Inline Images from Attachment

Hi there!

I miss a function to send an image to someone (drag and drop) or a channel and display it inline, except of showing a very small preview plus a box beside that contains the name of the attachment.
As far as I understood, Inline Images are only possible when using images that are hosted under a HTTP link, inserting it like this: ![alt text](http://image.url), but what about if the image comes from my hard disk?

Is this something that is planned?

Christian