[Bug 51346] New: x264guiEx partly shows white box characters when using Wine-Mono (default encoding issue with C++/CLI).

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51346

Bug ID: 51346
           Summary: x264guiEx partly shows white box characters when using
                    Wine-Mono (default encoding issue with C++/CLI).
           Product: Wine
           Version: 6.11
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: mscoree
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: Ubuntu

Created attachment 70202
  --> https://bugs.winehq.org/attachment.cgi?id=70202
x264guiEx configuration window

x264guiEx[1] is a famous output plugin for AviUtl, Japanese video editing
software[2]. When running it with AviUtl 1.10 and Wine-Mono 6.20, its
configuration window partly shows white box characters instead of Japanese
characters. See attached image for details.

It's not typeface issue. For the attachment case, it shows three white boxes
for two Japanese characters, なし. If we had have a missing typeface, it should
be two.

I guess Wine-Mono's default encoding incompatibility causes this issue. This
plugin uses System::String without the encoding parameter in frmConfig.cpp[3].
That means constructor's argument is interpreted using default encoding[4].

[1] https://github.com/rigaya/x264guiEx
[2] http://spring-fragrance.mints.ne.jp/aviutl/
[3]
https://github.com/rigaya/x264guiEx/blob/9f1abe0f44be3c602ffa938e2ca7d80cea4...
[4]
https://docs.microsoft.com/en-us/dotnet/api/system.string.-ctor?view=net-5.0...