[whatwg] Why does CanvasRenderingContext2D.drawImage not draw a video's poster?
Charles Pritchard
chuck at jumis.com
Wed Jul 18 21:34:08 PDT 2012
What do we do when the document has already loaded and we've added a new video element? Also, the concern was about elements that do not have a poster attribute defined: the section you mentioned would not be relevant.
I'm all for inclusiveness: I need to meet obligations of programmatic availability.
-Charles
On Jul 18, 2012, at 9:14 PM, Mark Callow <callow_mark at hicorp.co.jp> wrote:
> On 18/07/2012 13:57, Charles Pritchard wrote:
>
>> We don't have events based on poster, so we don't know whether or not it's been loaded.
>
> On 19/07/2012 09:46, Charles Pritchard wrote:
>> I'm not opposed to the idea, but I'm failing to see the benefit.
>> Still, if there's going to be one, we're going to need an
>> onposterloaded event.
>
> I don't understand these concerns. Step 4 of the algorithm to be run
> when the video element is created or the @poster attribute is set,
> changed or removed says:
>
> Fetch
> <http://www.whatwg.org/specs/web-apps/current-work/multipage/fetching-resources.html#fetch>
> the resulting absolute URL
> <http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#absolute-url>,
> from the element's |Document
> <http://www.whatwg.org/specs/web-apps/current-work/multipage/dom.html#document>|'s
> origin
> <http://www.whatwg.org/specs/web-apps/current-work/multipage/origin-0.html#origin>.
> This must delay the load event
> <http://www.whatwg.org/specs/web-apps/current-work/multipage/the-end.html#delay-the-load-event>
> of the element's document.
>
> So once the documented is loaded, the poster, if there is one, will be
> available.
>
> Regards
>
> -Mark
>
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