/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrSurfacePriv_DEFINED
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#define GrSurfacePriv_DEFINED
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#include "GrSurface.h"
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/** Class that adds methods to GrSurface that are only intended for use internal to Skia.
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This class is purely a privileged window into GrSurface. It should never have additional data
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members or virtual methods.
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Non-static methods that are not trivial inlines should be spring-boarded (e.g. declared and
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implemented privately in GrSurface with a inline public method here). */
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class GrSurfacePriv {
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public:
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/** Helpers used in read/write pixels implementations. The parameters are adjusted so that the
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read/write respects the bounds of a surface. If the input *rowBytes is 0 it will be
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the tight row bytes (based on width and bpp) on output. */
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static bool AdjustReadPixelParams(int surfaceWidth,
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int surfaceHeight,
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size_t bpp,
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int* left, int* top, int* width, int* height,
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void** data,
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size_t* rowBytes);
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static bool AdjustWritePixelParams(int surfaceWidth,
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int surfaceHeight,
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size_t bpp,
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int* left, int* top, int* width, int* height,
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const void** data,
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size_t* rowBytes);
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bool hasPendingRead() const { return fSurface->hasPendingRead(); }
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bool hasPendingWrite() const { return fSurface->hasPendingWrite(); }
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bool hasPendingIO() const { return fSurface->hasPendingIO(); }
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bool hasUniqueRef() const { return fSurface->internalHasUniqueRef(); }
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GrInternalSurfaceFlags flags() const { return fSurface->fSurfaceFlags; }
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private:
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explicit GrSurfacePriv(GrSurface* surface) : fSurface(surface) {}
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GrSurfacePriv(const GrSurfacePriv&); // unimpl
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GrSurfacePriv& operator=(const GrSurfacePriv&); // unimpl
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// No taking addresses of this type.
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const GrSurfacePriv* operator&() const;
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GrSurfacePriv* operator&();
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GrSurface* fSurface;
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friend class GrSurface; // to construct/copy this type.
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};
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inline GrSurfacePriv GrSurface::surfacePriv() { return GrSurfacePriv(this); }
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inline const GrSurfacePriv GrSurface::surfacePriv() const {
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return GrSurfacePriv(const_cast<GrSurface*>(this));
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}
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#endif
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