src/cc/layers/picture_layer_impl.h

   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 <string>
   9 #include <vector>
  10
  11 #include "cc/base/cc_export.h"
  12 #include "cc/base/scoped_ptr_vector.h"
  13 #include "cc/layers/layer_impl.h"
  14 #include "cc/resources/picture_layer_tiling.h"
  15 #include "cc/resources/picture_layer_tiling_set.h"
  16 #include "cc/resources/picture_pile_impl.h"
  17 #include "skia/ext/refptr.h"
  18 #include "third_party/skia/include/core/SkPicture.h"
  19
  20 namespace cc {
  21
  22 struct AppendQuadsData;
  23 class QuadSink;
  24 class MicroBenchmarkImpl;
  25
  26 class CC_EXPORT PictureLayerImpl
  27     : public LayerImpl,
  28       NON_EXPORTED_BASE(public PictureLayerTilingClient) {
  29  public:
  30   static scoped_ptr<PictureLayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
  31     return make_scoped_ptr(new PictureLayerImpl(tree_impl, id));
  32   }
  33   virtual ~PictureLayerImpl();
  34
  35   // LayerImpl overrides.
  36   virtual const char* LayerTypeAsString() const OVERRIDE;
  37   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
  38       OVERRIDE;
  39   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
  40   virtual void AppendQuads(QuadSink* quad_sink,
  41                            AppendQuadsData* append_quads_data) OVERRIDE;
  42   virtual void UpdateTilePriorities() OVERRIDE;
  43   virtual void DidBecomeActive() OVERRIDE;
  44   virtual void DidBeginTracing() OVERRIDE;
  45   virtual void ReleaseResources() OVERRIDE;
  46   virtual void CalculateContentsScale(float ideal_contents_scale,
  47                                       float device_scale_factor,
  48                                       float page_scale_factor,
  49                                       bool animating_transform_to_screen,
  50                                       float* contents_scale_x,
  51                                       float* contents_scale_y,
  52                                       gfx::Size* content_bounds) OVERRIDE;
  53   virtual skia::RefPtr<SkPicture> GetPicture() OVERRIDE;
  54
  55   // PictureLayerTilingClient overrides.
  56   virtual scoped_refptr<Tile> CreateTile(
  57     PictureLayerTiling* tiling,
  58     const gfx::Rect& content_rect) OVERRIDE;
  59   virtual void UpdatePile(Tile* tile) OVERRIDE;
  60   virtual gfx::Size CalculateTileSize(
  61       const gfx::Size& content_bounds) const OVERRIDE;
  62   virtual const Region* GetInvalidation() OVERRIDE;
  63   virtual const PictureLayerTiling* GetTwinTiling(
  64       const PictureLayerTiling* tiling) const OVERRIDE;
  65   virtual size_t GetMaxTilesForInterestArea() const OVERRIDE;
  66   virtual float GetSkewportTargetTimeInSeconds() const OVERRIDE;
  67   virtual int GetSkewportExtrapolationLimitInContentPixels() const OVERRIDE;
  68
  69   // PushPropertiesTo active tree => pending tree.
  70   void SyncTiling(const PictureLayerTiling* tiling);
  71
  72   // Mask-related functions
  73   void SetIsMask(bool is_mask);
  74   virtual ResourceProvider::ResourceId ContentsResourceId() const OVERRIDE;
  75
  76   virtual size_t GPUMemoryUsageInBytes() const OVERRIDE;
  77
  78   virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) OVERRIDE;
  79
  80   void SetShouldUseGpuRasterization(bool should_use_gpu_rasterization);
  81   bool should_use_gpu_rasterization() const {
  82     return should_use_gpu_rasterization_;
  83   }
  84
  85  protected:
  86   PictureLayerImpl(LayerTreeImpl* tree_impl, int id);
  87   PictureLayerTiling* AddTiling(float contents_scale);
  88   void RemoveTiling(float contents_scale);
  89   void RemoveAllTilings();
  90   void SyncFromActiveLayer(const PictureLayerImpl* other);
  91   void ManageTilings(bool animating_transform_to_screen);
  92   bool ShouldHaveLowResTiling() const {
  93     return !should_use_gpu_rasterization();
  94   }
  95   virtual bool ShouldAdjustRasterScale(
  96       bool animating_transform_to_screen) const;
  97   virtual void RecalculateRasterScales(
  98       bool animating_transform_to_screen);
  99   void CleanUpTilingsOnActiveLayer(
 100       std::vector<PictureLayerTiling*> used_tilings);
 101   float MinimumContentsScale() const;
 102   float SnappedContentsScale(float new_contents_scale);
 103   void UpdateLCDTextStatus(bool new_status);
 104   void ResetRasterScale();
 105   void MarkVisibleResourcesAsRequired() const;
 106   bool MarkVisibleTilesAsRequired(
 107       PictureLayerTiling* tiling,
 108       const PictureLayerTiling* optional_twin_tiling,
 109       float contents_scale,
 110       const gfx::Rect& rect,
 111       const Region& missing_region) const;
 112
 113   void DoPostCommitInitializationIfNeeded() {
 114     if (needs_post_commit_initialization_)
 115       DoPostCommitInitialization();
 116   }
 117   void DoPostCommitInitialization();
 118
 119   bool CanHaveTilings() const;
 120   bool CanHaveTilingWithScale(float contents_scale) const;
 121   void SanityCheckTilingState() const;
 122
 123   virtual void GetDebugBorderProperties(
 124       SkColor* color, float* width) const OVERRIDE;
 125   virtual void AsValueInto(base::DictionaryValue* dict) const OVERRIDE;
 126
 127   PictureLayerImpl* twin_layer_;
 128
 129   scoped_ptr<PictureLayerTilingSet> tilings_;
 130   scoped_refptr<PicturePileImpl> pile_;
 131   Region invalidation_;
 132
 133   bool is_mask_;
 134
 135   float ideal_page_scale_;
 136   float ideal_device_scale_;
 137   float ideal_source_scale_;
 138   float ideal_contents_scale_;
 139
 140   float raster_page_scale_;
 141   float raster_device_scale_;
 142   float raster_source_scale_;
 143   float raster_contents_scale_;
 144   float low_res_raster_contents_scale_;
 145
 146   bool raster_source_scale_was_animating_;
 147   bool is_using_lcd_text_;
 148   bool needs_post_commit_initialization_;
 149   // A sanity state check to make sure UpdateTilePriorities only gets called
 150   // after a CalculateContentsScale/ManageTilings.
 151   bool should_update_tile_priorities_;
 152   bool should_use_gpu_rasterization_;
 153
 154   friend class PictureLayer;
 155   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 156 };
 157
 158 }  // namespace cc
 159
 160 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_