Returns whether raw mouse motion is supported.
This function returns whether raw mouse motion is supported on the current
system. This status does not change after GLFW has been initialized so you
only need to check this once. If you attempt to enable raw motion on
a system that does not support it,
GLFW_PLATFORM_ERROR will be emitted.
Raw mouse motion is closer to the actual motion of the mouse across a surface. It is not affected by the scaling and acceleration applied to the motion of the desktop cursor. That processing is suitable for a cursor while raw motion is better for controlling for example a 3D camera. Because of this, raw mouse motion is only provided when the cursor is disabled.
GLFW_TRUEif raw mouse motion is supported on the current machine, or