cc/resources/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_RESOURCES_PICTURE_PILE_IMPL_H_
   6 #define CC_RESOURCES_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/resources/picture_pile.h"
  16 #include "cc/resources/raster_source.h"
  17 #include "skia/ext/analysis_canvas.h"
  18 #include "skia/ext/refptr.h"
  19
  20 class SkCanvas;
  21 class SkPicture;
  22 class SkPixelRef;
  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_rect,
  42                         float contents_scale) const override;
  43   void PlaybackToSharedCanvas(SkCanvas* canvas,
  44                               const gfx::Rect& canvas_rect,
  45                               float contents_scale) const override;
  46   void PerformSolidColorAnalysis(
  47       const gfx::Rect& content_rect,
  48       float contents_scale,
  49       RasterSource::SolidColorAnalysis* analysis) const override;
  50   void GatherPixelRefs(const gfx::Rect& content_rect,
  51                        float contents_scale,
  52                        std::vector<SkPixelRef*>* pixel_refs) const override;
  53   bool CoversRect(const gfx::Rect& content_rect,
  54                   float contents_scale) 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   bool CanUseLCDText() const override;
  62   scoped_refptr<RasterSource> CreateCloneWithoutLCDText() const override;
  63
  64   // Tracing functionality.
  65   void DidBeginTracing() override;
  66   void AsValueInto(base::trace_event::TracedValue* array) const override;
  67   skia::RefPtr<SkPicture> GetFlattenedPicture() override;
  68   size_t GetPictureMemoryUsage() const override;
  69
  70   // Iterator used to return SkPixelRefs from this picture pile.
  71   // Public for testing.
  72   class CC_EXPORT PixelRefIterator {
  73    public:
  74     PixelRefIterator(const gfx::Rect& content_rect,
  75                      float contents_scale,
  76                      const PicturePileImpl* picture_pile);
  77     ~PixelRefIterator();
  78
  79     SkPixelRef* operator->() const { return *pixel_ref_iterator_; }
  80     SkPixelRef* operator*() const { return *pixel_ref_iterator_; }
  81     PixelRefIterator& operator++();
  82     operator bool() const { return pixel_ref_iterator_; }
  83
  84    private:
  85     void AdvanceToTilePictureWithPixelRefs();
  86
  87     const PicturePileImpl* picture_pile_;
  88     gfx::Rect layer_rect_;
  89     TilingData::Iterator tile_iterator_;
  90     Picture::PixelRefIterator pixel_ref_iterator_;
  91     std::set<const void*> processed_pictures_;
  92   };
  93
  94  protected:
  95   friend class PicturePile;
  96   friend class PixelRefIterator;
  97
  98   // TODO(vmpstr): Change this when pictures are split from invalidation info.
  99   using PictureMapKey = PicturePile::PictureMapKey;
 100   using PictureMap = PicturePile::PictureMap;
 101   using PictureInfo = PicturePile::PictureInfo;
 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  private:
 129   typedef std::map<const Picture*, Region> PictureRegionMap;
 130
 131   // Called when analyzing a tile. We can use AnalysisCanvas as
 132   // SkDrawPictureCallback, which allows us to early out from analysis.
 133   void RasterForAnalysis(skia::AnalysisCanvas* canvas,
 134                          const gfx::Rect& canvas_rect,
 135                          float contents_scale) const;
 136
 137   void CoalesceRasters(const gfx::Rect& canvas_rect,
 138                        const gfx::Rect& content_rect,
 139                        float contents_scale,
 140                        PictureRegionMap* result) const;
 141
 142   void RasterCommon(
 143       SkCanvas* canvas,
 144       SkDrawPictureCallback* callback,
 145       const gfx::Rect& canvas_rect,
 146       float contents_scale,
 147       bool is_analysis) 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_RESOURCES_PICTURE_PILE_IMPL_H_