view src/video/x11/SDL_x11modes.c @ 641:df178851293b

Date: 28 Jun 2003 22:42:52 +0100 From: Alan Swanson Subject: Re: [SDL] New XFree 4.3 Video Mode Patch I have a wee amendment that moves the qsort in set_best_resolution to only occur after failing to find an exact match only. This would make absolutely sure we get a user set mode. While I've never had any problems for my normal resolutions (1280x1024, 1024x768, 800x600 & 640,480) while closely examining the output from qsort I've noticed it doesn't seem to sort the modes fully. These is one definite wrong at 1152x768 and a few that just look wrong to me. From a program (attached) I made to examine this more easily. X has sorted its mode list using the same method as ours (plus frequency), and our user modes get inserted without any other movement. On the patch I've made I've also changed cmpmodes to sort on vertical resolution and then horizontal. Ie vertical is now most significant bit.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 28 Jun 2003 21:52:26 +0000
parents 6862d4294870
children 7c8deec1659c
line wrap: on
line source

/*
    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_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* Utilities for getting and setting the X display mode */

#include <stdlib.h>
#include <string.h>

#include "SDL_timer.h"
#include "SDL_error.h"
#include "SDL_events.h"
#include "SDL_events_c.h"
#include "SDL_x11video.h"
#include "SDL_x11wm_c.h"
#include "SDL_x11modes_c.h"
#include "SDL_x11image_c.h"

#ifdef HAVE_XINERAMA
#include <XFree86/extensions/Xinerama.h>
#endif 

#define MAX(a, b)        (a > b ? a : b)

#ifdef XFREE86_VM
Bool SDL_NAME(XF86VidModeGetModeInfo)(Display *dpy, int scr, SDL_NAME(XF86VidModeModeInfo) *info)
{
    SDL_NAME(XF86VidModeModeLine) *l = (SDL_NAME(XF86VidModeModeLine)*)((char*)info + sizeof info->dotclock);
    return SDL_NAME(XF86VidModeGetModeLine)(dpy, scr, &info->dotclock, l);
}
#endif /* XFREE86_VM */

#ifdef XFREE86_VM
static void save_mode(_THIS)
{
    memset(&saved_mode, 0, sizeof(saved_mode));
    SDL_NAME(XF86VidModeGetModeInfo)(SDL_Display,SDL_Screen,&saved_mode);
    SDL_NAME(XF86VidModeGetViewPort)(SDL_Display,SDL_Screen,&saved_view.x,&saved_view.y);
}
#endif

#ifdef XFREE86_VM
static void restore_mode(_THIS)
{
    SDL_NAME(XF86VidModeModeLine) mode;
    int unused;

    if ( SDL_NAME(XF86VidModeGetModeLine)(SDL_Display, SDL_Screen, &unused, &mode) ) {
        if ( (saved_mode.hdisplay != mode.hdisplay) ||
             (saved_mode.vdisplay != mode.vdisplay) ) {
            SDL_NAME(XF86VidModeSwitchToMode)(SDL_Display, SDL_Screen, &saved_mode);
        }
    }
    if ( (saved_view.x != 0) || (saved_view.y != 0) ) {
        SDL_NAME(XF86VidModeSetViewPort)(SDL_Display, SDL_Screen, saved_view.x, saved_view.y);
    }
}
#endif

#ifdef XFREE86_VM
static int cmpmodes(const void *va, const void *vb)
{
    const SDL_NAME(XF86VidModeModeInfo) *a = *(const SDL_NAME(XF86VidModeModeInfo)**)va;
    const SDL_NAME(XF86VidModeModeInfo) *b = *(const SDL_NAME(XF86VidModeModeInfo)**)vb;
    if( (a->vdisplay > b->vdisplay) && (a->hdisplay >= b->hdisplay) )
        return -1;
    return b->hdisplay - a->hdisplay;
}
#endif

static void get_real_resolution(_THIS, int* w, int* h);

static void set_best_resolution(_THIS, int width, int height)
{
#ifdef XFREE86_VM
    if ( use_vidmode ) {
        SDL_NAME(XF86VidModeModeLine) mode;
        SDL_NAME(XF86VidModeModeInfo) **modes;
        int i;
        int best_width = 0, best_height = 0;
        int nmodes;

        if ( SDL_NAME(XF86VidModeGetModeLine)(SDL_Display, SDL_Screen, &i, &mode) &&
             SDL_NAME(XF86VidModeGetAllModeLines)(SDL_Display,SDL_Screen,&nmodes,&modes)){
#ifdef XFREE86_DEBUG
            printf("Available modes (unsorted):\n");
            for ( i = 0; i < nmodes; ++i ) {
                printf("Mode %d: %d x %d @ %d\n", i,
                        modes[i]->hdisplay, modes[i]->vdisplay,
                        1000 * modes[i]->dotclock / (modes[i]->htotal *
                        modes[i]->vtotal) );
            }
#endif
            for ( i = 0; i < nmodes ; i++ ) {
                if ( (modes[i]->hdisplay == width) &&
                     (modes[i]->vdisplay == height) )
                    goto match;
            }
            qsort(modes, nmodes, sizeof *modes, cmpmodes);
            for ( i = nmodes-1; i >= 0 ; i-- ) {
		if ( ! best_width ) {
                    if ( (modes[i]->hdisplay >= width) &&
                         (modes[i]->vdisplay >= height) ) {
                        best_width = modes[i]->hdisplay;
                        best_height = modes[i]->vdisplay;
                    }
                } else {
                    if ( (modes[i]->hdisplay != best_width) ||
                         (modes[i]->vdisplay != best_height) ) {
                        i++;
                        break;
                    }
                }
            }
       match:
            if ( (modes[i]->hdisplay != mode.hdisplay) ||
                 (modes[i]->vdisplay != mode.vdisplay) ) {
                SDL_NAME(XF86VidModeSwitchToMode)(SDL_Display, SDL_Screen, modes[i]);
            }
            XFree(modes);
        }
    }
#endif /* XFREE86_VM */

                                /* XiG */
#ifdef HAVE_XIGXME
#ifdef XIG_DEBUG
    fprintf(stderr, "XME: set_best_resolution(): w = %d, h = %d\n",
            width, height);
#endif
    if ( SDL_modelist ) {
        int i;

        for ( i=0; SDL_modelist[i]; ++i ) {
            if ( (SDL_modelist[i]->w >= width) &&
                 (SDL_modelist[i]->h >= height) ) {
                break;
            }
        }
        
        if ( SDL_modelist[i] ) { /* found one, lets try it */
            int w, h;        

            /* check current mode so we can avoid uneccessary mode changes */
            get_real_resolution(this, &w, &h);

            if ( (SDL_modelist[i]->w != w) || (SDL_modelist[i]->h != h) ) {
# ifdef XIG_DEBUG
                fprintf(stderr, "XME: set_best_resolution: "
                        "XiGMiscChangeResolution: %d %d\n",
                        SDL_modelist[s]->w, SDL_modelist[s]->h);
# endif
                XiGMiscChangeResolution(SDL_Display, 
                                        SDL_Screen,
                                        0, /* view */
                                        SDL_modelist[i]->w, 
                                        SDL_modelist[i]->h, 
                                        0);
                XSync(SDL_Display, False);
            }
        }
    }
#endif /* HAVE_XIGXME */

}

static void get_real_resolution(_THIS, int* w, int* h)
{
#ifdef XFREE86_VM
    if ( use_vidmode ) {
        SDL_NAME(XF86VidModeModeLine) mode;
        int unused;

        if ( SDL_NAME(XF86VidModeGetModeLine)(SDL_Display, SDL_Screen, &unused, &mode) ) {
            *w = mode.hdisplay;
            *h = mode.vdisplay;
            return;
        }
    }
#endif

#ifdef HAVE_XIGXME
    if ( use_xme ) {
        int ractive;
        XiGMiscResolutionInfo *modelist;

        XiGMiscQueryResolutions(SDL_Display, SDL_Screen,
                                0, /* view */
                                &ractive, &modelist);
        *w = modelist[ractive].width;
        *h = modelist[ractive].height;
#ifdef XIG_DEBUG
        fprintf(stderr, "XME: get_real_resolution: w = %d h = %d\n", *w, *h);
#endif
        XFree(modelist);
        return;
    }
#endif /* XIG_XME */

    *w = DisplayWidth(SDL_Display, SDL_Screen);
    *h = DisplayHeight(SDL_Display, SDL_Screen);
}

/* Called after mapping a window - waits until the window is mapped */
void X11_WaitMapped(_THIS, Window win)
{
    XEvent event;
    do {
        XMaskEvent(SDL_Display, StructureNotifyMask, &event);
    } while ( (event.type != MapNotify) || (event.xmap.event != win) );
}

/* Called after unmapping a window - waits until the window is unmapped */
void X11_WaitUnmapped(_THIS, Window win)
{
    XEvent event;
    do {
        XMaskEvent(SDL_Display, StructureNotifyMask, &event);
    } while ( (event.type != UnmapNotify) || (event.xunmap.event != win) );
}

static void move_cursor_to(_THIS, int x, int y)
{
    XWarpPointer(SDL_Display, None, SDL_Root, 0, 0, 0, 0, x, y);
}

static int add_visual(_THIS, int depth, int class)
{
    XVisualInfo vi;
    if(XMatchVisualInfo(SDL_Display, SDL_Screen, depth, class, &vi)) {
        int n = this->hidden->nvisuals;
        this->hidden->visuals[n].depth = vi.depth;
        this->hidden->visuals[n].visual = vi.visual;
        this->hidden->nvisuals++;
    }
    return(this->hidden->nvisuals);
}
static int add_visual_byid(_THIS, const char *visual_id)
{
    XVisualInfo *vi, template;
    int nvis;

    if ( visual_id ) {
        memset(&template, 0, (sizeof template));
        template.visualid = strtol(visual_id, NULL, 0);
        vi = XGetVisualInfo(SDL_Display, VisualIDMask, &template, &nvis);
        if ( vi ) {
            int n = this->hidden->nvisuals;
            this->hidden->visuals[n].depth = vi->depth;
            this->hidden->visuals[n].visual = vi->visual;
            this->hidden->nvisuals++;
            XFree(vi);
        }
    }
    return(this->hidden->nvisuals);
}

/* Global for the error handler */
int vm_event, vm_error = -1;

int X11_GetVideoModes(_THIS)
{
#ifdef XFREE86_VM
    int buggy_X11;
    int vm_major, vm_minor;
    int nmodes;
    SDL_NAME(XF86VidModeModeInfo) **modes;
#endif
#ifdef HAVE_XIGXME
    int xme_major, xme_minor;
    int ractive, nummodes;
    XiGMiscResolutionInfo *modelist;
#endif
    int i, n;
    int screen_w;
    int screen_h;

    vm_error = -1;
    use_vidmode = 0;
    screen_w = DisplayWidth(SDL_Display, SDL_Screen);
    screen_h = DisplayHeight(SDL_Display, SDL_Screen);

#ifdef XFREE86_VM
    /* Metro-X 4.3.0 and earlier has a broken implementation of
       XF86VidModeGetAllModeLines() - it hangs the client.
     */
    buggy_X11 = 0;
    if ( strcmp(ServerVendor(SDL_Display), "Metro Link Incorporated") == 0 ) {
        FILE *metro_fp;

        metro_fp = fopen("/usr/X11R6/lib/X11/Metro/.version", "r");
        if ( metro_fp != NULL ) {
            int major, minor, patch, version;
            major = 0; minor = 0; patch = 0;
            fscanf(metro_fp, "%d.%d.%d", &major, &minor, &patch);
            version = major*100+minor*10+patch;
            if ( version < 431 ) {
                buggy_X11 = 1;
            }
            fclose(metro_fp);
        }
    }
#if defined(__alpha__) || defined(__sparc64__) || defined(__powerpc__)
    /* The alpha, sparc64 and PPC XFree86 servers are also buggy */
    buggy_X11 = 1;
#endif
    /* Enumerate the available fullscreen modes */
    if ( ! buggy_X11 ) {
        if ( SDL_NAME(XF86VidModeQueryExtension)(SDL_Display, &vm_event, &vm_error) &&
              SDL_NAME(XF86VidModeQueryVersion)(SDL_Display, &vm_major, &vm_minor) ) {
#ifdef BROKEN_XFREE86_4001
#ifdef X_XF86VidModeGetDotClocks  /* Compiled under XFree86 4.0 */
                /* Earlier X servers hang when doing vidmode */
                if ( vm_major < 2 ) {
#ifdef XFREE86_DEBUG
                    printf("Compiled under XFree86 4.0, server is XFree86 3.X\n");
#endif
                    buggy_X11 = 1;
                }
#else
                /* XFree86 3.X code works with XFree86 4.0 servers */;
#endif /* XFree86 4.0 */
#endif /* XFree86 4.02 and newer are fixed wrt backwards compatibility */
        } else {
            buggy_X11 = 1;
        }
    }
    if ( ! buggy_X11 &&
         SDL_NAME(XF86VidModeGetAllModeLines)(SDL_Display, SDL_Screen,&nmodes,&modes) ) {

#ifdef XFREE86_DEBUG
        printf("Available modes: (sorted)\n");
        for ( i = 0; i < nmodes; ++i ) {
            printf("Mode %d: %d x %d @ %d\n", i,
                    modes[i]->hdisplay, modes[i]->vdisplay,
                    1000 * modes[i]->dotclock / (modes[i]->htotal *
                    modes[i]->vtotal) );
        }
#endif

        qsort(modes, nmodes, sizeof *modes, cmpmodes);
        SDL_modelist = (SDL_Rect **)malloc((nmodes+2)*sizeof(SDL_Rect *));
        if ( SDL_modelist ) {
            n = 0;
            for ( i=0; i<nmodes; ++i ) {
                int w, h;

                /* Check to see if we should add the screen size (Xinerama) */
                w = modes[i]->hdisplay;
                h = modes[i]->vdisplay;
                if ( (screen_w * screen_h) >= (w * h) ) {
                    if ( (screen_w != w) || (screen_h != h) ) {
                        SDL_modelist[n] = (SDL_Rect *)malloc(sizeof(SDL_Rect));
                        if ( SDL_modelist[n] ) {
                            SDL_modelist[n]->x = 0;
                            SDL_modelist[n]->y = 0;
                            SDL_modelist[n]->w = screen_w;
                            SDL_modelist[n]->h = screen_h;
                            ++n;
                        }
                    }
                    screen_w = 0;
                    screen_h = 0;
                }

                /* Add the size from the video mode list */
                SDL_modelist[n] = (SDL_Rect *)malloc(sizeof(SDL_Rect));
                if ( SDL_modelist[n] == NULL ) {
                    break;
                }
                SDL_modelist[n]->x = 0;
                SDL_modelist[n]->y = 0;
                SDL_modelist[n]->w = w;
                SDL_modelist[n]->h = h;
                ++n;
            }
            SDL_modelist[n] = NULL;
        }
        XFree(modes);

        use_vidmode = vm_major * 100 + vm_minor;
        save_mode(this);
    }
#endif /* XFREE86_VM */

                                /* XiG */
#ifdef HAVE_XIGXME
    /* first lets make sure we have the extension, and it's at least v2.0 */
    if (XiGMiscQueryVersion(SDL_Display, &xme_major, &xme_minor)) {
#ifdef XIG_DEBUG
        fprintf(stderr, "XME: XiGMiscQueryVersion: V%d.%d\n",
                xme_major, xme_minor);
#endif
        /* work around a XiGMisc bogosity in our version of libXext */
        if (xme_major == 0 && xme_major == 0) {
            /* Ideally libxme would spit this out, but the problem is that
               the right Query func will never be called if using the bogus
               libXext version.
             */
            fprintf(stderr, 
"XME: If you are using Xi Graphics CDE and a Summit server, you need to\n"
"XME: get the libXext update from our ftp site before fullscreen switching\n"
"XME: will work.  Fullscreen switching is only supported on Summit Servers\n");
          }
    } else {
        /* not there. Bummer. */
        xme_major = xme_minor = 0;
    }

    modelist = NULL;
    if (xme_major >= 2 && (nummodes = XiGMiscQueryResolutions(SDL_Display, 
                                            SDL_Screen,
                                            0, /* view */
                                            &ractive, 
                                            &modelist)) > 1)
    {                                /* then we actually have some */
        int j;

#ifdef XIG_DEBUG
        fprintf(stderr, "XME: nummodes = %d, active mode = %d\n",
                nummodes, ractive);
#endif

        SDL_modelist = (SDL_Rect **)malloc((nummodes+1)*sizeof(SDL_Rect *));

                                /* we get the list already sorted in */
                                /* descending order.  We'll copy it in */
                                /* reverse order so SDL is happy */
        if (SDL_modelist) {
            for ( i=0, j=nummodes-1; j>=0; i++, j-- ) {
                if ((SDL_modelist[i] = 
                     (SDL_Rect *)malloc(sizeof(SDL_Rect))) == NULL)
                  break;
#ifdef XIG_DEBUG
                fprintf(stderr, "XME: mode = %4d, w = %4d, h = %4d\n",
                       i, modelist[i].width, modelist[i].height);
#endif
                
                SDL_modelist[i]->x = 0;
                SDL_modelist[i]->y = 0;
                SDL_modelist[i]->w = modelist[j].width;
                SDL_modelist[i]->h = modelist[j].height;
                
            }
            SDL_modelist[i] = NULL; /* terminator */
        }
        use_xme = 1;
        saved_res = modelist[ractive]; /* save the current resolution */
    } else {
        use_xme = 0;
    }
    if ( modelist ) {
        XFree(modelist);
    }
#endif /* HAVE_XIGXME */

    {
        static int depth_list[] = { 32, 24, 16, 15, 8 };
        int j, np;
        int use_directcolor = 1;
        XPixmapFormatValues *pf;

        /* Search for the visuals in deepest-first order, so that the first
           will be the richest one */
        if ( getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) {
                use_directcolor = 0;
        }
        this->hidden->nvisuals = 0;
        if ( ! add_visual_byid(this, getenv("SDL_VIDEO_X11_VISUALID")) ) {
                for ( i=0; i<SDL_TABLESIZE(depth_list); ++i ) {
                        if ( depth_list[i] > 8 ) {
                                if ( use_directcolor ) {
                                        add_visual(this, depth_list[i], DirectColor);
                                }
                                add_visual(this, depth_list[i], TrueColor);
                        } else {
                                add_visual(this, depth_list[i], PseudoColor);
                                add_visual(this, depth_list[i], StaticColor);
                        }
                }
        }
        if ( this->hidden->nvisuals == 0 ) {
            SDL_SetError("Found no sufficiently capable X11 visuals");
            return -1;
        }
            
        /* look up the pixel quantum for each depth */
        pf = XListPixmapFormats(SDL_Display, &np);
        for(i = 0; i < this->hidden->nvisuals; i++) {
            int d = this->hidden->visuals[i].depth;
            for(j = 0; j < np; j++)
                if(pf[j].depth == d)
                    break;
            this->hidden->visuals[i].bpp = j < np ? pf[j].bits_per_pixel : d;
        }

        XFree(pf);
    }

    if ( SDL_modelist == NULL ) {
        SDL_modelist = (SDL_Rect **)malloc((1+1)*sizeof(SDL_Rect *));
        if ( SDL_modelist ) {
            n = 0;
            SDL_modelist[n] = (SDL_Rect *)malloc(sizeof(SDL_Rect));
            if ( SDL_modelist[n] ) {
                SDL_modelist[n]->x = 0;
                SDL_modelist[n]->y = 0;
                SDL_modelist[n]->w = screen_w;
                SDL_modelist[n]->h = screen_h;
                ++n;
            }
            SDL_modelist[n] = NULL;
        }
    }

#if defined(XFREE86_DEBUG) || defined(XIG_DEBUG)
    if ( use_vidmode ) {
        printf("XFree86 VidMode is enabled\n");
    }

#ifdef HAVE_XIGXME
    if ( use_xme )
      printf("Xi Graphics XME fullscreen is enabled\n");
    else
      printf("Xi Graphics XME fullscreen is not available\n");
#endif 

    if ( SDL_modelist ) {
        printf("X11 video mode list:\n");
        for ( i=0; SDL_modelist[i]; ++i ) {
            printf("\t%dx%d\n", SDL_modelist[i]->w, SDL_modelist[i]->h);
        }
    }
#endif /* XFREE86_DEBUG || XIG_DEBUG */

    /* The default X/Y fullscreen offset is 0/0 */
    xinerama_x = 0;
    xinerama_y = 0;

#ifdef HAVE_XINERAMA
    /* Query Xinerama extention */
    if ( SDL_NAME(XineramaQueryExtension)(SDL_Display, &i, &i) &&
         SDL_NAME(XineramaIsActive)(SDL_Display) ) {
        /* Find out which screen is the desired one */
        int desired = 0;
        int screens;
        SDL_NAME(XineramaScreenInfo) *xinerama;

#ifdef XINERAMA_DEBUG
        printf("X11 detected Xinerama:\n");
#endif
#if 0 /* Apparently the vidmode extension doesn't work with Xinerama */
        const char *variable = getenv("SDL_VIDEO_X11_XINERAMA_SCREEN");
        if ( variable ) {
                desired = atoi(variable);
        }
#endif
        xinerama = SDL_NAME(XineramaQueryScreens)(SDL_Display, &screens);
        for ( i = 0; i < screens; i++ ) {
#ifdef XINERAMA_DEBUG
            printf("xinerama %d: %dx%d+%d+%d\n",
                xinerama[i].screen_number,
                xinerama[i].width, xinerama[i].height,
                xinerama[i].x_org, xinerama[i].y_org);
#endif
            if ( xinerama[i].screen_number == desired ) {
                xinerama_x = xinerama[i].x_org;
                xinerama_y = xinerama[i].y_org;
            }
        }
        XFree(xinerama);
    }
#endif /* HAVE_XINERAMA */

    return 0;
}

int X11_SupportedVisual(_THIS, SDL_PixelFormat *format)
{
    int i;
    for(i = 0; i < this->hidden->nvisuals; i++)
        if(this->hidden->visuals[i].bpp == format->BitsPerPixel)
            return 1;
    return 0;
}

SDL_Rect **X11_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
{
    if ( X11_SupportedVisual(this, format) ) {
        if ( flags & SDL_FULLSCREEN ) {
            return(SDL_modelist);
        } else {
            return((SDL_Rect **)-1);
        }
    } else {
        return((SDL_Rect **)0);
    }
}

void X11_FreeVideoModes(_THIS)
{
    int i;

    if ( SDL_modelist ) {
        for ( i=0; SDL_modelist[i]; ++i ) {
            free(SDL_modelist[i]);
        }
        free(SDL_modelist);
        SDL_modelist = NULL;
    }
}

int X11_ResizeFullScreen(_THIS)
{
    int x, y;
    int real_w, real_h;
    int screen_w;
    int screen_h;

    screen_w = DisplayWidth(SDL_Display, SDL_Screen);
    screen_h = DisplayHeight(SDL_Display, SDL_Screen);

    x = xinerama_x;
    y = xinerama_y;
    if ( currently_fullscreen ) {
        /* Switch resolution and cover it with the FSwindow */
        move_cursor_to(this, x, y);
        set_best_resolution(this, current_w, current_h);
        move_cursor_to(this, x, y);
        get_real_resolution(this, &real_w, &real_h);
        if ( current_w > real_w ) {
            real_w = MAX(real_w, screen_w);
        }
        if ( current_h > real_h ) {
            real_h = MAX(real_h, screen_h);
        }
        XMoveResizeWindow(SDL_Display, FSwindow, x, y, real_w, real_h);
        move_cursor_to(this, real_w/2, real_h/2);

        /* Center and reparent the drawing window */
        x = (real_w - current_w)/2;
        y = (real_h - current_h)/2;
        XReparentWindow(SDL_Display, SDL_Window, FSwindow, x, y);
        /* FIXME: move the mouse to the old relative location */
        XSync(SDL_Display, True);   /* Flush spurious mode change events */
    }
    return(1);
}

void X11_QueueEnterFullScreen(_THIS)
{
    switch_waiting = 0x01 | SDL_FULLSCREEN;
    switch_time = SDL_GetTicks() + 1500;
#if 0 /* This causes a BadMatch error if the window is iconified (not needed) */
    XSetInputFocus(SDL_Display, WMwindow, RevertToNone, CurrentTime);
#endif
}

int X11_EnterFullScreen(_THIS)
{
    int okay;
#if 0
    Window tmpwin, *windows;
    int i, nwindows;
#endif
    int real_w, real_h;
    int screen_w;
    int screen_h;

    okay = 1;
    if ( currently_fullscreen ) {
        return(okay);
    }

    /* Ungrab the input so that we can move the mouse around */
    X11_GrabInputNoLock(this, SDL_GRAB_OFF);

    /* Map the fullscreen window to blank the screen */
    screen_w = DisplayWidth(SDL_Display, SDL_Screen);
    screen_h = DisplayHeight(SDL_Display, SDL_Screen);
    get_real_resolution(this, &real_w, &real_h);
    if ( current_w > real_w ) {
        real_w = MAX(real_w, screen_w);
    }
    if ( current_h > real_h ) {
        real_h = MAX(real_h, screen_h);
    }
    XMoveResizeWindow(SDL_Display, FSwindow,
                      xinerama_x, xinerama_y, real_w, real_h);
    XMapRaised(SDL_Display, FSwindow);
    X11_WaitMapped(this, FSwindow);

#if 0 /* This seems to break WindowMaker in focus-follows-mouse mode */
    /* Make sure we got to the top of the window stack */
    if ( XQueryTree(SDL_Display, SDL_Root, &tmpwin, &tmpwin,
                            &windows, &nwindows) && windows ) {
        /* If not, try to put us there - if fail... oh well */
        if ( windows[nwindows-1] != FSwindow ) {
            tmpwin = windows[nwindows-1];
            for ( i=0; i<nwindows; ++i ) {
                if ( windows[i] == FSwindow ) {
                    memcpy(&windows[i], &windows[i+1],
                           (nwindows-i-1)*sizeof(windows[i]));
                    break;
                }
            }
            windows[nwindows-1] = FSwindow;
            XRestackWindows(SDL_Display, windows, nwindows);
            XSync(SDL_Display, False);
        }
        XFree(windows);
    }
#else
    XRaiseWindow(SDL_Display, FSwindow);
#endif

#ifdef XFREE86_VM
    /* Save the current video mode */
    if ( use_vidmode ) {
        SDL_NAME(XF86VidModeLockModeSwitch)(SDL_Display, SDL_Screen, True);
    }
#endif
    currently_fullscreen = 1;

    /* Set the new resolution */
    okay = X11_ResizeFullScreen(this);
    if ( ! okay ) {
        X11_LeaveFullScreen(this);
    }
    /* Set the colormap */
    if ( SDL_XColorMap ) {
        XInstallColormap(SDL_Display, SDL_XColorMap);
    }
    if ( okay )
        X11_GrabInputNoLock(this, this->input_grab | SDL_GRAB_FULLSCREEN);

    /* We may need to refresh the screen at this point (no backing store)
       We also don't get an event, which is why we explicitly refresh. */
    if ( this->screen ) {
        if ( this->screen->flags & SDL_OPENGL ) {
            SDL_PrivateExpose();
        } else {
            X11_RefreshDisplay(this);
        }
    }

    return(okay);
}

int X11_LeaveFullScreen(_THIS)
{
    if ( currently_fullscreen ) {
        XReparentWindow(SDL_Display, SDL_Window, WMwindow, 0, 0);
#ifdef XFREE86_VM
        if ( use_vidmode ) {
            restore_mode(this);
            SDL_NAME(XF86VidModeLockModeSwitch)(SDL_Display, SDL_Screen, False);
        }
#endif

#ifdef HAVE_XIGXME
        if ( use_xme ) {
            int rw, rh;        
            
            /* check current mode so we can avoid uneccessary mode changes */
            get_real_resolution(this, &rw, &rh);

            if (rw != saved_res.width || rh != saved_res.height) {
                XiGMiscChangeResolution(SDL_Display, 
                                        SDL_Screen,
                                        0, /* view */
                                        saved_res.width, 
                                        saved_res.height,
                                        0);
                XSync(SDL_Display, False);
            }
        }
#endif

        XUnmapWindow(SDL_Display, FSwindow);
        X11_WaitUnmapped(this, FSwindow);
        XSync(SDL_Display, True);   /* Flush spurious mode change events */
        currently_fullscreen = 0;
    }
    /* If we get popped out of fullscreen mode for some reason, input_grab
       will still have the SDL_GRAB_FULLSCREEN flag set, since this is only
       temporary.  In this case, release the grab unless the input has been
       explicitly grabbed.
     */
    X11_GrabInputNoLock(this, this->input_grab & ~SDL_GRAB_FULLSCREEN);

    /* We may need to refresh the screen at this point (no backing store)
       We also don't get an event, which is why we explicitly refresh. */
    if ( this->screen ) {
        if ( this->screen->flags & SDL_OPENGL ) {
            SDL_PrivateExpose();
        } else {
            X11_RefreshDisplay(this);
        }
    }

    return(0);
}