src/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   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   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());
  73 }
  74
  75 void UIResourceLayer::SetUV(const gfx::PointF& top_left,
  76                             const gfx::PointF& bottom_right) {
  77   if (uv_top_left_ == top_left && uv_bottom_right_ == bottom_right)
  78     return;
  79   uv_top_left_ = top_left;
  80   uv_bottom_right_ = bottom_right;
  81   SetNeedsCommit();
  82 }
  83
  84 void UIResourceLayer::SetVertexOpacity(float bottom_left,
  85                                        float top_left,
  86                                        float top_right,
  87                                        float bottom_right) {
  88   // Indexing according to the quad vertex generation:
  89   // 1--2
  90   // |  |
  91   // 0--3
  92   if (vertex_opacity_[0] == bottom_left &&
  93       vertex_opacity_[1] == top_left &&
  94       vertex_opacity_[2] == top_right &&
  95       vertex_opacity_[3] == bottom_right)
  96     return;
  97   vertex_opacity_[0] = bottom_left;
  98   vertex_opacity_[1] = top_left;
  99   vertex_opacity_[2] = top_right;
 100   vertex_opacity_[3] = bottom_right;
 101   SetNeedsCommit();
 102 }
 103
 104 void UIResourceLayer::SetLayerTreeHost(LayerTreeHost* host) {
 105   if (host == layer_tree_host())
 106     return;
 107
 108   Layer::SetLayerTreeHost(host);
 109
 110   // Recreate the resource hold against the new LTH.
 111   RecreateUIResourceHolder();
 112 }
 113
 114 void UIResourceLayer::RecreateUIResourceHolder() {
 115   ui_resource_holder_ = nullptr;
 116   if (layer_tree_host() && !bitmap_.empty()) {
 117     ui_resource_holder_ =
 118         ScopedUIResourceHolder::Create(layer_tree_host(), bitmap_);
 119   }
 120   UpdateDrawsContent(HasDrawableContent());
 121 }
 122
 123 void UIResourceLayer::SetBitmap(const SkBitmap& skbitmap) {
 124   bitmap_ = skbitmap;
 125
 126   RecreateUIResourceHolder();
 127   SetNeedsCommit();
 128 }
 129
 130 void UIResourceLayer::SetUIResourceId(UIResourceId resource_id) {
 131   if (ui_resource_holder_ && ui_resource_holder_->id() == resource_id)
 132     return;
 133
 134   if (resource_id)
 135     ui_resource_holder_ = SharedUIResourceHolder::Create(resource_id);
 136   else
 137     ui_resource_holder_ = nullptr;
 138
 139   UpdateDrawsContent(HasDrawableContent());
 140   SetNeedsCommit();
 141 }
 142
 143 bool UIResourceLayer::HasDrawableContent() const {
 144   return ui_resource_holder_ && ui_resource_holder_->id() &&
 145          Layer::HasDrawableContent();
 146 }
 147
 148 void UIResourceLayer::PushPropertiesTo(LayerImpl* layer) {
 149   Layer::PushPropertiesTo(layer);
 150   UIResourceLayerImpl* layer_impl = static_cast<UIResourceLayerImpl*>(layer);
 151
 152   if (!ui_resource_holder_) {
 153     layer_impl->SetUIResourceId(0);
 154   } else {
 155     DCHECK(layer_tree_host());
 156
 157     gfx::Size image_size =
 158         layer_tree_host()->GetUIResourceSize(ui_resource_holder_->id());
 159     layer_impl->SetUIResourceId(ui_resource_holder_->id());
 160     layer_impl->SetImageBounds(image_size);
 161     layer_impl->SetUV(uv_top_left_, uv_bottom_right_);
 162     layer_impl->SetVertexOpacity(vertex_opacity_);
 163   }
 164 }
 165
 166 }  // namespace cc