This function indirectly determines the amount of average audio latency, this is why changes to BitmapText can affect global offset significantly. Aim to make the function as fast as possible to minimize latency.
1) make BitmapText::DrawPrimitives noexcept
- note: RollingNumbers::DrawPrimitives has to also become noexcept as a consequence
2) Define repeated calculations as constexpr functions defined within an anonymous namespace
3) Fix some formatting stuff
- Remove checking for standard functions from the build system
- Prefix all invocations with std::
- Replace suffixed functions with unprefixed versions
- Include <cmath> in all files that use it and remove the global include
e.g. floorf(x) -> std::floor(x)
