michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkGrPixelRef_DEFINED
michael@0: #define SkGrPixelRef_DEFINED
michael@0: 
michael@0: #include "SkBitmap.h"
michael@0: #include "SkPixelRef.h"
michael@0: #include "GrTexture.h"
michael@0: #include "GrRenderTarget.h"
michael@0: 
michael@0: 
michael@0: /**
michael@0:  *  Common baseclass that implements onLockPixels() by calling onReadPixels().
michael@0:  *  Since it has a copy, it always returns false for onLockPixelsAreWritable().
michael@0:  */
michael@0: class SK_API SkROLockPixelsPixelRef : public SkPixelRef {
michael@0: public:
michael@0:     SK_DECLARE_INST_COUNT(SkROLockPixelsPixelRef)
michael@0:     SkROLockPixelsPixelRef(const SkImageInfo&);
michael@0:     virtual ~SkROLockPixelsPixelRef();
michael@0: 
michael@0: protected:
michael@0:     virtual bool onNewLockPixels(LockRec*) SK_OVERRIDE;
michael@0:     virtual void onUnlockPixels() SK_OVERRIDE;
michael@0:     virtual bool onLockPixelsAreWritable() const SK_OVERRIDE;   // return false;
michael@0: 
michael@0: private:
michael@0:     SkBitmap    fBitmap;
michael@0:     typedef SkPixelRef INHERITED;
michael@0: };
michael@0: 
michael@0: /**
michael@0:  *  PixelRef that wraps a GrSurface
michael@0:  */
michael@0: class SK_API SkGrPixelRef : public SkROLockPixelsPixelRef {
michael@0: public:
michael@0:     SK_DECLARE_INST_COUNT(SkGrPixelRef)
michael@0:     /**
michael@0:      * Constructs a pixel ref around a GrSurface. If the caller has locked the GrSurface in the
michael@0:      * cache and would like the pixel ref to unlock it in its destructor then transferCacheLock
michael@0:      * should be set to true.
michael@0:      */
michael@0:     SkGrPixelRef(const SkImageInfo&, GrSurface*, bool transferCacheLock = false);
michael@0:     virtual ~SkGrPixelRef();
michael@0: 
michael@0:     // override from SkPixelRef
michael@0:     virtual GrTexture* getTexture() SK_OVERRIDE;
michael@0: 
michael@0:     SK_DECLARE_UNFLATTENABLE_OBJECT()
michael@0: 
michael@0: protected:
michael@0:     // overrides from SkPixelRef
michael@0:     virtual bool onReadPixels(SkBitmap* dst, const SkIRect* subset) SK_OVERRIDE;
michael@0:     virtual SkPixelRef* deepCopy(SkBitmap::Config dstConfig, const SkIRect* subset) SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     GrSurface*  fSurface;
michael@0:     bool        fUnlock;   // if true the pixel ref owns a texture cache lock on fSurface
michael@0: 
michael@0:     typedef SkROLockPixelsPixelRef INHERITED;
michael@0: };
michael@0: 
michael@0: #endif