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
  35   // RasterSource overrides. See RasterSource header for full description.
  36   // When slow-down-raster-scale-factor is set to a value greater than 1, the
  37   // reported rasterize time (in stats_instrumentation) is the minimum measured
  38   // value over all runs.
  39   void PlaybackToCanvas(SkCanvas* canvas,
  40                         const gfx::Rect& canvas_rect,
  41                         float contents_scale) const override;
  42   void PlaybackToSharedCanvas(SkCanvas* canvas,
  43                               const gfx::Rect& canvas_rect,
  44                               float contents_scale) const override;
  45   void PerformSolidColorAnalysis(
  46       const gfx::Rect& content_rect,
  47       float contents_scale,
  48       RasterSource::SolidColorAnalysis* analysis) const override;
  49   void GatherPixelRefs(const gfx::Rect& content_rect,
  50                        float contents_scale,
  51                        std::vector<SkPixelRef*>* pixel_refs) const override;
  52   bool CoversRect(const gfx::Rect& content_rect,
  53                   float contents_scale) const override;
  54   void SetShouldAttemptToUseDistanceFieldText() override;
  55   void SetBackgoundColor(SkColor background_color) override;
  56   void SetRequiresClear(bool requires_clear) 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
  64   // Tracing functionality.
  65   void DidBeginTracing() override;
  66   void AsValueInto(base::debug::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);
 105   ~PicturePileImpl() override;
 106
 107   int buffer_pixels() const { return tiling_.border_texels(); }
 108
 109   PictureMap picture_map_;
 110   TilingData tiling_;
 111   SkColor background_color_;
 112   bool requires_clear_;
 113   bool can_use_lcd_text_;
 114   bool is_solid_color_;
 115   SkColor solid_color_;
 116   gfx::Rect recorded_viewport_;
 117   bool has_any_recordings_;
 118   bool clear_canvas_with_debug_color_;
 119   float min_contents_scale_;
 120   int slow_down_raster_scale_factor_for_debug_;
 121
 122  private:
 123   typedef std::map<const Picture*, Region> PictureRegionMap;
 124
 125   // Called when analyzing a tile. We can use AnalysisCanvas as
 126   // SkDrawPictureCallback, which allows us to early out from analysis.
 127   void RasterForAnalysis(skia::AnalysisCanvas* canvas,
 128                          const gfx::Rect& canvas_rect,
 129                          float contents_scale) const;
 130
 131   void CoalesceRasters(const gfx::Rect& canvas_rect,
 132                        const gfx::Rect& content_rect,
 133                        float contents_scale,
 134                        PictureRegionMap* result) const;
 135
 136   void RasterCommon(
 137       SkCanvas* canvas,
 138       SkDrawPictureCallback* callback,
 139       const gfx::Rect& canvas_rect,
 140       float contents_scale,
 141       bool is_analysis) const;
 142
 143   // An internal CanRaster check that goes to the picture_map rather than
 144   // using the recorded_viewport hint.
 145   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
 146
 147   gfx::Rect PaddedRect(const PictureMapKey& key) const;
 148
 149   bool should_attempt_to_use_distance_field_text_;
 150
 151   DISALLOW_COPY_AND_ASSIGN(PicturePileImpl);
 152 };
 153
 154 }  // namespace cc
 155
 156 #endif  // CC_RESOURCES_PICTURE_PILE_IMPL_H_