1784850 - PDF in viewer fuzzy after resuming from suspend after attaching HiDPI monitor

Status: RESOLVED FIXED

(Firefox :: PDF Viewer, defect, P1)

Description

[Paul Menzel]

Steps to reproduce:

Using Nightly 105.0a1, 20220814095107, having a PDF open in a viewer on a 1366x768 laptop system, suspend the system, attach a HiDPI monitor, and resume.

Actual results:

The font of the PDF was fuzzy.

Expected results:

The font of the PDF should be sharp. Reloading the page, the screen is sharp.

Comment 1

[Paul Menzel]

Attachment: Output of `about:support`

Comment 2

[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 3

[Calixte Denizet (:calixte)]

We could redraw the current pages when the devicePixelRatio is changing.

window.matchMedia(`(resolution: ${window.devicePixelRatio}dppx)`).addEventListener("change", ....)

@Snuffleupagus, wdyt ?

Comment 4

[GitHub Bugzilla PR Linker]

Attachment: Link to GitHub pull-request: https://github.com/mozilla/pdf.js/pull/15319

Comment 5

[Marco Castelluccio [:marco]]

Paul, can you still reproduce this bug in latest Nightly?

Comment 6

[Paul Menzel]

(In reply to Marco Castelluccio [:marco] (back Aug 22) from comment #5)

Paul, can you still reproduce this bug in latest Nightly?

No, the problem seems to be fixed in 105.0a1, 20220821185924.

Thank you all for fixing the issue so quickly.

Comment 7

[Marco Castelluccio [:marco]]

Thank you for reporting the bug and verifying the fix!