- From: Glenn Adams via GitHub <sysbot+gh@w3.org>
- Date: Fri, 09 Sep 2016 00:02:19 +0000
- To: public-tt@w3.org
skynavga has just created a new issue for https://github.com/w3c/ttml2: == Add support for rounded borders == The use of rounded borders (or backgrounds) on caption/subtitle regions is becoming prominent. With the addition of ``tts:border`` in TTML2, we should also add support for rounded borders basing this support on features defined by CSS Backgrounds and Border Level 3 [1]. Note that this feature may also be used to indicate the use of rounding with background coloration applied to regions or content elements, even when no border is drawn (since the default clip region for the _background painting area_ is the border region). [1] https://drafts.csswg.org/css-backgrounds-3/#the-border-radius The proposal is to add an optional ``<border-radii>`` component to the value syntax for ``tts:border`` as follows: <pre> tts:border : [ <border-thickness> || <border-style> || <border-color> || <border-radii> ] <border-radii> : 'radii(' <length> ( ',' <length> )? ')' </pre> where, if two lengths are specified, then the first length corresponds to the quarter ellipse radius for the inline progression dimension (for content) or horizontal direction (for regions), while the second length, if present, corresponds to the quarter ellipse radius for the block progression dimension (for content) or vertical direction (for regions), or, if only one length is present, then it is interpreted as if two lengths were specified with the same value. If a percentage value is used for a ``<length>``, then it is resolved with respect to the appropriate dimension of the border box's extent. Please view or discuss this issue at https://github.com/w3c/ttml2/issues/176 using your GitHub account
Received on Friday, 9 September 2016 00:02:27 UTC