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       default:
  52         NOTREACHED();
  53         return TilePriority();
  54     }
  55   }
  56
  57   TilePriority combined_priority() const {
  58     return TilePriority(priority_[ACTIVE_TREE],
  59                         priority_[PENDING_TREE]);
  60   }
  61
  62   void SetPriority(WhichTree tree, const TilePriority& priority);
  63
  64   void set_is_occluded(WhichTree tree, bool is_occluded) {
  65     is_occluded_[tree] = is_occluded;
  66   }
  67
  68   bool is_occluded(WhichTree tree) const { return is_occluded_[tree]; }
  69
  70   bool is_occluded_for_tree_priority(TreePriority tree_priority) const {
  71     switch (tree_priority) {
  72       case SMOOTHNESS_TAKES_PRIORITY:
  73         return is_occluded_[ACTIVE_TREE];
  74       case NEW_CONTENT_TAKES_PRIORITY:
  75         return is_occluded_[PENDING_TREE];
  76       case SAME_PRIORITY_FOR_BOTH_TREES:
  77         return is_occluded_[ACTIVE_TREE] && is_occluded_[PENDING_TREE];
  78       default:
  79         NOTREACHED();
  80         return false;
  81     }
  82   }
  83
  84   void MarkRequiredForActivation();
  85
  86   bool required_for_activation() const {
  87     return priority_[PENDING_TREE].required_for_activation;
  88   }
  89
  90   bool use_picture_analysis() const {
  91     return !!(flags_ & USE_PICTURE_ANALYSIS);
  92   }
  93
  94   bool NeedsRasterForMode(RasterMode mode) const {
  95     return !managed_state_.tile_versions[mode].IsReadyToDraw();
  96   }
  97
  98   bool HasResources() const {
  99     for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
 100       if (managed_state_.tile_versions[mode].has_resource())
 101         return true;
 102     }
 103     return false;
 104   }
 105
 106   void AsValueInto(base::debug::TracedValue* dict) const;
 107
 108   inline bool IsReadyToDraw() const {
 109     for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
 110       if (managed_state_.tile_versions[mode].IsReadyToDraw())
 111         return true;
 112     }
 113     return false;
 114   }
 115
 116   const ManagedTileState::TileVersion& GetTileVersionForDrawing() const {
 117     for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
 118       if (managed_state_.tile_versions[mode].IsReadyToDraw())
 119         return managed_state_.tile_versions[mode];
 120     }
 121     return managed_state_.tile_versions[HIGH_QUALITY_RASTER_MODE];
 122   }
 123
 124   gfx::Rect opaque_rect() const { return opaque_rect_; }
 125   float contents_scale() const { return contents_scale_; }
 126   gfx::Rect content_rect() const { return content_rect_; }
 127
 128   int layer_id() const { return layer_id_; }
 129
 130   int source_frame_number() const { return source_frame_number_; }
 131
 132   void set_picture_pile(scoped_refptr<PicturePileImpl> pile) {
 133     DCHECK(pile->CanRaster(contents_scale_, content_rect_))
 134         << gfx::ScaleToEnclosingRect(content_rect_, 1.f / contents_scale_)
 135                .ToString();
 136     picture_pile_ = pile;
 137   }
 138
 139   size_t GPUMemoryUsageInBytes() const;
 140
 141   gfx::Size size() const { return size_; }
 142
 143   RasterMode DetermineRasterModeForTree(WhichTree tree) const;
 144   RasterMode DetermineOverallRasterMode() const;
 145
 146   // Functionality used in tests.
 147   RasterMode GetRasterModeForTesting() const {
 148     return managed_state().raster_mode;
 149   }
 150   ManagedTileState::TileVersion& GetTileVersionForTesting(RasterMode mode) {
 151     return managed_state_.tile_versions[mode];
 152   }
 153
 154  private:
 155   friend class TileManager;
 156   friend class PrioritizedTileSet;
 157   friend class FakeTileManager;
 158   friend class BinComparator;
 159   friend class FakePictureLayerImpl;
 160
 161   // Methods called by by tile manager.
 162   Tile(TileManager* tile_manager,
 163        PicturePileImpl* picture_pile,
 164        const gfx::Size& tile_size,
 165        const gfx::Rect& content_rect,
 166        const gfx::Rect& opaque_rect,
 167        float contents_scale,
 168        int layer_id,
 169        int source_frame_number,
 170        int flags);
 171   ~Tile();
 172
 173   ManagedTileState& managed_state() { return managed_state_; }
 174   const ManagedTileState& managed_state() const { return managed_state_; }
 175   RasterMode DetermineRasterModeForResolution(TileResolution resolution) const;
 176
 177   bool HasRasterTask() const;
 178
 179   TileManager* tile_manager_;
 180   scoped_refptr<PicturePileImpl> picture_pile_;
 181   gfx::Size size_;
 182   gfx::Rect content_rect_;
 183   float contents_scale_;
 184   gfx::Rect opaque_rect_;
 185   bool is_occluded_[NUM_TREES];
 186
 187   TilePriority priority_[NUM_TREES];
 188   ManagedTileState managed_state_;
 189   int layer_id_;
 190   int source_frame_number_;
 191   int flags_;
 192
 193   Id id_;
 194   static Id s_next_id_;
 195
 196   DISALLOW_COPY_AND_ASSIGN(Tile);
 197 };
 198
 199 }  // namespace cc
 200
 201 #endif  // CC_RESOURCES_TILE_H_