solid_color_layer_impl.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
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 "cc/layers/quad_sink.h"
8#include "cc/quads/solid_color_draw_quad.h"
9
10namespace cc {
11
12SolidColorLayerImpl::SolidColorLayerImpl(LayerTreeImpl* tree_impl, int id)
13    : LayerImpl(tree_impl, id),
14      tile_size_(256) {}
15
16SolidColorLayerImpl::~SolidColorLayerImpl() {}
17
18scoped_ptr<LayerImpl> SolidColorLayerImpl::CreateLayerImpl(
19    LayerTreeImpl* tree_impl) {
20  return SolidColorLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
21}
22
23void SolidColorLayerImpl::AppendQuads(QuadSink* quad_sink,
24                                      AppendQuadsData* append_quads_data) {
25  SharedQuadState* shared_quad_state =
26      quad_sink->UseSharedQuadState(CreateSharedQuadState());
27  AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
28
29  // We create a series of smaller quads instead of just one large one so that
30  // the culler can reduce the total pixels drawn.
31  int width = content_bounds().width();
32  int height = content_bounds().height();
33  for (int x = 0; x < width; x += tile_size_) {
34    for (int y = 0; y < height; y += tile_size_) {
35      gfx::Rect solid_tile_rect(x,
36                              y,
37                              std::min(width - x, tile_size_),
38                              std::min(height - y, tile_size_));
39      scoped_ptr<SolidColorDrawQuad> quad = SolidColorDrawQuad::Create();
40      quad->SetNew(shared_quad_state, solid_tile_rect, background_color());
41      quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
42    }
43  }
44}
45
46const char* SolidColorLayerImpl::LayerTypeAsString() const {
47  return "SolidColorLayer";
48}
49
50}  // namespace cc
51