Bug 691821 - Some pages do not antialias text
Summary: Some pages do not antialias text
Status: RESOLVED DUPLICATE of bug 689044
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: Text (show other bugs)
Version: master
Hardware: All All
: P4 normal
Assignee: Ken Sharp
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-12-07 20:31 UTC by Joshua Smith
Modified: 2010-12-07 21:08 UTC (History)
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Attachments
Two-page PDF. The first aa's, the second does not. (864.95 KB, application/pdf)
2010-12-07 20:31 UTC, Joshua Smith 		Details
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Description Joshua Smith 2010-12-07 20:31:41 UTC 
Created attachment 7009 [details]
Two-page PDF.  The first aa's, the second does not.

The attached PDF contains two pages.  When rendered with this command line:

gs -q -dQUIET -dBATCH -dNOPROMPT -dNOPAUSE -dNOPSICC -dDisableFAPI -sDEVICE=jpeg -dJPEGQ=100 -r150x150 -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -dDOINTERPOLATE -dMaxBitmap=512000000 -sOutputFile=%d-aa.jpg aa.pdf

The first page text renders antialiased, but the second page text is aliased.

If I pass -dTextAlphaBits=1 then both pages are aliased.  So it appears that something is causing gs to turn off antialiasing of the second page.
Comment 1 Ray Johnston 2010-12-07 21:08:16 UTC 
I looked and the second page uses transparency. We already have an open bug
for AA and transparency.

Page 1 MediaBox: [ 612 792 ]
Page 2 MediaBox: [ 612 792 ]     Page uses transparency features

*** This bug has been marked as a duplicate of bug 689044 ***