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27 #ifndef CCLayerTilingData_h
28 #define CCLayerTilingData_h
30 #if USE(ACCELERATED_COMPOSITING)
33 #include "TilingData.h"
34 #include <wtf/HashMap.h>
35 #include <wtf/HashTraits.h>
36 #include <wtf/PassOwnPtr.h>
37 #include <wtf/RefCounted.h>
41 class CCLayerTilingData {
43 enum BorderTexelOption { HasBorderTexels, NoBorderTexels };
45 static PassOwnPtr<CCLayerTilingData> create(const IntSize& tileSize, BorderTexelOption);
47 int numTiles() const { return m_tilingData.numTiles(); }
48 int numTilesX() const { return m_tilingData.numTilesX(); }
49 int numTilesY() const { return m_tilingData.numTilesY(); }
50 IntRect tileBounds(int i, int j) const { return m_tilingData.tileBounds(m_tilingData.tileIndex(i, j)); }
51 IntPoint textureOffset(int xIndex, int yIndex) const { return m_tilingData.textureOffset(xIndex, yIndex); }
53 // Set position of this tiled layer in content space.
54 void setLayerPosition(const IntPoint&);
56 // Change the tile size. This may invalidate all the existing tiles.
57 void setTileSize(const IntSize&);
58 const IntSize& tileSize() const { return m_tileSize; }
59 bool hasBorderTexels() const { return m_tilingData.borderTexels(); }
61 bool isEmpty() const { return !m_tilingData.numTiles() || !tiles().size(); }
63 const CCLayerTilingData& operator=(const CCLayerTilingData&);
65 class Tile: public RefCounted<Tile> {
66 WTF_MAKE_NONCOPYABLE(Tile);
68 Tile() : m_i(-1), m_j(-1) { }
71 int i() const { return m_i; }
72 int j() const { return m_j; }
73 void moveTo(int i, int j) { m_i = i; m_j = j; }
78 // Default hash key traits for integers disallow 0 and -1 as a key, so
79 // use a custom hash trait which disallows -1 and -2 instead.
80 typedef std::pair<int, int> TileMapKey;
81 struct TileMapKeyTraits : HashTraits<TileMapKey> {
82 static const bool emptyValueIsZero = false;
83 static const bool needsDestruction = false;
84 static TileMapKey emptyValue() { return std::make_pair(-1, -1); }
85 static void constructDeletedValue(TileMapKey& slot) { slot = std::make_pair(-2, -2); }
86 static bool isDeletedValue(TileMapKey value) { return value.first == -2 && value.second == -2; }
88 // FIXME: The mapped value in TileMap should really be an OwnPtr, as the
89 // refcount of a Tile should never be more than 1. However, HashMap
90 // doesn't easily support OwnPtr as a value.
91 typedef HashMap<TileMapKey, RefPtr<Tile>, DefaultHash<TileMapKey>::Hash, TileMapKeyTraits> TileMap;
93 void addTile(PassRefPtr<Tile>, int, int);
94 PassRefPtr<Tile> takeTile(int, int);
95 Tile* tileAt(int, int) const;
96 const TileMap& tiles() const { return m_tiles; }
98 // Grow layer size to contain this rectangle.
99 void growLayerToContain(const IntRect& contentRect);
100 void contentRectToTileIndices(const IntRect& contentRect, int &left, int &top, int &right, int &bottom) const;
101 IntRect contentRectToLayerRect(const IntRect& contentRect) const;
102 IntRect layerRectToContentRect(const IntRect& layerRect) const;
103 IntRect tileContentRect(const Tile*) const;
104 IntRect tileLayerRect(const Tile*) const;
109 CCLayerTilingData(const IntSize& tileSize, BorderTexelOption);
113 IntPoint m_layerPosition;
114 TilingData m_tilingData;
119 #endif // USE(ACCELERATED_COMPOSITING)