> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Sebastian Koch
> Sent: Wednesday, August 27, 2008 11:07 AM
> To: [email protected]
> Subject: [iText-questions] problem adding overlay text
>
>
> Hi,
>
> I have some problems adding an overlay-text to an existing pdf-file.
>
> My first approach was to get the OverContent from the
> stamper, using it to
> create a Graphics2D to write a string to it. For writing the
> string I used a
> transparent black as Color.
>
> The output-pdf looks and prints just fine.
iText did correctly what it had to do.
> Converting the pdf to ps is
> problematic though.
You should complain to whoever does the conversion, iText has nothing to do
with it.
> Converting using xpdf's pdftops results in a 100% opaque overlay-text.
No transparency support, maybe.
> Converting using gs's pdf2ps results in a ps which prints ok, but the
> filesize is not acceptable. (like 5-6 mb for one page)
Transparency causes the page to be rasterized. That's a ps limitation.
>
> So my second approach was to use the UnderContent instead of
> the OverContent
> and use a 'normal' gray (no transparency) to write the string.
> Both, pdf2ps and pdftops create ps-files with a small size
> and both print
> correctly...
>
No transparency and all is well.
> ... however, now comes the problem I just could not solve:
> some of the PDFs already have a backgroundimage with solid
> white, writing in
> solid gray to the UnderContent doesn't help much ...
> Is there any way to write text just over the backgroundimage
> but under the
> rest of the pdf-content ?
No, unless you are ready to have a lot of work analyzing the content stream.
Paulo
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