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?
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.
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/
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