src/cc/resources/tile.h

   1 // Copyright 2012 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_TILE_H_
   6 #define CC_RESOURCES_TILE_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/scoped_vector.h"
  11 #include "cc/base/ref_counted_managed.h"
  12 #include "cc/resources/managed_tile_state.h"
  13 #include "cc/resources/picture_pile_impl.h"
  14 #include "cc/resources/raster_mode.h"
  15 #include "cc/resources/tile_priority.h"
  16 #include "ui/gfx/rect.h"
  17 #include "ui/gfx/size.h"
  18
  19 namespace cc {
  20
  21 class CC_EXPORT Tile : public RefCountedManaged<Tile> {
  22  public:
  23   enum TileRasterFlags { USE_PICTURE_ANALYSIS = 1 << 0 };
  24
  25   typedef uint64 Id;
  26
  27   Id id() const {
  28     return id_;
  29   }
  30
  31   PicturePileImpl* picture_pile() {
  32     return picture_pile_.get();
  33   }
  34
  35   const PicturePileImpl* picture_pile() const {
  36     return picture_pile_.get();
  37   }
  38
  39   const TilePriority& priority(WhichTree tree) const {
  40     return priority_[tree];
  41   }
  42
  43   TilePriority priority_for_tree_priority(TreePriority tree_priority) const {
  44     switch (tree_priority) {
  45       case SMOOTHNESS_TAKES_PRIORITY:
  46         return priority_[ACTIVE_TREE];
  47       case NEW_CONTENT_TAKES_PRIORITY:
  48         return priority_[PENDING_TREE];
  49       case SAME_PRIORITY_FOR_BOTH_TREES:
  50         return combined_priority();
  51     }
  52     NOTREACHED();
  53     return TilePriority();
  54   }
  55
  56   TilePriority combined_priority() const {
  57     return TilePriority(priority_[ACTIVE_TREE],
  58                         priority_[PENDING_TREE]);
  59   }
  60
  61   void SetPriority(WhichTree tree, const TilePriority& priority);
  62
  63   void MarkRequiredForActivation();
  64
  65   bool required_for_activation() const {
  66     return priority_[PENDING_TREE].required_for_activation;
  67   }
  68
  69   bool use_picture_analysis() const {
  70     return !!(flags_ & USE_PICTURE_ANALYSIS);
  71   }
  72
  73   bool NeedsRasterForMode(RasterMode mode) const {
  74     return !managed_state_.tile_versions[mode].IsReadyToDraw();
  75   }
  76
  77   bool HasResources() const {
  78     for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
  79       if (managed_state_.tile_versions[mode].has_resource())
  80         return true;
  81     }
  82     return false;
  83   }
  84
  85   scoped_ptr<base::Value> AsValue() const;
  86
  87   inline bool IsReadyToDraw() const {
  88     for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
  89       if (managed_state_.tile_versions[mode].IsReadyToDraw())
  90         return true;
  91     }
  92     return false;
  93   }
  94
  95   const ManagedTileState::TileVersion& GetTileVersionForDrawing() const {
  96     for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
  97       if (managed_state_.tile_versions[mode].IsReadyToDraw())
  98         return managed_state_.tile_versions[mode];
  99     }
 100     return managed_state_.tile_versions[HIGH_QUALITY_RASTER_MODE];
 101   }
 102
 103   gfx::Rect opaque_rect() const { return opaque_rect_; }
 104   float contents_scale() const { return contents_scale_; }
 105   gfx::Rect content_rect() const { return content_rect_; }
 106
 107   int layer_id() const { return layer_id_; }
 108
 109   int source_frame_number() const { return source_frame_number_; }
 110
 111   void set_picture_pile(scoped_refptr<PicturePileImpl> pile) {
 112     DCHECK(pile->CanRaster(contents_scale_, content_rect_));
 113     picture_pile_ = pile;
 114   }
 115
 116   size_t GPUMemoryUsageInBytes() const;
 117
 118   gfx::Size size() const { return tile_size_.size(); }
 119
 120   RasterMode DetermineRasterModeForTree(WhichTree tree) const;
 121   RasterMode DetermineOverallRasterMode() const;
 122
 123   // Functionality used in tests.
 124   RasterMode GetRasterModeForTesting() const {
 125     return managed_state().raster_mode;
 126   }
 127   ManagedTileState::TileVersion& GetTileVersionForTesting(RasterMode mode) {
 128     return managed_state_.tile_versions[mode];
 129   }
 130
 131  private:
 132   friend class TileManager;
 133   friend class PrioritizedTileSet;
 134   friend class FakeTileManager;
 135   friend class BinComparator;
 136   friend class FakePictureLayerImpl;
 137
 138   // Methods called by by tile manager.
 139   Tile(TileManager* tile_manager,
 140        PicturePileImpl* picture_pile,
 141        const gfx::Size& tile_size,
 142        const gfx::Rect& content_rect,
 143        const gfx::Rect& opaque_rect,
 144        float contents_scale,
 145        int layer_id,
 146        int source_frame_number,
 147        int flags);
 148   ~Tile();
 149
 150   ManagedTileState& managed_state() { return managed_state_; }
 151   const ManagedTileState& managed_state() const { return managed_state_; }
 152   RasterMode DetermineRasterModeForResolution(TileResolution resolution) const;
 153
 154   TileManager* tile_manager_;
 155   scoped_refptr<PicturePileImpl> picture_pile_;
 156   gfx::Rect tile_size_;
 157   gfx::Rect content_rect_;
 158   float contents_scale_;
 159   gfx::Rect opaque_rect_;
 160
 161   TilePriority priority_[NUM_TREES];
 162   ManagedTileState managed_state_;
 163   int layer_id_;
 164   int source_frame_number_;
 165   int flags_;
 166
 167   Id id_;
 168   static Id s_next_id_;
 169
 170   DISALLOW_COPY_AND_ASSIGN(Tile);
 171 };
 172
 173 }  // namespace cc
 174
 175 #endif  // CC_RESOURCES_TILE_H_