I often need to insert a screenshot into a html mail in iceweasel. Scrot can only save to a file, not to clipboard. I tried some commandline tools like xclip, but without success. The only working way was to open the file made by scrot with gthumb and let ghtumb copy it to clipboard. But that's very inconvenient.
xfce4-screenshooter also cannot copy to clipboard, offers me only to upload it to zimage, save it to file, or open it with application.
Is there an easy way to make screenshots to clipboard without overloaded tools like gnome-screenshot?