W3C home > Mailing lists > Public > public-tt@w3.org > April 2012

Re: Padding on tt:p and tt:span elements

From: Glenn Adams <glenn@skynav.com>
Date: Wed, 25 Apr 2012 10:04:28 -0600
Message-ID: <CACQ=j+dY6OxOHmnJ7mB9qrboPUbEYMhOPCp0xXr_12CCn4c0bw@mail.gmail.com>
To: John Birch <John.Birch@screensystems.tv>
Cc: "tai@irt.de" <tai@irt.de>, "public-tt@w3.org" <public-tt@w3.org>
On Wed, Apr 25, 2012 at 9:33 AM, John Birch <John.Birch@screensystems.tv>wrote:

>  You hit the nail on the head. Font size at authoring time is only true
> if font exists at browser... Otherwise substitution means all bets are off.
>

not quite; you can always overestimate the size which permits containment
without overflow


> Best regards,
> John
>
>
>  *From*: Glenn Adams [mailto:glenn@skynav.com]
> *Sent*: Wednesday, April 25, 2012 04:00 PM
> *To*: John Birch
> *Cc*: Andreas Tai <tai@irt.de>; public-tt <public-tt@w3.org>
> *Subject*: Re: Padding on tt:p and tt:span elements
>
>
> On Wed, Apr 25, 2012 at 5:22 AM, John Birch <John.Birch@screensystems.tv>wrote:
>
>>  In TTML as I understand it(as a result of derivation from xsl:fo?),
>> there is no possible mechanism that can *set* the region size as a
>> result of a calculation of the *rendered* text size on the display. In
>> contrast to broadcast practises, in TTML the text is fitted inside a
>> predefined region (or overflows / clips), rather than the region (growing)
>> fitting the text.
>>
>
>  it can, if the size can be determined at authoring time; but that will
> depend on font usage; so you are correct that if the font size is unknown,
> then you may have to overestimate the size, e.g., by using em or c length
> units
>
> *John Birch | Screen Systems | Strategic Partneships Manager
> *
> Main Line : +44 1473 831700 | Ext : 270 | Direct Dial : +44 1473 834532
> Mobile : +44 7919 558380 | Fax : +44 1473 830078
> John.Birch@screensystems.tv | www.screensystems.tv |
> http://twitter.com/ScreenSubtitles****
>
> *SysMedia - Now part of Screen* ......a fusion of expertise, a
> combination of World Leading Products
>
> *LAUNCHING SOON! *A new single website incorporating all Screen and
> Sysmedia products.
>
> *Visit us at
> Broadcast Asia, Block 4F3-01, UK Pavillion, Suntec Singapore, 19th - 22nd
> June 2012 *
>
> *P** Before printing, think about the environment*
>
>
>
>
>  This message may contain confidential and/or privileged information. If
> you are not the intended recipient you must not use, copy, disclose or take
> any action based on this message or any information herein. If you have
> received this message in error, please advise the sender immediately by
> reply e-mail and delete this message. Thank you for your cooperation.
> Screen Subtitling Systems Ltd. Registered in England No. 2596832.
> Registered Office: The Old Rectory, Claydon Church Lane, Claydon, Ipswich,
> Suffolk, IP6 0EQ
>    ­­
>
Received on Wednesday, 25 April 2012 16:05:22 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Wednesday, 25 April 2012 16:05:23 GMT