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From: jwhitnell@cup.portal.com (Jerry D Whitnell)
Newsgroups: comp.sys.mac.programmer
Subject: Re: PICT rowBytes
Message-ID: <41522@cup.portal.com>
Date: 22 Apr 91 00:11:56 GMT
References: <327@nic.cerf.net> <1991Apr20.203304.3973@agate.berkeley.edu>
Distribution: usa
Organization: The Portal System (TM)
Lines: 16

Ben Haller (deadman@garnet.berkeley.edu) writes...
|In article <327@nic.cerf.net> moreland@nic.cerf.net (John Moreland) writes:
|>rowBytes |= 0x8000; /* HIGH-BIT LIT MEANS "PIXMAP" */
|>rowBytes &= 0x7FFF; /* UNDO THE HIGH-BIT SO WE CAN USE ROWBYTES "NORMALLY" */
|
|  You should do &= with 0x1FFF, since the three high bits are reserved by
|Apple.  Besides this, you're fine.

Actually, it is now &= 0x3fff.  Apple unreserved the 0x2000 bit with
32-bit QuickDraw.  
|
|-Ben Haller (deadman@garnet.berkeley.edu)
|"Shock the monkey to life..." - Peter Gabriel

Jerry Whitnell
SuperMac Technology