1 /* 2 * Copyright 2015 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 GrRenderTargetPriv_DEFINED 9 #define GrRenderTargetPriv_DEFINED 10 11 #include "src/gpu/GrGpu.h" 12 #include "src/gpu/GrRenderTarget.h" 13 14 class GrStencilSettings; 15 16 /** Class that adds methods to GrRenderTarget that are only intended for use internal to Skia. 17 This class is purely a privileged window into GrRenderTarget. It should never have additional 18 data members or virtual methods. */ 19 class GrRenderTargetPriv { 20 public: 21 /** 22 * GrStencilAttachment is not part of the public API. 23 */ getStencilAttachment()24 GrStencilAttachment* getStencilAttachment() const { 25 return fRenderTarget->fStencilAttachment.get(); 26 } 27 28 /** 29 * Attaches the GrStencilAttachment onto the render target. If stencil is a nullptr then the 30 * currently attached GrStencilAttachment will be removed if one was previously attached. This 31 * function returns false if there were any failure in attaching the GrStencilAttachment. 32 */ 33 void attachStencilAttachment(sk_sp<GrStencilAttachment> stencil); 34 35 int numStencilBits() const; 36 37 /** 38 * Returns a unique key that identifies this render target's sample pattern. (Must be 39 * multisampled.) 40 */ 41 int getSamplePatternKey() const; 42 43 /** 44 * Retrieves the per-pixel HW sample locations for this render target, and, as a by-product, the 45 * actual number of samples in use. (This may differ from fSampleCnt.) Sample locations are 46 * returned as 0..1 offsets relative to the top-left corner of the pixel. 47 */ getSampleLocations()48 const SkTArray<SkPoint>& getSampleLocations() const { 49 int samplePatternKey = this->getSamplePatternKey(); 50 return fRenderTarget->getGpu()->retrieveSampleLocations(samplePatternKey); 51 } 52 53 private: GrRenderTargetPriv(GrRenderTarget * renderTarget)54 explicit GrRenderTargetPriv(GrRenderTarget* renderTarget) : fRenderTarget(renderTarget) {} GrRenderTargetPriv(const GrRenderTargetPriv &)55 GrRenderTargetPriv(const GrRenderTargetPriv&) {} // unimpl 56 GrRenderTargetPriv& operator=(const GrRenderTargetPriv&); // unimpl 57 58 // No taking addresses of this type. 59 const GrRenderTargetPriv* operator&() const; 60 GrRenderTargetPriv* operator&(); 61 62 GrRenderTarget* fRenderTarget; 63 64 friend class GrRenderTarget; // to construct/copy this type. 65 }; 66 renderTargetPriv()67inline GrRenderTargetPriv GrRenderTarget::renderTargetPriv() { return GrRenderTargetPriv(this); } 68 renderTargetPriv()69inline const GrRenderTargetPriv GrRenderTarget::renderTargetPriv () const { 70 return GrRenderTargetPriv(const_cast<GrRenderTarget*>(this)); 71 } 72 73 #endif 74