cc/layers/solid_color_layer_impl.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/layers/solid_color_layer_impl.h"
   6
   7 #include <algorithm>
   8
   9 #include "cc/layers/quad_sink.h"
  10 #include "cc/quads/solid_color_draw_quad.h"
  11
  12 namespace cc {
  13
  14 SolidColorLayerImpl::SolidColorLayerImpl(LayerTreeImpl* tree_impl, int id)
  15     : LayerImpl(tree_impl, id),
  16       tile_size_(256) {}
  17
  18 SolidColorLayerImpl::~SolidColorLayerImpl() {}
  19
  20 scoped_ptr<LayerImpl> SolidColorLayerImpl::CreateLayerImpl(
  21     LayerTreeImpl* tree_impl) {
  22   return SolidColorLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
  23 }
  24
  25 void SolidColorLayerImpl::AppendQuads(QuadSink* quad_sink,
  26                                       AppendQuadsData* append_quads_data) {
  27   SharedQuadState* shared_quad_state =
  28       quad_sink->UseSharedQuadState(CreateSharedQuadState());
  29   AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
  30
  31   // We create a series of smaller quads instead of just one large one so that
  32   // the culler can reduce the total pixels drawn.
  33   int width = content_bounds().width();
  34   int height = content_bounds().height();
  35   for (int x = 0; x < width; x += tile_size_) {
  36     for (int y = 0; y < height; y += tile_size_) {
  37       gfx::Rect solid_tile_rect(x,
  38                               y,
  39                               std::min(width - x, tile_size_),
  40                               std::min(height - y, tile_size_));
  41       scoped_ptr<SolidColorDrawQuad> quad = SolidColorDrawQuad::Create();
  42       quad->SetNew(
  43           shared_quad_state, solid_tile_rect, background_color(), false);
  44       quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
  45     }
  46   }
  47 }
  48
  49 const char* SolidColorLayerImpl::LayerTypeAsString() const {
  50   return "cc::SolidColorLayerImpl";
  51 }
  52
  53 }  // namespace cc