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Drawing to a PDF Context

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Drawing to a PDF Context

Subject: Drawing to a PDF Context
From: Fabio Mancinelli <email@hidden>
Date: Tue, 27 Mar 2007 23:59:45 +0200

Dear all,

I am trying to do a very simple thing but I am stuck.

I have loaded a PDF and I have a CGPDFDocumentRef.
Now I want to draw a rectangle on a page of this document.

I start with creating a graphic context to draw to.

The CGPDFContextCreate requires a CGDataConsumerRef.

I suppose that I have to create such a consumer by using CGDataConsumerCreateWithCFData because the CGDataConsumerCreate requires that I provide callbacks to put bytes and, obviously, I don't know how to do it in the PDF format.

So now I need a CFMutableDataRef representing the PDF page and pass it to CGDataConsumerCreateWithCFData.

And here I am stuck... How do I retrieve a CFMutableDataRef from a CGPDFPageRef for creating a data consumer?

Thank you,
Fabio
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