[Webkit-unassigned] [Bug 182042] 'vert' font feature is not enabled in vertical text

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Mar 7 15:32:07 PST 2018


Chris Lilley <chris at w3.org> changed:

           What    |Removed                     |Added
                 CC|                            |chris at w3.org

--- Comment #2 from Chris Lilley <chris at w3.org> ---
Steps to reproduce the problem:
1. Go to https://test.csswg.org/harness/test/css-fonts-3_dev/single/font-kerning-03/format/html5/
2. Compare test result to reference page (linked from the above url)

Firefox passes the test correctly. WebKit, Edge and Chrome do not

Spec text:
" When rendering with OpenType fonts, the [OPENTYPE] specification suggests that kerning be enabled by default. When kerning is enabled, the OpenType kern feature is enabled (for vertical text runs the vkrn feature is enabled instead)."

WebKit passes the equivalent test for horizontal text (with the `kern` feature; the bug is just in vertical text. This looks like a simple oversight.

The test case is in web platform tests, in CSS/css-fonts/font-kerning-03.html and the reference is font-kerning-03-ref.html


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