Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!mips!apple!keith
From: keith@Apple.COM (Keith Rollin)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Correct way to set pixels?
Message-ID: <52440@apple.Apple.COM>
Date: 4 May 91 02:45:12 GMT
References: <5865@ns-mx.uiowa.edu> <52427@apple.Apple.COM> <52431@apple.Apple.COM>
Distribution: na
Organization: Apple Computer Inc., Cupertino, CA
Lines: 33

In article <52431@apple.Apple.COM> nerm@Apple.COM (Dean Yu) writes:
>In article <52427@apple.Apple.COM> stevec@Apple.COM (Steve Christensen) writes:
>>wolf@piquet.cipl.uiowa.edu (Michael J. Wolf) writes:
>>>What is the proper and endorsed manner to set and clear pixels in a window?
>>>
>>>I would like to be able to do somethig like a fatbits editor.
>>
>>Well, certainly one way of doing it is something like this:
>>
>>	ForeColor(pixelOn ? BlackColor : WhiteColor);
>>	MoveTo(h,v);
>>	Line(1,0);
>>
>>This will draw a 1-pixel-long line.  There's no QuickDraw routine to touch a
>>single pixel...
>>
>
>  Actually, Line(0,0) will draw a single pixel...
>

SetCPixel() will touch a single pixel if you are running under Color
QuickDraw and dealing with a color port. If that's not the case, then
you can fill in a pixel with a single QuickDraw call:

	r.top = v; r.left = h; r.bottom = v+1; r.right = h+1;
	PaintRect(&r);

-- 
------------------------------------------------------------------------------
Keith Rollin  ---  Apple Computer, Inc. 
INTERNET: keith@apple.com
    UUCP: {decwrl, hoptoad, nsc, sun, amdahl}!apple!keith
"But where the senses fail us, reason must step in."  - Galileo