Bug 31062

Summary:	Regression: Printing certain documents yields characters scattered all over the page
Product:	cairo	Reporter:	Marcel Stimberg <stimberg>
Component:	general	Assignee:	Carl Worth <cworth>
Status:	RESOLVED FIXED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	major
Priority:	medium	CC:	stimberg
Version:	1.10.0
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Marcel Stimberg 2010-10-23 06:36:19 UTC

In the Ubuntu bug tracker, bug reports are piling up about evince producing scrambled documents when printing (also when printing to file, also seen in print preview):
https://bugs.launchpad.net/ubuntu/+source/evince/+bug/661724

This seems to be a regression, evince in Ubuntu 10.10 (cairo 1.10.0) shows this issue, evince in Ubuntu 10.04 (cairo 1.8.10) does not.

One example document showing this problem:
http://www.fincen.gov/fin104_ctr.pdf
And this is the output of "Print to file (PDF)":
https://bugs.launchpad.net/ubuntu/+source/evince/+bug/661724/+attachment/1699993/+files/output.pdf

When I build evince in Ubuntu 10.04 with the newer version of cairo, I can reproduce this problem, therefore I think it is really a cairo bug. 

I tried bisecting cairo from git, and it points to this commit as introducing the problem:
edcefa87ed0a8ff59b54ef9251182ce68f9158ba type1: Use correct glyph advance when subsetting type 1 fonts
http://cgit.freedesktop.org/cairo/commit/?id=edcefa87ed0a8ff59b54ef9251182ce68f9158ba

It's perfectly possible that I did something wrong in debugging this issue, but the above commit sounds at least potentially related.

Comment 1 Adrian Johnson 2010-10-23 18:15:14 UTC

Fixed in master with http://cgit.freedesktop.org/cairo/commit/?id=6dc0b19adb6da690ad5944623081b9cdb42de066

Comment 2 Adrian Johnson 2010-10-23 18:16:53 UTC

Fixed in 1.10 with http://cgit.freedesktop.org/cairo/commit/?h=1.10&id=f47830dbbc34c7068ccdd8f7f9042e8734c9e408

You will probably also need http://cgit.freedesktop.org/cairo/commit/?h=1.10&id=43c93f2b101f534f8aa4213403af3281fcdc17fb for the patch to apply cleanly.

Comment 3 Marcel Stimberg 2010-10-25 08:32:50 UTC

Thanks for the fast response! The fix (the two 1.10 patches together) seems to work for me on the package in Ubuntu 10.10.
I added the patch to the Ubuntu package and am now waiting for others to test it.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.