Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!wuarchive!psuvax1!psuvm!cxt105
From: CXT105@psuvm.psu.edu (Christopher Tate)
Newsgroups: comp.sys.mac.programmer
Subject: Rotating bitmaps
Message-ID: <90244.145341CXT105@psuvm.psu.edu>
Date: 1 Sep 90 18:53:41 GMT
Organization: Penn State University
Lines: 18

What is a good, fast, accepted method for rotating bitmaps?  Going bit by
bit seems like a terribly inefficient way to do it, but I'm having trouble
coming up with a more "intimate" method that isn't terribly complicated.

Mostly, I just want to be able to rotate text in an offscreen bitmap to
multiples of 90 degree orientations.  I'm working in C, so I have access
to inline assembly and all those wonderful bit operators.

Also, rotating bitmaps seems like a much easier task than rotating pixmaps.
Although I don't have to work with pixmaps for the particular project I'm
working on now, I may have to sometime....  Info on this problem would
also be appreciated.

-------
Christopher Tate           |    "In a fit of perverse brilliance, Carl the
                           |     repairman mistook a room humidifier for a
cxt105@psuvm.psu.edu       |     mid-size computer, but managed to get it
cxt105@psuvm.bitnet        |     to connect to the network anyway."