W3C home > Mailing lists > Public > www-style@w3.org > July 1997

Re: font sizes in ems

From: Chris Lilley <Chris.Lilley@sophia.inria.fr>
Date: Mon, 21 Jul 1997 21:58:48 +0200 (MET)
Message-Id: <9707212158.ZM20456@grommit.inria.fr>
To: David Perrell <davidp@earthlink.net>, www-style <www-style@w3.org>, Todd Fahrner <fahrner@pobox.com>
On Jul 18,  4:34pm, David Perrell wrote:

>   <http://www.hpaa.com/css1/emsizing.html>
>
> is a demonstration page with all measurements in ems, including
> margins, indent, line-height, and font-size. There is a link to a
> screen dump from my system.
>
> Theoretically, this should be equally legible on any machine, including
> a 72ppi Mac. Comments and screen dumps would be greatly appreciated.

In NSN4.01p6 for SGI, changing the default size in preferences (anywhere
between 8 and 32 pt) had no observable effect. Book Antiqua was not
present, Palatino was (in BDF format at 100dpi and with these sizes

-adobe-palatino-medium-r-normal--11-80-100-100-p-57-iso8859-1
-adobe-palatino-medium-r-normal--14-100-100-100-p-79-iso8859-1
-adobe-palatino-medium-r-normal--17-120-100-100-p-89-iso8859-1
-adobe-palatino-medium-r-normal--19-140-100-100-p-101-iso8859-1
-adobe-palatino-medium-r-normal--25-180-100-100-p-133-iso8859-1
-adobe-palatino-medium-r-normal--33-240-100-100-p-176-iso8859-1
                                    ^^^---- size in centipoints
                                 ^^-------- size in pixels
it was also available in Type1 format

-adobe-palatino-medium-r-normal--0-0-0-0-p-0-iso8859-1

but was not selected due to the bitmap version being found first.

Verdana was present (an experiment, converting the TrueType into Type1).

The screen was fairly high-res and supported 24bit color; resolution
was close to the 100dpi the fonts assumed:

screen #0:
  dimensions:    1280x1024 pixels (350x280 millimeters)
  resolution:    93x93 dots per inch
  depths (5):    1, 8, 12, 15, 24

http://www.w3.org/people/chris/emsizing-nsn401p6sgi

There were some odd effects on the last two lines, depending on resizing
the last line of text would disappear.

http://www.w3.org/people/chris/emsizing-nsn401p6sgi-oops

Results in NSN4.01 for Mac were similar. Book Antiqua was not present
either, Palatino and Verdana were. Here are two dumps, with and without
smoothtype extension

http://www.w3.org/people/chris/emsizing-nsn401mac
http://www.w3.org/people/chris/emsizing-nsn401mac-st

Results with IE3.01/Mac were as others have reported ;-)


-- 
Chris Lilley, W3C                          [ http://www.w3.org/ ]
Graphics and Fonts Guy            The World Wide Web Consortium
http://www.w3.org/people/chris/              INRIA,  Projet W3C
chris@w3.org                       2004 Rt des Lucioles / BP 93
+33 (0)4 93 65 79 87       06902 Sophia Antipolis Cedex, France
Received on Monday, 21 July 1997 16:00:09 GMT

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