1135313 - Implement a per-document "list of available images" as defined in the HTML spec

Status: NEW

(Core :: Layout: Images, Video, and HTML Frames, defect)

Description

[Seth Fowler [:seth] [:s2h]]

See here:

https://html.spec.whatwg.org/multipage/embedded-content.html#list-of-available-images

Implementing this, rather than associating each image with a document in the image cache as we do now, will have the following benefits:

1. It will help us move most or all of the image cache's responsibilities to the Necko cache.
2. It will ensure that <img src='foo'> is ready synchronously if 'foo' is already on the page, which is specified behavior, and which will be impossible to ensure at the image cache level if we do #1.
3. It will make sure we avoid churning the cache when multiple documents try to use the same image, which is a problem caused by our current approach of associating each image cache entry with a document. (See bug 919113.)
4. It should make per-document image memory reporting much easier.

There is more discussion of this issue in bug 1063369.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The bug assignee didn't login in Bugzilla in the last 7 months, so the assignee is being reset.