/* * 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: /** Helpers used in read/write pixels implementations. The paramters are adjusted so that the read/write respects the bounds of a surface. If the input *rowBytes is 0 it will be the tight row bytes (based on width and bpp) on output. */ static bool AdjustReadPixelParams(int surfaceWidth, int surfaceHeight, size_t bpp, int* left, int* top, int* width, int* height, void** data, size_t* rowBytes); static bool AdjustWritePixelParams(int surfaceWidth, int surfaceHeight, size_t bpp, int* left, int* top, int* width, int* height, const void** data, size_t* rowBytes); bool hasPendingRead() const { return fSurface->hasPendingRead(); } bool hasPendingWrite() const { return fSurface->hasPendingWrite(); } bool hasPendingIO() const { return fSurface->hasPendingIO(); } private: explicit GrSurfacePriv(GrSurface* surface) : fSurface(surface) {} GrSurfacePriv(const GrSurfacePriv&); // unimpl GrSurfacePriv& operator=(const GrSurfacePriv&); // 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