1175145 - Bad text rendering in PDF

Status: RESOLVED WORKSFORME

(Firefox :: PDF Viewer, defect, P3)

Description

[Yury Delendik (:yury)]

(based on https://github.com/mozilla/pdf.js/issues/6115) This used to render fine, but now the text on the second page renders horribly. 

The display regressed in FF 38:



mozregression bisect results:

Last good revision: 34a66aaaca81 (2015-02-05)
First bad revision: 7c5f187b65bf (2015-02-06)
Pushlog:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=34a66aaaca81&tochange=7c5f187b65bf


Last good revision: 0c2f7434c325
First bad revision: 351d130b72ef
Pushlog:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=0c2f7434c325&tochange=351d130b72ef


The first bad revision is:
changeset:   227583:0678a9a04d59
user:        Bas Schouten <[e-mail]>
date:        Wed Feb 04 22:03:21 2015 +0100
summary:     Bug 1083245: Pop all clips before copying to the destination blending surface. r=jrmuizel

Comment 1

[Alice0775 White]

Attachment: o1_09_12.pdf

bold font looks thin in places depended on zoom level.
this is same regression range.

Comment 2

[Alice0775 White]

Pls ignore comment #1, sorry spam

Comment 3

[Brendan Dahl [:bdahl]]

Any thoughts on this regression?

Comment 4

[Bas Schouten (:bas.schouten)]

(In reply to Brendan Dahl [:bdahl] from comment #3)
> Any thoughts on this regression?

Hmm, this code changes a bit with a patch that I'm landing the next couple of days, let's see if that coincidentally fixes this. I wonder why that PDF is using mix blend modes in the first place though.

Comment 5

[Sylvestre Ledru [:Sylvestre]]

Moving to p3 because no activity for at least 1 year(s).
See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information

Comment 6

[Kenan]

Can we close this bug?

As mentioned in https://github.com/mozilla/pdf.js/issues/6115:

" Snuffleupagus commented on 5 May 2016:

This WFM now, using Windows 7 (64-bit), and Firefox Nightly 49 (with HWA on):

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0 ID:20160504043118 CSet: 369a5ee3a2880a4a98df3a00bf3db8d8f36b181b"

Unfortunately the referred PDF is no longer available, so further testing cannot be done.

Comment 7

[Marco Castelluccio [:marco]]

I've found the PDF on web.archive.org: https://web.archive.org/web/20160828153520/http://www.kennemerlyceum.nl/attachments/article/4/Gymnasiumfolder.pdf.

Comment 8

[Marco Castelluccio [:marco]]

Oh no, actually the web.archive.org URL is also 404...