Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!mailrus!uflorida!gatech!ukma!psuvm.bitnet!dn5
From: DN5@PSUVM.BITNET (D. Jay Newman)
Newsgroups: comp.sys.mac.programmer
Subject: CopyBits and the Mac II
Message-ID: <51404DN5@PSUVM>
Date: 30 Aug 88 19:45:58 GMT
Organization: The Pennsylvania State University - Computation Center
Lines: 18

Hi out there:

I am programming a simple animation on the Mac (a simple polygon rotating
around the center), and to make it smoother I used an off-screen bitmap,
and I used CopyBits to get it onto the screen (like TechNote 41).

This works correctly with a Mac Plus, but the Mac II includes a lot of
garbage in the rectangle with the rotating polygon:  I can still see the
rotation (very fast on the II), but there is what appears to be random noise.
The same thing happens on both IIs that I have available.

The system I am using is MPW Pascal, with MacApp.  I am using srcCopy as
the copy mode in CopyBits, and I am copying from a standard BitMap to the
BitMap of a standard WindowPtr.

I would appreciate any help or pointers I could get.

                                  Thank You,
                                      Jay, etc...