Part 10 of cc/ directory shuffles: layers

cc/layer_impl.h

Index: cc/layer_impl.h
diff --git a/cc/layer_impl.h b/cc/layer_impl.h
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-// 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_LAYER_IMPL_H_
-#define CC_LAYER_IMPL_H_
-
-#include <string>
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/values.h"
-#include "cc/animation/layer_animation_controller.h"
-#include "cc/animation/layer_animation_value_observer.h"
-#include "cc/base/cc_export.h"
-#include "cc/base/region.h"
-#include "cc/base/scoped_ptr_vector.h"
-#include "cc/draw_properties.h"
-#include "cc/input/input_handler.h"
-#include "cc/quads/render_pass.h"
-#include "cc/quads/shared_quad_state.h"
-#include "cc/render_surface_impl.h"
-#include "cc/resources/resource_provider.h"
-#include "skia/ext/refptr.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperations.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "third_party/skia/include/core/SkImageFilter.h"
-#include "third_party/skia/include/core/SkPicture.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/rect_f.h"
-#include "ui/gfx/transform.h"
-
-namespace base {
-class DictionaryValue;
-}
-
-namespace cc {
-
-class LayerTreeHostImpl;
-class LayerTreeImpl;
-class QuadSink;
-class Renderer;
-class ScrollbarAnimationController;
-class ScrollbarLayerImpl;
-class Layer;
-
-struct AppendQuadsData;
-
-class CC_EXPORT LayerImpl : LayerAnimationValueObserver {
- public:
-  typedef ScopedPtrVector<LayerImpl> LayerList;
-
-  static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
-    return make_scoped_ptr(new LayerImpl(tree_impl, id));
-  }
-
-  virtual ~LayerImpl();
-
-  int id() const { return layer_id_; }
-
-  // LayerAnimationValueObserver implementation.
-  virtual void OnOpacityAnimated(float opacity) OVERRIDE;
-  virtual void OnTransformAnimated(const gfx::Transform& transform) OVERRIDE;
-  virtual bool IsActive() const OVERRIDE;
-
-  // Tree structure.
-  LayerImpl* parent() { return parent_; }
-  const LayerImpl* parent() const { return parent_; }
-  const LayerList& children() const { return children_; }
-  LayerList& children() { return children_; }
-  LayerImpl* child_at(size_t index) const { return children_[index]; }
-  void AddChild(scoped_ptr<LayerImpl> child);
-  scoped_ptr<LayerImpl> RemoveChild(LayerImpl* child);
-  void set_parent(LayerImpl* parent) { parent_ = parent; }
-  // Warning: This does not preserve tree structure invariants.
-  void ClearChildList();
-
-  void SetMaskLayer(scoped_ptr<LayerImpl> mask_layer);
-  LayerImpl* mask_layer() { return mask_layer_.get(); }
-  const LayerImpl* mask_layer() const { return mask_layer_.get(); }
-  scoped_ptr<LayerImpl> TakeMaskLayer();
-
-  void SetReplicaLayer(scoped_ptr<LayerImpl> replica_layer);
-  LayerImpl* replica_layer() { return replica_layer_.get(); }
-  const LayerImpl* replica_layer() const { return replica_layer_.get(); }
-  scoped_ptr<LayerImpl> TakeReplicaLayer();
-
-  bool has_mask() const { return mask_layer_; }
-  bool has_replica() const { return replica_layer_; }
-  bool replica_has_mask() const {
-    return replica_layer_ && (mask_layer_ || replica_layer_->mask_layer_);
-  }
-
-  LayerTreeImpl* layer_tree_impl() const { return layer_tree_impl_; }
-
-  scoped_ptr<SharedQuadState> CreateSharedQuadState() const;
-  // willDraw must be called before appendQuads. If willDraw is called,
-  // didDraw is guaranteed to be called before another willDraw or before
-  // the layer is destroyed. To enforce this, any class that overrides
-  // willDraw/didDraw must call the base class version.
-  virtual void WillDraw(ResourceProvider* resource_provider);
-  virtual void AppendQuads(QuadSink* quad_sink,
-                           AppendQuadsData* append_quads_data) {}
-  virtual void DidDraw(ResourceProvider* resource_provider);
-
-  virtual ResourceProvider::ResourceId ContentsResourceId() const;
-
-  virtual bool HasDelegatedContent() const;
-  virtual bool HasContributingDelegatedRenderPasses() const;
-  virtual RenderPass::Id FirstContributingRenderPassId() const;
-  virtual RenderPass::Id NextContributingRenderPassId(RenderPass::Id id) const;
-
-  virtual void UpdateTilePriorities() {}
-
-  virtual ScrollbarLayerImpl* ToScrollbarLayer();
-
-  // Returns true if this layer has content to draw.
-  void SetDrawsContent(bool draws_content);
-  bool DrawsContent() const { return draws_content_; }
-
-  bool force_render_surface() const { return force_render_surface_; }
-  void SetForceRenderSurface(bool force) { force_render_surface_ = force; }
-
-  void SetAnchorPoint(gfx::PointF anchor_point);
-  gfx::PointF anchor_point() const { return anchor_point_; }
-
-  void SetAnchorPointZ(float anchor_point_z);
-  float anchor_point_z() const { return anchor_point_z_; }
-
-  void SetBackgroundColor(SkColor background_color);
-  SkColor background_color() const { return background_color_; }
-
-  void SetFilters(const WebKit::WebFilterOperations& filters);
-  const WebKit::WebFilterOperations& filters() const { return filters_; }
-
-  void SetBackgroundFilters(const WebKit::WebFilterOperations& filters);
-  const WebKit::WebFilterOperations& background_filters() const {
-    return background_filters_;
-  }
-
-  void SetFilter(const skia::RefPtr<SkImageFilter>& filter);
-  skia::RefPtr<SkImageFilter> filter() const { return filter_; }
-
-  void SetMasksToBounds(bool masks_to_bounds);
-  bool masks_to_bounds() const { return masks_to_bounds_; }
-
-  void SetContentsOpaque(bool opaque);
-  bool contents_opaque() const { return contents_opaque_; }
-
-  void SetOpacity(float opacity);
-  float opacity() const { return opacity_; }
-  bool OpacityIsAnimating() const;
-  bool OpacityIsAnimatingOnImplOnly() const;
-
-  void SetPosition(gfx::PointF position);
-  gfx::PointF position() const { return position_; }
-
-  void SetIsContainerForFixedPositionLayers(bool container) {
-    is_container_for_fixed_position_layers_ = container;
-  }
-  bool is_container_for_fixed_position_layers() const {
-    return is_container_for_fixed_position_layers_;
-  }
-
-  void SetFixedToContainerLayer(bool fixed) {
-    fixed_to_container_layer_ = fixed;
-  }
-  bool fixed_to_container_layer() const { return fixed_to_container_layer_; }
-
-  void SetPreserves3d(bool preserves_3d);
-  bool preserves_3d() const { return preserves_3d_; }
-
-  void SetUseParentBackfaceVisibility(bool use) {
-    use_parent_backface_visibility_ = use;
-  }
-  bool use_parent_backface_visibility() const {
-    return use_parent_backface_visibility_;
-  }
-
-  void SetSublayerTransform(const gfx::Transform& sublayer_transform);
-  const gfx::Transform& sublayer_transform() const {
-    return sublayer_transform_;
-  }
-
-  // Debug layer name.
-  void SetDebugName(const std::string& debug_name) { debug_name_ = debug_name; }
-  std::string debug_name() const { return debug_name_; }
-
-  bool ShowDebugBorders() const;
-
-  // These invalidate the host's render surface layer list.  The caller
-  // is responsible for calling setNeedsUpdateDrawProperties on the host
-  // so that its list can be recreated.
-  void CreateRenderSurface();
-  void ClearRenderSurface() { draw_properties_.render_surface.reset(); }
-
-  DrawProperties<LayerImpl, RenderSurfaceImpl>& draw_properties() {
-    return draw_properties_;
-  }
-  const DrawProperties<LayerImpl, RenderSurfaceImpl>& draw_properties() const {
-    return draw_properties_;
-  }
-
-  // The following are shortcut accessors to get various information from
-  // draw_properties_
-  const gfx::Transform& draw_transform() const {
-    return draw_properties_.target_space_transform;
-  }
-  const gfx::Transform& screen_space_transform() const {
-    return draw_properties_.screen_space_transform;
-  }
-  float draw_opacity() const { return draw_properties_.opacity; }
-  bool draw_opacity_is_animating() const {
-    return draw_properties_.opacity_is_animating;
-  }
-  bool draw_transform_is_animating() const {
-    return draw_properties_.target_space_transform_is_animating;
-  }
-  bool screen_space_transform_is_animating() const {
-    return draw_properties_.screen_space_transform_is_animating;
-  }
-  bool screen_space_opacity_is_animating() const {
-    return draw_properties_.screen_space_opacity_is_animating;
-  }
-  bool can_use_lcd_text() const { return draw_properties_.can_use_lcd_text; }
-  bool is_clipped() const { return draw_properties_.is_clipped; }
-  gfx::Rect clip_rect() const { return draw_properties_.clip_rect; }
-  gfx::Rect drawable_content_rect() const {
-    return draw_properties_.drawable_content_rect;
-  }
-  gfx::Rect visible_content_rect() const {
-    return draw_properties_.visible_content_rect;
-  }
-  LayerImpl* render_target() {
-    DCHECK(!draw_properties_.render_target ||
-           draw_properties_.render_target->render_surface());
-    return draw_properties_.render_target;
-  }
-  const LayerImpl* render_target() const {
-    DCHECK(!draw_properties_.render_target ||
-           draw_properties_.render_target->render_surface());
-    return draw_properties_.render_target;
-  }
-  RenderSurfaceImpl* render_surface() const {
- return draw_properties_.render_surface.get();
-  }
-
-  // The client should be responsible for setting bounds, contentBounds and
-  // contentsScale to appropriate values. LayerImpl doesn't calculate any of
-  // them from the other values.
-
-  void SetBounds(gfx::Size bounds);
-  gfx::Size bounds() const { return bounds_; }
-
-  void SetContentBounds(gfx::Size content_bounds);
-  gfx::Size content_bounds() const { return draw_properties_.content_bounds; }
-
-  float contents_scale_x() const { return draw_properties_.contents_scale_x; }
-  float contents_scale_y() const { return draw_properties_.contents_scale_y; }
-  void SetContentsScale(float contents_scale_x, float contents_scale_y);
-
-  virtual void CalculateContentsScale(float ideal_contents_scale,
-                                      bool animating_transform_to_screen,
-                                      float* contents_scale_x,
-                                      float* contents_scale_y,
-                                      gfx::Size* contentBounds);
-
-  void SetScrollOffset(gfx::Vector2d scroll_offset);
-  gfx::Vector2d scroll_offset() const { return scroll_offset_; }
-
-  void SetMaxScrollOffset(gfx::Vector2d max_scroll_offset);
-  gfx::Vector2d max_scroll_offset() const { return max_scroll_offset_; }
-
-  void SetScrollDelta(gfx::Vector2dF scroll_delta);
-  gfx::Vector2dF scroll_delta() const { return scroll_delta_; }
-
-  gfx::Vector2dF TotalScrollOffset() const;
-
-  void SetImplTransform(const gfx::Transform& transform);
-  const gfx::Transform& impl_transform() const { return impl_transform_; }
-
-  void SetSentScrollDelta(gfx::Vector2d sent_scroll_delta);
-  gfx::Vector2d sent_scroll_delta() const { return sent_scroll_delta_; }
-
-  // Returns the delta of the scroll that was outside of the bounds of the
-  // initial scroll
-  gfx::Vector2dF ScrollBy(gfx::Vector2dF scroll);
-
-  void SetScrollable(bool scrollable) { scrollable_ = scrollable; }
-  bool scrollable() const { return scrollable_; }
-
-  void SetShouldScrollOnMainThread(bool should_scroll_on_main_thread) {
-    should_scroll_on_main_thread_ = should_scroll_on_main_thread;
-  }
-  bool should_scroll_on_main_thread() const {
-    return should_scroll_on_main_thread_;
-  }
-
-  void SetHaveWheelEventHandlers(bool have_wheel_event_handlers) {
-    have_wheel_event_handlers_ = have_wheel_event_handlers;
-  }
-  bool have_wheel_event_handlers() const { return have_wheel_event_handlers_; }
-
-  void SetNonFastScrollableRegion(const Region& region) {
-    non_fast_scrollable_region_ = region;
-  }
-  const Region& non_fast_scrollable_region() const {
-    return non_fast_scrollable_region_;
-  }
-
-  void SetTouchEventHandlerRegion(const Region& region) {
-    touch_event_handler_region_ = region;
-  }
-  const Region& touch_event_handler_region() const {
-    return touch_event_handler_region_;
-  }
-
-  void SetDrawCheckerboardForMissingTiles(bool checkerboard) {
-    draw_checkerboard_for_missing_tiles_ = checkerboard;
-  }
-  bool DrawCheckerboardForMissingTiles() const;
-
-  InputHandlerClient::ScrollStatus TryScroll(
-      gfx::PointF screen_space_point,
-      InputHandlerClient::ScrollInputType type) const;
-
-  void SetDoubleSided(bool double_sided);
-  bool double_sided() const { return double_sided_; }
-
-  void SetTransform(const gfx::Transform& transform);
-  const gfx::Transform& transform() const { return transform_; }
-  bool TransformIsAnimating() const;
-  bool TransformIsAnimatingOnImplOnly() const;
-
-  void set_update_rect(const gfx::RectF& update_rect) {
-    update_rect_ = update_rect;
-  }
-  const gfx::RectF& update_rect() const { return update_rect_; }
-
-  std::string LayerTreeAsText() const;
-  virtual base::DictionaryValue* LayerTreeAsJson() const;
-
-  void SetStackingOrderChanged(bool stacking_order_changed);
-
-  bool LayerPropertyChanged() const {
-    return layer_property_changed_ || LayerIsAlwaysDamaged();
-  }
-  bool LayerSurfacePropertyChanged() const;
-
-  void ResetAllChangeTrackingForSubtree();
-
-  virtual bool LayerIsAlwaysDamaged() const;
-
-  LayerAnimationController* layer_animation_controller() {
-    return layer_animation_controller_.get();
-  }
-
-  virtual Region VisibleContentOpaqueRegion() const;
-
-  virtual void DidBecomeActive();
-
-  // Indicates that the surface previously used to render this layer
-  // was lost and that a new one has been created. Won't be called
-  // until the new surface has been created successfully.
-  virtual void DidLoseOutputSurface();
-
-  ScrollbarAnimationController* scrollbar_animation_controller() const {
-    return scrollbar_animation_controller_.get();
-  }
-
-  void SetScrollbarOpacity(float opacity);
-
-  void SetHorizontalScrollbarLayer(ScrollbarLayerImpl* scrollbar_layer);
-  ScrollbarLayerImpl* horizontal_scrollbar_layer() {
-    return horizontal_scrollbar_layer_;
-  }
-
-  void SetVerticalScrollbarLayer(ScrollbarLayerImpl* scrollbar_layer);
-  ScrollbarLayerImpl* vertical_scrollbar_layer() {
-    return vertical_scrollbar_layer_;
-  }
-
-  gfx::Rect LayerRectToContentRect(const gfx::RectF& layer_rect) const;
-
-  virtual skia::RefPtr<SkPicture> GetPicture();
-
-  virtual bool CanClipSelf() const;
-
-  virtual bool AreVisibleResourcesReady() const;
-
-  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl);
-  virtual void PushPropertiesTo(LayerImpl* layer);
-
-  virtual scoped_ptr<base::Value> AsValue() const;
-
- protected:
-  LayerImpl(LayerTreeImpl* layer_impl, int id);
-
-  // Get the color and size of the layer's debug border.
-  virtual void GetDebugBorderProperties(SkColor* color, float* width) const;
-
-  void AppendDebugBorderQuad(QuadSink* quad_sink,
-                             const SharedQuadState* shared_quad_state,
-                             AppendQuadsData* append_quads_data) const;
-
-  virtual void DumpLayerProperties(std::string* str, int indent) const;
-  static std::string IndentString(int indent);
-
-  void AsValueInto(base::DictionaryValue* dict) const;
-
-  void NoteLayerSurfacePropertyChanged();
-  void NoteLayerPropertyChanged();
-  void NoteLayerPropertyChangedForSubtree();
-
-  // Note carefully this does not affect the current layer.
-  void NoteLayerPropertyChangedForDescendants();
-
- private:
-  void UpdateScrollbarPositions();
-
-  virtual const char* LayerTypeAsString() const;
-
-  void DumpLayer(std::string* str, int indent) const;
-
-  // Properties internal to LayerImpl
-  LayerImpl* parent_;
-  LayerList children_;
-  // mask_layer_ can be temporarily stolen during tree sync, we need this ID to
-  // confirm newly assigned layer is still the previous one
-  int mask_layer_id_;
-  scoped_ptr<LayerImpl> mask_layer_;
-  int replica_layer_id_;  // ditto
-  scoped_ptr<LayerImpl> replica_layer_;
-  int layer_id_;
-  LayerTreeImpl* layer_tree_impl_;
-
-  // Properties synchronized from the associated Layer.
-  gfx::PointF anchor_point_;
-  float anchor_point_z_;
-  gfx::Size bounds_;
-  gfx::Vector2d scroll_offset_;
-  bool scrollable_;
-  bool should_scroll_on_main_thread_;
-  bool have_wheel_event_handlers_;
-  Region non_fast_scrollable_region_;
-  Region touch_event_handler_region_;
-  SkColor background_color_;
-  bool stacking_order_changed_;
-
-  // Whether the "back" of this layer should draw.
-  bool double_sided_;
-
-  // Tracks if drawing-related properties have changed since last redraw.
-  bool layer_property_changed_;
-
-  // Indicates that a property has changed on this layer that would not
-  // affect the pixels on its target surface, but would require redrawing
-  // the targetSurface onto its ancestor targetSurface.
-  // For layers that do not own a surface this flag acts as
-  // layer_property_changed_.
-  bool layer_surface_property_changed_;
-
-  bool masks_to_bounds_;
-  bool contents_opaque_;
-  float opacity_;
-  gfx::PointF position_;
-  bool preserves_3d_;
-  bool use_parent_backface_visibility_;
-  bool draw_checkerboard_for_missing_tiles_;
-  gfx::Transform sublayer_transform_;
-  gfx::Transform transform_;
-
-  bool draws_content_;
-  bool force_render_surface_;
-
-  // Set for the layer that other layers are fixed to.
-  bool is_container_for_fixed_position_layers_;
-  // This is true if the layer should be fixed to the closest ancestor
-  // container.
-  bool fixed_to_container_layer_;
-
-  gfx::Vector2dF scroll_delta_;
-  gfx::Vector2d sent_scroll_delta_;
-  gfx::Vector2d max_scroll_offset_;
-  gfx::Transform impl_transform_;
-  gfx::Vector2dF last_scroll_offset_;
-
-  // The global depth value of the center of the layer. This value is used
-  // to sort layers from back to front.
-  float draw_depth_;
-
-  // Debug layer name.
-  std::string debug_name_;
-
-  WebKit::WebFilterOperations filters_;
-  WebKit::WebFilterOperations background_filters_;
-  skia::RefPtr<SkImageFilter> filter_;
-
-#ifndef NDEBUG
-  bool between_will_draw_and_did_draw_;
-#endif
-
-  // Rect indicating what was repainted/updated during update.
-  // Note that plugin layers bypass this and leave it empty.
-  // Uses layer's content space.
-  gfx::RectF update_rect_;
-
-  // Manages animations for this layer.
-  scoped_refptr<LayerAnimationController> layer_animation_controller_;
-
-  // Manages scrollbars for this layer
-  scoped_ptr<ScrollbarAnimationController> scrollbar_animation_controller_;
-
-  // Weak pointers to this layer's scrollbars, if it has them. Updated during
-  // tree synchronization.
-  ScrollbarLayerImpl* horizontal_scrollbar_layer_;
-  ScrollbarLayerImpl* vertical_scrollbar_layer_;
-
-  // Group of properties that need to be computed based on the layer tree
-  // hierarchy before layers can be drawn.
-  DrawProperties<LayerImpl, RenderSurfaceImpl> draw_properties_;
-
-  DISALLOW_COPY_AND_ASSIGN(LayerImpl);
-};
-
-}
-
-#endif  // CC_LAYER_IMPL_H_