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Re: Drawing to a PDF Context
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Re: Drawing to a PDF Context


  • Subject: Re: Drawing to a PDF Context
  • From: Antonio Nunes <email@hidden>
  • Date: Wed, 28 Mar 2007 10:41:20 +0100

On Mar 28, 2007, at 10:20 AM, Fabio Mancinelli wrote:


On Mar 28, 2007, at 8:17 AM, Antonio Nunes wrote:


Hi Fabio,

You do not create CFMutableDataRef from a CGPDFPageRef. The consumer will be the destination of the data from the Quartz drawing functions. You draw the CGPDFPageRef into the PDF context created with the consumer. Here is a minimal example:

So actually, when I want to modify an existing page I have to redraw its content to a newly created page and then do some other drawings. And I can only do "incremental" operations if I am not wrong.

Yes, as far as I know you cannot modify the original page data (at least not the objects on the page, you can change display boxes and stuff). So you create a new PDF document and draw the original to it, then you can add to the contents by drawing more.


-António

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References: 
 >Drawing to a PDF Context (From: Fabio Mancinelli <email@hidden>)

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