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