Bug 101101

Summary:

[chromium][CSS Regions] fast/regions/autoheight-definedheight-changenotdetected.html fails on MacOS 10.8

Product:

WebKit

Reporter:

Stephen White <senorblanco>

Component:

Layout and Rendering

Assignee:

Mihnea Ovidenie <mihnea>

Status:

RESOLVED WONTFIX

Severity:

Normal

CC:

donggwan.kim, eae, jchaffraix, leviw, mibalan, WebkitBugTracker, webkit.review.bot

Priority:

Keywords:

AdobeTracked

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Bug Depends on:

Bug Blocks:

57312

Attachments:

Description	Flags
Patch	rniwa: review+, rniwa: commit-queue-

Stephen White

Reported 2012-11-02 14:20:45 PDT

This reftest doesn't work on MacOS 10.8: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fregions%2Fautoheight-definedheight-changenotdetected.html

Attachments
Patch (1.36 KB, patch) 2012-11-03 13:55 PDT, Mihnea Ovidenie	rniwa: review+ rniwa: commit-queue-	Details Formatted Diff Diff
View All Add attachment proposed patch, testcase, etc.

Mihnea Ovidenie

Comment 1 2012-11-02 15:09:10 PDT

Already taken a look without being able to reproduce it, but i may have a potential fix for it.

Mihnea Ovidenie

Comment 2 2012-11-03 13:55:47 PDT

Created attachment 172226 [details] Patch I suspect turning off font-smoothing for the Ahem font used for content that is flowed into regions will fix the problem. I was not able to reproduce the problem on my ML machine.

Ryosuke Niwa

Comment 3 2012-11-04 01:43:03 PST

Comment on attachment 172226 [details] Patch I'm a bit skeptical but let's try that.

Ryosuke Niwa

Comment 4 2012-11-04 01:55:12 PST

Comment on attachment 172226 [details] Patch Looking at the actual result more closely, this might be a real bug in Chromium. Let's hold off on landing this. http://build.chromium.org/f/chromium/layout_test_results/WebKit_Mac10_8/results/layout-test-results/fast/regions/autoheight-definedheight-changenotdetected-actual.png

Ryosuke Niwa

Comment 5 2012-11-04 01:56:28 PST

Emil & Levi, Is 1px anti-aliasing showing up on the boxes on the left and the bottom right expected? I can't help but think that this is a real bug in Chromium on 10.8.

Emil A Eklund

Comment 6 2012-11-05 07:39:54 PST

(In reply to comment #5) > Emil & Levi, > > Is 1px anti-aliasing showing up on the boxes on the left and the bottom right expected? I can't help but think that this is a real bug in Chromium on 10.8. Depends on what the test is doing, hard to tell from the screenshot.

Mihnea Ovidenie

Comment 7 2012-11-05 08:04:18 PST

(In reply to comment #6) > (In reply to comment #5) > > Emil & Levi, > > > > Is 1px anti-aliasing showing up on the boxes on the left and the bottom right expected? I can't help but think that this is a real bug in Chromium on 10.8. > > Depends on what the test is doing, hard to tell from the screenshot. The test is using a 50px Ahem to create a green line. Independent of regions, i have noticed that a simple div using a 50px Ahem font has the same antialiasing, which is gone if one specifies -webkit-font-smoothing: none, hence my proposed fix for the test in Chromium.

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