dox/Rendering/vtkGLSLShader.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkGLSLShader.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/*
 * Copyright 2003 Sandia Corporation.
 * Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
 * license for use of this work by or on behalf of the
 * U.S. Government. Redistribution and use in source and binary forms, with
 * or without modification, are permitted provided that this Notice and any
 * statement of authorship are reproduced on all copies.
 */

#ifndef __vtkGLSLShader_h
#define __vtkGLSLShader_h

#include "vtkShader.h"

class vtkActor;
class vtkRenderer;
class vtkProperty;
class vtkLight;
class vtkCamera;
class vtkRenderWindow;

// Manages all shaders defined in the XML file
// especially the part about sending things to the card
class VTK_RENDERING_EXPORT vtkGLSLShader : public vtkShader
{
public:
  static vtkGLSLShader *New();
  vtkTypeMacro(vtkGLSLShader, vtkShader);
  void PrintSelf(ostream &os, vtkIndent indent);
  
  virtual int Compile();

  unsigned int GetHandle() { return this->Shader; }


  vtkSetMacro( Program, unsigned int );
  vtkGetMacro( Program, unsigned int );


  virtual void ReleaseGraphicsResources(vtkWindow *);
protected:
  vtkGLSLShader();
  virtual ~vtkGLSLShader();

  // These are GLuints.
  unsigned int Program;
  unsigned int Shader;

  int IsShader();
  int IsCompiled();

  void LoadShader();


  virtual void SetUniformParameter(const char* name, int numValues, const int* value);
  virtual void SetUniformParameter(const char* name, int numValues, const float* value);
  virtual void SetUniformParameter(const char* name, int numValues, const double* value);


  virtual void SetMatrixParameter(const char* name, int numValues, 
    int order, const float* value);
  virtual void SetMatrixParameter(const char* name, int numValues, 
    int order, const double* value);
  virtual void SetMatrixParameter(const char* name, const char* state_matix_type,
    const char* transform_type);

  virtual void SetSamplerParameter(const char* name, vtkTexture* texture,
                                   int textureIndex);
private:
  vtkGLSLShader(const vtkGLSLShader&); // Not Implemented
  void operator=(const vtkGLSLShader&); // Not Implemented

  int GetUniformLocation( const char* name );
};
#endif //__vtkGLSLShader_h

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