jjalink wrote:
> Hi,
> A little background:
The background is confusing, so I'll remove it.
> i found no way to list the OCGs names.
Map<String, PdfLayer> layers = stamper.getPdfLayers();
if (!layers.isEmpty()) {
Set<String> keys = layers.keySet();
for (String key : keys) {
System.out.println("Layer name: " + key);
PdfLayer layer = layers.get(key);
// do stuff with layer...
}
}
> 1. Is there any way to add a watermark similar to the one added in acrobat??
You're assuming that we know how a watermark is added in Acrobat or
using Adobe SDK. That assumption is wrong. You need to tell us what you
want using ISO-32000-1 or the PDF reference, not by explaining how it's
done in other tools.
> 2. How can I see if a watermark exists?
That depends on what you mean by watermark?
Seems like you assume that a watermark is always in an OCG.
You ignore the possibility of having watermark annotations,
or the possibility of adding a watermark as an XObject.
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