1679060 - Large font sizes render blurry in 83.0

Status: RESOLVED DUPLICATE of bug 1677551

(Core :: Graphics: Text, defect)

Description

[Peter Dekkers]

Attachment: Firefox 83.0.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36

Steps to reproduce:

Upgrade from Firefox 82.0.3 to 83.0 on macOS.

Actual results:

Type sizes of around 150px and larger are rendering very blurry. As if they are upscaled.

Expected results:

Under Firefox 82.0.3 these would render crisply.

Comment 1

[Peter Dekkers]

Attachment: Firefox 82.0.3.png

For comparison, the same type renders fine in Firefox 82.0.3.

Comment 2

[Peter Dekkers]

Also I think this is a separate issue to https://bugzilla.mozilla.org/show_bug.cgi?id=1678915, possibly.

Comment 3

[Alice0775 White]

I can reproduce the issue on Nightly85.0a1 Windows10 if WebRender is enabled.

Comment 4

[Alice0775 White]

Attachment: font.html

Comment 5

[Jonathan Kew [:jfkthame]]

This looks like it may be the same issue as bug 1677551. If you set gfx.webrender.force-disabled to true in about:config, and restart Firefox, does the font become crisp again?

Comment 6

[Peter Dekkers]

Attachment: Firefox 83.0 gfx.webrender.force-disabled.png

(In reply to Jonathan Kew (:jfkthame) from comment #5)

This looks like it may be the same issue as bug 1677551. If you set gfx.webrender.force-disabled to true in about:config, and restart Firefox, does the font become crisp again?

Yes indeed, here it is with gfx.webrender.force-disabled set to true.

Comment 7

[Alice0775 White]

Attachment: screenshot

Progression window(crisp->AA):
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8641f3fc2eecab0503f5b0440d5da1473aef58a8&tochange=d02d14a3dd6e172c4cc8efb5c749752d3893fc90

Regression window(All the edges of the glyph become blurred):
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=cc99591503474b92532fe016a10d5efc65947474&tochange=ccc51104ad4250252a0666605fc2b8c96efdc2a0