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Issue 796963 link

Starred by 3 users
Status: Duplicate
Merged: issue 795528
Owner:
mtklein@chromium.org
Closed: Jan 2018
Cc:
█ reed@chromium.org
█ bsalomon@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows
Pri: 2
Type: Bug-Regression



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Elements jump a few pixels after completing a blur animation

Reported by xan...@embold.com, Dec 21 2017 
UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36

Steps to reproduce the problem:
1. Add an animation to an element that animates filter: blur
2. Watch it jitter every time the animation completes

What is the expected behavior?
It to not jitter.

What went wrong?
It jitters. It didn't used to, and only started jittering (tested on multiple machines) in some recent update.

Did this work before? Yes 

Does this work in other browsers? Yes

Chrome version: 63.0.3239.108  Channel: stable
OS Version: 
Flash Version:
jitter.gif
11.0 MB View Download

Comment 2 by krajshree@chromium.org, Dec 22 2017

Components: Blink>Animation
Labels: hasbisect-per-revision ReleaseBlock-Stable Triaged-ET M-64 Needs-Triage-M63 OS-Windows
Status: Untriaged (was: Unconfirmed)
Able to reproduce the issue on Win-10 and Ubuntu 14.04 using chrome reported version #63.0.3239.108, latest dev #65.0.3298.3 and latest beta #64.0.3282.39 but the same is not reproducible in the latest canary #65.0.3301.0.
Issue is not seen in OS-mac.

Reverse Bisect Information:
=====================
Good build: 65.0.3300.0  
Bad Build : 65.0.3299.0  

Change Log URL: 
https://chromium.googlesource.com/chromium/src/+log/898a5a6e89457550e62d2612ab45cbf1d6087775..dc8531cb84f4d3334fc520c2c9269935a90d0c30

skia CL:
https://skia.googlesource.com/skia.git/+log/0dec3af001ac..539040cbf9f6

Unable to find any possible suspect from the above CL. Hence, requesting someone from dev team to please help us in assigning it to the right owner and merge to M-64.

Note: Adding RBS as it seems to be a recent regression. Please feel free to remove the same if not appropriate.

Thanks...!!

Comment 3 by krajshree@chromium.org, Dec 22 2017

Cc: reed@chromium.org bsalomon@chromium.org

Comment 4 by chasesb...@gmail.com, Dec 24 2017 

Here's a reduced test case in #63.0.3239.108

https://codepen.io/chasebank/pen/KZgYXK

The shifting doesn't seem limited to transitions or animations.

Example toggles a .1px blur without transition.
filter-transition.gif
82.4 KB View Download

Comment 5 by ericwilligers@chromium.org, Dec 28 2017

Components: -Blink>Animation Blink>Compositing>Filters

Comment 6 by schenney@chromium.org, Jan 2 2018

Components: -Blink>Compositing>Filters Internals>Skia
Owner: mtklein@chromium.org
Status: Assigned (was: Untriaged)
Probably fixed by https://skia.googlesource.com/skia.git/+/bc9f3499c345ce59f8cd3889c580fa75db54034b

Possible to merge? Desirable to merge?

Comment 7 by mtklein@chromium.org, Jan 2 2018

Mergedinto: 795528
Status: Duplicate (was: Assigned)
I think this is https://bugs.chromium.org/p/chromium/issues/detail?id=795528.

That says it's probably too risky to merge back.
►

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