From aad340eb862ef2707bfe220fba113732a563344a Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 15 Aug 2018 19:53:36 -0700
Subject: [PATCH] Added Windows Xbox controller state packet handling, for
 completeness.

---
 src/joystick/hidapi/SDL_hidapi_xbox360.c | 93 ++++++++++++++++++++++++
 1 file changed, 93 insertions(+)

diff --git a/src/joystick/hidapi/SDL_hidapi_xbox360.c b/src/joystick/hidapi/SDL_hidapi_xbox360.c
index 8411121ff..2aa433658 100644
--- a/src/joystick/hidapi/SDL_hidapi_xbox360.c
+++ b/src/joystick/hidapi/SDL_hidapi_xbox360.c
@@ -261,6 +261,99 @@ HIDAPI_DriverXbox360_Rumble(SDL_Joystick *joystick, hid_device *dev, void *conte
     return 0;
 }
 
+#if 0
+ /* This is the packet format for Xbox 360 and Xbox One controllers on Windows,
+    however with this interface there is no rumble support, no guide button,
+    and the left and right triggers are tied together as a single axis.
+  */
+static void
+HIDAPI_DriverXboxOne_HandleStatePacket(SDL_Joystick *joystick, hid_device *dev, SDL_DriverXbox360_Context *ctx, Uint8 *data, int size )
+{
+    Sint16 axis;
+
+    if (ctx->last_state[10] != data[10]) {
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_A, (data[10] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_B, (data[10] & 0x02) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_X, (data[10] & 0x04) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_Y, (data[10] & 0x08) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSHOULDER, (data[10] & 0x10) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER, (data[10] & 0x20) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_BACK, (data[10] & 0x40) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_START, (data[10] & 0x80) ? SDL_PRESSED : SDL_RELEASED);
+    }
+
+    if (ctx->last_state[11] != data[11]) {
+        SDL_bool dpad_up = SDL_FALSE;
+        SDL_bool dpad_down = SDL_FALSE;
+        SDL_bool dpad_left = SDL_FALSE;
+        SDL_bool dpad_right = SDL_FALSE;
+
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSTICK, (data[11] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSTICK, (data[11] & 0x02) ? SDL_PRESSED : SDL_RELEASED);
+
+        switch (data[11] & 0x3C) {
+        case 4:
+            dpad_up = SDL_TRUE;
+            break;
+        case 8:
+            dpad_up = SDL_TRUE;
+            dpad_right = SDL_TRUE;
+            break;
+        case 12:
+            dpad_right = SDL_TRUE;
+            break;
+        case 16:
+            dpad_right = SDL_TRUE;
+            dpad_down = SDL_TRUE;
+            break;
+        case 20:
+            dpad_down = SDL_TRUE;
+            break;
+        case 24:
+            dpad_left = SDL_TRUE;
+            dpad_down = SDL_TRUE;
+            break;
+        case 28:
+            dpad_left = SDL_TRUE;
+            break;
+        case 32:
+            dpad_up = SDL_TRUE;
+            dpad_left = SDL_TRUE;
+            break;
+        default:
+            break;
+        }
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_DOWN, dpad_down);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_UP, dpad_up);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_RIGHT, dpad_right);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_LEFT, dpad_left);
+    }
+
+    axis = (int)*(Uint16*)(&data[0]) - 0x8000;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTX, axis);
+    axis = (int)*(Uint16*)(&data[2]) - 0x8000;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTY, axis);
+    axis = (int)*(Uint16*)(&data[4]) - 0x8000;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTX, axis);
+    axis = (int)*(Uint16*)(&data[6]) - 0x8000;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTY, axis);
+
+    axis = (data[9] * 257) - 32768;
+    if (data[9] < 0x80) {
+        axis = -axis * 2 - 32769;
+        SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, axis);
+    } else if (data[9] > 0x80) {
+        axis = axis * 2 - 32767;
+        SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERLEFT, axis);
+    } else {
+        SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERLEFT, SDL_MIN_SINT16);
+        SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, SDL_MIN_SINT16);
+    }
+
+    SDL_memcpy(ctx->last_state, data, SDL_min(size, sizeof(ctx->last_state)));
+}
+#endif /* 0 */
+
 static void
 HIDAPI_DriverXbox360_HandleStatePacket(SDL_Joystick *joystick, hid_device *dev, SDL_DriverXbox360_Context *ctx, Uint8 *data, int size)
 {