ui_resource_layer_impl.cc revision 6d86b77056ed63eb6871182f42a9fd5f07550f90 
1// Copyright 2013 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/ui_resource_layer_impl.h"
6
7#include "base/strings/stringprintf.h"
8#include "base/values.h"
9#include "cc/base/math_util.h"
10#include "cc/layers/quad_sink.h"
11#include "cc/quads/texture_draw_quad.h"
12#include "cc/trees/layer_tree_impl.h"
13#include "ui/gfx/rect_f.h"
14
15namespace cc {
16
17UIResourceLayerImpl::UIResourceLayerImpl(LayerTreeImpl* tree_impl, int id)
18    : LayerImpl(tree_impl, id),
19      ui_resource_id_(0),
20      uv_top_left_(0.f, 0.f),
21      uv_bottom_right_(1.f, 1.f) {
22  vertex_opacity_[0] = 1.0f;
23  vertex_opacity_[1] = 1.0f;
24  vertex_opacity_[2] = 1.0f;
25  vertex_opacity_[3] = 1.0f;
26}
27
28UIResourceLayerImpl::~UIResourceLayerImpl() {}
29
30scoped_ptr<LayerImpl> UIResourceLayerImpl::CreateLayerImpl(
31    LayerTreeImpl* tree_impl) {
32  return UIResourceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
33}
34
35void UIResourceLayerImpl::PushPropertiesTo(LayerImpl* layer) {
36  LayerImpl::PushPropertiesTo(layer);
37  UIResourceLayerImpl* layer_impl = static_cast<UIResourceLayerImpl*>(layer);
38
39  layer_impl->SetUIResourceId(ui_resource_id_);
40  layer_impl->SetImageBounds(image_bounds_);
41  layer_impl->SetUV(uv_top_left_, uv_bottom_right_);
42  layer_impl->SetVertexOpacity(vertex_opacity_);
43}
44
45void UIResourceLayerImpl::SetUIResourceId(UIResourceId uid) {
46  if (uid == ui_resource_id_)
47    return;
48  ui_resource_id_ = uid;
49  NoteLayerPropertyChanged();
50}
51
52void UIResourceLayerImpl::SetImageBounds(const gfx::Size& image_bounds) {
53  // This check imposes an ordering on the call sequence.  An UIResource must
54  // exist before SetImageBounds can be called.
55  DCHECK(ui_resource_id_);
56
57  if (image_bounds_ == image_bounds)
58    return;
59
60  image_bounds_ = image_bounds;
61
62  NoteLayerPropertyChanged();
63}
64
65void UIResourceLayerImpl::SetUV(const gfx::PointF& top_left,
66                                const gfx::PointF& bottom_right) {
67  if (uv_top_left_ == top_left && uv_bottom_right_ == bottom_right)
68    return;
69  uv_top_left_ = top_left;
70  uv_bottom_right_ = bottom_right;
71  NoteLayerPropertyChanged();
72}
73
74void UIResourceLayerImpl::SetVertexOpacity(const float vertex_opacity[4]) {
75  if (vertex_opacity_[0] == vertex_opacity[0] &&
76      vertex_opacity_[1] == vertex_opacity[1] &&
77      vertex_opacity_[2] == vertex_opacity[2] &&
78      vertex_opacity_[3] == vertex_opacity[3])
79    return;
80  vertex_opacity_[0] = vertex_opacity[0];
81  vertex_opacity_[1] = vertex_opacity[1];
82  vertex_opacity_[2] = vertex_opacity[2];
83  vertex_opacity_[3] = vertex_opacity[3];
84  NoteLayerPropertyChanged();
85}
86
87bool UIResourceLayerImpl::WillDraw(DrawMode draw_mode,
88                                  ResourceProvider* resource_provider) {
89  if (!ui_resource_id_ || draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
90    return false;
91  return LayerImpl::WillDraw(draw_mode, resource_provider);
92}
93
94void UIResourceLayerImpl::AppendQuads(QuadSink* quad_sink,
95                                     AppendQuadsData* append_quads_data) {
96  SharedQuadState* shared_quad_state = quad_sink->CreateSharedQuadState();
97  PopulateSharedQuadState(shared_quad_state);
98
99  AppendDebugBorderQuad(
100      quad_sink, content_bounds(), shared_quad_state, append_quads_data);
101
102  if (!ui_resource_id_)
103    return;
104
105  ResourceProvider::ResourceId resource =
106      layer_tree_impl()->ResourceIdForUIResource(ui_resource_id_);
107
108  if (!resource)
109    return;
110
111  static const bool flipped = false;
112  static const bool premultiplied_alpha = true;
113
114  DCHECK(!bounds().IsEmpty());
115
116  bool opaque = layer_tree_impl()->IsUIResourceOpaque(ui_resource_id_) ||
117                contents_opaque();
118
119  gfx::Rect quad_rect(bounds());
120  gfx::Rect opaque_rect(opaque ? quad_rect : gfx::Rect());
121  gfx::Rect visible_quad_rect = quad_sink->UnoccludedContentRect(
122      quad_rect, draw_properties().target_space_transform);
123  if (visible_quad_rect.IsEmpty())
124    return;
125
126  scoped_ptr<TextureDrawQuad> quad = TextureDrawQuad::Create();
127  quad->SetNew(shared_quad_state,
128               quad_rect,
129               opaque_rect,
130               visible_quad_rect,
131               resource,
132               premultiplied_alpha,
133               uv_top_left_,
134               uv_bottom_right_,
135               SK_ColorTRANSPARENT,
136               vertex_opacity_,
137               flipped);
138  quad_sink->Append(quad.PassAs<DrawQuad>());
139}
140
141const char* UIResourceLayerImpl::LayerTypeAsString() const {
142  return "cc::UIResourceLayerImpl";
143}
144
145base::DictionaryValue* UIResourceLayerImpl::LayerTreeAsJson() const {
146  base::DictionaryValue* result = LayerImpl::LayerTreeAsJson();
147
148  result->Set("ImageBounds", MathUtil::AsValue(image_bounds_).release());
149
150  base::ListValue* list = new base::ListValue;
151  list->AppendDouble(vertex_opacity_[0]);
152  list->AppendDouble(vertex_opacity_[1]);
153  list->AppendDouble(vertex_opacity_[2]);
154  list->AppendDouble(vertex_opacity_[3]);
155  result->Set("VertexOpacity", list);
156
157  result->Set("UVTopLeft", MathUtil::AsValue(uv_top_left_).release());
158  result->Set("UVBottomRight", MathUtil::AsValue(uv_bottom_right_).release());
159
160  return result;
161}
162
163}  // namespace cc
164