[whatwg] Built-in image sprite support in HTML5

Aryeh Gregor Simetrical+w3c at gmail.com
Sun May 23 05:04:07 PDT 2010

On Fri, May 21, 2010 at 8:07 PM, Silvia Pfeiffer
<silviapfeiffer1 at gmail.com> wrote:
> However, what exactly happens with a media fragment URI like
> http://example.com/picture.png#xywh=160,120,320,240 is not fully
> specified in the Media Fragment URI spec.
> One thought was to just highlight the area that is specified - similar
> to a lightbox - where the other areas in the image/video are darkened.
> That follows the idea of fragments being a focus region.
> Another thought is to zoom into that area and decode, but not display
> the others.

The first idea doesn't make any sense to me as an author.  It seems
like it would be vastly less useful than the second.  It's just a
stylistic effect, which you don't even have any control over -- and
authors don't like being unable to control style precisely.  What I'd
expect is the second thing: that URL should behave exactly like a
manually-cropped version of picture.png, so you don't have to use
positioning hacks or serve a separate cropped file.  This would be
useful for spriting -- although resource packages, or another HTTP
pipelining substitute, sounds like a still better idea.

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