static const char rcsid[] = 
	"$Id$";

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif

#include <stdlib.h>
#include <SDL.h>

#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/va.h"
#include "QF/vid.h"

extern SDL_Surface *screen;


void
VID_SDL_GammaCheck (void)
{
	Uint16 redtable[256], greentable[256], bluetable[256];

	if (SDL_GetGammaRamp(redtable, greentable, bluetable) < 0)
		vid_gamma_avail = false;
	else
		vid_gamma_avail = true;
}

void
VID_SetCaption (const char *text)
{
	if (text && *text) {
		char		*temp = strdup (text);

		SDL_WM_SetCaption (va ("%s %s: %s", PROGRAM, VERSION, temp), NULL);
		free (temp);
	} else {
		SDL_WM_SetCaption (va ("%s %s", PROGRAM, VERSION), NULL);
	}
}

qboolean
VID_SetGamma (double gamma)
{
	return SDL_SetGamma((float) gamma, (float) gamma, (float) gamma); 
}

void
VID_Shutdown (void)
{
	SDL_Quit ();
}

void
VID_UpdateFullscreen (cvar_t *vid_fullscreen)
{
	if (!vid.initialized)
		return;
	if ((vid_fullscreen->int_val && !(screen->flags & SDL_FULLSCREEN))
		|| (!vid_fullscreen->int_val && screen->flags & SDL_FULLSCREEN))
		if (!SDL_WM_ToggleFullScreen (screen))
			Con_Printf ("VID_UpdateFullscreen: error setting fullscreen\n");
}

void
VID_Init_Cvars ()
{
	vid_fullscreen = Cvar_Get ("vid_fullscreen", "0", CVAR_ARCHIVE,
							   VID_UpdateFullscreen,
							   "Toggles fullscreen mode");
	vid_system_gamma = Cvar_Get ("vid_system_gamma", "1", CVAR_ARCHIVE, NULL,
								 "Use system gamma control if available");
}