cc/resources/layer_tiling_data.h

   1 // Copyright 2011 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_LAYER_TILING_DATA_H_
   6 #define CC_RESOURCES_LAYER_TILING_DATA_H_
   7
   8 #include <utility>
   9
  10 #include "base/basictypes.h"
  11 #include "base/containers/hash_tables.h"
  12 #include "base/containers/scoped_ptr_hash_map.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "cc/base/cc_export.h"
  15 #include "cc/base/simple_enclosed_region.h"
  16 #include "cc/base/tiling_data.h"
  17 #include "ui/gfx/geometry/rect.h"
  18
  19 namespace cc {
  20
  21 class CC_EXPORT LayerTilingData {
  22  public:
  23   enum BorderTexelOption {
  24     HAS_BORDER_TEXELS,
  25     NO_BORDER_TEXELS
  26   };
  27
  28   ~LayerTilingData();
  29
  30   static scoped_ptr<LayerTilingData> Create(const gfx::Size& tile_size,
  31                                             BorderTexelOption option);
  32
  33   bool has_empty_bounds() const { return tiling_data_.has_empty_bounds(); }
  34   int num_tiles_x() const { return tiling_data_.num_tiles_x(); }
  35   int num_tiles_y() const { return tiling_data_.num_tiles_y(); }
  36   gfx::Rect tile_bounds(int i, int j) const {
  37     return tiling_data_.TileBounds(i, j);
  38   }
  39   gfx::Vector2d texture_offset(int x_index, int y_index) const {
  40     return tiling_data_.TextureOffset(x_index, y_index);
  41   }
  42
  43   // Change the tile size. This may invalidate all the existing tiles.
  44   void SetTileSize(const gfx::Size& size);
  45   gfx::Size tile_size() const;
  46   // Change the border texel setting. This may invalidate all existing tiles.
  47   void SetBorderTexelOption(BorderTexelOption option);
  48   bool has_border_texels() const { return !!tiling_data_.border_texels(); }
  49
  50   bool is_empty() const { return has_empty_bounds() || !tiles().size(); }
  51
  52   const LayerTilingData& operator=(const LayerTilingData&);
  53
  54   class Tile {
  55    public:
  56     Tile() : i_(-1), j_(-1) {}
  57     virtual ~Tile() {}
  58
  59     int i() const { return i_; }
  60     int j() const { return j_; }
  61     void move_to(int i, int j) {
  62       i_ = i;
  63       j_ = j;
  64     }
  65
  66    private:
  67     int i_;
  68     int j_;
  69     DISALLOW_COPY_AND_ASSIGN(Tile);
  70   };
  71   typedef std::pair<int, int> TileMapKey;
  72   typedef base::ScopedPtrHashMap<TileMapKey, scoped_ptr<Tile>> TileMap;
  73
  74   void AddTile(scoped_ptr<Tile> tile, int i, int j);
  75   scoped_ptr<Tile> TakeTile(int i, int j);
  76   Tile* TileAt(int i, int j) const;
  77   const TileMap& tiles() const { return tiles_; }
  78
  79   void SetTilingSize(const gfx::Size& tiling_size);
  80   gfx::Size tiling_size() const { return tiling_data_.tiling_size(); }
  81
  82   void ContentRectToTileIndices(const gfx::Rect& rect,
  83                                 int* left,
  84                                 int* top,
  85                                 int* right,
  86                                 int* bottom) const;
  87   gfx::Rect TileRect(const Tile* tile) const;
  88
  89   void reset() { tiles_.clear(); }
  90
  91  protected:
  92   LayerTilingData(const gfx::Size& tile_size, BorderTexelOption option);
  93
  94   TileMap tiles_;
  95   TilingData tiling_data_;
  96
  97   DISALLOW_COPY(LayerTilingData);
  98 };
  99
 100 }  // namespace cc
 101
 102 #endif  // CC_RESOURCES_LAYER_TILING_DATA_H_