/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 * 
 * This program 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 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 Lesser 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, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#ifndef KEOS_SHADERSLOADER_H
#define KEOS_SHADERSLOADER_H

#include "KeosLoader.h"
#include "KeosShaderBase.h"
#include "KeosEnums.h"
#include "KeosLogger.h"
#include "Cg/cg.h"

namespace Keos
{
    //-----------------------------------------------------------------------
    /** Class managing the load of shaders.
     *  Use the Cg library.
     */
    class CShadersLoader : public ILoader<IShaderBase>
    {
    public :

        /** Build the loader.
         *  @param Type Type of the managed shaders.
         */
        CShadersLoader(TShaderType Type);

        /** Destruct the loader.
         */
        ~CShadersLoader();

        /** Load a shader from a file.
         *  @param strFilename Path of the file to be loaded.
         *  @return Pointer on the shader loaded.
         */
        virtual IShaderBase* LoadFromFile(const String& strFilename);

    private :

        /** Callback called in case of error Cg.
         */
        static void OnError();

        //! Cg context
        CGcontext   m_Context; 
        //! Type of the managed shaders.
        TShaderType m_Type;
    };

} // namespace Keos

#endif // KEOS_SHADERSLOADER_H
