include/SDL_joystick.h
author Philipp Wiesemann <philipp.wiesemann@arcor.de>
Thu, 16 Jul 2015 21:48:35 +0200
changeset 9806 2deeef7b793c
parent 9619 b94b6d0bff0f
child 9884 26b595dea221
permissions -rw-r--r--
Fixed spaces in header file.
slouken@0
     1
/*
slouken@5535
     2
  Simple DirectMedia Layer
slouken@9619
     3
  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
slouken@0
     4
slouken@5535
     5
  This software is provided 'as-is', without any express or implied
slouken@5535
     6
  warranty.  In no event will the authors be held liable for any damages
slouken@5535
     7
  arising from the use of this software.
slouken@0
     8
slouken@5535
     9
  Permission is granted to anyone to use this software for any purpose,
slouken@5535
    10
  including commercial applications, and to alter it and redistribute it
slouken@5535
    11
  freely, subject to the following restrictions:
slouken@0
    12
slouken@5535
    13
  1. The origin of this software must not be misrepresented; you must not
slouken@5535
    14
     claim that you wrote the original software. If you use this software
slouken@5535
    15
     in a product, an acknowledgment in the product documentation would be
slouken@5535
    16
     appreciated but is not required.
slouken@5535
    17
  2. Altered source versions must be plainly marked as such, and must not be
slouken@5535
    18
     misrepresented as being the original software.
slouken@5535
    19
  3. This notice may not be removed or altered from any source distribution.
slouken@0
    20
*/
slouken@0
    21
slouken@1895
    22
/**
slouken@3407
    23
 *  \file SDL_joystick.h
slouken@7191
    24
 *
slouken@3407
    25
 *  Include file for SDL joystick event handling
slouken@6690
    26
 *
slouken@6690
    27
 * The term "device_index" identifies currently plugged in joystick devices between 0 and SDL_NumJoysticks, with the exact joystick
slouken@6690
    28
 *   behind a device_index changing as joysticks are plugged and unplugged.
slouken@6690
    29
 *
slouken@6690
    30
 * The term "instance_id" is the current instantiation of a joystick device in the system, if the joystick is removed and then re-inserted
slouken@6690
    31
 *   then it will get a new instance_id, instance_id's are monotonically increasing identifiers of a joystick plugged in.
slouken@6690
    32
 *
slouken@7191
    33
 * The term JoystickGUID is a stable 128-bit identifier for a joystick device that does not change over time, it identifies class of
slouken@6690
    34
 *   the device (a X360 wired controller for example). This identifier is platform dependent.
slouken@6690
    35
 *
slouken@6690
    36
 *
slouken@1895
    37
 */
slouken@0
    38
slouken@0
    39
#ifndef _SDL_joystick_h
slouken@0
    40
#define _SDL_joystick_h
slouken@0
    41
slouken@1356
    42
#include "SDL_stdinc.h"
slouken@1358
    43
#include "SDL_error.h"
slouken@0
    44
slouken@0
    45
#include "begin_code.h"
slouken@0
    46
/* Set up for C function definitions, even when using C++ */
slouken@0
    47
#ifdef __cplusplus
slouken@0
    48
extern "C" {
slouken@0
    49
#endif
slouken@0
    50
slouken@3407
    51
/**
slouken@3407
    52
 *  \file SDL_joystick.h
slouken@3407
    53
 *
slouken@3407
    54
 *  In order to use these functions, SDL_Init() must have been called
slouken@3407
    55
 *  with the ::SDL_INIT_JOYSTICK flag.  This causes SDL to scan the system
slouken@3407
    56
 *  for joysticks, and load appropriate drivers.
slouken@7341
    57
 *
slouken@7341
    58
 *  If you would like to receive joystick updates while the application
slouken@7341
    59
 *  is in the background, you should set the following hint before calling
slouken@7341
    60
 *  SDL_Init(): SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS
slouken@3407
    61
 */
slouken@0
    62
slouken@0
    63
/* The joystick structure used to identify an SDL joystick */
slouken@0
    64
struct _SDL_Joystick;
slouken@0
    65
typedef struct _SDL_Joystick SDL_Joystick;
slouken@0
    66
slouken@6707
    67
/* A structure that encodes the stable unique id for a joystick device */
slouken@6707
    68
typedef struct {
slouken@7191
    69
    Uint8 data[16];
slouken@6738
    70
} SDL_JoystickGUID;
slouken@6707
    71
slouken@6974
    72
typedef Sint32 SDL_JoystickID;
slouken@6707
    73
slouken@6707
    74
slouken@0
    75
/* Function prototypes */
slouken@3407
    76
/**
slouken@6690
    77
 *  Count the number of joysticks attached to the system right now
slouken@0
    78
 */
slouken@337
    79
extern DECLSPEC int SDLCALL SDL_NumJoysticks(void);
slouken@0
    80
slouken@3407
    81
/**
slouken@3407
    82
 *  Get the implementation dependent name of a joystick.
slouken@3407
    83
 *  This can be called before any joysticks are opened.
slouken@3407
    84
 *  If no name can be found, this function returns NULL.
slouken@0
    85
 */
slouken@6690
    86
extern DECLSPEC const char *SDLCALL SDL_JoystickNameForIndex(int device_index);
slouken@0
    87
slouken@3407
    88
/**
slouken@7191
    89
 *  Open a joystick for use.
philipp@9227
    90
 *  The index passed as an argument refers to the N'th joystick on the system.
philipp@9569
    91
 *  This index is not the value which will identify this joystick in future
philipp@9569
    92
 *  joystick events.  The joystick's instance id (::SDL_JoystickID) will be used
philipp@9569
    93
 *  there instead.
slouken@7191
    94
 *
slouken@3407
    95
 *  \return A joystick identifier, or NULL if an error occurred.
slouken@0
    96
 */
slouken@1895
    97
extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickOpen(int device_index);
slouken@0
    98
slouken@3407
    99
/**
slouken@6690
   100
 *  Return the name for this currently opened joystick.
slouken@6690
   101
 *  If no name can be found, this function returns NULL.
slouken@0
   102
 */
slouken@6690
   103
extern DECLSPEC const char *SDLCALL SDL_JoystickName(SDL_Joystick * joystick);
slouken@7191
   104
slouken@6690
   105
/**
slouken@6690
   106
 *  Return the GUID for the joystick at this index
slouken@6690
   107
 */
slouken@6738
   108
extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetDeviceGUID(int device_index);
slouken@6690
   109
slouken@6690
   110
/**
slouken@6690
   111
 *  Return the GUID for this opened joystick
slouken@6690
   112
 */
slouken@6738
   113
extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUID(SDL_Joystick * joystick);
slouken@6690
   114
slouken@6690
   115
/**
icculus@6746
   116
 *  Return a string representation for this guid. pszGUID must point to at least 33 bytes
icculus@6746
   117
 *  (32 for the string plus a NULL terminator).
slouken@6690
   118
 */
icculus@8028
   119
extern DECLSPEC void SDLCALL SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, char *pszGUID, int cbGUID);
slouken@6690
   120
slouken@6690
   121
/**
slouken@6690
   122
 *  convert a string into a joystick formatted guid
slouken@6690
   123
 */
slouken@6738
   124
extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUIDFromString(const char *pchGUID);
slouken@6690
   125
slouken@6707
   126
/**
slouken@6707
   127
 *  Returns SDL_TRUE if the joystick has been opened and currently connected, or SDL_FALSE if it has not.
slouken@6707
   128
 */
slouken@6707
   129
extern DECLSPEC SDL_bool SDLCALL SDL_JoystickGetAttached(SDL_Joystick * joystick);
slouken@6690
   130
slouken@6690
   131
/**
slouken@6974
   132
 *  Get the instance ID of an opened joystick or -1 if the joystick is invalid.
slouken@0
   133
 */
slouken@6690
   134
extern DECLSPEC SDL_JoystickID SDLCALL SDL_JoystickInstanceID(SDL_Joystick * joystick);
slouken@0
   135
slouken@3407
   136
/**
slouken@3407
   137
 *  Get the number of general axis controls on a joystick.
slouken@0
   138
 */
slouken@1895
   139
extern DECLSPEC int SDLCALL SDL_JoystickNumAxes(SDL_Joystick * joystick);
slouken@0
   140
slouken@3407
   141
/**
slouken@3407
   142
 *  Get the number of trackballs on a joystick.
slouken@7191
   143
 *
slouken@3407
   144
 *  Joystick trackballs have only relative motion events associated
slouken@3407
   145
 *  with them and their state cannot be polled.
slouken@0
   146
 */
slouken@1895
   147
extern DECLSPEC int SDLCALL SDL_JoystickNumBalls(SDL_Joystick * joystick);
slouken@0
   148
slouken@3407
   149
/**
slouken@3407
   150
 *  Get the number of POV hats on a joystick.
slouken@0
   151
 */
slouken@1895
   152
extern DECLSPEC int SDLCALL SDL_JoystickNumHats(SDL_Joystick * joystick);
slouken@0
   153
slouken@3407
   154
/**
slouken@3407
   155
 *  Get the number of buttons on a joystick.
slouken@0
   156
 */
slouken@1895
   157
extern DECLSPEC int SDLCALL SDL_JoystickNumButtons(SDL_Joystick * joystick);
slouken@0
   158
slouken@3407
   159
/**
slouken@3407
   160
 *  Update the current state of the open joysticks.
slouken@7191
   161
 *
slouken@3407
   162
 *  This is called automatically by the event loop if any joystick
slouken@3407
   163
 *  events are enabled.
slouken@0
   164
 */
slouken@337
   165
extern DECLSPEC void SDLCALL SDL_JoystickUpdate(void);
slouken@0
   166
slouken@3407
   167
/**
slouken@3407
   168
 *  Enable/disable joystick event polling.
slouken@7191
   169
 *
slouken@3407
   170
 *  If joystick events are disabled, you must call SDL_JoystickUpdate()
slouken@3407
   171
 *  yourself and check the state of the joystick when you want joystick
slouken@3407
   172
 *  information.
slouken@7191
   173
 *
slouken@3407
   174
 *  The state can be one of ::SDL_QUERY, ::SDL_ENABLE or ::SDL_IGNORE.
slouken@0
   175
 */
slouken@337
   176
extern DECLSPEC int SDLCALL SDL_JoystickEventState(int state);
slouken@0
   177
slouken@3407
   178
/**
slouken@3407
   179
 *  Get the current state of an axis control on a joystick.
slouken@7191
   180
 *
slouken@3407
   181
 *  The state is a value ranging from -32768 to 32767.
slouken@7191
   182
 *
slouken@3407
   183
 *  The axis indices start at index 0.
slouken@0
   184
 */
slouken@1895
   185
extern DECLSPEC Sint16 SDLCALL SDL_JoystickGetAxis(SDL_Joystick * joystick,
slouken@1895
   186
                                                   int axis);
slouken@0
   187
slouken@3407
   188
/**
slouken@3407
   189
 *  \name Hat positions
slouken@0
   190
 */
gabomdq@7678
   191
/* @{ */
slouken@7191
   192
#define SDL_HAT_CENTERED    0x00
philipp@9806
   193
#define SDL_HAT_UP          0x01
slouken@7191
   194
#define SDL_HAT_RIGHT       0x02
slouken@7191
   195
#define SDL_HAT_DOWN        0x04
slouken@7191
   196
#define SDL_HAT_LEFT        0x08
slouken@7191
   197
#define SDL_HAT_RIGHTUP     (SDL_HAT_RIGHT|SDL_HAT_UP)
slouken@7191
   198
#define SDL_HAT_RIGHTDOWN   (SDL_HAT_RIGHT|SDL_HAT_DOWN)
slouken@7191
   199
#define SDL_HAT_LEFTUP      (SDL_HAT_LEFT|SDL_HAT_UP)
slouken@7191
   200
#define SDL_HAT_LEFTDOWN    (SDL_HAT_LEFT|SDL_HAT_DOWN)
gabomdq@7678
   201
/* @} */
slouken@3407
   202
slouken@3407
   203
/**
slouken@3407
   204
 *  Get the current state of a POV hat on a joystick.
slouken@3407
   205
 *
slouken@3407
   206
 *  The hat indices start at index 0.
slouken@7191
   207
 *
slouken@3407
   208
 *  \return The return value is one of the following positions:
slouken@3407
   209
 *           - ::SDL_HAT_CENTERED
slouken@3407
   210
 *           - ::SDL_HAT_UP
slouken@3407
   211
 *           - ::SDL_HAT_RIGHT
slouken@3407
   212
 *           - ::SDL_HAT_DOWN
slouken@3407
   213
 *           - ::SDL_HAT_LEFT
slouken@3407
   214
 *           - ::SDL_HAT_RIGHTUP
slouken@3407
   215
 *           - ::SDL_HAT_RIGHTDOWN
slouken@3407
   216
 *           - ::SDL_HAT_LEFTUP
slouken@3407
   217
 *           - ::SDL_HAT_LEFTDOWN
slouken@0
   218
 */
slouken@1895
   219
extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetHat(SDL_Joystick * joystick,
slouken@1895
   220
                                                 int hat);
slouken@0
   221
slouken@3407
   222
/**
slouken@3407
   223
 *  Get the ball axis change since the last poll.
slouken@7191
   224
 *
slouken@3407
   225
 *  \return 0, or -1 if you passed it invalid parameters.
slouken@7191
   226
 *
slouken@3407
   227
 *  The ball indices start at index 0.
slouken@0
   228
 */
slouken@1895
   229
extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick * joystick,
slouken@1895
   230
                                                int ball, int *dx, int *dy);
slouken@0
   231
slouken@3407
   232
/**
slouken@3407
   233
 *  Get the current state of a button on a joystick.
slouken@7191
   234
 *
slouken@3407
   235
 *  The button indices start at index 0.
slouken@0
   236
 */
slouken@1895
   237
extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick * joystick,
slouken@1895
   238
                                                    int button);
slouken@0
   239
slouken@3407
   240
/**
slouken@3407
   241
 *  Close a joystick previously opened with SDL_JoystickOpen().
slouken@0
   242
 */
slouken@1895
   243
extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick * joystick);
slouken@0
   244
slouken@0
   245
slouken@0
   246
/* Ends C function definitions when using C++ */
slouken@0
   247
#ifdef __cplusplus
slouken@0
   248
}
slouken@0
   249
#endif
slouken@0
   250
#include "close_code.h"
slouken@0
   251
slouken@0
   252
#endif /* _SDL_joystick_h */
slouken@1895
   253
slouken@1895
   254
/* vi: set ts=4 sw=4 expandtab: */