2050191 - PDF text selection not visible for some drivers or with backdrop-filter disabled

Status: ASSIGNED

(Firefox :: PDF Viewer, defect, P1)

Description

[Kestrel]

Attachment: Text selection in PDF not visible without backdrop-filter

STR:

1. Launch latest Nighly 154.0a1.
2. Set layout.css.backdrop-filter.enabled = false or use a blocklisted graphics driver.
3. Open a PDF and make a text selection.

Expected:
Text selection visible like before.

Actual:
Text selection not visible.

FEATURE_BACKDROP_FILTER is blocklisted for some Intel drivers (Bug 1785366, Bug 1784093).
https://searchfox.org/firefox-main/rev/850e4be1127e6854cfef5be7beeaf4c054ec69a4/widget/windows/GfxInfo.cpp#1817

There should be a fallback when backdrop-filter is blocklisted or disabled.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=b4d525759da6b2930dda4922c3895a2c90c1fa17&tochange=4dfbc8ea625093d65508ad8b576548ca96097b00

Regressed by Bug 2041566.

Comment 1

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

:calixte, since you are the author of the regressor, bug 2041566, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

[BMO Github Automation]

Attachment: [mozilla/pdf.js] Disable selection rendering when backdrop-filter is unsupported (bug 2050191) (#21500)