Now that we’re making Splash support iOS as well as
Mac + Linux, we need to create some nice abstractions
to make sure that we can share as much code as possible
between all platforms.
- Define Font.Loaded and Color.Renderable as platform-
specific typealiases for system fonts and colors.
- Don’t compile in non-Linux compatible code when building
for Linux.
- Make Font and Color handle all conversion themselves, so
that AttributedStringOutputFormat can be kept more clean.
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