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Issue 659121 link

Starred by 2 users
Status: Fixed
Owner:
drott@chromium.org
Closed: May 2018
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug



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Font rendering issue for Thai vowels sala u, sala uu, sala i, sala ii (short and long "U" and "I")

Reported by kristof...@gmail.com, Oct 25 2016 
Chrome Version       : 55.0.2883.21
OS Version: 10.0
URLs (if applicable) :
1) http://womenlearnthai.com/index.php/finding-the-tone-of-a-thai-syllable/#comment-194294
2) https://twitter.com/KristoferA/status/790906251878076416

Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:

  Firefox 49: OK
     Edge 38: OK

What steps will reproduce the problem?
1. Load a page with certain Thai vowels with a non-Thai consonant placeholder.
2. Vowel is not rendered in Chrome, but is rendered in other browsers

What is the expected result?

=>See attached screenshots

What happens instead of that?

=> TH vowels are not rendered.

Please provide any additional information below. Attach a screenshot if
possible.

UserAgentString: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.21 Safari/537.36
fiddler.png
54.6 KB View Download
firefox.png
66.7 KB View Download
edge.png
67.0 KB View Download
chrome54.png
77.6 KB View Download
chrome56.png
76.6 KB View Download

Comment 1 by elawrence@chromium.org, Oct 25 2016

Components: Blink>Fonts
Labels: -Pri-3 Pri-2
Status: Untriaged (was: Unconfirmed)
Confirmed on Win7.

If you copy the text out of Chrome and paste it to another application, the text renders as expected. If you right-click on the selected text, the character appears correctly in the context menu. If you manually use the Developer Tools to specify a Unicode font with broad coverage (e.g. Tahoma), the text renders.

Text renders correctly by default in IE and Firefox.

Comment 2 by e...@chromium.org, Oct 25 2016

Owner: e...@chromium.org
Status: Assigned (was: Untriaged)

Comment 3 by e...@chromium.org, Nov 1 2016

Owner: drott@chromium.org
It should fallback to Tahoma (as the dedicated fallback font for USCRIPT_THAI) but do the non-Thai consonant it does not and instead goes all the way back to the last-resort (Arial) which doesn't have the Thai glyph.

A workaround while we fix this is to change the font-family to add Tahoma to the end.

Comment 4 by e...@chromium.org, May 21 2018

Status: Fixed (was: Assigned)
Renders correctly in M68 on win10 and win7.
►

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