--- Comment #22 from Martin K <> 2011-06-16 21:36:22 
UTC ---
I'll split my answers.

Add "Add support for lazy object number assignment":

The codes creates an PDF structure tree containing objects, which will be
trimmed away (eg. because they are empty leaf objects).

Without lazy object number assignment such objects will get an object number
too, as they are assigned while creating these objects. It will increase the
xref size and the xref entries for such numbers will be incorrect (as there is
no support for free object numbers).

Lazy assignment is the simplest solution for this problem without rewriting
larger parts of the code. For such objects, the assignment will happen, when
the first reference to such objects (or the object itself) is written into the

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