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// Copyright 2011 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 CCLayerTilingData_h
#define CCLayerTilingData_h
#if USE(ACCELERATED_COMPOSITING)
#include "IntRect.h"
#include "Region.h"
#include "TilingData.h"
#include <wtf/HashMap.h>
#include <wtf/HashTraits.h>
#include <wtf/PassOwnPtr.h>
namespace cc {
class CCLayerTilingData {
public:
enum BorderTexelOption { HasBorderTexels, NoBorderTexels };
~CCLayerTilingData();
static PassOwnPtr<CCLayerTilingData> create(const IntSize& tileSize, BorderTexelOption);
bool hasEmptyBounds() const { return m_tilingData.hasEmptyBounds(); }
int numTilesX() const { return m_tilingData.numTilesX(); }
int numTilesY() const { return m_tilingData.numTilesY(); }
IntRect tileBounds(int i, int j) const { return m_tilingData.tileBounds(i, j); }
IntPoint textureOffset(int xIndex, int yIndex) const { return m_tilingData.textureOffset(xIndex, yIndex); }
// Change the tile size. This may invalidate all the existing tiles.
void setTileSize(const IntSize&);
IntSize tileSize() const;
// Change the border texel setting. This may invalidate all existing tiles.
void setBorderTexelOption(BorderTexelOption);
bool hasBorderTexels() const { return m_tilingData.borderTexels(); }
bool isEmpty() const { return hasEmptyBounds() || !tiles().size(); }
const CCLayerTilingData& operator=(const CCLayerTilingData&);
class Tile {
WTF_MAKE_NONCOPYABLE(Tile);
public:
Tile() : m_i(-1), m_j(-1) { }
virtual ~Tile() { }
int i() const { return m_i; }
int j() const { return m_j; }
void moveTo(int i, int j) { m_i = i; m_j = j; }
const IntRect& opaqueRect() const { return m_opaqueRect; }
void setOpaqueRect(const IntRect& opaqueRect) { m_opaqueRect = opaqueRect; }
private:
int m_i;
int m_j;
IntRect m_opaqueRect;
};
// Default hash key traits for integers disallow 0 and -1 as a key, so
// use a custom hash trait which disallows -1 and -2 instead.
typedef std::pair<int, int> TileMapKey;
struct TileMapKeyTraits : HashTraits<TileMapKey> {
static const bool emptyValueIsZero = false;
static const bool needsDestruction = false;
static TileMapKey emptyValue() { return std::make_pair(-1, -1); }
static void constructDeletedValue(TileMapKey& slot) { slot = std::make_pair(-2, -2); }
static bool isDeletedValue(TileMapKey value) { return value.first == -2 && value.second == -2; }
};
typedef HashMap<TileMapKey, OwnPtr<Tile>, DefaultHash<TileMapKey>::Hash, TileMapKeyTraits> TileMap;
void addTile(PassOwnPtr<Tile>, int, int);
PassOwnPtr<Tile> takeTile(int, int);
Tile* tileAt(int, int) const;
const TileMap& tiles() const { return m_tiles; }
void setBounds(const IntSize&);
IntSize bounds() const;
void contentRectToTileIndices(const IntRect&, int &left, int &top, int &right, int &bottom) const;
IntRect tileRect(const Tile*) const;
Region opaqueRegionInContentRect(const IntRect&) const;
void reset();
protected:
CCLayerTilingData(const IntSize& tileSize, BorderTexelOption);
TileMap m_tiles;
TilingData m_tilingData;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif
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