Re: NSData from CGPDFPageRef
Re: NSData from CGPDFPageRef
- Subject: Re: NSData from CGPDFPageRef
- From: Christian Ziegler <email@hidden>
- Date: Thu, 20 May 2010 15:56:16 +0200
Thanks for your reply Kyle!
Well, I don't know the exact data structure of pdfs but I'm just figuring it out step by step. Anyways, what I am trying to achieve is, to create a kind of fingerprint of a pdf page and it should be as performant as possible and as platform independent as possible (that may be too much too ask but we'll see). I would assume extracting a page and creating a new document is not very efficient? I just want to avoid parsing, but it looks like I won't get around that. I'll just have to figure out whether parsing every single object/operator in the stream(s) of a page is necessary.
Cheers,
Chris
On 20.05.2010, at 15:26, Kyle Sluder wrote:
> On May 20, 2010, at 4:25 AM, Christian Ziegler <email@hidden> wrote:
>
>> unfortunately that is not what I'm looking for. I want to be able to load an existing pdf file and create some byte representation of each page.
>
> This doesn't really make any sense. How is a PDF page meaningful outside of a PDF document? What would a "data representation" of a page contain?
>
> You could extract the page into its own document and get a data representation of that.
>
> --Kyle Sluder
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