How exactly are layers / optional content groups meant to work?

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floele
Posts: 12
Joined: Sun Feb 13, 2011 8:55 pm

How exactly are layers / optional content groups meant to work?

Post by floele » Mon Jan 08, 2018 3:33 pm

Hi,

GdPicture v12 has added support for PDF layers AKA optional content groups but I can't really get it to work.
My first try was using the sample code from https://guides.gdpicture.com/content/Gd ... ewOCG.html

My expectation is a PDF file containing an additional layer "Image layer" which contains an image. The result, however, is the attached PDF. No image, no layer.

My second try was the sample code from https://guides.gdpicture.com/content/Gd ... ntent.html.
This time there is some content visible, but still no layers.

For reference, I also attached a PDF file that actually contains layers. How would I create a PDF file with GdPicture that works like the attached PDF?

Best regards,
Florian
Attachments
PDF with layers.pdf
(90 KiB) Downloaded 36 times
Sample test_MarkedContentLayer.pdf
(4.1 KiB) Downloaded 39 times
test_ImageLayer.pdf
(7.09 KiB) Downloaded 25 times

Gabriela
Posts: 47
Joined: Wed Nov 22, 2017 9:52 am

Re: How exactly are layers / optional content groups meant to work?

Post by Gabriela » Wed Feb 07, 2018 8:23 pm

Hi,
Unfortunately, we do not support the complete functionality of OCG's, so the newly created layers using GdPicturePDF are not presented in any user interface. For that reason you can't view the layers in the PDF viewers.
Please read the documentation here:
http://guides.gdpicture.com/content/web ... ewOCG.html
Specifically the Remarks section.
Regards,
Gabriela
Kind regards,

Gabriela
GdPicture Team

Gabriela
Posts: 47
Joined: Wed Nov 22, 2017 9:52 am

Re: How exactly are layers / optional content groups meant to work?

Post by Gabriela » Tue Jul 17, 2018 8:35 am

Hi,

The published release 14.0.60 (http://www.gdpicture.com/products/version-history/) includes improved functionality for layers (OCG) in PDF, so they are now fully visible after the creation. You can download the release here: http://www.gdpicture.com/download-gdpicture/
Kind regards,

Gabriela
GdPicture Team

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