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/picture_pile.h"
  16 #include "cc/playback/pixel_ref_map.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 class SkPixelRef;
  24
  25 namespace gfx {
  26 class Rect;
  27 }
  28
  29 namespace cc {
  30
  31 class CC_EXPORT PicturePileImpl : public RasterSource {
  32  public:
  33   static scoped_refptr<PicturePileImpl> CreateFromPicturePile(
  34       const PicturePile* other,
  35       bool can_use_lcd_text);
  36
  37   // RasterSource overrides. See RasterSource header for full description.
  38   // When slow-down-raster-scale-factor is set to a value greater than 1, the
  39   // reported rasterize time (in stats_instrumentation) is the minimum measured
  40   // value over all runs.
  41   void PlaybackToCanvas(SkCanvas* canvas,
  42                         const gfx::Rect& canvas_bitmap_rect,
  43                         const gfx::Rect& canvas_playback_rect,
  44                         float contents_scale) const override;
  45   void PlaybackToSharedCanvas(SkCanvas* canvas,
  46                               const gfx::Rect& canvas_rect,
  47                               float contents_scale) const override;
  48   void PerformSolidColorAnalysis(
  49       const gfx::Rect& content_rect,
  50       float contents_scale,
  51       RasterSource::SolidColorAnalysis* analysis) const override;
  52   void GatherPixelRefs(
  53       const gfx::Rect& layer_rect,
  54       std::vector<skia::PositionPixelRef>* pixel_refs) const override;
  55   bool CoversRect(const gfx::Rect& layer_rect) const override;
  56   void SetShouldAttemptToUseDistanceFieldText() override;
  57   bool ShouldAttemptToUseDistanceFieldText() const override;
  58   gfx::Size GetSize() const override;
  59   bool IsSolidColor() const override;
  60   SkColor GetSolidColor() const override;
  61   bool HasRecordings() 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 SkPixelRefs from this picture pile.
  72   // Public for testing.
  73   class CC_EXPORT PixelRefIterator {
  74    public:
  75     PixelRefIterator(const gfx::Rect& layer_rect,
  76                      const PicturePileImpl* picture_pile);
  77     ~PixelRefIterator();
  78
  79     const skia::PositionPixelRef* operator->() const {
  80       return &(*pixel_ref_iterator_);
  81     }
  82     const skia::PositionPixelRef& operator*() const {
  83       return *pixel_ref_iterator_;
  84     }
  85     PixelRefIterator& operator++();
  86     operator bool() const { return pixel_ref_iterator_; }
  87
  88    private:
  89     void AdvanceToTilePictureWithPixelRefs();
  90
  91     const PicturePileImpl* picture_pile_;
  92     gfx::Rect layer_rect_;
  93     TilingData::Iterator tile_iterator_;
  94     PixelRefMap::Iterator pixel_ref_iterator_;
  95     std::set<const void*> processed_pictures_;
  96   };
  97
  98  protected:
  99   friend class PicturePile;
 100   friend class PixelRefIterator;
 101
 102   using PictureMapKey = PicturePile::PictureMapKey;
 103   using PictureMap = PicturePile::PictureMap;
 104
 105   PicturePileImpl();
 106   explicit PicturePileImpl(const PicturePile* other, bool can_use_lcd_text);
 107   explicit PicturePileImpl(const PicturePileImpl* other, bool can_use_lcd_text);
 108   ~PicturePileImpl() override;
 109
 110   int buffer_pixels() const { return tiling_.border_texels(); }
 111
 112   // These members are const as this raster source may be in use on another
 113   // thread and so should not be touched after construction.
 114   const PictureMap picture_map_;
 115   const TilingData tiling_;
 116   const SkColor background_color_;
 117   const bool requires_clear_;
 118   const bool can_use_lcd_text_;
 119   const bool is_solid_color_;
 120   const SkColor solid_color_;
 121   const gfx::Rect recorded_viewport_;
 122   const bool has_any_recordings_;
 123   const bool clear_canvas_with_debug_color_;
 124   const float min_contents_scale_;
 125   const int slow_down_raster_scale_factor_for_debug_;
 126   // TODO(enne/vmiura): this has a read/write race between raster and compositor
 127   // threads with multi-threaded Ganesh.  Make this const or remove it.
 128   bool should_attempt_to_use_distance_field_text_;
 129
 130   size_t picture_memory_usage_;
 131
 132  private:
 133   typedef std::map<const Picture*, Region> PictureRegionMap;
 134
 135   // Called when analyzing a tile. We can use AnalysisCanvas as
 136   // SkPicture::AbortCallback, which allows us to early out from analysis.
 137   void RasterForAnalysis(skia::AnalysisCanvas* canvas,
 138                          const gfx::Rect& canvas_rect,
 139                          float contents_scale) const;
 140
 141   void CoalesceRasters(const gfx::Rect& canvas_rect,
 142                        const gfx::Rect& content_rect,
 143                        float contents_scale,
 144                        PictureRegionMap* result) const;
 145
 146   void RasterCommon(SkCanvas* canvas,
 147                     SkPicture::AbortCallback* callback,
 148                     const gfx::Rect& canvas_rect,
 149                     float contents_scale) const;
 150
 151   // An internal CanRaster check that goes to the picture_map rather than
 152   // using the recorded_viewport hint.
 153   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
 154
 155   gfx::Rect PaddedRect(const PictureMapKey& key) const;
 156
 157   DISALLOW_COPY_AND_ASSIGN(PicturePileImpl);
 158 };
 159
 160 }  // namespace cc
 161
 162 #endif  // CC_PLAYBACK_PICTURE_PILE_IMPL_H_