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_LAYERS_PICTURE_LAYER_IMPL_H_ 6 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_ 7 8 #include <set> 9 #include <string> 10 #include <vector> 11 12 #include "cc/base/cc_export.h" 13 #include "cc/base/scoped_ptr_vector.h" 14 #include "cc/layers/layer_impl.h" 15 #include "cc/resources/picture_layer_tiling.h" 16 #include "cc/resources/picture_layer_tiling_set.h" 17 #include "cc/resources/picture_pile_impl.h" 18 #include "skia/ext/refptr.h" 19 #include "third_party/skia/include/core/SkPicture.h" 20 21 namespace cc { 22 23 struct AppendQuadsData; 24 class MicroBenchmarkImpl; 25 class Tile; 26 27 class CC_EXPORT PictureLayerImpl 28 : public LayerImpl, 29 NON_EXPORTED_BASE(public PictureLayerTilingClient) { 30 public: 31 struct CC_EXPORT Pair { 32 Pair(); 33 Pair(PictureLayerImpl* active_layer, PictureLayerImpl* pending_layer); 34 ~Pair(); 35 36 PictureLayerImpl* active; 37 PictureLayerImpl* pending; 38 }; 39 40 class CC_EXPORT LayerRasterTileIterator { 41 public: 42 LayerRasterTileIterator(); 43 LayerRasterTileIterator(PictureLayerImpl* layer, bool prioritize_low_res); 44 ~LayerRasterTileIterator(); 45 46 Tile* operator*(); 47 const Tile* operator*() const; 48 LayerRasterTileIterator& operator++(); 49 operator bool() const; 50 51 private: 52 enum IteratorType { LOW_RES, HIGH_RES, NUM_ITERATORS }; 53 54 void AdvanceToNextStage(); 55 56 PictureLayerImpl* layer_; 57 58 struct IterationStage { 59 IteratorType iterator_type; 60 TilePriority::PriorityBin tile_type; 61 }; 62 63 size_t current_stage_; 64 65 // One low res stage, and three high res stages. 66 IterationStage stages_[4]; 67 PictureLayerTiling::TilingRasterTileIterator iterators_[NUM_ITERATORS]; 68 }; 69 70 class CC_EXPORT LayerEvictionTileIterator { 71 public: 72 LayerEvictionTileIterator(); 73 LayerEvictionTileIterator(PictureLayerImpl* layer, 74 TreePriority tree_priority); 75 ~LayerEvictionTileIterator(); 76 77 Tile* operator*(); 78 const Tile* operator*() const; 79 LayerEvictionTileIterator& operator++(); 80 operator bool() const; 81 82 private: 83 bool AdvanceToNextCategory(); 84 bool AdvanceToNextTilingRangeType(); 85 bool AdvanceToNextTiling(); 86 87 PictureLayerTilingSet::TilingRange CurrentTilingRange() const; 88 size_t CurrentTilingIndex() const; 89 90 PictureLayerImpl* layer_; 91 TreePriority tree_priority_; 92 93 PictureLayerTiling::EvictionCategory current_category_; 94 PictureLayerTilingSet::TilingRangeType current_tiling_range_type_; 95 size_t current_tiling_; 96 PictureLayerTiling::TilingEvictionTileIterator current_iterator_; 97 }; 98 Create(LayerTreeImpl * tree_impl,int id)99 static scoped_ptr<PictureLayerImpl> Create(LayerTreeImpl* tree_impl, int id) { 100 return make_scoped_ptr(new PictureLayerImpl(tree_impl, id)); 101 } 102 virtual ~PictureLayerImpl(); 103 104 // LayerImpl overrides. 105 virtual const char* LayerTypeAsString() const OVERRIDE; 106 virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) 107 OVERRIDE; 108 virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE; 109 virtual void AppendQuads(RenderPass* render_pass, 110 const OcclusionTracker<LayerImpl>& occlusion_tracker, 111 AppendQuadsData* append_quads_data) OVERRIDE; 112 virtual void UpdateTiles(const Occlusion& occlusion_in_content_space, 113 bool resourceless_software_draw) OVERRIDE; 114 virtual void NotifyTileStateChanged(const Tile* tile) OVERRIDE; 115 virtual void DidBecomeActive() OVERRIDE; 116 virtual void DidBeginTracing() OVERRIDE; 117 virtual void ReleaseResources() OVERRIDE; 118 virtual skia::RefPtr<SkPicture> GetPicture() OVERRIDE; 119 120 // PictureLayerTilingClient overrides. 121 virtual scoped_refptr<Tile> CreateTile( 122 PictureLayerTiling* tiling, 123 const gfx::Rect& content_rect) OVERRIDE; 124 virtual PicturePileImpl* GetPile() OVERRIDE; 125 virtual gfx::Size CalculateTileSize( 126 const gfx::Size& content_bounds) const OVERRIDE; 127 virtual const Region* GetInvalidation() OVERRIDE; 128 virtual const PictureLayerTiling* GetTwinTiling( 129 const PictureLayerTiling* tiling) const OVERRIDE; 130 virtual PictureLayerTiling* GetRecycledTwinTiling( 131 const PictureLayerTiling* tiling) OVERRIDE; 132 virtual size_t GetMaxTilesForInterestArea() const OVERRIDE; 133 virtual float GetSkewportTargetTimeInSeconds() const OVERRIDE; 134 virtual int GetSkewportExtrapolationLimitInContentPixels() const OVERRIDE; 135 virtual WhichTree GetTree() const OVERRIDE; 136 137 // PushPropertiesTo active tree => pending tree. 138 void SyncTiling(const PictureLayerTiling* tiling); 139 140 // Mask-related functions. 141 virtual ResourceProvider::ResourceId ContentsResourceId() const OVERRIDE; 142 143 virtual size_t GPUMemoryUsageInBytes() const OVERRIDE; 144 145 virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) OVERRIDE; 146 147 // Functions used by tile manager. GetTwinLayer()148 PictureLayerImpl* GetTwinLayer() { return twin_layer_; } 149 bool IsOnActiveOrPendingTree() const; 150 // Virtual for testing. 151 virtual bool HasValidTilePriorities() const; 152 bool AllTilesRequiredForActivationAreReadyToDraw() const; 153 154 protected: 155 friend class LayerRasterTileIterator; 156 157 PictureLayerImpl(LayerTreeImpl* tree_impl, int id); 158 PictureLayerTiling* AddTiling(float contents_scale); 159 void RemoveTiling(float contents_scale); 160 void RemoveAllTilings(); 161 void SyncFromActiveLayer(const PictureLayerImpl* other); 162 void AddTilingsForRasterScale(); 163 void UpdateTilePriorities(const Occlusion& occlusion_in_content_space); 164 virtual bool ShouldAdjustRasterScale() const; 165 virtual void RecalculateRasterScales(); 166 void CleanUpTilingsOnActiveLayer( 167 std::vector<PictureLayerTiling*> used_tilings); 168 float MinimumContentsScale() const; 169 float SnappedContentsScale(float new_contents_scale); 170 void ResetRasterScale(); 171 void MarkVisibleResourcesAsRequired() const; 172 bool MarkVisibleTilesAsRequired( 173 PictureLayerTiling* tiling, 174 const PictureLayerTiling* optional_twin_tiling, 175 const gfx::Rect& rect, 176 const Region& missing_region) const; 177 gfx::Rect GetViewportForTilePriorityInContentSpace() const; 178 PictureLayerImpl* GetRecycledTwinLayer(); 179 void UpdatePile(scoped_refptr<PicturePileImpl> pile); 180 DoPostCommitInitializationIfNeeded()181 void DoPostCommitInitializationIfNeeded() { 182 if (needs_post_commit_initialization_) 183 DoPostCommitInitialization(); 184 } 185 void DoPostCommitInitialization(); 186 187 bool CanHaveTilings() const; 188 bool CanHaveTilingWithScale(float contents_scale) const; 189 void SanityCheckTilingState() const; 190 191 bool ShouldAdjustRasterScaleDuringScaleAnimations() const; 192 193 virtual void GetDebugBorderProperties( 194 SkColor* color, float* width) const OVERRIDE; 195 virtual void GetAllTilesForTracing( 196 std::set<const Tile*>* tiles) const OVERRIDE; 197 virtual void AsValueInto(base::debug::TracedValue* dict) const OVERRIDE; 198 199 virtual void UpdateIdealScales(); 200 float MaximumTilingContentsScale() const; 201 202 PictureLayerImpl* twin_layer_; 203 204 scoped_ptr<PictureLayerTilingSet> tilings_; 205 scoped_refptr<PicturePileImpl> pile_; 206 Region invalidation_; 207 208 float ideal_page_scale_; 209 float ideal_device_scale_; 210 float ideal_source_scale_; 211 float ideal_contents_scale_; 212 213 float raster_page_scale_; 214 float raster_device_scale_; 215 float raster_source_scale_; 216 float raster_contents_scale_; 217 float low_res_raster_contents_scale_; 218 219 bool raster_source_scale_is_fixed_; 220 bool was_screen_space_transform_animating_; 221 bool needs_post_commit_initialization_; 222 // A sanity state check to make sure UpdateTilePriorities only gets called 223 // after a CalculateContentsScale/ManageTilings. 224 bool should_update_tile_priorities_; 225 226 // Save a copy of the visible rect and viewport size of the last frame that 227 // has a valid viewport for prioritizing tiles. 228 gfx::Rect visible_rect_for_tile_priority_; 229 gfx::Rect viewport_rect_for_tile_priority_; 230 gfx::Transform screen_space_transform_for_tile_priority_; 231 232 friend class PictureLayer; 233 DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl); 234 }; 235 236 } // namespace cc 237 238 #endif // CC_LAYERS_PICTURE_LAYER_IMPL_H_ 239