Bug 689814 - tiffsep problem with Spot+Transparency
Summary: tiffsep problem with Spot+Transparency
Status: NOTIFIED DUPLICATE of bug 689895
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: Color (show other bugs)
Version: master
Hardware: PC Linux
: P4 normal
Assignee: Michael Vrhel
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-05-02 08:13 UTC by Marcos H. Woehrmann
Modified: 2011-09-18 21:47 UTC (History)
0 users

See Also:
Customer: 190
Word Size: ---

Attachments
85_percent.pdf (105.53 KB, application/pdf)
2008-05-02 08:14 UTC, Marcos H. Woehrmann 		Details
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Marcos H. Woehrmann 2008-05-02 08:13:47 UTC 
The customer reports:

The attached file has 2 spot colors, which are used with transparency levels.

Using GS 8.62, I get different results when ripping it with tiff32nc, and then
tiffsep. The output of tiff32nc is correct (and the same than in AR8), and the
one of tiffsep is wrong. It seems that the density levels of the spot
separations are inverted (e.g. the characters painted with "spotwhite" color
have densty 85% instead of 15%).

Note this is *not* a general issue with tiffsep: I have other PDF files using
spot colors and transparency which are correctly processed by 8.62.


-----------------------------------------------------------------

I've duplicated his results with gshead (r8693) with the command lines:

  bin/gs -sDEVICE=tiffsep -sOutputFile=test.tiff -r30 ./85_percent.pdf

and

  bin/gs -sDEVICE=tiff24nc -sOutputFile=test.tiff -r30 ./85_percent.pdf
Comment 1 Marcos H. Woehrmann 2008-05-02 08:14:14 UTC 
Created attachment 3976 [details]
85_percent.pdf
Comment 2 Ralph Giles 2008-05-20 17:11:55 UTC 
Blend space getting the wrong polarity?
Comment 3 Ken Sharp 2008-06-20 00:32:30 UTC 
This appears to be a duplicate of bug #689895 from the same customer. The patch
appended to that issue also resolves this one.


*** This bug has been marked as a duplicate of 689895 ***
Comment 4 Marcos H. Woehrmann 2011-09-18 21:47:00 UTC 
Changing customer bugs that have been resolved more than a year ago to closed.