v1.4.4
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273
lib/windows32/include/SDL_joystick.h
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273
lib/windows32/include/SDL_joystick.h
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/**
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* \file SDL_joystick.h
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*
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* Include file for SDL joystick event handling
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*
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* The term "device_index" identifies currently plugged in joystick devices between 0 and SDL_NumJoysticks(), with the exact joystick
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* behind a device_index changing as joysticks are plugged and unplugged.
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*
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* The term "instance_id" is the current instantiation of a joystick device in the system, if the joystick is removed and then re-inserted
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* then it will get a new instance_id, instance_id's are monotonically increasing identifiers of a joystick plugged in.
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*
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* The term JoystickGUID is a stable 128-bit identifier for a joystick device that does not change over time, it identifies class of
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* the device (a X360 wired controller for example). This identifier is platform dependent.
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*
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*
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*/
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#ifndef _SDL_joystick_h
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#define _SDL_joystick_h
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#include "SDL_stdinc.h"
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#include "SDL_error.h"
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \file SDL_joystick.h
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*
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* In order to use these functions, SDL_Init() must have been called
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* with the ::SDL_INIT_JOYSTICK flag. This causes SDL to scan the system
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* for joysticks, and load appropriate drivers.
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*
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* If you would like to receive joystick updates while the application
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* is in the background, you should set the following hint before calling
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* SDL_Init(): SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS
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*/
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/* The joystick structure used to identify an SDL joystick */
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struct _SDL_Joystick;
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typedef struct _SDL_Joystick SDL_Joystick;
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/* A structure that encodes the stable unique id for a joystick device */
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typedef struct {
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Uint8 data[16];
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} SDL_JoystickGUID;
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typedef Sint32 SDL_JoystickID;
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typedef enum
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{
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SDL_JOYSTICK_POWER_UNKNOWN = -1,
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SDL_JOYSTICK_POWER_EMPTY,
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SDL_JOYSTICK_POWER_LOW,
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SDL_JOYSTICK_POWER_MEDIUM,
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SDL_JOYSTICK_POWER_FULL,
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SDL_JOYSTICK_POWER_WIRED,
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SDL_JOYSTICK_POWER_MAX
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} SDL_JoystickPowerLevel;
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/* Function prototypes */
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/**
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* Count the number of joysticks attached to the system right now
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*/
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extern DECLSPEC int SDLCALL SDL_NumJoysticks(void);
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/**
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* Get the implementation dependent name of a joystick.
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* This can be called before any joysticks are opened.
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* If no name can be found, this function returns NULL.
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*/
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extern DECLSPEC const char *SDLCALL SDL_JoystickNameForIndex(int device_index);
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/**
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* Open a joystick for use.
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* The index passed as an argument refers to the N'th joystick on the system.
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* This index is not the value which will identify this joystick in future
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* joystick events. The joystick's instance id (::SDL_JoystickID) will be used
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* there instead.
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*
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* \return A joystick identifier, or NULL if an error occurred.
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*/
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extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickOpen(int device_index);
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/**
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* Return the SDL_Joystick associated with an instance id.
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*/
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extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickFromInstanceID(SDL_JoystickID joyid);
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/**
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* Return the name for this currently opened joystick.
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* If no name can be found, this function returns NULL.
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*/
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extern DECLSPEC const char *SDLCALL SDL_JoystickName(SDL_Joystick * joystick);
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/**
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* Return the GUID for the joystick at this index
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*/
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extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetDeviceGUID(int device_index);
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/**
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* Return the GUID for this opened joystick
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*/
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extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUID(SDL_Joystick * joystick);
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/**
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* Return a string representation for this guid. pszGUID must point to at least 33 bytes
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* (32 for the string plus a NULL terminator).
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*/
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extern DECLSPEC void SDLCALL SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, char *pszGUID, int cbGUID);
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/**
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* convert a string into a joystick formatted guid
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*/
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extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUIDFromString(const char *pchGUID);
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/**
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* Returns SDL_TRUE if the joystick has been opened and currently connected, or SDL_FALSE if it has not.
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_JoystickGetAttached(SDL_Joystick * joystick);
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/**
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* Get the instance ID of an opened joystick or -1 if the joystick is invalid.
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*/
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extern DECLSPEC SDL_JoystickID SDLCALL SDL_JoystickInstanceID(SDL_Joystick * joystick);
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/**
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* Get the number of general axis controls on a joystick.
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*/
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extern DECLSPEC int SDLCALL SDL_JoystickNumAxes(SDL_Joystick * joystick);
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/**
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* Get the number of trackballs on a joystick.
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*
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* Joystick trackballs have only relative motion events associated
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* with them and their state cannot be polled.
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*/
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extern DECLSPEC int SDLCALL SDL_JoystickNumBalls(SDL_Joystick * joystick);
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/**
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* Get the number of POV hats on a joystick.
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*/
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extern DECLSPEC int SDLCALL SDL_JoystickNumHats(SDL_Joystick * joystick);
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/**
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* Get the number of buttons on a joystick.
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*/
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extern DECLSPEC int SDLCALL SDL_JoystickNumButtons(SDL_Joystick * joystick);
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/**
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* Update the current state of the open joysticks.
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*
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* This is called automatically by the event loop if any joystick
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* events are enabled.
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*/
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extern DECLSPEC void SDLCALL SDL_JoystickUpdate(void);
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/**
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* Enable/disable joystick event polling.
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*
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* If joystick events are disabled, you must call SDL_JoystickUpdate()
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* yourself and check the state of the joystick when you want joystick
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* information.
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*
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* The state can be one of ::SDL_QUERY, ::SDL_ENABLE or ::SDL_IGNORE.
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*/
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extern DECLSPEC int SDLCALL SDL_JoystickEventState(int state);
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/**
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* Get the current state of an axis control on a joystick.
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*
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* The state is a value ranging from -32768 to 32767.
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*
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* The axis indices start at index 0.
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*/
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extern DECLSPEC Sint16 SDLCALL SDL_JoystickGetAxis(SDL_Joystick * joystick,
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int axis);
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/**
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* \name Hat positions
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*/
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/* @{ */
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#define SDL_HAT_CENTERED 0x00
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#define SDL_HAT_UP 0x01
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#define SDL_HAT_RIGHT 0x02
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#define SDL_HAT_DOWN 0x04
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#define SDL_HAT_LEFT 0x08
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#define SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP)
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#define SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN)
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#define SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP)
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#define SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN)
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/* @} */
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/**
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* Get the current state of a POV hat on a joystick.
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*
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* The hat indices start at index 0.
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*
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* \return The return value is one of the following positions:
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* - ::SDL_HAT_CENTERED
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* - ::SDL_HAT_UP
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* - ::SDL_HAT_RIGHT
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* - ::SDL_HAT_DOWN
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* - ::SDL_HAT_LEFT
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* - ::SDL_HAT_RIGHTUP
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* - ::SDL_HAT_RIGHTDOWN
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* - ::SDL_HAT_LEFTUP
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* - ::SDL_HAT_LEFTDOWN
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*/
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extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetHat(SDL_Joystick * joystick,
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int hat);
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/**
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* Get the ball axis change since the last poll.
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*
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* \return 0, or -1 if you passed it invalid parameters.
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*
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* The ball indices start at index 0.
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*/
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extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick * joystick,
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int ball, int *dx, int *dy);
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/**
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* Get the current state of a button on a joystick.
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*
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* The button indices start at index 0.
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*/
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extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick * joystick,
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int button);
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/**
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* Close a joystick previously opened with SDL_JoystickOpen().
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*/
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extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick * joystick);
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/**
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* Return the battery level of this joystick
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*/
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extern DECLSPEC SDL_JoystickPowerLevel SDLCALL SDL_JoystickCurrentPowerLevel(SDL_Joystick * joystick);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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}
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#endif
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#include "close_code.h"
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#endif /* _SDL_joystick_h */
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/* vi: set ts=4 sw=4 expandtab: */
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