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From: phils@chaos.cs.brandeis.edu (Phil Shapiro)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Detecting Color Depth
Message-ID: <PHILS.90Nov7104254@chaos.cs.brandeis.edu>
Date: 7 Nov 90 15:42:54 GMT
References: <1990Nov6.231358.18153@Neon.Stanford.EDU>
Sender: @chaos.cs.brandeis.edu
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Organization: Symantec Corp.
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In-Reply-To: commons@Sunburn.Stanford.EDU's message of 6 Nov 90 23:13:58 GMT

In article <1990Nov6.231358.18153@Neon.Stanford.EDU> commons@Sunburn.Stanford.EDU (Peter Commons) writes: 
   Given you know whether a Mac has color Quickdraw or not, how do you
   determine screen depth?

I use:

#define ScreenDepth(gdh)	((**((**gdh).gdPMap)).pixelSize)
#define MaxColors(gdh)		(1L<<ScreenDepth(gdh))

where gdh is a GDHandle (graphic device handle).

	-phil
--
   Phil Shapiro                           Technical Support Analyst
   Language Products Group                     Symantec Corporation
		Internet: phils@chaos.cs.brandeis.edu