xinerama.c

网络MPEG4IP流媒体开发源代码

/* $Xorg: XPanoramiX.c,v 1.4 2000/08/17 19:45:51 cpqbld Exp $ */
/*****************************************************************
Copyright (c) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts.
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.

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
DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING,
BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL 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 Digital Equipment Corporation
shall not be used in advertising or otherwise to promote the sale, use or other
dealings in this Software without prior written authorization from Digital
Equipment Corporation.
******************************************************************/
/* $XFree86: xc/lib/Xinerama/Xinerama.c,v 1.2 2001/07/23 17:20:28 dawes Exp $ */

#define NEED_EVENTS
#define NEED_REPLIES
#include <X11/Xlibint.h>
#include <X11/Xutil.h>
#include <X11/extensions/Xext.h>	/* in ../include */
#include "extutil.h"			/* in ../include */
#include "panoramiXext.h"
#include "panoramiXproto.h"		/* in ../include */
#include "Xinerama.h"


static XExtensionInfo _panoramiX_ext_info_data;
static XExtensionInfo *panoramiX_ext_info = &_panoramiX_ext_info_data;
static /* const */ char *panoramiX_extension_name = PANORAMIX_PROTOCOL_NAME;

#define PanoramiXCheckExtension(dpy,i,val) \
  XextCheckExtension (dpy, i, panoramiX_extension_name, val)
#define PanoramiXSimpleCheckExtension(dpy,i) \
  XextSimpleCheckExtension (dpy, i, panoramiX_extension_name)

static int close_display();
static /* const */ XExtensionHooks panoramiX_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, panoramiX_ext_info,
				   panoramiX_extension_name, 
				   &panoramiX_extension_hooks,
				   0, NULL)

static XEXT_GENERATE_CLOSE_DISPLAY (close_display, panoramiX_ext_info)



/****************************************************************************
 *                                                                          *
 *			    PanoramiX public interfaces                         *
 *                                                                          *
 ****************************************************************************/

Bool SDL_NAME(XPanoramiXQueryExtension) (
    Display *dpy,
    int *event_basep,
    int *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;
    }
}


Status SDL_NAME(XPanoramiXQueryVersion)(
    Display *dpy,
    int	    *major_versionp, 
    int *minor_versionp
)
{
    XExtDisplayInfo *info = find_display (dpy);
    xPanoramiXQueryVersionReply	    rep;
    register xPanoramiXQueryVersionReq  *req;

    PanoramiXCheckExtension (dpy, info, 0);

    LockDisplay (dpy);
    GetReq (PanoramiXQueryVersion, req);
    req->reqType = info->codes->major_opcode;
    req->panoramiXReqType = X_PanoramiXQueryVersion;
    req->clientMajor = PANORAMIX_MAJOR_VERSION;
    req->clientMinor = PANORAMIX_MINOR_VERSION;
    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
	UnlockDisplay (dpy);
	SyncHandle ();
	return 0;
    }
    *major_versionp = rep.majorVersion;
    *minor_versionp = rep.minorVersion;
    UnlockDisplay (dpy);
    SyncHandle ();
    return 1;
}

SDL_NAME(XPanoramiXInfo) *SDL_NAME(XPanoramiXAllocInfo)(void)
{
	return (SDL_NAME(XPanoramiXInfo) *) Xmalloc (sizeof (SDL_NAME(XPanoramiXInfo)));
}

Status SDL_NAME(XPanoramiXGetState) (
    Display		*dpy,
    Drawable		drawable,
    SDL_NAME(XPanoramiXInfo)	*panoramiX_info
)
{
    XExtDisplayInfo			*info = find_display (dpy);
    xPanoramiXGetStateReply	rep;
    register xPanoramiXGetStateReq	*req;

    PanoramiXCheckExtension (dpy, info, 0);

    LockDisplay (dpy);
    GetReq (PanoramiXGetState, req);
    req->reqType = info->codes->major_opcode;
    req->panoramiXReqType = X_PanoramiXGetState;
    req->window = drawable;
    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
	UnlockDisplay (dpy);
	SyncHandle ();
	return 0;
    }
    UnlockDisplay (dpy);
    SyncHandle ();
    panoramiX_info->window = rep.window;
    panoramiX_info->State = rep.state;
    return 1;
}

Status SDL_NAME(XPanoramiXGetScreenCount) (
    Display		*dpy,
    Drawable		drawable,
    SDL_NAME(XPanoramiXInfo)	*panoramiX_info
)
{
    XExtDisplayInfo			*info = find_display (dpy);
    xPanoramiXGetScreenCountReply	rep;
    register xPanoramiXGetScreenCountReq	*req;

    PanoramiXCheckExtension (dpy, info, 0);

    LockDisplay (dpy);
    GetReq (PanoramiXGetScreenCount, req);
    req->reqType = info->codes->major_opcode;
    req->panoramiXReqType = X_PanoramiXGetScreenCount;
    req->window = drawable;
    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
	UnlockDisplay (dpy);
	SyncHandle ();
	return 0;
    }
    UnlockDisplay (dpy);
    SyncHandle ();
    panoramiX_info->window = rep.window;
    panoramiX_info->ScreenCount = rep.ScreenCount;
    return 1;
}

Status SDL_NAME(XPanoramiXGetScreenSize) (
    Display		*dpy,
    Drawable		drawable,
    int			screen_num,
    SDL_NAME(XPanoramiXInfo)	*panoramiX_info
)
{
    XExtDisplayInfo			*info = find_display (dpy);
    xPanoramiXGetScreenSizeReply	rep;
    register xPanoramiXGetScreenSizeReq	*req;

    PanoramiXCheckExtension (dpy, info, 0);

    LockDisplay (dpy);
    GetReq (PanoramiXGetScreenSize, req);
    req->reqType = info->codes->major_opcode;
    req->panoramiXReqType = X_PanoramiXGetScreenSize;
    req->window = drawable;
    req->screen = screen_num;			/* need to define */ 
    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
	UnlockDisplay (dpy);
	SyncHandle ();
	return 0;
    }
    UnlockDisplay (dpy);
    SyncHandle ();
    panoramiX_info->window = rep.window;
    panoramiX_info->screen = rep.screen;
    panoramiX_info->width =  rep.width;
    panoramiX_info->height = rep.height;
    return 1;
}

/*******************************************************************\
  Alternate interface to make up for shortcomings in the original,
  namely, the omission of the screen origin.  The new interface is
  in the "Xinerama" namespace instead of "PanoramiX".
\*******************************************************************/

Bool SDL_NAME(XineramaQueryExtension) (
   Display *dpy,
   int     *event_base,
   int     *error_base
)
{
   return SDL_NAME(XPanoramiXQueryExtension)(dpy, event_base, error_base);
}

Status SDL_NAME(XineramaQueryVersion)(
   Display *dpy,
   int     *major,
   int     *minor
)
{
   return SDL_NAME(XPanoramiXQueryVersion)(dpy, major, minor);
}

Bool SDL_NAME(XineramaIsActive)(Display *dpy)
{
    xXineramaIsActiveReply	rep;
    xXineramaIsActiveReq  	*req;
    XExtDisplayInfo 		*info = find_display (dpy);

    if(!XextHasExtension(info))
	return False;  /* server doesn't even have the extension */

    LockDisplay (dpy);
    GetReq (XineramaIsActive, req);
    req->reqType = info->codes->major_opcode;
    req->panoramiXReqType = X_XineramaIsActive;
    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
	UnlockDisplay (dpy);
	SyncHandle ();
	return False;
    }
    UnlockDisplay (dpy);
    SyncHandle ();
    return rep.state;
}

#include <stdio.h>

SDL_NAME(XineramaScreenInfo) * 
SDL_NAME(XineramaQueryScreens)(
   Display *dpy,
   int     *number
)
{
    XExtDisplayInfo		*info = find_display (dpy);
    xXineramaQueryScreensReply	rep;
    xXineramaQueryScreensReq	*req;
    SDL_NAME(XineramaScreenInfo)		*scrnInfo = NULL;

    PanoramiXCheckExtension (dpy, info, 0);

    LockDisplay (dpy);
    GetReq (XineramaQueryScreens, req);
    req->reqType = info->codes->major_opcode;
    req->panoramiXReqType = X_XineramaQueryScreens;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
	UnlockDisplay (dpy);
	SyncHandle ();
	return NULL;
    }

    if(rep.number) {
	if((scrnInfo = Xmalloc(sizeof(SDL_NAME(XineramaScreenInfo)) * rep.number))) {
	    xXineramaScreenInfo scratch;
	    int i;

	    for(i = 0; i < rep.number; i++) {
		_XRead(dpy, (char*)(&scratch), sz_XineramaScreenInfo);
		scrnInfo[i].screen_number = i;
		scrnInfo[i].x_org 	  = scratch.x_org;
		scrnInfo[i].y_org 	  = scratch.y_org;
		scrnInfo[i].width 	  = scratch.width;
		scrnInfo[i].height 	  = scratch.height;
	    }

	    *number = rep.number;
	} else
	    _XEatData(dpy, rep.length << 2);
    }

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