1060791 - support OpenType cmap subtable format 10

Status: VERIFIED FIXED

(Core :: Graphics: Text, defect)

Description

[Jonathan Kew [:jfkthame]]

This subtable format is used, for example, by the Apple Symbols font on OS X. Because Gecko doesn't support it, we fail to use the expected font for an example like

  data:text/html,<div style="font-family:apple symbols">&%23x25ce;&%23x1d330;

Here, the first character falls back to a different font (a Hiragino face, in my case, though YMMV), and the second renders a hexbox as there is no other font that supports the Tai Xuan Jing symbols on a default OS X install.

Comment 1

[Jonathan Kew [:jfkthame]]

Attachment: reftest for support of Apple Symbols font.

Here's a reftest that fails on current trunk, due to our inability to use the Apple Symbols font.

Comment 2

[Jonathan Kew [:jfkthame]]

Attachment: support cmap subtable format 10, for the Apple Symbols font.

And a patch that adds support for format 10 subtables.

Comment 3

[Jonathan Kew [:jfkthame]]

Tryserver run: https://tbpl.mozilla.org/?tree=Try&rev=beb5bb32ac2b.

For an example of a page affected by this, see https://mathiasbynens.be/notes/es6-unicode-regex. This has a number of instances of U+1D306 TETRAGRAM FOR CENTRE, which is only available in Apple Symbols on OS X with just the default platform fonts installed.

Comment 4

[Jonathan Kew [:jfkthame]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/ae076288ac1b
https://hg.mozilla.org/integration/mozilla-inbound/rev/f67b22d1d322

Comment 5

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/mozilla-central/rev/ae076288ac1b
https://hg.mozilla.org/mozilla-central/rev/f67b22d1d322

Comment 6

[Florian Bender]

Verified on https://mathiasbynens.be/notes/es6-unicode-regex with Nightly 35.0a1 (2014-09-06) WFM.
Does not work on Aurora 34.0a2 (2014-09-06) as expected, shows hexbox instead.


Thanks a lot for the quick turnaround! I guess this will not be uplifted to Aurora?