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/size.h"
  19
  20 namespace base {
  21 class Value;
  22 }
  23
  24 namespace cc {
  25
  26 class CC_EXPORT PicturePileBase : public base::RefCounted<PicturePileBase> {
  27  public:
  28   PicturePileBase();
  29   explicit PicturePileBase(const PicturePileBase* other);
  30   PicturePileBase(const PicturePileBase* other, unsigned thread_index);
  31
  32   void Resize(const gfx::Size& size);
  33   gfx::Size size() const { return tiling_.total_size(); }
  34   void SetMinContentsScale(float min_contents_scale);
  35
  36   int num_tiles_x() const { return tiling_.num_tiles_x(); }
  37   int num_tiles_y() const { return tiling_.num_tiles_y(); }
  38   gfx::Rect tile_bounds(int x, int y) const { return tiling_.TileBounds(x, y); }
  39   bool HasRecordingAt(int x, int y);
  40   bool CanRaster(float contents_scale, const gfx::Rect& content_rect);
  41
  42   // If this pile contains any valid recordings. May have false positives.
  43   bool HasRecordings() const { return has_any_recordings_; }
  44
  45   static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
  46                                   SkTileGridPicture::TileGridInfo* info);
  47
  48   void SetTileGridSize(const gfx::Size& tile_grid_size);
  49   TilingData& tiling() { return tiling_; }
  50
  51   scoped_ptr<base::Value> AsValue() const;
  52
  53  protected:
  54   class CC_EXPORT PictureInfo {
  55    public:
  56     enum {
  57       INVALIDATION_FRAMES_TRACKED = 32
  58     };
  59
  60     PictureInfo();
  61     ~PictureInfo();
  62
  63     bool Invalidate(int frame_number);
  64     bool NeedsRecording(int frame_number, int distance_to_visible);
  65     PictureInfo CloneForThread(int thread_index) const;
  66     void SetPicture(scoped_refptr<Picture> picture);
  67     Picture* GetPicture() const;
  68
  69     float GetInvalidationFrequencyForTesting() const {
  70       return GetInvalidationFrequency();
  71     }
  72
  73    private:
  74     void AdvanceInvalidationHistory(int frame_number);
  75     float GetInvalidationFrequency() const;
  76
  77     int last_frame_number_;
  78     scoped_refptr<Picture> picture_;
  79     std::bitset<INVALIDATION_FRAMES_TRACKED> invalidation_history_;
  80   };
  81
  82   typedef std::pair<int, int> PictureMapKey;
  83   typedef base::hash_map<PictureMapKey, PictureInfo> PictureMap;
  84
  85   virtual ~PicturePileBase();
  86
  87   int buffer_pixels() const { return tiling_.border_texels(); }
  88   void Clear();
  89
  90   gfx::Rect PaddedRect(const PictureMapKey& key);
  91   gfx::Rect PadRect(const gfx::Rect& rect);
  92
  93   // An internal CanRaster check that goes to the picture_map rather than
  94   // using the recorded_viewport hint.
  95   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
  96
  97   // A picture pile is a tiled set of pictures. The picture map is a map of tile
  98   // indices to picture infos.
  99   PictureMap picture_map_;
 100   TilingData tiling_;
 101   // If non-empty, all pictures tiles inside this rect are recorded.
 102   gfx::Rect recorded_viewport_;
 103   float min_contents_scale_;
 104   SkTileGridPicture::TileGridInfo tile_grid_info_;
 105   SkColor background_color_;
 106   int slow_down_raster_scale_factor_for_debug_;
 107   bool contents_opaque_;
 108   bool contents_fill_bounds_completely_;
 109   bool show_debug_picture_borders_;
 110   bool clear_canvas_with_debug_color_;
 111   // A hint about whether there are any recordings. This may be a false
 112   // positive.
 113   bool has_any_recordings_;
 114
 115  private:
 116   void SetBufferPixels(int buffer_pixels);
 117
 118   friend class base::RefCounted<PicturePileBase>;
 119   DISALLOW_COPY_AND_ASSIGN(PicturePileBase);
 120 };
 121
 122 }  // namespace cc
 123
 124 #endif  // CC_RESOURCES_PICTURE_PILE_BASE_H_