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    ACfax - Fax reception with X11-interface for amateur radio
    Copyright (C) 1995-1998 Andreas Czechanowski, DL4SDC

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software Foundation,
    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 * global.h - header file for acfax.c

#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Core.h>

/* this file contains some definitions and constants : */
#define C_WIDTH         800
#define C_HEIGHT  600

/* X11-related external variables */
extern Display    *dpy;       /* the X-Display to use */
extern Screen     *scr;       /* screen of the display */
extern Visual     *cvisual;   /* The visual to use */
extern Pixmap     cpxmap;           /* pixmap of the canvas widget */
extern GC   cgc;        /* GC for XPutImage to cpxmap */
extern XEvent     event;          /* for XtAppNextEvent / XtDispatchEvent */
extern Colormap cmap, rootcmap;     /* colormap we use, and default-colormap */
extern Widget     canvas;
extern XtAppContext mainapp;
extern XtIntervalId chstime;

extern XImage     *horimag, *verimag;     / intermediate-storages /
extern unsigned coltab[256];  / mapping table linear grayscale->pixel-value /
extern unsigned canwid, canhei;     / width/height of canvas widget /
extern int  xpos, ypos, imline;
extern char *core_dta, *core_start, *core_wptr, *core_maxptr;

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