Article View: comp.lang.postscript
Article #5775Re: Postscript Font Scaling & Reduction
From: Mark Kantrowitz
Date: Sun, 22 Nov 1992 06:02
Date: Sun, 22 Nov 1992 06:02
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In article <1992Nov19.174800.23493@adobe.com> delahunt@adobe.com (Jim DeLaHunt) writes: >The hints make adjustments based on the number of device pixel spanned by >the scaled outline, not based on the point size per se. Hinting will have >the same effect on a 10-point font on a 300 dpi device as on a 5-point font >on a 600 dpi device. More precisely, hints make adjustments based on the number of lines to the em square. A 12 point font on a 300 dpi device will have 12 points x 1 inch / 72 points x 300 dpi = 50 lines (Strictly speaking, that 72 should be 72.289, but lets not nitpick.) Most intelligent scan conversion algorithms do not work well below about 24 lines (though I've seen Bitstream's fontware work well on Helvetica at 6 lines). That's why most systems that generate screen fonts use canned bitmaps below 18 point.
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!uwm.edu!ogicse!das-news.harvard.edu!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!mkant From: mkant+@cs.cmu.edu (Mark Kantrowitz) Newsgroups: comp.lang.postscript Subject: Re: Postscript Font Scaling & Reduction Message-ID: <By3ssn.CBJ.1@cs.cmu.edu> Date: 22 Nov 92 06:02:39 GMT Article-I.D.: cs.By3ssn.CBJ.1 References: <1992Nov18.181137.25836@adobe.com> <4007@ecicrl.ocunix.on.ca> <1992Nov19.174800.23493@adobe.com> Sender: news@cs.cmu.edu (Usenet News System) Distribution: na Organization: School of Computer Science, Carnegie Mellon Lines: 15 Nntp-Posting-Host: glinda.oz.cs.cmu.edu