1647684 - Incorrect display of graphic elements when `gfx.webrender.all` is set to true

Status: RESOLVED INVALID

(Core :: Graphics: WebRender, defect, P3)

Description

[Oana Arbuzov [:oanaarbuzov]]

Attachment: GrapicBroken.png

Environment:
Browser / Version: Firefox Nightly 79.0a1 (2020-06-22)
Operating System: Windows 10 Pro

Prerequisites:
Set gfx.webrender.all to true in about:config

Steps to Reproduce:
1. Navigate https://www.rifftrax.com/
2. Observe the page.

Expected Behavior:
The graphic elements are displayed correctly.

Actual Behavior:
Some graphic elements are displayed too large and overlap the video.

Note
1. The issue is not reproducible with default state of gfx.webrender.all - false.
2. Screenshot attached.

Comment 1

[Andrew Osmond [:aosmond] (he/him)]

I haven't been able to reproduce this. Could you please attach your about:support? Also, would you be willing to find the regression window on this via mozregression? https://mozilla.github.io/mozregression/quickstart.html

Comment 2

[Oana Arbuzov [:oanaarbuzov]]

I've checked again and the issue no longer reproduces, now the graphics render correctly with gfx.webrender.all set to true.
https://prnt.sc/t7csgh

Environment:
Browser / Version: Firefox Nightly 79.0a1 (2020-06-26)
Operating System: Windows 10 Pro