[whatwg] Wish: Restrict Image Size on Upload

[what at keepthebyte.ch]

It would be useful to be able to define a bounding box of allowed
picture width and height when uploading picture(s). The UA would need to
check if the selected picture(s) is/are inside the allowed range (min -
max width & height). With picture I generally mean the internet
widespread formats (png, gif, jpg).

Screenshot of an authoring tool:

http://www.keepthebyte.ch/examples/upload-policy.gif

Decline if it already has been discussed.

Keep the byte.

Cedric