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From: harkcom@potato.pa.Yokogawa.Co.jp (Alton Harkcom)
Newsgroups: comp.windows.x
Subject: Re: Shaping windows in Xlib
Message-ID: <HARKCOM.90Sep14100432@potato.pa.Yokogawa.Co.jp>
Date: 14 Sep 90 15:04:32 GMT
References: <HARKCOM.90Sep10190140@potato.pa.Yokogawa.CO.JP>
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In-reply-to: harkcom@potato.pa.Yokogawa.Co.jp's message of 14 Sep 90 02:01:56 GMT


   I got so many requests for the info that I decided to post a summary :-)

The first reply I got was from:

 =}	rws@expo.lcs.mit.edu (Bob Scheifler)
 =}
 =}	Take a look at mit/lib/Xmu/ShapeWidg.c, particularly the
 =}	internal function ShapeEllipseorRoundedRectangle.  Even
 =}	if you don't know Xt, you should be able to figure it out.

I took a look and found many things that are useful to me. Gave me a lot
of new toys to play with :-)

The next came from:

 =}	der Mouse  <mouse@Larry.McRCIM.McGill.EDU>
 =}
 =}	Strictly speaking, this is not possible within Xlib.
 =}	However, the SHAPE extension looks and feels (:-) like
 =}	part of Xlib.  Assuming you accept it as such....
 =}
 =}	You use XShapeCombineRegion, XShapeCombineRectangles,
 =}	XShapeCombineMask, XShapeCombineShape, and/or
 =}	XShapeOffsetShape to manipulate window shapes. (There
 =}	are other routines as well; see the documentation.) In
 =}	your case, I would guess that you probably want to
 =}	use XShapeCombineMask.

Which gave me even more toys to play with :-)

And from:

 =}	janssen@parc.xerox.com
 =}
 =}	You will need to use the Shape extension.
 =}	Here's a simple example program:

[edited to be as small as I could make it... Al]

#include <Xlib.h>
#include <extensions/shape.h>	/* include file for X extensions */

#define N	100

main (ac, av)
int ac;
char **av;
{
	Display	*d;
	Window	w;
	Pixmap	bmp;
	long	junk;

	d = XOpenDisplay("");
	w = XCreateSimpleWindow(d, DefaultRootWindow(d), N, N, N, N, 0, 0, 3);
	XReadBitmapFile (d, w, av[1], &junk, &junk, &bmp, &junk, &junk);
	XShapeCombineMask(d, w, ShapeBounding, 0, 0, bmp, ShapeSet);
	XMapWindow (d, w);
	XFlush(d);
	sleep(60);
	XCloseDisplay(d);
}

I appreciate all of the help, thank you :-)

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