[webkit-dev] Canvas backing resolution

Kenneth Rohde Christiansen kenneth.christiansen at gmail.com
Fri Mar 4 12:02:51 PST 2011

Hi Simon,

I guess you could use the media query listener defined in

We support that on trunk now. This of course means that we will need
to reevaluate the CSS when a pinch zoom ends, which we might be doing
already given media queries such as @media all and (min-width: 200px).


On Fri, Mar 4, 2011 at 8:47 PM, Simon Fraser <simon.fraser at apple.com> wrote:
> On Mar 4, 2011, at 11:24 AM, Kenneth Rohde Christiansen wrote:
>> Hey Oliver!
>> If you are saying that device-pixel-ratio should include the user
>> scaling, then I can push that for Qt, but I would really like seeing
>> it supported by iOS as well for compatibility reasons. If you create a
>> bug for that, please cc me.
> There's a problem with that, which is that the author can assume (possibly erroneously) that device-pixel-ratio doesn't change for the life of the page. However, the zoom level can change often, and there's no notification that the author can register for that will tell them when the zoom level changes, and thus when they'll need to redraw their canvas contents.
> Simon

Kenneth Rohde Christiansen
Senior Engineer
Application and Service Frameworks, Nokia Danmark A/S
Phone  +45 4093 0598 / E-mail kenneth.christiansen at gmail.com

http://codeposts.blogspot.com ﹆﹆﹆

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