void SolidColorLayerImpl::AppendQuads(
+    RenderPass* render_pass,
+    const OcclusionTracker<LayerImpl>& occlusion_tracker,
+    AppendQuadsData* append_quads_data) {
+  SharedQuadState* shared_quad_state =
+      render_pass->CreateAndAppendSharedQuadState();
+  PopulateSharedQuadState(shared_quad_state);
+
+  AppendDebugBorderQuad(
+      render_pass, content_bounds(), shared_quad_state, append_quads_data);
+
+  AppendSolidQuads(render_pass,
+                   occlusion_tracker,
+                   shared_quad_state,
+                   content_bounds(),
+                   draw_properties().target_space_transform,
+                   background_color());
+}
+
 const char* SolidColorLayerImpl::LayerTypeAsString() const {
   return "cc::SolidColorLayerImpl";
 }
 
 }  // namespace cc