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view src/video/Xext/Xxf86vm/XF86VMode.c @ 4384:6800e2560310 SDL-1.2

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Fixed bugs #882 and 865, re-opening bug #634 Ronald Lamprecht to SDL Hi, Sam Lantinga wrote: The problem with that fix is that it breaks IME events again. Maybe we can handle keyboard events differently to prevent this issue? Spending an hour reading MSDN, analysing SDL and another hour testing the reality on XP I am really wondering how patch r4990 could have ever worked in any situation. It's main effect is to break the unicode translation and causing spurious activation events! Why does TranslateMessage(&msg) nothing useful? Simply because it does not affect "msg" at all! All keyboard events are dispatched without the slightest change (see MSDN). TranslateMessage() just appends additional WM_CHAR, WM_DEADCHAR, WM_SYSCHAR, WM_SYSDEADCHAR event messages to the queue. But I could not find any SDL event handling routine that catches these events and transforms them to proper SDL keyevents while eliminating the corresponding WM_KEYDOWN, etc. events. Thus any IME input like the '@' generated by "Alt + 6(Numpad) + 4(Numpad)" is simply lost. But the situation is even worse! Up to r4990 the TranslateKey()/ToUnicode() calls did evaluate dead keys and did deliver proper key events for subsequent key strokes like '´' + 'e' resulting in 'é'. ToUnicode() needs proper key state informations to be able to handle these substitutions. But unfortunatly TranslateMessage() needs the same state information and eats it up while generating the WM_CHAR messages :-( Thus the current 1.2.14 breakes the partial IME support of previous releases, too. The key state race condition between ToUnicode() and TranslateMessage() requires to avoid any ToUnicode() usage for receiving proper WM_CHAR, etc. messages generated by TranslateMessage(). (Yes - the '@' and 'é' appear as WM_CHAR messages when unicode is switched off). The spurious SDL activation events are *not* caused by additional WM_ACTIVATE Windows messages! Besides DIB_HandleMessage() SDL_PrivateAppActive() is called by another source which I am not yet aware of - any hints? Thus I do strongly recommend the deletion of the TranslateMessage(&msg) call as a quick fix. A proper support of unicode and IME requires a clean SDL keyboard input concept first. Which SDL keyboards events should be transmitted to the app when the user presses '´' + 'e' ? Within the current unicode handling the first key stroke is hidden. Even though ToUnicode() delivers the proper key SDL does ignore it in TranslateKey(). Just the composed key event is transmitted to the app. That is what you expect for text input, but the app can no longer use keys like '^' as a key button because it will never receive a key event for it! With a given concept it seems to be necessary to regenerate SDL key events out of the WM_CHAR, etc. events and to drop all related direct WM_KEYDOWN, etc. events while the remaining basic WM_KEYDOWN, etc. events would still have to result in SDL key events. Anyway the source of the spurious WM_ACTIVATE should be located to avoid future trouble. Greets, Ronald
author Sam Lantinga <slouken@libsdl.org>
date Tue, 17 Nov 2009 04:59:13 +0000
parents db4007f17bc8
children
line wrap: on
line source

/* $XConsortium: XF86VMode.c /main/2 1995/11/14 18:17:58 kaleb $ */
/* $XFree86: xc/lib/Xxf86vm/XF86VMode.c,v 3.32 2001/07/25 15:04:54 dawes Exp $ */
/*

Copyright (c) 1995  Kaleb S. KEITHLEY

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL Kaleb S. KEITHLEY BE LIABLE FOR ANY CLAIM, DAMAGES 
OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of Kaleb S. KEITHLEY 
shall not be used in advertising or otherwise to promote the sale, use 
or other dealings in this Software without prior written authorization
from Kaleb S. KEITHLEY.

*/
/* $XConsortium: XF86VMode.c /main/4 1996/01/16 07:52:25 kaleb CHECKEDOUT $ */

/* THIS IS NOT AN X CONSORTIUM STANDARD */

#define NEED_EVENTS
#define NEED_REPLIES

#ifndef XBUILD_IN_CLIENT
/* Apparently some X11 systems can't include this multiple times... */
#ifndef SDL_INCLUDED_XLIBINT_H
#define SDL_INCLUDED_XLIBINT_H 1
#include <X11/Xlibint.h>
#endif
#include "../extensions/xf86vmstr.h"
#include "../extensions/Xext.h"
#include "../extensions/extutil.h"
#else
#include "include/extensions/xf86vmstr.h"
#include "include/extensions/Xext.h"
#include "include/extensions/extutil.h"
#endif

#ifdef DEBUG
#include <stdio.h>
#endif

#ifndef MODE_BAD
#define MODE_BAD 255
#endif

static XExtensionInfo _xf86vidmode_info_data;
static XExtensionInfo *xf86vidmode_info = &_xf86vidmode_info_data;
static char *xf86vidmode_extension_name = XF86VIDMODENAME;

#define XF86VidModeCheckExtension(dpy,i,val) \
  XextCheckExtension (dpy, i, xf86vidmode_extension_name, val)

/*****************************************************************************
 *                                                                           *
 *			   private utility routines                          *
 *                                                                           *
 *****************************************************************************/

static XEXT_CLOSE_DISPLAY_PROTO(close_display);
static /* const */ XExtensionHooks xf86vidmode_extension_hooks = {
    NULL,				/* create_gc */
    NULL,				/* copy_gc */
    NULL,				/* flush_gc */
    NULL,				/* free_gc */
    NULL,				/* create_font */
    NULL,				/* free_font */
    close_display,			/* close_display */
    NULL,				/* wire_to_event */
    NULL,				/* event_to_wire */
    NULL,				/* error */
    NULL,				/* error_string */
};

static XEXT_GENERATE_FIND_DISPLAY (find_display, xf86vidmode_info, 
				   xf86vidmode_extension_name, 
				   &xf86vidmode_extension_hooks, 
				   0, NULL)

static XEXT_GENERATE_CLOSE_DISPLAY (close_display, xf86vidmode_info)


/*****************************************************************************
 *                                                                           *
 *		    public XFree86-VidMode Extension routines                *
 *                                                                           *
 *****************************************************************************/

Bool
SDL_NAME(XF86VidModeQueryExtension) (dpy, event_basep, error_basep)
    Display *dpy;
    int *event_basep, *error_basep;
{
    XExtDisplayInfo *info = find_display (dpy);

    if (XextHasExtension(info)) {
	*event_basep = info->codes->first_event;
	*error_basep = info->codes->first_error;
	return True;
    } else {
	return False;
    }
}

Bool
SDL_NAME(XF86VidModeQueryVersion)(dpy, majorVersion, minorVersion)
    Display* dpy;
    int* majorVersion; 
    int* minorVersion;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeQueryVersionReply rep;
    xXF86VidModeQueryVersionReq *req;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeQueryVersion, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeQueryVersion;
    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
	UnlockDisplay(dpy);
	SyncHandle();
	return False;
    }
    *majorVersion = rep.majorVersion;
    *minorVersion = rep.minorVersion;
    UnlockDisplay(dpy);
    SyncHandle();
    if (*majorVersion >= 2)
	SDL_NAME(XF86VidModeSetClientVersion)(dpy);
    return True;
}

Bool
SDL_NAME(XF86VidModeSetClientVersion)(Display *dpy)
{
    XExtDisplayInfo *info = find_display(dpy);
    xXF86VidModeSetClientVersionReq *req;

    XF86VidModeCheckExtension(dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeSetClientVersion, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeSetClientVersion;
    req->major = XF86VIDMODE_MAJOR_VERSION;
    req->minor = XF86VIDMODE_MINOR_VERSION;
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeSetGamma)(Display *dpy, int screen, SDL_NAME(XF86VidModeGamma) *Gamma)
{
    XExtDisplayInfo *info = find_display(dpy);
    xXF86VidModeSetGammaReq *req;

    XF86VidModeCheckExtension(dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeSetGamma, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeSetGamma;
    req->screen = screen;
    req->red = (CARD32)(Gamma->red * 10000.);
    req->green = (CARD32)(Gamma->green * 10000.);
    req->blue = (CARD32)(Gamma->blue * 10000.);
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeGetGamma)(Display *dpy, int screen, SDL_NAME(XF86VidModeGamma) *Gamma)
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetGammaReply rep;
    xXF86VidModeGetGammaReq *req;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeGetGamma, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetGamma;
    req->screen = screen;
    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
	UnlockDisplay(dpy);
	SyncHandle();
	return False;
    }
    Gamma->red = ((float)rep.red) / 10000.;
    Gamma->green = ((float)rep.green) / 10000.;
    Gamma->blue = ((float)rep.blue) / 10000.;
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeGetModeLine)(dpy, screen, dotclock, modeline)
    Display* dpy;
    int screen;
    int* dotclock; 
    SDL_NAME(XF86VidModeModeLine)* modeline;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetModeLineReply rep;
    xXF86OldVidModeGetModeLineReply oldrep;
    xXF86VidModeGetModeLineReq *req;
    int majorVersion, minorVersion;

    XF86VidModeCheckExtension (dpy, info, False);
    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);

    LockDisplay(dpy);
    GetReq(XF86VidModeGetModeLine, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetModeLine;
    req->screen = screen;
    
    if (majorVersion < 2) {
	if (!_XReply(dpy, (xReply *)&oldrep, 
            (SIZEOF(xXF86OldVidModeGetModeLineReply) - SIZEOF(xReply)) >> 2, xFalse)) {
	    UnlockDisplay(dpy);
	    SyncHandle();
	    return False;
	}
	*dotclock = oldrep.dotclock;
	modeline->hdisplay   = oldrep.hdisplay;
	modeline->hsyncstart = oldrep.hsyncstart;
	modeline->hsyncend   = oldrep.hsyncend;
	modeline->htotal     = oldrep.htotal;
	modeline->hskew      = 0;
	modeline->vdisplay   = oldrep.vdisplay;
	modeline->vsyncstart = oldrep.vsyncstart;
	modeline->vsyncend   = oldrep.vsyncend;
	modeline->vtotal     = oldrep.vtotal;
	modeline->flags      = oldrep.flags;
	modeline->privsize   = oldrep.privsize;
    } else {
	if (!_XReply(dpy, (xReply *)&rep, 
            (SIZEOF(xXF86VidModeGetModeLineReply) - SIZEOF(xReply)) >> 2, xFalse)) {
	    UnlockDisplay(dpy);
	    SyncHandle();
	    return False;
	}
	*dotclock = rep.dotclock;
	modeline->hdisplay   = rep.hdisplay;
	modeline->hsyncstart = rep.hsyncstart;
	modeline->hsyncend   = rep.hsyncend;
	modeline->htotal     = rep.htotal;
	modeline->hskew      = rep.hskew;
	modeline->vdisplay   = rep.vdisplay;
	modeline->vsyncstart = rep.vsyncstart;
	modeline->vsyncend   = rep.vsyncend;
	modeline->vtotal     = rep.vtotal;
	modeline->flags      = rep.flags;
	modeline->privsize   = rep.privsize;
    }
    
    if (modeline->privsize > 0) {
	if (!(modeline->private = Xcalloc(modeline->privsize, sizeof(INT32)))) {
	    _XEatData(dpy, (modeline->privsize) * sizeof(INT32));
	    Xfree(modeline->private);
	    return False;
	}
	_XRead(dpy, (char*)modeline->private, modeline->privsize * sizeof(INT32));
    } else {
	modeline->private = NULL;
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeGetAllModeLines)(dpy, screen, modecount, modelinesPtr)
    Display* dpy;
    int screen;
    int* modecount; 
    SDL_NAME(XF86VidModeModeInfo) ***modelinesPtr;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetAllModeLinesReply rep;
    xXF86VidModeGetAllModeLinesReq *req;
    SDL_NAME(XF86VidModeModeInfo) *mdinfptr, **modelines;
    xXF86VidModeModeInfo xmdline;
    xXF86OldVidModeModeInfo oldxmdline;
    int i;
    int majorVersion, minorVersion;
    Bool protocolBug = False;

    XF86VidModeCheckExtension (dpy, info, False);

    /*
     * Note: There was a bug in the protocol implementation in versions
     * 0.x with x < 8 (the .private field wasn't being passed over the wire).
     * Check the server's version, and accept the old format if appropriate.
     */

    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);
    if (majorVersion == 0 && minorVersion < 8) {
	protocolBug = True;
#ifdef DEBUG
	fprintf(stderr, "XF86VidModeGetAllModeLines: Warning: Xserver is"
		"running an old version (%d.%d)\n", majorVersion,
		minorVersion);
#endif
    }
    
    LockDisplay(dpy);
    GetReq(XF86VidModeGetAllModeLines, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetAllModeLines;
    req->screen = screen;
    if (!_XReply(dpy, (xReply *)&rep, 
        (SIZEOF(xXF86VidModeGetAllModeLinesReply) - SIZEOF(xReply)) >> 2, xFalse)) {
        UnlockDisplay(dpy);
	SyncHandle();
	return False;
    }

    *modecount = rep.modecount;

    if (!(modelines = (SDL_NAME(XF86VidModeModeInfo) **) Xcalloc(rep.modecount,
                                          sizeof(SDL_NAME(XF86VidModeModeInfo) *)
                                          +sizeof(SDL_NAME(XF86VidModeModeInfo))))) {
	if (majorVersion < 2)
            _XEatData(dpy, (rep.modecount) * sizeof(xXF86OldVidModeModeInfo));
	else
            _XEatData(dpy, (rep.modecount) * sizeof(xXF86VidModeModeInfo));
        Xfree(modelines);
        UnlockDisplay(dpy);
        SyncHandle();
        return False;
    }
    mdinfptr = (SDL_NAME(XF86VidModeModeInfo) *) (
			    (char *) modelines
			    + rep.modecount*sizeof(SDL_NAME(XF86VidModeModeInfo) *)
		    );

    for (i = 0; i < rep.modecount; i++) {
        modelines[i] = mdinfptr++;
	if (majorVersion < 2) {
            _XRead(dpy, (char*)&oldxmdline, sizeof(xXF86OldVidModeModeInfo));
	    modelines[i]->dotclock   = oldxmdline.dotclock;
	    modelines[i]->hdisplay   = oldxmdline.hdisplay;
	    modelines[i]->hsyncstart = oldxmdline.hsyncstart;
	    modelines[i]->hsyncend   = oldxmdline.hsyncend;
	    modelines[i]->htotal     = oldxmdline.htotal;
	    modelines[i]->hskew      = 0;
	    modelines[i]->vdisplay   = oldxmdline.vdisplay;
	    modelines[i]->vsyncstart = oldxmdline.vsyncstart;
	    modelines[i]->vsyncend   = oldxmdline.vsyncend;
	    modelines[i]->vtotal     = oldxmdline.vtotal;
	    modelines[i]->flags      = oldxmdline.flags;
	    if (protocolBug) {
		modelines[i]->privsize = 0;
		modelines[i]->private = NULL;
	    } else {
		modelines[i]->privsize   = oldxmdline.privsize;
		if (oldxmdline.privsize > 0) {
	            if (!(modelines[i]->private =
			    Xcalloc(oldxmdline.privsize, sizeof(INT32)))) {
			_XEatData(dpy, (oldxmdline.privsize) * sizeof(INT32));
			Xfree(modelines[i]->private);
		    } else {
			_XRead(dpy, (char*)modelines[i]->private,
			     oldxmdline.privsize * sizeof(INT32));
		    }
		} else {
		  modelines[i]->private = NULL;
		}
	    }
	} else {
            _XRead(dpy, (char*)&xmdline, sizeof(xXF86VidModeModeInfo));
	    modelines[i]->dotclock   = xmdline.dotclock;
	    modelines[i]->hdisplay   = xmdline.hdisplay;
	    modelines[i]->hsyncstart = xmdline.hsyncstart;
	    modelines[i]->hsyncend   = xmdline.hsyncend;
	    modelines[i]->htotal     = xmdline.htotal;
	    modelines[i]->hskew      = xmdline.hskew;
	    modelines[i]->vdisplay   = xmdline.vdisplay;
	    modelines[i]->vsyncstart = xmdline.vsyncstart;
	    modelines[i]->vsyncend   = xmdline.vsyncend;
	    modelines[i]->vtotal     = xmdline.vtotal;
	    modelines[i]->flags      = xmdline.flags;
	    if (protocolBug) {
		modelines[i]->privsize = 0;
		modelines[i]->private = NULL;
	    } else {
		modelines[i]->privsize   = xmdline.privsize;
		if (xmdline.privsize > 0) {
		    if (!(modelines[i]->private =
			    Xcalloc(xmdline.privsize, sizeof(INT32)))) {
			_XEatData(dpy, (xmdline.privsize) * sizeof(INT32));
			Xfree(modelines[i]->private);
		    } else {
			_XRead(dpy, (char*)modelines[i]->private,
			     xmdline.privsize * sizeof(INT32));
		    }
		} else {
		    modelines[i]->private = NULL;
		}
	    }
	}
    }
    *modelinesPtr = modelines;
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

/*
 * GetReq replacement for use with VidMode protocols earlier than 2.0
 */
#if !defined(UNIXCPP) || defined(ANSICPP)
#define GetOldReq(name, oldname, req) \
        WORD64ALIGN\
	if ((dpy->bufptr + SIZEOF(x##oldname##Req)) > dpy->bufmax)\
		_XFlush(dpy);\
	req = (x##oldname##Req *)(dpy->last_req = dpy->bufptr);\
	req->reqType = X_##name;\
	req->length = (SIZEOF(x##oldname##Req))>>2;\
	dpy->bufptr += SIZEOF(x##oldname##Req);\
	dpy->request++

#else  /* non-ANSI C uses empty comment instead of "##" for token concatenation */
#define GetOldReq(name, oldname, req) \
        WORD64ALIGN\
	if ((dpy->bufptr + SIZEOF(x/**/oldname/**/Req)) > dpy->bufmax)\
		_XFlush(dpy);\
	req = (x/**/oldname/**/Req *)(dpy->last_req = dpy->bufptr);\
	req->reqType = X_/**/name;\
	req->length = (SIZEOF(x/**/oldname/**/Req))>>2;\
	dpy->bufptr += SIZEOF(x/**/oldname/**/Req);\
	dpy->request++
#endif

Bool
SDL_NAME(XF86VidModeAddModeLine) (dpy, screen, newmodeline, aftermodeline)
    Display *dpy;
    int screen;
    SDL_NAME(XF86VidModeModeInfo)* newmodeline;
    SDL_NAME(XF86VidModeModeInfo)* aftermodeline;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeAddModeLineReq *req;
    xXF86OldVidModeAddModeLineReq *oldreq;
    int majorVersion, minorVersion;

    XF86VidModeCheckExtension (dpy, info, False);
    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);

    LockDisplay(dpy);
    if (majorVersion < 2) {
	GetOldReq(XF86VidModeAddModeLine, XF86OldVidModeAddModeLine, oldreq);
	oldreq->reqType = info->codes->major_opcode;
	oldreq->xf86vidmodeReqType = X_XF86VidModeAddModeLine;
	oldreq->screen = screen;
	oldreq->dotclock =	newmodeline->dotclock;
	oldreq->hdisplay =	newmodeline->hdisplay;
	oldreq->hsyncstart =	newmodeline->hsyncstart;
	oldreq->hsyncend =	newmodeline->hsyncend;
	oldreq->htotal =	newmodeline->htotal;
	oldreq->vdisplay =	newmodeline->vdisplay;
	oldreq->vsyncstart =	newmodeline->vsyncstart;
	oldreq->vsyncend =	newmodeline->vsyncend;
	oldreq->vtotal =	newmodeline->vtotal;
	oldreq->flags =		newmodeline->flags;
	oldreq->privsize =	newmodeline->privsize;
	if (aftermodeline != NULL) {
	    oldreq->after_dotclock =	aftermodeline->dotclock;
	    oldreq->after_hdisplay =	aftermodeline->hdisplay;
	    oldreq->after_hsyncstart =	aftermodeline->hsyncstart;
	    oldreq->after_hsyncend =	aftermodeline->hsyncend;
	    oldreq->after_htotal =	aftermodeline->htotal;
	    oldreq->after_vdisplay =	aftermodeline->vdisplay;
	    oldreq->after_vsyncstart =	aftermodeline->vsyncstart;
	    oldreq->after_vsyncend =	aftermodeline->vsyncend;
	    oldreq->after_vtotal =	aftermodeline->vtotal;
	    oldreq->after_flags =	aftermodeline->flags;
	} else {
	    oldreq->after_dotclock =	0;
	    oldreq->after_hdisplay =	0;
	    oldreq->after_hsyncstart =	0;
	    oldreq->after_hsyncend =	0;
	    oldreq->after_htotal =	0;
	    oldreq->after_vdisplay =	0;
	    oldreq->after_vsyncstart =	0;
	    oldreq->after_vsyncend =	0;
	    oldreq->after_vtotal =	0;
	    oldreq->after_flags =	0;
	}
	if (newmodeline->privsize) {
	    oldreq->length += newmodeline->privsize;
	    Data32(dpy, (long *) newmodeline->private,
	       newmodeline->privsize * sizeof(INT32));
	}
    } else {
	GetReq(XF86VidModeAddModeLine, req);
	req->reqType = info->codes->major_opcode;
	req->xf86vidmodeReqType = X_XF86VidModeAddModeLine;
	req->screen = screen;
	req->dotclock =		newmodeline->dotclock;
	req->hdisplay =		newmodeline->hdisplay;
	req->hsyncstart =	newmodeline->hsyncstart;
	req->hsyncend =		newmodeline->hsyncend;
	req->htotal =		newmodeline->htotal;
	req->hskew =		newmodeline->hskew;
	req->vdisplay =		newmodeline->vdisplay;
	req->vsyncstart =	newmodeline->vsyncstart;
	req->vsyncend =		newmodeline->vsyncend;
	req->vtotal =		newmodeline->vtotal;
	req->flags =		newmodeline->flags;
	req->privsize =		newmodeline->privsize;
	if (aftermodeline != NULL) {
	    req->after_dotclock =	aftermodeline->dotclock;
	    req->after_hdisplay =	aftermodeline->hdisplay;
	    req->after_hsyncstart =	aftermodeline->hsyncstart;
	    req->after_hsyncend =	aftermodeline->hsyncend;
	    req->after_htotal =		aftermodeline->htotal;
	    req->after_hskew =		aftermodeline->hskew;
	    req->after_vdisplay =	aftermodeline->vdisplay;
	    req->after_vsyncstart =	aftermodeline->vsyncstart;
	    req->after_vsyncend =	aftermodeline->vsyncend;
	    req->after_vtotal =		aftermodeline->vtotal;
	    req->after_flags =		aftermodeline->flags;
	} else {
	    req->after_dotclock =	0;
	    req->after_hdisplay =	0;
	    req->after_hsyncstart =	0;
	    req->after_hsyncend =	0;
	    req->after_htotal =		0;
	    req->after_hskew =		0;
	    req->after_vdisplay =	0;
	    req->after_vsyncstart =	0;
	    req->after_vsyncend =	0;
	    req->after_vtotal =		0;
	    req->after_flags =		0;
	}
	if (newmodeline->privsize) {
	    req->length += newmodeline->privsize;
	    Data32(dpy, (long *) newmodeline->private,
	       newmodeline->privsize * sizeof(INT32));
	}
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeDeleteModeLine) (dpy, screen, modeline)
    Display *dpy;
    int screen;
    SDL_NAME(XF86VidModeModeInfo)* modeline;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeDeleteModeLineReq *req;
    xXF86OldVidModeDeleteModeLineReq *oldreq;
    int majorVersion, minorVersion;

    XF86VidModeCheckExtension (dpy, info, 0);
    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);

    LockDisplay(dpy);
    if (majorVersion < 2) {
	GetOldReq(XF86VidModeDeleteModeLine, XF86OldVidModeDeleteModeLine, oldreq);
	oldreq->reqType = info->codes->major_opcode;
	oldreq->xf86vidmodeReqType = X_XF86VidModeDeleteModeLine;
	oldreq->screen = screen;
	oldreq->dotclock =	modeline->dotclock;
	oldreq->hdisplay =	modeline->hdisplay;
	oldreq->hsyncstart =	modeline->hsyncstart;
	oldreq->hsyncend =	modeline->hsyncend;
	oldreq->htotal =	modeline->htotal;
	oldreq->vdisplay =	modeline->vdisplay;
	oldreq->vsyncstart =	modeline->vsyncstart;
	oldreq->vsyncend =	modeline->vsyncend;
	oldreq->vtotal =	modeline->vtotal;
	oldreq->flags =		modeline->flags;
	oldreq->privsize =	modeline->privsize;
	if (modeline->privsize) {
	    oldreq->length += modeline->privsize;
	    Data32(dpy, (long *) modeline->private,
	       modeline->privsize * sizeof(INT32));
	}
    } else {
	GetReq(XF86VidModeDeleteModeLine, req);
	req->reqType = info->codes->major_opcode;
	req->xf86vidmodeReqType = X_XF86VidModeDeleteModeLine;
	req->screen = screen;
	req->dotclock =		modeline->dotclock;
	req->hdisplay =		modeline->hdisplay;
	req->hsyncstart =	modeline->hsyncstart;
	req->hsyncend =		modeline->hsyncend;
	req->htotal =		modeline->htotal;
	req->hskew =		modeline->hskew;
	req->vdisplay =		modeline->vdisplay;
	req->vsyncstart =	modeline->vsyncstart;
	req->vsyncend =		modeline->vsyncend;
	req->vtotal =		modeline->vtotal;
	req->flags =		modeline->flags;
	req->privsize =		modeline->privsize;
	if (modeline->privsize) {
	    req->length += modeline->privsize;
	    Data32(dpy, (long *) modeline->private,
	       modeline->privsize * sizeof(INT32));
	}
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeModModeLine) (dpy, screen, modeline)
    Display *dpy;
    int screen;
    SDL_NAME(XF86VidModeModeLine)* modeline;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeModModeLineReq *req;
    xXF86OldVidModeModModeLineReq *oldreq;
    int majorVersion, minorVersion;

    XF86VidModeCheckExtension (dpy, info, 0);
    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);

    LockDisplay(dpy);
    if (majorVersion < 2) {
	GetOldReq(XF86VidModeModModeLine, XF86OldVidModeModModeLine, oldreq);
	oldreq->reqType = info->codes->major_opcode;
	oldreq->xf86vidmodeReqType = X_XF86VidModeModModeLine;
	oldreq->screen = screen;
	oldreq->hdisplay =	modeline->hdisplay;
	oldreq->hsyncstart =	modeline->hsyncstart;
	oldreq->hsyncend =	modeline->hsyncend;
	oldreq->htotal =	modeline->htotal;
	oldreq->vdisplay =	modeline->vdisplay;
	oldreq->vsyncstart =	modeline->vsyncstart;
	oldreq->vsyncend =	modeline->vsyncend;
	oldreq->vtotal =	modeline->vtotal;
	oldreq->flags =		modeline->flags;
	oldreq->privsize =	modeline->privsize;
	if (modeline->privsize) {
	    oldreq->length += modeline->privsize;
	    Data32(dpy, (long *) modeline->private,
	       modeline->privsize * sizeof(INT32));
	}
    } else {
	GetReq(XF86VidModeModModeLine, req);
	req->reqType = info->codes->major_opcode;
	req->xf86vidmodeReqType = X_XF86VidModeModModeLine;
	req->screen = screen;
	req->hdisplay =		modeline->hdisplay;
	req->hsyncstart =	modeline->hsyncstart;
	req->hsyncend =		modeline->hsyncend;
	req->htotal =		modeline->htotal;
	req->hskew =		modeline->hskew;
	req->vdisplay =		modeline->vdisplay;
	req->vsyncstart =	modeline->vsyncstart;
	req->vsyncend =		modeline->vsyncend;
	req->vtotal =		modeline->vtotal;
	req->flags =		modeline->flags;
	req->privsize =		modeline->privsize;
	if (modeline->privsize) {
	    req->length += modeline->privsize;
	    Data32(dpy, (long *) modeline->private,
	       modeline->privsize * sizeof(INT32));
	}
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Status
SDL_NAME(XF86VidModeValidateModeLine) (dpy, screen, modeline)
    Display *dpy;
    int screen;
    SDL_NAME(XF86VidModeModeInfo)* modeline;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeValidateModeLineReq *req;
    xXF86OldVidModeValidateModeLineReq *oldreq;
    xXF86VidModeValidateModeLineReply rep;
    int majorVersion, minorVersion;

    XF86VidModeCheckExtension (dpy, info, 0);
    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);

    LockDisplay(dpy);

    if (majorVersion < 2) {
	GetOldReq(XF86VidModeValidateModeLine, XF86OldVidModeValidateModeLine, oldreq);
	oldreq->reqType = info->codes->major_opcode;
	oldreq->xf86vidmodeReqType = X_XF86VidModeValidateModeLine;
	oldreq->screen = screen;
	oldreq->dotclock =	modeline->dotclock;
	oldreq->hdisplay =	modeline->hdisplay;
	oldreq->hsyncstart =	modeline->hsyncstart;
	oldreq->hsyncend =	modeline->hsyncend;
	oldreq->htotal =	modeline->htotal;
	oldreq->vdisplay =	modeline->vdisplay;
	oldreq->vsyncstart =	modeline->vsyncstart;
	oldreq->vsyncend =	modeline->vsyncend;
	oldreq->vtotal =	modeline->vtotal;
	oldreq->flags =		modeline->flags;
	oldreq->privsize =	modeline->privsize;
	if (modeline->privsize) {
	    oldreq->length += modeline->privsize;
	    Data32(dpy, (long *) modeline->private,
	       modeline->privsize * sizeof(INT32));
	}
    } else {
	GetReq(XF86VidModeValidateModeLine, req);
	req->reqType = info->codes->major_opcode;
	req->xf86vidmodeReqType = X_XF86VidModeValidateModeLine;
	req->screen = screen;
	req->dotclock =		modeline->dotclock;
	req->hdisplay =		modeline->hdisplay;
	req->hsyncstart =	modeline->hsyncstart;
	req->hsyncend =		modeline->hsyncend;
	req->htotal =		modeline->htotal;
	req->hskew =		modeline->hskew;
	req->vdisplay =		modeline->vdisplay;
	req->vsyncstart =	modeline->vsyncstart;
	req->vsyncend =		modeline->vsyncend;
	req->vtotal =		modeline->vtotal;
	req->flags =		modeline->flags;
	req->privsize =		modeline->privsize;
	if (modeline->privsize) {
	    req->length += modeline->privsize;
	    Data32(dpy, (long *) modeline->private,
	       modeline->privsize * sizeof(INT32));
	}
    }
    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
	UnlockDisplay(dpy);
	SyncHandle();
	return MODE_BAD;
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return rep.status;
}

Bool
SDL_NAME(XF86VidModeSwitchMode)(dpy, screen, zoom)
    Display* dpy;
    int screen;
    int zoom;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeSwitchModeReq *req;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeSwitchMode, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeSwitchMode;
    req->screen = screen;
    req->zoom = zoom;
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}
    
Bool
SDL_NAME(XF86VidModeSwitchToMode)(dpy, screen, modeline)
    Display* dpy;
    int screen;
    SDL_NAME(XF86VidModeModeInfo)* modeline;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeSwitchToModeReq *req;
    xXF86OldVidModeSwitchToModeReq *oldreq;
    int majorVersion, minorVersion;
    Bool protocolBug = False;

    XF86VidModeCheckExtension (dpy, info, False);

    /*
     * Note: There was a bug in the protocol implementation in versions
     * 0.x with x < 8 (the .private field wasn't expected to be sent over
     * the wire).  Check the server's version, and accept the old format
     * if appropriate.
     */

    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);
    if (majorVersion == 0 && minorVersion < 8) {
	protocolBug = True;
#ifdef DEBUG
	fprintf(stderr, "XF86VidModeSwitchToMode: Warning: Xserver is"
		"running an old version (%d.%d)\n", majorVersion,
		minorVersion);
#endif
    }
    
    LockDisplay(dpy);
    if (majorVersion < 2) {
	GetOldReq(XF86VidModeSwitchToMode, XF86OldVidModeSwitchToMode, oldreq);
	oldreq->reqType = info->codes->major_opcode;
	oldreq->xf86vidmodeReqType = X_XF86VidModeSwitchToMode;
	oldreq->screen = screen;
	oldreq->dotclock =	modeline->dotclock;
	oldreq->hdisplay =	modeline->hdisplay;
	oldreq->hsyncstart =	modeline->hsyncstart;
	oldreq->hsyncend =	modeline->hsyncend;
	oldreq->htotal =	modeline->htotal;
	oldreq->vdisplay =	modeline->vdisplay;
	oldreq->vsyncstart =	modeline->vsyncstart;
	oldreq->vsyncend =	modeline->vsyncend;
	oldreq->vtotal =	modeline->vtotal;
	oldreq->flags =	modeline->flags;
	if (protocolBug) {
	    oldreq->privsize = 0;
	} else {
	    oldreq->privsize =	modeline->privsize;
	    if (modeline->privsize) {
		oldreq->length += modeline->privsize;
		Data32(dpy, (long *) modeline->private,
	           modeline->privsize * sizeof(INT32));
	    }
	}
    } else {
	GetReq(XF86VidModeSwitchToMode, req);
	req->reqType = info->codes->major_opcode;
	req->xf86vidmodeReqType = X_XF86VidModeSwitchToMode;
	req->screen = screen;
	req->dotclock =	modeline->dotclock;
	req->hdisplay =	modeline->hdisplay;
	req->hsyncstart =	modeline->hsyncstart;
	req->hsyncend =	modeline->hsyncend;
	req->htotal =	modeline->htotal;
	req->hskew =	modeline->hskew;
	req->vdisplay =	modeline->vdisplay;
	req->vsyncstart =	modeline->vsyncstart;
	req->vsyncend =	modeline->vsyncend;
	req->vtotal =	modeline->vtotal;
	req->flags =	modeline->flags;
	if (protocolBug) {
	    req->privsize = 0;
	} else {
	    req->privsize =	modeline->privsize;
	    if (modeline->privsize) {
		req->length += modeline->privsize;
		Data32(dpy, (long *) modeline->private,
	           modeline->privsize * sizeof(INT32));
	    }
	}
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}
    
Bool
SDL_NAME(XF86VidModeLockModeSwitch)(dpy, screen, lock)
    Display* dpy;
    int screen;
    int lock;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeLockModeSwitchReq *req;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeLockModeSwitch, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeLockModeSwitch;
    req->screen = screen;
    req->lock = lock;
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}
    
Bool
SDL_NAME(XF86VidModeGetMonitor)(dpy, screen, monitor)
    Display* dpy;
    int screen;
    SDL_NAME(XF86VidModeMonitor)* monitor;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetMonitorReply rep;
    xXF86VidModeGetMonitorReq *req;
    CARD32 syncrange;
    int i;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeGetMonitor, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetMonitor;
    req->screen = screen;
    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
	UnlockDisplay(dpy);
	SyncHandle();
	return False;
    }
    monitor->nhsync = rep.nhsync;
    monitor->nvsync = rep.nvsync;
#if 0
    monitor->bandwidth = (float)rep.bandwidth / 1e6;
#endif
    if (rep.vendorLength) {
	if (!(monitor->vendor = (char *)Xcalloc(rep.vendorLength + 1, 1))) {
	    _XEatData(dpy, (rep.nhsync + rep.nvsync) * 4 +
		      ((rep.vendorLength+3) & ~3) + ((rep.modelLength+3) & ~3));
            UnlockDisplay(dpy);
            SyncHandle();
	    return False;
	}
    } else {
	monitor->vendor = NULL;
    }
    if (rep.modelLength) {
	if (!(monitor->model = Xcalloc(rep.modelLength + 1, 1))) {
	    _XEatData(dpy, (rep.nhsync + rep.nvsync) * 4 +
		      ((rep.vendorLength+3) & ~3) + ((rep.modelLength+3) & ~3));
	    if (monitor->vendor)
		Xfree(monitor->vendor);
            UnlockDisplay(dpy);
            SyncHandle();
	    return False;
	}
    } else {
	monitor->model = NULL;
    }
    if (!(monitor->hsync = Xcalloc(rep.nhsync, sizeof(SDL_NAME(XF86VidModeSyncRange))))) {
	_XEatData(dpy, (rep.nhsync + rep.nvsync) * 4 +
		  ((rep.vendorLength+3) & ~3) + ((rep.modelLength+3) & ~3));
	
	if (monitor->vendor)
	    Xfree(monitor->vendor);
	if (monitor->model)
	    Xfree(monitor->model);
        UnlockDisplay(dpy);
        SyncHandle();
	return False;
    }
    if (!(monitor->vsync = Xcalloc(rep.nvsync, sizeof(SDL_NAME(XF86VidModeSyncRange))))) {
	_XEatData(dpy, (rep.nhsync + rep.nvsync) * 4 +
		  ((rep.vendorLength+3) & ~3) + ((rep.modelLength+3) & ~3));
	if (monitor->vendor)
	    Xfree(monitor->vendor);
	if (monitor->model)
	    Xfree(monitor->model);
	Xfree(monitor->hsync);
        UnlockDisplay(dpy);
        SyncHandle();
	return False;
    }
    for (i = 0; i < rep.nhsync; i++) {
	_XRead(dpy, (char *)&syncrange, 4);
	monitor->hsync[i].lo = (float)(syncrange & 0xFFFF) / 100.0;
	monitor->hsync[i].hi = (float)(syncrange >> 16) / 100.0;
    }
    for (i = 0; i < rep.nvsync; i++) {
	_XRead(dpy, (char *)&syncrange, 4);
	monitor->vsync[i].lo = (float)(syncrange & 0xFFFF) / 100.0;
	monitor->vsync[i].hi = (float)(syncrange >> 16) / 100.0;
    }
    if (rep.vendorLength)
	_XReadPad(dpy, monitor->vendor, rep.vendorLength);
    else
	monitor->vendor = "";
    if (rep.modelLength)
	_XReadPad(dpy, monitor->model, rep.modelLength);
    else
	monitor->model = "";
	
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeGetViewPort)(dpy, screen, x, y)
    Display* dpy;
    int screen;
    int *x, *y;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetViewPortReply rep;
    xXF86VidModeGetViewPortReq *req;
    int majorVersion, minorVersion;
    Bool protocolBug = False;

    XF86VidModeCheckExtension (dpy, info, False);

    /*
     * Note: There was a bug in the protocol implementation in versions
     * 0.x with x < 8 (no reply was sent, so the client would hang)
     * Check the server's version, and don't wait for a reply with older
     * versions.
     */

    SDL_NAME(XF86VidModeQueryVersion)(dpy, &majorVersion, &minorVersion);
    if (majorVersion == 0 && minorVersion < 8) {
	protocolBug = True;
#ifdef DEBUG
	fprintf(stderr, "XF86VidModeGetViewPort: Warning: Xserver is"
		"running an old version (%d.%d)\n", majorVersion,
		minorVersion);
#endif
    }
    LockDisplay(dpy);
    GetReq(XF86VidModeGetViewPort, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetViewPort;
    req->screen = screen;
    if (protocolBug) {
	*x = 0;
	*y = 0;
    } else {
	if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
	    UnlockDisplay(dpy);
	    SyncHandle();
	    return False;
	}
	*x = rep.x;
	*y = rep.y;
    }

    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeSetViewPort)(dpy, screen, x, y)
    Display* dpy;
    int screen;
    int x, y;
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeSetViewPortReq *req;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeSetViewPort, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeSetViewPort;
    req->screen = screen;
    req->x = x;
    req->y = y;

    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeGetDotClocks)(dpy, screen,
	    flagsPtr, numclocksPtr, maxclocksPtr, clocksPtr)
    Display* dpy;
    int screen;
    int *flagsPtr, *numclocksPtr, *maxclocksPtr, *clocksPtr[]; 
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetDotClocksReply rep;
    xXF86VidModeGetDotClocksReq *req;
    int i, *dotclocks;
    CARD32 dotclk;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeGetDotClocks, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetDotClocks;
    req->screen = screen;
    if (!_XReply(dpy, (xReply *)&rep, 
        (SIZEOF(xXF86VidModeGetDotClocksReply) - SIZEOF(xReply)) >> 2, xFalse))
    {
        UnlockDisplay(dpy);
        SyncHandle();
        return False;
    }
    *numclocksPtr = rep.clocks;
    *maxclocksPtr = rep.maxclocks;
    *flagsPtr     = rep.flags;

    if (!(dotclocks = (int*) Xcalloc(rep.clocks, sizeof(int)))) {
        _XEatData(dpy, (rep.clocks) * 4);
        Xfree(dotclocks);
        UnlockDisplay(dpy);
        SyncHandle();
        return False;
    }

    for (i = 0; i < rep.clocks; i++) {
        _XRead(dpy, (char*)&dotclk, 4);
	dotclocks[i] = dotclk;
    }
    *clocksPtr = dotclocks;
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
SDL_NAME(XF86VidModeSetGammaRamp) (
    Display *dpy,
    int screen,
    int size,
    unsigned short *red,
    unsigned short *green,
    unsigned short *blue
)
{
    int length = (size + 1) & ~1;
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeSetGammaRampReq *req;

    XF86VidModeCheckExtension (dpy, info, False);
    LockDisplay(dpy);
    GetReq(XF86VidModeSetGammaRamp, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeSetGammaRamp;
    req->screen = screen;
    req->length += (length >> 1) * 3;
    req->size = size;
    _XSend(dpy, (char*)red, size * 2);
    _XSend(dpy, (char*)green, size * 2);
    _XSend(dpy, (char*)blue, size * 2);
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}


Bool
SDL_NAME(XF86VidModeGetGammaRamp) (
    Display *dpy,
    int screen,
    int size,
    unsigned short *red,
    unsigned short *green,
    unsigned short *blue
)
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetGammaRampReq *req;
    xXF86VidModeGetGammaRampReply rep;
  
    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeGetGammaRamp, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetGammaRamp;
    req->screen = screen;
    req->size = size;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return False;
    }
    if(rep.size) {
	_XRead(dpy, (char*)red, rep.size << 1);
	_XRead(dpy, (char*)green, rep.size << 1);
	_XRead(dpy, (char*)blue, rep.size << 1);
    }

    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool SDL_NAME(XF86VidModeGetGammaRampSize)(
    Display *dpy,
    int screen,
    int *size
)
{
    XExtDisplayInfo *info = find_display (dpy);
    xXF86VidModeGetGammaRampSizeReq *req;
    xXF86VidModeGetGammaRampSizeReply rep;
  
    *size = 0;

    XF86VidModeCheckExtension (dpy, info, False);

    LockDisplay(dpy);
    GetReq(XF86VidModeGetGammaRampSize, req);
    req->reqType = info->codes->major_opcode;
    req->xf86vidmodeReqType = X_XF86VidModeGetGammaRampSize;
    req->screen = screen;
    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return False; 
    }
    *size = rep.size;
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}