Add XInput implementation of GetDPadAxis, GetLeftTriggerNormalized, GetRightTriggerNormalized.

src/platform/windows/jstick_xinput.cpp

@@ -10,6 +10,7 @@
 // TODO: Keep prev_state, so we can fire Events when buttons are pressed/releaed, etc.
 
 #define MAX_DEVICES 4
+#define SHORT_RANGE 32768.f;
 
 bool device_exists[MAX_DEVICES];
 XINPUT_STATE cur_state[MAX_DEVICES];
@@ -21,6 +22,25 @@ bool jstick::Cleanup() { return true; }
 
 void jstick::JoystickServiceUpdate() { }
 
+Vector2 jstick::GetDPadAxis(float deadzone, int hwid)
+{
+	// "Synthesize" a DPad vector based upon whether the buttons are pressed.
+	// This vector will not be analog as is the case with the linux/jsdev implementation.
+	Vector2 dpad;
+
+	if (IsButtonDown(XBoxButton::DPadDown))
+		dpad.y += SHORT_RANGE;
+	if (IsButtonDown(XBoxButton::DPadRight))
+		dpad.x += SHORT_RANGE;
+	if (IsButtonDown(XBoxButton::DPadLeft))
+		dpad.x -= SHORT_RANGE;
+	if (IsButtonDown(XBoxButton::DPadUp))
+		dpad.y -= SHORT_RANGE;
+
+	return dpad;
+
+}
+
 /// XInput treats the DPad as buttons.
 bool jstick::GetDPadIsAxisOrButtons() { return false; }
 
@@ -144,6 +164,15 @@ Vector2 jstick::GetLeftThumbstickAxisNormalized(float deadzone, int hwid)
 
 
 
+float jstick::GetLeftTriggerNormalized(int hwid) {
+	return GetLeftTrigger(hwid) / SHORT_RANGE;
+}
+
+float jstick::GetRightTriggerNormalized(int hwid) {
+	return GetRightTrigger(hwid) / SHORT_RANGE;
+}
+
+
 bool jstick::IsButtonDown(const XBoxButton& btn, int hwid)
 {
 	XINPUT_STATE state;