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Issue 702115 link

Starred by 1 user
Status: ExternalDependency
Owner: ----
Cc:
ajha@chromium.org
█ kavvaru@chromium.org
█ brajkumar@chromium.org
█ karloygard@chromium.org
e...@chromium.org
█ durga.behera@chromium.org
dpa...@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 3
Type: Bug-Regression



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Regression: paper-slider's knob renders weirdly at certain zoom levels

Project Member Reported by ratnavar...@techmahindra.com, Mar 16 2017 
Chrome Version:59.0.3043.0 dev
OS:Ubuntu 14.04,Windows

What steps will reproduce the problem?
(1)Launch chrome and go to chrome://md-settings/fonts
(2)Now zoom the page to 80% and Observe the blue focus on resizing scale(kindly refer video)

Actual:Weird shaped focus are seen when page is zoomed-out to 80%
Expected:Instead,focus should be circular when page is zoomed-out to 80%.

This is a Regression issue broken in M-58
Manual Bisect Info:
===================
Good Build:58.0.3010.0 dev
Bad build :58.0.3012.0 dev
Actual.ogv
802 KB View Download
Expected.ogv
823 KB View Download
ACtual.png
12.4 KB View Download

Comment 1 by msrchandra@chromium.org, Mar 16 2017

Labels: -Needs-Bisect hasbisect-per-revision Proj-MaterialDesign-WebUI
Owner: ka...@opera.com
Status: Assigned (was: Unconfirmed)
Using the per-revision bisect providing the bisect results,
Good build:58.0.3010.0 (Revision:449855).
Bad build:58.0.3012.0 (Revision:450199).

You are probably looking for a change made after 449942 (known good), but no later than 449943 (first known bad).
CHANGELOG URL:
  https://chromium.googlesource.com/chromium/src/+log/d6df828820be4b0f22b9bed959fb2bd93f84b331..934becac5daa91ea979fb66e4ae21761ca11ebc9

@karlo -- Could you please look into the issue, pardon me if it has nothing to do with your changes and if possible please assign it to concern owner.
Thank You.

Comment 2 by ajha@chromium.org, Mar 16 2017

Labels: OS-Mac
Issue is reproducible on the latest canary(59.0.3043.0) on Mac OS 10.12.3 as well.

Comment 3 by dbeam@chromium.org, Mar 27 2017

Cc: e...@chromium.org
Labels: -Pri-1 -M-59 Hotlist-MD-Settings-General Pri-3
Summary: Regression: paper-slider's knob renders weirdly at certain zoom levels (was: Regression:Blue focus is seen weird on fonts page when zoomed.)
this is a problem in paper-slider's knob (which probably uses border-radius and is having subpixel rounding errors)

Comment 4 by e...@chromium.org, Mar 27 2017

Cc: ka...@opera.com
Owner: ----
Status: Untriaged (was: Assigned)
Scaling a float (4.3px) versus an integer (4px) by applying a zoom factor will result in a slightly different rendering. This is not a bug nor a regression as far as layout is concerned.

If you prefer the knobs to be slightly larger or have a different slant please adjust the radius or size of the border now that they're no longer floored.

Thanks!

Comment 5 by tbuck...@chromium.org, Apr 3 2017

Owner: dbeam@chromium.org
Status: ExternalDependency (was: Untriaged)
@dbeam can you file a bug on Polymer's paper-slider?

Comment 7 by ka...@opera.com, Apr 4 2017 

The problem is that a block element is used for the knob.  Its size can be affected by subpixel positioning, which is the case when the user zooms the document.

In the attached test case, both divs have identical computed style (roughly equivalent to the problematic page), but subpixel positioning causes the last div to be smaller and get a strange square look.

This issue predates the cl.
squarebutton.html
218 bytes View Download

Comment 8 by esprehn@chromium.org, Apr 4 2017 

What does <video controls> do for the circle? What does this look like in other browsers?

Comment 9 by dbeam@chromium.org, Apr 4 2017 

esprehn@: it uses -webkit-appearance: sliderthumb-horizontal; and is just a little bit off in new, fun, exciting ways!

it just centers incorrectly on the slider's track (at 90% zoom it's too high, for instance)
2017-04-04-131130_928x396_scrot.png
109 KB View Download
2017-04-04-131043_535x57_scrot.png
3.3 KB View Download
2017-04-04-131037_442x46_scrot.png
2.5 KB View Download

Comment 10 by dbeam@chromium.org, Jul 6 2017

Owner: ----
I'm no longer working on Chrome, and unlikely to fix any bug I'm currently assigned.

So this bug doesn't languish, I'm unassigning myself.

Comment 11 by ka...@opera.com, Feb 28 2018

Cc: -ka...@opera.com karloygard@chromium.org
►

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