[pdftex] redundant objects with includegraphics

[Otfried Cheong]

 > > if I do it, I would try to keep track of all copied objects from
 > > pdf images. Each pdf image would have a list of all objects that
 > > have been copied from the image. Images that have the same file
 > > name would share their object list. When an object is being
 > > copied, its number is checked whether it has been copied yet to
 > > avoid duplicates. This way only needed objects are copied and
 > > just once. The penalty might be in the running time, but I really
 > > doubt it matters. The rest like syntax & use with
 > > \includegraphics remains tha same.
 > 
 > I have been thinking more of this issue and it seems to be quite feasible
 > to do so. If you didn't start yet I will give a try.

Hi Thanh,

actually I've already finished my patch, and am testing it just right
now :-) As you say, it wasn't that hard to do it right, without having
to introduce a new primitive.

I'll put up a patch later today or tomorrow.

Best wishes,
  Otfried