Path: utzoo!attcan!uunet!ogicse!uwm.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!elroy.jpl.nasa.gov!jarthur!mwilkins
From: mwilkins@jarthur.Claremont.EDU (Mark Wilkins)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Need help creating a Quickdraw picture
Message-ID: <7358@jarthur.Claremont.EDU>
Date: 1 Jun 90 10:05:39 GMT
References: <2205@dftsrv.gsfc.nasa.gov>
Organization: Harvey Mudd College, Claremont, CA 91711
Lines: 21

In article <2205@dftsrv.gsfc.nasa.gov> seiler@amarna.gsfc.nasa.gov writes:


>CopyBits(&(windPtr->portBits), &(windPtr->portBits),
>         &(windPtr->portRect), &(windPtr->portRect), srcCopy, NULL);


  CopyBits just doesn't like it if the source and destination bitmaps are
the same, and I THINK it doesn't like it if the same rectangle data
structure is passed in both places.

  What you need to do is create an offscreen bitmap and copybits the data
into the window.  There are several Tech Notes available from Apple.com
describing how to do just that.

-- Mark Wilkins
-- 
  "According  to  our  contract, at  precisely  midnight  of  the  night 
  of her greatest triumph,  the party of the first  part,  (that's you), 
  agrees to render up  her soul,  now and  forevermore,  to the party of 
  the second part.  (That's me).  Shall we go?"