On Nov 20, 2010, at 7:46 AM, Ojan Vafai wrote: > On Fri, Nov 19, 2010 at 9:21 PM, Robert O'Callahan <rob...@ocallahan.org> > wrote: > Most of the use cases for script access to the exact device pixel ratio that > I've heard boil down to "interfere with the user's ability to zoom", which is > why I haven't been eager to make it easier. > > To be clear, chrome.tabs.getZoomPercentage is a Chrome extension API. Having > extensions that can mess with zoom seems like a legit use-case. But I agree, > I can't think of good use-cases for the general web being able to.
The only one I can think of is sizing the canvas backing store to get a sharp image on high-resolution displays, and possibly swapping in different image assets from JS. Simon
