Bug 688778 - Support PDF 1.4 transparency features with spot colors.
Summary: Support PDF 1.4 transparency features with spot colors.
Status: NOTIFIED FIXED
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: Color (show other bugs)
Version: master
Hardware: All All
: P2 normal
Assignee: Michael Vrhel
URL:
Keywords:
: 689194 (view as bug list)
Depends on:
Blocks:
 
Reported: 2006-07-03 20:24 UTC by Dan Coby
Modified: 2009-01-20 17:25 UTC (History)
1 user (show)

See Also:
Customer: 190 330
Word Size: ---

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Description Dan Coby 2006-07-03 20:24:22 UTC 
The given test file uses both PDF 1.4 transparency (soft masks) and spot 
colors.  PDF 1.4 transparency compositing currently uses either an RGB or a 
CMYK process color model.  As a result when doing PDF 1.4 transparency 
compositing, the spot colors are converted using the color space's tint 
transform function.

To properly support spot colors with PDF 1.4 transparency features, the 
process color model for the PDF 1.4 conpositor needs to be extened to support 
spot colors.  (A sub task of this enhancement is to determine the number of 
spot colors prior to the main processing of page.  This is needed so that 
buffer space can be allocated and to limit processing time. Determining the 
number of spot colors is probably practical for a PDF file but not for a PS 
file.  Fortunately transparency compositing is only a feature of PDF and not 
PostScript.)
Comment 1 Dan Coby 2006-07-03 20:31:07 UTC 
Created attachment 2322 [details]
test file
Comment 2 Dan Coby 2006-08-17 22:24:38 UTC 
Add a second customer.
Comment 3 Timothy Osborn 2007-04-26 07:04:03 UTC 
*** Bug 689194 has been marked as a duplicate of this bug. ***
Comment 4 Ralph Giles 2008-11-25 09:39:43 UTC 
Passing to Michael for load balancing.
Comment 5 Michael Vrhel 2009-01-07 09:43:39 UTC 
This works with r9331.