/**

  * $Id$

  *

  * 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 */