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 <map>
   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/playback/picture_pile_impl.h"
  16 #include "cc/tiles/picture_layer_tiling.h"
  17 #include "cc/tiles/picture_layer_tiling_set.h"
  18 #include "cc/tiles/tiling_set_eviction_queue.h"
  19 #include "skia/ext/refptr.h"
  20 #include "third_party/skia/include/core/SkPicture.h"
  21
  22 namespace cc {
  23
  24 struct AppendQuadsData;
  25 class MicroBenchmarkImpl;
  26 class Tile;
  27
  28 class CC_EXPORT PictureLayerImpl
  29     : public LayerImpl,
  30       NON_EXPORTED_BASE(public PictureLayerTilingClient) {
  31  public:
  32   static scoped_ptr<PictureLayerImpl> Create(
  33       LayerTreeImpl* tree_impl,
  34       int id,
  35       bool is_mask,
  36       scoped_refptr<SyncedScrollOffset> scroll_offset) {
  37     return make_scoped_ptr(
  38         new PictureLayerImpl(tree_impl, id, is_mask, scroll_offset));
  39   }
  40   ~PictureLayerImpl() override;
  41
  42   bool is_mask() const { return is_mask_; }
  43
  44   // LayerImpl overrides.
  45   const char* LayerTypeAsString() const override;
  46   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
  47   void PushPropertiesTo(LayerImpl* layer) override;
  48   void AppendQuads(RenderPass* render_pass,
  49                    AppendQuadsData* append_quads_data) override;
  50   void NotifyTileStateChanged(const Tile* tile) override;
  51   void DidBeginTracing() override;
  52   void ReleaseResources() override;
  53   void RecreateResources() override;
  54   skia::RefPtr<SkPicture> GetPicture() override;
  55   Region GetInvalidationRegion() override;
  56
  57   // PictureLayerTilingClient overrides.
  58   ScopedTilePtr CreateTile(const Tile::CreateInfo& info) override;
  59   gfx::Size CalculateTileSize(const gfx::Size& content_bounds) const override;
  60   const Region* GetPendingInvalidation() override;
  61   const PictureLayerTiling* GetPendingOrActiveTwinTiling(
  62       const PictureLayerTiling* tiling) const override;
  63   bool HasValidTilePriorities() const override;
  64   bool RequiresHighResToDraw() const override;
  65   gfx::Rect GetEnclosingRectInTargetSpace() const override;
  66
  67   void set_gpu_raster_max_texture_size(gfx::Size gpu_raster_max_texture_size) {
  68     gpu_raster_max_texture_size_ = gpu_raster_max_texture_size;
  69   }
  70   void UpdateRasterSource(scoped_refptr<RasterSource> raster_source,
  71                           Region* new_invalidation,
  72                           const PictureLayerTilingSet* pending_set);
  73   bool UpdateTiles(bool resourceless_software_draw);
  74   void UpdateCanUseLCDTextAfterCommit();
  75   bool RasterSourceUsesLCDText() const;
  76   WhichTree GetTree() const;
  77
  78   // Mask-related functions.
  79   void GetContentsResourceId(ResourceId* resource_id,
  80                              gfx::Size* resource_size) const override;
  81
  82   void SetNearestNeighbor(bool nearest_neighbor);
  83
  84   size_t GPUMemoryUsageInBytes() const override;
  85
  86   void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) override;
  87
  88   bool CanHaveTilings() const;
  89
  90   PictureLayerTilingSet* picture_layer_tiling_set() { return tilings_.get(); }
  91
  92   // Functions used by tile manager.
  93   PictureLayerImpl* GetPendingOrActiveTwinLayer() const;
  94   bool IsOnActiveOrPendingTree() const;
  95
  96   // Used for benchmarking
  97   RasterSource* GetRasterSource() const { return raster_source_.get(); }
  98
  99  protected:
 100   friend class LayerRasterTileIterator;
 101   using TileRequirementCheck = bool (PictureLayerTiling::*)(const Tile*) const;
 102
 103   PictureLayerImpl(LayerTreeImpl* tree_impl,
 104                    int id,
 105                    bool is_mask,
 106                    scoped_refptr<SyncedScrollOffset> scroll_offset);
 107   PictureLayerTiling* AddTiling(float contents_scale);
 108   void RemoveAllTilings();
 109   void AddTilingsForRasterScale();
 110   void AddLowResolutionTilingIfNeeded();
 111   virtual bool ShouldAdjustRasterScale() const;
 112   virtual void RecalculateRasterScales();
 113   void CleanUpTilingsOnActiveLayer(
 114       const std::vector<PictureLayerTiling*>& used_tilings);
 115   float MinimumContentsScale() const;
 116   float MaximumContentsScale() const;
 117   void ResetRasterScale();
 118   void UpdateViewportRectForTilePriorityInContentSpace();
 119   PictureLayerImpl* GetRecycledTwinLayer() const;
 120
 121   void SanityCheckTilingState() const;
 122   bool ShouldAdjustRasterScaleDuringScaleAnimations() const;
 123
 124   void GetDebugBorderProperties(SkColor* color, float* width) const override;
 125   void GetAllPrioritizedTilesForTracing(
 126       std::vector<PrioritizedTile>* prioritized_tiles) const override;
 127   void AsValueInto(base::trace_event::TracedValue* dict) const override;
 128
 129   virtual void UpdateIdealScales();
 130   float MaximumTilingContentsScale() const;
 131   scoped_ptr<PictureLayerTilingSet> CreatePictureLayerTilingSet();
 132
 133   PictureLayerImpl* twin_layer_;
 134
 135   scoped_ptr<PictureLayerTilingSet> tilings_;
 136   scoped_refptr<RasterSource> raster_source_;
 137   Region invalidation_;
 138
 139   float ideal_page_scale_;
 140   float ideal_device_scale_;
 141   float ideal_source_scale_;
 142   float ideal_contents_scale_;
 143
 144   float raster_page_scale_;
 145   float raster_device_scale_;
 146   float raster_source_scale_;
 147   float raster_contents_scale_;
 148   float low_res_raster_contents_scale_;
 149
 150   bool raster_source_scale_is_fixed_;
 151   bool was_screen_space_transform_animating_;
 152   bool only_used_low_res_last_append_quads_;
 153   const bool is_mask_;
 154
 155   bool nearest_neighbor_;
 156
 157   // Any draw properties derived from |transform|, |viewport|, and |clip|
 158   // parameters in LayerTreeHostImpl::SetExternalDrawConstraints are not valid
 159   // for prioritizing tiles during resourceless software draws. This is because
 160   // resourceless software draws can have wildly different transforms/viewports
 161   // from regular draws. Save a copy of the required draw properties of the last
 162   // frame that has a valid viewport for prioritizing tiles.
 163   gfx::Rect visible_rect_for_tile_priority_;
 164   gfx::Rect viewport_rect_for_tile_priority_in_content_space_;
 165
 166   gfx::Size gpu_raster_max_texture_size_;
 167
 168   // List of tilings that were used last time we appended quads. This can be
 169   // used as an optimization not to remove tilings if they are still being
 170   // drawn. Note that accessing this vector should only be done in the context
 171   // of comparing pointers, since objects pointed to are not guaranteed to
 172   // exist.
 173   std::vector<PictureLayerTiling*> last_append_quads_tilings_;
 174
 175   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 176 };
 177
 178 }  // namespace cc
 179
 180 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_