1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef GrSurfacePriv_DEFINED 9 #define GrSurfacePriv_DEFINED 10 11 #include "GrSurface.h" 12 13 /** Class that adds methods to GrSurface that are only intended for use internal to Skia. 14 This class is purely a privileged window into GrSurface. It should never have additional data 15 members or virtual methods. 16 Non-static methods that are not trivial inlines should be spring-boarded (e.g. declared and 17 implemented privately in GrSurface with a inline public method here). */ 18 class GrSurfacePriv { 19 public: 20 /** Helpers used in read/write pixels implementations. The parameters are adjusted so that the 21 read/write respects the bounds of a surface. If the input *rowBytes is 0 it will be 22 the tight row bytes (based on width and bpp) on output. */ 23 static bool AdjustReadPixelParams(int surfaceWidth, 24 int surfaceHeight, 25 size_t bpp, 26 int* left, int* top, int* width, int* height, 27 void** data, 28 size_t* rowBytes); 29 static bool AdjustWritePixelParams(int surfaceWidth, 30 int surfaceHeight, 31 size_t bpp, 32 int* left, int* top, int* width, int* height, 33 const void** data, 34 size_t* rowBytes); 35 36 bool hasPendingRead() const { return fSurface->hasPendingRead(); } 37 bool hasPendingWrite() const { return fSurface->hasPendingWrite(); } 38 bool hasPendingIO() const { return fSurface->hasPendingIO(); } 39 bool hasUniqueRef() const { return fSurface->internalHasUniqueRef(); } 40 41 private: 42 explicit GrSurfacePriv(GrSurface* surface) : fSurface(surface) {} 43 GrSurfacePriv(const GrSurfacePriv&); // unimpl 44 GrSurfacePriv& operator=(const GrSurfacePriv&); // unimpl 45 46 // No taking addresses of this type. 47 const GrSurfacePriv* operator&() const; 48 GrSurfacePriv* operator&(); 49 50 GrSurface* fSurface; 51 52 friend class GrSurface; // to construct/copy this type. 53 }; 54 55 inline GrSurfacePriv GrSurface::surfacePriv() { return GrSurfacePriv(this); } 56 57 inline const GrSurfacePriv GrSurface::surfacePriv() const { 58 return GrSurfacePriv(const_cast<GrSurface*>(this)); 59 } 60 61 #endif 62
