How to support Watermark in CUPS driver

[keens312]

> keens312 wrote:
> > Hi Michael,
> >
> > To support Watermark in my CUPS driver, how much work to do?
>
> Depends on the what kind of watermarking you want to do, but the
> easiest thing to do is a PDF pre-filter using CoreGraphics and
> CoreText.
>
> --
> ______________________________________________________________________
> Michael R Sweet                        Senior Printing System Engineer
>
Hi Michael,

To implement such a PDF pre-filter, do we have to interpret and render the PDF content, then blend the watermark?

If not, how to blend the PDF with the watermark with CoreText or CoreGraphics?