Fields
- window: Window_Type
- window_width: s32
- in window coordinate units (what the application draws in)
- window_height: s32
- in window coordinate units (what the application draws in)
- pixel_scale: float
- device pixels per unit; the framebuffer is window size times this
- wanted_msaa: s32
- msaa: s32
- backend_initted_for_this_window: := false
- specific: Window_Info_Platform_Specific