PDFsharp & MigraDoc Foundation

I'm merging a bunch of PDF files, most of which are basically the same, with some images, and some differing text.

I'm doing this by using XPdfForm.FromStream to open the files, navigating to the Page; then creating a new XForm in my document, drawing into that XForm, and finally, drawing that XForm onto a page.

What I'd like to add to this is the ability to identify duplicate images when drawing to my XForm. But I'm not sure how best to go about that. I'm sure I can write code to navigate through each document and identify the images themselves, from a hash of the stream data or such: but how can I do this when working with a source XPdfForm, to a destination XForm? There seems to be no way to add some sort of object-filter of any sort to the XGraphics created from FromForm.

In an ideal world, PDFsharp would remove all duplicate objects (images, fonts) while saving.

It's on our wishlist.
It seems there was already an implementation for this problem.
viewtopic.php?f=4&t=648

I don't know why it was removed, but the old source is still available at SourceForge.

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Regards
Thomas Hoevel
PDFsharp Team