- From: <steve@steveclaflin.com>
- Date: Tue, 10 Feb 2015 14:09:39 -0600
- To: Eric Portis <lists@ericportis.com>
- Cc: public-respimg@w3.org
On 2015-02-09 14:31, Eric Portis wrote: > A bit of “view source” shows a boatload of picturefill, a > smattering of picture, mostly x descriptors, and nary a w descriptor > in sight. The [8] numbers [9] indicate [10] that this is a > representative sample; it seems that the Hi-DPI and art direction use > cases are easier for folks to wrap their minds around than > resolution-switching. Which brings us to: > Good to see that subsequent tweets do show the use of w! Ever since my first exposure to this group, I've been asking myself the question "Why the emphasis on x instead of w?" Unless I've missed a page somewhere, the use cases I've seen are somewhat generic - they list a set of categories a developer choice might fall into, but not an actual task-at-hand (I'm looking at http://usecases.responsiveimages.org/#resolution-based-selection). For example, I can think of a specific image situation where the x descriptor is better than w: images that don't get resized via CSS (specifically that they wouldn't be given a CSS width in percent, or aren't constrained by max-width in a container with a percentage width). This would include things like buttons or inline icons that one would expect to scale with the font size. If I have a big company logo that is supposed to go across the entire top of the page (or across the full width of a floating div, or an image using half of a div's width, etc.), I don't see how an x descriptor alone would be useful. w could be, and w combined with x would certainly be useful. So, I think there should be more emphasis on w descriptors, both in pages using responsive images and in browser development of the responsive images feature set. Also, along the lines of what someone else has suggested, I would propose that the flowchart be broken up into several separate charts based on more specific use cases.
Received on Tuesday, 10 February 2015 20:00:13 UTC