Add XInput support

Provide support for XInput mappings.

CMakeLists.txt

@@ -18,7 +18,7 @@ add_definitions(
   -DIZ_APP_NAME="Izanagi"
   -DIZ_APP_DESCRIPTION="Run and gun game"
   -DIZ_APP_SERVER_DESCRIPTION="Dedicated server"
-  -DIZ_PLAYERS=2
+  -DIZ_PLAYERS=1
 )
 
 if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")

src/packages/game/input/IZ_joystick.c

@@ -26,6 +26,38 @@ void IZ_JoystickHandleDeviceEvents(IZ_JoystickState* state, SDL_Event e) {
 
 void IZ_JoystickHandleAxisEvents(IZ_JoystickState* state, IZ_Action* action, SDL_Event e) {
 	if (e.type == SDL_JOYAXISMOTION) {
+		// XInput handling
+		u8 control_index;
+		for (control_index = 4; control_index < IZ_CONTROLS; control_index += 1) {
+			if (e.jaxis.axis == IZ_JOY_AXIS_DIRECTION_LEFT_SHOULDER && state->config.control_mapping[control_index] == 10) {
+				const u16 bitflag = (0x1 << control_index);
+
+				if (e.jaxis.value > state->config.axis_threshold) {
+					*action |= bitflag;
+					return;
+				}
+
+				if (e.jaxis.value <= state->config.axis_threshold) {
+					*action &= ~bitflag;
+					return;
+				}
+			}
+
+			if (e.jaxis.axis == IZ_JOY_AXIS_DIRECTION_RIGHT_SHOULDER && state->config.control_mapping[control_index] == 11) {
+				const u16 bitflag = (0x1 << control_index);
+
+				if (e.jaxis.value > state->config.axis_threshold) {
+					*action |= bitflag;
+					return;
+				}
+
+				if (e.jaxis.value <= state->config.axis_threshold) {
+					*action &= ~bitflag;
+					return;
+				}
+			}
+		}
+
 		if (
 			e.jaxis.axis == IZ_JOY_AXIS_DIRECTION_HORIZONTAL1
 			|| e.jaxis.axis == IZ_JOY_AXIS_DIRECTION_HORIZONTAL2
@@ -72,6 +104,7 @@ void IZ_JoystickHandleHatEvents(IZ_Action* action, SDL_Event e) {
 
 void IZ_JoystickHandleButtonEvents(IZ_JoystickState* state, IZ_Action* action, SDL_Event e) {
 	u8 control_index;
+
 	for (control_index = 4; control_index < IZ_CONTROLS; control_index += 1) {
 		if (e.jbutton.button == state->config.control_mapping[control_index]) {
 			const u16 bitflag = (0x1 << control_index);

src/packages/game/input/IZ_joystick.h

@@ -15,8 +15,10 @@ static const u16 IZ_DEFAULT_AXIS_THRESHOLD = 8000;
 typedef enum {
 	IZ_JOY_AXIS_DIRECTION_HORIZONTAL1 = 0,
 	IZ_JOY_AXIS_DIRECTION_VERTICAL1 = 1,
-	IZ_JOY_AXIS_DIRECTION_HORIZONTAL2 = 3,
-	IZ_JOY_AXIS_DIRECTION_VERTICAL2 = 4,
+	IZ_JOY_AXIS_DIRECTION_HORIZONTAL2 = 2,
+	IZ_JOY_AXIS_DIRECTION_VERTICAL2 = 3,
+	IZ_JOY_AXIS_DIRECTION_LEFT_SHOULDER = 4,
+	IZ_JOY_AXIS_DIRECTION_RIGHT_SHOULDER = 5,
 } IZ_JoyAxisDirection;
 
 typedef struct {