1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21
22/**
23 * \file SDL_haptic.h
24 *
25 * \brief The SDL haptic subsystem allows you to control haptic (force feedback)
26 * devices.
27 *
28 * The basic usage is as follows:
29 * - Initialize the subsystem (::SDL_INIT_HAPTIC).
30 * - Open a haptic device.
31 * - SDL_HapticOpen() to open from index.
32 * - SDL_HapticOpenFromJoystick() to open from an existing joystick.
33 * - Create an effect (::SDL_HapticEffect).
34 * - Upload the effect with SDL_HapticNewEffect().
35 * - Run the effect with SDL_HapticRunEffect().
36 * - (optional) Free the effect with SDL_HapticDestroyEffect().
37 * - Close the haptic device with SDL_HapticClose().
38 *
39 * \par Simple rumble example:
40 * \code
41 * SDL_Haptic *haptic;
42 *
43 * // Open the device
44 * haptic = SDL_HapticOpen( 0 );
45 * if (haptic == NULL)
46 * return -1;
47 *
48 * // Initialize simple rumble
49 * if (SDL_HapticRumbleInit( haptic ) != 0)
50 * return -1;
51 *
52 * // Play effect at 50% strength for 2 seconds
53 * if (SDL_HapticRumblePlay( haptic, 0.5, 2000 ) != 0)
54 * return -1;
55 * SDL_Delay( 2000 );
56 *
57 * // Clean up
58 * SDL_HapticClose( haptic );
59 * \endcode
60 *
61 * \par Complete example:
62 * \code
63 * int test_haptic( SDL_Joystick * joystick ) {
64 * SDL_Haptic *haptic;
65 * SDL_HapticEffect effect;
66 * int effect_id;
67 *
68 * // Open the device
69 * haptic = SDL_HapticOpenFromJoystick( joystick );
70 * if (haptic == NULL) return -1; // Most likely joystick isn't haptic
71 *
72 * // See if it can do sine waves
73 * if ((SDL_HapticQuery(haptic) & SDL_HAPTIC_SINE)==0) {
74 * SDL_HapticClose(haptic); // No sine effect
75 * return -1;
76 * }
77 *
78 * // Create the effect
79 * memset( &effect, 0, sizeof(SDL_HapticEffect) ); // 0 is safe default
80 * effect.type = SDL_HAPTIC_SINE;
81 * effect.periodic.direction.type = SDL_HAPTIC_POLAR; // Polar coordinates
82 * effect.periodic.direction.dir[0] = 18000; // Force comes from south
83 * effect.periodic.period = 1000; // 1000 ms
84 * effect.periodic.magnitude = 20000; // 20000/32767 strength
85 * effect.periodic.length = 5000; // 5 seconds long
86 * effect.periodic.attack_length = 1000; // Takes 1 second to get max strength
87 * effect.periodic.fade_length = 1000; // Takes 1 second to fade away
88 *
89 * // Upload the effect
90 * effect_id = SDL_HapticNewEffect( haptic, &effect );
91 *
92 * // Test the effect
93 * SDL_HapticRunEffect( haptic, effect_id, 1 );
94 * SDL_Delay( 5000); // Wait for the effect to finish
95 *
96 * // We destroy the effect, although closing the device also does this
97 * SDL_HapticDestroyEffect( haptic, effect_id );
98 *
99 * // Close the device
100 * SDL_HapticClose(haptic);
101 *
102 * return 0; // Success
103 * }
104 * \endcode
105 */
106
107#ifndef SDL_haptic_h_
108#define SDL_haptic_h_
109
110#include "SDL_stdinc.h"
111#include "SDL_error.h"
112#include "SDL_joystick.h"
113
114#include "begin_code.h"
115/* Set up for C function definitions, even when using C++ */
116#ifdef __cplusplus
117extern "C" {
118#endif /* __cplusplus */
119
120/* FIXME: For SDL 2.1, adjust all the magnitude variables to be Uint16 (0xFFFF).
121 *
122 * At the moment the magnitude variables are mixed between signed/unsigned, and
123 * it is also not made clear that ALL of those variables expect a max of 0x7FFF.
124 *
125 * Some platforms may have higher precision than that (Linux FF, Windows XInput)
126 * so we should fix the inconsistency in favor of higher possible precision,
127 * adjusting for platforms that use different scales.
128 * -flibit
129 */
130
131/**
132 * \typedef SDL_Haptic
133 *
134 * \brief The haptic structure used to identify an SDL haptic.
135 *
136 * \sa SDL_HapticOpen
137 * \sa SDL_HapticOpenFromJoystick
138 * \sa SDL_HapticClose
139 */
140struct _SDL_Haptic;
141typedef struct _SDL_Haptic SDL_Haptic;
142
143
144/**
145 * \name Haptic features
146 *
147 * Different haptic features a device can have.
148 */
149/* @{ */
150
151/**
152 * \name Haptic effects
153 */
154/* @{ */
155
156/**
157 * \brief Constant effect supported.
158 *
159 * Constant haptic effect.
160 *
161 * \sa SDL_HapticCondition
162 */
163#define SDL_HAPTIC_CONSTANT (1u<<0)
164
165/**
166 * \brief Sine wave effect supported.
167 *
168 * Periodic haptic effect that simulates sine waves.
169 *
170 * \sa SDL_HapticPeriodic
171 */
172#define SDL_HAPTIC_SINE (1u<<1)
173
174/**
175 * \brief Left/Right effect supported.
176 *
177 * Haptic effect for direct control over high/low frequency motors.
178 *
179 * \sa SDL_HapticLeftRight
180 * \warning this value was SDL_HAPTIC_SQUARE right before 2.0.0 shipped. Sorry,
181 * we ran out of bits, and this is important for XInput devices.
182 */
183#define SDL_HAPTIC_LEFTRIGHT (1u<<2)
184
185/* !!! FIXME: put this back when we have more bits in 2.1 */
186/* #define SDL_HAPTIC_SQUARE (1<<2) */
187
188/**
189 * \brief Triangle wave effect supported.
190 *
191 * Periodic haptic effect that simulates triangular waves.
192 *
193 * \sa SDL_HapticPeriodic
194 */
195#define SDL_HAPTIC_TRIANGLE (1u<<3)
196
197/**
198 * \brief Sawtoothup wave effect supported.
199 *
200 * Periodic haptic effect that simulates saw tooth up waves.
201 *
202 * \sa SDL_HapticPeriodic
203 */
204#define SDL_HAPTIC_SAWTOOTHUP (1u<<4)
205
206/**
207 * \brief Sawtoothdown wave effect supported.
208 *
209 * Periodic haptic effect that simulates saw tooth down waves.
210 *
211 * \sa SDL_HapticPeriodic
212 */
213#define SDL_HAPTIC_SAWTOOTHDOWN (1u<<5)
214
215/**
216 * \brief Ramp effect supported.
217 *
218 * Ramp haptic effect.
219 *
220 * \sa SDL_HapticRamp
221 */
222#define SDL_HAPTIC_RAMP (1u<<6)
223
224/**
225 * \brief Spring effect supported - uses axes position.
226 *
227 * Condition haptic effect that simulates a spring. Effect is based on the
228 * axes position.
229 *
230 * \sa SDL_HapticCondition
231 */
232#define SDL_HAPTIC_SPRING (1u<<7)
233
234/**
235 * \brief Damper effect supported - uses axes velocity.
236 *
237 * Condition haptic effect that simulates dampening. Effect is based on the
238 * axes velocity.
239 *
240 * \sa SDL_HapticCondition
241 */
242#define SDL_HAPTIC_DAMPER (1u<<8)
243
244/**
245 * \brief Inertia effect supported - uses axes acceleration.
246 *
247 * Condition haptic effect that simulates inertia. Effect is based on the axes
248 * acceleration.
249 *
250 * \sa SDL_HapticCondition
251 */
252#define SDL_HAPTIC_INERTIA (1u<<9)
253
254/**
255 * \brief Friction effect supported - uses axes movement.
256 *
257 * Condition haptic effect that simulates friction. Effect is based on the
258 * axes movement.
259 *
260 * \sa SDL_HapticCondition
261 */
262#define SDL_HAPTIC_FRICTION (1u<<10)
263
264/**
265 * \brief Custom effect is supported.
266 *
267 * User defined custom haptic effect.
268 */
269#define SDL_HAPTIC_CUSTOM (1u<<11)
270
271/* @} *//* Haptic effects */
272
273/* These last few are features the device has, not effects */
274
275/**
276 * \brief Device can set global gain.
277 *
278 * Device supports setting the global gain.
279 *
280 * \sa SDL_HapticSetGain
281 */
282#define SDL_HAPTIC_GAIN (1u<<12)
283
284/**
285 * \brief Device can set autocenter.
286 *
287 * Device supports setting autocenter.
288 *
289 * \sa SDL_HapticSetAutocenter
290 */
291#define SDL_HAPTIC_AUTOCENTER (1u<<13)
292
293/**
294 * \brief Device can be queried for effect status.
295 *
296 * Device supports querying effect status.
297 *
298 * \sa SDL_HapticGetEffectStatus
299 */
300#define SDL_HAPTIC_STATUS (1u<<14)
301
302/**
303 * \brief Device can be paused.
304 *
305 * Devices supports being paused.
306 *
307 * \sa SDL_HapticPause
308 * \sa SDL_HapticUnpause
309 */
310#define SDL_HAPTIC_PAUSE (1u<<15)
311
312
313/**
314 * \name Direction encodings
315 */
316/* @{ */
317
318/**
319 * \brief Uses polar coordinates for the direction.
320 *
321 * \sa SDL_HapticDirection
322 */
323#define SDL_HAPTIC_POLAR 0
324
325/**
326 * \brief Uses cartesian coordinates for the direction.
327 *
328 * \sa SDL_HapticDirection
329 */
330#define SDL_HAPTIC_CARTESIAN 1
331
332/**
333 * \brief Uses spherical coordinates for the direction.
334 *
335 * \sa SDL_HapticDirection
336 */
337#define SDL_HAPTIC_SPHERICAL 2
338
339/* @} *//* Direction encodings */
340
341/* @} *//* Haptic features */
342
343/*
344 * Misc defines.
345 */
346
347/**
348 * \brief Used to play a device an infinite number of times.
349 *
350 * \sa SDL_HapticRunEffect
351 */
352#define SDL_HAPTIC_INFINITY 4294967295U
353
354
355/**
356 * \brief Structure that represents a haptic direction.
357 *
358 * This is the direction where the force comes from,
359 * instead of the direction in which the force is exerted.
360 *
361 * Directions can be specified by:
362 * - ::SDL_HAPTIC_POLAR : Specified by polar coordinates.
363 * - ::SDL_HAPTIC_CARTESIAN : Specified by cartesian coordinates.
364 * - ::SDL_HAPTIC_SPHERICAL : Specified by spherical coordinates.
365 *
366 * Cardinal directions of the haptic device are relative to the positioning
367 * of the device. North is considered to be away from the user.
368 *
369 * The following diagram represents the cardinal directions:
370 * \verbatim
371 .--.
372 |__| .-------.
373 |=.| |.-----.|
374 |--| || ||
375 | | |'-----'|
376 |__|~')_____('
377 [ COMPUTER ]
378
379
380 North (0,-1)
381 ^
382 |
383 |
384 (-1,0) West <----[ HAPTIC ]----> East (1,0)
385 |
386 |
387 v
388 South (0,1)
389
390
391 [ USER ]
392 \|||/
393 (o o)
394 ---ooO-(_)-Ooo---
395 \endverbatim
396 *
397 * If type is ::SDL_HAPTIC_POLAR, direction is encoded by hundredths of a
398 * degree starting north and turning clockwise. ::SDL_HAPTIC_POLAR only uses
399 * the first \c dir parameter. The cardinal directions would be:
400 * - North: 0 (0 degrees)
401 * - East: 9000 (90 degrees)
402 * - South: 18000 (180 degrees)
403 * - West: 27000 (270 degrees)
404 *
405 * If type is ::SDL_HAPTIC_CARTESIAN, direction is encoded by three positions
406 * (X axis, Y axis and Z axis (with 3 axes)). ::SDL_HAPTIC_CARTESIAN uses
407 * the first three \c dir parameters. The cardinal directions would be:
408 * - North: 0,-1, 0
409 * - East: 1, 0, 0
410 * - South: 0, 1, 0
411 * - West: -1, 0, 0
412 *
413 * The Z axis represents the height of the effect if supported, otherwise
414 * it's unused. In cartesian encoding (1, 2) would be the same as (2, 4), you
415 * can use any multiple you want, only the direction matters.
416 *
417 * If type is ::SDL_HAPTIC_SPHERICAL, direction is encoded by two rotations.
418 * The first two \c dir parameters are used. The \c dir parameters are as
419 * follows (all values are in hundredths of degrees):
420 * - Degrees from (1, 0) rotated towards (0, 1).
421 * - Degrees towards (0, 0, 1) (device needs at least 3 axes).
422 *
423 *
424 * Example of force coming from the south with all encodings (force coming
425 * from the south means the user will have to pull the stick to counteract):
426 * \code
427 * SDL_HapticDirection direction;
428 *
429 * // Cartesian directions
430 * direction.type = SDL_HAPTIC_CARTESIAN; // Using cartesian direction encoding.
431 * direction.dir[0] = 0; // X position
432 * direction.dir[1] = 1; // Y position
433 * // Assuming the device has 2 axes, we don't need to specify third parameter.
434 *
435 * // Polar directions
436 * direction.type = SDL_HAPTIC_POLAR; // We'll be using polar direction encoding.
437 * direction.dir[0] = 18000; // Polar only uses first parameter
438 *
439 * // Spherical coordinates
440 * direction.type = SDL_HAPTIC_SPHERICAL; // Spherical encoding
441 * direction.dir[0] = 9000; // Since we only have two axes we don't need more parameters.
442 * \endcode
443 *
444 * \sa SDL_HAPTIC_POLAR
445 * \sa SDL_HAPTIC_CARTESIAN
446 * \sa SDL_HAPTIC_SPHERICAL
447 * \sa SDL_HapticEffect
448 * \sa SDL_HapticNumAxes
449 */
450typedef struct SDL_HapticDirection
451{
452 Uint8 type; /**< The type of encoding. */
453 Sint32 dir[3]; /**< The encoded direction. */
454} SDL_HapticDirection;
455
456
457/**
458 * \brief A structure containing a template for a Constant effect.
459 *
460 * This struct is exclusively for the ::SDL_HAPTIC_CONSTANT effect.
461 *
462 * A constant effect applies a constant force in the specified direction
463 * to the joystick.
464 *
465 * \sa SDL_HAPTIC_CONSTANT
466 * \sa SDL_HapticEffect
467 */
468typedef struct SDL_HapticConstant
469{
470 /* Header */
471 Uint16 type; /**< ::SDL_HAPTIC_CONSTANT */
472 SDL_HapticDirection direction; /**< Direction of the effect. */
473
474 /* Replay */
475 Uint32 length; /**< Duration of the effect. */
476 Uint16 delay; /**< Delay before starting the effect. */
477
478 /* Trigger */
479 Uint16 button; /**< Button that triggers the effect. */
480 Uint16 interval; /**< How soon it can be triggered again after button. */
481
482 /* Constant */
483 Sint16 level; /**< Strength of the constant effect. */
484
485 /* Envelope */
486 Uint16 attack_length; /**< Duration of the attack. */
487 Uint16 attack_level; /**< Level at the start of the attack. */
488 Uint16 fade_length; /**< Duration of the fade. */
489 Uint16 fade_level; /**< Level at the end of the fade. */
490} SDL_HapticConstant;
491
492/**
493 * \brief A structure containing a template for a Periodic effect.
494 *
495 * The struct handles the following effects:
496 * - ::SDL_HAPTIC_SINE
497 * - ::SDL_HAPTIC_LEFTRIGHT
498 * - ::SDL_HAPTIC_TRIANGLE
499 * - ::SDL_HAPTIC_SAWTOOTHUP
500 * - ::SDL_HAPTIC_SAWTOOTHDOWN
501 *
502 * A periodic effect consists in a wave-shaped effect that repeats itself
503 * over time. The type determines the shape of the wave and the parameters
504 * determine the dimensions of the wave.
505 *
506 * Phase is given by hundredth of a degree meaning that giving the phase a value
507 * of 9000 will displace it 25% of its period. Here are sample values:
508 * - 0: No phase displacement.
509 * - 9000: Displaced 25% of its period.
510 * - 18000: Displaced 50% of its period.
511 * - 27000: Displaced 75% of its period.
512 * - 36000: Displaced 100% of its period, same as 0, but 0 is preferred.
513 *
514 * Examples:
515 * \verbatim
516 SDL_HAPTIC_SINE
517 __ __ __ __
518 / \ / \ / \ /
519 / \__/ \__/ \__/
520
521 SDL_HAPTIC_SQUARE
522 __ __ __ __ __
523 | | | | | | | | | |
524 | |__| |__| |__| |__| |
525
526 SDL_HAPTIC_TRIANGLE
527 /\ /\ /\ /\ /\
528 / \ / \ / \ / \ /
529 / \/ \/ \/ \/
530
531 SDL_HAPTIC_SAWTOOTHUP
532 /| /| /| /| /| /| /|
533 / | / | / | / | / | / | / |
534 / |/ |/ |/ |/ |/ |/ |
535
536 SDL_HAPTIC_SAWTOOTHDOWN
537 \ |\ |\ |\ |\ |\ |\ |
538 \ | \ | \ | \ | \ | \ | \ |
539 \| \| \| \| \| \| \|
540 \endverbatim
541 *
542 * \sa SDL_HAPTIC_SINE
543 * \sa SDL_HAPTIC_LEFTRIGHT
544 * \sa SDL_HAPTIC_TRIANGLE
545 * \sa SDL_HAPTIC_SAWTOOTHUP
546 * \sa SDL_HAPTIC_SAWTOOTHDOWN
547 * \sa SDL_HapticEffect
548 */
549typedef struct SDL_HapticPeriodic
550{
551 /* Header */
552 Uint16 type; /**< ::SDL_HAPTIC_SINE, ::SDL_HAPTIC_LEFTRIGHT,
553 ::SDL_HAPTIC_TRIANGLE, ::SDL_HAPTIC_SAWTOOTHUP or
554 ::SDL_HAPTIC_SAWTOOTHDOWN */
555 SDL_HapticDirection direction; /**< Direction of the effect. */
556
557 /* Replay */
558 Uint32 length; /**< Duration of the effect. */
559 Uint16 delay; /**< Delay before starting the effect. */
560
561 /* Trigger */
562 Uint16 button; /**< Button that triggers the effect. */
563 Uint16 interval; /**< How soon it can be triggered again after button. */
564
565 /* Periodic */
566 Uint16 period; /**< Period of the wave. */
567 Sint16 magnitude; /**< Peak value; if negative, equivalent to 180 degrees extra phase shift. */
568 Sint16 offset; /**< Mean value of the wave. */
569 Uint16 phase; /**< Positive phase shift given by hundredth of a degree. */
570
571 /* Envelope */
572 Uint16 attack_length; /**< Duration of the attack. */
573 Uint16 attack_level; /**< Level at the start of the attack. */
574 Uint16 fade_length; /**< Duration of the fade. */
575 Uint16 fade_level; /**< Level at the end of the fade. */
576} SDL_HapticPeriodic;
577
578/**
579 * \brief A structure containing a template for a Condition effect.
580 *
581 * The struct handles the following effects:
582 * - ::SDL_HAPTIC_SPRING: Effect based on axes position.
583 * - ::SDL_HAPTIC_DAMPER: Effect based on axes velocity.
584 * - ::SDL_HAPTIC_INERTIA: Effect based on axes acceleration.
585 * - ::SDL_HAPTIC_FRICTION: Effect based on axes movement.
586 *
587 * Direction is handled by condition internals instead of a direction member.
588 * The condition effect specific members have three parameters. The first
589 * refers to the X axis, the second refers to the Y axis and the third
590 * refers to the Z axis. The right terms refer to the positive side of the
591 * axis and the left terms refer to the negative side of the axis. Please
592 * refer to the ::SDL_HapticDirection diagram for which side is positive and
593 * which is negative.
594 *
595 * \sa SDL_HapticDirection
596 * \sa SDL_HAPTIC_SPRING
597 * \sa SDL_HAPTIC_DAMPER
598 * \sa SDL_HAPTIC_INERTIA
599 * \sa SDL_HAPTIC_FRICTION
600 * \sa SDL_HapticEffect
601 */
602typedef struct SDL_HapticCondition
603{
604 /* Header */
605 Uint16 type; /**< ::SDL_HAPTIC_SPRING, ::SDL_HAPTIC_DAMPER,
606 ::SDL_HAPTIC_INERTIA or ::SDL_HAPTIC_FRICTION */
607 SDL_HapticDirection direction; /**< Direction of the effect - Not used ATM. */
608
609 /* Replay */
610 Uint32 length; /**< Duration of the effect. */
611 Uint16 delay; /**< Delay before starting the effect. */
612
613 /* Trigger */
614 Uint16 button; /**< Button that triggers the effect. */
615 Uint16 interval; /**< How soon it can be triggered again after button. */
616
617 /* Condition */
618 Uint16 right_sat[3]; /**< Level when joystick is to the positive side; max 0xFFFF. */
619 Uint16 left_sat[3]; /**< Level when joystick is to the negative side; max 0xFFFF. */
620 Sint16 right_coeff[3]; /**< How fast to increase the force towards the positive side. */
621 Sint16 left_coeff[3]; /**< How fast to increase the force towards the negative side. */
622 Uint16 deadband[3]; /**< Size of the dead zone; max 0xFFFF: whole axis-range when 0-centered. */
623 Sint16 center[3]; /**< Position of the dead zone. */
624} SDL_HapticCondition;
625
626/**
627 * \brief A structure containing a template for a Ramp effect.
628 *
629 * This struct is exclusively for the ::SDL_HAPTIC_RAMP effect.
630 *
631 * The ramp effect starts at start strength and ends at end strength.
632 * It augments in linear fashion. If you use attack and fade with a ramp
633 * the effects get added to the ramp effect making the effect become
634 * quadratic instead of linear.
635 *
636 * \sa SDL_HAPTIC_RAMP
637 * \sa SDL_HapticEffect
638 */
639typedef struct SDL_HapticRamp
640{
641 /* Header */
642 Uint16 type; /**< ::SDL_HAPTIC_RAMP */
643 SDL_HapticDirection direction; /**< Direction of the effect. */
644
645 /* Replay */
646 Uint32 length; /**< Duration of the effect. */
647 Uint16 delay; /**< Delay before starting the effect. */
648
649 /* Trigger */
650 Uint16 button; /**< Button that triggers the effect. */
651 Uint16 interval; /**< How soon it can be triggered again after button. */
652
653 /* Ramp */
654 Sint16 start; /**< Beginning strength level. */
655 Sint16 end; /**< Ending strength level. */
656
657 /* Envelope */
658 Uint16 attack_length; /**< Duration of the attack. */
659 Uint16 attack_level; /**< Level at the start of the attack. */
660 Uint16 fade_length; /**< Duration of the fade. */
661 Uint16 fade_level; /**< Level at the end of the fade. */
662} SDL_HapticRamp;
663
664/**
665 * \brief A structure containing a template for a Left/Right effect.
666 *
667 * This struct is exclusively for the ::SDL_HAPTIC_LEFTRIGHT effect.
668 *
669 * The Left/Right effect is used to explicitly control the large and small
670 * motors, commonly found in modern game controllers. The small (right) motor
671 * is high frequency, and the large (left) motor is low frequency.
672 *
673 * \sa SDL_HAPTIC_LEFTRIGHT
674 * \sa SDL_HapticEffect
675 */
676typedef struct SDL_HapticLeftRight
677{
678 /* Header */
679 Uint16 type; /**< ::SDL_HAPTIC_LEFTRIGHT */
680
681 /* Replay */
682 Uint32 length; /**< Duration of the effect in milliseconds. */
683
684 /* Rumble */
685 Uint16 large_magnitude; /**< Control of the large controller motor. */
686 Uint16 small_magnitude; /**< Control of the small controller motor. */
687} SDL_HapticLeftRight;
688
689/**
690 * \brief A structure containing a template for the ::SDL_HAPTIC_CUSTOM effect.
691 *
692 * This struct is exclusively for the ::SDL_HAPTIC_CUSTOM effect.
693 *
694 * A custom force feedback effect is much like a periodic effect, where the
695 * application can define its exact shape. You will have to allocate the
696 * data yourself. Data should consist of channels * samples Uint16 samples.
697 *
698 * If channels is one, the effect is rotated using the defined direction.
699 * Otherwise it uses the samples in data for the different axes.
700 *
701 * \sa SDL_HAPTIC_CUSTOM
702 * \sa SDL_HapticEffect
703 */
704typedef struct SDL_HapticCustom
705{
706 /* Header */
707 Uint16 type; /**< ::SDL_HAPTIC_CUSTOM */
708 SDL_HapticDirection direction; /**< Direction of the effect. */
709
710 /* Replay */
711 Uint32 length; /**< Duration of the effect. */
712 Uint16 delay; /**< Delay before starting the effect. */
713
714 /* Trigger */
715 Uint16 button; /**< Button that triggers the effect. */
716 Uint16 interval; /**< How soon it can be triggered again after button. */
717
718 /* Custom */
719 Uint8 channels; /**< Axes to use, minimum of one. */
720 Uint16 period; /**< Sample periods. */
721 Uint16 samples; /**< Amount of samples. */
722 Uint16 *data; /**< Should contain channels*samples items. */
723
724 /* Envelope */
725 Uint16 attack_length; /**< Duration of the attack. */
726 Uint16 attack_level; /**< Level at the start of the attack. */
727 Uint16 fade_length; /**< Duration of the fade. */
728 Uint16 fade_level; /**< Level at the end of the fade. */
729} SDL_HapticCustom;
730
731/**
732 * \brief The generic template for any haptic effect.
733 *
734 * All values max at 32767 (0x7FFF). Signed values also can be negative.
735 * Time values unless specified otherwise are in milliseconds.
736 *
737 * You can also pass ::SDL_HAPTIC_INFINITY to length instead of a 0-32767
738 * value. Neither delay, interval, attack_length nor fade_length support
739 * ::SDL_HAPTIC_INFINITY. Fade will also not be used since effect never ends.
740 *
741 * Additionally, the ::SDL_HAPTIC_RAMP effect does not support a duration of
742 * ::SDL_HAPTIC_INFINITY.
743 *
744 * Button triggers may not be supported on all devices, it is advised to not
745 * use them if possible. Buttons start at index 1 instead of index 0 like
746 * the joystick.
747 *
748 * If both attack_length and fade_level are 0, the envelope is not used,
749 * otherwise both values are used.
750 *
751 * Common parts:
752 * \code
753 * // Replay - All effects have this
754 * Uint32 length; // Duration of effect (ms).
755 * Uint16 delay; // Delay before starting effect.
756 *
757 * // Trigger - All effects have this
758 * Uint16 button; // Button that triggers effect.
759 * Uint16 interval; // How soon before effect can be triggered again.
760 *
761 * // Envelope - All effects except condition effects have this
762 * Uint16 attack_length; // Duration of the attack (ms).
763 * Uint16 attack_level; // Level at the start of the attack.
764 * Uint16 fade_length; // Duration of the fade out (ms).
765 * Uint16 fade_level; // Level at the end of the fade.
766 * \endcode
767 *
768 *
769 * Here we have an example of a constant effect evolution in time:
770 * \verbatim
771 Strength
772 ^
773 |
774 | effect level --> _________________
775 | / \
776 | / \
777 | / \
778 | / \
779 | attack_level --> | \
780 | | | <--- fade_level
781 |
782 +--------------------------------------------------> Time
783 [--] [---]
784 attack_length fade_length
785
786 [------------------][-----------------------]
787 delay length
788 \endverbatim
789 *
790 * Note either the attack_level or the fade_level may be above the actual
791 * effect level.
792 *
793 * \sa SDL_HapticConstant
794 * \sa SDL_HapticPeriodic
795 * \sa SDL_HapticCondition
796 * \sa SDL_HapticRamp
797 * \sa SDL_HapticLeftRight
798 * \sa SDL_HapticCustom
799 */
800typedef union SDL_HapticEffect
801{
802 /* Common for all force feedback effects */
803 Uint16 type; /**< Effect type. */
804 SDL_HapticConstant constant; /**< Constant effect. */
805 SDL_HapticPeriodic periodic; /**< Periodic effect. */
806 SDL_HapticCondition condition; /**< Condition effect. */
807 SDL_HapticRamp ramp; /**< Ramp effect. */
808 SDL_HapticLeftRight leftright; /**< Left/Right effect. */
809 SDL_HapticCustom custom; /**< Custom effect. */
810} SDL_HapticEffect;
811
812
813/* Function prototypes */
814/**
815 * \brief Count the number of haptic devices attached to the system.
816 *
817 * \return Number of haptic devices detected on the system.
818 */
819extern DECLSPEC int SDLCALL SDL_NumHaptics(void);
820
821/**
822 * \brief Get the implementation dependent name of a haptic device.
823 *
824 * This can be called before any joysticks are opened.
825 * If no name can be found, this function returns NULL.
826 *
827 * \param device_index Index of the device to get its name.
828 * \return Name of the device or NULL on error.
829 *
830 * \sa SDL_NumHaptics
831 */
832extern DECLSPEC const char *SDLCALL SDL_HapticName(int device_index);
833
834/**
835 * \brief Opens a haptic device for use.
836 *
837 * The index passed as an argument refers to the N'th haptic device on this
838 * system.
839 *
840 * When opening a haptic device, its gain will be set to maximum and
841 * autocenter will be disabled. To modify these values use
842 * SDL_HapticSetGain() and SDL_HapticSetAutocenter().
843 *
844 * \param device_index Index of the device to open.
845 * \return Device identifier or NULL on error.
846 *
847 * \sa SDL_HapticIndex
848 * \sa SDL_HapticOpenFromMouse
849 * \sa SDL_HapticOpenFromJoystick
850 * \sa SDL_HapticClose
851 * \sa SDL_HapticSetGain
852 * \sa SDL_HapticSetAutocenter
853 * \sa SDL_HapticPause
854 * \sa SDL_HapticStopAll
855 */
856extern DECLSPEC SDL_Haptic *SDLCALL SDL_HapticOpen(int device_index);
857
858/**
859 * \brief Checks if the haptic device at index has been opened.
860 *
861 * \param device_index Index to check to see if it has been opened.
862 * \return 1 if it has been opened or 0 if it hasn't.
863 *
864 * \sa SDL_HapticOpen
865 * \sa SDL_HapticIndex
866 */
867extern DECLSPEC int SDLCALL SDL_HapticOpened(int device_index);
868
869/**
870 * \brief Gets the index of a haptic device.
871 *
872 * \param haptic Haptic device to get the index of.
873 * \return The index of the haptic device or -1 on error.
874 *
875 * \sa SDL_HapticOpen
876 * \sa SDL_HapticOpened
877 */
878extern DECLSPEC int SDLCALL SDL_HapticIndex(SDL_Haptic * haptic);
879
880/**
881 * \brief Gets whether or not the current mouse has haptic capabilities.
882 *
883 * \return SDL_TRUE if the mouse is haptic, SDL_FALSE if it isn't.
884 *
885 * \sa SDL_HapticOpenFromMouse
886 */
887extern DECLSPEC int SDLCALL SDL_MouseIsHaptic(void);
888
889/**
890 * \brief Tries to open a haptic device from the current mouse.
891 *
892 * \return The haptic device identifier or NULL on error.
893 *
894 * \sa SDL_MouseIsHaptic
895 * \sa SDL_HapticOpen
896 */
897extern DECLSPEC SDL_Haptic *SDLCALL SDL_HapticOpenFromMouse(void);
898
899/**
900 * \brief Checks to see if a joystick has haptic features.
901 *
902 * \param joystick Joystick to test for haptic capabilities.
903 * \return SDL_TRUE if the joystick is haptic, SDL_FALSE if it isn't
904 * or -1 if an error occurred.
905 *
906 * \sa SDL_HapticOpenFromJoystick
907 */
908extern DECLSPEC int SDLCALL SDL_JoystickIsHaptic(SDL_Joystick * joystick);
909
910/**
911 * \brief Opens a haptic device for use from a joystick device.
912 *
913 * You must still close the haptic device separately. It will not be closed
914 * with the joystick.
915 *
916 * When opening from a joystick you should first close the haptic device before
917 * closing the joystick device. If not, on some implementations the haptic
918 * device will also get unallocated and you'll be unable to use force feedback
919 * on that device.
920 *
921 * \param joystick Joystick to create a haptic device from.
922 * \return A valid haptic device identifier on success or NULL on error.
923 *
924 * \sa SDL_HapticOpen
925 * \sa SDL_HapticClose
926 */
927extern DECLSPEC SDL_Haptic *SDLCALL SDL_HapticOpenFromJoystick(SDL_Joystick *
928 joystick);
929
930/**
931 * \brief Closes a haptic device previously opened with SDL_HapticOpen().
932 *
933 * \param haptic Haptic device to close.
934 */
935extern DECLSPEC void SDLCALL SDL_HapticClose(SDL_Haptic * haptic);
936
937/**
938 * \brief Returns the number of effects a haptic device can store.
939 *
940 * On some platforms this isn't fully supported, and therefore is an
941 * approximation. Always check to see if your created effect was actually
942 * created and do not rely solely on SDL_HapticNumEffects().
943 *
944 * \param haptic The haptic device to query effect max.
945 * \return The number of effects the haptic device can store or
946 * -1 on error.
947 *
948 * \sa SDL_HapticNumEffectsPlaying
949 * \sa SDL_HapticQuery
950 */
951extern DECLSPEC int SDLCALL SDL_HapticNumEffects(SDL_Haptic * haptic);
952
953/**
954 * \brief Returns the number of effects a haptic device can play at the same
955 * time.
956 *
957 * This is not supported on all platforms, but will always return a value.
958 * Added here for the sake of completeness.
959 *
960 * \param haptic The haptic device to query maximum playing effects.
961 * \return The number of effects the haptic device can play at the same time
962 * or -1 on error.
963 *
964 * \sa SDL_HapticNumEffects
965 * \sa SDL_HapticQuery
966 */
967extern DECLSPEC int SDLCALL SDL_HapticNumEffectsPlaying(SDL_Haptic * haptic);
968
969/**
970 * \brief Gets the haptic device's supported features in bitwise manner.
971 *
972 * Example:
973 * \code
974 * if (SDL_HapticQuery(haptic) & SDL_HAPTIC_CONSTANT) {
975 * printf("We have constant haptic effect!\n");
976 * }
977 * \endcode
978 *
979 * \param haptic The haptic device to query.
980 * \return Haptic features in bitwise manner (OR'd).
981 *
982 * \sa SDL_HapticNumEffects
983 * \sa SDL_HapticEffectSupported
984 */
985extern DECLSPEC unsigned int SDLCALL SDL_HapticQuery(SDL_Haptic * haptic);
986
987
988/**
989 * \brief Gets the number of haptic axes the device has.
990 *
991 * \sa SDL_HapticDirection
992 */
993extern DECLSPEC int SDLCALL SDL_HapticNumAxes(SDL_Haptic * haptic);
994
995/**
996 * \brief Checks to see if effect is supported by haptic.
997 *
998 * \param haptic Haptic device to check on.
999 * \param effect Effect to check to see if it is supported.
1000 * \return SDL_TRUE if effect is supported, SDL_FALSE if it isn't or -1 on error.
1001 *
1002 * \sa SDL_HapticQuery
1003 * \sa SDL_HapticNewEffect
1004 */
1005extern DECLSPEC int SDLCALL SDL_HapticEffectSupported(SDL_Haptic * haptic,
1006 SDL_HapticEffect *
1007 effect);
1008
1009/**
1010 * \brief Creates a new haptic effect on the device.
1011 *
1012 * \param haptic Haptic device to create the effect on.
1013 * \param effect Properties of the effect to create.
1014 * \return The identifier of the effect on success or -1 on error.
1015 *
1016 * \sa SDL_HapticUpdateEffect
1017 * \sa SDL_HapticRunEffect
1018 * \sa SDL_HapticDestroyEffect
1019 */
1020extern DECLSPEC int SDLCALL SDL_HapticNewEffect(SDL_Haptic * haptic,
1021 SDL_HapticEffect * effect);
1022
1023/**
1024 * \brief Updates the properties of an effect.
1025 *
1026 * Can be used dynamically, although behavior when dynamically changing
1027 * direction may be strange. Specifically the effect may reupload itself
1028 * and start playing from the start. You cannot change the type either when
1029 * running SDL_HapticUpdateEffect().
1030 *
1031 * \param haptic Haptic device that has the effect.
1032 * \param effect Identifier of the effect to update.
1033 * \param data New effect properties to use.
1034 * \return 0 on success or -1 on error.
1035 *
1036 * \sa SDL_HapticNewEffect
1037 * \sa SDL_HapticRunEffect
1038 * \sa SDL_HapticDestroyEffect
1039 */
1040extern DECLSPEC int SDLCALL SDL_HapticUpdateEffect(SDL_Haptic * haptic,
1041 int effect,
1042 SDL_HapticEffect * data);
1043
1044/**
1045 * \brief Runs the haptic effect on its associated haptic device.
1046 *
1047 * If iterations are ::SDL_HAPTIC_INFINITY, it'll run the effect over and over
1048 * repeating the envelope (attack and fade) every time. If you only want the
1049 * effect to last forever, set ::SDL_HAPTIC_INFINITY in the effect's length
1050 * parameter.
1051 *
1052 * \param haptic Haptic device to run the effect on.
1053 * \param effect Identifier of the haptic effect to run.
1054 * \param iterations Number of iterations to run the effect. Use
1055 * ::SDL_HAPTIC_INFINITY for infinity.
1056 * \return 0 on success or -1 on error.
1057 *
1058 * \sa SDL_HapticStopEffect
1059 * \sa SDL_HapticDestroyEffect
1060 * \sa SDL_HapticGetEffectStatus
1061 */
1062extern DECLSPEC int SDLCALL SDL_HapticRunEffect(SDL_Haptic * haptic,
1063 int effect,
1064 Uint32 iterations);
1065
1066/**
1067 * \brief Stops the haptic effect on its associated haptic device.
1068 *
1069 * \param haptic Haptic device to stop the effect on.
1070 * \param effect Identifier of the effect to stop.
1071 * \return 0 on success or -1 on error.
1072 *
1073 * \sa SDL_HapticRunEffect
1074 * \sa SDL_HapticDestroyEffect
1075 */
1076extern DECLSPEC int SDLCALL SDL_HapticStopEffect(SDL_Haptic * haptic,
1077 int effect);
1078
1079/**
1080 * \brief Destroys a haptic effect on the device.
1081 *
1082 * This will stop the effect if it's running. Effects are automatically
1083 * destroyed when the device is closed.
1084 *
1085 * \param haptic Device to destroy the effect on.
1086 * \param effect Identifier of the effect to destroy.
1087 *
1088 * \sa SDL_HapticNewEffect
1089 */
1090extern DECLSPEC void SDLCALL SDL_HapticDestroyEffect(SDL_Haptic * haptic,
1091 int effect);
1092
1093/**
1094 * \brief Gets the status of the current effect on the haptic device.
1095 *
1096 * Device must support the ::SDL_HAPTIC_STATUS feature.
1097 *
1098 * \param haptic Haptic device to query the effect status on.
1099 * \param effect Identifier of the effect to query its status.
1100 * \return 0 if it isn't playing, 1 if it is playing or -1 on error.
1101 *
1102 * \sa SDL_HapticRunEffect
1103 * \sa SDL_HapticStopEffect
1104 */
1105extern DECLSPEC int SDLCALL SDL_HapticGetEffectStatus(SDL_Haptic * haptic,
1106 int effect);
1107
1108/**
1109 * \brief Sets the global gain of the device.
1110 *
1111 * Device must support the ::SDL_HAPTIC_GAIN feature.
1112 *
1113 * The user may specify the maximum gain by setting the environment variable
1114 * SDL_HAPTIC_GAIN_MAX which should be between 0 and 100. All calls to
1115 * SDL_HapticSetGain() will scale linearly using SDL_HAPTIC_GAIN_MAX as the
1116 * maximum.
1117 *
1118 * \param haptic Haptic device to set the gain on.
1119 * \param gain Value to set the gain to, should be between 0 and 100.
1120 * \return 0 on success or -1 on error.
1121 *
1122 * \sa SDL_HapticQuery
1123 */
1124extern DECLSPEC int SDLCALL SDL_HapticSetGain(SDL_Haptic * haptic, int gain);
1125
1126/**
1127 * \brief Sets the global autocenter of the device.
1128 *
1129 * Autocenter should be between 0 and 100. Setting it to 0 will disable
1130 * autocentering.
1131 *
1132 * Device must support the ::SDL_HAPTIC_AUTOCENTER feature.
1133 *
1134 * \param haptic Haptic device to set autocentering on.
1135 * \param autocenter Value to set autocenter to, 0 disables autocentering.
1136 * \return 0 on success or -1 on error.
1137 *
1138 * \sa SDL_HapticQuery
1139 */
1140extern DECLSPEC int SDLCALL SDL_HapticSetAutocenter(SDL_Haptic * haptic,
1141 int autocenter);
1142
1143/**
1144 * \brief Pauses a haptic device.
1145 *
1146 * Device must support the ::SDL_HAPTIC_PAUSE feature. Call
1147 * SDL_HapticUnpause() to resume playback.
1148 *
1149 * Do not modify the effects nor add new ones while the device is paused.
1150 * That can cause all sorts of weird errors.
1151 *
1152 * \param haptic Haptic device to pause.
1153 * \return 0 on success or -1 on error.
1154 *
1155 * \sa SDL_HapticUnpause
1156 */
1157extern DECLSPEC int SDLCALL SDL_HapticPause(SDL_Haptic * haptic);
1158
1159/**
1160 * \brief Unpauses a haptic device.
1161 *
1162 * Call to unpause after SDL_HapticPause().
1163 *
1164 * \param haptic Haptic device to unpause.
1165 * \return 0 on success or -1 on error.
1166 *
1167 * \sa SDL_HapticPause
1168 */
1169extern DECLSPEC int SDLCALL SDL_HapticUnpause(SDL_Haptic * haptic);
1170
1171/**
1172 * \brief Stops all the currently playing effects on a haptic device.
1173 *
1174 * \param haptic Haptic device to stop.
1175 * \return 0 on success or -1 on error.
1176 */
1177extern DECLSPEC int SDLCALL SDL_HapticStopAll(SDL_Haptic * haptic);
1178
1179/**
1180 * \brief Checks to see if rumble is supported on a haptic device.
1181 *
1182 * \param haptic Haptic device to check to see if it supports rumble.
1183 * \return SDL_TRUE if effect is supported, SDL_FALSE if it isn't or -1 on error.
1184 *
1185 * \sa SDL_HapticRumbleInit
1186 * \sa SDL_HapticRumblePlay
1187 * \sa SDL_HapticRumbleStop
1188 */
1189extern DECLSPEC int SDLCALL SDL_HapticRumbleSupported(SDL_Haptic * haptic);
1190
1191/**
1192 * \brief Initializes the haptic device for simple rumble playback.
1193 *
1194 * \param haptic Haptic device to initialize for simple rumble playback.
1195 * \return 0 on success or -1 on error.
1196 *
1197 * \sa SDL_HapticOpen
1198 * \sa SDL_HapticRumbleSupported
1199 * \sa SDL_HapticRumblePlay
1200 * \sa SDL_HapticRumbleStop
1201 */
1202extern DECLSPEC int SDLCALL SDL_HapticRumbleInit(SDL_Haptic * haptic);
1203
1204/**
1205 * \brief Runs simple rumble on a haptic device
1206 *
1207 * \param haptic Haptic device to play rumble effect on.
1208 * \param strength Strength of the rumble to play as a 0-1 float value.
1209 * \param length Length of the rumble to play in milliseconds.
1210 * \return 0 on success or -1 on error.
1211 *
1212 * \sa SDL_HapticRumbleSupported
1213 * \sa SDL_HapticRumbleInit
1214 * \sa SDL_HapticRumbleStop
1215 */
1216extern DECLSPEC int SDLCALL SDL_HapticRumblePlay(SDL_Haptic * haptic, float strength, Uint32 length );
1217
1218/**
1219 * \brief Stops the simple rumble on a haptic device.
1220 *
1221 * \param haptic Haptic to stop the rumble on.
1222 * \return 0 on success or -1 on error.
1223 *
1224 * \sa SDL_HapticRumbleSupported
1225 * \sa SDL_HapticRumbleInit
1226 * \sa SDL_HapticRumblePlay
1227 */
1228extern DECLSPEC int SDLCALL SDL_HapticRumbleStop(SDL_Haptic * haptic);
1229
1230/* Ends C function definitions when using C++ */
1231#ifdef __cplusplus
1232}
1233#endif
1234#include "close_code.h"
1235
1236#endif /* SDL_haptic_h_ */
1237
1238/* vi: set ts=4 sw=4 expandtab: */
1239