fragProgARB.h

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//////////////////////////////////////////////////////////////////////
// 10/3/02      Joe M. Kniss    Scientific Computing and Imaging Institute
// School of Computing          University of Utah
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
/////////////////////////////////////////////////////////////////////////
// Aaron Lefohn
//

#ifndef __FRAGMENT_PROGRAM_ARB_DOT_H
#define __FRAGMENT_PROGRAM_ARB_DOT_H

#include "stateGLI.h"
#include "pbuffGlift.h"
#include <GL/glew.h>

namespace glift {

///////////////////////////////////////////////////////////////////////
/// FragProgARB.h: interface for the FragProgARB class.
///
/// - Class for an ARB fragment program.
///////////////////////////////////////////////////////////////////////

class FragProgARB : public PixelShader
{
public:
   //construct a fragment program
   //  if isFileName is true, assumes the fragProg is a file, and tries to 
   //     read it, then loads the text in this file, othewize it assumes you
   //     passed in the string that is the fragment program itself
   FragProgARB( const char *fragProg, 
                bool isFileName = false, 
                PBuffGlift* pbuff=NULL, 
                bool noload = false ); 

   FragProgARB( const FragProgARB &rhs); 
   FragProgARB& operator=( const FragProgARB& rhs );


   virtual ~FragProgARB();

   void         init();
   virtual void reset(); //Destroy OpenGL shader object and re-initialize shader.
   virtual void reload(const char *shader);

   int  getInfoInt( GLenum param );
   virtual void setLocalConstf(unsigned int constNum, const gutz::vec4f& constant);
   virtual void setLocalConstd(unsigned int constNum, const gutz::vec4d& constant);

   /// will be 0 if invalid
   virtual char *getProgText() { return m_fragProg; }
   virtual char *getProgFile() { return m_fragProgFile; }       
   virtual void  setProgFile(const char *name);

protected:
   virtual void bindDef();
   virtual void releaseDef();

private:
   char        *m_fragProg;
   char        *m_fragProgFile;
   GLuint                m_shaderNum;           /// OpenGL shader object number
   PBuffGlift  *m_pbuff;                        /// The pbuffer context in which this shader exists (optional)
   int                   m_maxLocalParams;      /// Max number of local parameter constants

   void destroy();
   void initMembers( const char *fragProg, bool isFileName, GLuint shaderNum, PBuffGlift* pbuff );
   void initMembers( const FragProgARB &rhs);

};

typedef gutz::SmartPtr<FragProgARB> FragProgARBSP;

} //end namespace glift


#endif

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