On Sun, May 31, 2015 at 4:54 AM, Sam Weinig <wei...@apple.com> wrote:
> > Hi Yoav, > > Sorry, but I’m afraid I’m still not really getting it. Can you get even > more concrete? Perhaps provide some a sample page that would need this > kind of functionality and go through what Content-DPR values would be used? > > Sure. Let's take this very simple sample site <http://jsbin.com/rofewawuyo/1/edit>. If you wanted to optimize the image there with Client-Hints, you'd need some way to tell the browser that it has been modified, and that even though you provided it with a 400x400 pixel image, it should display it over a 200x200 CSS pixel box. A "Content-DPR" header value of 2 would enable the browser to know that the server has reacted to the DPR hint request header, and scale the CSS pixels it displays the image on accordingly.
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