core/kgllib/program.h

/*
 * Copyright (C) 2008 Rivo Laks <rivolaks@hot.ee>
 *
 * 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef KGLLIB_PROGRAM_H
#define KGLLIB_PROGRAM_H

namespace KGLLib
{
    class Shader;
}
class QString;
template<class T> class QList;
template<class K, class V> class QHash;

#include "kgllib.h"
#include <Eigen/Core>

namespace KGLLib
{

class KGLLIB_EXPORT Program
{
public:
    Program();
    Program(const QList<Shader*>& shaders);
    Program(const QString& vertexshaderfile, const QString& fragmentshaderfile);
    virtual ~Program();

    void addShader(Shader* shader);
    void addShaders(const QList<Shader*>& shaders);

    virtual bool link();

    bool isValid() const  { return mValid; }
    char* linkLog() const  { return mLinkLog; }

    virtual void bind() const;
    virtual void unbind() const;

    int uniformLocation(const QString& name);
    int uniformLocation(const char* name);

    int attributeLocation(const QString& name);
    int attributeLocation(const char* name);

    void invalidateLocations();

    bool setUniform(const char* name, float value);
    bool setUniform(const char* name, Eigen::Vector2f value);
    bool setUniform(const char* name, Eigen::Vector3f value);
    bool setUniform(const char* name, Eigen::Vector4f value);
    bool setUniform(const char* name, int value);

    GLuint glId() const  { return mGLId; }

protected:
    void init();

protected:
    GLuint mGLId;
    bool mValid;
    char* mLinkLog;
    QHash<QString, int>* mUniformLocations;
    QHash<QString, int>* mAttributeLocations;
};

}

#endif