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/*
* Copyright 2012, 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 Surface_h
#define Surface_h
#include "Color.h"
#include "IntRect.h"
#include "TilePainter.h"
#include "Vector.h"
class SkCanvas;
class SkRegion;
namespace WebCore {
class Tile;
class SurfaceBacking;
class LayerAndroid;
class TexturesResult;
class Surface : public TilePainter {
public:
Surface();
virtual ~Surface();
bool tryUpdateSurface(Surface* oldSurface);
void addLayer(LayerAndroid* layer, const TransformationMatrix& transform);
void prepareGL(bool layerTilesDisabled, bool updateWithBlit);
bool drawGL(bool layerTilesDisabled);
void swapTiles(bool calculateFrameworkInvals);
void addFrameworkInvals();
bool isReady();
bool isMissingContent();
bool canUpdateWithBlit();
void computeTexturesAmount(TexturesResult* result);
LayerAndroid* getFirstLayer() const { return m_layers[0]; }
bool needsTexture() { return m_needsTexture; }
bool isBase();
// don't allow transform fudging for merged layers - they need the transform
// static at paint time, and are always aligned to 0,0 doc coordinates.
bool allowTransformFudging() const { return singleLayer(); }
// TilePainter methods
virtual bool paint(SkCanvas* canvas);
virtual float opacity();
virtual Color* background();
virtual bool blitFromContents(Tile* tile);
private:
IntRect computePrepareArea();
IntRect visibleContentArea(bool force3dContentVisible = false) const;
IntRect fullContentArea();
bool singleLayer() const { return m_layers.size() == 1; }
bool useAggressiveRendering();
const TransformationMatrix* drawTransform();
IntRect m_fullContentArea;
TransformationMatrix m_drawTransform;
SurfaceBacking* m_surfaceBacking;
bool m_needsTexture;
float m_maxZoomScale;
Vector<LayerAndroid*> m_layers;
Color m_background;
};
class LayerMergeState {
public:
LayerMergeState(Vector<Surface*>* const allGroups)
: surfaceList(allGroups)
, currentSurface(0)
, nonMergeNestedLevel(0)
, depth(0)
{}
// vector storing all generated layer groups
Vector<Surface*>* const surfaceList;
// currently merging group. if cleared, no more layers may join
Surface* currentSurface;
// records depth within non-mergeable parents (clipping, fixed, scrolling)
// and disable merging therein.
int nonMergeNestedLevel;
// counts layer tree depth for debugging
int depth;
};
} // namespace WebCore
#endif //#define Surface_h
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