src/platform/sdl/sdl-events.c (view raw)
1/* Copyright (c) 2013-2014 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "sdl-events.h"
7
8#include "debugger/debugger.h"
9#include "gba/io.h"
10#include "gba/supervisor/rr.h"
11#include "gba/serialize.h"
12#include "gba/video.h"
13#include "gba/renderers/video-software.h"
14#include "util/configuration.h"
15#include "util/formatting.h"
16#include "util/vfs.h"
17
18#if SDL_VERSION_ATLEAST(2, 0, 0) && defined(__APPLE__)
19#define GUI_MOD KMOD_GUI
20#else
21#define GUI_MOD KMOD_CTRL
22#endif
23
24#define GYRO_STEPS 100
25
26static void _GBASDLSetRumble(struct GBARumble* rumble, int enable);
27static int32_t _GBASDLReadTiltX(struct GBARotationSource* rumble);
28static int32_t _GBASDLReadTiltY(struct GBARotationSource* rumble);
29static int32_t _GBASDLReadGyroZ(struct GBARotationSource* rumble);
30static void _GBASDLRotationSample(struct GBARotationSource* source);
31
32bool GBASDLInitEvents(struct GBASDLEvents* context) {
33 int subsystem = SDL_INIT_JOYSTICK;
34#if SDL_VERSION_ATLEAST(2, 0, 0)
35 subsystem |= SDL_INIT_HAPTIC;
36#endif
37 if (SDL_InitSubSystem(subsystem) < 0) {
38 return false;
39 }
40
41 SDL_JoystickEventState(SDL_ENABLE);
42 int nJoysticks = SDL_NumJoysticks();
43 if (nJoysticks > 0) {
44 context->nJoysticks = nJoysticks;
45 context->joysticks = calloc(context->nJoysticks, sizeof(SDL_Joystick*));
46#if SDL_VERSION_ATLEAST(2, 0, 0)
47 context->haptic = calloc(context->nJoysticks, sizeof(SDL_Haptic*));
48#endif
49 size_t i;
50 for (i = 0; i < context->nJoysticks; ++i) {
51 context->joysticks[i] = SDL_JoystickOpen(i);
52#if SDL_VERSION_ATLEAST(2, 0, 0)
53 context->haptic[i] = SDL_HapticOpenFromJoystick(context->joysticks[i]);
54#endif
55 }
56 } else {
57 context->nJoysticks = 0;
58 context->joysticks = 0;
59 }
60
61 context->playersAttached = 0;
62
63 size_t i;
64 for (i = 0; i < MAX_PLAYERS; ++i) {
65 context->preferredJoysticks[i] = 0;
66 context->joysticksClaimed[i] = SIZE_MAX;
67 }
68
69#if !SDL_VERSION_ATLEAST(2, 0, 0)
70 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
71#endif
72 return true;
73}
74
75void GBASDLDeinitEvents(struct GBASDLEvents* context) {
76 size_t i;
77 for (i = 0; i < context->nJoysticks; ++i) {
78#if SDL_VERSION_ATLEAST(2, 0, 0)
79 SDL_HapticClose(context->haptic[i]);
80#endif
81 SDL_JoystickClose(context->joysticks[i]);
82 }
83
84 SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
85}
86
87void GBASDLEventsLoadConfig(struct GBASDLEvents* context, const struct Configuration* config) {
88 context->preferredJoysticks[0] = GBAInputGetPreferredDevice(config, SDL_BINDING_BUTTON, 0);
89 context->preferredJoysticks[1] = GBAInputGetPreferredDevice(config, SDL_BINDING_BUTTON, 1);
90 context->preferredJoysticks[2] = GBAInputGetPreferredDevice(config, SDL_BINDING_BUTTON, 2);
91 context->preferredJoysticks[3] = GBAInputGetPreferredDevice(config, SDL_BINDING_BUTTON, 3);
92}
93
94void GBASDLInitBindings(struct GBAInputMap* inputMap) {
95#ifdef BUILD_PANDORA
96 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_PAGEDOWN, GBA_KEY_A);
97 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_END, GBA_KEY_B);
98 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_RSHIFT, GBA_KEY_L);
99 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_RCTRL, GBA_KEY_R);
100 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_LALT, GBA_KEY_START);
101 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_LCTRL, GBA_KEY_SELECT);
102 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_UP, GBA_KEY_UP);
103 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_DOWN, GBA_KEY_DOWN);
104 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_LEFT, GBA_KEY_LEFT);
105 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_RIGHT, GBA_KEY_RIGHT);
106#elif SDL_VERSION_ATLEAST(2, 0, 0)
107 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_X, GBA_KEY_A);
108 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_Z, GBA_KEY_B);
109 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_A, GBA_KEY_L);
110 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_S, GBA_KEY_R);
111 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_RETURN, GBA_KEY_START);
112 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_BACKSPACE, GBA_KEY_SELECT);
113 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_UP, GBA_KEY_UP);
114 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_DOWN, GBA_KEY_DOWN);
115 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_LEFT, GBA_KEY_LEFT);
116 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDL_SCANCODE_RIGHT, GBA_KEY_RIGHT);
117#else
118 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_x, GBA_KEY_A);
119 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_z, GBA_KEY_B);
120 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_a, GBA_KEY_L);
121 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_s, GBA_KEY_R);
122 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_RETURN, GBA_KEY_START);
123 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_BACKSPACE, GBA_KEY_SELECT);
124 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_UP, GBA_KEY_UP);
125 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_DOWN, GBA_KEY_DOWN);
126 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_LEFT, GBA_KEY_LEFT);
127 GBAInputBindKey(inputMap, SDL_BINDING_KEY, SDLK_RIGHT, GBA_KEY_RIGHT);
128#endif
129
130 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 13, GBA_KEY_A);
131 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 14, GBA_KEY_B);
132 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 10, GBA_KEY_L);
133 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 11, GBA_KEY_R);
134 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 3, GBA_KEY_START);
135 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 0, GBA_KEY_SELECT);
136 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 4, GBA_KEY_UP);
137 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 6, GBA_KEY_DOWN);
138 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 7, GBA_KEY_LEFT);
139 GBAInputBindKey(inputMap, SDL_BINDING_BUTTON, 5, GBA_KEY_RIGHT);
140
141 struct GBAAxis description = { GBA_KEY_RIGHT, GBA_KEY_LEFT, 0x4000, -0x4000 };
142 GBAInputBindAxis(inputMap, SDL_BINDING_BUTTON, 0, &description);
143 description = (struct GBAAxis) { GBA_KEY_DOWN, GBA_KEY_UP, 0x4000, -0x4000 };
144 GBAInputBindAxis(inputMap, SDL_BINDING_BUTTON, 1, &description);
145}
146
147bool GBASDLAttachPlayer(struct GBASDLEvents* events, struct GBASDLPlayer* player) {
148 player->joystick = 0;
149 player->joystickIndex = SIZE_MAX;
150
151#if SDL_VERSION_ATLEAST(2, 0, 0)
152 player->rumble.d.setRumble = _GBASDLSetRumble;
153 player->rumble.p = player;
154#endif
155
156 player->rotation.d.readTiltX = _GBASDLReadTiltX;
157 player->rotation.d.readTiltY = _GBASDLReadTiltY;
158 player->rotation.d.readGyroZ = _GBASDLReadGyroZ;
159 player->rotation.d.sample = _GBASDLRotationSample;
160 player->rotation.axisX = 2;
161 player->rotation.axisY = 3;
162 player->rotation.gyroSensitivity = 2.2e9f;
163 player->rotation.gyroX = 0;
164 player->rotation.gyroY = 1;
165 player->rotation.zDelta = 0;
166 CircleBufferInit(&player->rotation.zHistory, sizeof(float) * GYRO_STEPS);
167 player->rotation.p = player;
168
169 if (events->playersAttached >= MAX_PLAYERS) {
170 return false;
171 }
172
173 player->playerId = events->playersAttached;
174 size_t firstUnclaimed = SIZE_MAX;
175
176 size_t i;
177 for (i = 0; i < events->nJoysticks; ++i) {
178 bool claimed = false;
179
180 int p;
181 for (p = 0; p < events->playersAttached; ++p) {
182 if (events->joysticksClaimed[p] == i) {
183 claimed = true;
184 break;
185 }
186 }
187 if (claimed) {
188 continue;
189 }
190
191 if (firstUnclaimed == SIZE_MAX) {
192 firstUnclaimed = i;
193 }
194
195 const char* joystickName;
196#if SDL_VERSION_ATLEAST(2, 0, 0)
197 joystickName = SDL_JoystickName(events->joysticks[i]);
198#else
199 joystickName = SDL_JoystickName(SDL_JoystickIndex(events->joysticks[i]));
200#endif
201 if (events->preferredJoysticks[player->playerId] && strcmp(events->preferredJoysticks[player->playerId], joystickName) == 0) {
202 player->joystickIndex = i;
203 break;
204 }
205 }
206
207 if (player->joystickIndex == SIZE_MAX && firstUnclaimed != SIZE_MAX) {
208 player->joystickIndex = firstUnclaimed;
209 }
210
211 if (player->joystickIndex != SIZE_MAX) {
212 player->joystick = events->joysticks[player->joystickIndex];
213 events->joysticksClaimed[player->playerId] = player->joystickIndex;
214
215#if SDL_VERSION_ATLEAST(2, 0, 0)
216 player->haptic = events->haptic[player->joystickIndex];
217 if (player->haptic) {
218 SDL_HapticRumbleInit(player->haptic);
219 }
220#endif
221 }
222
223 ++events->playersAttached;
224 return true;
225}
226
227void GBASDLDetachPlayer(struct GBASDLEvents* events, struct GBASDLPlayer* player) {
228 events->joysticksClaimed[player->playerId] = SIZE_MAX;
229 CircleBufferDeinit(&player->rotation.zHistory);
230}
231
232void GBASDLPlayerLoadConfig(struct GBASDLPlayer* context, const struct Configuration* config) {
233 GBAInputMapLoad(context->bindings, SDL_BINDING_KEY, config);
234 if (context->joystick) {
235 GBAInputMapLoad(context->bindings, SDL_BINDING_BUTTON, config);
236#if SDL_VERSION_ATLEAST(2, 0, 0)
237 const char* name = SDL_JoystickName(context->joystick);
238#else
239 const char* name = SDL_JoystickName(SDL_JoystickIndex(context->joystick));
240#endif
241 GBAInputProfileLoad(context->bindings, SDL_BINDING_BUTTON, config, name);
242
243 const char* value;
244 char* end;
245 int numAxes = SDL_JoystickNumAxes(context->joystick);
246 int axis;
247 value = GBAInputGetCustomValue(config, SDL_BINDING_BUTTON, "tiltAxisX", name);
248 if (value) {
249 axis = strtol(value, &end, 0);
250 if (axis >= 0 && axis < numAxes && end && !*end) {
251 context->rotation.axisX = axis;
252 }
253 }
254 value = GBAInputGetCustomValue(config, SDL_BINDING_BUTTON, "tiltAxisY", name);
255 if (value) {
256 axis = strtol(value, &end, 0);
257 if (axis >= 0 && axis < numAxes && end && !*end) {
258 context->rotation.axisY = axis;
259 }
260 }
261 value = GBAInputGetCustomValue(config, SDL_BINDING_BUTTON, "gyroAxisX", name);
262 if (value) {
263 axis = strtol(value, &end, 0);
264 if (axis >= 0 && axis < numAxes && end && !*end) {
265 context->rotation.gyroX = axis;
266 }
267 }
268 value = GBAInputGetCustomValue(config, SDL_BINDING_BUTTON, "gyroAxisY", name);
269 if (value) {
270 axis = strtol(value, &end, 0);
271 if (axis >= 0 && axis < numAxes && end && !*end) {
272 context->rotation.gyroY = axis;
273 }
274 }
275 value = GBAInputGetCustomValue(config, SDL_BINDING_BUTTON, "gyroSensitivity", name);
276 if (value) {
277 float sensitivity = strtof_u(value, &end);
278 if (end && !*end) {
279 context->rotation.gyroSensitivity = sensitivity;
280 }
281 }
282 }
283}
284
285void GBASDLPlayerSaveConfig(const struct GBASDLPlayer* context, struct Configuration* config) {
286 if (context->joystick) {
287#if SDL_VERSION_ATLEAST(2, 0, 0)
288 const char* name = SDL_JoystickName(context->joystick);
289#else
290 const char* name = SDL_JoystickName(SDL_JoystickIndex(context->joystick));
291#endif
292 char value[12];
293 snprintf(value, sizeof(value), "%i", context->rotation.axisX);
294 GBAInputSetCustomValue(config, SDL_BINDING_BUTTON, "tiltAxisX", value, name);
295 snprintf(value, sizeof(value), "%i", context->rotation.axisY);
296 GBAInputSetCustomValue(config, SDL_BINDING_BUTTON, "tiltAxisY", value, name);
297 snprintf(value, sizeof(value), "%i", context->rotation.gyroX);
298 GBAInputSetCustomValue(config, SDL_BINDING_BUTTON, "gyroAxisX", value, name);
299 snprintf(value, sizeof(value), "%i", context->rotation.gyroY);
300 GBAInputSetCustomValue(config, SDL_BINDING_BUTTON, "gyroAxisY", value, name);
301 snprintf(value, sizeof(value), "%g", context->rotation.gyroSensitivity);
302 GBAInputSetCustomValue(config, SDL_BINDING_BUTTON, "gyroSensitivity", value, name);
303 }
304}
305
306void GBASDLPlayerChangeJoystick(struct GBASDLEvents* events, struct GBASDLPlayer* player, size_t index) {
307 if (player->playerId >= MAX_PLAYERS || index >= events->nJoysticks) {
308 return;
309 }
310 events->joysticksClaimed[player->playerId] = index;
311 player->joystickIndex = index;
312 player->joystick = events->joysticks[index];
313#if SDL_VERSION_ATLEAST(2, 0, 0)
314 player->haptic = events->haptic[index];
315#endif
316}
317
318static void _pauseAfterFrame(struct GBAThread* context) {
319 context->frameCallback = 0;
320 GBAThreadPauseFromThread(context);
321}
322
323static void _GBASDLHandleKeypress(struct GBAThread* context, struct GBASDLPlayer* sdlContext, const struct SDL_KeyboardEvent* event) {
324 enum GBAKey key = GBA_KEY_NONE;
325 if (!event->keysym.mod) {
326#if !defined(BUILD_PANDORA) && SDL_VERSION_ATLEAST(2, 0, 0)
327 key = GBAInputMapKey(sdlContext->bindings, SDL_BINDING_KEY, event->keysym.scancode);
328#else
329 key = GBAInputMapKey(sdlContext->bindings, SDL_BINDING_KEY, event->keysym.sym);
330#endif
331 }
332 if (key != GBA_KEY_NONE) {
333 if (event->type == SDL_KEYDOWN) {
334 context->activeKeys |= 1 << key;
335 } else {
336 context->activeKeys &= ~(1 << key);
337 }
338 return;
339 }
340 if (event->keysym.sym == SDLK_TAB) {
341 context->sync.audioWait = event->type != SDL_KEYDOWN;
342 return;
343 }
344 if (event->type == SDL_KEYDOWN) {
345 switch (event->keysym.sym) {
346 case SDLK_F11:
347 if (context->debugger) {
348 ARMDebuggerEnter(context->debugger, DEBUGGER_ENTER_MANUAL, 0);
349 }
350 return;
351#ifdef USE_PNG
352 case SDLK_F12:
353 GBAThreadInterrupt(context);
354 GBAThreadTakeScreenshot(context);
355 GBAThreadContinue(context);
356 return;
357#endif
358 case SDLK_BACKSLASH:
359 GBAThreadPause(context);
360 context->frameCallback = _pauseAfterFrame;
361 GBAThreadUnpause(context);
362 return;
363 case SDLK_BACKQUOTE:
364 GBAThreadInterrupt(context);
365 GBARewind(context, 10);
366 GBAThreadContinue(context);
367 return;
368#ifdef BUILD_PANDORA
369 case SDLK_ESCAPE:
370 GBAThreadEnd(context);
371 return;
372#endif
373 default:
374 if ((event->keysym.mod & GUI_MOD) && (event->keysym.mod & GUI_MOD) == event->keysym.mod) {
375 switch (event->keysym.sym) {
376#if SDL_VERSION_ATLEAST(2, 0, 0)
377 case SDLK_f:
378 SDL_SetWindowFullscreen(sdlContext->window, sdlContext->fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP);
379 sdlContext->fullscreen = !sdlContext->fullscreen;
380 sdlContext->windowUpdated = 1;
381 break;
382#endif
383 case SDLK_p:
384 GBAThreadTogglePause(context);
385 break;
386 case SDLK_n:
387 GBAThreadPause(context);
388 context->frameCallback = _pauseAfterFrame;
389 GBAThreadUnpause(context);
390 break;
391 case SDLK_r:
392 GBAThreadReset(context);
393 break;
394 default:
395 break;
396 }
397 }
398 if (event->keysym.mod & KMOD_SHIFT) {
399 switch (event->keysym.sym) {
400 case SDLK_F1:
401 case SDLK_F2:
402 case SDLK_F3:
403 case SDLK_F4:
404 case SDLK_F5:
405 case SDLK_F6:
406 case SDLK_F7:
407 case SDLK_F8:
408 case SDLK_F9:
409 GBAThreadInterrupt(context);
410 GBASaveState(context, context->stateDir, event->keysym.sym - SDLK_F1 + 1, true);
411 GBAThreadContinue(context);
412 break;
413 default:
414 break;
415 }
416 } else {
417 switch (event->keysym.sym) {
418 case SDLK_F1:
419 case SDLK_F2:
420 case SDLK_F3:
421 case SDLK_F4:
422 case SDLK_F5:
423 case SDLK_F6:
424 case SDLK_F7:
425 case SDLK_F8:
426 case SDLK_F9:
427 GBAThreadInterrupt(context);
428 GBALoadState(context, context->stateDir, event->keysym.sym - SDLK_F1 + 1);
429 GBAThreadContinue(context);
430 break;
431 default:
432 break;
433 }
434 }
435 return;
436 }
437 }
438}
439
440static void _GBASDLHandleJoyButton(struct GBAThread* context, struct GBASDLPlayer* sdlContext, const struct SDL_JoyButtonEvent* event) {
441 enum GBAKey key = 0;
442 key = GBAInputMapKey(sdlContext->bindings, SDL_BINDING_BUTTON, event->button);
443 if (key == GBA_KEY_NONE) {
444 return;
445 }
446
447 if (event->type == SDL_JOYBUTTONDOWN) {
448 context->activeKeys |= 1 << key;
449 } else {
450 context->activeKeys &= ~(1 << key);
451 }
452}
453
454static void _GBASDLHandleJoyHat(struct GBAThread* context, const struct SDL_JoyHatEvent* event) {
455 enum GBAKey key = 0;
456
457 if (event->value & SDL_HAT_UP) {
458 key |= 1 << GBA_KEY_UP;
459 }
460 if (event->value & SDL_HAT_LEFT) {
461 key |= 1 << GBA_KEY_LEFT;
462 }
463 if (event->value & SDL_HAT_DOWN) {
464 key |= 1 << GBA_KEY_DOWN;
465 }
466 if (event->value & SDL_HAT_RIGHT) {
467 key |= 1 << GBA_KEY_RIGHT;
468 }
469
470 context->activeKeys &= ~((1 << GBA_KEY_UP) | (1 << GBA_KEY_LEFT) | (1 << GBA_KEY_DOWN) | (1 << GBA_KEY_RIGHT));
471 context->activeKeys |= key;
472}
473
474static void _GBASDLHandleJoyAxis(struct GBAThread* context, struct GBASDLPlayer* sdlContext, const struct SDL_JoyAxisEvent* event) {
475 int keys = context->activeKeys;
476
477 keys = GBAInputClearAxis(sdlContext->bindings, SDL_BINDING_BUTTON, event->axis, keys);
478 enum GBAKey key = GBAInputMapAxis(sdlContext->bindings, SDL_BINDING_BUTTON, event->axis, event->value);
479 if (key != GBA_KEY_NONE) {
480 keys |= 1 << key;
481 }
482
483 context->activeKeys = keys;
484}
485
486#if SDL_VERSION_ATLEAST(2, 0, 0)
487static void _GBASDLHandleWindowEvent(struct GBAThread* context, struct GBASDLPlayer* sdlContext, const struct SDL_WindowEvent* event) {
488 UNUSED(context);
489 switch (event->event) {
490 case SDL_WINDOWEVENT_SIZE_CHANGED:
491 sdlContext->windowUpdated = 1;
492 break;
493 }
494}
495#endif
496
497void GBASDLHandleEvent(struct GBAThread* context, struct GBASDLPlayer* sdlContext, const union SDL_Event* event) {
498 switch (event->type) {
499 case SDL_QUIT:
500 GBAThreadEnd(context);
501 break;
502#if SDL_VERSION_ATLEAST(2, 0, 0)
503 case SDL_WINDOWEVENT:
504 _GBASDLHandleWindowEvent(context, sdlContext, &event->window);
505 break;
506#endif
507 case SDL_KEYDOWN:
508 case SDL_KEYUP:
509 _GBASDLHandleKeypress(context, sdlContext, &event->key);
510 break;
511 case SDL_JOYBUTTONDOWN:
512 case SDL_JOYBUTTONUP:
513 _GBASDLHandleJoyButton(context, sdlContext, &event->jbutton);
514 break;
515 case SDL_JOYHATMOTION:
516 _GBASDLHandleJoyHat(context, &event->jhat);
517 break;
518 case SDL_JOYAXISMOTION:
519 _GBASDLHandleJoyAxis(context, sdlContext, &event->jaxis);
520 break;
521 }
522}
523
524#if SDL_VERSION_ATLEAST(2, 0, 0)
525static void _GBASDLSetRumble(struct GBARumble* rumble, int enable) {
526 struct GBASDLRumble* sdlRumble = (struct GBASDLRumble*) rumble;
527 if (!sdlRumble->p->haptic || !SDL_HapticRumbleSupported(sdlRumble->p->haptic)) {
528 return;
529 }
530 if (enable) {
531 SDL_HapticRumblePlay(sdlRumble->p->haptic, 1.0f, 20);
532 } else {
533 SDL_HapticRumbleStop(sdlRumble->p->haptic);
534 }
535}
536#endif
537
538static int32_t _readTilt(struct GBASDLPlayer* player, int axis) {
539 return SDL_JoystickGetAxis(player->joystick, axis) * 0x3800;
540}
541
542static int32_t _GBASDLReadTiltX(struct GBARotationSource* source) {
543 struct GBASDLRotation* rotation = (struct GBASDLRotation*) source;
544 return _readTilt(rotation->p, rotation->axisX);
545}
546
547static int32_t _GBASDLReadTiltY(struct GBARotationSource* source) {
548 struct GBASDLRotation* rotation = (struct GBASDLRotation*) source;
549 return _readTilt(rotation->p, rotation->axisY);
550}
551
552static int32_t _GBASDLReadGyroZ(struct GBARotationSource* source) {
553 struct GBASDLRotation* rotation = (struct GBASDLRotation*) source;
554 float z = rotation->zDelta;
555 return z * rotation->gyroSensitivity;
556}
557
558static void _GBASDLRotationSample(struct GBARotationSource* source) {
559 struct GBASDLRotation* rotation = (struct GBASDLRotation*) source;
560 SDL_JoystickUpdate();
561
562 int x = SDL_JoystickGetAxis(rotation->p->joystick, rotation->gyroX);
563 int y = SDL_JoystickGetAxis(rotation->p->joystick, rotation->gyroY);
564 union {
565 float f;
566 int32_t i;
567 } theta = { .f = atan2f(y, x) - atan2f(rotation->oldY, rotation->oldX) };
568 if (isnan(theta.f)) {
569 theta.f = 0.0f;
570 } else if (theta.f > M_PI) {
571 theta.f -= 2.0f * M_PI;
572 } else if (theta.f < -M_PI) {
573 theta.f += 2.0f * M_PI;
574 }
575 rotation->oldX = x;
576 rotation->oldY = y;
577
578 float oldZ = 0;
579 if (CircleBufferSize(&rotation->zHistory) == GYRO_STEPS * sizeof(float)) {
580 CircleBufferRead32(&rotation->zHistory, (int32_t*) &oldZ);
581 }
582 CircleBufferWrite32(&rotation->zHistory, theta.i);
583 rotation->zDelta += theta.f - oldZ;
584}