/*    SDL - Simple DirectMedia Layer    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga    This library is free software; you can redistribute it and/or    modify it under the terms of the GNU Library General Public    License as published by the Free Software Foundation; either    version 2 of the License, or (at your option) any later version.    This library 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    Library General Public License for more details.    You should have received a copy of the GNU Library General Public    License along with this library; if not, write to the Free    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA    Sam Lantinga    slouken@libsdl.org*/#ifdef SAVE_RCSIDstatic char rcsid = "@(#) $Id: SDL_x11dga.c,v 1.5 2002/03/06 11:23:08 slouken Exp $";#endif/* This is currently only used to enable DGA mouse.   The new fullscreen code makes it very difficult to handle DGA dynamically.   There will be a completely separate DGA driver that is fullscreen-only.*/#include <stdlib.h>		/* For getenv() */#include "SDL_video.h"#include "SDL_cursor_c.h"#include "SDL_x11dga_c.h"/* Global for the error handler */int dga_event, dga_error = -1;void X11_EnableDGAMouse(_THIS){#ifdef XFREE86_DGAMOUSE    int dga_major, dga_minor;    int use_dgamouse;    const char *env_use_dgamouse;    /* Check configuration to see if we should use DGA mouse */#ifdef DEFAULT_DGAMOUSE    use_dgamouse = 1;#else    use_dgamouse = 0;#endif    env_use_dgamouse = getenv("SDL_VIDEO_X11_DGAMOUSE");    if ( env_use_dgamouse ) {        use_dgamouse = atoi(env_use_dgamouse);    }    /* Check for buggy X servers */    if ( use_dgamouse && BUGGY_XFREE86(==, 4000) ) {        use_dgamouse = 0;    }    /* Only use DGA mouse if the cursor is not showing (in relative mode) */    if ( use_dgamouse && local_X11 && !(using_dga & DGA_MOUSE) &&         SDL_NAME(XF86DGAQueryExtension)(SDL_Display, &dga_event, &dga_error) &&         SDL_NAME(XF86DGAQueryVersion)(SDL_Display, &dga_major, &dga_minor) ) {	if ( SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, XF86DGADirectMouse) ) {            using_dga |= DGA_MOUSE;        }    }#endif /* XFREE86_DGAMOUSE */}/* Argh.  Glide resets DGA mouse mode when it makes the context current! */void X11_CheckDGAMouse(_THIS){#ifdef XFREE86_DGAMOUSE    int flags;    if ( using_dga & DGA_MOUSE ) {        SDL_NAME(XF86DGAQueryDirectVideo)(SDL_Display, SDL_Screen, &flags);        if ( ! (flags & XF86DGADirectMouse) ) {                SDL_NAME(XF86DGADirectVideo)(SDL_Display,SDL_Screen,XF86DGADirectMouse);        }    }#endif}void X11_DisableDGAMouse(_THIS){#ifdef XFREE86_DGAMOUSE    if ( using_dga & DGA_MOUSE ) {	SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, 0);        using_dga &= ~DGA_MOUSE;    }#endif /* XFREE86_DGAMOUSE */}