1245962 - PDF viewer font rendering inconsistent spacing

Status: RESOLVED WORKSFORME

(Firefox :: PDF Viewer, defect, P3)

Description

[Ray Satiro]

Attachment: Capture.PNG

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Firefox/38.0
Build ID: 20100101

Steps to reproduce:

I'm trying to read that document in Firefox's PDF viewer:

http://legbacore.com/News_files/HowManyMillionBIOSesWouldYouLikeToInfect_Whitepaper_v1.pdf

The spacing is all wrong. I am using ESR 38 at the moment but I also tried in Nightly and the results were the same.


Actual results:

The spacing between letters is inconsistent. For example look at the word 'Abstract' which reads more like 'A bst r act'.


Expected results:

The spacing should be consistent.

Comment 1

[Loic]

Do you have HWA enabled?

Comment 2

[Ray Satiro]

(In reply to Loic from comment #1)
> Do you have HWA enabled?

No, but I enabled it in Nightly and restarted and it doesn't seem to make any difference in the rendering of that document.

Comment 3

[Brendan Dahl [:bdahl]]

Could you try opening the PDF with a clean profile? It is showing up fine for me on windows 7 with hardware acceleration off.

https://www.dropbox.com/s/pteei3tk2shp6p5/Screenshot%202016-02-08%2015.25.23.png?dl=0

Comment 4

[Ray Satiro]

Attachment: PDF in Aurora 20160207004019.PNG

In Nightly there is no difference. As I said I have tried with both HWA enabled and disabled.
47.0a1
20160208030244
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0

I just tried in Aurora now and it looks better when HWA is enabled but kind of grainy (see attachment). When HWA is disabled it looks like Nightly.
46.0a2
20160207004019
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0

Comment 5

[Brendan Dahl [:bdahl]]

Toggling the HWA preference is different than starting with a clean profile. See https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Testing with a clean profile will let us know whether your operating system is rejecting the font or if there's some add-on/setting in your profile that is causing issues.

Comment 6

[Ray Satiro]

Sorry I should have been more specific. I did use clean profiles for the results I disclosed in my last reply. I made a clean profile for Aurora, tested with HWA checked then disabled HWA restarted and tested again. I did the same thing for Nightly. Note Cleartype is disabled on this computer, if that helps. Normally I have no problem viewing PDFs though.

Comment 7

[Ray Satiro]

Attachment: VSDebuggerPDF-FF38ESR.PNG

Comment 8

[Ray Satiro]

Attachment: VSDebuggerPDF-FF47.0a2.PNG

I just uploaded two attachments, VSDebuggerPDF-FF38ESR.PNG and VSDebuggerPDF-FF47.0a2.PNG that show another PDF file with weird font spacing. It seems to be a particular type of font because in other parts of the PDF with other fonts it looks fine. Also peculiar - in 47.0a2 (Aurora) the bad font looks kind of fuzzy compared to 38ESR where it's crisp. Hardware acceleration is disabled in both.

http://www.vmware.com/pdf/ws7_visualstudio_debug.pdf

Comment 9

[Loic]

Does it work better if you enable ClearType?

Comment 10

[Kenan]

Works for me with Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:97.0) Gecko/20100101 Firefox/97.0

Does this bug still exist?