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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 TiledTexture_h
#define TiledTexture_h
#include "BaseTile.h"
#include "BaseTileTexture.h"
#include "ClassTracker.h"
#include "IntRect.h"
#include "LayerAndroid.h"
#include "SkRefCnt.h"
#include "SkRegion.h"
#include "TextureOwner.h"
#include "TilePainter.h"
class SkCanvas;
namespace WebCore {
class TiledTexture {
public:
TiledTexture()
: m_prevTileX(0)
, m_prevTileY(0)
, m_scale(1)
, m_swapWhateverIsReady(false)
{
m_dirtyRegion.setEmpty();
#ifdef DEBUG_COUNT
ClassTracker::instance()->increment("TiledTexture");
#endif
}
virtual ~TiledTexture();
IntRect computeTilesArea(const IntRect& contentArea, float scale);
void prepareGL(GLWebViewState* state, float scale,
const IntRect& prepareArea, TilePainter* painter);
void swapTiles();
bool drawGL(const IntRect& visibleArea, float opacity, const TransformationMatrix* transform);
void prepareTile(int x, int y, TilePainter* painter);
void markAsDirty(const SkRegion& dirtyArea);
BaseTile* getTile(int x, int y);
void removeTiles();
void discardTextures();
bool owns(BaseTileTexture* texture);
float scale() { return m_scale; }
bool isReady();
int nbTextures(IntRect& area, float scale);
private:
bool tileIsVisible(BaseTile* tile);
Vector<BaseTile*> m_tiles;
// tile coordinates in viewport, set in prepareGL()
IntRect m_area;
SkRegion m_dirtyRegion;
int m_prevTileX;
int m_prevTileY;
float m_scale;
bool m_swapWhateverIsReady;
};
class DualTiledTexture : public SkRefCnt {
// TODO: investigate webkit threadsafe ref counting
public:
DualTiledTexture();
~DualTiledTexture();
void prepareGL(GLWebViewState* state, bool allowZoom,
const IntRect& prepareArea, TilePainter* painter);
void swapTiles();
void swap();
bool drawGL(const IntRect& visibleArea, float opacity, const TransformationMatrix* transform);
void markAsDirty(const SkRegion& dirtyArea);
bool owns(BaseTileTexture* texture);
void computeTexturesAmount(TexturesResult* result, LayerAndroid* layer);
void discardTextures()
{
m_textureA->discardTextures();
m_textureB->discardTextures();
}
bool isReady()
{
return !m_zooming && m_frontTexture->isReady();
}
int nbTextures(IntRect& area, float scale)
{
// TODO: consider the zooming case for the backTexture
if (!m_frontTexture)
return 0;
return m_frontTexture->nbTextures(area, scale);
}
private:
// Delay before we schedule a new tile at the new scale factor
static const double s_zoomUpdateDelay = 0.2; // 200 ms
TiledTexture* m_frontTexture;
TiledTexture* m_backTexture;
TiledTexture* m_textureA;
TiledTexture* m_textureB;
float m_scale;
float m_futureScale;
double m_zoomUpdateTime;
bool m_zooming;
IntRect m_preZoomPrepareArea;
};
} // namespace WebCore
#endif // TiledTexture_h
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