Re: possible issue with ps2pdf (9.25) and transparency

Paul Wessel <[email protected]> Sat, 15 Sep 2018 14:02:36 -0700
Newsgroups gmane.comp.printing.ghostscript.devel
Message-ID <CANDdAJCf2qGJAviB1Q_0z+dfVaBp8MDjZN_Nu7fW7JnJ7PXqgg@mail.gmail.com>
Aloha-

We also just noticed a regression w.r.t. transparency today.  9.23 handled
transparency correctly, 9.24 broke it, and I just built 9.25 today and it
still has that problem.

Attached is a 26-line ps file that plots two overlapping squares, the blue
is transparent.  The following gs command produces the PDF which was
transparent for versions prior to 9.24.

gs -q -dSAFER -dNOPAUSE -dBATCH -sDEVICE=pdfwrite  -g2160x2160 -r720
-sOutputFile=gsbug.pdf -fgsbug.ps


Cheers, Paul Wessel

GMT Lead (gmt.soest.hawaii.edu)

On September 15, 2018 at 7:32:46 AM, James Cloos ([email protected]) wrote:

>>>>> "KS" == Ken Sharp <[email protected]> writes:

KS> Without a complete Ghostscript command line, and an example file to
KS> look at, no.

The ps file uses .setopacityalpha to specify the alpha.

This is a regression and should be fixed.

-JimC
-- 
James Cloos <[email protected]> OpenPGP: 0x997A9F17ED7DAEA6
gsbug.ps (application/octet-stream, 618 B) - not displayed