Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!rutgers!cbmvax!ken
From: ken@cbmvax.commodore.com (Ken Farinsky - CATS)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Sharing layers.library with intuition
Message-ID: <17731@cbmvax.commodore.com>
Date: 17 Jan 91 17:16:43 GMT
References: <1991Jan11.001055.2055@mintaka.lcs.mit.edu> <17398@cbmvax.commodore.com> <1991Jan16.162030.7783@murdoch.acc.Virginia.EDU> <17689@cbmvax.commodore.com>
Reply-To: ken@cbmvax.commodore.com (Ken Farinsky - CATS)
Organization: Commodore, West Chester, PA
Lines: 21

In article <17689@cbmvax.commodore.com> peter@cbmvax.commodore.com (Peter Cherna) writes:
>In article <1991Jan16.162030.7783@murdoch.acc.Virginia.EDU> tmb@davinci.acc.Virginia.EDU (Thomas M. Breeden) writes:
>>Is it in the same tricky territory to attempt to add a clipping
>>rectangle within an Intuition window?
>
>No.  It's actually fairly easy.  See layers.library/InstallClipRegion().
>Here's a cheap simple example, with no guarantees :-)
>    
>   if ( myregion = NewRegion() )
 [ . . . ]
>   OrRectRegion(myregion, &myrect);

Be sure that you check the return codes of these routines!  They can
run out of memory and fail.  Note that the RKM example code (in the
layers chapter of Libs&Devs) does not properly check the returns (we
all make mistakes.  ;-)
-- 
--
Ken Farinsky - CATS - (215) 431-9421 - Commodore Business Machines
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