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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LayerTilerChromium_h
#define LayerTilerChromium_h
#if USE(ACCELERATED_COMPOSITING)
#include "LayerChromium.h"
#include <wtf/OwnArrayPtr.h>
namespace WebCore {
class GraphicsContext3D;
class LayerRendererChromium;
class TilePaintInterface {
public:
virtual void paint(GraphicsContext& context, const IntRect& contentRect) = 0;
};
class LayerTilerChromium : public Noncopyable {
public:
static PassOwnPtr<LayerTilerChromium> create(LayerRendererChromium* layerRenderer, const IntSize& tileSize);
~LayerTilerChromium();
void invalidateRect(const IntRect& contentRect);
void invalidateEntireLayer();
void update(TilePaintInterface& painter, const IntRect& contentRect);
void draw(const IntRect& contentRect);
// Set position of this tiled layer in content space.
void setLayerPosition(const IntPoint& position);
// Change the tile size. This may invalidate all the existing tiles.
void setTileSize(const IntSize& size);
private:
LayerTilerChromium(LayerRendererChromium* layerRenderer, const IntSize& tileSize);
class Tile {
public:
explicit Tile(unsigned int textureId) : m_textureId(textureId) { }
~Tile();
unsigned int textureId() const { return m_textureId; }
unsigned int releaseTextureId();
bool dirty() const { return !m_dirtyLayerRect.isEmpty(); }
void clearDirty() { m_dirtyLayerRect = IntRect(); }
// Layer-space dirty rectangle that needs to be repainted.
IntRect m_dirtyLayerRect;
private:
unsigned int m_textureId;
};
void resizeLayer(const IntSize& size);
// Grow layer size to contain this rectangle.
void growLayerToContain(const IntRect& contentRect);
LayerRendererChromium* layerRenderer() const { return m_layerRenderer; }
GraphicsContext3D* layerRendererContext() const;
Tile* createTile(int i, int j);
// Invalidate any tiles which do not intersect with the newLayerRect.
void invalidateTiles(const IntRect& oldLayerRect, const IntRect& newLayerRect);
void reset();
void contentRectToTileIndices(const IntRect& contentRect, int &left, int &top, int &right, int &bottom) const;
IntRect contentRectToLayerRect(const IntRect& contentRect) const;
IntRect layerRectToContentRect(const IntRect& layerRect) const;
// Returns the index into m_tiles for a given tile location.
int tileIndex(int i, int j) const;
// Returns the bounds in content space for a given tile location.
IntRect tileContentRect(int i, int j) const;
// Returns the bounds in layer space for a given tile location.
IntRect tileLayerRect(int i, int j) const;
IntSize m_tileSize;
IntSize m_layerSize;
IntSize m_layerTileSize;
IntRect m_lastUpdateLayerRect;
IntPoint m_layerPosition;
// Logical 2D array of tiles (dimensions of m_layerTileSize)
Vector<OwnPtr<Tile> > m_tiles;
// Linear array of unused tiles.
Vector<OwnPtr<Tile> > m_unusedTiles;
// Cache a tile-sized pixel buffer to draw into.
OwnArrayPtr<uint8_t> m_tilePixels;
LayerRendererChromium* m_layerRenderer;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif
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