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