/*
 * 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_OGLENUM_H
#define KEOS_OGLENUM_H

#include "KeosOGLPrerequisites.h"

namespace Keos
{
    //-----------------------------------------------------------------------
    /** Convert Keos enums/flags for OpenGL.
     */
    class COGLEnum
    {
    public :
        //! Structure of the formats of pixel
        struct TPixelFmt {GLenum Format, Internal, Type;};

        /** Buffer creation flags.
         */
        static ulong BufferFlags(ulong nFlags);

        /** Lock flags.
         */
        static ulong LockFlags(ulong nFlags);

        /** Matrix type.
         */
        static GLenum Get(TMatrixType Value);

        /** Matrix type for glGetFloatv, glGetIntegerv, ...
         */
        static GLenum GetMatrix(TMatrixType Value);

        /** Formats of pixel.
         */
        static TPixelFmt Get(TPixelFormat Value);

        /** Alpha-blending parameters.
         */
        static GLenum Get(TBlend Value);

        /** Textures operators.
         */
        static GLenum Get(TTextureOp Value);

        /** Arguments of mixing of the units of texture.
         */
        static GLenum Get(TTextureArg Value);

        /** Render parameters.
         */
        static GLenum Get(TRenderParameter Value);

    private :

        //! Matrix types
        static GLenum MatrixType[];
        //! Matrix types for glGetFloatv, glGetIntegerv, ....
        static GLenum MatrixType2[];
        //! Pixel formats
        static TPixelFmt PixelFormat[]; 
        //! Alpha-blending parameters
        static GLenum    Blend[];
        //! Textures operators
        static GLenum    TextureOp[];
        //! Arguments of mixing of the units of texture
        static GLenum    TextureArg[];
        //! Render parameters
        static GLenum    RenderParameter[];
    };

} // namespace Keos

#endif // KEOS_OGLENUM_H
