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

  Program:   Visualization Toolkit
  Module:    vtkUniformVariables.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.

=========================================================================*/
#ifndef vtkUniformVariables_h
#define vtkUniformVariables_h

#include "vtkRenderingOpenGLModule.h" // For export macro
#include "vtkObject.h"

class vtkUniformVariablesMap; // internal

class VTKRENDERINGOPENGL_EXPORT vtkUniformVariables : public vtkObject
{
public:
  static vtkUniformVariables *New();
  vtkTypeMacro(vtkUniformVariables,vtkObject);
  void PrintSelf(ostream &os, vtkIndent indent);


  void SetUniformi(const char *name,
                   int numberOfComponents,
                   int *value);

  //BTX
  template<typename T>
  void SetUniformit(const char *name,
                   int numberOfComponents,
                   T *value);

  template<typename T>
  void SetUniformit(const char *name, T value)
  { this->SetUniformit(name, 1, &value); }
  //ETX


  void SetUniformf(const char *name,
                   int numberOfComponents,
                   float *value);

  //BTX
  template<typename T>
  void SetUniformft(const char *name,
                   int numberOfComponents,
                   T *value);

  template<typename T>
  void SetUniformft(const char *name, T value)
  { this->SetUniformft(name, 1, &value); }
  //ETX


  void SetUniformiv(const char *name,
                    int numberOfComponents,
                    int numberOfElements,
                    int *value);


  void SetUniformfv(const char *name,
                    int numberOfComponents,
                    int numberOfElements,
                    float *value);


  void SetUniformMatrix(const char *name,
                        int rows,
                        int columns,
                        float *value);

  void RemoveUniform(const char *name);

  void RemoveAllUniforms();


  void Send(const char *name,
            int uniformIndex);

  void Start();

  bool IsAtEnd();

  const char *GetCurrentName();

  void SendCurrentUniform(int uniformIndex);

  void Next();

  void DeepCopy(vtkUniformVariables *other);

  void Merge(vtkUniformVariables *other);

protected:
  vtkUniformVariables();
  virtual ~vtkUniformVariables();

private:
  vtkUniformVariables(const vtkUniformVariables&);  // Not implemented.
  void operator=(const vtkUniformVariables&);  // Not implemented.

  vtkUniformVariablesMap *Map;
};

//BTX
// ----------------------------------------------------------------------------
template<typename T>
void vtkUniformVariables::SetUniformit(const char *name,
                   int numberOfComponents,
                   T *value)
{
  int ivalues[4];
  for (int i=0; i<numberOfComponents; ++i)
    {
    ivalues[i] = static_cast<int>(value[i]);
    }
  this->SetUniformi(name, numberOfComponents, ivalues);
}

// ----------------------------------------------------------------------------
template<typename T>
void vtkUniformVariables::SetUniformft(const char *name,
                   int numberOfComponents,
                   T *value)
{
  float fvalues[4];
  for (int i=0; i<numberOfComponents; ++i)
    {
    fvalues[i] = static_cast<float>(value[i]);
    }
  this->SetUniformf(name, numberOfComponents, fvalues);
}
//ETX

#endif