Changing a grafPort's portBits?

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1 total messages Started by Anthony D. CXO1-2/N23 522-2072 Thu, 30 Oct 1986 21:38

#7813

Author: Anthony D. CXO1-2/N23 522-2072
Date: Thu, 30 Oct 1986 21:38

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Does anyone know how to change the size of a grafPort's portBits
bitmap?  I am manipulating a 512x512 pixel image and need to increase
the size of portBits^.baseAddr from 314(?)x512 to 512x512 (also
changing portBits^.bounds to (0, 0, 512, 512), but that should be
easy: use SetRect).

There are a few of problems I'm having:

	(1) Whenever I use portBits^.baseAddr, I get an odd address
	    exception.  I'm using Lightspeed Pascal.

	(2) I don't know whether portBits^.baseAddr points to a
	    relocatable or non-relocatable block.  Do I use
	    RestoreHandle to get a handle from it, and then use
	    SetHandleSize, or do I use SetPtrSize?

	(3) When I create a brand new bitmap and assign it to portBits,
	    the  window toolbox routines get very confused
	    (i.e. the window changes to a different size,
	    no mouse-down events in the window work, etc.)
	   
Any help would be greatly appreciated.

Anthony

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Anthony Discolo
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