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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_LAYERS_PICTURE_LAYER_IMPL_H_
#define CC_LAYERS_PICTURE_LAYER_IMPL_H_
#include <set>
#include <string>
#include <vector>
#include "cc/base/cc_export.h"
#include "cc/base/scoped_ptr_vector.h"
#include "cc/layers/layer_impl.h"
#include "cc/resources/picture_layer_tiling.h"
#include "cc/resources/picture_layer_tiling_set.h"
#include "cc/resources/picture_pile_impl.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkPicture.h"
namespace cc {
struct AppendQuadsData;
class MicroBenchmarkImpl;
class Tile;
class CC_EXPORT PictureLayerImpl
: public LayerImpl,
NON_EXPORTED_BASE(public PictureLayerTilingClient) {
public:
struct CC_EXPORT Pair {
Pair();
Pair(PictureLayerImpl* active_layer, PictureLayerImpl* pending_layer);
~Pair();
PictureLayerImpl* active;
PictureLayerImpl* pending;
};
class CC_EXPORT LayerRasterTileIterator {
public:
LayerRasterTileIterator();
LayerRasterTileIterator(PictureLayerImpl* layer, bool prioritize_low_res);
~LayerRasterTileIterator();
Tile* operator*();
const Tile* operator*() const;
LayerRasterTileIterator& operator++();
operator bool() const;
private:
enum IteratorType { LOW_RES, HIGH_RES, NUM_ITERATORS };
void AdvanceToNextStage();
PictureLayerImpl* layer_;
struct IterationStage {
IteratorType iterator_type;
TilePriority::PriorityBin tile_type;
};
size_t current_stage_;
// One low res stage, and three high res stages.
IterationStage stages_[4];
PictureLayerTiling::TilingRasterTileIterator iterators_[NUM_ITERATORS];
};
class CC_EXPORT LayerEvictionTileIterator {
public:
LayerEvictionTileIterator();
LayerEvictionTileIterator(PictureLayerImpl* layer,
TreePriority tree_priority);
~LayerEvictionTileIterator();
Tile* operator*();
const Tile* operator*() const;
LayerEvictionTileIterator& operator++();
operator bool() const;
private:
bool AdvanceToNextCategory();
bool AdvanceToNextTilingRangeType();
bool AdvanceToNextTiling();
PictureLayerTilingSet::TilingRange CurrentTilingRange() const;
size_t CurrentTilingIndex() const;
PictureLayerImpl* layer_;
TreePriority tree_priority_;
PictureLayerTiling::EvictionCategory current_category_;
PictureLayerTilingSet::TilingRangeType current_tiling_range_type_;
size_t current_tiling_;
PictureLayerTiling::TilingEvictionTileIterator current_iterator_;
};
static scoped_ptr<PictureLayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
return make_scoped_ptr(new PictureLayerImpl(tree_impl, id));
}
virtual ~PictureLayerImpl();
// LayerImpl overrides.
virtual const char* LayerTypeAsString() const override;
virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
override;
virtual void PushPropertiesTo(LayerImpl* layer) override;
virtual void AppendQuads(RenderPass* render_pass,
const OcclusionTracker<LayerImpl>& occlusion_tracker,
AppendQuadsData* append_quads_data) override;
virtual void UpdateTiles(const Occlusion& occlusion_in_content_space,
bool resourceless_software_draw) override;
virtual void NotifyTileStateChanged(const Tile* tile) override;
virtual void DidBecomeActive() override;
virtual void DidBeginTracing() override;
virtual void ReleaseResources() override;
virtual skia::RefPtr<SkPicture> GetPicture() override;
// PictureLayerTilingClient overrides.
virtual scoped_refptr<Tile> CreateTile(
PictureLayerTiling* tiling,
const gfx::Rect& content_rect) override;
virtual PicturePileImpl* GetPile() override;
virtual gfx::Size CalculateTileSize(
const gfx::Size& content_bounds) const override;
virtual const Region* GetInvalidation() override;
virtual const PictureLayerTiling* GetTwinTiling(
const PictureLayerTiling* tiling) const override;
virtual PictureLayerTiling* GetRecycledTwinTiling(
const PictureLayerTiling* tiling) override;
virtual size_t GetMaxTilesForInterestArea() const override;
virtual float GetSkewportTargetTimeInSeconds() const override;
virtual int GetSkewportExtrapolationLimitInContentPixels() const override;
virtual WhichTree GetTree() const override;
// PushPropertiesTo active tree => pending tree.
void SyncTiling(const PictureLayerTiling* tiling);
// Mask-related functions.
virtual ResourceProvider::ResourceId ContentsResourceId() const override;
virtual size_t GPUMemoryUsageInBytes() const override;
virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) override;
// Functions used by tile manager.
PictureLayerImpl* GetTwinLayer() { return twin_layer_; }
bool IsOnActiveOrPendingTree() const;
// Virtual for testing.
virtual bool HasValidTilePriorities() const;
bool AllTilesRequiredForActivationAreReadyToDraw() const;
protected:
friend class LayerRasterTileIterator;
PictureLayerImpl(LayerTreeImpl* tree_impl, int id);
PictureLayerTiling* AddTiling(float contents_scale);
void RemoveTiling(float contents_scale);
void RemoveAllTilings();
void SyncFromActiveLayer(const PictureLayerImpl* other);
void AddTilingsForRasterScale();
void UpdateTilePriorities(const Occlusion& occlusion_in_content_space);
virtual bool ShouldAdjustRasterScale() const;
virtual void RecalculateRasterScales();
void CleanUpTilingsOnActiveLayer(
std::vector<PictureLayerTiling*> used_tilings);
float MinimumContentsScale() const;
float SnappedContentsScale(float new_contents_scale);
void ResetRasterScale();
void MarkVisibleResourcesAsRequired() const;
bool MarkVisibleTilesAsRequired(
PictureLayerTiling* tiling,
const PictureLayerTiling* optional_twin_tiling,
const gfx::Rect& rect,
const Region& missing_region) const;
gfx::Rect GetViewportForTilePriorityInContentSpace() const;
PictureLayerImpl* GetRecycledTwinLayer();
void DoPostCommitInitializationIfNeeded() {
if (needs_post_commit_initialization_)
DoPostCommitInitialization();
}
void DoPostCommitInitialization();
bool CanHaveTilings() const;
bool CanHaveTilingWithScale(float contents_scale) const;
void SanityCheckTilingState() const;
bool ShouldAdjustRasterScaleDuringScaleAnimations() const;
virtual void GetDebugBorderProperties(
SkColor* color, float* width) const override;
virtual void GetAllTilesForTracing(
std::set<const Tile*>* tiles) const override;
virtual void AsValueInto(base::debug::TracedValue* dict) const override;
virtual void UpdateIdealScales();
float MaximumTilingContentsScale() const;
PictureLayerImpl* twin_layer_;
scoped_ptr<PictureLayerTilingSet> tilings_;
scoped_refptr<PicturePileImpl> pile_;
Region invalidation_;
float ideal_page_scale_;
float ideal_device_scale_;
float ideal_source_scale_;
float ideal_contents_scale_;
float raster_page_scale_;
float raster_device_scale_;
float raster_source_scale_;
float raster_contents_scale_;
float low_res_raster_contents_scale_;
bool raster_source_scale_is_fixed_;
bool was_screen_space_transform_animating_;
bool needs_post_commit_initialization_;
// A sanity state check to make sure UpdateTilePriorities only gets called
// after a CalculateContentsScale/ManageTilings.
bool should_update_tile_priorities_;
// Save a copy of the visible rect and viewport size of the last frame that
// has a valid viewport for prioritizing tiles.
gfx::Rect visible_rect_for_tile_priority_;
gfx::Rect viewport_rect_for_tile_priority_;
gfx::Transform screen_space_transform_for_tile_priority_;
friend class PictureLayer;
DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
};
} // namespace cc
#endif // CC_LAYERS_PICTURE_LAYER_IMPL_H_
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