src/cc/trees/layer_tree_impl.h

   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 #ifndef CC_TREES_LAYER_TREE_IMPL_H_
   6 #define CC_TREES_LAYER_TREE_IMPL_H_
   7
   8 #include <list>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/containers/hash_tables.h"
  13 #include "base/values.h"
  14 #include "cc/base/scoped_ptr_vector.h"
  15 #include "cc/base/swap_promise.h"
  16 #include "cc/layers/layer_impl.h"
  17 #include "cc/output/renderer.h"
  18 #include "cc/resources/ui_resource_client.h"
  19
  20 #if defined(COMPILER_GCC)
  21 namespace BASE_HASH_NAMESPACE {
  22 template<>
  23 struct hash<cc::LayerImpl*> {
  24   size_t operator()(cc::LayerImpl* ptr) const {
  25     return hash<size_t>()(reinterpret_cast<size_t>(ptr));
  26   }
  27 };
  28 }  // namespace BASE_HASH_NAMESPACE
  29 #endif  // COMPILER
  30
  31 namespace cc {
  32
  33 class ContextProvider;
  34 class DebugRectHistory;
  35 class FrameRateCounter;
  36 class HeadsUpDisplayLayerImpl;
  37 class LayerScrollOffsetDelegateProxy;
  38 class LayerTreeDebugState;
  39 class LayerTreeHostImpl;
  40 class LayerTreeImpl;
  41 class LayerTreeSettings;
  42 class MemoryHistory;
  43 class OutputSurface;
  44 class PaintTimeCounter;
  45 class Proxy;
  46 class ResourceProvider;
  47 class TileManager;
  48 class UIResourceRequest;
  49 struct RendererCapabilities;
  50
  51 typedef std::list<UIResourceRequest> UIResourceRequestQueue;
  52
  53 class CC_EXPORT LayerTreeImpl {
  54  public:
  55   static scoped_ptr<LayerTreeImpl> create(
  56       LayerTreeHostImpl* layer_tree_host_impl) {
  57     return make_scoped_ptr(new LayerTreeImpl(layer_tree_host_impl));
  58   }
  59   virtual ~LayerTreeImpl();
  60
  61   void Shutdown();
  62
  63   // Methods called by the layer tree that pass-through or access LTHI.
  64   // ---------------------------------------------------------------------------
  65   const LayerTreeSettings& settings() const;
  66   const RendererCapabilitiesImpl& GetRendererCapabilities() const;
  67   ContextProvider* context_provider() const;
  68   OutputSurface* output_surface() const;
  69   ResourceProvider* resource_provider() const;
  70   TileManager* tile_manager() const;
  71   FrameRateCounter* frame_rate_counter() const;
  72   PaintTimeCounter* paint_time_counter() const;
  73   MemoryHistory* memory_history() const;
  74   bool device_viewport_valid_for_tile_management() const;
  75   bool IsActiveTree() const;
  76   bool IsPendingTree() const;
  77   bool IsRecycleTree() const;
  78   LayerImpl* FindActiveTreeLayerById(int id);
  79   LayerImpl* FindPendingTreeLayerById(int id);
  80   int MaxTextureSize() const;
  81   bool PinchGestureActive() const;
  82   base::TimeTicks CurrentFrameTimeTicks() const;
  83   void SetNeedsCommit();
  84   gfx::Size DrawViewportSize() const;
  85   void StartScrollbarAnimation();
  86   void DidAnimateScrollOffset();
  87
  88   // Tree specific methods exposed to layer-impl tree.
  89   // ---------------------------------------------------------------------------
  90   void SetNeedsRedraw();
  91
  92   // TODO(nduca): These are implemented in cc files temporarily, but will become
  93   // trivial accessors in a followup patch.
  94   const LayerTreeDebugState& debug_state() const;
  95   float device_scale_factor() const;
  96   DebugRectHistory* debug_rect_history() const;
  97   scoped_ptr<base::Value> AsValue() const;
  98
  99   // Other public methods
 100   // ---------------------------------------------------------------------------
 101   LayerImpl* root_layer() const { return root_layer_.get(); }
 102   void SetRootLayer(scoped_ptr<LayerImpl>);
 103   scoped_ptr<LayerImpl> DetachLayerTree();
 104
 105   void PushPropertiesTo(LayerTreeImpl* tree_impl);
 106
 107   int source_frame_number() const { return source_frame_number_; }
 108   void set_source_frame_number(int frame_number) {
 109     source_frame_number_ = frame_number;
 110   }
 111
 112   HeadsUpDisplayLayerImpl* hud_layer() { return hud_layer_; }
 113   void set_hud_layer(HeadsUpDisplayLayerImpl* layer_impl) {
 114     hud_layer_ = layer_impl;
 115   }
 116
 117   LayerImpl* InnerViewportScrollLayer() const;
 118   // This function may return NULL, it is the caller's responsibility to check.
 119   LayerImpl* OuterViewportScrollLayer() const;
 120   gfx::Vector2dF TotalScrollOffset() const;
 121   gfx::Vector2dF TotalMaxScrollOffset() const;
 122   gfx::Vector2dF TotalScrollDelta() const;
 123
 124   LayerImpl* InnerViewportContainerLayer() const;
 125   LayerImpl* CurrentlyScrollingLayer() const;
 126   void SetCurrentlyScrollingLayer(LayerImpl* layer);
 127   void ClearCurrentlyScrollingLayer();
 128   float VerticalAdjust(const int clip_layer_id) const;
 129
 130   void SetViewportLayersFromIds(int page_scale_layer_id,
 131                                 int inner_viewport_scroll_layer_id,
 132                                 int outer_viewport_scroll_layer_id);
 133   void ClearViewportLayers();
 134   LayerImpl* page_scale_layer() { return page_scale_layer_; }
 135   void ApplySentScrollAndScaleDeltasFromAbortedCommit();
 136   void ApplyScrollDeltasSinceBeginMainFrame();
 137
 138   SkColor background_color() const { return background_color_; }
 139   void set_background_color(SkColor color) { background_color_ = color; }
 140
 141   bool has_transparent_background() const {
 142     return has_transparent_background_;
 143   }
 144   void set_has_transparent_background(bool transparent) {
 145     has_transparent_background_ = transparent;
 146   }
 147
 148   void SetPageScaleFactorAndLimits(float page_scale_factor,
 149       float min_page_scale_factor, float max_page_scale_factor);
 150   void SetPageScaleDelta(float delta);
 151   float total_page_scale_factor() const {
 152     return page_scale_factor_ * page_scale_delta_;
 153   }
 154   float page_scale_factor() const { return page_scale_factor_; }
 155   float min_page_scale_factor() const { return min_page_scale_factor_; }
 156   float max_page_scale_factor() const { return max_page_scale_factor_; }
 157   float page_scale_delta() const  { return page_scale_delta_; }
 158   void set_sent_page_scale_delta(float delta) {
 159     sent_page_scale_delta_ = delta;
 160   }
 161   float sent_page_scale_delta() const { return sent_page_scale_delta_; }
 162
 163   // Updates draw properties and render surface layer list, as well as tile
 164   // priorities.
 165   void UpdateDrawProperties();
 166
 167   void set_needs_update_draw_properties() {
 168     needs_update_draw_properties_ = true;
 169   }
 170   bool needs_update_draw_properties() const {
 171     return needs_update_draw_properties_;
 172   }
 173
 174   void set_needs_full_tree_sync(bool needs) { needs_full_tree_sync_ = needs; }
 175   bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
 176
 177   void ForceRedrawNextActivation() { next_activation_forces_redraw_ = true; }
 178
 179   void set_ui_resource_request_queue(const UIResourceRequestQueue& queue);
 180
 181   const LayerImplList& RenderSurfaceLayerList() const;
 182
 183   // These return the size of the root scrollable area and the size of
 184   // the user-visible scrolling viewport, in CSS layout coordinates.
 185   gfx::Size ScrollableSize() const;
 186   gfx::SizeF ScrollableViewportSize() const;
 187
 188   gfx::Rect RootScrollLayerDeviceViewportBounds() const;
 189
 190   LayerImpl* LayerById(int id);
 191
 192   // These should be called by LayerImpl's ctor/dtor.
 193   void RegisterLayer(LayerImpl* layer);
 194   void UnregisterLayer(LayerImpl* layer);
 195
 196   AnimationRegistrar* animationRegistrar() const;
 197
 198   void PushPersistedState(LayerTreeImpl* pending_tree);
 199
 200   void DidBecomeActive();
 201
 202   bool ContentsTexturesPurged() const;
 203   void SetContentsTexturesPurged();
 204   void ResetContentsTexturesPurged();
 205
 206   void SetRequiresHighResToDraw();
 207   void ResetRequiresHighResToDraw();
 208   bool RequiresHighResToDraw() const;
 209
 210   // Set on the active tree when the viewport size recently changed
 211   // and the active tree's size is now out of date.
 212   bool ViewportSizeInvalid() const;
 213   void SetViewportSizeInvalid();
 214   void ResetViewportSizeInvalid();
 215
 216   // Useful for debug assertions, probably shouldn't be used for anything else.
 217   Proxy* proxy() const;
 218
 219   void SetRootLayerScrollOffsetDelegate(
 220       LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate);
 221   void UpdateScrollOffsetDelegate();
 222   gfx::Vector2dF GetDelegatedScrollOffset(LayerImpl* layer);
 223
 224   // Call this function when you expect there to be a swap buffer.
 225   // See swap_promise.h for how to use SwapPromise.
 226   void QueueSwapPromise(scoped_ptr<SwapPromise> swap_promise);
 227
 228   // Take the |new_swap_promise| and append it to |swap_promise_list_|.
 229   void PassSwapPromises(ScopedPtrVector<SwapPromise>* new_swap_promise);
 230   void FinishSwapPromises(CompositorFrameMetadata* metadata);
 231   void BreakSwapPromises(SwapPromise::DidNotSwapReason reason);
 232
 233   void DidModifyTilePriorities();
 234
 235   ResourceProvider::ResourceId ResourceIdForUIResource(UIResourceId uid) const;
 236   void ProcessUIResourceRequestQueue();
 237
 238   bool IsUIResourceOpaque(UIResourceId uid) const;
 239
 240   void AddLayerWithCopyOutputRequest(LayerImpl* layer);
 241   void RemoveLayerWithCopyOutputRequest(LayerImpl* layer);
 242   const std::vector<LayerImpl*>& LayersWithCopyOutputRequest() const;
 243
 244  protected:
 245   explicit LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl);
 246
 247   LayerTreeHostImpl* layer_tree_host_impl_;
 248   int source_frame_number_;
 249   scoped_ptr<LayerImpl> root_layer_;
 250   HeadsUpDisplayLayerImpl* hud_layer_;
 251   LayerImpl* currently_scrolling_layer_;
 252   LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate_;
 253   scoped_ptr<LayerScrollOffsetDelegateProxy>
 254       inner_viewport_scroll_delegate_proxy_;
 255   scoped_ptr<LayerScrollOffsetDelegateProxy>
 256       outer_viewport_scroll_delegate_proxy_;
 257   SkColor background_color_;
 258   bool has_transparent_background_;
 259
 260   LayerImpl* page_scale_layer_;
 261   LayerImpl* inner_viewport_scroll_layer_;
 262   LayerImpl* outer_viewport_scroll_layer_;
 263
 264   float page_scale_factor_;
 265   float page_scale_delta_;
 266   float sent_page_scale_delta_;
 267   float min_page_scale_factor_;
 268   float max_page_scale_factor_;
 269
 270   typedef base::hash_map<int, LayerImpl*> LayerIdMap;
 271   LayerIdMap layer_id_map_;
 272
 273   std::vector<LayerImpl*> layers_with_copy_output_request_;
 274
 275   // Persisted state for non-impl-side-painting.
 276   int scrolling_layer_id_from_previous_tree_;
 277
 278   // List of visible or hit-testable layers for the most recently prepared
 279   // frame. Used for rendering and input event hit testing.
 280   LayerImplList render_surface_layer_list_;
 281
 282   bool contents_textures_purged_;
 283   bool requires_high_res_to_draw_;
 284   bool viewport_size_invalid_;
 285   bool needs_update_draw_properties_;
 286
 287   // In impl-side painting mode, this is true when the tree may contain
 288   // structural differences relative to the active tree.
 289   bool needs_full_tree_sync_;
 290
 291   bool next_activation_forces_redraw_;
 292
 293   ScopedPtrVector<SwapPromise> swap_promise_list_;
 294
 295   UIResourceRequestQueue ui_resource_request_queue_;
 296
 297  private:
 298   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 299 };
 300
 301 }  // namespace cc
 302
 303 #endif  // CC_TREES_LAYER_TREE_IMPL_H_