VTK: dox/Rendering/VolumeOpenGL/vtkOpenGLHAVSVolumeMapper.h Source File

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00001 /*=========================================================================
00002 
00003 Program:   Visualization Toolkit
00004 Module:    vtkOpenGLHAVSVolumeMapper.h
00005 
00006 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
00007 All rights reserved.
00008 See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00009 
00010 This software is distributed WITHOUT ANY WARRANTY; without even
00011 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012 PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00015 
00016 /* Copyright 2005, 2006 by University of Utah. */
00017 
00117 #ifndef __vtkOpenGLHAVSVolumeMapper_h
00118 #define __vtkOpenGLHAVSVolumeMapper_h
00119 
00120 #include "vtkRenderingVolumeOpenGLModule.h" // For export macro
00121 #include "vtkHAVSVolumeMapper.h"
00122 
00123 #include <vtkWeakPointer.h> // to cache the vtkRenderWindow
00124 class vtkRenderer;
00125 class vtkRenderWindow;
00126 
00127 
00128 class VTKRENDERINGVOLUMEOPENGL_EXPORT vtkOpenGLHAVSVolumeMapper
00129   : public vtkHAVSVolumeMapper
00130 {
00131 public:
00132   static vtkOpenGLHAVSVolumeMapper *New();
00133   vtkTypeMacro(vtkOpenGLHAVSVolumeMapper,
00134                        vtkHAVSVolumeMapper);
00135   virtual void PrintSelf(ostream& os, vtkIndent indent);
00136 
00138   virtual void Render(vtkRenderer *ren, vtkVolume *vol);
00139 
00142   virtual void ReleaseGraphicsResources(vtkWindow *);
00143 
00146   virtual void SetGPUDataStructures(bool);
00147 
00149 
00153   virtual bool SupportedByHardware(vtkRenderer *r);
00154 protected:
00156 
00157   vtkOpenGLHAVSVolumeMapper();
00158   ~vtkOpenGLHAVSVolumeMapper();
00159   virtual int FillInputPortInformation(int port, vtkInformation* info);
00160 
00161 //BTX
00162   virtual void Initialize(vtkRenderer *ren, vtkVolume *vol);
00163   virtual void InitializeLookupTables(vtkVolume *vol);
00164   void InitializeGPUDataStructures();
00165   void InitializeShaders();
00166   void DeleteShaders();
00167   void InitializeFramebufferObject();
00168 
00169   void RenderHAVS(vtkRenderer *ren);
00170   void SetupFBOZBuffer(int screenWidth, int screenHeight, float depthNear, float depthFar,
00171                        float *zbuffer);
00172   void SetupFBOMRT();
00173   void DrawFBOInit(int screenWidth, int screenHeight, float depthNear, float depthFar);
00174   void DrawFBOGeometry();
00175   void DrawFBOFlush(int screenWidth, int screenHeight, float depthNear, float depthFar);
00176   void DrawBlend(int screenWidth, int screenHeight, float depthNear, float depthFar);
00177 
00178   void CheckOpenGLError(const char *str);
00179 
00180   // GPU
00181   unsigned int VBOVertexName;
00182   unsigned int VBOTexCoordName;
00183   unsigned int VBOVertexIndexName;
00184   unsigned int VertexProgram;
00185   unsigned int FragmentProgramBegin;
00186   unsigned int FragmentProgram;
00187   unsigned int FragmentProgramEnd;
00188   unsigned int FramebufferObject;
00189   int FramebufferObjectSize;
00190   unsigned int FramebufferTextures[4];
00191   unsigned int DepthTexture;
00192 
00193   // Lookup Tables
00194   unsigned int PsiTableTexture;
00195   unsigned int TransferFunctionTexture;
00196 
00197   vtkWeakPointer<vtkRenderWindow> RenderWindow;
00198 //ETX
00199 
00200 private:
00201   vtkOpenGLHAVSVolumeMapper(const vtkOpenGLHAVSVolumeMapper&);  // Not implemented.
00202   void operator=(const vtkOpenGLHAVSVolumeMapper&);  // Not implemented.
00203 };
00204 
00205 #endif