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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 PicturePile_h
#define PicturePile_h
#include "IntRect.h"
#include "IntSize.h"
#include "PrerenderedInval.h"
#include "SkBitmap.h"
#include "SkRegion.h"
#include "SkRefCnt.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/Vector.h>
class SkPicture;
class SkCanvas;
namespace WebCore {
class GraphicsContext;
class PicturePainter {
public:
virtual void paintContents(GraphicsContext* gc, IntRect& dirty) = 0;
virtual SkCanvas* createPrerenderCanvas(PrerenderedInval* prerendered)
{
return 0;
}
virtual ~PicturePainter() {}
};
class PictureContainer {
public:
SkPicture* picture;
IntRect area;
bool dirty;
RefPtr<PrerenderedInval> prerendered;
PictureContainer(const IntRect& area)
: picture(0)
, area(area)
, dirty(true)
{}
PictureContainer(const PictureContainer& other)
: picture(other.picture)
, area(other.area)
, dirty(other.dirty)
, prerendered(other.prerendered)
{
SkSafeRef(picture);
}
~PictureContainer()
{
SkSafeUnref(picture);
}
};
class PicturePile {
public:
PicturePile() {}
PicturePile(const PicturePile& other);
PicturePile(SkPicture* picture);
const IntSize& size() { return m_size; }
void clearPrerenders();
// used by PicturePileLayerContents
void draw(SkCanvas* canvas);
// Used by WebViewCore
void invalidate(const IntRect& dirtyRect);
void setSize(const IntSize& size);
void updatePicturesIfNeeded(PicturePainter* painter);
void reset();
SkRegion& dirtyRegion() { return m_dirtyRegion; }
PrerenderedInval* prerenderedInvalForArea(const IntRect& area);
private:
void applyWebkitInvals();
void updatePicture(PicturePainter* painter, PictureContainer& container);
void appendToPile(const IntRect& inval, const IntRect& originalInval = IntRect());
void drawWithClipRecursive(SkCanvas* canvas, SkRegion& clipRegion, int index);
IntSize m_size;
Vector<PictureContainer> m_pile;
Vector<IntRect> m_webkitInvals;
SkRegion m_dirtyRegion;
};
} // namespace android
#endif // PicturePile_h
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