Home | History | Annotate | Download | only in resources 
      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 SetTilingRect(const gfx::Rect& tiling_rect);
     33   gfx::Rect tiling_rect() const { return tiling_.tiling_rect(); }
     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   bool CanRaster(float contents_scale, const gfx::Rect& content_rect);
     46 
     47   // If this pile contains any valid recordings. May have false positives.
     48   bool HasRecordings() const { return has_any_recordings_; }
     49 
     50   static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
     51                                   SkTileGridFactory::TileGridInfo* info);
     52 
     53   void SetTileGridSize(const gfx::Size& tile_grid_size);
     54   TilingData& tiling() { return tiling_; }
     55 
     56   scoped_ptr<base::Value> AsValue() const;
     57 
     58  protected:
     59   class CC_EXPORT PictureInfo {
     60    public:
     61     enum {
     62       INVALIDATION_FRAMES_TRACKED = 32
     63     };
     64 
     65     PictureInfo();
     66     ~PictureInfo();
     67 
     68     bool Invalidate(int frame_number);
     69     bool NeedsRecording(int frame_number, int distance_to_visible);
     70     PictureInfo CloneForThread(int thread_index) const;
     71     void SetPicture(scoped_refptr<Picture> picture);
     72     Picture* GetPicture() const;
     73 
     74     float GetInvalidationFrequencyForTesting() const {
     75       return GetInvalidationFrequency();
     76     }
     77 
     78    private:
     79     void AdvanceInvalidationHistory(int frame_number);
     80     float GetInvalidationFrequency() const;
     81 
     82     int last_frame_number_;
     83     scoped_refptr<Picture> picture_;
     84     std::bitset<INVALIDATION_FRAMES_TRACKED> invalidation_history_;
     85   };
     86 
     87   typedef std::pair<int, int> PictureMapKey;
     88   typedef base::hash_map<PictureMapKey, PictureInfo> PictureMap;
     89 
     90   virtual ~PicturePileBase();
     91 
     92   int buffer_pixels() const { return tiling_.border_texels(); }
     93   void Clear();
     94 
     95   gfx::Rect PaddedRect(const PictureMapKey& key);
     96   gfx::Rect PadRect(const gfx::Rect& rect);
     97 
     98   // An internal CanRaster check that goes to the picture_map rather than
     99   // using the recorded_viewport hint.
    100   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
    101 
    102   // A picture pile is a tiled set of pictures. The picture map is a map of tile
    103   // indices to picture infos.
    104   PictureMap picture_map_;
    105   TilingData tiling_;
    106   gfx::Rect recorded_viewport_;
    107   float min_contents_scale_;
    108   SkTileGridFactory::TileGridInfo tile_grid_info_;
    109   SkColor background_color_;
    110   int slow_down_raster_scale_factor_for_debug_;
    111   bool contents_opaque_;
    112   bool contents_fill_bounds_completely_;
    113   bool show_debug_picture_borders_;
    114   bool clear_canvas_with_debug_color_;
    115   // A hint about whether there are any recordings. This may be a false
    116   // positive.
    117   bool has_any_recordings_;
    118 
    119  private:
    120   void SetBufferPixels(int buffer_pixels);
    121 
    122   friend class base::RefCounted<PicturePileBase>;
    123   DISALLOW_COPY_AND_ASSIGN(PicturePileBase);
    124 };
    125 
    126 }  // namespace cc
    127 
    128 #endif  // CC_RESOURCES_PICTURE_PILE_BASE_H_
    129