Create reusable image fetching logic for other standards #4474

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1. domenic

   added

   topic: img

   on Mar 29, 2019
2. annevk commented on Feb 4, 2020

   

   annevk

   on Feb 4, 2020

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   This is also needed for CSS background-image et al. All fetching of images should share the same pipeline.

   👍React with 👍1Reacted by jonjohnjohnson
3. annevk

   added

   topic: fetch

   on Feb 4, 2020
4. annevk commented on Oct 26, 2020

   

   annevk

   on Oct 26, 2020

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   See also w3c/csswg-drafts#5173 and various issues linked from there.
5. zcorpan commented on Oct 29, 2020

   

   zcorpan

   on Oct 29, 2020

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   This was discussed a few days ago in the WHATWG TPAC breakout session. Minutes at https://www.w3.org/2020/10/26-whatwg-minutes.html#fetching (cc @emilio )

   zcorpan: old issue. Browsers are probably reusing image loading logic for many things, but HTML Standard only specifies special logic for <img>. This makes adding new image-loading features, e.g. to CSS, hard. No work in the last 7 years to my knowledge. Any progress on solving this, or new information on how to solve?

   emilio: interop issues with CSS images having different caching policies. But usually all browsers have a centralized image loader. Shared caches, and so on.

   zcorpan: also an issue with the image cache. Probably doesn't match implementations.

   emilio: changed Gecko to match spec a bit better for image cache. This can also affect preloading.

   Domenic: interest from chromium to work on memory cache, image cache..

   emilio: arch in gecko is different from chromium. if you have an uncachable image loaded from a stylesheet, (something something)

   Domenic: interop issue is important. emilio you seem to have knowledge about this

   emilio: happy to work on this

   <annevk> And with EXIF there’s decoding considerations too that need centralization (And I guess in general we want uniform image decoders across features that consume images.)

   Domenic: I'll take the action item to start the discussion to collate the concrete interop issues.