src/joystick/windows/SDL_dxjoystick.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 15 Jan 2012 15:48:27 -0500
changeset 6220 c36934808194
parent 6138 4c64952a58fb
child 6403 8d34c6248f4a
permissions -rwxr-xr-x
Fixed bug 1371 - DX joystick axis ordering fix Alex Nankervis 2012-01-15 11:19:45 PST DirectX joysticks can enumerate their axis out of order. This results in some joysticks having vertical/horizontal swapped, for example (vertical axis gets assigned to axis0). Joysticks that I've tested with this problem: XBOX 360 controller, Logitech Extreme 3D Pro. Attached is a diff that fixes this by sorting the DX joystick objects by their data offsets into the DX data structs. This puts the joystick objects into a standard ordering (X axis -> axis0, Y axis -> axis1, and so on).

/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2012 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_config.h"

#ifdef SDL_JOYSTICK_DINPUT

/* DirectInput joystick driver; written by Glenn Maynard, based on Andrei de
 * A. Formiga's WINMM driver. 
 *
 * Hats and sliders are completely untested; the app I'm writing this for mostly
 * doesn't use them and I don't own any joysticks with them. 
 *
 * We don't bother to use event notification here.  It doesn't seem to work
 * with polled devices, and it's fine to call IDirectInputDevice2_GetDeviceData and
 * let it return 0 events. */

#include "SDL_error.h"
#include "SDL_events.h"
#include "SDL_joystick.h"
#include "../SDL_sysjoystick.h"
#include "../SDL_joystick_c.h"
#define INITGUID /* Only set here, if set twice will cause mingw32 to break. */
#include "SDL_dxjoystick_c.h"


#ifndef DIDFT_OPTIONAL
#define DIDFT_OPTIONAL		0x80000000
#endif


#define INPUT_QSIZE	32      /* Buffer up to 32 input messages */
#define MAX_JOYSTICKS	8
#define AXIS_MIN	-32768  /* minimum value for axis coordinate */
#define AXIS_MAX	32767   /* maximum value for axis coordinate */
#define JOY_AXIS_THRESHOLD	(((AXIS_MAX)-(AXIS_MIN))/100)   /* 1% motion */

/* external variables referenced. */
extern HWND SDL_HelperWindow;


/* local variables */
static SDL_bool coinitialized = SDL_FALSE;
static LPDIRECTINPUT dinput = NULL;
extern HRESULT(WINAPI * DInputCreate) (HINSTANCE hinst, DWORD dwVersion,
                                       LPDIRECTINPUT * ppDI,
                                       LPUNKNOWN punkOuter);
static DIDEVICEINSTANCE SYS_Joystick[MAX_JOYSTICKS];    /* array to hold joystick ID values */
static char *SYS_JoystickNames[MAX_JOYSTICKS];
static int SYS_NumJoysticks;
static HINSTANCE DInputDLL = NULL;


/* local prototypes */
static void SetDIerror(const char *function, HRESULT code);
static BOOL CALLBACK EnumJoysticksCallback(const DIDEVICEINSTANCE *
                                           pdidInstance, VOID * pContext);
static BOOL CALLBACK EnumDevObjectsCallback(LPCDIDEVICEOBJECTINSTANCE dev,
                                            LPVOID pvRef);
static void SortDevObjects(SDL_Joystick *joystick);
static Uint8 TranslatePOV(DWORD value);
static int SDL_PrivateJoystickAxis_Int(SDL_Joystick * joystick, Uint8 axis,
                                       Sint16 value);
static int SDL_PrivateJoystickHat_Int(SDL_Joystick * joystick, Uint8 hat,
                                      Uint8 value);
static int SDL_PrivateJoystickButton_Int(SDL_Joystick * joystick,
                                         Uint8 button, Uint8 state);

/* Taken from Wine - Thanks! */
DIOBJECTDATAFORMAT dfDIJoystick2[] = {
  { &GUID_XAxis,DIJOFS_X,DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_YAxis,DIJOFS_Y,DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_ZAxis,DIJOFS_Z,DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RxAxis,DIJOFS_RX,DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RyAxis,DIJOFS_RY,DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RzAxis,DIJOFS_RZ,DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,DIJOFS_SLIDER(0),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,DIJOFS_SLIDER(1),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_POV,DIJOFS_POV(0),DIDFT_OPTIONAL|DIDFT_POV|DIDFT_ANYINSTANCE,0},
  { &GUID_POV,DIJOFS_POV(1),DIDFT_OPTIONAL|DIDFT_POV|DIDFT_ANYINSTANCE,0},
  { &GUID_POV,DIJOFS_POV(2),DIDFT_OPTIONAL|DIDFT_POV|DIDFT_ANYINSTANCE,0},
  { &GUID_POV,DIJOFS_POV(3),DIDFT_OPTIONAL|DIDFT_POV|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(0),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(1),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(2),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(3),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(4),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(5),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(6),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(7),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(8),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(9),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(10),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(11),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(12),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(13),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(14),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(15),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(16),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(17),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(18),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(19),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(20),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(21),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(22),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(23),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(24),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(25),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(26),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(27),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(28),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(29),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(30),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(31),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(32),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(33),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(34),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(35),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(36),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(37),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(38),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(39),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(40),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(41),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(42),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(43),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(44),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(45),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(46),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(47),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(48),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(49),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(50),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(51),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(52),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(53),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(54),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(55),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(56),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(57),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(58),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(59),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(60),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(61),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(62),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(63),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(64),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(65),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(66),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(67),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(68),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(69),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(70),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(71),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(72),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(73),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(74),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(75),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(76),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(77),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(78),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(79),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(80),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(81),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(82),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(83),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(84),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(85),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(86),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(87),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(88),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(89),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(90),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(91),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(92),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(93),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(94),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(95),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(96),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(97),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(98),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(99),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(100),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(101),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(102),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(103),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(104),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(105),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(106),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(107),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(108),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(109),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(110),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(111),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(112),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(113),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(114),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(115),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(116),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(117),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(118),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(119),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(120),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(121),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(122),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(123),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(124),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(125),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(126),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { NULL,DIJOFS_BUTTON(127),DIDFT_OPTIONAL|DIDFT_BUTTON|DIDFT_ANYINSTANCE,0},
  { &GUID_XAxis,FIELD_OFFSET(DIJOYSTATE2,lVX),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_YAxis,FIELD_OFFSET(DIJOYSTATE2,lVY),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_ZAxis,FIELD_OFFSET(DIJOYSTATE2,lVZ),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RxAxis,FIELD_OFFSET(DIJOYSTATE2,lVRx),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RyAxis,FIELD_OFFSET(DIJOYSTATE2,lVRy),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RzAxis,FIELD_OFFSET(DIJOYSTATE2,lVRz),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,FIELD_OFFSET(DIJOYSTATE2,rglVSlider[0]),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,FIELD_OFFSET(DIJOYSTATE2,rglVSlider[1]),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_XAxis,FIELD_OFFSET(DIJOYSTATE2,lAX),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_YAxis,FIELD_OFFSET(DIJOYSTATE2,lAY),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_ZAxis,FIELD_OFFSET(DIJOYSTATE2,lAZ),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RxAxis,FIELD_OFFSET(DIJOYSTATE2,lARx),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RyAxis,FIELD_OFFSET(DIJOYSTATE2,lARy),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RzAxis,FIELD_OFFSET(DIJOYSTATE2,lARz),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,FIELD_OFFSET(DIJOYSTATE2,rglASlider[0]),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,FIELD_OFFSET(DIJOYSTATE2,rglASlider[1]),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_XAxis,FIELD_OFFSET(DIJOYSTATE2,lFX),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_YAxis,FIELD_OFFSET(DIJOYSTATE2,lFY),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_ZAxis,FIELD_OFFSET(DIJOYSTATE2,lFZ),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RxAxis,FIELD_OFFSET(DIJOYSTATE2,lFRx),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RyAxis,FIELD_OFFSET(DIJOYSTATE2,lFRy),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_RzAxis,FIELD_OFFSET(DIJOYSTATE2,lFRz),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,FIELD_OFFSET(DIJOYSTATE2,rglFSlider[0]),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
  { &GUID_Slider,FIELD_OFFSET(DIJOYSTATE2,rglFSlider[1]),DIDFT_OPTIONAL|DIDFT_AXIS|DIDFT_ANYINSTANCE,0},
};

const DIDATAFORMAT c_dfDIJoystick2 = {
    sizeof(DIDATAFORMAT),
    sizeof(DIOBJECTDATAFORMAT),
    DIDF_ABSAXIS,
    sizeof(DIJOYSTATE2),
    SDL_arraysize(dfDIJoystick2),
    dfDIJoystick2
};


/* Convert a DirectInput return code to a text message */
static void
SetDIerror(const char *function, HRESULT code)
{
    /*
    SDL_SetError("%s() [%s]: %s", function,
                 DXGetErrorString9A(code), DXGetErrorDescription9A(code));
     */
    SDL_SetError("%s() DirectX error %d", function, code);
}


/* Function to scan the system for joysticks.
 * This function should set SDL_numjoysticks to the number of available
 * joysticks.  Joystick 0 should be the system default joystick.
 * It should return 0, or -1 on an unrecoverable fatal error.
 */
int
SDL_SYS_JoystickInit(void)
{
    HRESULT result;
    HINSTANCE instance;

    SYS_NumJoysticks = 0;

    result = WIN_CoInitialize();
    if (FAILED(result)) {
        SetDIerror("CoInitialize", result);
        return (-1);
    }

    coinitialized = SDL_TRUE;

    result = CoCreateInstance(&CLSID_DirectInput, NULL, CLSCTX_INPROC_SERVER,
                              &IID_IDirectInput, (LPVOID)&dinput);

    if (FAILED(result)) {
        SDL_SYS_JoystickQuit();
        SetDIerror("CoCreateInstance", result);
        return (-1);
    }

    /* Because we used CoCreateInstance, we need to Initialize it, first. */
    instance = GetModuleHandle(NULL);
    if (instance == NULL) {
        SDL_SYS_JoystickQuit();
        SDL_SetError("GetModuleHandle() failed with error code %d.",
                     GetLastError());
        return (-1);
    }
    result = IDirectInput_Initialize(dinput, instance, DIRECTINPUT_VERSION);

    if (FAILED(result)) {
        SDL_SYS_JoystickQuit();
        SetDIerror("IDirectInput::Initialize", result);
        return (-1);
    }

    /* Look for joysticks, wheels, head trackers, gamepads, etc.. */
    result = IDirectInput_EnumDevices(dinput,
                                      DIDEVTYPE_JOYSTICK,
                                      EnumJoysticksCallback,
                                      NULL, DIEDFL_ATTACHEDONLY);

    return SYS_NumJoysticks;
}

static BOOL CALLBACK
EnumJoysticksCallback(const DIDEVICEINSTANCE * pdidInstance, VOID * pContext)
{
    SDL_memcpy(&SYS_Joystick[SYS_NumJoysticks], pdidInstance,
               sizeof(DIDEVICEINSTANCE));
    SYS_JoystickNames[SYS_NumJoysticks] = WIN_StringToUTF8(pdidInstance->tszProductName);
    SYS_NumJoysticks++;

    if (SYS_NumJoysticks >= MAX_JOYSTICKS)
        return DIENUM_STOP;

    return DIENUM_CONTINUE;
}

/* Function to get the device-dependent name of a joystick */
const char *
SDL_SYS_JoystickName(int index)
{
    return SYS_JoystickNames[index];
}

/* Function to open a joystick for use.
   The joystick to open is specified by the index field of the joystick.
   This should fill the nbuttons and naxes fields of the joystick structure.
   It returns 0, or -1 if there is an error.
 */
int
SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
{
    HRESULT result;
    LPDIRECTINPUTDEVICE device;
    DIPROPDWORD dipdw;

    SDL_memset(&dipdw, 0, sizeof(DIPROPDWORD));
    dipdw.diph.dwSize = sizeof(DIPROPDWORD);
    dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);


    /* allocate memory for system specific hardware data */
    joystick->hwdata =
        (struct joystick_hwdata *) SDL_malloc(sizeof(struct joystick_hwdata));
    if (joystick->hwdata == NULL) {
        SDL_OutOfMemory();
        return (-1);
    }
    SDL_memset(joystick->hwdata, 0, sizeof(struct joystick_hwdata));
    joystick->hwdata->buffered = 1;
    joystick->hwdata->Capabilities.dwSize = sizeof(DIDEVCAPS);

    result =
        IDirectInput_CreateDevice(dinput,
                                  &SYS_Joystick[joystick->index].
                                  guidInstance, &device, NULL);
    if (FAILED(result)) {
        SetDIerror("IDirectInput::CreateDevice", result);
        return (-1);
    }

    /* Now get the IDirectInputDevice2 interface, instead. */
    result = IDirectInputDevice_QueryInterface(device,
                                               &IID_IDirectInputDevice2,
                                               (LPVOID *) & joystick->
                                               hwdata->InputDevice);
    /* We are done with this object.  Use the stored one from now on. */
    IDirectInputDevice_Release(device);

    if (FAILED(result)) {
        SetDIerror("IDirectInputDevice::QueryInterface", result);
        return (-1);
    }

    /* Aquire shared access. Exclusive access is required for forces,
     * though. */
    result =
        IDirectInputDevice2_SetCooperativeLevel(joystick->hwdata->
                                                InputDevice, SDL_HelperWindow,
                                                DISCL_EXCLUSIVE |
                                                DISCL_BACKGROUND);
    if (FAILED(result)) {
        SetDIerror("IDirectInputDevice2::SetCooperativeLevel", result);
        return (-1);
    }

    /* Use the extended data structure: DIJOYSTATE2. */
    result =
        IDirectInputDevice2_SetDataFormat(joystick->hwdata->InputDevice,
                                          &c_dfDIJoystick2);
    if (FAILED(result)) {
        SetDIerror("IDirectInputDevice2::SetDataFormat", result);
        return (-1);
    }

    /* Get device capabilities */
    result =
        IDirectInputDevice2_GetCapabilities(joystick->hwdata->InputDevice,
                                            &joystick->hwdata->Capabilities);

    if (FAILED(result)) {
        SetDIerror("IDirectInputDevice2::GetCapabilities", result);
        return (-1);
    }

    /* Force capable? */
    if (joystick->hwdata->Capabilities.dwFlags & DIDC_FORCEFEEDBACK) {

        result = IDirectInputDevice2_Acquire(joystick->hwdata->InputDevice);

        if (FAILED(result)) {
            SetDIerror("IDirectInputDevice2::Acquire", result);
            return (-1);
        }

        /* reset all accuators. */
        result =
            IDirectInputDevice2_SendForceFeedbackCommand(joystick->hwdata->
                                                         InputDevice,
                                                         DISFFC_RESET);

        /* Not necessarily supported, ignore if not supported.
        if (FAILED(result)) {
            SetDIerror("IDirectInputDevice2::SendForceFeedbackCommand",
                       result);
            return (-1);
        }
        */

        result = IDirectInputDevice2_Unacquire(joystick->hwdata->InputDevice);

        if (FAILED(result)) {
            SetDIerror("IDirectInputDevice2::Unacquire", result);
            return (-1);
        }

        /* Turn on auto-centering for a ForceFeedback device (until told
         * otherwise). */
        dipdw.diph.dwObj = 0;
        dipdw.diph.dwHow = DIPH_DEVICE;
        dipdw.dwData = DIPROPAUTOCENTER_ON;

        result =
            IDirectInputDevice2_SetProperty(joystick->hwdata->InputDevice,
                                            DIPROP_AUTOCENTER, &dipdw.diph);

        /* Not necessarily supported, ignore if not supported.
        if (FAILED(result)) {
            SetDIerror("IDirectInputDevice2::SetProperty", result);
            return (-1);
        }
        */
    }

    /* What buttons and axes does it have? */
    IDirectInputDevice2_EnumObjects(joystick->hwdata->InputDevice,
                                    EnumDevObjectsCallback, joystick,
                                    DIDFT_BUTTON | DIDFT_AXIS | DIDFT_POV);

	/* Reorder the input objects. Some devices do not report the X axis as
	 * the first axis, for example. */
	SortDevObjects(joystick);

    dipdw.diph.dwObj = 0;
    dipdw.diph.dwHow = DIPH_DEVICE;
    dipdw.dwData = INPUT_QSIZE;

    /* Set the buffer size */
    result =
        IDirectInputDevice2_SetProperty(joystick->hwdata->InputDevice,
                                        DIPROP_BUFFERSIZE, &dipdw.diph);

    if (result == DI_POLLEDDEVICE) {
        /* This device doesn't support buffering, so we're forced
         * to use less reliable polling. */
        joystick->hwdata->buffered = 0;
    } else if (FAILED(result)) {
        SetDIerror("IDirectInputDevice2::SetProperty", result);
        return (-1);
    }

    return (0);
}

/* Sort using the data offset into the DInput struct.
 * This gives a reasonable ordering for the inputs. */
static int
SortDevFunc(const void *a, const void *b)
{
	const input_t *inputA = (const input_t*)a;
	const input_t *inputB = (const input_t*)b;

	if (inputA->ofs < inputB->ofs)
		return -1;
	if (inputA->ofs > inputB->ofs)
		return 1;
	return 0;
}

/* Sort the input objects and recalculate the indices for each input. */
static void
SortDevObjects(SDL_Joystick *joystick)
{
	input_t *inputs = joystick->hwdata->Inputs;
	int nButtons = 0;
	int nHats = 0;
	int nAxis = 0;
	int n;

	SDL_qsort(inputs, joystick->hwdata->NumInputs, sizeof(input_t), SortDevFunc);

	for (n = 0; n < joystick->hwdata->NumInputs; n++)
	{
		switch (inputs[n].type)
		{
		case BUTTON:
			inputs[n].num = nButtons;
			nButtons++;
			break;

		case HAT:
			inputs[n].num = nHats;
			nHats++;
			break;

		case AXIS:
			inputs[n].num = nAxis;
			nAxis++;
			break;
		}
	}
}

static BOOL CALLBACK
EnumDevObjectsCallback(LPCDIDEVICEOBJECTINSTANCE dev, LPVOID pvRef)
{
    SDL_Joystick *joystick = (SDL_Joystick *) pvRef;
    HRESULT result;
    input_t *in = &joystick->hwdata->Inputs[joystick->hwdata->NumInputs];

    in->ofs = dev->dwOfs;

    if (dev->dwType & DIDFT_BUTTON) {
        in->type = BUTTON;
        in->num = joystick->nbuttons;
        joystick->nbuttons++;
    } else if (dev->dwType & DIDFT_POV) {
        in->type = HAT;
        in->num = joystick->nhats;
        joystick->nhats++;
    } else if (dev->dwType & DIDFT_AXIS) {
        DIPROPRANGE diprg;
        DIPROPDWORD dilong;

        in->type = AXIS;
        in->num = joystick->naxes;

        diprg.diph.dwSize = sizeof(diprg);
        diprg.diph.dwHeaderSize = sizeof(diprg.diph);
        diprg.diph.dwObj = dev->dwOfs;
        diprg.diph.dwHow = DIPH_BYOFFSET;
        diprg.lMin = AXIS_MIN;
        diprg.lMax = AXIS_MAX;

        result =
            IDirectInputDevice2_SetProperty(joystick->hwdata->InputDevice,
                                            DIPROP_RANGE, &diprg.diph);
        if (FAILED(result)) {
            return DIENUM_CONTINUE;     /* don't use this axis */
        }

        /* Set dead zone to 0. */
        dilong.diph.dwSize = sizeof(dilong);
        dilong.diph.dwHeaderSize = sizeof(dilong.diph);
        dilong.diph.dwObj = dev->dwOfs;
        dilong.diph.dwHow = DIPH_BYOFFSET;
        dilong.dwData = 0;
        result =
            IDirectInputDevice2_SetProperty(joystick->hwdata->InputDevice,
                                            DIPROP_DEADZONE, &dilong.diph);
        if (FAILED(result)) {
            return DIENUM_CONTINUE;     /* don't use this axis */
        }

        joystick->naxes++;
    } else {
        /* not supported at this time */
        return DIENUM_CONTINUE;
    }

    joystick->hwdata->NumInputs++;

    if (joystick->hwdata->NumInputs == MAX_INPUTS) {
        return DIENUM_STOP;     /* too many */
    }

    return DIENUM_CONTINUE;
}

/* Function to update the state of a joystick - called as a device poll.
 * This function shouldn't update the joystick structure directly,
 * but instead should call SDL_PrivateJoystick*() to deliver events
 * and update joystick device state.
 */
void
SDL_SYS_JoystickUpdate_Polled(SDL_Joystick * joystick)
{
    DIJOYSTATE2 state;
    HRESULT result;
    int i;

    result =
        IDirectInputDevice2_GetDeviceState(joystick->hwdata->InputDevice,
                                           sizeof(DIJOYSTATE2), &state);
    if (result == DIERR_INPUTLOST || result == DIERR_NOTACQUIRED) {
        IDirectInputDevice2_Acquire(joystick->hwdata->InputDevice);
        result =
            IDirectInputDevice2_GetDeviceState(joystick->hwdata->InputDevice,
                                               sizeof(DIJOYSTATE2), &state);
    }

    /* Set each known axis, button and POV. */
    for (i = 0; i < joystick->hwdata->NumInputs; ++i) {
        const input_t *in = &joystick->hwdata->Inputs[i];

        switch (in->type) {
        case AXIS:
            switch (in->ofs) {
            case DIJOFS_X:
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.lX);
                break;
            case DIJOFS_Y:
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.lY);
                break;
            case DIJOFS_Z:
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.lZ);
                break;
            case DIJOFS_RX:
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.lRx);
                break;
            case DIJOFS_RY:
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.lRy);
                break;
            case DIJOFS_RZ:
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.lRz);
                break;
            case DIJOFS_SLIDER(0):
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.rglSlider[0]);
                break;
            case DIJOFS_SLIDER(1):
                SDL_PrivateJoystickAxis_Int(joystick, in->num,
                                            (Sint16) state.rglSlider[1]);
                break;
            }

            break;

        case BUTTON:
            SDL_PrivateJoystickButton_Int(joystick, in->num,
                                          (Uint8) (state.
                                                   rgbButtons[in->ofs -
                                                              DIJOFS_BUTTON0]
                                                   ? SDL_PRESSED :
                                                   SDL_RELEASED));
            break;
        case HAT:
            {
                Uint8 pos = TranslatePOV(state.rgdwPOV[in->ofs -
                                                       DIJOFS_POV(0)]);
                SDL_PrivateJoystickHat_Int(joystick, in->num, pos);
                break;
            }
        }
    }
}

void
SDL_SYS_JoystickUpdate_Buffered(SDL_Joystick * joystick)
{
    int i;
    HRESULT result;
    DWORD numevents;
    DIDEVICEOBJECTDATA evtbuf[INPUT_QSIZE];

    numevents = INPUT_QSIZE;
    result =
        IDirectInputDevice2_GetDeviceData(joystick->hwdata->InputDevice,
                                          sizeof(DIDEVICEOBJECTDATA), evtbuf,
                                          &numevents, 0);
    if (result == DIERR_INPUTLOST || result == DIERR_NOTACQUIRED) {
        IDirectInputDevice2_Acquire(joystick->hwdata->InputDevice);
        result =
            IDirectInputDevice2_GetDeviceData(joystick->hwdata->InputDevice,
                                              sizeof(DIDEVICEOBJECTDATA),
                                              evtbuf, &numevents, 0);
    }

    /* Handle the events or punt */
    if (FAILED(result))
        return;

    for (i = 0; i < (int) numevents; ++i) {
        int j;

        for (j = 0; j < joystick->hwdata->NumInputs; ++j) {
            const input_t *in = &joystick->hwdata->Inputs[j];

            if (evtbuf[i].dwOfs != in->ofs)
                continue;

            switch (in->type) {
            case AXIS:
                SDL_PrivateJoystickAxis(joystick, in->num,
                                        (Sint16) evtbuf[i].dwData);
                break;
            case BUTTON:
                SDL_PrivateJoystickButton(joystick, in->num,
                                          (Uint8) (evtbuf[i].
                                                   dwData ? SDL_PRESSED :
                                                   SDL_RELEASED));
                break;
            case HAT:
                {
                    Uint8 pos = TranslatePOV(evtbuf[i].dwData);
                    SDL_PrivateJoystickHat(joystick, in->num, pos);
                }
            }
        }
    }
}


static Uint8
TranslatePOV(DWORD value)
{
    const int HAT_VALS[] = {
        SDL_HAT_UP,
        SDL_HAT_UP | SDL_HAT_RIGHT,
        SDL_HAT_RIGHT,
        SDL_HAT_DOWN | SDL_HAT_RIGHT,
        SDL_HAT_DOWN,
        SDL_HAT_DOWN | SDL_HAT_LEFT,
        SDL_HAT_LEFT,
        SDL_HAT_UP | SDL_HAT_LEFT
    };

    if (LOWORD(value) == 0xFFFF)
        return SDL_HAT_CENTERED;

    /* Round the value up: */
    value += 4500 / 2;
    value %= 36000;
    value /= 4500;

    if (value >= 8)
        return SDL_HAT_CENTERED;        /* shouldn't happen */

    return HAT_VALS[value];
}

/* SDL_PrivateJoystick* doesn't discard duplicate events, so we need to
 * do it. */
static int
SDL_PrivateJoystickAxis_Int(SDL_Joystick * joystick, Uint8 axis, Sint16 value)
{
    if (joystick->axes[axis] != value)
        return SDL_PrivateJoystickAxis(joystick, axis, value);
    return 0;
}

static int
SDL_PrivateJoystickHat_Int(SDL_Joystick * joystick, Uint8 hat, Uint8 value)
{
    if (joystick->hats[hat] != value)
        return SDL_PrivateJoystickHat(joystick, hat, value);
    return 0;
}

static int
SDL_PrivateJoystickButton_Int(SDL_Joystick * joystick, Uint8 button,
                              Uint8 state)
{
    if (joystick->buttons[button] != state)
        return SDL_PrivateJoystickButton(joystick, button, state);
    return 0;
}

void
SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
{
    HRESULT result;

    result = IDirectInputDevice2_Poll(joystick->hwdata->InputDevice);
    if (result == DIERR_INPUTLOST || result == DIERR_NOTACQUIRED) {
        IDirectInputDevice2_Acquire(joystick->hwdata->InputDevice);
        IDirectInputDevice2_Poll(joystick->hwdata->InputDevice);
    }

    if (joystick->hwdata->buffered)
        SDL_SYS_JoystickUpdate_Buffered(joystick);
    else
        SDL_SYS_JoystickUpdate_Polled(joystick);
}

/* Function to close a joystick after use */
void
SDL_SYS_JoystickClose(SDL_Joystick * joystick)
{
    IDirectInputDevice2_Unacquire(joystick->hwdata->InputDevice);
    IDirectInputDevice2_Release(joystick->hwdata->InputDevice);

    if (joystick->hwdata != NULL) {
        /* free system specific hardware data */
        SDL_free(joystick->hwdata);
    }
}

/* Function to perform any system-specific joystick related cleanup */
void
SDL_SYS_JoystickQuit(void)
{
    int i;

    for (i = 0; i < SDL_arraysize(SYS_JoystickNames); ++i) {
        if (SYS_JoystickNames[i]) {
            SDL_free(SYS_JoystickNames[i]);
            SYS_JoystickNames[i] = NULL;
        }
    }

    if (dinput != NULL) {
        IDirectInput_Release(dinput);
        dinput = NULL;
    }

    if (coinitialized) {
        WIN_CoUninitialize();
        coinitialized = SDL_FALSE;
    }
}

#endif /* SDL_JOYSTICK_DINPUT */

/* vi: set ts=4 sw=4 expandtab: */