main.c

远程桌面连接工具

/***********************************************************

Copyright (c) 1987  X Consortium

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 THE
X CONSORTIUM 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 the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.


Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

******************************************************************/
/* $XConsortium: main.c /main/82 1996/09/28 17:12:09 rws $ */
/* $XFree86: xc/programs/Xserver/dix/main.c,v 3.10.2.2 1998/01/22 10:47:08 dawes Exp $ */

#define NEED_EVENTS
#include "X.h"
#include "Xproto.h"
#include "scrnintstr.h"
#include "misc.h"
#include "os.h"
#include "windowstr.h"
#include "resource.h"
#include "dixstruct.h"
#include "gcstruct.h"
#include "extension.h"
#include "extnsionst.h"
#include "colormap.h"
#include "colormapst.h"
#include "cursorstr.h"
#include "font.h"
#include "opaque.h"
#include "servermd.h"
#include "site.h"
#include "dixfont.h"
#include "dixevents.h"		/* InitEvents() */
#include "dispatch.h"		/* InitProcVectors() */

extern CARD32 defaultScreenSaverTime;
extern CARD32 defaultScreenSaverInterval;
extern int defaultScreenSaverBlanking;
extern int defaultScreenSaverAllowExposures;

#ifdef DPMSExtension
#include "dpms.h"
#endif

void ddxGiveUp();

extern int InitClientPrivates(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern void Dispatch(
#if NeedFunctionPrototypes
    void
#endif
);

extern char *display;
char *ConnectionInfo;
xConnSetupPrefix connSetupPrefix;

extern WindowPtr *WindowTable;
extern FontPtr defaultFont;
extern int screenPrivateCount;

static Bool CreateConnectionBlock(
#if NeedFunctionPrototypes
    void
#endif
);

static void FreeScreen(
#if NeedFunctionPrototypes
    ScreenPtr /*pScreen*/
#endif
);

PaddingInfo PixmapWidthPaddingInfo[33];

#ifdef INTERNAL_VS_EXTERNAL_PADDING
/* add padding info for 32-bit interface. PutImage and GetImage will
 * work on 32-bit padding while the rest of the server will work
 * on 64-bit padding (Alpha).
 */
PaddingInfo PixmapWidthPaddingInfoProto[33];
#endif

int connBlockScreenStart;

static int restart = 0;

/*
 * Dummy entry for EventSwapVector[]
 */
/*ARGSUSED*/
void
NotImplemented(
#if NeedFunctionPrototypes && defined(EVENT_SWAP_PTR)
	xEvent * from,
	xEvent * to
#endif
	)
{
    FatalError("Not implemented");
}

/*
 * Dummy entry for ReplySwapVector[]
 */
/*ARGSUSED*/
void
ReplyNotSwappd(
#if NeedNestedPrototypes
	ClientPtr pClient ,
	int size ,
	void * pbuf
#endif
	)
{
    FatalError("Not implemented");
}

/*
 * This array encodes the answer to the question "what is the log base 2
 * of the number of pixels that fit in a scanline pad unit?"
 * Note that ~0 is an invalid entry (mostly for the benefit of the reader).
 */
static int answer[6][4] = {
	/* pad   pad   pad     pad*/
	/*  8     16    32    64 */

	{   3,     4,    5 ,   6 },	/* 1 bit per pixel */
	{   1,     2,    3 ,   4 },	/* 4 bits per pixel */
	{   0,     1,    2 ,   3 },	/* 8 bits per pixel */
	{   ~0,    0,    1 ,   2 },	/* 16 bits per pixel */
	{   ~0,    ~0,   0 ,   1 },	/* 24 bits per pixel */
	{   ~0,    ~0,   0 ,   1 }	/* 32 bits per pixel */
};

/*
 * This array gives the answer to the question "what is the first index for
 * the answer array above given the number of bits per pixel?"
 * Note that ~0 is an invalid entry (mostly for the benefit of the reader).
 */
static int indexForBitsPerPixel[ 33 ] = {
	~0, 0, ~0, ~0,	/* 1 bit per pixel */
	1, ~0, ~0, ~0,	/* 4 bits per pixel */
	2, ~0, ~0, ~0,	/* 8 bits per pixel */
	~0,~0, ~0, ~0,
	3, ~0, ~0, ~0,	/* 16 bits per pixel */
	~0,~0, ~0, ~0,
	4, ~0, ~0, ~0,	/* 24 bits per pixel */
	~0,~0, ~0, ~0,
	5		/* 32 bits per pixel */
};

/*
 * This array gives the bytesperPixel value for cases where the number
 * of bits per pixel is a multiple of 8 but not a power of 2.
 */
static int answerBytesPerPixel[ 33 ] = {
	~0, 0, ~0, ~0,	/* 1 bit per pixel */
	0, ~0, ~0, ~0,	/* 4 bits per pixel */
	0, ~0, ~0, ~0,	/* 8 bits per pixel */
	~0,~0, ~0, ~0,
	0, ~0, ~0, ~0,	/* 16 bits per pixel */
	~0,~0, ~0, ~0,
	3, ~0, ~0, ~0,	/* 24 bits per pixel */
	~0,~0, ~0, ~0,
	0		/* 32 bits per pixel */
};

/*
 * This array gives the answer to the question "what is the second index for
 * the answer array above given the number of bits per scanline pad unit?"
 * Note that ~0 is an invalid entry (mostly for the benefit of the reader).
 */
static int indexForScanlinePad[ 65 ] = {
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	 0, ~0, ~0, ~0,	/* 8 bits per scanline pad unit */
	~0, ~0, ~0, ~0,
	 1, ~0, ~0, ~0,	/* 16 bits per scanline pad unit */
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	 2, ~0, ~0, ~0,	/* 32 bits per scanline pad unit */
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	~0, ~0, ~0, ~0,
	 3		/* 64 bits per scanline pad unit */
};


int
main(argc, argv)
    int		argc;
    char	*argv[];
{
    int		i, j, k;
    HWEventQueueType	alwaysCheckForInput[2];

    /* Notice if we're restart.  Probably this is because we jumped through
     * uninitialized pointer */
    if (restart)
	FatalError("server restarted. Jumped through uninitialized pointer?\n");
    else
	restart = 1;

#if 0
    ExpandCommandLine(&argc, &argv);
#endif

    /* These are needed by some routines which are called from interrupt
     * handlers, thus have no direct calling path back to main and thus
     * can't be passed argc, argv as parameters */
    argcGlobal = argc;
    argvGlobal = argv;
    display = "0";
    ProcessCommandLine(argc, argv);

    alwaysCheckForInput[0] = 0;
    alwaysCheckForInput[1] = 1;
    while(1)
    {
	serverGeneration++;
        ScreenSaverTime = defaultScreenSaverTime;
	ScreenSaverInterval = defaultScreenSaverInterval;
	ScreenSaverBlanking = defaultScreenSaverBlanking;
	ScreenSaverAllowExposures = defaultScreenSaverAllowExposures;
#ifdef DPMSExtension
	DPMSStandbyTime = defaultDPMSStandbyTime;
	DPMSSuspendTime = defaultDPMSSuspendTime;
	DPMSOffTime = defaultDPMSOffTime;
	DPMSEnabled = defaultDPMSEnabled;
	DPMSPowerLevel = 0;
#endif
	InitBlockAndWakeupHandlers();
	/* Perform any operating system dependent initializations you'd like */
	OsInit();		
	if(serverGeneration == 1)
	{
	    CreateWellKnownSockets();
	    InitProcVectors();
	    clients = (ClientPtr *)xalloc(MAXCLIENTS * sizeof(ClientPtr));
	    if (!clients)
		FatalError("couldn't create client array");
	    for (i=1; i<MAXCLIENTS; i++) 
		clients[i] = NullClient;
	    serverClient = (ClientPtr)xalloc(sizeof(ClientRec));
	    if (!serverClient)
		FatalError("couldn't create server client");
	    InitClient(serverClient, 0, (pointer)NULL);
	}
	else
	    ResetWellKnownSockets ();
        clients[0] = serverClient;
        currentMaxClients = 1;

	if (!InitClientResources(serverClient))      /* for root resources */
	    FatalError("couldn't init server resources");

	SetInputCheck(&alwaysCheckForInput[0], &alwaysCheckForInput[1]);
	screenInfo.arraySize = MAXSCREENS;
	screenInfo.numScreens = 0;
	screenInfo.numVideoScreens = -1;
	WindowTable = (WindowPtr *)xalloc(MAXSCREENS * sizeof(WindowPtr));
	if (!WindowTable)
	    FatalError("couldn't create root window table");

	/*
	 * Just in case the ddx doesnt supply a format for depth 1 (like qvss).
	 */
	j = indexForBitsPerPixel[ 1 ];
	k = indexForScanlinePad[ BITMAP_SCANLINE_PAD ];
	PixmapWidthPaddingInfo[1].padRoundUp = BITMAP_SCANLINE_PAD-1;
	PixmapWidthPaddingInfo[1].padPixelsLog2 = answer[j][k];
 	j = indexForBitsPerPixel[8]; /* bits per byte */
 	PixmapWidthPaddingInfo[1].padBytesLog2 = answer[j][k];

#ifdef INTERNAL_VS_EXTERNAL_PADDING
	/* Fake out protocol interface to make them believe we support
	 * a different padding than the actual internal padding.
	 */
	j = indexForBitsPerPixel[ 1 ];
	k = indexForScanlinePad[ BITMAP_SCANLINE_PAD_PROTO ];
	PixmapWidthPaddingInfoProto[1].padRoundUp = BITMAP_SCANLINE_PAD_PROTO-1;
	PixmapWidthPaddingInfoProto[1].padPixelsLog2 = answer[j][k];
 	j = indexForBitsPerPixel[8]; /* bits per byte */
 	PixmapWidthPaddingInfoProto[1].padBytesLog2 = answer[j][k];
#endif /* INTERNAL_VS_EXTERNAL_PADDING */

	InitAtoms();
	InitEvents();
	InitGlyphCaching();
	ResetClientPrivates();
	ResetScreenPrivates();
	ResetWindowPrivates();
	ResetGCPrivates();
#ifdef PIXPRIV
	ResetPixmapPrivates();
#endif
	ResetColormapPrivates();
	ResetFontPrivateIndex();
	InitCallbackManager();
	InitOutput(&screenInfo, argc, argv);
	if (screenInfo.numScreens < 1)
	    FatalError("no screens found");
	if (screenInfo.numVideoScreens < 0)
	    screenInfo.numVideoScreens = screenInfo.numScreens;
#ifdef XPRINT
	PrinterInitOutput(&screenInfo, argc, argv);
#endif
	InitExtensions(argc, argv);
	if (!InitClientPrivates(serverClient))
	    FatalError("failed to allocate serverClient devprivates");
	for (i = 0; i < screenInfo.numScreens; i++)
	{
	    ScreenPtr pScreen = screenInfo.screens[i];
	    if (!CreateScratchPixmapsForScreen(i))
		FatalError("failed to create scratch pixmaps");
	    if (pScreen->CreateScreenResources &&
		!(*pScreen->CreateScreenResources)(pScreen))
		FatalError("failed to create screen resources");
	    if (!CreateGCperDepth(i))
		FatalError("failed to create scratch GCs");
	    if (!CreateDefaultStipple(i))
		FatalError("failed to create default stipple");
	    if (!CreateRootWindow(pScreen))
		FatalError("failed to create root window");
	}
	InitInput(argc, argv);