1510306 - Handbag flickers on Italic home page

Status: RESOLVED DUPLICATE of bug 1510139

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

Description

[Darkspirit]

Attachment: 2018-11-27 17-09-03.mp4

+++ This bug was initially created as a clone of Bug #1510139 +++

Win10, GTX1060

mozregression --good 2017-10-10 --bad 2018-01-15 --pref gfx.webrender.enabled:true gfx.webrendest.enabled:true gfx.webrender.layers-free:true gfx.webrender.blob-images:true image.mem.shared:true layout.display-list.retain:false -a https://italic.com/
> 18:29.76 INFO: Last good revision: f3ea44ff63eec1d2e6edafe94c213860a8cfe11f
> 18:29.76 INFO: First bad revision: 4f88eb1c54fb6c41e432fe5d605a77706266e829
> 18:29.76 INFO: Pushlog:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=f3ea44ff63eec1d2e6edafe94c213860a8cfe11f&tochange=4f88eb1c54fb6c41e432fe5d605a77706266e829

2017-12-01
> 4f88eb1c54fb	Andrew Osmond — Bug 1420648 - Ensure WebRender computes the snapped image decode size the same as the fallback path. r=tnikkel

Screencast:
last good (right): mozregression --repo mozilla-inbound --launch f3ea44ff63eec1d2e6edafe94c213860a8cfe11f --pref gfx.webrender.enabled:true gfx.webrendest.enabled:true gfx.webrender.layers-free:true gfx.webrender.blob-images:true image.mem.shared:true layout.display-list.retain:false -a https://italic.com/

first bad (left): mozregression --repo mozilla-inbound --launch 4f88eb1c54fb6c41e432fe5d605a77706266e829 --pref gfx.webrender.enabled:true gfx.webrendest.enabled:true gfx.webrender.layers-free:true gfx.webrender.blob-images:true image.mem.shared:true layout.display-list.retain:false -a https://italic.com/

Comment 1

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

Same root cause as bug 1510139. Once I fixed all the invalidation issues, the flickering stops. It flickers as sometimes we produce two slightly different sized surfaces due to bug 1453747.