Bug 689792 - setoverprint breaks antialias
Summary: setoverprint breaks antialias
Status: RESOLVED FIXED
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: PS Interpreter (show other bugs)
Version: 8.62
Hardware: PC Linux
: P4 normal
Assignee: Michael Vrhel
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-04-14 20:00 UTC by William Bader
Modified: 2020-06-23 21:59 UTC (History)
1 user (show)

See Also:
Customer:
Word Size: ---

Attachments
setoverprint.eps (213.45 KB, application/postscript)
2008-04-14 20:02 UTC, William Bader 		Details
testnoaa.gif (16.84 KB, image/gif)
2008-04-14 20:04 UTC, William Bader 		Details
testaa.gif (16.90 KB, image/gif)
2008-04-14 20:04 UTC, William Bader 		Details
Add an attachment (proposed patch, testcase, etc.)

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Description William Bader 2008-04-14 20:00:55 UTC 
Enabling both antialias and setoverprint makes text go away.
Comment 1 William Bader 2008-04-14 20:02:57 UTC 
Created attachment 3933 [details]
setoverprint.eps

Sample file that shows the problem.  Viewing with antialias makes some text go
away unless you also add "/setoverprint {pop} def".
Comment 2 William Bader 2008-04-14 20:04:03 UTC 
Created attachment 3934 [details]
testnoaa.gif

Test with antialias disabled that shows all of the image.
Comment 3 William Bader 2008-04-14 20:04:42 UTC 
Created attachment 3935 [details]
testaa.gif

Test with antialiasing enabled where a block of text is missing.
Comment 4 Ray Johnston 2008-04-17 10:35:54 UTC 
I suspect this is similar to the problem where anti-alias malfunctions with the
pdf14 compositor device in the chain.
Comment 5 Peter Cherepanov 2020-06-23 21:17:28 UTC 
This problem can be reproduced in old versions of Ghostscript with the following command line.

~/ghostscript-9.00/bin/gs -sDEVICE=x11alpha -dEPSCrop setoverprint.eps

It was fixed in ghostscript-9.04 in 2011.
Please close this bug report as fixed.