Part 8 of cc/ directory shuffles: resources

cc/picture_layer_tiling.h

-// Copyright 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CC_PICTURE_LAYER_TILING_H_
-#define CC_PICTURE_LAYER_TILING_H_
-
-#include "base/basictypes.h"
-#include "base/hash_tables.h"
-#include "base/memory/scoped_ptr.h"
-#include "cc/base/cc_export.h"
-#include "cc/base/hash_pair.h"
-#include "cc/base/region.h"
-#include "cc/base/tiling_data.h"
-#include "cc/tile.h"
-#include "cc/tile_priority.h"
-#include "ui/gfx/rect.h"
-
-namespace cc {
-
-class PictureLayerTiling;
-
-class PictureLayerTilingClient {
- public:
-  // Create a tile at the given content_rect (in the contents scale of the
-  // tiling) This might return null if the client cannot create such a tile.
-  virtual scoped_refptr<Tile> CreateTile(
-    PictureLayerTiling* tiling,
-    gfx::Rect content_rect) = 0;
-  virtual void UpdatePile(Tile* tile) = 0;
-  virtual gfx::Size CalculateTileSize(
-    gfx::Size current_tile_size,
-    gfx::Size content_bounds) = 0;
-};
-
-class CC_EXPORT PictureLayerTiling {
- public:
-  ~PictureLayerTiling();
-
-  // Create a tiling with no tiles.  CreateTiles must be called to add some.
-  static scoped_ptr<PictureLayerTiling> Create(float contents_scale);
-  scoped_ptr<PictureLayerTiling> Clone() const;
-
-  gfx::Size layer_bounds() const { return layer_bounds_; }
-  void SetLayerBounds(gfx::Size layer_bounds);
-  void Invalidate(const Region& layer_invalidation);
-
-  // Add any tiles that intersect with |layer_rect|.  If any tiles already
-  // exist, then this leaves them as-is.
-  void CreateTilesFromLayerRect(gfx::Rect layer_rect);
-
-  void SetClient(PictureLayerTilingClient* client);
-  void set_resolution(TileResolution resolution) { resolution_ = resolution; }
-  TileResolution resolution() const { return resolution_; }
-
-  gfx::Rect ContentRect() const;
-  gfx::SizeF ContentSizeF() const;
-  float contents_scale() const { return contents_scale_; }
-
-  std::vector<Tile*> AllTilesForTesting() const {
-    std::vector<Tile*> all_tiles;
-    for (TileMap::const_iterator it = tiles_.begin();
-         it != tiles_.end(); ++it)
-      all_tiles.push_back(it->second);
-    return all_tiles;
-  }
-
-  enum LayerDeviceAlignment {
-    LayerDeviceAlignmentUnknown,
-    LayerAlignedToDevice,
-    LayerNotAlignedToDevice,
-  };
-
-  static gfx::Rect ExpandRectEquallyToAreaBoundedBy(
-      gfx::Rect starting_rect,
-      int64 target_area,
-      gfx::Rect bounding_rect);
-
-  // Iterate over all tiles to fill content_rect.  Even if tiles are invalid
-  // (i.e. no valid resource) this tiling should still iterate over them.
-  // The union of all geometry_rect calls for each element iterated over should
-  // exactly equal content_rect and no two geometry_rects should intersect.
-  class CC_EXPORT Iterator {
-   public:
-    Iterator();
-    Iterator(const PictureLayerTiling* tiling,
-        float dest_scale,
-        gfx::Rect rect,
-        LayerDeviceAlignment layerDeviceAlignment);
-    ~Iterator();
-
-    // Visible rect (no borders), always in the space of content_rect,
-    // regardless of the contents scale of the tiling.
-    gfx::Rect geometry_rect() const;
-    // Texture rect (in texels) for geometry_rect
-    gfx::RectF texture_rect() const;
-    gfx::Size texture_size() const;
-
-    // Full rect (including borders) of the current tile, always in the space
-    // of content_rect, regardless of the contents scale of the tiling.
-    gfx::Rect full_tile_geometry_rect() const;
-
-    Tile* operator->() const { return current_tile_; }
-    Tile* operator*() const { return current_tile_; }
-
-    Iterator& operator++();
-    operator bool() const { return tile_j_ <= bottom_; }
-
-   private:
-    const PictureLayerTiling* tiling_;
-    gfx::Rect dest_rect_;
-    float dest_to_content_scale_;
-
-    Tile* current_tile_;
-    gfx::Rect current_geometry_rect_;
-    int tile_i_;
-    int tile_j_;
-    int left_;
-    int top_;
-    int right_;
-    int bottom_;
-
-    friend class PictureLayerTiling;
-  };
-
-  Region OpaqueRegionInContentRect(const gfx::Rect&) const;
-
-  void Reset() { return tiles_.clear(); }
-
-  void UpdateTilePriorities(
-      WhichTree tree,
-      gfx::Size device_viewport,
-      const gfx::RectF& viewport_in_layer_space,
-      gfx::Size last_layer_bounds,
-      gfx::Size current_layer_bounds,
-      float last_layer_contents_scale,
-      float current_layer_contents_scale,
-      const gfx::Transform& last_screen_transform,
-      const gfx::Transform& current_screen_transform,
-      int current_source_frame_number,
-      double current_frame_time,
-      bool store_screen_space_quads_on_tiles);
-
-  // Copies the src_tree priority into the dst_tree priority for all tiles.
-  // The src_tree priority is reset to the lowest priority possible.  This
-  // also updates the pile on each tile to be the current client's pile.
-  void DidBecomeActive();
-
-  scoped_ptr<base::Value> AsValue() const;
-
- protected:
-  typedef std::pair<int, int> TileMapKey;
-  typedef base::hash_map<TileMapKey, scoped_refptr<Tile> > TileMap;
-
-  PictureLayerTiling(float contents_scale);
-  Tile* TileAt(int, int) const;
-  void CreateTilesFromContentRect(gfx::Rect layer_rect);
-  void CreateTile(int i, int j);
-
-  PictureLayerTilingClient* client_;
-  float contents_scale_;
-  gfx::Size layer_bounds_;
-  gfx::Rect last_prioritized_rect_;
-  // It is not legal to have a NULL tile in the tiles_ map.
-  TileMap tiles_;
-  TilingData tiling_data_;
-  TileResolution resolution_;
-  int last_source_frame_number_;
-  double last_impl_frame_time_;
-
-  friend class Iterator;
-};
-
-}  // namespace cc
-
-#endif  // CC_PICTURE_LAYER_TILING_H_