Splitting large PDFs

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   I have an application for splitting multipage PDFs. It uses DPLLoadFromFile and DPLExtractPages to generate a new PDF for every page which it then writes out as a completely new PDF. So far so good.

Some PDFs are too large to load into memory so I plan to use the direct access functions. But I can't find a direct access function to copy a page from the opened PDF file into a new PDF document. Effectively I want a direct access version of DPLExtractPages.

I've searched the documentation, the examples, the forums and the Internet and no joy. Probably I'm just being unimaginative or missing something obvious. But I would really appreciate any help or tips.

Thanks, Gordon

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gkbeckmann Members Profile Find Members Posts Beginner Joined: 13 Jun 13 Status: Offline Points: 2	Post Options Post Reply Quote gkbeckmann Report Post Thanks(0) Quote Reply Topic: Splitting large PDFs Posted: 13 Jun 13 at 11:54AM
	I have an application for splitting multipage PDFs. It uses DPLLoadFromFile and DPLExtractPages to generate a new PDF for every page which it then writes out as a completely new PDF. So far so good. Some PDFs are too large to load into memory so I plan to use the direct access functions. But I can't find a direct access function to copy a page from the opened PDF file into a new PDF document. Effectively I want a direct access version of DPLExtractPages. I've searched the documentation, the examples, the forums and the Internet and no joy. Probably I'm just being unimaginative or missing something obvious. But I would really appreciate any help or tips. Thanks, Gordon

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 14 Jun 13 at 3:11AM
	Gordon, QP.ExtractFilePages internally uses the DA code to split PDF's. We have recently made some improvements to this function in the 9.15 betas and have also added QP.ExtractFilePagesEx with extra options. Also if you call QP.TransformFile to optimise the PDF file first then you may find the whole split process will run much faster in certain cases depending on how optimised the input PDF file is. TransofrmFile can also remove some unused xref entries from the output file thus making the output files smaller also. The latest improvements can be found on DQPL 9.15 Beta 2 which can be downloaded from here http://www.debenu.com/blog/debenu-quick-pdf-library-9-15-beta-2-released.html Andrew. Edited by AndrewC - 14 Jun 13 at 3:16AM

gkbeckmann Members Profile Find Members Posts Beginner Joined: 13 Jun 13 Status: Offline Points: 2	Post Options Post Reply Quote gkbeckmann Report Post Thanks(0) Quote Reply Posted: 20 Jun 13 at 4:08PM
	That's absolutely brilliant. Thank you. Working a treat. Now that I know I realise that I should have spotted it from the documentation, next time I'll look harder.