[Webkit-unassigned] [Bug 213008] [Win] Stop using MLang font linking for system font fallback

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=213008

--- Comment #2 from Fujii Hironori <Hironori.Fujii at sony.com> ---
I realised an unexpected behavior change in the WIP patch.

Windows has two types of code pages, ANSI code page and OEM code page.
https://en.wikipedia.org/wiki/Windows_code_page

The current implementation chooses a CJK font depending on ANSI code page by getting LOCALE_IDEFAULTANSICODEPAGE.
https://trac.webkit.org/browser/webkit/trunk/Source/WebCore/platform/graphics/win/FontCacheWin.cpp?rev=261013#L170

On the other hand, the WIP patch depends on OEM code page.
This font fallback behavior is same with normal Windows apps, for example notepad.exe.

ANSI code page can be changed by
Control Panel → Region → Format

OEM code page can be changed by
Control Panel → Region → Admistative → Change System Locale...

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