Le 15/05/12 09:28, Ian Hickson a écrit :

    <img src="[email protected]" alt=""
         src-template="face-%w-%h@%r.jpeg"
         src-versions="600x200x1 600x200x2 200x200x1">

[snip]

    <img src="[email protected]" alt=""
         srcset="[email protected] 600w 200h 1x,
                 [email protected] 600w 200h 2x,
                 face-icon.png       200w 200h">

Three comments:

1. from the point of view of an editor (I mean a wysiwyg application),
   this is far too complex and painful. With my BlueGriffon hat on,
   please trust me on that. Where is the harmony, the consistency with
   the multi-source video and audio elements? Why should browsers and
   editing tools have to deal with a different mechanism?

2. the %w and %h syntax above will clash with the necessary escaping of
   non-URL compliant characters and I think this is a _very_ bad idea.
   All examples I saw include filenames only but these are really URIs !

3. for the same reason, because some filesystems allow whitespaces and
   commas and more in filenames, the latter seems to me dangerous and
   certainly a bad idea. I know whitespaces in URIs will be encoded but
   decoding srcset will then imply parsing it to extract URIs before
   unescaping or whitespaces will become a problem. That's really too
   expensive.

It's much more subjective but I have an extra comment: the proposed
srcset attribute is absolutely ugly. I think the srcset approach is
wrong.

</Daniel>
--
W3C CSS Working Group, Co-chair

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