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gc.c
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gc.c
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/*
* Copyright 1988 by Evans & Sutherland Computer Corporation,
* Salt Lake City, Utah
* Portions Copyright 1989 by the Massachusetts Institute of Technology
* Cambridge, Massachusetts
*
* Copyright 1992 Claude Lecommandeur.
*/
/**********************************************************************
*
* $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 "ctwm.h"
#include <stdio.h>
#include "gram.tab.h"
#include "screen.h"
#include "gc.h"
/***********************************************************************
*
* 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, NULL);
}
}