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