The tx, ty, w, and h passed in are used directly for painting -- the render object's local position isn't added to tx/ty as it is elsewhere, so it really *is* representing a position, not an offset.
Created attachment 93028 [details]
Comment on attachment 93028 [details]
Clearing flags on attachment: 93028
Committed r86188: <http://trac.webkit.org/changeset/86188>
All reviewed patches have been landed. Closing bug.