1851954 - Linear-gradient with alpha mask not converting to PDF properly

Status: NEW

(Core :: Printing: Output, defect)

Description

[paul.bogg]

Attachment: index_2.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Steps to reproduce:

CSS with linear-gradient that contain alpha masks does not convert properly to PDF.

1. Open attached index_2.html in Firefox
2. Save to PDF (e.g. CTRL-P --> Save to PDF)
3. Open PDF - see that the PDF image does not match the browser rendering

Actual results:

3. Open PDF - see that the PDF image does not match the browser rendering

Expected results:

PDF matches the browser

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::PDF Viewer' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Anca Soncutean, Desktop QA]

Attachment: screenshoot issue.png

I've reproduced this issue on macOS 13, but not on Windows 10. It doesn't seem to be a regression, same behavior is present way back to Fx 81.0a1.

Comment 3

[Calixte Denizet (:calixte)]

Attachment: bug1851954_mac.pdf

I opened the generated (on mac) pdf in Firefox, Chrome, Acrobat and Foxit and the result is the same: a red square is rendered.
And I can confirm that the generated pdf on Windows is correct.
So it's very likely not a pdf.js issue but an issue with Quartz.