xf86vmode.c

远程桌面连接工具

/* $XFree86: xc/programs/Xserver/Xext/xf86vmode.c,v 3.30.2.3 1997/06/11 12:08:44 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/24 1996/10/26 21:56:29 kaleb $ */
/* THIS IS NOT AN X CONSORTIUM STANDARD */

#define NEED_REPLIES
#define NEED_EVENTS
#include "X.h"
#include "Xproto.h"
#include "misc.h"
#include "dixstruct.h"
#include "extnsionst.h"
#include "scrnintstr.h"
#include "servermd.h"
#define _XF86VIDMODE_SERVER_
#include "xf86vmstr.h"
#include "Xfuncproto.h"
#include "../hw/xfree86/common/xf86.h"
#include "../hw/xfree86/common/xf86Priv.h"

#include <X11/Xtrans.h>
#include "../os/osdep.h"
#include <X11/Xauth.h>
#ifndef ESIX
#ifndef Lynx
#include <sys/socket.h>
#else
#include <socket.h>
#endif
#else
#include <lan/socket.h>
#endif

#include "swaprep.h"

extern int xf86ScreenIndex;
extern Bool xf86VidModeEnabled;
extern Bool xf86VidModeAllowNonLocal;

static int vidmodeErrorBase;

static void XF86VidModeResetProc(
#if NeedFunctionPrototypes
    ExtensionEntry* /* extEntry */
#endif
);

static DISPATCH_PROC(ProcXF86VidModeDispatch);
static DISPATCH_PROC(ProcXF86VidModeGetAllModeLines);
static DISPATCH_PROC(ProcXF86VidModeGetModeLine);
static DISPATCH_PROC(ProcXF86VidModeGetMonitor);
static DISPATCH_PROC(ProcXF86VidModeLockModeSwitch);
static DISPATCH_PROC(ProcXF86VidModeAddModeLine);
static DISPATCH_PROC(ProcXF86VidModeDeleteModeLine);
static DISPATCH_PROC(ProcXF86VidModeModModeLine);
static DISPATCH_PROC(ProcXF86VidModeValidateModeLine);
static DISPATCH_PROC(ProcXF86VidModeQueryVersion);
static DISPATCH_PROC(ProcXF86VidModeSwitchMode);
static DISPATCH_PROC(ProcXF86VidModeSwitchToMode);
static DISPATCH_PROC(ProcXF86VidModeGetViewPort);
static DISPATCH_PROC(ProcXF86VidModeSetViewPort);
static DISPATCH_PROC(SProcXF86VidModeDispatch);
static DISPATCH_PROC(SProcXF86VidModeGetAllModeLines);
static DISPATCH_PROC(SProcXF86VidModeGetModeLine);
static DISPATCH_PROC(SProcXF86VidModeGetMonitor);
static DISPATCH_PROC(SProcXF86VidModeLockModeSwitch);
static DISPATCH_PROC(SProcXF86VidModeAddModeLine);
static DISPATCH_PROC(SProcXF86VidModeDeleteModeLine);
static DISPATCH_PROC(SProcXF86VidModeModModeLine);
static DISPATCH_PROC(SProcXF86VidModeValidateModeLine);
static DISPATCH_PROC(SProcXF86VidModeQueryVersion);
static DISPATCH_PROC(SProcXF86VidModeSwitchMode);
static DISPATCH_PROC(SProcXF86VidModeSwitchToMode);
static DISPATCH_PROC(SProcXF86VidModeGetViewPort);
static DISPATCH_PROC(SProcXF86VidModeSetViewPort);

static unsigned char XF86VidModeReqCode = 0;

/* The XF86VIDMODE_EVENTS code is far from complete */

#ifdef XF86VIDMODE_EVENTS
static int XF86VidModeEventBase = 0;

static void SXF86VidModeNotifyEvent();
#if NeedFunctionPrototypes
    xXF86VidModeNotifyEvent * /* from */,
    xXF86VidModeNotifyEvent * /* to */
#endif
);

extern WindowPtr *WindowTable;

static RESTYPE EventType;	/* resource type for event masks */

typedef struct _XF86VidModeEvent *XF86VidModeEventPtr;

typedef struct _XF86VidModeEvent {
    XF86VidModeEventPtr	next;
    ClientPtr		client;
    ScreenPtr		screen;
    XID			resource;
    CARD32		mask;
} XF86VidModeEventRec;

static int XF86VidModeFreeEvents();

typedef struct _XF86VidModeScreenPrivate {
    XF86VidModeEventPtr	events;
    Bool		hasWindow;
} XF86VidModeScreenPrivateRec, *XF86VidModeScreenPrivatePtr;
   
static int ScreenPrivateIndex;

#define GetScreenPrivate(s) ((ScreenSaverScreenPrivatePtr)(s)->devPrivates[ScreenPrivateIndex].ptr)
#define SetScreenPrivate(s,v) ((s)->devPrivates[ScreenPrivateIndex].ptr = (pointer) v);
#define SetupScreen(s)  ScreenSaverScreenPrivatePtr pPriv = GetScreenPrivate(s)

#define New(t)  ((t *) xalloc (sizeof (t)))
#endif

void
XFree86VidModeExtensionInit()
{
    ExtensionEntry* extEntry;
#ifdef XF86VIDMODE_EVENTS
    int		    i;
    ScreenPtr	    pScreen;

    EventType = CreateNewResourceType(XF86VidModeFreeEvents);
    ScreenPrivateIndex = AllocateScreenPrivateIndex ();
    for (i = 0; i < screenInfo.numScreens; i++)
    {
	pScreen = screenInfo.screens[i];
	SetScreenPrivate (pScreen, NULL);
    }
#endif

    if (
#ifdef XF86VIDMODE_EVENTS
        EventType && ScreenPrivateIndex != -1 &&
#endif
	(extEntry = AddExtension(XF86VIDMODENAME,
				XF86VidModeNumberEvents,
				XF86VidModeNumberErrors,
				ProcXF86VidModeDispatch,
				SProcXF86VidModeDispatch,
				XF86VidModeResetProc,
				StandardMinorOpcode))) {
	XF86VidModeReqCode = (unsigned char)extEntry->base;
	vidmodeErrorBase = extEntry->errorBase;
#ifdef XF86VIDMODE_EVENTS
	XF86VidModeEventBase = extEntry->eventBase;
	EventSwapVector[XF86VidModeEventBase] = SXF86VidModeNotifyEvent;
#endif
    }
}

/*ARGSUSED*/
static void
XF86VidModeResetProc (extEntry)
    ExtensionEntry* extEntry;
{
}

#ifdef XF86VIDMODE_EVENTS
static void
CheckScreenPrivate (pScreen)
    ScreenPtr	pScreen;
{
    SetupScreen (pScreen);

    if (!pPriv)
	return;
    if (!pPriv->events && !pPriv->hasWindow) {
	xfree (pPriv);
	SetScreenPrivate (pScreen, NULL);
    }
}
    
static XF86VidModeScreenPrivatePtr
MakeScreenPrivate (pScreen)
    ScreenPtr	pScreen;
{
    SetupScreen (pScreen);

    if (pPriv)
	return pPriv;
    pPriv = New (XF86VidModeScreenPrivateRec);
    if (!pPriv)
	return 0;
    pPriv->events = 0;
    pPriv->hasWindow = FALSE;
    SetScreenPrivate (pScreen, pPriv);
    return pPriv;
}

static unsigned long
getEventMask (pScreen, client)
    ScreenPtr	pScreen;
    ClientPtr	client;
{
    SetupScreen(pScreen);
    XF86VidModeEventPtr pEv;

    if (!pPriv)
	return 0;
    for (pEv = pPriv->events; pEv; pEv = pEv->next)
	if (pEv->client == client)
	    return pEv->mask;
    return 0;
}

static Bool
setEventMask (pScreen, client, mask)
    ScreenPtr	pScreen;
    ClientPtr	client;
    unsigned long mask;
{
    SetupScreen(pScreen);
    XF86VidModeEventPtr pEv, *pPrev;

    if (getEventMask (pScreen, client) == mask)
	return TRUE;
    if (!pPriv) {
	pPriv = MakeScreenPrivate (pScreen);
	if (!pPriv)
	    return FALSE;
    }
    for (pPrev = &pPriv->events; pEv = *pPrev; pPrev = &pEv->next)
	if (pEv->client == client)
	    break;
    if (mask == 0) {
	*pPrev = pEv->next;
	xfree (pEv);
	CheckScreenPrivate (pScreen);
    } else {
	if (!pEv) {
	    pEv = New (ScreenSaverEventRec);
	    if (!pEv) {
		CheckScreenPrivate (pScreen);
		return FALSE;
	    }
	    *pPrev = pEv;
	    pEv->next = NULL;
	    pEv->client = client;
	    pEv->screen = pScreen;
	    pEv->resource = FakeClientID (client->index);
	}
	pEv->mask = mask;
    }
    return TRUE;
}

static int
XF86VidModeFreeEvents (value, id)
    pointer value;
    XID id;
{
    XF86VidModeEventPtr	pOld = (XF86VidModeEventPtr)value;
    ScreenPtr pScreen = pOld->screen;
    SetupScreen (pScreen);
    XF86VidModeEventPtr	pEv, *pPrev;

    if (!pPriv)
	return TRUE;
    for (pPrev = &pPriv->events; pEv = *pPrev; pPrev = &pEv->next)
	if (pEv == pOld)
	    break;
    if (!pEv)
	return TRUE;
    *pPrev = pEv->next;
    xfree (pEv);
    CheckScreenPrivate (pScreen);
    return TRUE;
}

static void
SendXF86VidModeNotify (pScreen, state, forced)
    ScreenPtr	pScreen;
    int	    state;
    Bool    forced;
{
    XF86VidModeScreenPrivatePtr	pPriv;
    XF86VidModeEventPtr		pEv;
    unsigned long		mask;
    xXF86VidModeNotifyEvent	ev;
    ClientPtr			client;
    int				kind;

    UpdateCurrentTimeIf ();
    mask = XF86VidModeNotifyMask;
    pScreen = screenInfo.screens[pScreen->myNum];
    pPriv = GetScreenPrivate(pScreen);
    if (!pPriv)
	return;
    kind = XF86VidModeModeChange;
    for (pEv = pPriv->events; pEv; pEv = pEv->next)
    {
	client = pEv->client;
	if (client->clientGone)
	    continue;
	if (!(pEv->mask & mask))
	    continue;
	ev.type = XF86VidModeNotify + XF86VidModeEventBase;
	ev.state = state;
	ev.sequenceNumber = client->sequence;
	ev.timestamp = currentTime.milliseconds;
	ev.root = WindowTable[pScreen->myNum]->drawable.id;
	ev.kind = kind;
	ev.forced = forced;
	WriteEventsToClient (client, 1, (xEvent *) &ev);
    }
}

static void
SXF86VidModeNotifyEvent (from, to)
    xXF86VidModeNotifyEvent *from, *to;
{
    to->type = from->type;
    to->state = from->state;
    cpswaps (from->sequenceNumber, to->sequenceNumber);
    cpswapl (from->timestamp, to->timestamp);    
    cpswapl (from->root, to->root);    
    to->kind = from->kind;
    to->forced = from->forced;
}
#endif
	
static int
ProcXF86VidModeQueryVersion(client)
    register ClientPtr client;
{
    xXF86VidModeQueryVersionReply rep;
    register int n;

    REQUEST_SIZE_MATCH(xXF86VidModeQueryVersionReq);
    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    rep.majorVersion = XF86VIDMODE_MAJOR_VERSION;
    rep.minorVersion = XF86VIDMODE_MINOR_VERSION;
    if (client->swapped) {
    	swaps(&rep.sequenceNumber, n);
    	swapl(&rep.length, n);
    	swaps(&rep.majorVersion, n);
    	swaps(&rep.minorVersion, n);
    }
    WriteToClient(client, sizeof(xXF86VidModeQueryVersionReply), (char *)&rep);
    return (client->noClientException);
}

static int
ProcXF86VidModeGetModeLine(client)
    register ClientPtr client;
{
    REQUEST(xXF86VidModeGetModeLineReq);
    xXF86VidModeGetModeLineReply rep;
    register int n;
    ScrnInfoPtr vptr;
    DisplayModePtr mptr;
    int privsize;

    if (stuff->screen > screenInfo.numScreens)
	return BadValue;

    vptr = (ScrnInfoPtr) screenInfo.screens[stuff->screen]->devPrivates[xf86ScreenIndex].ptr;
    mptr = vptr->modes;

    if (!mptr->Private)
	privsize = 0;
    else
	privsize = mptr->PrivSize;

    REQUEST_SIZE_MATCH(xXF86VidModeGetModeLineReq);
    rep.type = X_Reply;