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fonts: Add support for more @font-face features (#32164)

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There are a couple major changes here:

1. Support is added for the `weight`, `style`, `stretch` and
   `unicode-range` declarations in `@font-face`.
2. Font matching in the font cache can return templates and
   `FontGroupFamily` can own mulitple templates. This is due to needing
   support for "composite fonts". These are `@font-face` declarations
   that only differ in their `unicode-range` definition.

This fixes a lot of non-determinism in font selection especially when
dealing with pages that define "composite faces." A notable example of
such a page is servo.org, which now consistently displays the correct
web font.

One test starts to fail due to an uncovered bug, but this will be fixed
in a followup change.

Fixes #20686.
Fixes #20684.

Co-authored-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This commit is contained in:
Martin Robinson 2024-04-29 19:02:07 +02:00 • committed by GitHub
parent 628e33bfa9
commit 4732da3477
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56 changed files with 613 additions and 593 deletions
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2
tests/wpt/meta/css/css-values/ex-unit-001.html.ini
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@ -1,2 +0,0 @@
[ex-unit-001.html]
expected: FAIL

2
tests/wpt/meta/css/css-values/ex-unit-004.html.ini
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@ -1,2 +0,0 @@
[ex-unit-004.html]
expected: FAIL