[whatwg] "canvas" tag and animations ?

Charles Iliya Krempeaux supercanadian at gmail.com
Mon Jun 13 18:22:13 PDT 2005


On 6/13/05, Sjoerd Visscher <sjoerd at w3future.com> wrote:
> Charles Iliya Krempeaux wrote:
> > IMO, it would be better to a have solution to this built into the API.
> >  Maybe with some kind of "drawing transaction".
> >
> > (A "draw transaction" is a little higher level than "double
> > buffering", and allows you use other systems for this, other than
> > "double buffering".  And would probably be safer, considering much of
> > JavaScript is done via events.)
> This isn't needed. Just like in normal HTML a drawing transaction is
> automatically started when the javascript code starts, and finished when
> the javascript code is done. And this is how it is implemented in
> Firefox (don't know about Safari).
> Maybe the spec should describe this somewhere? Not specifically for
> canvas, but for script in general: Changes on the DOM must be performed
> instantly, and values like offsetWidth etc. must be recalculated, but
> only visible when the script is done.

Yes, please do :-)  (It wasn't obvious to me.)

See ya

     Charles Iliya Krempeaux, B.Sc.

     charles @ reptile.ca
     supercanadian @ gmail.com

     developer weblog: http://ChangeLog.ca/
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