ProgramGPU.h

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//      File:           ProgramGPU.h
//      Author:         Changchang Wu
//      Description : Based class for GPU programs
//              ProgramGPU:     base class of ProgramGLSL
//              FilterProgram:  base class of FilterGLSL, FilterPKSL
//
//      Copyright (c) 2007 University of North Carolina at Chapel Hill
//      All Rights Reserved
//
//      Permission to use, copy, modify and distribute this software and its
//      documentation for educational, research and non-profit purposes, without
//      fee, and without a written agreement is hereby granted, provided that the
//      above copyright notice and the following paragraph appear in all copies.
//      
//      The University of North Carolina at Chapel Hill make no representations
//      about the suitability of this software for any purpose. It is provided
//      'as is' without express or implied warranty. 
//
//      Please send BUG REPORTS to ccwu@cs.unc.edu
//


#ifndef _PROGRAM_GPU_H
#define _PROGRAM_GPU_H

//class         ProgramGPU
//description:  pure virtual class
//                              provides a common interface for shader programs
class ProgramGPU
{
public:
        //use a gpu program
        virtual int     UseProgram() = 0;
    virtual void*   GetProgramID() = 0;
        //not used
        virtual ~ProgramGPU(){};
};

//class                 FilterProgram
class  FilterProgram
{
public:
        ProgramGPU*  s_shader_h;
        ProgramGPU*  s_shader_v;
        int                      _size;
        int                      _id; 
public:
    FilterProgram()          {  s_shader_h = s_shader_v = NULL; _size = _id = 0; }
    virtual ~FilterProgram() {  if(s_shader_h) delete s_shader_h;       if(s_shader_v) delete s_shader_v;}
};

#endif