mono/xwt — pull request #97 by luiscubal (2012-04-05 16:07:47+00:00)
Title: Implemented partial image rendering (drawImage with srcRect argument)

See issue #95

I've only implemented this on WPF and GTK+.
Since this changes an interface(adds a method to IContextBackendHandler), this means that these commits break the OS X backend. If this is merged, someone else will have to fix the OS X version since I do not own a Mac.