-
Notifications
You must be signed in to change notification settings - Fork 0
/
libretro.h
executable file
·2129 lines (1907 loc) · 100 KB
/
libretro.h
1
2
3
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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
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
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
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
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
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
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
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
563
564
565
566
567
568
569
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
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
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
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
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
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* Copyright (C) 2010-2016 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this libretro API header (libretro.h).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef LIBRETRO_H__
#define LIBRETRO_H__
#include <stdint.h>
#include <stddef.h>
#include <limits.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __cplusplus
#if defined(_MSC_VER) && !defined(SN_TARGET_PS3)
/* Hack applied for MSVC when compiling in C89 mode
* as it isn't C99-compliant. */
#define bool unsigned char
#define true 1
#define false 0
#else
#include <stdbool.h>
#endif
#endif
#ifndef RETRO_CALLCONV
# if defined(__GNUC__) && defined(__i386__) && !defined(__x86_64__)
# define RETRO_CALLCONV __attribute__((cdecl))
# elif defined(_MSC_VER) && defined(_M_X86) && !defined(_M_X64)
# define RETRO_CALLCONV __cdecl
# else
# define RETRO_CALLCONV /* all other platforms only have one calling convention each */
# endif
#endif
#ifndef RETRO_API
# if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
# ifdef RETRO_IMPORT_SYMBOLS
# ifdef __GNUC__
# define RETRO_API RETRO_CALLCONV __attribute__((__dllimport__))
# else
# define RETRO_API RETRO_CALLCONV __declspec(dllimport)
# endif
# else
# ifdef __GNUC__
# define RETRO_API RETRO_CALLCONV __attribute__((__dllexport__))
# else
# define RETRO_API RETRO_CALLCONV __declspec(dllexport)
# endif
# endif
# else
# if defined(__GNUC__) && __GNUC__ >= 4 && !defined(__CELLOS_LV2__)
# define RETRO_API RETRO_CALLCONV __attribute__((__visibility__("default")))
# else
# define RETRO_API RETRO_CALLCONV
# endif
# endif
#endif
/* Used for checking API/ABI mismatches that can break libretro
* implementations.
* It is not incremented for compatible changes to the API.
*/
#define RETRO_API_VERSION 1
/*
* Libretro's fundamental device abstractions.
*
* Libretro's input system consists of some standardized device types,
* such as a joypad (with/without analog), mouse, keyboard, lightgun
* and a pointer.
*
* The functionality of these devices are fixed, and individual cores
* map their own concept of a controller to libretro's abstractions.
* This makes it possible for frontends to map the abstract types to a
* real input device, and not having to worry about binding input
* correctly to arbitrary controller layouts.
*/
#define RETRO_DEVICE_TYPE_SHIFT 8
#define RETRO_DEVICE_MASK ((1 << RETRO_DEVICE_TYPE_SHIFT) - 1)
#define RETRO_DEVICE_SUBCLASS(base, id) (((id + 1) << RETRO_DEVICE_TYPE_SHIFT) | base)
/* Input disabled. */
#define RETRO_DEVICE_NONE 0
/* The JOYPAD is called RetroPad. It is essentially a Super Nintendo
* controller, but with additional L2/R2/L3/R3 buttons, similar to a
* PS1 DualShock. */
#define RETRO_DEVICE_JOYPAD 1
/* The mouse is a simple mouse, similar to Super Nintendo's mouse.
* X and Y coordinates are reported relatively to last poll (poll callback).
* It is up to the libretro implementation to keep track of where the mouse
* pointer is supposed to be on the screen.
* The frontend must make sure not to interfere with its own hardware
* mouse pointer.
*/
#define RETRO_DEVICE_MOUSE 2
/* KEYBOARD device lets one poll for raw key pressed.
* It is poll based, so input callback will return with the current
* pressed state.
* For event/text based keyboard input, see
* RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK.
*/
#define RETRO_DEVICE_KEYBOARD 3
/* Lightgun X/Y coordinates are reported relatively to last poll,
* similar to mouse. */
#define RETRO_DEVICE_LIGHTGUN 4
/* The ANALOG device is an extension to JOYPAD (RetroPad).
* Similar to DualShock it adds two analog sticks.
* This is treated as a separate device type as it returns values in the
* full analog range of [-0x8000, 0x7fff]. Positive X axis is right.
* Positive Y axis is down.
* Only use ANALOG type when polling for analog values of the axes.
*/
#define RETRO_DEVICE_ANALOG 5
/* Abstracts the concept of a pointing mechanism, e.g. touch.
* This allows libretro to query in absolute coordinates where on the
* screen a mouse (or something similar) is being placed.
* For a touch centric device, coordinates reported are the coordinates
* of the press.
*
* Coordinates in X and Y are reported as:
* [-0x7fff, 0x7fff]: -0x7fff corresponds to the far left/top of the screen,
* and 0x7fff corresponds to the far right/bottom of the screen.
* The "screen" is here defined as area that is passed to the frontend and
* later displayed on the monitor.
*
* The frontend is free to scale/resize this screen as it sees fit, however,
* (X, Y) = (-0x7fff, -0x7fff) will correspond to the top-left pixel of the
* game image, etc.
*
* To check if the pointer coordinates are valid (e.g. a touch display
* actually being touched), PRESSED returns 1 or 0.
*
* If using a mouse on a desktop, PRESSED will usually correspond to the
* left mouse button, but this is a frontend decision.
* PRESSED will only return 1 if the pointer is inside the game screen.
*
* For multi-touch, the index variable can be used to successively query
* more presses.
* If index = 0 returns true for _PRESSED, coordinates can be extracted
* with _X, _Y for index = 0. One can then query _PRESSED, _X, _Y with
* index = 1, and so on.
* Eventually _PRESSED will return false for an index. No further presses
* are registered at this point. */
#define RETRO_DEVICE_POINTER 6
/* Buttons for the RetroPad (JOYPAD).
* The placement of these is equivalent to placements on the
* Super Nintendo controller.
* L2/R2/L3/R3 buttons correspond to the PS1 DualShock. */
#define RETRO_DEVICE_ID_JOYPAD_B 0
#define RETRO_DEVICE_ID_JOYPAD_Y 1
#define RETRO_DEVICE_ID_JOYPAD_SELECT 2
#define RETRO_DEVICE_ID_JOYPAD_START 3
#define RETRO_DEVICE_ID_JOYPAD_UP 4
#define RETRO_DEVICE_ID_JOYPAD_DOWN 5
#define RETRO_DEVICE_ID_JOYPAD_LEFT 6
#define RETRO_DEVICE_ID_JOYPAD_RIGHT 7
#define RETRO_DEVICE_ID_JOYPAD_A 8
#define RETRO_DEVICE_ID_JOYPAD_X 9
#define RETRO_DEVICE_ID_JOYPAD_L 10
#define RETRO_DEVICE_ID_JOYPAD_R 11
#define RETRO_DEVICE_ID_JOYPAD_L2 12
#define RETRO_DEVICE_ID_JOYPAD_R2 13
#define RETRO_DEVICE_ID_JOYPAD_L3 14
#define RETRO_DEVICE_ID_JOYPAD_R3 15
/* Index / Id values for ANALOG device. */
#define RETRO_DEVICE_INDEX_ANALOG_LEFT 0
#define RETRO_DEVICE_INDEX_ANALOG_RIGHT 1
#define RETRO_DEVICE_ID_ANALOG_X 0
#define RETRO_DEVICE_ID_ANALOG_Y 1
/* Id values for MOUSE. */
#define RETRO_DEVICE_ID_MOUSE_X 0
#define RETRO_DEVICE_ID_MOUSE_Y 1
#define RETRO_DEVICE_ID_MOUSE_LEFT 2
#define RETRO_DEVICE_ID_MOUSE_RIGHT 3
#define RETRO_DEVICE_ID_MOUSE_WHEELUP 4
#define RETRO_DEVICE_ID_MOUSE_WHEELDOWN 5
#define RETRO_DEVICE_ID_MOUSE_MIDDLE 6
#define RETRO_DEVICE_ID_MOUSE_HORIZ_WHEELUP 7
#define RETRO_DEVICE_ID_MOUSE_HORIZ_WHEELDOWN 8
/* Id values for LIGHTGUN types. */
#define RETRO_DEVICE_ID_LIGHTGUN_X 0
#define RETRO_DEVICE_ID_LIGHTGUN_Y 1
#define RETRO_DEVICE_ID_LIGHTGUN_TRIGGER 2
#define RETRO_DEVICE_ID_LIGHTGUN_CURSOR 3
#define RETRO_DEVICE_ID_LIGHTGUN_TURBO 4
#define RETRO_DEVICE_ID_LIGHTGUN_PAUSE 5
#define RETRO_DEVICE_ID_LIGHTGUN_START 6
/* Id values for POINTER. */
#define RETRO_DEVICE_ID_POINTER_X 0
#define RETRO_DEVICE_ID_POINTER_Y 1
#define RETRO_DEVICE_ID_POINTER_PRESSED 2
/* Returned from retro_get_region(). */
#define RETRO_REGION_NTSC 0
#define RETRO_REGION_PAL 1
/* Id values for LANGUAGE */
enum retro_language
{
RETRO_LANGUAGE_ENGLISH = 0,
RETRO_LANGUAGE_JAPANESE = 1,
RETRO_LANGUAGE_FRENCH = 2,
RETRO_LANGUAGE_SPANISH = 3,
RETRO_LANGUAGE_GERMAN = 4,
RETRO_LANGUAGE_ITALIAN = 5,
RETRO_LANGUAGE_DUTCH = 6,
RETRO_LANGUAGE_PORTUGUESE = 7,
RETRO_LANGUAGE_RUSSIAN = 8,
RETRO_LANGUAGE_KOREAN = 9,
RETRO_LANGUAGE_CHINESE_TRADITIONAL = 10,
RETRO_LANGUAGE_CHINESE_SIMPLIFIED = 11,
RETRO_LANGUAGE_ESPERANTO = 12,
RETRO_LANGUAGE_POLISH = 13,
RETRO_LANGUAGE_LAST,
/* Ensure sizeof(enum) == sizeof(int) */
RETRO_LANGUAGE_DUMMY = INT_MAX
};
/* Passed to retro_get_memory_data/size().
* If the memory type doesn't apply to the
* implementation NULL/0 can be returned.
*/
#define RETRO_MEMORY_MASK 0xff
/* Regular save RAM. This RAM is usually found on a game cartridge,
* backed up by a battery.
* If save game data is too complex for a single memory buffer,
* the SAVE_DIRECTORY (preferably) or SYSTEM_DIRECTORY environment
* callback can be used. */
#define RETRO_MEMORY_SAVE_RAM 0
/* Some games have a built-in clock to keep track of time.
* This memory is usually just a couple of bytes to keep track of time.
*/
#define RETRO_MEMORY_RTC 1
/* System ram lets a frontend peek into a game systems main RAM. */
#define RETRO_MEMORY_SYSTEM_RAM 2
/* Video ram lets a frontend peek into a game systems video RAM (VRAM). */
#define RETRO_MEMORY_VIDEO_RAM 3
/* Keysyms used for ID in input state callback when polling RETRO_KEYBOARD. */
enum retro_key
{
RETROK_UNKNOWN = 0,
RETROK_FIRST = 0,
RETROK_BACKSPACE = 8,
RETROK_TAB = 9,
RETROK_CLEAR = 12,
RETROK_RETURN = 13,
RETROK_PAUSE = 19,
RETROK_ESCAPE = 27,
RETROK_SPACE = 32,
RETROK_EXCLAIM = 33,
RETROK_QUOTEDBL = 34,
RETROK_HASH = 35,
RETROK_DOLLAR = 36,
RETROK_AMPERSAND = 38,
RETROK_QUOTE = 39,
RETROK_LEFTPAREN = 40,
RETROK_RIGHTPAREN = 41,
RETROK_ASTERISK = 42,
RETROK_PLUS = 43,
RETROK_COMMA = 44,
RETROK_MINUS = 45,
RETROK_PERIOD = 46,
RETROK_SLASH = 47,
RETROK_0 = 48,
RETROK_1 = 49,
RETROK_2 = 50,
RETROK_3 = 51,
RETROK_4 = 52,
RETROK_5 = 53,
RETROK_6 = 54,
RETROK_7 = 55,
RETROK_8 = 56,
RETROK_9 = 57,
RETROK_COLON = 58,
RETROK_SEMICOLON = 59,
RETROK_LESS = 60,
RETROK_EQUALS = 61,
RETROK_GREATER = 62,
RETROK_QUESTION = 63,
RETROK_AT = 64,
RETROK_LEFTBRACKET = 91,
RETROK_BACKSLASH = 92,
RETROK_RIGHTBRACKET = 93,
RETROK_CARET = 94,
RETROK_UNDERSCORE = 95,
RETROK_BACKQUOTE = 96,
RETROK_a = 97,
RETROK_b = 98,
RETROK_c = 99,
RETROK_d = 100,
RETROK_e = 101,
RETROK_f = 102,
RETROK_g = 103,
RETROK_h = 104,
RETROK_i = 105,
RETROK_j = 106,
RETROK_k = 107,
RETROK_l = 108,
RETROK_m = 109,
RETROK_n = 110,
RETROK_o = 111,
RETROK_p = 112,
RETROK_q = 113,
RETROK_r = 114,
RETROK_s = 115,
RETROK_t = 116,
RETROK_u = 117,
RETROK_v = 118,
RETROK_w = 119,
RETROK_x = 120,
RETROK_y = 121,
RETROK_z = 122,
RETROK_DELETE = 127,
RETROK_KP0 = 256,
RETROK_KP1 = 257,
RETROK_KP2 = 258,
RETROK_KP3 = 259,
RETROK_KP4 = 260,
RETROK_KP5 = 261,
RETROK_KP6 = 262,
RETROK_KP7 = 263,
RETROK_KP8 = 264,
RETROK_KP9 = 265,
RETROK_KP_PERIOD = 266,
RETROK_KP_DIVIDE = 267,
RETROK_KP_MULTIPLY = 268,
RETROK_KP_MINUS = 269,
RETROK_KP_PLUS = 270,
RETROK_KP_ENTER = 271,
RETROK_KP_EQUALS = 272,
RETROK_UP = 273,
RETROK_DOWN = 274,
RETROK_RIGHT = 275,
RETROK_LEFT = 276,
RETROK_INSERT = 277,
RETROK_HOME = 278,
RETROK_END = 279,
RETROK_PAGEUP = 280,
RETROK_PAGEDOWN = 281,
RETROK_F1 = 282,
RETROK_F2 = 283,
RETROK_F3 = 284,
RETROK_F4 = 285,
RETROK_F5 = 286,
RETROK_F6 = 287,
RETROK_F7 = 288,
RETROK_F8 = 289,
RETROK_F9 = 290,
RETROK_F10 = 291,
RETROK_F11 = 292,
RETROK_F12 = 293,
RETROK_F13 = 294,
RETROK_F14 = 295,
RETROK_F15 = 296,
RETROK_NUMLOCK = 300,
RETROK_CAPSLOCK = 301,
RETROK_SCROLLOCK = 302,
RETROK_RSHIFT = 303,
RETROK_LSHIFT = 304,
RETROK_RCTRL = 305,
RETROK_LCTRL = 306,
RETROK_RALT = 307,
RETROK_LALT = 308,
RETROK_RMETA = 309,
RETROK_LMETA = 310,
RETROK_LSUPER = 311,
RETROK_RSUPER = 312,
RETROK_MODE = 313,
RETROK_COMPOSE = 314,
RETROK_HELP = 315,
RETROK_PRINT = 316,
RETROK_SYSREQ = 317,
RETROK_BREAK = 318,
RETROK_MENU = 319,
RETROK_POWER = 320,
RETROK_EURO = 321,
RETROK_UNDO = 322,
RETROK_LAST,
RETROK_DUMMY = INT_MAX /* Ensure sizeof(enum) == sizeof(int) */
};
enum retro_mod
{
RETROKMOD_NONE = 0x0000,
RETROKMOD_SHIFT = 0x01,
RETROKMOD_CTRL = 0x02,
RETROKMOD_ALT = 0x04,
RETROKMOD_META = 0x08,
RETROKMOD_NUMLOCK = 0x10,
RETROKMOD_CAPSLOCK = 0x20,
RETROKMOD_SCROLLOCK = 0x40,
RETROKMOD_DUMMY = INT_MAX /* Ensure sizeof(enum) == sizeof(int) */
};
/* If set, this call is not part of the public libretro API yet. It can
* change or be removed at any time. */
#define RETRO_ENVIRONMENT_EXPERIMENTAL 0x10000
/* Environment callback to be used internally in frontend. */
#define RETRO_ENVIRONMENT_PRIVATE 0x20000
/* Environment commands. */
#define RETRO_ENVIRONMENT_SET_ROTATION 1 /* const unsigned * --
* Sets screen rotation of graphics.
* Is only implemented if rotation can be accelerated by hardware.
* Valid values are 0, 1, 2, 3, which rotates screen by 0, 90, 180,
* 270 degrees counter-clockwise respectively.
*/
#define RETRO_ENVIRONMENT_GET_OVERSCAN 2 /* bool * --
* Boolean value whether or not the implementation should use overscan,
* or crop away overscan.
*/
#define RETRO_ENVIRONMENT_GET_CAN_DUPE 3 /* bool * --
* Boolean value whether or not frontend supports frame duping,
* passing NULL to video frame callback.
*/
/* Environ 4, 5 are no longer supported (GET_VARIABLE / SET_VARIABLES),
* and reserved to avoid possible ABI clash.
*/
#define RETRO_ENVIRONMENT_SET_MESSAGE 6 /* const struct retro_message * --
* Sets a message to be displayed in implementation-specific manner
* for a certain amount of 'frames'.
* Should not be used for trivial messages, which should simply be
* logged via RETRO_ENVIRONMENT_GET_LOG_INTERFACE (or as a
* fallback, stderr).
*/
#define RETRO_ENVIRONMENT_SHUTDOWN 7 /* N/A (NULL) --
* Requests the frontend to shutdown.
* Should only be used if game has a specific
* way to shutdown the game from a menu item or similar.
*/
#define RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL 8
/* const unsigned * --
* Gives a hint to the frontend how demanding this implementation
* is on a system. E.g. reporting a level of 2 means
* this implementation should run decently on all frontends
* of level 2 and up.
*
* It can be used by the frontend to potentially warn
* about too demanding implementations.
*
* The levels are "floating".
*
* This function can be called on a per-game basis,
* as certain games an implementation can play might be
* particularly demanding.
* If called, it should be called in retro_load_game().
*/
#define RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY 9
/* const char ** --
* Returns the "system" directory of the frontend.
* This directory can be used to store system specific
* content such as BIOSes, configuration data, etc.
* The returned value can be NULL.
* If so, no such directory is defined,
* and it's up to the implementation to find a suitable directory.
*
* NOTE: Some cores used this folder also for "save" data such as
* memory cards, etc, for lack of a better place to put it.
* This is now discouraged, and if possible, cores should try to
* use the new GET_SAVE_DIRECTORY.
*/
#define RETRO_ENVIRONMENT_SET_PIXEL_FORMAT 10
/* const enum retro_pixel_format * --
* Sets the internal pixel format used by the implementation.
* The default pixel format is RETRO_PIXEL_FORMAT_0RGB1555.
* This pixel format however, is deprecated (see enum retro_pixel_format).
* If the call returns false, the frontend does not support this pixel
* format.
*
* This function should be called inside retro_load_game() or
* retro_get_system_av_info().
*/
#define RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS 11
/* const struct retro_input_descriptor * --
* Sets an array of retro_input_descriptors.
* It is up to the frontend to present this in a usable way.
* The array is terminated by retro_input_descriptor::description
* being set to NULL.
* This function can be called at any time, but it is recommended
* to call it as early as possible.
*/
#define RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK 12
/* const struct retro_keyboard_callback * --
* Sets a callback function used to notify core about keyboard events.
*/
#define RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE 13
/* const struct retro_disk_control_callback * --
* Sets an interface which frontend can use to eject and insert
* disk images.
* This is used for games which consist of multiple images and
* must be manually swapped out by the user (e.g. PSX).
*/
#define RETRO_ENVIRONMENT_SET_HW_RENDER 14
/* struct retro_hw_render_callback * --
* Sets an interface to let a libretro core render with
* hardware acceleration.
* Should be called in retro_load_game().
* If successful, libretro cores will be able to render to a
* frontend-provided framebuffer.
* The size of this framebuffer will be at least as large as
* max_width/max_height provided in get_av_info().
* If HW rendering is used, pass only RETRO_HW_FRAME_BUFFER_VALID or
* NULL to retro_video_refresh_t.
*/
#define RETRO_ENVIRONMENT_GET_VARIABLE 15
/* struct retro_variable * --
* Interface to acquire user-defined information from environment
* that cannot feasibly be supported in a multi-system way.
* 'key' should be set to a key which has already been set by
* SET_VARIABLES.
* 'data' will be set to a value or NULL.
*/
#define RETRO_ENVIRONMENT_SET_VARIABLES 16
/* const struct retro_variable * --
* Allows an implementation to signal the environment
* which variables it might want to check for later using
* GET_VARIABLE.
* This allows the frontend to present these variables to
* a user dynamically.
* This should be called as early as possible (ideally in
* retro_set_environment).
*
* 'data' points to an array of retro_variable structs
* terminated by a { NULL, NULL } element.
* retro_variable::key should be namespaced to not collide
* with other implementations' keys. E.g. A core called
* 'foo' should use keys named as 'foo_option'.
* retro_variable::value should contain a human readable
* description of the key as well as a '|' delimited list
* of expected values.
*
* The number of possible options should be very limited,
* i.e. it should be feasible to cycle through options
* without a keyboard.
*
* First entry should be treated as a default.
*
* Example entry:
* { "foo_option", "Speed hack coprocessor X; false|true" }
*
* Text before first ';' is description. This ';' must be
* followed by a space, and followed by a list of possible
* values split up with '|'.
*
* Only strings are operated on. The possible values will
* generally be displayed and stored as-is by the frontend.
*/
#define RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE 17
/* bool * --
* Result is set to true if some variables are updated by
* frontend since last call to RETRO_ENVIRONMENT_GET_VARIABLE.
* Variables should be queried with GET_VARIABLE.
*/
#define RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME 18
/* const bool * --
* If true, the libretro implementation supports calls to
* retro_load_game() with NULL as argument.
* Used by cores which can run without particular game data.
* This should be called within retro_set_environment() only.
*/
#define RETRO_ENVIRONMENT_GET_LIBRETRO_PATH 19
/* const char ** --
* Retrieves the absolute path from where this libretro
* implementation was loaded.
* NULL is returned if the libretro was loaded statically
* (i.e. linked statically to frontend), or if the path cannot be
* determined.
* Mostly useful in cooperation with SET_SUPPORT_NO_GAME as assets can
* be loaded without ugly hacks.
*/
/* Environment 20 was an obsolete version of SET_AUDIO_CALLBACK.
* It was not used by any known core at the time,
* and was removed from the API. */
#define RETRO_ENVIRONMENT_SET_AUDIO_CALLBACK 22
/* const struct retro_audio_callback * --
* Sets an interface which is used to notify a libretro core about audio
* being available for writing.
* The callback can be called from any thread, so a core using this must
* have a thread safe audio implementation.
* It is intended for games where audio and video are completely
* asynchronous and audio can be generated on the fly.
* This interface is not recommended for use with emulators which have
* highly synchronous audio.
*
* The callback only notifies about writability; the libretro core still
* has to call the normal audio callbacks
* to write audio. The audio callbacks must be called from within the
* notification callback.
* The amount of audio data to write is up to the implementation.
* Generally, the audio callback will be called continously in a loop.
*
* Due to thread safety guarantees and lack of sync between audio and
* video, a frontend can selectively disallow this interface based on
* internal configuration. A core using this interface must also
* implement the "normal" audio interface.
*
* A libretro core using SET_AUDIO_CALLBACK should also make use of
* SET_FRAME_TIME_CALLBACK.
*/
#define RETRO_ENVIRONMENT_SET_FRAME_TIME_CALLBACK 21
/* const struct retro_frame_time_callback * --
* Lets the core know how much time has passed since last
* invocation of retro_run().
* The frontend can tamper with the timing to fake fast-forward,
* slow-motion, frame stepping, etc.
* In this case the delta time will use the reference value
* in frame_time_callback..
*/
#define RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE 23
/* struct retro_rumble_interface * --
* Gets an interface which is used by a libretro core to set
* state of rumble motors in controllers.
* A strong and weak motor is supported, and they can be
* controlled indepedently.
*/
#define RETRO_ENVIRONMENT_GET_INPUT_DEVICE_CAPABILITIES 24
/* uint64_t * --
* Gets a bitmask telling which device type are expected to be
* handled properly in a call to retro_input_state_t.
* Devices which are not handled or recognized always return
* 0 in retro_input_state_t.
* Example bitmask: caps = (1 << RETRO_DEVICE_JOYPAD) | (1 << RETRO_DEVICE_ANALOG).
* Should only be called in retro_run().
*/
#define RETRO_ENVIRONMENT_GET_SENSOR_INTERFACE (25 | RETRO_ENVIRONMENT_EXPERIMENTAL)
/* struct retro_sensor_interface * --
* Gets access to the sensor interface.
* The purpose of this interface is to allow
* setting state related to sensors such as polling rate,
* enabling/disable it entirely, etc.
* Reading sensor state is done via the normal
* input_state_callback API.
*/
#define RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE (26 | RETRO_ENVIRONMENT_EXPERIMENTAL)
/* struct retro_camera_callback * --
* Gets an interface to a video camera driver.
* A libretro core can use this interface to get access to a
* video camera.
* New video frames are delivered in a callback in same
* thread as retro_run().
*
* GET_CAMERA_INTERFACE should be called in retro_load_game().
*
* Depending on the camera implementation used, camera frames
* will be delivered as a raw framebuffer,
* or as an OpenGL texture directly.
*
* The core has to tell the frontend here which types of
* buffers can be handled properly.
* An OpenGL texture can only be handled when using a
* libretro GL core (SET_HW_RENDER).
* It is recommended to use a libretro GL core when
* using camera interface.
*
* The camera is not started automatically. The retrieved start/stop
* functions must be used to explicitly
* start and stop the camera driver.
*/
#define RETRO_ENVIRONMENT_GET_LOG_INTERFACE 27
/* struct retro_log_callback * --
* Gets an interface for logging. This is useful for
* logging in a cross-platform way
* as certain platforms cannot use use stderr for logging.
* It also allows the frontend to
* show logging information in a more suitable way.
* If this interface is not used, libretro cores should
* log to stderr as desired.
*/
#define RETRO_ENVIRONMENT_GET_PERF_INTERFACE 28
/* struct retro_perf_callback * --
* Gets an interface for performance counters. This is useful
* for performance logging in a cross-platform way and for detecting
* architecture-specific features, such as SIMD support.
*/
#define RETRO_ENVIRONMENT_GET_LOCATION_INTERFACE 29
/* struct retro_location_callback * --
* Gets access to the location interface.
* The purpose of this interface is to be able to retrieve
* location-based information from the host device,
* such as current latitude / longitude.
*/
#define RETRO_ENVIRONMENT_GET_CONTENT_DIRECTORY 30 /* Old name, kept for compatibility. */
#define RETRO_ENVIRONMENT_GET_CORE_ASSETS_DIRECTORY 30
/* const char ** --
* Returns the "core assets" directory of the frontend.
* This directory can be used to store specific assets that the
* core relies upon, such as art assets,
* input data, etc etc.
* The returned value can be NULL.
* If so, no such directory is defined,
* and it's up to the implementation to find a suitable directory.
*/
#define RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY 31
/* const char ** --
* Returns the "save" directory of the frontend.
* This directory can be used to store SRAM, memory cards,
* high scores, etc, if the libretro core
* cannot use the regular memory interface (retro_get_memory_data()).
*
* NOTE: libretro cores used to check GET_SYSTEM_DIRECTORY for
* similar things before.
* They should still check GET_SYSTEM_DIRECTORY if they want to
* be backwards compatible.
* The path here can be NULL. It should only be non-NULL if the
* frontend user has set a specific save path.
*/
#define RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO 32
/* const struct retro_system_av_info * --
* Sets a new av_info structure. This can only be called from
* within retro_run().
* This should *only* be used if the core is completely altering the
* internal resolutions, aspect ratios, timings, sampling rate, etc.
* Calling this can require a full reinitialization of video/audio
* drivers in the frontend,
*
* so it is important to call it very sparingly, and usually only with
* the users explicit consent.
* An eventual driver reinitialize will happen so that video and
* audio callbacks
* happening after this call within the same retro_run() call will
* target the newly initialized driver.
*
* This callback makes it possible to support configurable resolutions
* in games, which can be useful to
* avoid setting the "worst case" in max_width/max_height.
*
* ***HIGHLY RECOMMENDED*** Do not call this callback every time
* resolution changes in an emulator core if it's
* expected to be a temporary change, for the reasons of possible
* driver reinitialization.
* This call is not a free pass for not trying to provide
* correct values in retro_get_system_av_info(). If you need to change
* things like aspect ratio or nominal width/height,
* use RETRO_ENVIRONMENT_SET_GEOMETRY, which is a softer variant
* of SET_SYSTEM_AV_INFO.
*
* If this returns false, the frontend does not acknowledge a
* changed av_info struct.
*/
#define RETRO_ENVIRONMENT_SET_PROC_ADDRESS_CALLBACK 33
/* const struct retro_get_proc_address_interface * --
* Allows a libretro core to announce support for the
* get_proc_address() interface.
* This interface allows for a standard way to extend libretro where
* use of environment calls are too indirect,
* e.g. for cases where the frontend wants to call directly into the core.
*
* If a core wants to expose this interface, SET_PROC_ADDRESS_CALLBACK
* **MUST** be called from within retro_set_environment().
*/
#define RETRO_ENVIRONMENT_SET_SUBSYSTEM_INFO 34
/* const struct retro_subsystem_info * --
* This environment call introduces the concept of libretro "subsystems".
* A subsystem is a variant of a libretro core which supports
* different kinds of games.
* The purpose of this is to support e.g. emulators which might
* have special needs, e.g. Super Nintendo's Super GameBoy, Sufami Turbo.
* It can also be used to pick among subsystems in an explicit way
* if the libretro implementation is a multi-system emulator itself.
*
* Loading a game via a subsystem is done with retro_load_game_special(),
* and this environment call allows a libretro core to expose which
* subsystems are supported for use with retro_load_game_special().
* A core passes an array of retro_game_special_info which is terminated
* with a zeroed out retro_game_special_info struct.
*
* If a core wants to use this functionality, SET_SUBSYSTEM_INFO
* **MUST** be called from within retro_set_environment().
*/
#define RETRO_ENVIRONMENT_SET_CONTROLLER_INFO 35
/* const struct retro_controller_info * --
* This environment call lets a libretro core tell the frontend
* which controller types are recognized in calls to
* retro_set_controller_port_device().
*
* Some emulators such as Super Nintendo
* support multiple lightgun types which must be specifically
* selected from.
* It is therefore sometimes necessary for a frontend to be able
* to tell the core about a special kind of input device which is
* not covered by the libretro input API.
*
* In order for a frontend to understand the workings of an input device,
* it must be a specialized type
* of the generic device types already defined in the libretro API.
*
* Which devices are supported can vary per input port.
* The core must pass an array of const struct retro_controller_info which
* is terminated with a blanked out struct. Each element of the struct
* corresponds to an ascending port index to
* retro_set_controller_port_device().
* Even if special device types are set in the libretro core,
* libretro should only poll input based on the base input device types.
*/
#define RETRO_ENVIRONMENT_SET_MEMORY_MAPS (36 | RETRO_ENVIRONMENT_EXPERIMENTAL)
/* const struct retro_memory_map * --
* This environment call lets a libretro core tell the frontend
* about the memory maps this core emulates.
* This can be used to implement, for example, cheats in a core-agnostic way.
*
* Should only be used by emulators; it doesn't make much sense for
* anything else.
* It is recommended to expose all relevant pointers through
* retro_get_memory_* as well.
*
* Can be called from retro_init and retro_load_game.
*/
#define RETRO_ENVIRONMENT_SET_GEOMETRY 37
/* const struct retro_game_geometry * --
* This environment call is similar to SET_SYSTEM_AV_INFO for changing
* video parameters, but provides a guarantee that drivers will not be
* reinitialized.
* This can only be called from within retro_run().
*
* The purpose of this call is to allow a core to alter nominal
* width/heights as well as aspect ratios on-the-fly, which can be
* useful for some emulators to change in run-time.
*
* max_width/max_height arguments are ignored and cannot be changed
* with this call as this could potentially require a reinitialization or a
* non-constant time operation.
* If max_width/max_height are to be changed, SET_SYSTEM_AV_INFO is required.
*
* A frontend must guarantee that this environment call completes in
* constant time.
*/
#define RETRO_ENVIRONMENT_GET_USERNAME 38
/* const char **
* Returns the specified username of the frontend, if specified by the user.
* This username can be used as a nickname for a core that has online facilities
* or any other mode where personalization of the user is desirable.
* The returned value can be NULL.
* If this environ callback is used by a core that requires a valid username,
* a default username should be specified by the core.
*/
#define RETRO_ENVIRONMENT_GET_LANGUAGE 39
/* unsigned * --
* Returns the specified language of the frontend, if specified by the user.
* It can be used by the core for localization purposes.
*/
#define RETRO_ENVIRONMENT_GET_CURRENT_SOFTWARE_FRAMEBUFFER (40 | RETRO_ENVIRONMENT_EXPERIMENTAL)
/* struct retro_framebuffer * --
* Returns a preallocated framebuffer which the core can use for rendering
* the frame into when not using SET_HW_RENDER.
* The framebuffer returned from this call must not be used
* after the current call to retro_run() returns.
*
* The goal of this call is to allow zero-copy behavior where a core
* can render directly into video memory, avoiding extra bandwidth cost by copying
* memory from core to video memory.
*
* If this call succeeds and the core renders into it,
* the framebuffer pointer and pitch can be passed to retro_video_refresh_t.
* If the buffer from GET_CURRENT_SOFTWARE_FRAMEBUFFER is to be used,
* the core must pass the exact
* same pointer as returned by GET_CURRENT_SOFTWARE_FRAMEBUFFER;
* i.e. passing a pointer which is offset from the
* buffer is undefined. The width, height and pitch parameters
* must also match exactly to the values obtained from GET_CURRENT_SOFTWARE_FRAMEBUFFER.
*
* It is possible for a frontend to return a different pixel format
* than the one used in SET_PIXEL_FORMAT. This can happen if the frontend
* needs to perform conversion.
*
* It is still valid for a core to render to a different buffer
* even if GET_CURRENT_SOFTWARE_FRAMEBUFFER succeeds.
*
* A frontend must make sure that the pointer obtained from this function is
* writeable (and readable).
*/
enum retro_hw_render_interface_type
{
RETRO_HW_RENDER_INTERFACE_VULKAN = 0,
RETRO_HW_RENDER_INTERFACE_DUMMY = INT_MAX
};
/* Base struct. All retro_hw_render_interface_* types
* contain at least these fields. */
struct retro_hw_render_interface
{
enum retro_hw_render_interface_type interface_type;
unsigned interface_version;
};
#define RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE (41 | RETRO_ENVIRONMENT_EXPERIMENTAL)
/* const struct retro_hw_render_interface ** --
* Returns an API specific rendering interface for accessing API specific data.
* Not all HW rendering APIs support or need this.
* The contents of the returned pointer is specific to the rendering API
* being used. See the various headers like libretro_vulkan.h, etc.
*
* GET_HW_RENDER_INTERFACE cannot be called before context_reset has been called.
* Similarly, after context_destroyed callback returns,
* the contents of the HW_RENDER_INTERFACE are invalidated.
*/
#define RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS (42 | RETRO_ENVIRONMENT_EXPERIMENTAL)
/* const bool * --
* If true, the libretro implementation supports achievements
* either via memory descriptors set with RETRO_ENVIRONMENT_SET_MEMORY_MAPS
* or via retro_get_memory_data/retro_get_memory_size.
*
* This must be called before the first call to retro_run.
*/
enum retro_hw_render_context_negotiation_interface_type
{
RETRO_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE_VULKAN = 0,
RETRO_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE_DUMMY = INT_MAX
};
/* Base struct. All retro_hw_render_context_negotiation_interface_* types
* contain at least these fields. */
struct retro_hw_render_context_negotiation_interface
{
enum retro_hw_render_context_negotiation_interface_type interface_type;
unsigned interface_version;
};
#define RETRO_ENVIRONMENT_SET_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE (43 | RETRO_ENVIRONMENT_EXPERIMENTAL)
/* const struct retro_hw_render_context_negotiation_interface * --
* Sets an interface which lets the libretro core negotiate with frontend how a context is created.
* The semantics of this interface depends on which API is used in SET_HW_RENDER earlier.
* This interface will be used when the frontend is trying to create a HW rendering context,
* so it will be used after SET_HW_RENDER, but before the context_reset callback.
*/
#define RETRO_MEMDESC_CONST (1 << 0) /* The frontend will never change this memory area once retro_load_game has returned. */
#define RETRO_MEMDESC_BIGENDIAN (1 << 1) /* The memory area contains big endian data. Default is little endian. */
#define RETRO_MEMDESC_ALIGN_2 (1 << 16) /* All memory access in this area is aligned to their own size, or 2, whichever is smaller. */
#define RETRO_MEMDESC_ALIGN_4 (2 << 16)
#define RETRO_MEMDESC_ALIGN_8 (3 << 16)
#define RETRO_MEMDESC_MINSIZE_2 (1 << 24) /* All memory in this region is accessed at least 2 bytes at the time. */
#define RETRO_MEMDESC_MINSIZE_4 (2 << 24)
#define RETRO_MEMDESC_MINSIZE_8 (3 << 24)
struct retro_memory_descriptor
{
uint64_t flags;
/* Pointer to the start of the relevant ROM or RAM chip.
* It's strongly recommended to use 'offset' if possible, rather than
* doing math on the pointer.
*
* If the same byte is mapped my multiple descriptors, their descriptors
* must have the same pointer.
* If 'start' does not point to the first byte in the pointer, put the
* difference in 'offset' instead.
*
* May be NULL if there's nothing usable here (e.g. hardware registers and