[whatwg] High-density canvases
ian at hixie.ch
Tue Sep 10 13:13:02 PDT 2013
On Wed, 11 Sep 2013, Dean Jackson wrote:
> On 11 Sep 2013, at 5:32 am, Ian Hickson <ian at hixie.ch> wrote:
> > On Wed, 11 Sep 2013, Dean Jackson wrote:
> >> On 11 Sep 2013, at 12:14 am, Stephen White <senorblanco at chromium.org>
> >> wrote:
> >>> now that some browsers are including browser zoom (page zoom) in
> >>> window.devicePixelRatio
> >> Ouch. Who is doing this and why?
> > Why ouch?
> Because we’ve always operated under the assumption that devicePixelRatio
> is the mapping from CSS px to device pixels at 1:1 scale/zoom, and that
> it is constant for a particular display. The only change content would
> see is if the window is dragged to/from a high resolution screen.
> There are other ways to query the page zoom.
That seems broken... why would you want to hide the page zoom?
> I fear this will break existing content. I don’t think we’d ever want to
> change the behaviour.
I guess we'll just have to treat devicePixelRatio as legacy and introduce
a new value that's the real device:pixel ratio, then.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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