Enable freetype for windows

[ldhertert]

Enable freetype flag for windows and set the necessary compiler flags. Fixes #547 Canvas.Font on Windows.

While this "works on my machine", I'd recommend another couple people test it out prior to merging this.

[LinusU]

@ldhertert The build was failing for an unrelated issue which I have since fixed, could you please rebase on master and push again. This should trigger a new build 👍

[ldhertert]

@LinusU I'm assuming you'll be notified, but the build is now passing.

[LinusU]

Ehh, I think something strange happened with your pull request. It seems like it's including some of the later commits that is already in. Your branch is now 11 commits ahead and 15 commits behind Automattic:master.

Could you try rebasing by following roughly the following commands. Thank you.

git remote add upstream https://github.com/Automattic/node-canvas.git
git fetch upstream
git rebase upstream/master
git push --force

[deadbeef84]

I'm also interested in getting this merged, or alternatively #620. I have tried the changes from this patch, however I had some issues with a missing <unistd.h> being included from fontconfig. It seems this was addressed in #620 by introducing a dummy file, and it seems the library itself has a similar solution. Another solution would be to update the wiki, instructing the user to remove #include <unistd.h> from the fontconfig library. Let me know what you think and I can submit a new pull request with the appropriate changes.

[LinusU]

@zbjornson Since you are running Windows, would you mind testing this? Thanks!

[zbjornson]

No prob. As @deadbeef84 said, <unistd.h> is absent on Windows. cherry-picking 3p3r@6a47205 from #620 fixed it, then all tests pass. Although, I don't see many tests around font stuff. @ldhertert did you get this to work another way?

[LinusU]

#715 has been merged so I don't think that this is relevant no more? Please correct me if I'm wrong :)