Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!spdcc!m2c!ulowell!masscomp!black
From: black@masscomp.UUCP (Sam Black)
Newsgroups: comp.windows.x
Subject: Re: bitmaps and backgrounds
Message-ID: <2442@masscomp.UUCP>
Date: Thu, 22-Oct-87 09:53:35 EST
Article-I.D.: masscomp.2442
Posted: Thu Oct 22 09:53:35 1987
Date-Received: Sun, 25-Oct-87 09:43:41 EST
References: <885@godot.radonc.unc.edu>
Reply-To: black@masscomp.UUCP (Sam Black)
Organization: MASSCOMP - Westford, Ma
Lines: 56
Keywords: sigh

Summary:

Expires:

Sender:

Followup-To:

Distribution:


In article <885@godot.radonc.unc.edu> sherouse@godot.radonc.unc.edu (George W. Sherouse) writes:
>
>In my fix to XMenu I used a loop over planes to XCopyPlane from the
>bitmap to the pixmap.  I am still not convinced that that is the best
>way to expand a bitmap, but that aside it seems clear to me that a new
>function or macro is needed to prevent ongoing transportability
>also reiterate the requirement that the Pixmap and Window be of the
>same depth.
>
>...  I would propose either XSetWindowBackgroundBitmap
>(functionally identical to XSetWindowBackgroundPixmap but taking a
>bitmap as an argument and expanding it internally) and/or
>XMakePixmapFromBitmap (to standardize the expansion technique) be
>added to Xlib.

There is really no reason to iterate over planes as Mr. Sherouse describes.
For what it's worth:

Pixmap
XMakePixmapFromBitmap(dpy, bitmap, width, height, depth, fg, bg)
Disply *dpy;
Pixmap bitmap;		/* source pixmap (depth 1) */
int width, height;	/* normally same as bitmap dimensione */
int depth;		/* normally DefaultDepth(dpy, DefaultScreen(dpy)) */
int fg, bg;		/* foreground and background colors */
{
	GC gc;
	XGCValues gcv;
	Pixmap pixmap = XCreatePixmap(dpy, width, height, depth);

	if (pixmap)
	{
		gcv.foreground = fg;
		gcv.background = bg;
		gcv.graphics_exposures = 0;
		gc = XCreateGC(dpy, pixmap,
			(GCForeground | GCBackground | GCGraphicsExposures),
			&gcv);
		XCopyPlane(dpy, bitmap, pixmap, gc, 0, 0,
			width, height, 0, 0, 1);
		XFreeGC(dpy, gc);
	}

	return(pixmap);
}

		- sam black

--------------------------------------

I'm pink, therefore I'm Spam.

	...!{cca,decvax,seismo}!masscomp!black	UUCP
	black%masscomp.uucp@<internet gateway>	Internet

--------------------------------------