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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    vtkOpenGLTexture.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 =========================================================================*/
00021 #ifndef vtkOpenGLShaderCache_h
00022 #define vtkOpenGLShaderCache_h
00023 
00024 #include "vtkRenderingOpenGL2Module.h" // For export macro
00025 #include "vtkObject.h"
00026 
00027 class vtkShader;
00028 class vtkShaderProgram;
00029 class vtkWindow;
00030 
00031 class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLShaderCache : public vtkObject
00032 {
00033 public:
00034   static vtkOpenGLShaderCache *New();
00035   vtkTypeMacro(vtkOpenGLShaderCache, vtkObject);
00036   virtual void PrintSelf(ostream& os, vtkIndent indent);
00037 
00038   // make sure the specified shader is compiled, linked, and bound
00039   virtual vtkShaderProgram *ReadyShader(const char *vertexCode,
00040                                            const char *fragmentCode,
00041                                            const char *geometryCode);
00042   virtual vtkShaderProgram *ReadyShader(vtkShaderProgram *shader);
00043 
00047   void ReleaseCurrentShader();
00048 
00050   virtual void ReleaseGraphicsResources(vtkWindow *win);
00051 
00053 
00055   virtual void ClearLastShaderBound() { this->LastShaderBound = NULL; }
00056   vtkGetObjectMacro(LastShaderBound, vtkShaderProgram);
00058 
00059 protected:
00060   vtkOpenGLShaderCache();
00061   ~vtkOpenGLShaderCache();
00062 
00063   virtual vtkShaderProgram* GetShader(const char *vertexCode,
00064                                       const char *fragmentCode,
00065                                       const char *geometryCode);
00066   virtual int BindShader(vtkShaderProgram* shader);
00067 
00068   class Private;
00069   Private *Internal;
00070   vtkShaderProgram *LastShaderBound;
00071 
00072 private:
00073   vtkOpenGLShaderCache(const vtkOpenGLShaderCache&);  // Not implemented.
00074   void operator=(const vtkOpenGLShaderCache&);  // Not implemented.
00075 
00076 };
00077 
00078 #endif