Bug 691821

Summary:	Some pages do not antialias text
Product:	Ghostscript	Reporter:	Joshua Smith <jesmith>
Component:	Text	Assignee:	Ken Sharp <ken.sharp>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	P4
Version:	master
Hardware:	All
OS:	All
Customer:		Word Size:	---
Attachments:	Two-page PDF. The first aa's, the second does not.

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 ***