834237 - pdf.js: Chapter headlines in some PDFs are ugly because one headline has an overlap with another.

Status: RESOLVED FIXED

(Firefox :: PDF Viewer, defect, P2)

Description

[rshimazu]

User Agent: Mozilla/5.0 (Windows NT 6.0; rv:19.0) Gecko/20100101 Firefox/19.0
Build ID: 20130109111322

Steps to reproduce:

I accessed to the following urls with Firefox 19 beta1(pdf.js 0.7.82)

http://www.nisshinkyo.org/j251.pdf
http://www.objectclub.jp/community/codingstandard/CodingStd.pdf#page=5
http://www.cals.jacic.or.jp/coreconso/parts/johokoukai05_06_kaihi.pdf


Actual results:

Chapter headlines are ugly. One headline has an overlap with another.
Like a shadow. 

If you save the file and open it with Adobe Reader, you will find how it should look like.


Expected results:

pdf.js should show chapter headline the same way other PDF viewers show.

Comment 1

[Pomax]

Attachment: j251 rendering in Adobe Acrobat Reader

Comment 2

[Manuela Muntean [Away]]

I was able to reproduce this issue with Firefox 19 beta 1, on a Windows 7 on 64-bit machine.

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0
Build ID: 20130109111322


With the Firefox 19 beta 3 build, everything looks as expected now.

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0
Build ID: 20130123083802

Comment 3

[Manuela Muntean [Away]]

This issue is also reproducible with a Vista 32-bit machine, using Firefox beta 1, build ID: 20130109111322

With Firefox 19 beta 3, build ID: 20130123083802, on a Vista 32-bit machine, everything works as expected.

Comment 4

[Manuela Muntean [Away]]

Mike, do you still get the bad rendering with Firefox 19 beta 3?

Comment 5

[Alice0775 White]

I can reproduce in Firefox19.0b4
http://hg.mozilla.org/releases/mozilla-beta/rev/e815122c4b1f
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0 ID:20130130080006

And Nightly21.0a1 as well.
http://hg.mozilla.org/mozilla-central/rev/4e7c92906a79
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20130202 Firefox/21.0 ID:20130202030955

Comment 6

[rshimazu]

Attachment: j251 rendering in pdf.js

I tested it on Firefox 19 beta6 with pdf.js 0.7.234

Comment 7

[Masatoshi Kimura [:emk]]

This is because fillText uses bitmaps while strokeText uses outlines from East-Asian TrueType fonts with bitmap glyphs.
Maybe we will need a new canvas API such as fillAndStrokeText.

Comment 8

[Loic]

About j251.pdf, it's fixed:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=a475f94bb1b1&tochange=beddd6d4bcdf

Fixed by:
Ryan VanderMeulen — Bug 937670 - Update pdf.js to version 0.8.681. r=bdahl