[Matplotlib-devel] win/arm64 build with latest FreeType

[Niyas Sait]

Hello,

I've been looking at porting matplotlib for windows on arm64 targets.

I've built matplotlib with static library built from the trunk of FreeType
(arm64 support is not yet on any releases). I can build without any issues
but when I try to run the unit tests some of the tests are failing due to
some small delta between the expected and actual image produced.

My first guess was the FreeType version difference and I have done an
experiment on an x64 windows machine to confirm it. And it looks like all
tests pass with the default FreeType version 2.6.1 but if I use the trunk
unit tests fail on x64 as well.

I guess we will need to update the reference image for the new version of
FreeType. Could someone provide guidance on how to do that locally so that
I can test if the win/arm64 build is working as expected ?

Also, the next release of FreeType (2.12) would have arm64 support, and I
wonder if anyone anticipates any particular issues with adding support for
the new FreeType release.

Thanks,
Niyas
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