Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!rutgers!psuvax1!swatsun!jackiw
From: jackiw@cs.swarthmore.edu (Nick Jackiw)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Getting a bit image into a Picture
Message-ID: <0X6N3PD@cs.swarthmore.edu>
Date: 18 Aug 90 16:28:29 GMT
References: <9952@rice-chex.ai.mit.edu>
Reply-To: jackiw@cs.swarthmore.edu (Nick Jackiw)
Organization: Visual Geometry Project, Swarthmore College, PA
Lines: 19

hqm@wheaties.ai.mit.edu (Henry Minsky) writes:
> According to the manual, once you have done an OpenPicture, all QuickDraw
> commands will be recorded in the Picture. But how about bitmaps? I don't
> think doing CopyBits gets recorded in the Picture, but I can't tell
> from the docs in Inside Mac I. 
> 

CopyBits calls *can* get recorded in openPictures.  You've got to convince
Quickdraw to do it by copying into the port which is currently recording
the picture.  If your bit image already exists in the port, you can copy
from the port^.portBits to thePort^.portBits, with your srcRect equal to
your destRect.  On paper, this looks like a no-op, but Quickdraw's
picture-recording procedure intercepts the bits and records them in
the picture.   
-- 
     _  _|\____    Nick Jackiw | Visual Geometry Project | Math Department
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