See also
https://stackoverflow.com/questions/53108150/rotate-text-at-45-degree-angle-across-the-center-apache-pdfbox
Tilman
Am 06.01.2019 um 07:40 schrieb Tilman Hausherr:
Am 05.01.2019 um 21:30 schrieb Don Wills:
Hello,
I'm a newbie to PDFBox. It appears to be a very useful tool for what
we're trying to accomplish.
FWIW, in the past we have been building our own raw PDF files from
scratch for simple printed output from Java code. It was tedious,
but with a minimal API on top, it worked. Thus I have a bit of
knowledge about the structure of a PDF, but not much more.
I have noticed that when images, text and graphics are mixed in a
single PDPageContentStream in no particular order, it appears that
the elements are displayed and printed in layers. From my initial
tests, it appears that graphics (lines and filled polygons) are at
the lowest layer, text is above the graphics, and images are on top
of graphics and text. Is that correct? Is that a feature or an
accident? Is that a feature of the PDF spec or PDFBox? Is that
behavior documented anywhere?
It depends on the order in the content stream. This can be chosen freely.
See the PDF specification...
I need to put a watermark on each page of a report. So for each page
of the report I create a PDPageContentStream, draw the watermark
image on that content stream, close it, and then create a second
PDPageContentStream in APPEND mode for the page that contains the
text, graphics and images of the page. All seems to work well. Is
that the correct approach, or is there another better method?
Yes that is one solution.
Another is to append and to use transparency.
Also, is there a place where I can search for answers to questions
like this? I'm sure this particular question has been answered
before. I couldn't find anything on StackOverflow and I have no idea
how to search the archives of this email list.
"pdfbox watermark" finds a few on stackoverflow.
Tilman
TIA.
Don Wills
Portable Software Company
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