528003 - The semantics for when we use cached images and when we load new ones should be defined

Status: NEW

(Core :: Graphics: ImageLib, defect)

Description

[Jeff Muizelaar [:jrmuizel]]

The current semantics don't seem well defined and are certainly not easy to understand. We should figure out what we want the semantics to be and fix it so that we match the desired semantics.

The behaviour in other browsers is pretty varied, but we can get some examples of things we probably don't want to have:
- Opera and IE sometimes draw new images at the old sizes
- Once we have an image it shouldn't change. i.e inserting a new img element probably shouldn't change the image used in the other images.

I'm not sure the particular semantics we pick are super important but we should try and get some tests to at least ensure that our semantics don't change unknowingly.