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 GrSurfaceOrigin fOrigin; 35 bool fCheckAllocation; 36 }; 37 38 // creates a GrGLRenderTarget associated with a texture 39 GrGLRenderTarget(GrGpuGL* gpu, 40 const Desc& desc, 41 const GrGLIRect& viewport, 42 GrGLTexID* texID, 43 GrGLTexture* texture); 44 45 // creates an independent GrGLRenderTarget 46 GrGLRenderTarget(GrGpuGL* gpu, 47 const Desc& desc, 48 const GrGLIRect& viewport); 49 ~GrGLRenderTarget()50 virtual ~GrGLRenderTarget() { this->release(); } 51 setViewport(const GrGLIRect & rect)52 void setViewport(const GrGLIRect& rect) { fViewport = rect; } getViewport()53 const GrGLIRect& getViewport() const { return fViewport; } 54 55 // The following two functions return the same ID when a 56 // texture/render target is multisampled, and different IDs when 57 // it is. 58 // FBO ID used to render into renderFBOID()59 GrGLuint renderFBOID() const { return fRTFBOID; } 60 // FBO ID that has texture ID attached. textureFBOID()61 GrGLuint textureFBOID() const { return fTexFBOID; } 62 63 // override of GrRenderTarget getRenderTargetHandle()64 virtual GrBackendObject getRenderTargetHandle() const { 65 return this->renderFBOID(); 66 } getRenderTargetResolvedHandle()67 virtual GrBackendObject getRenderTargetResolvedHandle() const { 68 return this->textureFBOID(); 69 } getResolveType()70 virtual ResolveType getResolveType() const { 71 72 if (!this->isMultisampled() || 73 fRTFBOID == fTexFBOID) { 74 // catches FBO 0 and non MSAA case 75 return kAutoResolves_ResolveType; 76 } else if (kUnresolvableFBOID == fTexFBOID) { 77 return kCantResolve_ResolveType; 78 } else { 79 return kCanResolve_ResolveType; 80 } 81 } 82 83 protected: 84 // override of GrResource 85 virtual void onAbandon() SK_OVERRIDE; 86 virtual void onRelease() SK_OVERRIDE; 87 88 private: 89 GrGLuint fRTFBOID; 90 GrGLuint fTexFBOID; 91 92 GrGLuint fMSColorRenderbufferID; 93 94 // when we switch to this render target we want to set the viewport to 95 // only render to to content area (as opposed to the whole allocation) and 96 // we want the rendering to be at top left (GL has origin in bottom left) 97 GrGLIRect fViewport; 98 99 // non-NULL if this RT was created by Gr with an associated GrGLTexture. 100 SkAutoTUnref<GrGLTexID> fTexIDObj; 101 102 void init(const Desc& desc, const GrGLIRect& viewport, GrGLTexID* texID); 103 104 typedef GrRenderTarget INHERITED; 105 }; 106 107 #endif 108