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/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     gfx::Rect opaque_rect() const { return opaque_rect_; }
  67     void set_opaque_rect(const gfx::Rect& opaque_rect) {
  68       opaque_rect_ = opaque_rect;
  69     }
  70    private:
  71     int i_;
  72     int j_;
  73     gfx::Rect opaque_rect_;
  74     DISALLOW_COPY_AND_ASSIGN(Tile);
  75   };
  76   typedef std::pair<int, int> TileMapKey;
  77   typedef base::ScopedPtrHashMap<TileMapKey, Tile> TileMap;
  78
  79   void AddTile(scoped_ptr<Tile> tile, int i, int j);
  80   scoped_ptr<Tile> TakeTile(int i, int j);
  81   Tile* TileAt(int i, int j) const;
  82   const TileMap& tiles() const { return tiles_; }
  83
  84   void SetTilingSize(const gfx::Size& tiling_size);
  85   gfx::Size tiling_size() const { return tiling_data_.tiling_size(); }
  86
  87   void ContentRectToTileIndices(const gfx::Rect& rect,
  88                                 int* left,
  89                                 int* top,
  90                                 int* right,
  91                                 int* bottom) const;
  92   gfx::Rect TileRect(const Tile* tile) const;
  93
  94   SimpleEnclosedRegion OpaqueRegionInContentRect(const gfx::Rect& rect) const;
  95
  96   void reset() { tiles_.clear(); }
  97
  98  protected:
  99   LayerTilingData(const gfx::Size& tile_size, BorderTexelOption option);
 100
 101   TileMap tiles_;
 102   TilingData tiling_data_;
 103
 104   DISALLOW_COPY(LayerTilingData);
 105 };
 106
 107 }  // namespace cc
 108
 109 #endif  // CC_RESOURCES_LAYER_TILING_DATA_H_