The backends need to have no dependency on the engine, otherwise
there'll be conflicts when we do stuff like include `window.h` in a
file that also happens to include "WindowsWrapper.h" somewhere.
This commit changes which variables are static: the Mac (and
presumably the Linux) debug data tells you what variables are static,
by prefixing their names with double_underscores.
The variable names themselves also hint at this: global variables are
prefixed with 'g', and use upper-camelcase, while static variables
use whatever_you_call_this.
There's no evidence Tags.h contained these variables (if anything, it
appears that Pixel manually declared them in every file that used
them).
gg Pixel
Storytime: Cucky's original SDL2 port work involved using SDL2's
threading API to emulate the original WinAPI threading.
I can't be assed with that stuff, so I used the same trick Cucky did
for the Wii port, and hooked Organya up to the SDL2 audio callback.
This actually opens up the possibility for perfectly-synchronised
Organya playback. By that I mean, instead of needing a super
low-latency audio callback, I can have the callback synchronise its
audio mixing with Organya itself. I haven't done it yet, I plan to
soon.
Okay so WindowsWrapper.h now just includes Windows.h if it wants
non-portability. This meant I had to split the custom RECT struct
back to the original RECT and unknown nameless struct (one uses
left/right, while the other uses front/back).
