1264597 - CSS "repeating-linear-gradient" unstable/imprecise during resizing

Status: UNCONFIRMED

(Core :: Graphics, defect, P3)

Description

[Tobi Reif]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20160407164938

Steps to reproduce:

Load
http://codepen.io/TobiReif/pen/PNRNYy





Actual results:

The pattern generated using CSS's "repeating-linear-gradient" is unstable/imprecise during resizing (when I move e.g. the right edge of the browser window).

(Probably best to try to reproduce it on a non-high-res screen.)

Related info:
In Chrome, the pattern is completely stable during resize.



Expected results:

The pattern should remain stable/unchanged during resizing.

Comment 1

[YF (Yang)]

I don't see the unstable/imprecise during resizing in Fx46b10 & 48.0a1 (2016-04-12) on Win10, instead it has an adjustment lag in Chrome.

Comment 2

[Loic]

Attachment: 1264597.html

Comment 3

[Loic]

Could you attach a screencast of the issue? I can't reproduce it.

Comment 4

[Tobi Reif]

Attachment: screen_video_firefox_mac_os_x.mov

Comment 5

[Tobi Reif]

I hope that you can see the issue in the screen video "screen_video_firefox_mac_os_x.mov", and that you can reproduce it (on eg the latest Mac OS X).

Comment 6

[Loic]

I'm able to reproduce the issue with HWA disabled on Win 7. With HWA enabled, it's fine.

Regression range:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=73eefb421e2a&tochange=735a648bca0d

It's probably due to bug 700926.

Comment 7

[Tobi Reif]

Thanks Loic!

Comment 8

[Tobi Reif]

I hope this can be fixed.