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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrSurfacePriv_DEFINED
#define GrSurfacePriv_DEFINED
#include "GrSurface.h"
/** Class that adds methods to GrSurface that are only intended for use internal to Skia.
This class is purely a privileged window into GrSurface. It should never have additional data
members or virtual methods.
Non-static methods that are not trivial inlines should be spring-boarded (e.g. declared and
implemented privately in GrSurface with a inline public method here). */
class GrSurfacePriv {
public:
/**
* Derive a SkImageInfo from the surface's descriptor. This is lossy as ImageInfo has fields not
* known to GrSurface (e.g. alphaType).
*/
SkImageInfo info() const { return fSurface->info(); }
/**
* Checks whether this GrSurface refers to the same GPU object as other. This
* catches the case where a GrTexture and GrRenderTarget refer to the same
* GPU memory.
*/
bool isSameAs(const GrSurface* other) const { return fSurface->isSameAs(other); }
/**
* Write the contents of the surface to a PNG. Returns true if successful.
* @param filename Full path to desired file
*/
bool savePixels(const char* filename) { return fSurface->savePixels(filename); }
bool hasPendingRead() const { return fSurface->hasPendingRead(); }
bool hasPendingWrite() const { return fSurface->hasPendingWrite(); }
bool hasPendingIO() const { return fSurface->hasPendingIO(); }
private:
GrSurfacePriv(GrSurface* surface) : fSurface(surface) { }
GrSurfacePriv(const GrSurfacePriv& that) : fSurface(that.fSurface) { }
GrSurfacePriv& operator=(const GrSurface&); // unimpl
// No taking addresses of this type.
const GrSurfacePriv* operator&() const;
GrSurfacePriv* operator&();
GrSurface* fSurface;
friend class GrSurface; // to construct/copy this type.
};
inline GrSurfacePriv GrSurface::surfacePriv() { return GrSurfacePriv(this); }
inline const GrSurfacePriv GrSurface::surfacePriv() const {
return GrSurfacePriv(const_cast<GrSurface*>(this));
}
#endif
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