[pstricks] Real transparency hack
Herbert Voss
LaTeX at zedat.fu-berlin.de
Tue Jul 12 21:20:30 CEST 2005
Jan Steffan wrote:
> However, I found another hack, that allows the use of REAL transparency.
> Although postscript does not support transparency, newer versions of
> ghostscript do:
> http://www.cs.wisc.edu/~ghost/doc/AFPL/8.50/Language.htm#Transparency
>
> When a file using these features is run through ps2pdf14 (not ps2pdf) it
> produces a nice PDF with real transparency effects.(In order to view or print
> it a PDF viewer is required that supports PDF version 1.4. Acrobat 5.0 and
> above and newer versions of ghostscript will do.
>
> I hacked together a proof of concept based on pstricks that defines a new
> fillstyle "transp" as this was the easiest the solution I could quickly find.
> A real solution should provide transparency independently of filling.
>
> I probably also did not consider all sideeffects and problems this hack may
> cause and I surely didn't fully comprehend the PDF transparency mode, which
> is quite complicated.
looks good, I'll put this stuff into pstricks-add
Herbert
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