PDF Viewer Has a Black/Grey Overlap on Rendered File (Firefox only)

[smajid25]

Link to PDF file (or attach file here):
February Collision Generic PC R2-1.pdf

*****Note: Issue only appears on the first page of the documents ******
Configuration:

• Web browser and its version: FireFox latest version
• Operating system and its version: Windows 10 OS
• PDF.js version: Current Stable version
• Is an extension: No

Steps to reproduce the problem:

1. Use pdf.js and place link inside source
2. Open with all browsers
3. Problem will be seen in Firefox only and appear normal in IE and Firefox

What is the expected behavior? (add screenshot)

What went wrong? (add screenshot)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

[yurydelendik]

Unable to reproduce on Mac OS

[SamyCookie]

Same on Linux Debian Jessie and testing: not reproductible.

[yurydelendik]

@smajid25 can you paste graphics section from about:support ?

[smajid25]

What do you mean by graphics section from about:support?
I haven't tested this on Mac OS yet, but when using this link below the problem should be prevalent. Open with Firefox on Windows 10 OS:

https://s3.amazonaws.com/VCUSA/WPP/assets+/MarketingAssets/January%20Collision%20Generic%20PC%20R1-3.pdf

[smajid25]

When using Firefox default pdf viewer it is also prevalent like the link I have provided above

[yurydelendik]

Sounds like regression from https://bugzilla.mozilla.org/show_bug.cgi?id=1303534 (which fixes #7556)

[smajid25]

Hmmmm so the first link says it will work right if HWA (Hardware Acceleration?) is disabled and from what I understand, from the second link, this is an upstream issue. So I am just curious as to what is the root cause of this issue and can this issue be resolved?
Also thank you looking into this issue, I appreciate the quick responses.

[Snuffleupagus]

I've filed the following two upstream bugs, since both of the issues are unfortunately regressions:

• https://bugzilla.mozilla.org/show_bug.cgi?id=1336572, for issue PDF Viewer in Web not displaying content #8019.

• https://bugzilla.mozilla.org/show_bug.cgi?id=1336591, for this issue (i.e. PDF Viewer Has a Black/Grey Overlap on Rendered File (Firefox only) #8022).
  Note that in this case, there's actually two different regression points.

---

For tracking down regressions in Firefox, mozregression can be used; please see http://mozilla.github.io/mozregression/ for more information.

[smajid25]

Just to confirm, this issue involves the Firefox browser and not the PDF.js, right?

[yurydelendik]

Just to confirm, this issue involves the Firefox browser and not the PDF.js, right?

Correct, and only on windows with hwa enabled.

[smajid25]

Ok great, and is there a specific reason why this issue only applies to certain PDFs, because it only appears on 2 of the 5 PDFs that I tested. In other words what could I do to the PDFs I create/generate to avoid this issue from occurring in the first place?

[yurydelendik]

In other words what could I do to the PDFs I create/generate to avoid this issue from occurring in the first place?

Based on upstream bug it's related to the specific sequence of clip() and restore() operations.

[smajid25]

I'm assuming that these two methods are involved in the rendering of the PDF's? I guess there's not much I can do on my end other than using less images in the PDF's I generate or avoid using images that trigger this.

[timvandermeij]

Is this still a problem on Windows? It works fine for me on Linux and given the age of the issue I'm wondering if this perhaps already got fixed upstream. @Snuffleupagus Could you perhaps check this on Windows?

[Snuffleupagus]

Could you perhaps check this on Windows?

Unfortunately this is still just as broken as before, which isn't that surprising given that both of the bugs mentioned in #8022 (comment) are not yet fixed :-(

[Snuffleupagus]

Fixed by https://bugzilla.mozilla.org/show_bug.cgi?id=1336591