Re: What units are in effect when drawing?
Re: What units are in effect when drawing?
- Subject: Re: What units are in effect when drawing?
- From: Chris Hanson <email@hidden>
- Date: Sat, 5 Apr 2003 13:58:02 -0600
At 7:05 PM +0300 4/5/03, Janek Priimann wrote:
> What are the default units when drawing in a custom view? Picas?
Points? mm?
The default units are points.
But because all the macintosh computers use 72dpi resolution
and 1 inch equals to 72 points then 1 point = 1 pixel.
However, you shouldn't necessarily assume this.
IBM has been shipping a 24-inch 200dpi LCD display for a year now,
and ViewSonic is OEMing it. I suspect its price will come down to
the level of the original Cinema Display soon. Other vendors are
also increasing display density rapidly.
I have no idea what Apple's future plans are for CoreGraphics (and
couldn't say if I did know), but I suspect at some point in the next
few years we'll see true resolution independence in the display
architecture. I'd rather my code Just Work when that comes about.
Also, you can't assume one point is equal to one pixel when your view
is printing. After all, on a 1200dpi printer, a one by one point dot
is 16.7 by 16.7 "pixels"...
-- Chris
--
Chris Hanson, bDistributed.com, Inc. | Email: email@hidden
Custom Application Development | Phone: +1-847-372-3955
http://bdistributed.com/ | Fax: +1-847-589-3738
http://bdistributed.com/Articles/ | Personal Email: email@hidden
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