cc: Merge LayerTree into the LayerTreeHost.

cc/trees/layer_tree_host.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 18 matching lines @@
 #include "cc/input/layer_selection_bound.h"
 #include "cc/input/scrollbar.h"
 #include "cc/layers/layer_collections.h"
 #include "cc/layers/layer_list_iterator.h"
 #include "cc/output/compositor_frame_sink.h"
 #include "cc/output/swap_promise.h"
 #include "cc/resources/resource_format.h"
 #include "cc/surfaces/surface_reference_owner.h"
 #include "cc/surfaces/surface_sequence_generator.h"
 #include "cc/trees/compositor_mode.h"
-#include "cc/trees/layer_tree.h"
 #include "cc/trees/layer_tree_host_client.h"
 #include "cc/trees/layer_tree_settings.h"
+#include "cc/trees/mutator_host.h"
 #include "cc/trees/proxy.h"
 #include "cc/trees/swap_promise_manager.h"
 #include "cc/trees/target_property.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace cc {
-class MutatorEvents;
+class HeadsUpDisplayLayer;
 class Layer;
 class LayerTreeHostClient;
 class LayerTreeHostImpl;
 class LayerTreeHostImplClient;
 class LayerTreeHostSingleThreadClient;
 class LayerTreeMutator;
+class MutatorEvents;
 class MutatorHost;
+struct PendingPageScaleAnimation;
 class RenderingStatsInstrumentation;
 class TaskGraphRunner;
 class UIResourceManager;
 struct RenderingStats;
 struct ScrollAndScaleSet;
 
-class CC_EXPORT LayerTreeHost
-    : public NON_EXPORTED_BASE(SurfaceReferenceOwner) {
+class CC_EXPORT LayerTreeHost : public NON_EXPORTED_BASE(SurfaceReferenceOwner),
+                                public NON_EXPORTED_BASE(MutatorHostClient) {
  public:
   // TODO(sad): InitParams should be a movable type so that it can be
   // std::move()d to the Create* functions.
   struct CC_EXPORT InitParams {
     LayerTreeHostClient* client = nullptr;
     TaskGraphRunner* task_graph_runner = nullptr;
     LayerTreeSettings const* settings = nullptr;
     scoped_refptr<base::SingleThreadTaskRunner> main_task_runner;
     MutatorHost* mutator_host = nullptr;
     scoped_refptr<base::SequencedTaskRunner> image_worker_task_runner;
 
     InitParams();
     ~InitParams();
   };
 
+  using LayerSet = std::unordered_set<Layer*>;

[danakj, 2017/01/27 17:25:09]

These types don't seem onerous to type out, can we drop the aliases?

[Khushal, 2017/01/27 18:52:19]

There is the place where we use the iterator and it looks unwieldy to write the
whole thing there. Dropped the set and made the map private.

[danakj, 2017/01/27 19:07:08]

That should use auto :)

[Khushal, 2017/01/27 19:24:40]

Doh. Done. :P

+  using LayerIdMap = std::unordered_map<int, Layer*>;
+
   static std::unique_ptr<LayerTreeHost> CreateThreaded(
       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
       InitParams* params);
 
   static std::unique_ptr<LayerTreeHost> CreateSingleThreaded(
       LayerTreeHostSingleThreadClient* single_thread_client,
       InitParams* params);
 
   ~LayerTreeHost() override;
 
   // Returns the process global unique identifier for this LayerTreeHost.
   int GetId() const;
 
   // The current source frame number. This is incremented for each main frame
   // update(commit) pushed to the compositor thread.
   int SourceFrameNumber() const;
 
-  // Returns the LayerTree that holds the main frame state pushed to the
-  // LayerTreeImpl on commit.
-  LayerTree* GetLayerTree();
-  const LayerTree* GetLayerTree() const;
-
   // Returns the UIResourceManager used to create UIResources for
   // UIResourceLayers pushed to the LayerTree.
   UIResourceManager* GetUIResourceManager() const;
 
   // Returns the TaskRunnerProvider used to access the main and compositor
   // thread task runners.
   TaskRunnerProvider* GetTaskRunnerProvider() const;
 
   // Returns the settings used by this host.
   const LayerTreeSettings& GetSettings() const;
@@ skipping 116 matching lines @@
   // When the main thread informs the impl thread that it is ready to commit,
   // generally it would remain blocked till the main thread state is copied to
   // the pending tree. Calling this would ensure that the main thread remains
   // blocked till the pending tree is activated.
   void SetNextCommitWaitsForActivation();
 
   // The LayerTreeHost tracks whether the content is suitable for Gpu raster.
   // Calling this will reset it back to not suitable state.
   void ResetGpuRasterizationTracking();
 
-  // SurfaceReferenceOwner implementation.
-  SurfaceSequenceGenerator* GetSurfaceSequenceGenerator() override;
+  void SetRootLayer(scoped_refptr<Layer> root_layer);
+  Layer* root_layer() { return root_layer_.get(); }
+  const Layer* root_layer() const { return root_layer_.get(); }
+
+  void RegisterViewportLayers(scoped_refptr<Layer> overscroll_elasticity_layer,
+                              scoped_refptr<Layer> page_scale_layer,
+                              scoped_refptr<Layer> inner_viewport_scroll_layer,
+                              scoped_refptr<Layer> outer_viewport_scroll_layer);
+
+  Layer* overscroll_elasticity_layer() const {
+    return overscroll_elasticity_layer_.get();
+  }
+  Layer* page_scale_layer() const { return page_scale_layer_.get(); }
+  Layer* inner_viewport_scroll_layer() const {
+    return inner_viewport_scroll_layer_.get();
+  }
+  Layer* outer_viewport_scroll_layer() const {
+    return outer_viewport_scroll_layer_.get();
+  }
+
+  void RegisterSelection(const LayerSelection& selection);
+  const LayerSelection& selection() const { return selection_; }
+
+  void SetHaveScrollEventHandlers(bool have_event_handlers);
+  bool have_scroll_event_handlers() const {
+    return have_scroll_event_handlers_;
+  }
+
+  void SetEventListenerProperties(EventListenerClass event_class,
+                                  EventListenerProperties event_properties);
+  EventListenerProperties event_listener_properties(
+      EventListenerClass event_class) const {
+    return event_listener_properties_[static_cast<size_t>(event_class)];
+  }
+
+  void SetViewportSize(const gfx::Size& device_viewport_size);
+  gfx::Size device_viewport_size() const { return device_viewport_size_; }
+
+  void SetBrowserControlsHeight(float height, bool shrink);
+  void SetBrowserControlsShownRatio(float ratio);
+  void SetBottomControlsHeight(float height);
+
+  void SetPageScaleFactorAndLimits(float page_scale_factor,
+                                   float min_page_scale_factor,
+                                   float max_page_scale_factor);
+  float page_scale_factor() const { return page_scale_factor_; }
+  float min_page_scale_factor() const { return min_page_scale_factor_; }
+  float max_page_scale_factor() const { return max_page_scale_factor_; }
+
+  void set_background_color(SkColor color) { background_color_ = color; }
+  SkColor background_color() const { return background_color_; }
+
+  void set_has_transparent_background(bool transparent) {
+    has_transparent_background_ = transparent;
+  }
+  bool has_transparent_background() const {
+    return has_transparent_background_;
+  }
+
+  void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
+                               bool use_anchor,
+                               float scale,
+                               base::TimeDelta duration);
+  bool HasPendingPageScaleAnimation() const;
+
+  void SetDeviceScaleFactor(float device_scale_factor);
+  float device_scale_factor() const { return device_scale_factor_; }
+
+  void SetPaintedDeviceScaleFactor(float painted_device_scale_factor);
+  float painted_device_scale_factor() const {
+    return painted_device_scale_factor_;
+  }
+
+  void SetDeviceColorSpace(const gfx::ColorSpace& device_color_space);
+  const gfx::ColorSpace& device_color_space() const {
+    return device_color_space_;
+  }
+
+  // Used externally by blink for setting the PropertyTrees when
+  // |settings_.use_layer_lists| is true. This is a SPV2 setting.
+  PropertyTrees* property_trees() { return &property_trees_; }
+
+  void SetNeedsDisplayOnAllLayers();
+
+  void RegisterLayer(Layer* layer);
+  void UnregisterLayer(Layer* layer);
+  Layer* LayerById(int id) const;
+
+  size_t NumLayers() const;
+
+  bool UpdateLayers(const LayerList& update_layer_list,
+                    bool* content_is_suitable_for_gpu);
+  bool in_paint_layer_contents() const { return in_paint_layer_contents_; }
+
+  void AddLayerShouldPushProperties(Layer* layer);
+  void RemoveLayerShouldPushProperties(Layer* layer);
+  std::unordered_set<Layer*>& LayersThatShouldPushProperties();
+  bool LayerNeedsPushPropertiesForTesting(Layer* layer) const;
+
+  virtual void SetNeedsMetaInfoRecomputation(
+      bool needs_meta_info_recomputation);
+  bool needs_meta_info_recomputation() const {
+    return needs_meta_info_recomputation_;
+  }
+
+  void SetPageScaleFromImplSide(float page_scale);
+  void SetElasticOverscrollFromImplSide(gfx::Vector2dF elastic_overscroll);
+  gfx::Vector2dF elastic_overscroll() const { return elastic_overscroll_; }
+
+  void UpdateHudLayer(bool show_hud_info);
+  HeadsUpDisplayLayer* hud_layer() const { return hud_layer_.get(); }
+
+  virtual void SetNeedsFullTreeSync();
+  bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
+
+  void SetPropertyTreesNeedRebuild();
+
+  void PushPropertiesTo(LayerTreeImpl* tree_impl);
+
+  MutatorHost* mutator_host() const { return mutator_host_; }
+
+  Layer* LayerByElementId(ElementId element_id) const;
+  void RegisterElement(ElementId element_id,
+                       ElementListType list_type,
+                       Layer* layer);
+  void UnregisterElement(ElementId element_id,
+                         ElementListType list_type,
+                         Layer* layer);
+  void SetElementIdsForTesting();
+
+  void BuildPropertyTreesForTesting();
+
+  // Layer iterators.
+  LayerListIterator<Layer> begin() const;
+  LayerListIterator<Layer> end() const;
+  LayerListReverseIterator<Layer> rbegin();
+  LayerListReverseIterator<Layer> rend();
 
   // LayerTreeHostInProcess interface to Proxy.
   void WillBeginMainFrame();
   void DidBeginMainFrame();
   void BeginMainFrame(const BeginFrameArgs& args);
   void BeginMainFrameNotExpectedSoon();
   void AnimateLayers(base::TimeTicks monotonic_frame_begin_time);
   void RequestMainFrameUpdate();
   void FinishCommitOnImplThread(LayerTreeHostImpl* host_impl);
   void WillCommit();
@@ skipping 29 matching lines @@
 
   bool has_gpu_rasterization_trigger() const {
     return has_gpu_rasterization_trigger_;
   }
 
   Proxy* proxy() const { return proxy_.get(); }
 
   bool IsSingleThreaded() const;
   bool IsThreaded() const;
 
+  // SurfaceReferenceOwner implementation.
+  SurfaceSequenceGenerator* GetSurfaceSequenceGenerator() override;
+
+  // MutatorHostClient implementation.
+  bool IsElementInList(ElementId element_id,
+                       ElementListType list_type) const override;
+  void SetMutatorsNeedCommit() override;
+  void SetMutatorsNeedRebuildPropertyTrees() override;
+  void SetElementFilterMutated(ElementId element_id,
+                               ElementListType list_type,
+                               const FilterOperations& filters) override;
+  void SetElementOpacityMutated(ElementId element_id,
+                                ElementListType list_type,
+                                float opacity) override;
+  void SetElementTransformMutated(ElementId element_id,
+                                  ElementListType list_type,
+                                  const gfx::Transform& transform) override;
+  void SetElementScrollOffsetMutated(
+      ElementId element_id,
+      ElementListType list_type,
+      const gfx::ScrollOffset& scroll_offset) override;
+
+  void ElementIsAnimatingChanged(ElementId element_id,
+                                 ElementListType list_type,
+                                 const PropertyAnimationState& mask,
+                                 const PropertyAnimationState& state) override;
+
+  void ScrollOffsetAnimationFinished() override {}
+  gfx::ScrollOffset GetScrollOffsetForAnimation(
+      ElementId element_id) const override;
+
  protected:
-  // Allow tests to inject the LayerTree.
-  LayerTreeHost(InitParams* params,
-                CompositorMode mode,
-                std::unique_ptr<LayerTree> layer_tree);
   LayerTreeHost(InitParams* params, CompositorMode mode);
 
   void InitializeThreaded(
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner);
   void InitializeSingleThreaded(
       LayerTreeHostSingleThreadClient* single_thread_client,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner);
   void InitializeForTesting(
       std::unique_ptr<TaskRunnerProvider> task_runner_provider,
       std::unique_ptr<Proxy> proxy_for_testing);
   void SetTaskRunnerProviderForTesting(
       std::unique_ptr<TaskRunnerProvider> task_runner_provider);
   void SetUIResourceManagerForTesting(
       std::unique_ptr<UIResourceManager> ui_resource_manager);
 
   // task_graph_runner() returns a valid value only until the LayerTreeHostImpl
   // is created in CreateLayerTreeHostImpl().
   TaskGraphRunner* task_graph_runner() const { return task_graph_runner_; }
 
   void OnCommitForSwapPromises();
 
   void RecordGpuRasterizationHistogram();
 
   MicroBenchmarkController micro_benchmark_controller_;
 
-  std::unique_ptr<LayerTree> layer_tree_;
-
   base::WeakPtr<InputHandler> input_handler_weak_ptr_;
 
  private:
   friend class LayerTreeHostSerializationTest;
 
   // This is the number of consecutive frames in which we want the content to be
   // suitable for GPU rasterization before re-enabling it.
   enum { kNumFramesToConsiderBeforeGpuRasterization = 60 };
 
   void ApplyViewportDeltas(ScrollAndScaleSet* info);
   void ApplyPageScaleDeltaFromImplSide(float page_scale_delta);
   void InitializeProxy(std::unique_ptr<Proxy> proxy);
 
   bool DoUpdateLayers(Layer* root_layer);
   void UpdateHudLayer();
 
   bool AnimateLayersRecursive(Layer* current, base::TimeTicks time);
 
   void CalculateLCDTextMetricsCallback(Layer* layer);
 
-  void SetPropertyTreesNeedRebuild();
-
   const CompositorMode compositor_mode_;
 
   std::unique_ptr<UIResourceManager> ui_resource_manager_;
 
   LayerTreeHostClient* client_;
   std::unique_ptr<Proxy> proxy_;
   std::unique_ptr<TaskRunnerProvider> task_runner_provider_;
 
-  int source_frame_number_;
+  int source_frame_number_ = 0U;

[danakj, 2017/01/27 17:25:09]

 = 0 (its signed int)

[Khushal, 2017/01/27 18:52:19]

Done.

   std::unique_ptr<RenderingStatsInstrumentation>
       rendering_stats_instrumentation_;
 
   SwapPromiseManager swap_promise_manager_;
 
   // |current_compositor_frame_sink_| can't be updated until we've successfully
   // initialized a new CompositorFrameSink. |new_compositor_frame_sink_|
   // contains the new CompositorFrameSink that is currently being initialized.
   // If initialization is successful then |new_compositor_frame_sink_| replaces
   // |current_compositor_frame_sink_|.
   std::unique_ptr<CompositorFrameSink> new_compositor_frame_sink_;
   std::unique_ptr<CompositorFrameSink> current_compositor_frame_sink_;
 
   const LayerTreeSettings settings_;
   LayerTreeDebugState debug_state_;
 
-  bool visible_;
+  bool visible_ = false;
 
-  bool has_gpu_rasterization_trigger_;
-  bool content_is_suitable_for_gpu_rasterization_;
-  bool gpu_rasterization_histogram_recorded_;
+  bool has_gpu_rasterization_trigger_ = false;
+  bool content_is_suitable_for_gpu_rasterization_ = true;
+  bool gpu_rasterization_histogram_recorded_ = false;
 
   // If set, then page scale animation has completed, but the client hasn't been
   // notified about it yet.
-  bool did_complete_scale_animation_;
+  bool did_complete_scale_animation_ = false;
 
   int id_;
   bool next_commit_forces_redraw_ = false;
   bool next_commit_forces_recalculate_raster_scales_ = false;
   // Track when we're inside a main frame to see if compositor is being
   // destroyed midway which causes a crash. crbug.com/654672
   bool inside_main_frame_ = false;
 
   TaskGraphRunner* task_graph_runner_;
 
   SurfaceSequenceGenerator surface_sequence_generator_;
   uint32_t num_consecutive_frames_suitable_for_gpu_ = 0;
 
+  scoped_refptr<Layer> root_layer_;
+
+  scoped_refptr<Layer> overscroll_elasticity_layer_;
+  scoped_refptr<Layer> page_scale_layer_;
+  scoped_refptr<Layer> inner_viewport_scroll_layer_;
+  scoped_refptr<Layer> outer_viewport_scroll_layer_;
+
+  float top_controls_height_ = 0.f;
+  float top_controls_shown_ratio_ = 0.f;
+  bool browser_controls_shrink_blink_size_ = false;
+
+  float bottom_controls_height_ = 0.f;
+
+  float device_scale_factor_ = 1.f;
+  float painted_device_scale_factor_ = 1.f;
+  float page_scale_factor_ = 1.f;
+  float min_page_scale_factor_ = 1.f;
+  float max_page_scale_factor_ = 1.f;
+  gfx::ColorSpace device_color_space_;
+
+  SkColor background_color_ = SK_ColorWHITE;
+  bool has_transparent_background_ = false;
+
+  LayerSelection selection_;
+
+  gfx::Size device_viewport_size_;
+
+  bool have_scroll_event_handlers_ = false;
+  EventListenerProperties event_listener_properties_[static_cast<size_t>(
+      EventListenerClass::kNumClasses)];
+
+  std::unique_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
+
+  PropertyTrees property_trees_;
+
+  bool needs_full_tree_sync_ = true;
+  bool needs_meta_info_recomputation_ = true;
+
+  gfx::Vector2dF elastic_overscroll_;
+
+  scoped_refptr<HeadsUpDisplayLayer> hud_layer_;
+
+  // Set of layers that need to push properties.
+  LayerSet layers_that_should_push_properties_;
+
+  // Layer id to Layer map.
+  LayerIdMap layer_id_map_;
+
+  using ElementLayersMap = std::unordered_map<ElementId, Layer*, ElementIdHash>;

[danakj, 2017/01/27 17:25:09]

same here

[Khushal, 2017/01/27 18:52:19]

same as LayerIdMap.

+  ElementLayersMap element_layers_map_;
+
+  bool in_paint_layer_contents_ = false;
+
+  MutatorHost* mutator_host_;
+
   scoped_refptr<base::SequencedTaskRunner> image_worker_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_