xsrc/external/mit/ctwm/dist/gc.c

/*****************************************************************************/
/**       Copyright 1988 by Evans & Sutherland Computer Corporation,        **/
/**                          Salt Lake City, Utah                           **/
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/* 
 *  [ ctwm ]
 *
 *  Copyright 1992 Claude Lecommandeur.
 *            
 * Permission to use, copy, modify  and distribute this software  [ctwm] and
 * its documentation for any purpose is hereby granted without fee, provided
 * that the above  copyright notice appear  in all copies and that both that
 * copyright notice and this permission notice appear in supporting documen-
 * tation, and that the name of  Claude Lecommandeur not be used in adverti-
 * sing or  publicity  pertaining to  distribution of  the software  without
 * specific, written prior permission. Claude Lecommandeur make no represen-
 * tations  about the suitability  of this software  for any purpose.  It is
 * provided "as is" without express or implied warranty.
 *
 * Claude Lecommandeur DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL  IMPLIED WARRANTIES OF  MERCHANTABILITY AND FITNESS.  IN NO
 * EVENT SHALL  Claude Lecommandeur  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.
 *
 * Author:  Claude Lecommandeur [ lecom@sic.epfl.ch ][ April 1992 ]
 */


/**********************************************************************
 *
 * $XConsortium: gc.c,v 1.22 91/01/09 17:13:12 rws Exp $
 *
 * Open the fonts and create the GCs
 *
 * 31-Mar-88 Tom LaStrange        Initial Version.
 *
 * Do the necessary modification to be integrated in ctwm.
 * Can no longer be used for the standard twm.
 *
 * 22-April-92 Claude Lecommandeur.
 *
 *
 **********************************************************************/

#include <stdio.h>
#include "twm.h"
#include "util.h"
#include "gram.tab.h"
#include "screen.h"
#include "gc.h"

extern void twmrc_error_prefix(void);

/***********************************************************************
 *
 *  Procedure:
 *	CreateGCs - open fonts and create all the needed GC's.  I only
 *		    want to do this once, hence the first_time flag.
 *
 ***********************************************************************
 */

void CreateGCs(void)
{
    static ScreenInfo *prevScr = NULL;
    XGCValues	    gcv;
    unsigned long   gcm;
    static unsigned char greypattern [] = {0x0f, 0x05, 0x0f, 0x0a};
    Pixmap        greypixmap;
    static char	dashlist [2] = {1, 1};

    if (!Scr->FirstTime || prevScr == Scr)
	return;

    prevScr = Scr;

    /* create GC's */

    gcm = 0;
    gcm |= GCFunction;	    gcv.function = GXxor;
    gcm |= GCLineWidth;	    gcv.line_width = 0;
    gcm |= GCForeground;    gcv.foreground = Scr->XORvalue;
    gcm |= GCSubwindowMode; gcv.subwindow_mode = IncludeInferiors;

    Scr->DrawGC = XCreateGC(dpy, Scr->Root, gcm, &gcv);

    gcm = 0;
    gcm |= GCForeground;    gcv.foreground = Scr->MenuC.fore;
    gcm |= GCBackground;    gcv.background = Scr->MenuC.back;

    Scr->MenuGC = XCreateGC(dpy, Scr->Root, gcm, &gcv);

    gcm = 0;
    gcm |= GCPlaneMask;	    gcv.plane_mask = AllPlanes;
    /*
     * Prevent GraphicsExpose and NoExpose events.  We'd only get NoExpose
     * events anyway;  they cause BadWindow errors from XGetWindowAttributes
     * call in FindScreenInfo (events.c) (since drawable is a pixmap).
     */
    gcm |= GCGraphicsExposures;  gcv.graphics_exposures = False;
    gcm |= GCLineWidth;	    gcv.line_width = 0;

    Scr->NormalGC = XCreateGC(dpy, Scr->Root, gcm, &gcv);

    greypixmap = XCreatePixmapFromBitmapData(dpy, Scr->Root,
				(char *) greypattern, 4, 4, 1, 0, 1);

    if (Scr->Monochrome != COLOR) {
	gcm  = 0;
	gcm |= GCStipple;	gcv.stipple    = greypixmap;
	gcm |= GCFillStyle;	gcv.fill_style = FillOpaqueStippled;
	gcm |= GCForeground;	gcv.foreground = Scr->Black;
	gcm |= GCBackground;	gcv.background = Scr->White;
	Scr->BorderGC = XCreateGC (dpy, Scr->Root, gcm, &gcv);
	XSetDashes (dpy, Scr->BorderGC, 1, dashlist, 2);
    }
    else
    if (Scr->BeNiceToColormap) {
	gcm  = 0;
	gcm |= GCLineStyle;
	gcv.line_style = LineDoubleDash;
	Scr->BorderGC = XCreateGC (dpy, Scr->Root, gcm, &gcv);
	XSetDashes (dpy, Scr->BorderGC, 0, dashlist, 2);
    }
    else {
	Scr->BorderGC = XCreateGC (dpy, Scr->Root, 0, (XGCValues*) 0);
    }
}