[whatwg] createImageData

[Jonas Sicking]

Vladimir Vukicevic wrote:
> 
> Sorry it took me a bit to respond here... so, ok, based on the 
> discussion, I'd suggest:
> 
> - user-created ImageData-like objects should be supported, e.g. with 
> language such as:

Do note that dealing with user-created objects isn't trivial. You have 
to be prepared for dealing with the user-created object changing the 
whole world under you during a callback, this includes things like doing 
any modification to the canvas object itself, but also things like 
script navigating away and then causing a GC to tear down the world 
around you.

This is usually not very hard to deal with, as long as you are not deep 
inside a long callstack when calling out to content. This is because you 
have to ensure that the whole callstack is ok with the world changing 
around it.

/ Jonas