Fixed bug 2024 - Update OSX Joystick code to fully support Saitek p2500 gamepad

Patrick Maloney

Saitek p2500 (Cyborg Rumble Force Pad) has a D-pad, two analog sticks, and numerous buttons.  SDL 2.x on OSX detected everything except the right-side analog stick.  The right-side stick is considered a 'simulation device' with the axes mapped to throttle and rudder.

The patch adds support for throttle and rudder on the HID simulation page.

src/joystick/darwin/SDL_sysjoystick.c

@@ -362,6 +362,22 @@ HIDAddElement(CFTypeRef refElement, recDevice * pDevice)
                         }
                     }
                     break;
+                case kHIDPage_Simulation:
+		    switch (usage) {
+			case kHIDUsage_Sim_Rudder:
+			case kHIDUsage_Sim_Throttle:
+                            element = (recElement *)
+                                NewPtrClear(sizeof(recElement));
+                            if (element) {
+                                pDevice->axes++;
+                                headElement = &(pDevice->firstAxis);
+                            }
+			    break;
+
+			default:
+			    break;
+		    }
+                    break;
                 case kHIDPage_Button:
                     element = (recElement *)
                         NewPtrClear(sizeof(recElement));