Bug 36596

Summary:

ZWJ does not join glyphs properly

Product:

WebKit

Reporter:

David Yonge-Mallo <davinci>

Component:

WebCore Misc.

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED CONFIGURATION CHANGED

Severity:

Normal

CC:

ap, daniel, karlcow, mitz, s.dasun

Priority:

Version:

528+ (Nightly build)

Hardware:

All

OS:

All

Attachments:

Description	Flags
Test case and expected output for Safari	none
test case	none

David Yonge-Mallo

Reported 2010-03-25 07:14:39 PDT

Created attachment 51637 [details] Test case and expected output for Safari The zero-width joiner (ZWJ) does not join glyphs properly in the complex font path. (It is ignored in the simple font path: see <a href="https://bugs.webkit.org/show_bug.cgi?id=16131">bug 16131</a>.) Safari (4.0.5, 5531.22.7) does not do the shaping at all. Chromium on Linux does the shaping correctly, but incorrectly displays the ZWJ glyph between the joined characters.

Attachments
Test case and expected output for Safari (15.50 KB, application/x-gzip) 2010-03-25 07:14 PDT, David Yonge-Mallo	no flags	Details
test case (1.54 KB, text/html) 2010-03-25 15:44 PDT, Alexey Proskuryakov	no flags	Details
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.

Alexey Proskuryakov

Comment 1 2010-03-25 15:44:26 PDT

Created attachment 51685 [details] test case Same test as an attachment for easier viewing.

dasun sameera weerasinghe

Comment 2 2013-03-15 00:30:27 PDT

Same issue, I've tested on QWebView, Everything render correctly except text with ZWJ, but Google chrome display them correctly. I've tested on Windows 7(32 bit) & 8(64 bit) Environment: Qt 5.0.1 (mingw47_32)

dasun sameera weerasinghe

Comment 3 2014-03-11 00:50:36 PDT

It is still reproducible in qt 5.2.1 too.

Karl Dubost

Comment 4 2024-02-08 00:44:24 PST

This seems to pass everywhere right now in STP 188, Firefox Nightly and Chrome Canary

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