Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!bloom-beacon!SABER.COM!jimf
From: jimf@SABER.COM
Newsgroups: comp.windows.x
Subject: Re: Bitmap scaling in X
Message-ID: <9009121428.AA20076@armory>
Date: 12 Sep 90 14:28:36 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 23

> Are there any functions in the X toolkit to provide for the scaling of
> bitmaps (pixmaps, actually, I suppose)?  If not, what are the methods most
> people are employing to quickly provide this capability over a range of
> hardware?

X does not provide any although several extensions to X do.  Sample
code to scale bitmap and color images exists within xloadimage in the
file zoom.c.  The algorithm used is simplistic but quite fast and
effective.  You can get xloadimage by anonymous ftp from
expo.lcs.mit.edu in /contrib/xloadimage.1.06.tar.Z or via email by
asking me.

Xloadimage version 1.07 will be available soon and will support
several more common image formats (eg MacPaint, xwd [even across
visual types], and all the PBM formats) and some other image
processing functions.  It will be announced on this forum when it is
available.

Happy hacking,

jim frost
saber software
jimf@saber.com