Re: [css3-values] new editor's draft (and [css3-box])

On Jan 19, 2009, at 3:55 PM, Robert O'Callahan wrote:

> On Tue, Jan 20, 2009 at 9:32 AM, Alex Mogilevsky <alexmog@microsoft.com 
> > wrote:
> However if the site is a photographer's portfolio, the artist will  
> likely want his or her pictures to be rendered at optimal resolution  
> (pixel-to-pixel), and they probably have the originals in enormous  
> resolution so they can provide higher resolution images for high  
> resolution displays (and they can know when to pick high resolution  
> originals, e.g. from media query).
>
> If they're using media queries to pick the image file, then why do  
> they need a device pixel unit? They should just specify a fixed px  
> size for the image in the page, set background-size:100%, and use  
> media queries to pick a 1x, 2x, 3x etc resolution file.
>
> We probably should have a media query value that describes the  
> device-pixel-to-CSS-pixel ratio being used by the user agent, to  
> make that approach work optimally. I think that would be a much  
> better solution for this use case.
>

This is in fact implemented by WebKit.

device-pixel-ratio

dave
(hyatt@apple.com)