No, anything inside the XObject.  Think of it as a self-contained mini-PDF that 
you process without any reference to the “container” and then can simply “blit” 
the results onto the original canvas.  (NOTE: that’s not necessarily the 
implementation just the concept)

Leonard

From: Anton Heymann <anton.heym...@cad-essence.com>
Date: Wednesday, August 17, 2016 at 10:00 AM
To: Leonard Rosenthol <lrose...@adobe.com>, 
"podofo-users@lists.sourceforge.net" <podofo-users@lists.sourceforge.net>
Subject: RE: [Podofo-users] Question about Nested XObjects and Images

Leonard

Does this apply to images only? My experience with this particular case, is 
that all XObject contents (e.g. strokes and fills) are correct, however, the 
image data is inserted at it's original location inside the nested XObject. 
Where do I obtain further information about this?I am referring to XObject docs 
in PDF 32000_2000 - 8.10. Do I need to take the BBox into account when using 
images?

Anton

From: Leonard Rosenthol [mailto:lrose...@adobe.com]
Sent: 17 August 2016 12:37
To: Anton Heymann <anton.heym...@cad-essence.com>; 
podofo-users@lists.sourceforge.net
Subject: Re: [Podofo-users] Question about Nested XObjects and Images

All coordinates inside a Form XObject are relative to that XObject – not to the 
primary PDF.

Leonard

From: Anton Heymann 
<anton.heym...@cad-essence.com<mailto:anton.heym...@cad-essence.com>>
Date: Wednesday, August 17, 2016 at 3:55 AM
To: 
"podofo-users@lists.sourceforge.net<mailto:podofo-users@lists.sourceforge.net>" 
<podofo-users@lists.sourceforge.net<mailto:podofo-users@lists.sourceforge.net>>
Subject: [Podofo-users] Question about Nested XObjects and Images

Does anybody have experience with rendering nested XObjects (forms), containing 
an Image xobject(s)? My problem is the positioning of the images. This is the 
scenario

Fm28 contains Fm0 which contains Image Im0.
All form matrices are set to 1 0 0 1 0 0

Im0 is renderer in it's original defined position, not within the BBox of the 
form it has been referenced.

What rules need to be implemented to render the image in the correct location? 
I cannot find information regarding the positioning of the nested forms. When I 
render the BBox of each form, it is in the correct position.

Anton Heymann



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