IPXS_Document Get First Indirect Object + where (at what byte) is that object SOLVED

[zarkogajic]

Hi Support,

Having

IPXS_PDFVariant obj = IPXS_Document.GetNextIndirect(0)

It seems this does not get the first indirect object in the body of the file (after header) ?

Is there a way to know if the object retrieved above is within the first 1024 bytes of the PDF?

What is the sort order of objects retrieved using GetNextIndirect ?

-žarko

[Ivan - Tracker Software]

GetNextIndirect takes a pointer to ULONG_T value, not value itself.
So, the correct use of this method would be:

Code: Select all

ULONG_T enumPos = 0;
IPXS_PDFVariant obj = IPXS_Document.GetNextIndirect(&enumPos);

In regards position (offset) of the object in the document stream - unfortunately, as I see such a method is not available via the SDK. Will add them in the next release.

[zarkogajic]

Hi Ivan,

Thanks. Can you also comment on the sort order of objects retrieved via GetNextIndirect ?

What I'm after is optimizing this code of mine:

https://forum.pdf-xchange.com/viewtopic.php?f=66&t=33063&p=139175&hilit=islinearized#p139175

The "problem" is that if the document is not linearized the above algorithm will iterate over all indirect object - and if there are many - no reason to do so - as the linearization object (if there is one) must be within first 1024 bytes of the file.

I've refactored that code to first get the 1024 bytes (from CoreDocument.SrcInfo.File.Stream) and find the first "obj" and then check if it is the "linearized" one..
However, this cannot be used for documents opened from IStream (https://forum.pdf-xchange.com/viewtopic.php?f=66&t=37890)


-žarko

[Ivan - Tracker Software]

GetNextIndirect goes through all xref tables and all through all records in them.

What we can do, is to add a method to the IPXS_Document which will return Linearization dictionary or null if absent.
We already have it, but it is not exposed in the SDK.

[zarkogajic]

Hi Ivan,

That would be great - thanks.

-ž

[TrackerSupp-Daniel]