cc/playback/picture_pile_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_PLAYBACK_PICTURE_PILE_IMPL_H_
   6 #define CC_PLAYBACK_PICTURE_PILE_IMPL_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <vector>
  11
  12 #include "base/time/time.h"
  13 #include "cc/base/cc_export.h"
  14 #include "cc/debug/rendering_stats_instrumentation.h"
  15 #include "cc/playback/discardable_image_map.h"
  16 #include "cc/playback/picture_pile.h"
  17 #include "cc/playback/raster_source.h"
  18 #include "skia/ext/analysis_canvas.h"
  19 #include "skia/ext/refptr.h"
  20
  21 class SkCanvas;
  22 class SkPicture;
  23
  24 namespace gfx {
  25 class Rect;
  26 }
  27
  28 namespace cc {
  29
  30 class CC_EXPORT PicturePileImpl : public RasterSource {
  31  public:
  32   static scoped_refptr<PicturePileImpl> CreateFromPicturePile(
  33       const PicturePile* other,
  34       bool can_use_lcd_text);
  35
  36   // RasterSource overrides. See RasterSource header for full description.
  37   // When slow-down-raster-scale-factor is set to a value greater than 1, the
  38   // reported rasterize time (in stats_instrumentation) is the minimum measured
  39   // value over all runs.
  40   void PlaybackToCanvas(SkCanvas* canvas,
  41                         const gfx::Rect& canvas_bitmap_rect,
  42                         const gfx::Rect& canvas_playback_rect,
  43                         float contents_scale) const override;
  44   void PlaybackToSharedCanvas(SkCanvas* canvas,
  45                               const gfx::Rect& canvas_rect,
  46                               float contents_scale) const override;
  47   void PerformSolidColorAnalysis(
  48       const gfx::Rect& content_rect,
  49       float contents_scale,
  50       RasterSource::SolidColorAnalysis* analysis) const override;
  51   void GatherDiscardableImages(
  52       const gfx::Rect& layer_rect,
  53       std::vector<skia::PositionImage>* images) const override;
  54   bool CoversRect(const gfx::Rect& layer_rect) const override;
  55   void SetShouldAttemptToUseDistanceFieldText() override;
  56   bool ShouldAttemptToUseDistanceFieldText() const override;
  57   gfx::Size GetSize() const override;
  58   bool IsSolidColor() const override;
  59   SkColor GetSolidColor() const override;
  60   bool HasRecordings() const override;
  61   gfx::Rect RecordedViewport() const override;
  62   bool CanUseLCDText() const override;
  63   scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const override;
  64
  65   // Tracing functionality.
  66   void DidBeginTracing() override;
  67   void AsValueInto(base::trace_event::TracedValue* array) const override;
  68   skia::RefPtr<SkPicture> GetFlattenedPicture() override;
  69   size_t GetPictureMemoryUsage() const override;
  70
  71   // Iterator used to return SkImages from this picture pile.
  72   // Public for testing.
  73   class CC_EXPORT ImageIterator {
  74    public:
  75     ImageIterator(const gfx::Rect& layer_rect,
  76                   const PicturePileImpl* picture_pile);
  77     ~ImageIterator();
  78
  79     const skia::PositionImage* operator->() const {
  80       return &(*image_iterator_);
  81     }
  82     const skia::PositionImage& operator*() const { return *image_iterator_; }
  83     ImageIterator& operator++();
  84     operator bool() const { return image_iterator_; }
  85
  86    private:
  87     void AdvanceToTilePictureWithImages();
  88
  89     const PicturePileImpl* picture_pile_;
  90     gfx::Rect layer_rect_;
  91     TilingData::Iterator tile_iterator_;
  92     DiscardableImageMap::Iterator image_iterator_;
  93     std::set<const void*> processed_pictures_;
  94   };
  95
  96  protected:
  97   friend class PicturePile;
  98   friend class ImageIterator;
  99
 100   using PictureMapKey = PicturePile::PictureMapKey;
 101   using PictureMap = PicturePile::PictureMap;
 102
 103   PicturePileImpl();
 104   explicit PicturePileImpl(const PicturePile* other, bool can_use_lcd_text);
 105   explicit PicturePileImpl(const PicturePileImpl* other, bool can_use_lcd_text);
 106   ~PicturePileImpl() override;
 107
 108   int buffer_pixels() const { return tiling_.border_texels(); }
 109
 110   // These members are const as this raster source may be in use on another
 111   // thread and so should not be touched after construction.
 112   const PictureMap picture_map_;
 113   const TilingData tiling_;
 114   const SkColor background_color_;
 115   const bool requires_clear_;
 116   const bool can_use_lcd_text_;
 117   const bool is_solid_color_;
 118   const SkColor solid_color_;
 119   const gfx::Rect recorded_viewport_;
 120   const bool has_any_recordings_;
 121   const bool clear_canvas_with_debug_color_;
 122   const float min_contents_scale_;
 123   const int slow_down_raster_scale_factor_for_debug_;
 124   // TODO(enne/vmiura): this has a read/write race between raster and compositor
 125   // threads with multi-threaded Ganesh.  Make this const or remove it.
 126   bool should_attempt_to_use_distance_field_text_;
 127
 128   size_t picture_memory_usage_;
 129
 130  private:
 131   typedef std::map<const Picture*, Region> PictureRegionMap;
 132
 133   // Called when analyzing a tile. We can use AnalysisCanvas as
 134   // SkPicture::AbortCallback, which allows us to early out from analysis.
 135   void RasterForAnalysis(skia::AnalysisCanvas* canvas,
 136                          const gfx::Rect& canvas_rect,
 137                          float contents_scale) const;
 138
 139   void CoalesceRasters(const gfx::Rect& canvas_rect,
 140                        const gfx::Rect& content_rect,
 141                        float contents_scale,
 142                        PictureRegionMap* result) const;
 143
 144   void RasterCommon(SkCanvas* canvas,
 145                     SkPicture::AbortCallback* callback,
 146                     const gfx::Rect& canvas_rect,
 147                     float contents_scale) const;
 148
 149   // An internal CanRaster check that goes to the picture_map rather than
 150   // using the recorded_viewport hint.
 151   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
 152
 153   gfx::Rect PaddedRect(const PictureMapKey& key) const;
 154
 155   DISALLOW_COPY_AND_ASSIGN(PicturePileImpl);
 156 };
 157
 158 }  // namespace cc
 159
 160 #endif  // CC_PLAYBACK_PICTURE_PILE_IMPL_H_