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   base::Time CurrentFrameTime() const;
  84   base::TimeTicks CurrentPhysicalTimeTicks() const;
  85   void SetNeedsCommit();
  86   gfx::Size DrawViewportSize() const;
  87   void StartScrollbarAnimation();
  88   void DidAnimateScrollOffset();
  89
  90   // Tree specific methods exposed to layer-impl tree.
  91   // ---------------------------------------------------------------------------
  92   void SetNeedsRedraw();
  93
  94   // TODO(nduca): These are implemented in cc files temporarily, but will become
  95   // trivial accessors in a followup patch.
  96   const LayerTreeDebugState& debug_state() const;
  97   float device_scale_factor() const;
  98   DebugRectHistory* debug_rect_history() const;
  99   scoped_ptr<base::Value> AsValue() const;
 100
 101   // Other public methods
 102   // ---------------------------------------------------------------------------
 103   LayerImpl* root_layer() const { return root_layer_.get(); }
 104   void SetRootLayer(scoped_ptr<LayerImpl>);
 105   scoped_ptr<LayerImpl> DetachLayerTree();
 106
 107   void PushPropertiesTo(LayerTreeImpl* tree_impl);
 108
 109   int source_frame_number() const { return source_frame_number_; }
 110   void set_source_frame_number(int frame_number) {
 111     source_frame_number_ = frame_number;
 112   }
 113
 114   HeadsUpDisplayLayerImpl* hud_layer() { return hud_layer_; }
 115   void set_hud_layer(HeadsUpDisplayLayerImpl* layer_impl) {
 116     hud_layer_ = layer_impl;
 117   }
 118
 119   LayerImpl* InnerViewportScrollLayer() const;
 120   // This function may return NULL, it is the caller's responsibility to check.
 121   LayerImpl* OuterViewportScrollLayer() const;
 122   gfx::Vector2dF TotalScrollOffset() const;
 123   gfx::Vector2dF TotalMaxScrollOffset() const;
 124   gfx::Vector2dF TotalScrollDelta() const;
 125
 126   LayerImpl* RootContainerLayer() const;
 127   LayerImpl* CurrentlyScrollingLayer() const;
 128   void SetCurrentlyScrollingLayer(LayerImpl* layer);
 129   void ClearCurrentlyScrollingLayer();
 130   float VerticalAdjust(const LayerImpl* layer) const;
 131
 132   void SetViewportLayersFromIds(int page_scale_layer_id,
 133                                 int inner_viewport_scroll_layer_id,
 134                                 int outer_viewport_scroll_layer_id);
 135   void ClearViewportLayers();
 136   LayerImpl* page_scale_layer() { return page_scale_layer_; }
 137   void ApplySentScrollAndScaleDeltasFromAbortedCommit();
 138   void ApplyScrollDeltasSinceBeginMainFrame();
 139
 140   SkColor background_color() const { return background_color_; }
 141   void set_background_color(SkColor color) { background_color_ = color; }
 142
 143   bool has_transparent_background() const {
 144     return has_transparent_background_;
 145   }
 146   void set_has_transparent_background(bool transparent) {
 147     has_transparent_background_ = transparent;
 148   }
 149
 150   void SetPageScaleFactorAndLimits(float page_scale_factor,
 151       float min_page_scale_factor, float max_page_scale_factor);
 152   void SetPageScaleDelta(float delta);
 153   float total_page_scale_factor() const {
 154     return page_scale_factor_ * page_scale_delta_;
 155   }
 156   float page_scale_factor() const { return page_scale_factor_; }
 157   float min_page_scale_factor() const { return min_page_scale_factor_; }
 158   float max_page_scale_factor() const { return max_page_scale_factor_; }
 159   float page_scale_delta() const  { return page_scale_delta_; }
 160   void set_sent_page_scale_delta(float delta) {
 161     sent_page_scale_delta_ = delta;
 162   }
 163   float sent_page_scale_delta() const { return sent_page_scale_delta_; }
 164
 165   // Updates draw properties and render surface layer list, as well as tile
 166   // priorities.
 167   void UpdateDrawProperties();
 168
 169   void set_needs_update_draw_properties() {
 170     needs_update_draw_properties_ = true;
 171   }
 172   bool needs_update_draw_properties() const {
 173     return needs_update_draw_properties_;
 174   }
 175
 176   void set_needs_full_tree_sync(bool needs) { needs_full_tree_sync_ = needs; }
 177   bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
 178
 179   void ForceRedrawNextActivation() { next_activation_forces_redraw_ = true; }
 180
 181   void set_ui_resource_request_queue(const UIResourceRequestQueue& queue);
 182
 183   const LayerImplList& RenderSurfaceLayerList() const;
 184
 185   // These return the size of the root scrollable area and the size of
 186   // the user-visible scrolling viewport, in CSS layout coordinates.
 187   gfx::Size ScrollableSize() const;
 188   gfx::SizeF ScrollableViewportSize() const;
 189
 190   gfx::Rect RootScrollLayerDeviceViewportBounds() const;
 191
 192   LayerImpl* LayerById(int id);
 193
 194   // These should be called by LayerImpl's ctor/dtor.
 195   void RegisterLayer(LayerImpl* layer);
 196   void UnregisterLayer(LayerImpl* layer);
 197
 198   AnimationRegistrar* animationRegistrar() const;
 199
 200   void PushPersistedState(LayerTreeImpl* pending_tree);
 201
 202   void DidBecomeActive();
 203
 204   bool ContentsTexturesPurged() const;
 205   void SetContentsTexturesPurged();
 206   void ResetContentsTexturesPurged();
 207
 208   void SetRequiresHighResToDraw();
 209   void ResetRequiresHighResToDraw();
 210   bool RequiresHighResToDraw() const;
 211
 212   // Set on the active tree when the viewport size recently changed
 213   // and the active tree's size is now out of date.
 214   bool ViewportSizeInvalid() const;
 215   void SetViewportSizeInvalid();
 216   void ResetViewportSizeInvalid();
 217
 218   // Useful for debug assertions, probably shouldn't be used for anything else.
 219   Proxy* proxy() const;
 220
 221   void SetRootLayerScrollOffsetDelegate(
 222       LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate);
 223   void UpdateScrollOffsetDelegate();
 224   gfx::Vector2dF GetDelegatedScrollOffset(LayerImpl* layer);
 225
 226   // Call this function when you expect there to be a swap buffer.
 227   // See swap_promise.h for how to use SwapPromise.
 228   void QueueSwapPromise(scoped_ptr<SwapPromise> swap_promise);
 229
 230   // Take the |new_swap_promise| and append it to |swap_promise_list_|.
 231   void PassSwapPromises(ScopedPtrVector<SwapPromise>* new_swap_promise);
 232   void FinishSwapPromises(CompositorFrameMetadata* metadata);
 233   void BreakSwapPromises(SwapPromise::DidNotSwapReason reason);
 234
 235   void DidModifyTilePriorities();
 236
 237   ResourceProvider::ResourceId ResourceIdForUIResource(UIResourceId uid) const;
 238   void ProcessUIResourceRequestQueue();
 239
 240   bool IsUIResourceOpaque(UIResourceId uid) const;
 241
 242   void AddLayerWithCopyOutputRequest(LayerImpl* layer);
 243   void RemoveLayerWithCopyOutputRequest(LayerImpl* layer);
 244   const std::vector<LayerImpl*>& LayersWithCopyOutputRequest() const;
 245
 246  protected:
 247   explicit LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl);
 248
 249   void UpdateRootScrollLayerSizeDelta();
 250
 251   LayerTreeHostImpl* layer_tree_host_impl_;
 252   int source_frame_number_;
 253   scoped_ptr<LayerImpl> root_layer_;
 254   HeadsUpDisplayLayerImpl* hud_layer_;
 255   LayerImpl* currently_scrolling_layer_;
 256   LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate_;
 257   scoped_ptr<LayerScrollOffsetDelegateProxy>
 258       inner_viewport_scroll_delegate_proxy_;
 259   scoped_ptr<LayerScrollOffsetDelegateProxy>
 260       outer_viewport_scroll_delegate_proxy_;
 261   SkColor background_color_;
 262   bool has_transparent_background_;
 263
 264   LayerImpl* page_scale_layer_;
 265   LayerImpl* inner_viewport_scroll_layer_;
 266   LayerImpl* outer_viewport_scroll_layer_;
 267
 268   float page_scale_factor_;
 269   float page_scale_delta_;
 270   float sent_page_scale_delta_;
 271   float min_page_scale_factor_;
 272   float max_page_scale_factor_;
 273
 274   typedef base::hash_map<int, LayerImpl*> LayerIdMap;
 275   LayerIdMap layer_id_map_;
 276
 277   std::vector<LayerImpl*> layers_with_copy_output_request_;
 278
 279   // Persisted state for non-impl-side-painting.
 280   int scrolling_layer_id_from_previous_tree_;
 281
 282   // List of visible or hit-testable layers for the most recently prepared
 283   // frame. Used for rendering and input event hit testing.
 284   LayerImplList render_surface_layer_list_;
 285
 286   bool contents_textures_purged_;
 287   bool requires_high_res_to_draw_;
 288   bool viewport_size_invalid_;
 289   bool needs_update_draw_properties_;
 290
 291   // In impl-side painting mode, this is true when the tree may contain
 292   // structural differences relative to the active tree.
 293   bool needs_full_tree_sync_;
 294
 295   bool next_activation_forces_redraw_;
 296
 297   ScopedPtrVector<SwapPromise> swap_promise_list_;
 298
 299   UIResourceRequestQueue ui_resource_request_queue_;
 300
 301  private:
 302   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 303 };
 304
 305 }  // namespace cc
 306
 307 #endif  // CC_TREES_LAYER_TREE_IMPL_H_