Macintosh
Sample Code Notes
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                                                  Developer Technical Support

#16:	OffSample

Written by:	Mark Bennett

Versions:			1.00						April 1989

Components:			OffSample.p					April 1, 1989
					OffSample.r					April 1, 1989
					OffSample.h					April 1, 1989
					POffSample.make				April 1, 1989

Required:			Offscreen.p					April 1, 1989
					Offscreen.incl.p			April 1, 1989
					UFailure.p					November 1, 1988
					UFailure.incl.p				November 1, 1988
					UFailure.a					November 1, 1988
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OffSample demonstrates the usage of the Offscreen unit.  It shows 
how to use off-screen bitmaps and pixel maps to produce flicker-
free updating with a minimum of code restructuring.  OffSample 
attempts to reduce the amount of ÒknowledgeÓ it has of the off-
screen structure so as to minimize its dependence upon that unit.

OffSample emphasizes using the Offscreen unit; it is not intended 
to be viewed as a complete application on which to base some 
larger effort.  Instead, its method of using off-screen bitmaps 
and pixel maps should be studied and adapted to other applications 
that desire features like flicker-free updating.
