/**

 * $Id$

 *

 * GL-based support functions 

 *

 * Copyright (c) 2005 Nathan Keynes.

 *

 * 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.

 */

#ifndef lxdream_glutil_H

#define lxdream_glutil_H

#include <stdio.h>

#include "display.h"

#ifdef __cplusplus

extern "C" {

#endif

/**

 * Test if a specific extension is supported. From opengl.org

 * @param extension extension name to check for

 * @return TRUE if supported, otherwise FALSE.

 */

gboolean isGLExtensionSupported( const char *extension );

/**

 * Dump GL information to the output stream, usually for debugging purposes

 */

void glPrintInfo( FILE *out );

/**

 * Check for a GL error and print a message if there is one

 * @param context If not null, a string to be printed along side an error message

 * @return FALSE if there was an error, otherwise TRUE

 */

gboolean gl_check_error( const char *context );

/**

 * Test if secondary color (GL_COLOR_SUM) is supported.

 */

gboolean isGLSecondaryColorSupported();

gboolean isGLVertexBufferSupported();

gboolean isGLVertexRangeSupported();

gboolean isGLPixelBufferSupported();

gboolean isGLMultitextureSupported();

gboolean isGLMirroredTextureSupported();

/****** Extension variant wrangling *****/

/****** Shader handling (gl_sl.c) *****/

gboolean glsl_is_supported(void);

const char *glsl_get_version(void);

gboolean glsl_load_shaders( );

void glsl_unload_shaders(void);

void glsl_clear_shader();

/* Convenience formatting function for driver use */

void fprint_extensions( FILE *out, const char *extensions );

#ifdef __cplusplus

}

#endif

#endif /* !lxdream_glutil_H */