1639813 - Missing glyphs in font from pdf2htmlex converter in Mac OS 10.15

Status: RESOLVED FIXED

(Core :: Graphics: Text, defect)

Description

[Joanna]

Attachment: normal.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36

Steps to reproduce:

open https://d32j6uwsrra4gx.cloudfront.net/dyna_questions/ks_2016/elementary/106_s1/106%E5%BA%B7%E8%BB%92%E7%89%88%E6%95%B8%E5%AD%B83%E4%B8%8A%201%2010000%E4%BB%A5%E5%85%A7%E7%9A%84%E6%95%B8_5_0.html

Actual results:

it shows irrelative symbols or characters
it occurred on chrome too
https://bugs.chromium.org/p/chromium/issues/detail?id=1072921
they have a work around

Expected results:

see the attached normal.png

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Jonathan Kew [:jfkthame]]

Based on the info in the chromium bug, I think the easiest way forward here would be to make the OpenType Sanitizer apply stricter validation to the characters in the PostScript name. If we limit it to URI-safe codepoints, then "unusual" names such as in this resource will be dropped and replaced by OTS's placeholder name, and the font then works on macOS.

I've opened https://github.com/khaledhosny/ots/pull/207 to add this capability to OTS, under control of the client application; once that is accepted, we can use it in Gecko to resolve this problem.

Comment 3

[Jonathan Kew [:jfkthame]]

Attachment: Bug 1639813 - Update OTS to upstream commit 6300460f76dbf1554a59dc1f20f52d5c2f5641e6 to clean up weird PSname that makes Core Text fail. r=lsalzman

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/f8b708650d9a
Update OTS to upstream commit 6300460f76dbf1554a59dc1f20f52d5c2f5641e6 to clean up weird PSname that makes Core Text fail. r=lsalzman

Comment 5

[Atila Butkovits]

https://hg.mozilla.org/mozilla-central/rev/f8b708650d9a

Comment 6

[Joanna]

Thank you very much.