/**

 * $Id: gl_common.h,v 1.3 2007-10-08 11:49:35 nkeynes Exp $

 *

 * Parent for all X11 display drivers.

 *

 * 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 video_gl_common_H

#define video_gl_common_H

#include "display.h"

/**

 * 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 );

gboolean hasRequiredGLExtensions();

/**

 * Generic GL routine to draw the given frame buffer in the display view.

 */

gboolean gl_display_frame_buffer( frame_buffer_t frame );

/**

 * Generic GL routine to blank the display view with the specified colour.

 */

gboolean gl_display_blank( uint32_t colour );

/**

 * Generic GL read_render_buffer. This function assumes that the caller

 * has already set the appropriate glReadBuffer(); in other words, unless

 * there's only one buffer this needs to be wrapped.

 */

gboolean gl_read_render_buffer( render_buffer_t buffer, unsigned char *target );

/****** FBO handling (gl_fbo.c) ******/

gboolean gl_fbo_is_supported();

void gl_fbo_shutdown();

void gl_fbo_init( display_driver_t driver );

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

gboolean glsl_is_supported(void);

gboolean glsl_load_shaders( const char *vert_shader, const char *frag_shader );

void glsl_unload_shaders(void);

extern const char *glsl_vertex_shader_src;

extern const char *glsl_fragment_shader_src;

#endif /* !video_gl_common_H */