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/*
* Copyright 2011, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER OR
* 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 TileGrid_h
#define TileGrid_h
#include "IntRect.h"
#include "SkRegion.h"
#include <wtf/Vector.h>
namespace WebCore {
class Color;
class GLWebViewState;
class Tile;
class TilePainter;
class TransformationMatrix;
class TileGrid {
public:
enum PrepareRegionFlags { EmptyRegion = 0x0, StandardRegion = 0x1, ExpandedRegion = 0x2 };
TileGrid(bool isBaseSurface);
virtual ~TileGrid();
static IntRect computeTilesArea(const IntRect& contentArea, float scale);
void prepareGL(GLWebViewState* state, float scale,
const IntRect& prepareArea, const IntRect& fullContentArea,
TilePainter* painter, int regionFlags = StandardRegion,
bool isLowResPrefetch = false, bool updateWithBlit = false);
bool swapTiles();
void drawGL(const IntRect& visibleContentArea, float opacity,
const TransformationMatrix* transform, const Color* background = 0);
void markAsDirty(const SkRegion& dirtyArea);
Tile* getTile(int x, int y);
void removeTiles();
void discardTextures();
bool isReady();
bool isMissingContent();
bool isDirty() { return !m_dirtyRegion.isEmpty(); }
int nbTextures(const IntRect& area, float scale);
unsigned int getImageTextureId();
private:
void prepareTile(int x, int y, TilePainter* painter,
GLWebViewState* state, bool isLowResPrefetch,
bool isExpandPrefetch, bool shouldTryUpdateWithBlit);
void drawMissingRegion(const SkRegion& region, float opacity, const Color* tileBackground);
bool tryBlitFromContents(Tile* tile, TilePainter* painter);
WTF::Vector<Tile*> m_tiles;
IntRect m_area;
SkRegion m_dirtyRegion;
int m_prevTileY;
float m_scale;
bool m_isBaseSurface;
};
} // namespace WebCore
#endif // TileGrid_h
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