Jonathan Sibony wrote:
> Hello,
> 
> How do I set a Crop Box? (any painting will take place from that point 
> only within the new clipping path).

Do you really want to set the crop box (an attribute of a page, and 
really more a hint to a renderer/RIP)? Or do you want to set a clipping 
path for drawing of a content stream? It sounds more like you want the 
latter.

See:

Pdf Reference, 10.10.1, "Page Boundaries"

I'm not even sure all renderers will honour the crop box - you'll want 
to test that before relying on it instead of a clipping path in the 
content stream. Also, the crop box is sometimes constrained to the media 
box - see implementation note 161 in the PDF reference.

Personally, I'd use a clipping path if I wanted a clipping path, rather 
than using the page crop box.

As for how to actually set the page's crop box - well, you can probably 
poke at the page dictionary directly if necessary. Extending PdfPage 
with appropriate methods wouldn't be too hard or a bad idea though, and 
I'm sure they could be merged into podofo. Have a look at how the 
existing media box is set for ideas.

--
Craig Ringer

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