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Re: a vote for rotation

From: Clive Bruton <clive@typonaut.demon.co.uk>
Date: Fri, 28 Nov 97 13:33:54 +0000
To: <www-style@w3.org>
Message-ID: <1331398318-31297054@[194.205.134.101]>
Chris Lilley wrote at 27/11/97 8:19 pm

>Hey, great! "90 degree rotations of downloadable fonts acceptable, says
>Clive Bruton" ;-)

Yes sure, as long as they're encrypted, expire 3ns after they're 
downloaded, the font vendor gave permission, the font "broadcaster" paid 
for the priviledge and (some other stuff I forgot)... CSSvX supports 
rotation of type. :-)

>
>> Chris made a few points about some platforms not dealing with rotated
>> text too well, this is probably true. However any that handles TrueType
>
>It was TrueType I was thinking of, because the hinting mechanisms basically
>assume no rotation. Alas, my knowledge of TT hinting falls off when the
>actual assembler-like codes are involved so I don't know if it is actually
>possible to treat vertical  hints as horizontal hints ( a quick look at the
>spec [1] seems to indicate that this is so)

The argument that's always been made to me about vectors vs bitmap fonts 
is that the vectors can be rotated (in any increment) and maintain their 
shape due to their structure and their hinting. Maybe I'll check on that 
elsewhere...

>And of course for bitmapped font formats, if rotation is restricted to
>90degree increments, creating rotated 'virtual' fonts is computationally
>trivial.

Absolutely, because of the nature of pixels this is probably the only 
desirable way to do it anyway (but I guess that's just me trying to 
enforce "good taste" on someone else who wants free rotation), until we 
all have 200-300dpi antialiased screens.

>
>> But some provision for an "alt" tag should be made, just as for browsers
>> that can't (or won't) handle images.
>
>In the context of CSS, if a property is unknown the entire
>rule is ignored so authors can provide two rules, one for the rotated case
>and one which will be used if rotation is not supported.

Sounds good to me, as long as the authors allow for the change.


-- Clive
Received on Friday, 28 November 1997 08:37:30 GMT

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