Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!hellgate.utah.edu!csn!samwise!devin
From: devin@samwise.Colorado.EDU (Yampalimardilor)
Newsgroups: comp.windows.x
Subject: XPutImage problem
Keywords: XPutImage into a 1-deep Pixmap
Message-ID: <1991Jan14.044003.29147@csn.org>
Date: 14 Jan 91 04:40:03 GMT
Sender: news@csn.org
Reply-To: devin@boulder.Colorado.EDU
Organization: University of Colorado, Boulder
Lines: 37
Nntp-Posting-Host: samwise.colorado.edu

This piece of code generates a BadMatch.  What am I doing wrong?

(I'm running vanilla MIT X11R4)

I'm trying to XPutImage an image into a 1 plane Pixmap.  If I comment
out the XPutImage, the BadMatch goes away, so I assume that it this
particular call that's doing it.

*** Start code

    map = XCreatePixmap(_display,DefaultRootWindow(_display),
			defaultwidth,defaultheight,1);
    char *mapdata = new char[defaultwidth*defaultheight];
    if ((fp = open(pathname,O_RDONLY)) < 0) {
	// ERROR
	delete mapdata;
	return;
    }
    if (read(fp,mapdata,defaultwidth*defaultheight) < 0) {
	// ERROR
	delete mapdata;
	return;
    }
    XImage *txi = XCreateImage(_display,_visual,1,XYBitmap,0,mapdata,
			       defaultwidth,defaultheight,8,defaultwidth);
    for (int i=0;i<defaultwidth*defaultheight;i++)
	if (mapdata[i]) mapdata[i] = 255;
    XPutImage(_display,map,_gc,txi,0,0,0,0,defaultwidth,defaultheight);

*** end code

	-Devin

Devin Hooker     (RP90)     DoD #0034
"Time - don't ponder it too long..."
"Performing on a stool we've a sight to make you drool
	Seven virgins and a mule.  Keep it cool.  Keep it cool." -ELP