Bug 688797 - Transparency with pre-multiplied alpha does not match Adobe Acrobat
Summary: Transparency with pre-multiplied alpha does not match Adobe Acrobat
Status: RESOLVED FIXED
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: PDF Interpreter (show other bugs)
Version: master
Hardware: All All
: P4 normal
Assignee: Alex Cherepanov
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-07-14 15:03 UTC by Ray Johnston
Modified: 2010-12-01 14:35 UTC (History)
1 user (show)

See Also:
Customer:
Word Size: ---

Attachments
alpha.pdf (129.13 KB, application/pdf)
2006-07-14 15:03 UTC, Ray Johnston 		Details
screen grab of xpdf,acroread,gsview (140.43 KB, image/png)
2006-07-17 11:27 UTC, Hin-Tak Leung 		Details
Add an attachment (proposed patch, testcase, etc.)

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Description Ray Johnston 2006-07-14 15:03:10 UTC 
File generated from Office 12 (changes since Beta 2) 'Save as PDF' is not
displayed the same as Adobe Acrobat 7.0.

Testing with xpdf and OS/X preview show same output as Ghostscript (according
to Stefan).
Comment 1 Ray Johnston 2006-07-14 15:03:38 UTC 
Created attachment 2354 [details]
alpha.pdf
Comment 2 Hin-Tak Leung 2006-07-17 11:27:39 UTC 
Created attachment 2359 [details]
screen grab of xpdf,acroread,gsview

screen grab of the pdf under gsview, xpdf, acroread on linux.
Should be obvious which is which.
Comment 3 Ralph Giles 2006-07-19 09:53:00 UTC 
Ghostscript needs to be updated to support this feature properly. Seems to be a
corner case in the spec no one has exercised before.
Comment 4 Alex Cherepanov 2010-12-01 14:35:55 UTC 
This file works fine in v. 9.00 and the HEAD.