Function glfwGetJoystickHats 

pub unsafe extern "C" fn glfwGetJoystickHats(
    jid: i32,
    count: *mut i32,
) -> *const u8

@brief Returns the state of all hats of the specified joystick.

This function returns the state of all hats of the specified joystick. Each element in the array is one of the following values:

Name	Value
GLFW_HAT_CENTERED	0
GLFW_HAT_UP	1
GLFW_HAT_RIGHT	2
GLFW_HAT_DOWN	4
GLFW_HAT_LEFT	8
GLFW_HAT_RIGHT_UP	GLFW_HAT_RIGHT | GLFW_HAT_UP
GLFW_HAT_RIGHT_DOWN	GLFW_HAT_RIGHT | GLFW_HAT_DOWN
GLFW_HAT_LEFT_UP	GLFW_HAT_LEFT | GLFW_HAT_UP
GLFW_HAT_LEFT_DOWN	GLFW_HAT_LEFT | GLFW_HAT_DOWN

The diagonal directions are bitwise combinations of the primary (up, right, down and left) directions and you can test for these individually by ANDing it with the corresponding direction.

@code if (hats[2] & GLFW_HAT_RIGHT) { // State of hat 2 could be right-up, right or right-down } @endcode

If the specified joystick is not present this function will return NULL but will not generate an error. This can be used instead of first calling @ref glfwJoystickPresent.

@param[in] jid The [joystick](@ref joysticks) to query. @param[out] count Where to store the number of hat states in the returned array. This is set to zero if the joystick is not present or an error occurred. @return An array of hat states, or NULL if the joystick is not present or an [error](@ref error_handling) occurred.

@errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref GLFW_INVALID_ENUM and @ref GLFW_PLATFORM_ERROR.

@pointer_lifetime The returned array is allocated and freed by GLFW. You should not free it yourself. It is valid until the specified joystick is disconnected, this function is called again for that joystick or the library is terminated.

@thread_safety This function must only be called from the main thread.

@sa @ref joystick_hat

@since Added in version 3.3.

@ingroup input