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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkGrPixelRef_DEFINED
#define SkGrPixelRef_DEFINED
#include "SkBitmap.h"
#include "SkPixelRef.h"
#include "GrTexture.h"
#include "GrRenderTarget.h"
/**
* Common baseclass that implements onLockPixels() by calling onReadPixels().
* Since it has a copy, it always returns false for onLockPixelsAreWritable().
*/
class SK_API SkROLockPixelsPixelRef : public SkPixelRef {
public:
SkROLockPixelsPixelRef();
virtual ~SkROLockPixelsPixelRef();
protected:
// override from SkPixelRef
virtual void* onLockPixels(SkColorTable** ptr);
virtual void onUnlockPixels();
virtual bool onLockPixelsAreWritable() const; // return false;
private:
SkBitmap fBitmap;
typedef SkPixelRef INHERITED;
};
/**
* PixelRef that wraps a GrSurface
*/
class SK_API SkGrPixelRef : public SkROLockPixelsPixelRef {
public:
/**
* Constructs a pixel ref around a GrSurface. If the caller has locked the GrSurface in the
* cache and would like the pixel ref to unlock it in its destructor then transferCacheLock
* should be set to true.
*/
SkGrPixelRef(GrSurface* surface, bool transferCacheLock = false);
virtual ~SkGrPixelRef();
// override from SkPixelRef
virtual SkGpuTexture* getTexture() SK_OVERRIDE;
SK_DECLARE_UNFLATTENABLE_OBJECT()
protected:
// overrides from SkPixelRef
virtual bool onReadPixels(SkBitmap* dst, const SkIRect* subset) SK_OVERRIDE;
virtual SkPixelRef* deepCopy(SkBitmap::Config dstConfig, const SkIRect* subset) SK_OVERRIDE;
private:
GrSurface* fSurface;
bool fUnlock; // if true the pixel ref owns a texture cache lock on fSurface
typedef SkROLockPixelsPixelRef INHERITED;
};
#endif