Added initial support for MFi game controllers on iOS.

src/joystick/SDL_gamecontrollerdb.h

@@ -45,6 +45,10 @@ static const char *s_ControllerMappings [] =
     "25090500000000000000504944564944,PS3 DualShock,a:b2,b:b1,back:b9,dpdown:h0.8,dpleft:h0.4,dpright:h0.2,dpup:h0.1,guide:,leftshoulder:b6,leftstick:b10,lefttrigger:b4,leftx:a0,lefty:a1,rightshoulder:b7,rightstick:b11,righttrigger:b5,rightx:a2,righty:a3,start:b8,x:b0,y:b3,",
     "4c05c405000000000000504944564944,PS4 Controller,a:b1,b:b2,back:b8,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,guide:b12,leftshoulder:b4,leftstick:b10,lefttrigger:a3,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b11,righttrigger:a4,rightx:a2,righty:a5,start:b9,x:b0,y:b3,",
 #endif
+#if SDL_JOYSTICK_MFI
+    "4d466947616d65706164010000000000,MFi Extended Gamepad,a:b0,b:b1,start:b6,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,leftshoulder:b4,lefttrigger:a2,leftx:a0,lefty:a1,rightshoulder:b5,righttrigger:a5,rightx:a3,righty:a4,x:b2,y:b3,",
+    "4d466947616d65706164020000000000,MFi Gamepad,a:b0,b:b1,start:b6,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,leftshoulder:b4,rightshoulder:b5,x:b2,y:b3,",
+#endif
 #if defined(__MACOSX__)
     "0500000047532047616d657061640000,GameStop Gamepad,a:b0,b:b1,back:b8,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,guide:,leftshoulder:b4,leftstick:b10,lefttrigger:b6,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b11,righttrigger:b7,rightx:a2,righty:a3,start:b9,x:b2,y:b3,",
     "6d0400000000000016c2000000000000,Logitech F310 Gamepad (DInput),a:b1,b:b2,back:b8,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,leftshoulder:b4,leftstick:b10,lefttrigger:b6,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b11,righttrigger:b7,rightx:a2,righty:a3,start:b9,x:b0,y:b3,", /* Guide button doesn't seem to be sent in DInput mode. */

src/joystick/SDL_joystick.c

@@ -669,14 +669,17 @@ SDL_JoystickUpdate(void)
             int i;
 
             /* Tell the app that everything is centered/unpressed...  */
-            for (i = 0; i < joystick->naxes; i++)
+            for (i = 0; i < joystick->naxes; i++) {
                 SDL_PrivateJoystickAxis(joystick, i, 0);
+            }
 
-            for (i = 0; i < joystick->nbuttons; i++)
+            for (i = 0; i < joystick->nbuttons; i++) {
                 SDL_PrivateJoystickButton(joystick, i, 0);
+            }
 
-            for (i = 0; i < joystick->nhats; i++)
+            for (i = 0; i < joystick->nhats; i++) {
                 SDL_PrivateJoystickHat(joystick, i, SDL_HAT_CENTERED);
+            }
 
             joystick->force_recentering = SDL_FALSE;
         }

src/joystick/iphoneos/SDL_sysjoystick_c.h

@@ -0,0 +1,55 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#ifndef SDL_JOYSTICK_IOS_H
+#define SDL_JOYSTICK_IOS_H
+
+#include "SDL_stdinc.h"
+#include "../SDL_sysjoystick.h"
+
+@class GCController;
+
+typedef struct joystick_hwdata
+{
+    SDL_bool accelerometer;
+
+    GCController __unsafe_unretained *controller;
+    int num_pause_presses;
+
+    char *name;
+    SDL_Joystick *joystick;
+    SDL_JoystickID instance_id;
+    SDL_JoystickGUID guid;
+
+    int naxes;
+    int nbuttons;
+    int nhats;
+
+    struct joystick_hwdata *next;
+} joystick_hwdata;
+
+typedef joystick_hwdata SDL_JoystickDeviceItem;
+
+#endif /* SDL_JOYSTICK_IOS_H */
+
+
+/* vi: set ts=4 sw=4 expandtab: */