cc/resources/picture_pile_base.h

   1 // Copyright 2013 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_BASE_H_
   6 #define CC_RESOURCES_PICTURE_PILE_BASE_H_
   7
   8 #include <bitset>
   9 #include <list>
  10 #include <utility>
  11
  12 #include "base/containers/hash_tables.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "cc/base/cc_export.h"
  15 #include "cc/base/region.h"
  16 #include "cc/base/tiling_data.h"
  17 #include "cc/resources/picture.h"
  18 #include "ui/gfx/geometry/size.h"
  19
  20 namespace base {
  21 namespace debug {
  22 class TracedValue;
  23 }
  24 class Value;
  25 }
  26
  27 namespace cc {
  28
  29 class CC_EXPORT PicturePileBase
  30     : public base::RefCountedThreadSafe<PicturePileBase> {
  31  public:
  32   PicturePileBase();
  33   explicit PicturePileBase(const PicturePileBase* other);
  34
  35   gfx::Size tiling_size() const { return tiling_.tiling_size(); }
  36   void SetMinContentsScale(float min_contents_scale);
  37
  38   // If non-empty, all pictures tiles inside this rect are recorded. There may
  39   // be recordings outside this rect, but everything inside the rect is
  40   // recorded.
  41   gfx::Rect recorded_viewport() const { return recorded_viewport_; }
  42
  43   int num_tiles_x() const { return tiling_.num_tiles_x(); }
  44   int num_tiles_y() const { return tiling_.num_tiles_y(); }
  45   gfx::Rect tile_bounds(int x, int y) const { return tiling_.TileBounds(x, y); }
  46   bool HasRecordingAt(int x, int y);
  47   bool CanRaster(float contents_scale, const gfx::Rect& content_rect);
  48
  49   // If this pile contains any valid recordings. May have false positives.
  50   bool HasRecordings() const { return has_any_recordings_; }
  51
  52   // If this pile has ever contained any recordings with text.
  53   bool has_text() const { return has_text_; }
  54
  55   bool is_solid_color() const { return is_solid_color_; }
  56   SkColor solid_color() const { return solid_color_; }
  57
  58   void set_is_mask(bool is_mask) { is_mask_ = is_mask; }
  59   bool is_mask() const { return is_mask_; }
  60
  61   static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
  62                                   SkTileGridFactory::TileGridInfo* info);
  63
  64   void SetTileGridSize(const gfx::Size& tile_grid_size);
  65   TilingData& tiling() { return tiling_; }
  66
  67   void AsValueInto(base::debug::TracedValue* array) const;
  68
  69   SkTileGridFactory::TileGridInfo GetTileGridInfoForTesting() const {
  70     return tile_grid_info_;
  71   }
  72
  73  protected:
  74   class CC_EXPORT PictureInfo {
  75    public:
  76     enum {
  77       INVALIDATION_FRAMES_TRACKED = 32
  78     };
  79
  80     PictureInfo();
  81     ~PictureInfo();
  82
  83     bool Invalidate(int frame_number);
  84     bool NeedsRecording(int frame_number, int distance_to_visible);
  85     void SetPicture(scoped_refptr<Picture> picture);
  86     const Picture* GetPicture() const;
  87
  88     float GetInvalidationFrequencyForTesting() const {
  89       return GetInvalidationFrequency();
  90     }
  91
  92    private:
  93     void AdvanceInvalidationHistory(int frame_number);
  94     float GetInvalidationFrequency() const;
  95
  96     int last_frame_number_;
  97     scoped_refptr<const Picture> picture_;
  98     std::bitset<INVALIDATION_FRAMES_TRACKED> invalidation_history_;
  99   };
 100
 101   typedef std::pair<int, int> PictureMapKey;
 102   typedef base::hash_map<PictureMapKey, PictureInfo> PictureMap;
 103
 104   virtual ~PicturePileBase();
 105
 106   int buffer_pixels() const { return tiling_.border_texels(); }
 107   void Clear();
 108
 109   gfx::Rect PaddedRect(const PictureMapKey& key) const;
 110   gfx::Rect PadRect(const gfx::Rect& rect) const;
 111
 112   // An internal CanRaster check that goes to the picture_map rather than
 113   // using the recorded_viewport hint.
 114   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
 115
 116   // A picture pile is a tiled set of pictures. The picture map is a map of tile
 117   // indices to picture infos.
 118   PictureMap picture_map_;
 119   TilingData tiling_;
 120   gfx::Rect recorded_viewport_;
 121   float min_contents_scale_;
 122   SkTileGridFactory::TileGridInfo tile_grid_info_;
 123   SkColor background_color_;
 124   int slow_down_raster_scale_factor_for_debug_;
 125   bool contents_opaque_;
 126   bool contents_fill_bounds_completely_;
 127   bool show_debug_picture_borders_;
 128   bool clear_canvas_with_debug_color_;
 129   // A hint about whether there are any recordings. This may be a false
 130   // positive.
 131   bool has_any_recordings_;
 132   bool has_text_;
 133   bool is_mask_;
 134   bool is_solid_color_;
 135   SkColor solid_color_;
 136
 137  private:
 138   void SetBufferPixels(int buffer_pixels);
 139
 140   friend class base::RefCountedThreadSafe<PicturePileBase>;
 141   DISALLOW_COPY_AND_ASSIGN(PicturePileBase);
 142 };
 143
 144 }  // namespace cc
 145
 146 #endif  // CC_RESOURCES_PICTURE_PILE_BASE_H_