Bug 186366

Summary:	[Cocoa] Allow app-bundled fonts to work in WKWebView
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	Text	Assignee:	Brady Eidson <beidson>
Status:	NEW ---
Severity:	Normal	CC:	ap, mmaxfield, sam, simon.fraser, webkit-bug-importer, yousuke.igarashi
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Simon Fraser (smfr) 2018-06-06 15:48:51 PDT

Trying to load a custom font (which starts off encrypted) by creating a CGFontRef with CGFontCreateWithDataProvider(), then registering it in the app with CGFontManagerRegisterGraphicsFont().

The CSS landed in the WKWebView references the font just via font-family, but this doesn't work.

We tried adding the font to the info.plist (under "Fonts provided by application") but this didn't' work (not clear if this is the PostScript name or the full name).

It seems like a 3rd party app should be able to do this. What's the best way?

Comment 1 Myles C. Maxfield 2018-06-18 15:37:03 PDT

iOS or macOS?

Comment 2 Myles C. Maxfield 2018-06-18 15:40:15 PDT

Are you sure you don't mean CTFontManagerRegisterGraphicsFont?

Comment 3 Myles C. Maxfield 2018-06-18 15:45:58 PDT

CTFontManagerRegisterGraphicsFont only registers it for the current process.

On macOS, there are tons of ways to register a font for multiple processes. On iOS, the current only way is with a configuration profile.

I do agree that it should be easier for an iOS application to register a font for its own process and the associated web processes, but not for unrelated other app processes.

Comment 4 Simon Fraser (smfr) 2018-06-19 15:31:10 PDT

iOS. And I do mean CGFontManagerRegisterGraphicsFont.

Comment 5 Simon Fraser (smfr) 2018-06-20 08:39:12 PDT

Oh, maybe I did mean CTFontManagerRegisterGraphicsFont(). I was confused by the fact that it takes a CGFontRef.

Comment 6 Radar WebKit Bug Importer 2018-06-20 16:50:20 PDT

<rdar://problem/41310405>

Comment 7 Myles C. Maxfield 2018-06-20 21:28:48 PDT

<rdar://problem/33725014>

Comment 8 Myles C. Maxfield 2018-06-26 14:34:14 PDT

<rdar://problem/20244953>