This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_gamecontroller.c
1285 lines (1122 loc) · 44.6 KB
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
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"
/* This is the game controller API for Simple DirectMedia Layer */
#include "SDL_events.h"
#include "SDL_assert.h"
#include "SDL_sysjoystick.h"
#include "SDL_hints.h"
#if !SDL_EVENTS_DISABLED
#include "../events/SDL_events_c.h"
#endif
#define ABS(_x) ((_x) < 0 ? -(_x) : (_x))
/* a list of currently opened game controllers */
static SDL_GameController *SDL_gamecontrollers = NULL;
39
40
/* keep track of the hat and mask value that transforms this hat movement into a button/axis press */
struct _SDL_HatMapping
41
{
42
43
int hat;
Uint8 mask;
44
45
46
47
};
#define k_nMaxReverseEntries 20
48
49
50
51
/**
* We are encoding the "HAT" as 0xhm. where h == hat ID and m == mask
* MAX 4 hats supported
*/
52
53
#define k_nMaxHatEntries 0x3f + 1
54
55
56
/* our in memory mapping db between joystick objects and controller mappings*/
struct _SDL_ControllerMapping
{
57
58
SDL_JoystickGUID guid;
const char *name;
59
60
61
62
/* mapping of axis/button id to controller version */
int axes[SDL_CONTROLLER_AXIS_MAX];
int buttonasaxis[SDL_CONTROLLER_AXIS_MAX];
63
64
65
66
int buttons[SDL_CONTROLLER_BUTTON_MAX];
int axesasbutton[SDL_CONTROLLER_BUTTON_MAX];
struct _SDL_HatMapping hatasbutton[SDL_CONTROLLER_BUTTON_MAX];
67
68
69
70
/* reverse mapping, joystick indices to buttons */
SDL_GameControllerAxis raxes[k_nMaxReverseEntries];
SDL_GameControllerAxis rbuttonasaxis[k_nMaxReverseEntries];
71
72
73
74
SDL_GameControllerButton rbuttons[k_nMaxReverseEntries];
SDL_GameControllerButton raxesasbutton[k_nMaxReverseEntries];
SDL_GameControllerButton rhatasbutton[k_nMaxHatEntries];
75
76
77
78
79
80
81
};
/* our hard coded list of mapping support */
typedef struct _ControllerMapping_t
{
82
83
84
85
SDL_JoystickGUID guid;
char *name;
char *mapping;
struct _ControllerMapping_t *next;
86
87
88
89
90
91
} ControllerMapping_t;
/* default mappings we support */
const char *s_ControllerMappings [] =
{
92
#ifdef SDL_JOYSTICK_DINPUT
93
94
95
96
97
"xinput,X360 Controller,a:b10,b:b11,y:b13,x:b12,start:b4,guide:b14,back:b5,dpup:b0,dpleft:b2,dpdown:b1,dpright:b3,leftshoulder:b8,rightshoulder:b9,leftstick:b6,rightstick:b7,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:a4,righttrigger:a5",
"341a3608000000000000504944564944,Afterglow PS3 Controller,a:b1,b:b2,y:b3,x:b0,start:b9,guide:b12,back:b8,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftshoulder:b4,rightshoulder:b5,leftstick:b10,rightstick:b11,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7",
"88880803000000000000504944564944,PS3 Controller,a:b2,b:b1,x:b0,y:b3,start:b11,back:b8,leftstick:b9,rightstick:b10,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.4,dpdown:h0.8,dpright:h0.2,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:b6,righttrigger:b7,guide:b12",
"4c056802000000000000504944564944,PS3 Controller,a:b14,b:b13,y:b12,x:b15,start:b3,guide:b16,back:b0,leftstick:b1,rightstick:b2,leftshoulder:b10,rightshoulder:b11,dpup:b4,dpleft:b7,dpdown:b6,dpright:b5,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b8,righttrigger:b9,",
"25090500000000000000504944564944,PS3 DualShock,a:b2,b:b1,x:b0,y:b3,start:b8,guide:,back:b9,leftstick:b10,rightstick:b11,leftshoulder:b6,rightshoulder:b7,dpup:h0.1,dpleft:h0.4,dpdown:h0.8,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b4,righttrigger:b5",
98
"ffff0000000000000000504944564944,GameStop Gamepad,a:b0,b:b1,y:b3,x:b2,start:b9,guide:,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,",
99
"6d0419c2000000000000504944564944,Logitech F710 Gamepad,a:b1,b:b2,y:b3,x:b0,start:b9,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,", /* Guide button doesn't seem to be sent in DInput mode. */
100
"6d0416c2000000000000504944564944,Generic DirectInput Controller,a:b1,b:b2,y:b3,x:b0,start:b9,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,",
101
#elif defined(__MACOSX__)
102
"5e040000000000008e02000000000000,X360 Controller,a:b0,b:b1,y:b3,x:b2,start:b8,guide:b10,back:b9,dpup:b11,dpleft:b13,dpdown:b12,dpright:b14,leftshoulder:b4,rightshoulder:b5,leftstick:b6,rightstick:b7,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5",
103
"4c050000000000006802000000000000,PS3 Controller,a:b14,b:b13,x:b15,y:b12,start:b3,guide:b16,back:b0,leftstick:b1,rightstick:b2,leftshoulder:b10,rightshoulder:b11,dpup:b4,dpleft:b7,dpdown:b6,dpright:b5,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b8,righttrigger:b9",
104
"0500000047532047616d657061640000,GameStop Gamepad,a:b0,b:b1,y:b3,x:b2,start:b9,guide:,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,",
105
106
107
"6d040000000000001fc2000000000000,Logitech F710 Gamepad (XInput),a:b0,b:b1,y:b3,x:b2,start:b8,guide:b10,back:b9,leftstick:b6,rightstick:b7,leftshoulder:b4,rightshoulder:b5,dpup:b11,dpleft:b13,dpdown:b12,dpright:b14,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5,",
"6d0400000000000016c2000000000000,Logitech F310 Gamepad (DInput),a:b1,b:b2,y:b3,x:b0,start:b9,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,", /* Guide button doesn't seem to be sent in DInput mode. */
"6d0400000000000019c2000000000000,Logitech Wireless Gamepad (DInput),a:b1,b:b2,y:b3,x:b0,start:b9,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,", /* This includes F710 in DInput mode and the "Logitech Cordless RumblePad 2", at the very least. */
108
"6d0400000000000018c2000000000000,Logitech Rumble Gamepad F510(DInput),a:b1,b:b2,y:b3,x:b0,start:b9,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,rightx:a2,lefty:a1,righty:a3,lefttrigger:b6,righttrigger:b7,",
109
#elif defined(__LINUX__)
110
"030000005e0400008e02000014010000,X360 Controller,a:b0,b:b1,y:b3,x:b2,start:b7,guide:b8,back:b6,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftshoulder:b4,rightshoulder:b5,leftstick:b9,rightstick:b10,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5",
111
112
"030000005e0400008e02000010010000,X360 Controller,a:b0,b:b1,y:b3,x:b2,start:b7,guide:b8,back:b6,leftstick:b9,rightstick:b10,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5,",
"030000005e0400001907000000010000,X360 Wireless Controller,a:b0,b:b1,y:b3,x:b2,start:b7,guide:b8,back:b6,leftstick:b9,rightstick:b10,leftshoulder:b4,rightshoulder:b5,dpup:b13,dpleft:b11,dpdown:b14,dpright:b12,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5,",
113
"030000004c0500006802000011010000,PS3 Controller,a:b14,b:b13,x:b15,y:b12,start:b3,guide:b16,back:b0,leftstick:b1,rightstick:b2,leftshoulder:b10,rightshoulder:b11,dpup:b4,dpleft:b7,dpdown:b6,dpright:b5,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b8,righttrigger:b9",
114
115
"030000006d0400001fc2000005030000,Logitech F710 Gamepad (XInput),a:b0,b:b1,y:b3,x:b2,start:b7,guide:b8,back:b6,leftstick:b9,rightstick:b10,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5,",
"030000006d04000019c2000011010000,Logitech F710 Gamepad (DInput),a:b1,b:b2,y:b3,x:b0,start:b9,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,", /* Guide button doesn't seem to be sent in DInput mode. */
116
"030000006d0400001dc2000014400000,Logitech F310 Gamepad (XInput),a:b0,b:b1,y:b3,x:b2,start:b7,guide:b8,back:b6,leftstick:b9,rightstick:b10,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5,",
117
"030000006d04000019c2000010010000,Logitech Cordless RumblePad 2,a:b1,b:b2,y:b3,x:b0,start:b9,guide:,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,",
118
"0500000047532047616d657061640000,GameStop Gamepad,a:b0,b:b1,y:b3,x:b2,start:b9,guide:,back:b8,leftstick:b10,rightstick:b11,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b6,righttrigger:b7,",
119
"03000000ba2200002010000001010000,Jess Technology USB Game Controller,start:b9,a:b2,b:b1,x:b3,y:b0,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a3,righty:a2,lefttrigger:b6,righttrigger:b7,leftshoulder:b4,rightshoulder:b5,guide:,back:b8",
120
"030000006d0400001ec2000020200000,Logitech Rumble Gamepad F510 (XInput),a:b0,b:b1,x:b2,y:b3,start:b7,back:b6,guide:b8,leftstick:b9,rightstick:b10,leftshoulder:b4,rightshoulder:b5,dpup:h0.1,dpleft:h0.8,dpdown:h0.4,dpright:h0.2,leftx:a0,lefty:a1,rightx:a3,righty:a4,lefttrigger:a2,righttrigger:a5,",
121
#endif
122
NULL
123
124
125
};
static ControllerMapping_t *s_pSupportedControllers = NULL;
126
#ifdef SDL_JOYSTICK_DINPUT
127
static ControllerMapping_t *s_pXInputMapping = NULL;
128
#endif
129
130
131
132
/* The SDL game controller structure */
struct _SDL_GameController
{
133
134
135
136
137
SDL_Joystick *joystick; /* underlying joystick device */
int ref_count;
Uint8 hatState[4]; /* the current hat state for this controller */
struct _SDL_ControllerMapping mapping; /* the mapping object for this controller */
struct _SDL_GameController *next; /* pointer to next game controller we have allocated */
138
139
140
};
141
int SDL_PrivateGameControllerAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis, Sint16 value);
142
int SDL_PrivateGameControllerButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button, Uint8 state);
143
144
145
146
147
148
/*
* Event filter to fire controller events from joystick ones
*/
int SDL_GameControllerEventWatcher(void *userdata, SDL_Event * event)
{
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
switch( event->type )
{
case SDL_JOYAXISMOTION:
{
SDL_GameController *controllerlist;
if ( event->jaxis.axis >= k_nMaxReverseEntries ) break;
controllerlist = SDL_gamecontrollers;
while ( controllerlist )
{
if ( controllerlist->joystick->instance_id == event->jaxis.which )
{
if ( controllerlist->mapping.raxes[event->jaxis.axis] >= 0 ) /* simple axis to axis, send it through */
{
SDL_GameControllerAxis axis = controllerlist->mapping.raxes[event->jaxis.axis];
165
Sint16 value = event->jaxis.value;
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
switch (axis)
{
case SDL_CONTROLLER_AXIS_TRIGGERLEFT:
case SDL_CONTROLLER_AXIS_TRIGGERRIGHT:
/* Shift it to be 0 - 32767. */
value = value / 2 + 16384;
default:
break;
}
SDL_PrivateGameControllerAxis( controllerlist, axis, value );
}
else if ( controllerlist->mapping.raxesasbutton[event->jaxis.axis] >= 0 ) /* simulate an axis as a button */
{
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.raxesasbutton[event->jaxis.axis], ABS(event->jaxis.value) > 32768/2 ? SDL_PRESSED : SDL_RELEASED );
}
break;
}
controllerlist = controllerlist->next;
}
}
break;
case SDL_JOYBUTTONDOWN:
case SDL_JOYBUTTONUP:
{
SDL_GameController *controllerlist;
if ( event->jbutton.button >= k_nMaxReverseEntries ) break;
controllerlist = SDL_gamecontrollers;
while ( controllerlist )
{
if ( controllerlist->joystick->instance_id == event->jbutton.which )
{
if ( controllerlist->mapping.rbuttons[event->jbutton.button] >= 0 ) /* simple button as button */
{
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rbuttons[event->jbutton.button], event->jbutton.state );
}
else if ( controllerlist->mapping.rbuttonasaxis[event->jbutton.button] >= 0 ) /* an button pretending to be an axis */
{
SDL_PrivateGameControllerAxis( controllerlist, controllerlist->mapping.rbuttonasaxis[event->jbutton.button], event->jbutton.state > 0 ? 32767 : 0 );
}
break;
}
controllerlist = controllerlist->next;
}
}
break;
case SDL_JOYHATMOTION:
{
SDL_GameController *controllerlist;
if ( event->jhat.hat >= 4 ) break;
controllerlist = SDL_gamecontrollers;
while ( controllerlist )
{
if ( controllerlist->joystick->instance_id == event->jhat.which )
{
Uint8 bSame = controllerlist->hatState[event->jhat.hat] & event->jhat.value;
/* Get list of removed bits (button release) */
Uint8 bChanged = controllerlist->hatState[event->jhat.hat] ^ bSame;
/* the hat idx in the high nibble */
int bHighHat = event->jhat.hat << 4;
if ( bChanged & SDL_HAT_DOWN )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_DOWN], SDL_RELEASED );
if ( bChanged & SDL_HAT_UP )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_UP], SDL_RELEASED );
if ( bChanged & SDL_HAT_LEFT )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_LEFT], SDL_RELEASED );
if ( bChanged & SDL_HAT_RIGHT )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_RIGHT], SDL_RELEASED );
/* Get list of added bits (button press) */
bChanged = event->jhat.value ^ bSame;
if ( bChanged & SDL_HAT_DOWN )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_DOWN], SDL_PRESSED );
if ( bChanged & SDL_HAT_UP )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_UP], SDL_PRESSED );
if ( bChanged & SDL_HAT_LEFT )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_LEFT], SDL_PRESSED );
if ( bChanged & SDL_HAT_RIGHT )
SDL_PrivateGameControllerButton( controllerlist, controllerlist->mapping.rhatasbutton[bHighHat | SDL_HAT_RIGHT], SDL_PRESSED );
/* update our state cache */
controllerlist->hatState[event->jhat.hat] = event->jhat.value;
break;
}
controllerlist = controllerlist->next;
}
}
break;
case SDL_JOYDEVICEADDED:
{
if ( SDL_IsGameController(event->jdevice.which ) )
{
SDL_Event deviceevent;
deviceevent.type = SDL_CONTROLLERDEVICEADDED;
deviceevent.cdevice.which = event->jdevice.which;
SDL_PushEvent(&deviceevent);
}
}
break;
case SDL_JOYDEVICEREMOVED:
{
SDL_GameController *controllerlist = SDL_gamecontrollers;
while ( controllerlist )
{
if ( controllerlist->joystick->instance_id == event->jdevice.which )
{
SDL_Event deviceevent;
deviceevent.type = SDL_CONTROLLERDEVICEREMOVED;
deviceevent.cdevice.which = event->jdevice.which;
SDL_PushEvent(&deviceevent);
break;
}
controllerlist = controllerlist->next;
}
}
break;
default:
break;
}
return 1;
293
294
295
}
/*
296
* Helper function to scan the mappings database for a controller with the specified GUID
297
*/
298
ControllerMapping_t *SDL_PrivateGetControllerMappingForGUID(SDL_JoystickGUID *guid)
299
{
300
301
302
303
304
305
306
307
308
ControllerMapping_t *pSupportedController = s_pSupportedControllers;
while ( pSupportedController )
{
if ( !SDL_memcmp( guid, &pSupportedController->guid, sizeof(*guid) ) )
{
return pSupportedController;
}
pSupportedController = pSupportedController->next;
}
309
310
return NULL;
}
311
312
/*
313
* Helper function to determine pre-calculated offset to certain joystick mappings
314
315
316
*/
ControllerMapping_t *SDL_PrivateGetControllerMapping(int device_index)
{
317
#ifdef SDL_JOYSTICK_DINPUT
318
319
320
321
322
if ( SDL_SYS_IsXInputDeviceIndex(device_index) && s_pXInputMapping )
{
return s_pXInputMapping;
}
else
323
#endif
324
325
326
327
{
SDL_JoystickGUID jGUID = SDL_JoystickGetDeviceGUID( device_index );
return SDL_PrivateGetControllerMappingForGUID(&jGUID);
}
328
329
return NULL;
330
331
}
332
333
334
335
336
337
338
339
340
341
static const char* map_StringForControllerAxis[] = {
"leftx",
"lefty",
"rightx",
"righty",
"lefttrigger",
"righttrigger",
NULL
};
342
343
344
/*
* convert a string to its enum equivalent
*/
345
SDL_GameControllerAxis SDL_GameControllerGetAxisFromString( const char *pchString )
346
{
347
int entry;
348
349
if ( !pchString || !pchString[0] )
return SDL_CONTROLLER_AXIS_INVALID;
350
351
352
353
354
355
for ( entry = 0; map_StringForControllerAxis[entry]; ++entry)
{
if ( !SDL_strcasecmp( pchString, map_StringForControllerAxis[entry] ) )
return entry;
}
356
return SDL_CONTROLLER_AXIS_INVALID;
357
358
}
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
/*
* convert an enum to its string equivalent
*/
const char* SDL_GameControllerGetStringForAxis( SDL_GameControllerAxis axis )
{
if (axis > SDL_CONTROLLER_AXIS_INVALID && axis < SDL_CONTROLLER_AXIS_MAX)
{
return map_StringForControllerAxis[axis];
}
return NULL;
}
static const char* map_StringForControllerButton[] = {
"a",
"b",
"x",
"y",
"back",
"guide",
"start",
"leftstick",
"rightstick",
"leftshoulder",
"rightshoulder",
"dpup",
"dpdown",
"dpleft",
"dpright",
NULL
};
389
390
391
392
/*
* convert a string to its enum equivalent
*/
393
SDL_GameControllerButton SDL_GameControllerGetButtonFromString( const char *pchString )
394
{
395
int entry;
396
397
if ( !pchString || !pchString[0] )
return SDL_CONTROLLER_BUTTON_INVALID;
398
399
for ( entry = 0; map_StringForControllerButton[entry]; ++entry)
400
401
402
403
404
{
if ( !SDL_strcasecmp( pchString, map_StringForControllerButton[entry] ) )
return entry;
}
return SDL_CONTROLLER_BUTTON_INVALID;
405
406
}
407
408
409
410
411
412
413
414
415
416
417
/*
* convert an enum to its string equivalent
*/
const char* SDL_GameControllerGetStringForButton( SDL_GameControllerButton axis )
{
if (axis > SDL_CONTROLLER_BUTTON_INVALID && axis < SDL_CONTROLLER_BUTTON_MAX)
{
return map_StringForControllerButton[axis];
}
return NULL;
}
418
419
420
421
422
423
/*
* given a controller button name and a joystick name update our mapping structure with it
*/
void SDL_PrivateGameControllerParseButton( const char *szGameButton, const char *szJoystickButton, struct _SDL_ControllerMapping *pMapping )
{
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
int iSDLButton = 0;
SDL_GameControllerButton button;
SDL_GameControllerAxis axis;
button = SDL_GameControllerGetButtonFromString( szGameButton );
axis = SDL_GameControllerGetAxisFromString( szGameButton );
iSDLButton = SDL_atoi( &szJoystickButton[1] );
if ( szJoystickButton[0] == 'a' )
{
if ( iSDLButton >= k_nMaxReverseEntries )
{
SDL_SetError("Axis index too large: %d", iSDLButton );
return;
}
if ( axis != SDL_CONTROLLER_AXIS_INVALID )
{
pMapping->axes[ axis ] = iSDLButton;
pMapping->raxes[ iSDLButton ] = axis;
}
else if ( button != SDL_CONTROLLER_BUTTON_INVALID )
{
pMapping->axesasbutton[ button ] = iSDLButton;
pMapping->raxesasbutton[ iSDLButton ] = button;
}
else
{
SDL_assert( !"How did we get here?" );
}
}
else if ( szJoystickButton[0] == 'b' )
{
if ( iSDLButton >= k_nMaxReverseEntries )
{
SDL_SetError("Button index too large: %d", iSDLButton );
return;
}
if ( button != SDL_CONTROLLER_BUTTON_INVALID )
{
pMapping->buttons[ button ] = iSDLButton;
pMapping->rbuttons[ iSDLButton ] = button;
}
else if ( axis != SDL_CONTROLLER_AXIS_INVALID )
{
pMapping->buttonasaxis[ axis ] = iSDLButton;
pMapping->rbuttonasaxis[ iSDLButton ] = axis;
}
else
{
SDL_assert( !"How did we get here?" );
}
}
else if ( szJoystickButton[0] == 'h' )
{
int hat = SDL_atoi( &szJoystickButton[1] );
int mask = SDL_atoi( &szJoystickButton[3] );
if (hat >= 4) {
SDL_SetError("Hat index too large: %d", iSDLButton );
}
if ( button != SDL_CONTROLLER_BUTTON_INVALID )
{
486
int ridx;
487
488
489
490
491
492
493
494
495
496
497
498
499
500
pMapping->hatasbutton[ button ].hat = hat;
pMapping->hatasbutton[ button ].mask = mask;
ridx = (hat << 4) | mask;
pMapping->rhatasbutton[ ridx ] = button;
}
else if ( axis != SDL_CONTROLLER_AXIS_INVALID )
{
SDL_assert( !"Support hat as axis" );
}
else
{
SDL_assert( !"How did we get here?" );
}
}
501
502
503
504
505
506
507
508
509
}
/*
* given a controller mapping string update our mapping object
*/
static void
SDL_PrivateGameControllerParseControllerConfigString( struct _SDL_ControllerMapping *pMapping, const char *pchString )
{
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
char szGameButton[20];
char szJoystickButton[20];
SDL_bool bGameButton = SDL_TRUE;
int i = 0;
const char *pchPos = pchString;
SDL_memset( szGameButton, 0x0, sizeof(szGameButton) );
SDL_memset( szJoystickButton, 0x0, sizeof(szJoystickButton) );
while ( pchPos && *pchPos )
{
if ( *pchPos == ':' )
{
i = 0;
bGameButton = SDL_FALSE;
}
else if ( *pchPos == ' ' )
{
}
else if ( *pchPos == ',' )
{
i = 0;
bGameButton = SDL_TRUE;
SDL_PrivateGameControllerParseButton( szGameButton, szJoystickButton, pMapping );
SDL_memset( szGameButton, 0x0, sizeof(szGameButton) );
SDL_memset( szJoystickButton, 0x0, sizeof(szJoystickButton) );
}
else if ( bGameButton )
{
if ( i >= sizeof(szGameButton))
{
SDL_SetError( "Button name too large: %s", szGameButton );
return;
}
szGameButton[i] = *pchPos;
i++;
}
else
{
if ( i >= sizeof(szJoystickButton))
{
SDL_SetError( "Joystick button name too large: %s", szJoystickButton );
return;
}
szJoystickButton[i] = *pchPos;
i++;
}
pchPos++;
}
SDL_PrivateGameControllerParseButton( szGameButton, szJoystickButton, pMapping );
563
564
565
566
567
568
}
/*
* Make a new button mapping struct
*/
569
void SDL_PrivateLoadButtonMapping( struct _SDL_ControllerMapping *pMapping, SDL_JoystickGUID guid, const char *pchName, const char *pchMapping )
570
{
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
int j;
pMapping->guid = guid;
pMapping->name = pchName;
/* set all the button mappings to non defaults */
for ( j = 0; j < SDL_CONTROLLER_AXIS_MAX; j++ )
{
pMapping->axes[j] = -1;
pMapping->buttonasaxis[j] = -1;
}
for ( j = 0; j < SDL_CONTROLLER_BUTTON_MAX; j++ )
{
pMapping->buttons[j] = -1;
pMapping->axesasbutton[j] = -1;
pMapping->hatasbutton[j].hat = -1;
}
for ( j = 0; j < k_nMaxReverseEntries; j++ )
{
pMapping->raxes[j] = SDL_CONTROLLER_AXIS_INVALID;
pMapping->rbuttonasaxis[j] = SDL_CONTROLLER_AXIS_INVALID;
pMapping->rbuttons[j] = SDL_CONTROLLER_BUTTON_INVALID;
pMapping->raxesasbutton[j] = SDL_CONTROLLER_BUTTON_INVALID;
}
for (j = 0; j < k_nMaxHatEntries; j++)
{
pMapping->rhatasbutton[j] = SDL_CONTROLLER_BUTTON_INVALID;
}
SDL_PrivateGameControllerParseControllerConfigString( pMapping, pchMapping );
603
604
605
606
607
608
609
610
}
/*
* grab the guid string from a mapping string
*/
char *SDL_PrivateGetControllerGUIDFromMappingString( const char *pMapping )
{
611
612
613
614
615
616
617
618
619
620
621
622
623
624
const char *pFirstComma = SDL_strchr( pMapping, ',' );
if ( pFirstComma )
{
char *pchGUID = SDL_malloc( pFirstComma - pMapping + 1 );
if ( !pchGUID )
{
SDL_OutOfMemory();
return NULL;
}
SDL_memcpy( pchGUID, pMapping, pFirstComma - pMapping );
pchGUID[ pFirstComma - pMapping ] = 0;
return pchGUID;
}
return NULL;
625
626
627
628
629
630
631
632
}
/*
* grab the name string from a mapping string
*/
char *SDL_PrivateGetControllerNameFromMappingString( const char *pMapping )
{
633
const char *pFirstComma, *pSecondComma;
634
635
636
637
638
639
char *pchName;
pFirstComma = SDL_strchr( pMapping, ',' );
if ( !pFirstComma )
return NULL;
640
pSecondComma = SDL_strchr( pFirstComma + 1, ',' );
641
642
643
644
645
646
647
648
649
650
651
652
if ( !pSecondComma )
return NULL;
pchName = SDL_malloc( pSecondComma - pFirstComma );
if ( !pchName )
{
SDL_OutOfMemory();
return NULL;
}
SDL_memcpy( pchName, pFirstComma + 1, pSecondComma - pFirstComma );
pchName[ pSecondComma - pFirstComma - 1 ] = 0;
return pchName;
653
654
655
656
657
658
}
/*
* grab the button mapping string from a mapping string
*/
659
char *SDL_PrivateGetControllerMappingFromMappingString( const char *pMapping )
660
{
661
const char *pFirstComma, *pSecondComma;
662
663
664
665
666
pFirstComma = SDL_strchr( pMapping, ',' );
if ( !pFirstComma )
return NULL;
667
pSecondComma = SDL_strchr( pFirstComma + 1, ',' );
668
669
670
if ( !pSecondComma )
return NULL;
671
return SDL_strdup(pSecondComma + 1); /* mapping is everything after the 3rd comma */
672
673
}
674
675
676
677
678
679
680
681
682
683
684
void SDL_PrivateGameControllerRefreshMapping( ControllerMapping_t *pControllerMapping )
{
SDL_GameController *gamecontrollerlist = SDL_gamecontrollers;
while ( gamecontrollerlist )
{
if ( !SDL_memcmp( &gamecontrollerlist->mapping.guid, &pControllerMapping->guid, sizeof(pControllerMapping->guid) ) )
{
SDL_Event event;
event.type = SDL_CONTROLLERDEVICEREMAPPED;
event.cdevice.which = gamecontrollerlist->joystick->instance_id;
SDL_PushEvent(&event);
685
686
/* Not really threadsafe. Should this lock access within SDL_GameControllerEventWatcher? */
687
688
SDL_PrivateLoadButtonMapping(&gamecontrollerlist->mapping, pControllerMapping->guid, pControllerMapping->name, pControllerMapping->mapping);
}
689
690
691
692
693
694
695
696
697
698
699
gamecontrollerlist = gamecontrollerlist->next;
}
}
/*
* Add or update an entry into the Mappings Database
*/
int
SDL_GameControllerAddMapping( const char *mappingString )
{
700
701
702
char *pchGUID;
char *pchName;
char *pchMapping;
703
704
705
706
707
708
SDL_JoystickGUID jGUID;
ControllerMapping_t *pControllerMapping;
#ifdef SDL_JOYSTICK_DINPUT
SDL_bool is_xinput_mapping = SDL_FALSE;
#endif
709
710
711
712
pchGUID = SDL_PrivateGetControllerGUIDFromMappingString( mappingString );
if (!pchGUID) {
return -1;
}
713
714
715
716
717
#ifdef SDL_JOYSTICK_DINPUT
if ( !SDL_strcasecmp( pchGUID, "xinput" ) ) {
is_xinput_mapping = SDL_TRUE;
}
#endif
718
jGUID = SDL_JoystickGetGUIDFromString(pchGUID);
719
720
SDL_free(pchGUID);
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
pControllerMapping = SDL_PrivateGetControllerMappingForGUID(&jGUID);
pchName = SDL_PrivateGetControllerNameFromMappingString( mappingString );
if (!pchName) return -1;
pchMapping = SDL_PrivateGetControllerMappingFromMappingString( mappingString );
if (!pchMapping) {
SDL_free( pchName );
return -1;
}
if (pControllerMapping) {
/* Update existing mapping */
SDL_free( pControllerMapping->name );
pControllerMapping->name = pchName;
SDL_free( pControllerMapping->mapping );
pControllerMapping->mapping = pchMapping;
/* refresh open controllers */
SDL_PrivateGameControllerRefreshMapping( pControllerMapping );
return 0;
} else {
pControllerMapping = SDL_malloc( sizeof(*pControllerMapping) );
if (!pControllerMapping) {
SDL_free( pchName );
SDL_free( pchMapping );
return SDL_OutOfMemory();
}
748
#ifdef SDL_JOYSTICK_DINPUT
749
750
751
752
if ( is_xinput_mapping )
{
s_pXInputMapping = pControllerMapping;
}
753
#endif
754
755
756
757
758
759
760
pControllerMapping->guid = jGUID;
pControllerMapping->name = pchName;
pControllerMapping->mapping = pchMapping;
pControllerMapping->next = s_pSupportedControllers;
s_pSupportedControllers = pControllerMapping;
return 1;
}
761
762
763
764
765
766
767
768
}
/*
* Get the mapping string for this GUID
*/
char *
SDL_GameControllerMappingForGUID( SDL_JoystickGUID guid )
{
769
770
771
772
char *pMappingString = NULL;
ControllerMapping_t *mapping = SDL_PrivateGetControllerMappingForGUID(&guid);
if (mapping) {
char pchGUID[33];
773
size_t needed;
774
775
776
777
778
779
780
SDL_JoystickGetGUIDString(guid, pchGUID, sizeof(pchGUID));
/* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */
needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1;
pMappingString = SDL_malloc( needed );
SDL_snprintf( pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping );
}
return pMappingString;
781
782
783
784
785
786
787
788
}
/*
* Get the mapping string for this device
*/
char *
SDL_GameControllerMapping( SDL_GameController * gamecontroller )
{
789
return SDL_GameControllerMappingForGUID( gamecontroller->mapping.guid );
790
}
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
static void
SDL_GameControllerLoadHints()
{
const char *hint = SDL_GetHint(SDL_HINT_GAMECONTROLLERCONFIG);
if ( hint && hint[0] ) {
int nchHints = SDL_strlen( hint );
char *pUserMappings = SDL_malloc( nchHints + 1 );
char *pTempMappings = pUserMappings;
SDL_memcpy( pUserMappings, hint, nchHints );
while ( pUserMappings ) {
char *pchNewLine = NULL;
pchNewLine = SDL_strchr( pUserMappings, '\n' );
if ( pchNewLine )
*pchNewLine = '\0';
SDL_GameControllerAddMapping( pUserMappings );
if ( pchNewLine )
pUserMappings = pchNewLine + 1;
else
pUserMappings = NULL;
}
SDL_free(pTempMappings);
}
}
819
820
821
822
823
824
/*
* Initialize the game controller system, mostly load our DB of controller config mappings
*/
int
SDL_GameControllerInit(void)
{
825
826
827
828
829
830
831
832
833
834
835
836
837
int i = 0;
const char *pMappingString = NULL;
s_pSupportedControllers = NULL;
pMappingString = s_ControllerMappings[i];
while ( pMappingString )
{
SDL_GameControllerAddMapping( pMappingString );
i++;
pMappingString = s_ControllerMappings[i];
}
/* load in any user supplied config */
838
SDL_GameControllerLoadHints();
839
840
841
/* watch for joy events and fire controller ones if needed */
SDL_AddEventWatch( SDL_GameControllerEventWatcher, NULL );
842
843
return (0);
844
845
846
847
848
849
850
851
852
}
/*
* Get the implementation dependent name of a controller
*/
const char *
SDL_GameControllerNameForIndex(int device_index)
{
853
854
855
856
857
ControllerMapping_t *pSupportedController = SDL_PrivateGetControllerMapping(device_index);
if ( pSupportedController )
{
return pSupportedController->name;
}
858
859
860
861
862
863
864
return NULL;
}
/*
* Return 1 if the joystick at this device index is a supported controller
*/
865
866
SDL_bool
SDL_IsGameController(int device_index)
867
{
868
869
870
871
872
ControllerMapping_t *pSupportedController = SDL_PrivateGetControllerMapping(device_index);
if ( pSupportedController )
{
return SDL_TRUE;
}
873
874
return SDL_FALSE;
875
876
877
878
879
880
881
882
883
884
885
886
887
}
/*
* Open a controller for use - the index passed as an argument refers to
* the N'th controller on the system. This index is the value which will
* identify this controller in future controller events.
*
* This function returns a controller identifier, or NULL if an error occurred.
*/
SDL_GameController *
SDL_GameControllerOpen(int device_index)
{
SDL_GameController *gamecontroller;
888
889
SDL_GameController *gamecontrollerlist;
ControllerMapping_t *pSupportedController = NULL;
890
891
892
893
894
895
if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
return (NULL);
}
896
897
898
899
900
901
902
903
904
905
gamecontrollerlist = SDL_gamecontrollers;
/* If the controller is already open, return it */
while ( gamecontrollerlist )
{
if ( SDL_SYS_GetInstanceIdOfDeviceIndex(device_index) == gamecontrollerlist->joystick->instance_id ) {
gamecontroller = gamecontrollerlist;
++gamecontroller->ref_count;
return (gamecontroller);
}
gamecontrollerlist = gamecontrollerlist->next;
906
907
}
908
909
910
911
912
913
/* Find a controller mapping */
pSupportedController = SDL_PrivateGetControllerMapping(device_index);
if ( !pSupportedController ) {
SDL_SetError("Couldn't find mapping for device (%d)", device_index );
return (NULL);
}
914
915
916
917
918
919
920
/* Create and initialize the joystick */
gamecontroller = (SDL_GameController *) SDL_malloc((sizeof *gamecontroller));
if (gamecontroller == NULL) {
SDL_OutOfMemory();
return NULL;
}
921
922
923
SDL_memset(gamecontroller, 0, (sizeof *gamecontroller));
gamecontroller->joystick = SDL_JoystickOpen(device_index);
924
if ( !gamecontroller->joystick ) {
925
926
927
928
SDL_free(gamecontroller);
return NULL;
}
929
SDL_PrivateLoadButtonMapping( &gamecontroller->mapping, pSupportedController->guid, pSupportedController->name, pSupportedController->mapping );
930
931
/* Add joystick to list */
932
++gamecontroller->ref_count;
933
934
935
/* Link the joystick in the list */
gamecontroller->next = SDL_gamecontrollers;
SDL_gamecontrollers = gamecontroller;
936
937
SDL_SYS_JoystickUpdate( gamecontroller->joystick );
938
939
940
941
return (gamecontroller);
}
942
943
944
945
946
947
948
949
950
951
/*
* Manually pump for controller updates.
*/
void
SDL_GameControllerUpdate(void)
{
/* Just for API completeness; the joystick API does all the work. */
SDL_JoystickUpdate();
}
952
953
954
955
956
/*
* Get the current state of an axis control on a controller
*/
Sint16
957
SDL_GameControllerGetAxis(SDL_GameController * gamecontroller, SDL_GameControllerAxis axis)
958
{
959
960
961
962
963
if ( !gamecontroller )
return 0;
if (gamecontroller->mapping.axes[axis] >= 0 )
{
964
965
966
967
968
969
970
971
972
973
974
Sint16 value = ( SDL_JoystickGetAxis( gamecontroller->joystick, gamecontroller->mapping.axes[axis]) );
switch (axis)
{
case SDL_CONTROLLER_AXIS_TRIGGERLEFT:
case SDL_CONTROLLER_AXIS_TRIGGERRIGHT:
/* Shift it to be 0 - 32767. */
value = value / 2 + 16384;
default:
break;
}
return value;
975
976
977
978
979
980
981
982
983
984
}
else if (gamecontroller->mapping.buttonasaxis[axis] >= 0 )
{
Uint8 value;
value = SDL_JoystickGetButton( gamecontroller->joystick, gamecontroller->mapping.buttonasaxis[axis] );
if ( value > 0 )
return 32767;
return 0;
}
return 0;
985
986
987
988
989
990
991
}
/*
* Get the current state of a button on a controller
*/
Uint8
992
SDL_GameControllerGetButton(SDL_GameController * gamecontroller, SDL_GameControllerButton button)
993
{
994
995
996
997
998
999
1000
if ( !gamecontroller )
return 0;
if ( gamecontroller->mapping.buttons[button] >= 0 )
{
return ( SDL_JoystickGetButton( gamecontroller->joystick, gamecontroller->mapping.buttons[button] ) );
}