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// Copyright 2012 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_IMPL_H_
#define CC_TREES_LAYER_TREE_IMPL_H_
#include <string>
#include <vector>
#include "base/containers/hash_tables.h"
#include "base/values.h"
#include "cc/layers/layer_impl.h"
#include "ui/base/latency_info.h"
#if defined(COMPILER_GCC)
namespace BASE_HASH_NAMESPACE {
template<>
struct hash<cc::LayerImpl*> {
size_t operator()(cc::LayerImpl* ptr) const {
return hash<size_t>()(reinterpret_cast<size_t>(ptr));
}
};
} // namespace BASE_HASH_NAMESPACE
#endif // COMPILER
namespace cc {
class DebugRectHistory;
class FrameRateCounter;
class HeadsUpDisplayLayerImpl;
class LayerTreeDebugState;
class LayerTreeHostImpl;
class LayerTreeImpl;
class LayerTreeSettings;
class MemoryHistory;
class OutputSurface;
class PaintTimeCounter;
class Proxy;
class ResourceProvider;
class TileManager;
struct RendererCapabilities;
class CC_EXPORT LayerTreeImpl {
public:
static scoped_ptr<LayerTreeImpl> create(
LayerTreeHostImpl* layer_tree_host_impl) {
return make_scoped_ptr(new LayerTreeImpl(layer_tree_host_impl));
}
virtual ~LayerTreeImpl();
// Methods called by the layer tree that pass-through or access LTHI.
// ---------------------------------------------------------------------------
const LayerTreeSettings& settings() const;
const RendererCapabilities& GetRendererCapabilities() const;
OutputSurface* output_surface() const;
ResourceProvider* resource_provider() const;
TileManager* tile_manager() const;
FrameRateCounter* frame_rate_counter() const;
PaintTimeCounter* paint_time_counter() const;
MemoryHistory* memory_history() const;
bool IsActiveTree() const;
bool IsPendingTree() const;
bool IsRecycleTree() const;
LayerImpl* FindActiveTreeLayerById(int id);
LayerImpl* FindPendingTreeLayerById(int id);
int MaxTextureSize() const;
bool PinchGestureActive() const;
base::TimeTicks CurrentFrameTimeTicks() const;
base::Time CurrentFrameTime() const;
base::TimeTicks CurrentPhysicalTimeTicks() const;
void SetNeedsCommit();
// Tree specific methods exposed to layer-impl tree.
// ---------------------------------------------------------------------------
void SetNeedsRedraw();
// TODO(nduca): These are implemented in cc files temporarily, but will become
// trivial accessors in a followup patch.
const LayerTreeDebugState& debug_state() const;
float device_scale_factor() const;
gfx::Size device_viewport_size() const;
DebugRectHistory* debug_rect_history() const;
scoped_ptr<base::Value> AsValue() const;
// Other public methods
// ---------------------------------------------------------------------------
LayerImpl* root_layer() const { return root_layer_.get(); }
void SetRootLayer(scoped_ptr<LayerImpl>);
scoped_ptr<LayerImpl> DetachLayerTree();
void PushPropertiesTo(LayerTreeImpl* tree_impl);
int source_frame_number() const { return source_frame_number_; }
void set_source_frame_number(int frame_number) {
source_frame_number_ = frame_number;
}
HeadsUpDisplayLayerImpl* hud_layer() { return hud_layer_; }
void set_hud_layer(HeadsUpDisplayLayerImpl* layer_impl) {
hud_layer_ = layer_impl;
}
LayerImpl* RootScrollLayer() const;
LayerImpl* RootClipLayer() const;
LayerImpl* CurrentlyScrollingLayer() const;
void SetCurrentlyScrollingLayer(LayerImpl* layer);
void ClearCurrentlyScrollingLayer();
void FindRootScrollLayer();
void UpdateMaxScrollOffset();
SkColor background_color() const { return background_color_; }
void set_background_color(SkColor color) { background_color_ = color; }
bool has_transparent_background() const {
return has_transparent_background_;
}
void set_has_transparent_background(bool transparent) {
has_transparent_background_ = transparent;
}
void SetPageScaleFactorAndLimits(float page_scale_factor,
float min_page_scale_factor, float max_page_scale_factor);
void SetPageScaleDelta(float delta);
float total_page_scale_factor() const {
return page_scale_factor_ * page_scale_delta_;
}
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_; }
float page_scale_delta() const { return page_scale_delta_; }
void set_sent_page_scale_delta(float delta) {
sent_page_scale_delta_ = delta;
}
float sent_page_scale_delta() const { return sent_page_scale_delta_; }
// Updates draw properties and render surface layer list, as well as tile
// priorities.
void UpdateDrawProperties();
void set_needs_update_draw_properties() {
needs_update_draw_properties_ = true;
}
bool needs_update_draw_properties() const {
return needs_update_draw_properties_;
}
void set_needs_full_tree_sync(bool needs) { needs_full_tree_sync_ = needs; }
bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
const LayerImplList& RenderSurfaceLayerList() const;
// These return the size of the root scrollable area and the size of
// the user-visible scrolling viewport, in CSS layout coordinates.
gfx::Size ScrollableSize() const;
gfx::SizeF ScrollableViewportSize() const;
LayerImpl* LayerById(int id);
// These should be called by LayerImpl's ctor/dtor.
void RegisterLayer(LayerImpl* layer);
void UnregisterLayer(LayerImpl* layer);
AnimationRegistrar* animationRegistrar() const;
void PushPersistedState(LayerTreeImpl* pending_tree);
void DidBecomeActive();
bool ContentsTexturesPurged() const;
void SetContentsTexturesPurged();
void ResetContentsTexturesPurged();
// Set on the active tree when the viewport size recently changed
// and the active tree's size is now out of date.
bool ViewportSizeInvalid() const;
void SetViewportSizeInvalid();
void ResetViewportSizeInvalid();
// Useful for debug assertions, probably shouldn't be used for anything else.
Proxy* proxy() const;
void SetRootLayerScrollOffsetDelegate(
LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate);
void SetLatencyInfo(const ui::LatencyInfo& latency_info);
const ui::LatencyInfo& GetLatencyInfo();
void ClearLatencyInfo();
void WillModifyTilePriorities();
void AddLayerWithCopyOutputRequest(LayerImpl* layer);
void RemoveLayerWithCopyOutputRequest(LayerImpl* layer);
const std::vector<LayerImpl*> LayersWithCopyOutputRequest() const;
protected:
explicit LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl);
void UpdateSolidColorScrollbars();
void UpdateRootScrollLayerSizeDelta();
LayerTreeHostImpl* layer_tree_host_impl_;
int source_frame_number_;
scoped_ptr<LayerImpl> root_layer_;
HeadsUpDisplayLayerImpl* hud_layer_;
LayerImpl* root_scroll_layer_;
LayerImpl* currently_scrolling_layer_;
LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate_;
SkColor background_color_;
bool has_transparent_background_;
float page_scale_factor_;
float page_scale_delta_;
float sent_page_scale_delta_;
float min_page_scale_factor_;
float max_page_scale_factor_;
typedef base::hash_map<int, LayerImpl*> LayerIdMap;
LayerIdMap layer_id_map_;
std::vector<LayerImpl*> layers_with_copy_output_request_;
// Persisted state for non-impl-side-painting.
int scrolling_layer_id_from_previous_tree_;
// List of visible layers for the most recently prepared frame. Used for
// rendering and input event hit testing.
LayerImplList render_surface_layer_list_;
bool contents_textures_purged_;
bool viewport_size_invalid_;
bool needs_update_draw_properties_;
// In impl-side painting mode, this is true when the tree may contain
// structural differences relative to the active tree.
bool needs_full_tree_sync_;
ui::LatencyInfo latency_info_;
private:
DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
};
} // namespace cc
#endif // CC_TREES_LAYER_TREE_IMPL_H_