harfbuzz/README.mingw.md
Ebrahim Byagowi 6058ede3ae
Build win32 artifacts using meson
As a part of meson migration, this builds hb-shape dependencies
using meson subprojects and removes different unrelated mingw
files we've put on source root about things that aren't really our
concern. This also simplifies all the instructions we've put in
README.mingw.md and makes it easy to build the project on
distros that no mingw libraries (such i686-win32-{freetype,glib,...}
are packaged. The known catch is however lack of hb-view as its need
for build of cairo which apparently isn't that straightforward.
2020-06-01 12:58:31 +04:30

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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:
1. Install Wine from your favorite package manager. On Fedora that's `dnf install wine`.
2. And `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. Use `apt install g++-mingw-w64` on Debian.
3. See how `.ci/build-win32.sh` uses meson or run that script anyway.
Now you can use hb-shape by `(cd win32build/harfbuzz-win32 && wine hb-shape.exe)`
but if you like to shape with the Microsoft Uniscribe,
4. 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](https://en.wikipedia.org/wiki/Uniscribe)).
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,
5. `WINEDLLOVERRIDES="usp10=n" wine hb-shape.exe fontname.ttf -u 0061,0062,0063 --shaper=uniscribe`
(`0061,0062,0063` means `abc`, use test/shaping/hb-unicode-decode to generate ones you need)