QuickDraw to bitmap question

[Michael Matessa <mm4b+@andrew.cmu.edu>]

I'm trying to put a pattern on top of text with :PATXOR so that the 
text is distorted.  The problem is that the text can be seen before 
the pattern covers it.  I thought DRAW-PICTURE would display a 
bitmap of the covered text, but it just replays a series of
QuickDraw commands.
Does anyone have any suggestions on how to convert QuickDraw commands 
into bitmap information that I could put on the screen?

Thanks,
Mike Matessa