cc/layers/ui_resource_layer.cc

   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.h"
   6
   7 #include "cc/layers/ui_resource_layer_impl.h"
   8 #include "cc/resources/prioritized_resource.h"
   9 #include "cc/resources/resource_update.h"
  10 #include "cc/resources/resource_update_queue.h"
  11 #include "cc/resources/scoped_ui_resource.h"
  12 #include "cc/resources/ui_resource_bitmap.h"
  13 #include "cc/trees/layer_tree_host.h"
  14
  15 namespace cc {
  16
  17
  18 namespace {
  19
  20 class ScopedUIResourceHolder : public UIResourceLayer::UIResourceHolder {
  21  public:
  22   static scoped_ptr<ScopedUIResourceHolder> Create(LayerTreeHost* host,
  23                                             const SkBitmap& skbitmap) {
  24     return make_scoped_ptr(new ScopedUIResourceHolder(host, skbitmap));
  25   }
  26   virtual UIResourceId id() OVERRIDE { return resource_->id(); }
  27
  28  private:
  29   ScopedUIResourceHolder(LayerTreeHost* host, const SkBitmap& skbitmap) {
  30     resource_ = ScopedUIResource::Create(host, UIResourceBitmap(skbitmap));
  31   }
  32
  33   scoped_ptr<ScopedUIResource> resource_;
  34 };
  35
  36 class SharedUIResourceHolder : public UIResourceLayer::UIResourceHolder {
  37  public:
  38   static scoped_ptr<SharedUIResourceHolder> Create(UIResourceId id) {
  39     return make_scoped_ptr(new SharedUIResourceHolder(id));
  40   }
  41
  42   virtual UIResourceId id() OVERRIDE { return id_; }
  43
  44  private:
  45   explicit SharedUIResourceHolder(UIResourceId id) : id_(id) {}
  46
  47   UIResourceId id_;
  48 };
  49
  50 }  // anonymous namespace
  51
  52 UIResourceLayer::UIResourceHolder::~UIResourceHolder() {}
  53
  54 scoped_refptr<UIResourceLayer> UIResourceLayer::Create() {
  55   return make_scoped_refptr(new UIResourceLayer());
  56 }
  57
  58 UIResourceLayer::UIResourceLayer()
  59     : Layer(),
  60       uv_top_left_(0.f, 0.f),
  61       uv_bottom_right_(1.f, 1.f) {
  62   vertex_opacity_[0] = 1.0f;
  63   vertex_opacity_[1] = 1.0f;
  64   vertex_opacity_[2] = 1.0f;
  65   vertex_opacity_[3] = 1.0f;
  66 }
  67
  68 UIResourceLayer::~UIResourceLayer() {}
  69
  70 scoped_ptr<LayerImpl> UIResourceLayer::CreateLayerImpl(
  71     LayerTreeImpl* tree_impl) {
  72   return UIResourceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
  73 }
  74
  75 void UIResourceLayer::SetUV(gfx::PointF top_left, gfx::PointF bottom_right) {
  76   if (uv_top_left_ == top_left && uv_bottom_right_ == bottom_right)
  77     return;
  78   uv_top_left_ = top_left;
  79   uv_bottom_right_ = bottom_right;
  80   SetNeedsCommit();
  81 }
  82
  83 void UIResourceLayer::SetVertexOpacity(float bottom_left,
  84                                        float top_left,
  85                                        float top_right,
  86                                        float bottom_right) {
  87   // Indexing according to the quad vertex generation:
  88   // 1--2
  89   // |  |
  90   // 0--3
  91   if (vertex_opacity_[0] == bottom_left &&
  92       vertex_opacity_[1] == top_left &&
  93       vertex_opacity_[2] == top_right &&
  94       vertex_opacity_[3] == bottom_right)
  95     return;
  96   vertex_opacity_[0] = bottom_left;
  97   vertex_opacity_[1] = top_left;
  98   vertex_opacity_[2] = top_right;
  99   vertex_opacity_[3] = bottom_right;
 100   SetNeedsCommit();
 101 }
 102
 103 void UIResourceLayer::SetLayerTreeHost(LayerTreeHost* host) {
 104   if (host == layer_tree_host())
 105     return;
 106
 107   Layer::SetLayerTreeHost(host);
 108
 109   // Recreate the resource hold against the new LTH.
 110   RecreateUIResourceHolder();
 111 }
 112
 113 void UIResourceLayer::RecreateUIResourceHolder() {
 114   ui_resource_holder_.reset();
 115   if (!layer_tree_host() || bitmap_.empty())
 116     return;
 117
 118   ui_resource_holder_ =
 119     ScopedUIResourceHolder::Create(layer_tree_host(), bitmap_);
 120 }
 121
 122 void UIResourceLayer::SetBitmap(const SkBitmap& skbitmap) {
 123   bitmap_ = skbitmap;
 124
 125   RecreateUIResourceHolder();
 126   SetNeedsCommit();
 127 }
 128
 129 void UIResourceLayer::SetUIResourceId(UIResourceId resource_id) {
 130   if (ui_resource_holder_ && ui_resource_holder_->id() == resource_id)
 131     return;
 132
 133   if (resource_id) {
 134     ui_resource_holder_ = SharedUIResourceHolder::Create(resource_id);
 135   } else {
 136     ui_resource_holder_.reset();
 137   }
 138
 139   SetNeedsCommit();
 140 }
 141
 142 bool UIResourceLayer::DrawsContent() const {
 143   return ui_resource_holder_ && ui_resource_holder_->id() &&
 144          Layer::DrawsContent();
 145 }
 146
 147 void UIResourceLayer::PushPropertiesTo(LayerImpl* layer) {
 148   Layer::PushPropertiesTo(layer);
 149   UIResourceLayerImpl* layer_impl = static_cast<UIResourceLayerImpl*>(layer);
 150
 151   if (!ui_resource_holder_) {
 152     layer_impl->SetUIResourceId(0);
 153   } else {
 154     DCHECK(layer_tree_host());
 155
 156     gfx::Size image_size =
 157         layer_tree_host()->GetUIResourceSize(ui_resource_holder_->id());
 158     layer_impl->SetUIResourceId(ui_resource_holder_->id());
 159     layer_impl->SetImageBounds(image_size);
 160     layer_impl->SetUV(uv_top_left_, uv_bottom_right_);
 161     layer_impl->SetVertexOpacity(vertex_opacity_);
 162   }
 163 }
 164
 165 }  // namespace cc