//
// Simple wrapper class for OpenGL vertex programs
//
// Author: Alex V. Boreskoff <alexboreskoff@mtu-net.ru>, <steps3d@narod.ru>
//

#ifndef __FRAGMENT_PROGRAM__
#define __FRAGMENT_PROGRAM__

#include    <string>
#include    "../LibExt/libExt.h"
#include    "../Vector/Vector3D.h"
#include    "../Vector/Vector4D.h"
#include    "ParamProxy.h"

using namespace std;

class   Data;

class   FragmentProgram
{
protected:
    int                 errorCode;
    string              errorString;
    unsigned            id;                 // program id

public:
    ParamArray          local;              // local parameters

    static ParamArray   env;                // environment params
    static int          activeProgram;
    static int          maxAluInstructions ();
    static int          maxTexInstructions ();
    static int          maxTexIndirections ();
    static int          maxInstructions    ();
    static int          maxLocalParams     ();
    static int          maxEnvParams       ();
    static int          maxTemporaries     ();
    static int          maxProgramAttribs  ();

    static  bool    isSupported ();

    FragmentProgram  ();
    FragmentProgram  ( const char * fileName );
    ~FragmentProgram ();

    unsigned    getId () const
    {
        return id;
    }

    string  getErrorString () const
    {
        return errorString;
    }

    void    bind   ();
    void    unbind ();

    void    enable  ();
    void    disable ();

    bool    load ( Data * data );
    bool    load ( const char * fileName );
};

#endif