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& content_rect,
  54       float contents_scale,
  55       std::vector<skia::PositionPixelRef>* pixel_refs) const override;
  56   bool CoversRect(const gfx::Rect& content_rect,
  57                   float contents_scale) const override;
  58   void SetShouldAttemptToUseDistanceFieldText() override;
  59   bool ShouldAttemptToUseDistanceFieldText() const override;
  60   gfx::Size GetSize() const override;
  61   bool IsSolidColor() const override;
  62   SkColor GetSolidColor() const override;
  63   bool HasRecordings() const override;
  64   bool CanUseLCDText() const override;
  65   scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const override;
  66
  67   // Tracing functionality.
  68   void DidBeginTracing() override;
  69   void AsValueInto(base::trace_event::TracedValue* array) const override;
  70   skia::RefPtr<SkPicture> GetFlattenedPicture() override;
  71   size_t GetPictureMemoryUsage() const override;
  72
  73   // Iterator used to return SkPixelRefs from this picture pile.
  74   // Public for testing.
  75   class CC_EXPORT PixelRefIterator {
  76    public:
  77     PixelRefIterator(const gfx::Rect& content_rect,
  78                      float contents_scale,
  79                      const PicturePileImpl* picture_pile);
  80     ~PixelRefIterator();
  81
  82     const skia::PositionPixelRef* operator->() const {
  83       return &(*pixel_ref_iterator_);
  84     }
  85     const skia::PositionPixelRef& operator*() const {
  86       return *pixel_ref_iterator_;
  87     }
  88     PixelRefIterator& operator++();
  89     operator bool() const { return pixel_ref_iterator_; }
  90
  91    private:
  92     void AdvanceToTilePictureWithPixelRefs();
  93
  94     const PicturePileImpl* picture_pile_;
  95     gfx::Rect layer_rect_;
  96     TilingData::Iterator tile_iterator_;
  97     PixelRefMap::Iterator pixel_ref_iterator_;
  98     std::set<const void*> processed_pictures_;
  99   };
 100
 101  protected:
 102   friend class PicturePile;
 103   friend class PixelRefIterator;
 104
 105   using PictureMapKey = PicturePile::PictureMapKey;
 106   using PictureMap = PicturePile::PictureMap;
 107
 108   PicturePileImpl();
 109   explicit PicturePileImpl(const PicturePile* other, bool can_use_lcd_text);
 110   explicit PicturePileImpl(const PicturePileImpl* other, bool can_use_lcd_text);
 111   ~PicturePileImpl() override;
 112
 113   int buffer_pixels() const { return tiling_.border_texels(); }
 114
 115   // These members are const as this raster source may be in use on another
 116   // thread and so should not be touched after construction.
 117   const PictureMap picture_map_;
 118   const TilingData tiling_;
 119   const SkColor background_color_;
 120   const bool requires_clear_;
 121   const bool can_use_lcd_text_;
 122   const bool is_solid_color_;
 123   const SkColor solid_color_;
 124   const gfx::Rect recorded_viewport_;
 125   const bool has_any_recordings_;
 126   const bool clear_canvas_with_debug_color_;
 127   const float min_contents_scale_;
 128   const int slow_down_raster_scale_factor_for_debug_;
 129   // TODO(enne/vmiura): this has a read/write race between raster and compositor
 130   // threads with multi-threaded Ganesh.  Make this const or remove it.
 131   bool should_attempt_to_use_distance_field_text_;
 132
 133   size_t picture_memory_usage_;
 134
 135  private:
 136   typedef std::map<const Picture*, Region> PictureRegionMap;
 137
 138   // Called when analyzing a tile. We can use AnalysisCanvas as
 139   // SkPicture::AbortCallback, which allows us to early out from analysis.
 140   void RasterForAnalysis(skia::AnalysisCanvas* canvas,
 141                          const gfx::Rect& canvas_rect,
 142                          float contents_scale) const;
 143
 144   void CoalesceRasters(const gfx::Rect& canvas_rect,
 145                        const gfx::Rect& content_rect,
 146                        float contents_scale,
 147                        PictureRegionMap* result) const;
 148
 149   void RasterCommon(SkCanvas* canvas,
 150                     SkPicture::AbortCallback* callback,
 151                     const gfx::Rect& canvas_rect,
 152                     float contents_scale) const;
 153
 154   // An internal CanRaster check that goes to the picture_map rather than
 155   // using the recorded_viewport hint.
 156   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
 157
 158   gfx::Rect PaddedRect(const PictureMapKey& key) const;
 159
 160   DISALLOW_COPY_AND_ASSIGN(PicturePileImpl);
 161 };
 162
 163 }  // namespace cc
 164
 165 #endif  // CC_PLAYBACK_PICTURE_PILE_IMPL_H_