[Webkit-unassigned] [Bug 260196] New: Full hinting broken by subpixel positioning

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=260196

            Bug ID: 260196
           Summary: Full hinting broken by subpixel positioning
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ossman at cendio.se
                CC: mmaxfield at apple.com

Modern versions of Epiphany have random blurry text if the system is configured with full hinting (and you are using strongly hinted fonts). This issue has been reported to some other places already:

https://bugzilla.redhat.com/show_bug.cgi?id=1999078
https://gitlab.freedesktop.org/cairo/cairo/-/issues/511

The problem might be with how WebKit uses cairo, though, not in cairo itself.

GTK has also struggled with this issue:

https://gitlab.gnome.org/GNOME/gtk/-/issues/3787

Right now, they seem to have landed in disabling sub-pixel positioning for standard DPI displays:

https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/6190

Hopefully, something similar can be done in WebKit?

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