For the development of HarfBuzz, the Microsoft shaping technology, Uniscribe, as a widely used and tested shaper is used as more-or-less OpenType reference implementation and that specially is important where OpenType specification is or wasn't that clear. For having access to Uniscribe on Linux/macOS these steps are recommended:
Install Wine from your favorite package manager. On Fedora that's
dnf install wine.
mingw-w64 compiler. With
brew on macOS, you can have it like
brew install mingw-w64. On Fedora, with
dnf install mingw32-gcc-c++, or
dnf install mingw64-gcc-c++ for the 64-bit Windows.
Install cross-compiled dependency packages. Alternatively see [^1] below. On Fedora that would be
dnf install mingw32-glib2 mingw32-cairo mingw32-freetype for 32-bit, or
dnf install mingw64-glib2 mingw64-cairo mingw64-freetype for 64-bit.
NOCONFIGURE=1 ./autogen.sh && mkdir winbuild && cd winbuild
../mingw32.sh for 32-bit build, or
../mingw64.sh for 64-bit. This configures HarfBuzz for cross-compiling. It enables Uniscribe backend as well.
Now you can use hb-shape using
wine util/hb-shape.exe but if you like to shape with the Microsoft Uniscribe,
Bring a 32bit version of
usp10.dll for yourself from
C:\Windows\SysWOW64\usp10.dll of your Windows installation (assuming you have a 64-bit installation, otherwise
C:\Windows\System32\usp10.dll) that it is not a DirectWrite proxy (for more info). Rule of thumb, your
usp10.dll should have a size more than 500kb, otherwise it is designed to work with DirectWrite which Wine can't work with its original one. You want a Uniscribe from Windows 7 or older.
Put the DLL in the folder you are going to run the next command,
WINEDLLOVERRIDES="usp10=n" wine util/hb-shape.exe fontname.ttf -u 0061,0062,0063 --shaper=uniscribe
abc, use test/shaping/hb-unicode-decode to generate ones you need)
[^1] Download and put this in your
~/.local/i686-w64-mingw32. Then replace all the instances of
<$HOME>/.local/i686-w64-mingw32 on that folder. (
<$HOME> replace it with
/Users/XXX on macOS) You shouldn't replace the instances of those inside binary files.