GLSLShader.h

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// Copyright (C) 2005 Dave Griffiths
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#ifdef GLSL
#include "GL/glew.h"
#endif
#ifndef __APPLE__
#include "GL/gl.h"
#include "GL/glu.h"
#include "GL/glut.h"
#else
#include "OpenGL/gl.h"
#include "OpenGL/glu.h"
#include "GLUT/glut.h"
#endif
#include <string>
#include <vector>
#include "dada.h"

#ifndef FLUXUS_GLSL_SHADER
#define FLUXUS_GLSL_SHADER

using namespace std;

namespace Fluxus
{

class GLSLShaderPair
{
public:
    GLSLShaderPair(const string &vertexfilename, const string &fragmentfilename);
    ~GLSLShaderPair();
    
    unsigned int GetVertexShader() const { return m_VertexShader; }
    unsigned int GetFragmentShader() const { return m_FragmentShader; }
    
private:
    bool Load(const string &vertexfilename, const string &fragmentfilename);
    unsigned int LoadShader(string filename, unsigned int type);

    unsigned int m_VertexShader;
    unsigned int m_FragmentShader;
};

class GLSLShader
{
public:
    GLSLShader() : m_RefCount(1), m_IsValid(false) {}
    GLSLShader(const GLSLShaderPair &pair);
    ~GLSLShader();

    // Temp fix, maybe
    void IncRef() { m_RefCount++; }
    bool DecRef() { m_RefCount--; return (m_RefCount==0); }

    static void Init();
    void Apply();
    static void Unapply();
    bool IsValid() { return m_IsValid; }
    
    void SetInt(const string &name, int s);
    void SetFloat(const string &name, float s);
    void SetVector(const string &name, dVector s);
    void SetColour(const string &name, dColour s);
    
    void SetFloatArray(const string &name, const vector<float> &s);
    void SetVectorArray(const string &name, const vector<dVector> &s);
    void SetColourArray(const string &name, const vector<dColour> &s);
    
    static bool m_Enabled;
    
private:
    unsigned int m_Program;
    unsigned int m_RefCount;
    bool m_IsValid;
};

}

#endif

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