[whatwg] I believe source rectangles for HTML5 Canvas drawImage are specified incorrectly
ian at hixie.ch
Wed Dec 12 10:16:20 PST 2012
On Wed, 12 Dec 2012, Rik Cabanier wrote:
> What would be the next step? Should we define a new version of drawImage
> with the extra parameter?
At the WHATWG, the process, insofar as there is one, is that the spec's
editor (in this case me) goes through the e-mails on a topic and edits the
spec based on the feedback and based on how much vendor buy-in an issue has.
On this particular topic, I've only heard interest in implementing this
from one vendor, Google, so adding support to the spec at this point is
probably premature. If other vendors are interested in implementing
something for this (a feature to make drawImage scale subsets with
clamping at the source rectangle rather than the original image), I
encourage them to indicate this on this thread.
> If so, we probably want the description of the existing drawImage call
> to change so it leaves the resampling issue undefined unless WebKit is
> OK with changing their current behavior.
Leaving the spec undefined is not acceptable. :-)
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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