W3C home > Mailing lists > Public > public-respimg@w3.org > February 2013

Re: CfC: to publish "The srcset attribute" specification as a First Public Working Draft (FPWD)

From: Marcos Caceres <w3c@marcosc.com>
Date: Wed, 27 Feb 2013 12:11:13 +0000
To: "public-respimg@w3.org" <public-respimg@w3.org>
Cc: "Nathanael D. Jones" <nathanael.jones@gmail.com>, Edward O'Connor <eoconnor@apple.com>, Yoav Weiss <yoav@yoav.ws>, Mathew Marquis <mat@matmarquis.com>, Fred Andrews <fredandw@live.com>, Paul Cotton <Paul.Cotton@microsoft.com>
Message-ID: <A0C8B7150D144478B1676CF817254705@marcosc.com>
Agree. Please everyone refrain from having the discussion here. Some of the people CC'd cannot discuss the matter here for IPR reasons.    

--  
Marcos Caceres
http://datadriven.com.au


On Wednesday, 27 February 2013 at 12:04, Paul Cotton wrote:

> Would it be possible to send this to public-html@w3.org (mailto:public-html@w3.org) for discussion there by the HTML WG?
>  
> /paulc
>  
> Paul Cotton, Microsoft Canada
> 17 Eleanor Drive, Ottawa, Ontario K2E 6A3
> Tel: (425) 705-9596 Fax: (425) 936-7329
>  
> From: Nathanael D. Jones [mailto:nathanael.jones@gmail.com]  
> Sent: Wednesday, February 27, 2013 6:24 AM
> To: Edward O'Connor; Yoav Weiss; Marcos Caceres; Paul Cotton; Mathew Marquis
> Cc: public-respimg@w3.org (mailto:public-respimg@w3.org); Fred Andrews
> Subject: Re: CfC: to publish "The srcset attribute" specification as a First Public Working Draft (FPWD)  
>  
> A Unified solution to <picture>
>  
>  
> Perhaps there's a very simple way to support both pre- and post-layout queries with <picture>, and sacrifice neither functionality or performance.
>  
>  
> If sources specify the dimensions of the images (and more than one image matches the media queries), we delay image fetching until CSS is downloaded; otherwise fetching can occur immediately.
>  
>  
> We can then apply sizing constraints to further filter the list of images (media queries are still king, but if more than 1 image 'matches', we use size constraints).
>  
>  
> I've written up the details here: https://gist.github.com/nathanaeljones/5047077
>  
>  
> ---  
>  
>  
> I also propose the expansion of the Use Cases and Requirements document to include:  
>  
>  
> 11 The solution SHOULD offer an method to leverage breakpoints defined in CSS.
> 12. The solution SHOULD support a simplified syntax to support primary use case 3.1 (preferably a list of images and their dimensions), in order to reach users of content management systems and those without detailed knowledge of CSS media queries.
>  
> This allows complexity to be moved from HTML to CSS, and removes the need for high-volume repetition of breakpoint logic.
>  
>  
> Authors who wish to use responsive web design will be able to use a CSS framework or snippet and matching CSS classes on <picture> to achieve responsive images - a path much less intimidating than CSS media queries, and much easier for CMSes and authoring tools to support (how would a GUI for media queries be designed)?
>  
>  
> I fear for adoption of <picture> unless we can make it CMS and 'non-coder' friendly.  
>  
>  
> Thanks,
> Nathanael  
>  
> On Wed, Feb 6, 2013 at 7:31 PM, Edward O'Connor <eoconnor@apple.com (mailto:eoconnor@apple.com)> wrote:
> Hi Fred,
>  
> You wrote:
>  
> > If the 'picture' and 'srcset' proposals are limited to[…] using only
> > information available pre-layout[…] it may not be proper for ambiguity  
> > in the RICG proposals to delay other development work in an area that
> > needs urgent attention.  
>  
> I'd like to clarify two things:
>  
> 1) The srcset="" specification is not a proposal of the Responsive
> Images Community Group, although feedback from the members of that
> group have certainly contributed to the feature's design.
>  
> 2) By working on the srcset="" nor <picture> specifications within this
> working group, those working on them are not delaying other work that
> you or other WG members may want to take on. In particular, if you
> would like to work on a proposal for an adaptive images feature that
> relies on layout information, please do so! I would be happy to
> review a draft in that area.  
>  
> > It is not immediately obvious to me how the specialized 'picture' and
> > 'srcset' solutions proposed by the RICG could fit alongside more
> > general solutions and it is likely that more general solution would
> > subsume the current proposals.  
>  
> I think we can address such confusion within these drafts when and if a
> more general solution is produced.
>  
>  
> Thanks,
> Ted  
>  
Received on Wednesday, 27 February 2013 12:11:48 UTC

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