1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef GrGLRenderTarget_DEFINED 11 #define GrGLRenderTarget_DEFINED 12 13 #include "GrGLIRect.h" 14 #include "GrRenderTarget.h" 15 #include "GrScalar.h" 16 17 class GrGpuGL; 18 class GrGLTexture; 19 class GrGLTexID; 20 21 class GrGLRenderTarget : public GrRenderTarget { 22 23 public: 24 // set fTexFBOID to this value to indicate that it is multisampled but 25 // Gr doesn't know how to resolve it. 26 enum { kUnresolvableFBOID = 0 }; 27 28 struct Desc { 29 GrGLuint fRTFBOID; 30 GrGLuint fTexFBOID; 31 GrGLuint fMSColorRenderbufferID; 32 bool fOwnIDs; 33 GrPixelConfig fConfig; 34 int fSampleCnt; 35 }; 36 37 // creates a GrGLRenderTarget associated with a texture 38 GrGLRenderTarget(GrGpuGL* gpu, 39 const Desc& desc, 40 const GrGLIRect& viewport, 41 GrGLTexID* texID, 42 GrGLTexture* texture); 43 44 // creates an independent GrGLRenderTarget 45 GrGLRenderTarget(GrGpuGL* gpu, 46 const Desc& desc, 47 const GrGLIRect& viewport); 48 ~GrGLRenderTarget()49 virtual ~GrGLRenderTarget() { this->release(); } 50 setViewport(const GrGLIRect & rect)51 void setViewport(const GrGLIRect& rect) { fViewport = rect; } getViewport()52 const GrGLIRect& getViewport() const { return fViewport; } 53 54 // The following two functions return the same ID when a 55 // texture-rendertarget is multisampled, and different IDs when 56 // it is. 57 // FBO ID used to render into renderFBOID()58 GrGLuint renderFBOID() const { return fRTFBOID; } 59 // FBO ID that has texture ID attached. textureFBOID()60 GrGLuint textureFBOID() const { return fTexFBOID; } 61 62 // override of GrRenderTarget getRenderTargetHandle()63 virtual intptr_t getRenderTargetHandle() const { 64 return this->renderFBOID(); 65 } getRenderTargetResolvedHandle()66 virtual intptr_t getRenderTargetResolvedHandle() const { 67 return this->textureFBOID(); 68 } getResolveType()69 virtual ResolveType getResolveType() const { 70 71 if (!this->isMultisampled() || 72 fRTFBOID == fTexFBOID) { 73 // catches FBO 0 and non MSAA case 74 return kAutoResolves_ResolveType; 75 } else if (kUnresolvableFBOID == fTexFBOID) { 76 return kCantResolve_ResolveType; 77 } else { 78 return kCanResolve_ResolveType; 79 } 80 } 81 82 protected: 83 // override of GrResource 84 virtual void onAbandon(); 85 virtual void onRelease(); 86 87 private: 88 GrGLuint fRTFBOID; 89 GrGLuint fTexFBOID; 90 91 GrGLuint fMSColorRenderbufferID; 92 93 // Should this object delete IDs when it is destroyed or does someone 94 // else own them. 95 bool fOwnIDs; 96 97 // when we switch to this rendertarget we want to set the viewport to 98 // only render to to content area (as opposed to the whole allocation) and 99 // we want the rendering to be at top left (GL has origin in bottom left) 100 GrGLIRect fViewport; 101 102 // non-NULL if this RT was created by Gr with an associated GrGLTexture. 103 GrGLTexID* fTexIDObj; 104 105 void init(const Desc& desc, const GrGLIRect& viewport, GrGLTexID* texID); 106 107 typedef GrRenderTarget INHERITED; 108 }; 109 110 #endif 111