[Webkit-unassigned] [Bug 229179] New: Some font doesn't render with font-variant-ligatures: none;

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Aug 16 23:02:18 PDT 2021


            Bug ID: 229179
           Summary: Some font doesn't render with font-variant-ligatures:
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: xidorn-webkit at upsuper.org
                CC: mmaxfield at apple.com

Created attachment 435665

  --> https://bugs.webkit.org/attachment.cgi?id=435665&action=review

font with problem

Steps to reproduce:
1. download the attached font file
2. create an HTML with the following code in the same directory and open it
<!DOCTYPE html>
  @font-face {
    font-family: "A";
    src: url(GilSBI30.woff);
  p {
    font: 90px/1 A;
    font-variant-ligatures: none;
<p><span>Hello world</span></p>
<p>Hello world</p>

Expected result:
It should render the text properly

Actual result:
The text is not rendered

It seems that the font has a bad font metrics with CoreText. In Safari 14, the first line wouldn't display even without `font-variant-ligatures: none;`, but this issue is fixed in the Technology Preview.

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