[Webkit-unassigned] [Bug 228927] New: [FreeType] Remove yucky strong alias computations in font fallback code
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Aug 9 15:35:47 PDT 2021
https://bugs.webkit.org/show_bug.cgi?id=228927
Bug ID: 228927
Summary: [FreeType] Remove yucky strong alias computations in
font fallback code
Product: WebKit
Version: WebKit Nightly Build
Hardware: PC
OS: Linux
Status: NEW
Severity: Normal
Priority: P2
Component: WebKitGTK
Assignee: webkit-unassigned at lists.webkit.org
Reporter: mcatanzaro at gnome.org
CC: bugs-noreply at webkitgtk.org
In bug #147057 I added a bunch of copypasted code from Skia that performs black magic to sort font patterns in order to guess whether one font is strongly-aliased to another. In https://bugs.freedesktop.org/show_bug.cgi?id=19375 Fontconfig added a new FcPatternGetWithBinding() API to do this directly. It has been four years now, so in theory we can now remove all the yucky code and use FcPatternGetWithBinding() instead. I've attached a patch that does exactly that.
Problem is, my patch doesn't work at all. For some reason, FcPatternGetWithBinding() reports that *every* binding is a strong binding, so now every match performed by Fontconfig is accepted, which is not what we want. I will ask the Fontconfig developers if I'm doing something obviously wrong.
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