repos/blastem: libretro.h comparison

comparison libretro.h @ 1687:6c54bb5fe3b3

Hacky WIP libertro implementation

author	Michael Pavone <pavone@retrodev.com>
date	Sun, 20 Jan 2019 01:03:21 -0800
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-:475e84bfccbb
+:6c54bb5fe3b3
+/* Copyright (C) 2010-2017 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) && _MSC_VER < 1800 && !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 device is similar to Guncon-2 for PlayStation 2.
+* It reports X/Y coordinates in screen space (similar to the pointer)
+* in the range [-0x8000, 0x7fff] in both axes, with zero being center.
+* As well as reporting on/off screen state. It features a trigger,
+* start/select buttons, auxiliary action buttons and a
+* directional pad. A forced off-screen shot can be requested for
+* auto-reloading function in some games.
+*/
+#define RETRO_DEVICE_LIGHTGUN     4
+/* The ANALOG device is an extension to JOYPAD (RetroPad).
+* Similar to DualShock2 it adds two analog sticks and all buttons can
+* be analog. This is treated as a separate device type as it returns
+* axis values in the full analog range of [-0x8000, 0x7fff].
+* Positive X axis is right. Positive Y axis is down.
+* Buttons are returned in the range [0, 0x7fff].
+* Only use ANALOG type when polling for analog values.
+*/
+#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.
+* Also used as id values for RETRO_DEVICE_INDEX_ANALOG_BUTTON */
+#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_INDEX_ANALOG_BUTTON     2
+#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
+#define RETRO_DEVICE_ID_MOUSE_BUTTON_4         9
+#define RETRO_DEVICE_ID_MOUSE_BUTTON_5         10
+/* Id values for LIGHTGUN. */
+#define RETRO_DEVICE_ID_LIGHTGUN_SCREEN_X        13 /*Absolute Position*/
+#define RETRO_DEVICE_ID_LIGHTGUN_SCREEN_Y        14 /*Absolute*/
+#define RETRO_DEVICE_ID_LIGHTGUN_IS_OFFSCREEN    15 /*Status Check*/
+#define RETRO_DEVICE_ID_LIGHTGUN_TRIGGER          2
+#define RETRO_DEVICE_ID_LIGHTGUN_RELOAD          16 /*Forced off-screen shot*/
+#define RETRO_DEVICE_ID_LIGHTGUN_AUX_A            3
+#define RETRO_DEVICE_ID_LIGHTGUN_AUX_B            4
+#define RETRO_DEVICE_ID_LIGHTGUN_START            6
+#define RETRO_DEVICE_ID_LIGHTGUN_SELECT           7
+#define RETRO_DEVICE_ID_LIGHTGUN_AUX_C            8
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_UP          9
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_DOWN       10
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_LEFT       11
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_RIGHT      12
+/* deprecated */
+#define RETRO_DEVICE_ID_LIGHTGUN_X                0 /*Relative Position*/
+#define RETRO_DEVICE_ID_LIGHTGUN_Y                1 /*Relative*/
+#define RETRO_DEVICE_ID_LIGHTGUN_CURSOR           3 /*Use Aux:A*/
+#define RETRO_DEVICE_ID_LIGHTGUN_TURBO            4 /*Use Aux:B*/
+#define RETRO_DEVICE_ID_LIGHTGUN_PAUSE            5 /*Use Start*/
+/* 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_BRAZIL   = 7,
+RETRO_LANGUAGE_PORTUGUESE_PORTUGAL = 8,
+RETRO_LANGUAGE_RUSSIAN             = 9,
+RETRO_LANGUAGE_KOREAN              = 10,
+RETRO_LANGUAGE_CHINESE_TRADITIONAL = 11,
+RETRO_LANGUAGE_CHINESE_SIMPLIFIED  = 12,
+RETRO_LANGUAGE_ESPERANTO           = 13,
+RETRO_LANGUAGE_POLISH              = 14,
+RETRO_LANGUAGE_VIETNAMESE          = 15,
+RETRO_LANGUAGE_ARABIC              = 16,
+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_LEFTBRACE      = 123,
+RETROK_BAR            = 124,
+RETROK_RIGHTBRACE     = 125,
+RETROK_TILDE          = 126,
+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 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).
+*/
+#define RETRO_ENVIRONMENT_SET_HW_SHARED_CONTEXT (44 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+/* N/A (null) * --
+* The frontend will try to use a 'shared' hardware context (mostly applicable
+* to OpenGL) when a hardware context is being set up.
+*
+* Returns true if the frontend supports shared hardware contexts and false
+* if the frontend does not support shared hardware contexts.
+*
+* This will do nothing on its own until SET_HW_RENDER env callbacks are
+* being used.
+*/
+#define RETRO_ENVIRONMENT_GET_VFS_INTERFACE (45 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+/* struct retro_vfs_interface_info * --
+* Gets access to the VFS interface.
+* VFS presence needs to be queried prior to load_game or any
+* get_system/save/other_directory being called to let front end know
+* core supports VFS before it starts handing out paths.
+* It is recomended to do so in retro_set_environment */
+/* VFS functionality */
+/* File paths:
+* File paths passed as parameters when using this api shall be well formed unix-style,
+* using "/" (unquoted forward slash) as directory separator regardless of the platform's native separator.
+* Paths shall also include at least one forward slash ("game.bin" is an invalid path, use "./game.bin" instead).
+* Other than the directory separator, cores shall not make assumptions about path format:
+* "C:/path/game.bin", "http://example.com/game.bin", "#game/game.bin", "./game.bin" (without quotes) are all valid paths.
+* Cores may replace the basename or remove path components from the end, and/or add new components;
+* however, cores shall not append "./", "../" or multiple consecutive forward slashes ("//") to paths they request to front end.
+* The frontend is encouraged to make such paths work as well as it can, but is allowed to give up if the core alters paths too much.
+* Frontends are encouraged, but not required, to support native file system paths (modulo replacing the directory separator, if applicable).
+* Cores are allowed to try using them, but must remain functional if the front rejects such requests.
+* Cores are encouraged to use the libretro-common filestream functions for file I/O,
+* as they seamlessly integrate with VFS, deal with directory separator replacement as appropriate
+* and provide platform-specific fallbacks in cases where front ends do not support VFS. */
+/* Opaque file handle
+* Introduced in VFS API v1 */
+struct retro_vfs_file_handle;
+/* File open flags
+* Introduced in VFS API v1 */
+#define RETRO_VFS_FILE_ACCESS_READ            (1 << 0) /* Read only mode */
+#define RETRO_VFS_FILE_ACCESS_WRITE           (1 << 1) /* Write only mode, discard contents and overwrites existing file unless RETRO_VFS_FILE_ACCESS_UPDATE is also specified */
+#define RETRO_VFS_FILE_ACCESS_READ_WRITE      (RETRO_VFS_FILE_ACCESS_READ | RETRO_VFS_FILE_ACCESS_WRITE) /* Read-write mode, discard contents and overwrites existing file unless RETRO_VFS_FILE_ACCESS_UPDATE is also specified*/
+#define RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING (1 << 2) /* Prevents discarding content of existing files opened for writing */
+/* These are only hints. The frontend may choose to ignore them. Other than RAM/CPU/etc use,
+and how they react to unlikely external interference (for example someone else writing to that file,
+or the file's server going down), behavior will not change. */
+#define RETRO_VFS_FILE_ACCESS_HINT_NONE              (0)
+/* Indicate that the file will be accessed many times. The frontend should aggressively cache everything. */
+#define RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS   (1 << 0)
+/* Seek positions */
+#define RETRO_VFS_SEEK_POSITION_START    0
+#define RETRO_VFS_SEEK_POSITION_CURRENT  1
+#define RETRO_VFS_SEEK_POSITION_END      2
+/* Get path from opaque handle. Returns the exact same path passed to file_open when getting the handle
+* Introduced in VFS API v1 */
+typedef const char *(RETRO_CALLCONV *retro_vfs_get_path_t)(struct retro_vfs_file_handle *stream);
+/* Open a file for reading or writing. If path points to a directory, this will
+* fail. Returns the opaque file handle, or NULL for error.
+* Introduced in VFS API v1 */
+typedef struct retro_vfs_file_handle *(RETRO_CALLCONV *retro_vfs_open_t)(const char *path, unsigned mode, unsigned hints);
+/* Close the file and release its resources. Must be called if open_file returns non-NULL. Returns 0 on succes, -1 on failure.
+* Whether the call succeeds ot not, the handle passed as parameter becomes invalid and should no longer be used.
+* Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_close_t)(struct retro_vfs_file_handle *stream);
+/* Return the size of the file in bytes, or -1 for error.
+* Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_size_t)(struct retro_vfs_file_handle *stream);
+/* Get the current read / write position for the file. Returns - 1 for error.
+* Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_tell_t)(struct retro_vfs_file_handle *stream);
+/* Set the current read/write position for the file. Returns the new position, -1 for error.
+* Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_seek_t)(struct retro_vfs_file_handle *stream, int64_t offset, int seek_position);
+/* Read data from a file. Returns the number of bytes read, or -1 for error.
+* Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_read_t)(struct retro_vfs_file_handle *stream, void *s, uint64_t len);
+/* Write data to a file. Returns the number of bytes written, or -1 for error.
+* Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_write_t)(struct retro_vfs_file_handle *stream, const void *s, uint64_t len);
+/* Flush pending writes to file, if using buffered IO. Returns 0 on sucess, or -1 on failure.
+* Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_flush_t)(struct retro_vfs_file_handle *stream);
+/* Delete the specified file. Returns 0 on success, -1 on failure
+* Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_remove_t)(const char *path);
+/* Rename the specified file. Returns 0 on success, -1 on failure
+* Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_rename_t)(const char *old_path, const char *new_path);
+struct retro_vfs_interface
+{
+	retro_vfs_get_path_t get_path;
+	retro_vfs_open_t open;
+	retro_vfs_close_t close;
+	retro_vfs_size_t size;
+	retro_vfs_tell_t tell;
+	retro_vfs_seek_t seek;
+	retro_vfs_read_t read;
+	retro_vfs_write_t write;
+	retro_vfs_flush_t flush;
+	retro_vfs_remove_t remove;
+	retro_vfs_rename_t rename;
+};
+struct retro_vfs_interface_info
+{
+/* Set by core: should this be higher than the version the front end supports,
+* front end will return false in the RETRO_ENVIRONMENT_GET_VFS_INTERFACE call
+* Introduced in VFS API v1 */
+uint32_t required_interface_version;
+/* Frontend writes interface pointer here. The frontend also sets the actual
+* version, must be at least required_interface_version.
+* Introduced in VFS API v1 */
+struct retro_vfs_interface *iface;
+};
+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_LED_INTERFACE (46 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+/* struct retro_led_interface * --
+* Gets an interface which is used by a libretro core to set
+* state of LEDs.
+*/
+typedef void (RETRO_CALLCONV *retro_set_led_state_t)(int led, int state);
+struct retro_led_interface
+{
+retro_set_led_state_t set_led_state;
+};
+#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.
+*/
+/* Serialized state is incomplete in some way. Set if serialization is
+* usable in typical end-user cases but should not be relied upon to
+* implement frame-sensitive frontend features such as netplay or
+* rerecording. */
+#define RETRO_SERIALIZATION_QUIRK_INCOMPLETE (1 << 0)
+/* The core must spend some time initializing before serialization is
+* supported. retro_serialize() will initially fail; retro_unserialize()
+* and retro_serialize_size() may or may not work correctly either. */
+#define RETRO_SERIALIZATION_QUIRK_MUST_INITIALIZE (1 << 1)
+/* Serialization size may change within a session. */
+#define RETRO_SERIALIZATION_QUIRK_CORE_VARIABLE_SIZE (1 << 2)
+/* Set by the frontend to acknowledge that it supports variable-sized
+* states. */
+#define RETRO_SERIALIZATION_QUIRK_FRONT_VARIABLE_SIZE (1 << 3)
+/* Serialized state can only be loaded during the same session. */
+#define RETRO_SERIALIZATION_QUIRK_SINGLE_SESSION (1 << 4)
+/* Serialized state cannot be loaded on an architecture with a different
+* endianness from the one it was saved on. */
+#define RETRO_SERIALIZATION_QUIRK_ENDIAN_DEPENDENT (1 << 5)
+/* Serialized state cannot be loaded on a different platform from the one it
+* was saved on for reasons other than endianness, such as word size
+* dependence */
+#define RETRO_SERIALIZATION_QUIRK_PLATFORM_DEPENDENT (1 << 6)
+#define RETRO_ENVIRONMENT_SET_SERIALIZATION_QUIRKS 44
+/* uint64_t * --
+* Sets quirk flags associated with serialization. The frontend will zero any flags it doesn't
+* recognize or support. Should be set in either retro_init or retro_load_game, but not both.
+*/
+#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
+* open bus). No flags should be set if the pointer is NULL.
+* It's recommended to minimize the number of descriptors if possible,
+* but not mandatory. */
+void *ptr;
+size_t offset;
+/* This is the location in the emulated address space
+* where the mapping starts. */
+size_t start;
+/* Which bits must be same as in 'start' for this mapping to apply.
+* The first memory descriptor to claim a certain byte is the one
+* that applies.
+* A bit which is set in 'start' must also be set in this.
+* Can be zero, in which case each byte is assumed mapped exactly once.
+* In this case, 'len' must be a power of two. */
+size_t select;
+/* If this is nonzero, the set bits are assumed not connected to the
+* memory chip's address pins. */
+size_t disconnect;
+/* This one tells the size of the current memory area.
+* If, after start+disconnect are applied, the address is higher than
+* this, the highest bit of the address is cleared.
+*
+* If the address is still too high, the next highest bit is cleared.
+* Can be zero, in which case it's assumed to be infinite (as limited
+* by 'select' and 'disconnect'). */
+size_t len;
+/* To go from emulated address to physical address, the following
+* order applies:
+* Subtract 'start', pick off 'disconnect', apply 'len', add 'offset'. */
+/* The address space name must consist of only a-zA-Z0-9_-,
+* should be as short as feasible (maximum length is 8 plus the NUL),
+* and may not be any other address space plus one or more 0-9A-F
+* at the end.
+* However, multiple memory descriptors for the same address space is
+* allowed, and the address space name can be empty. NULL is treated
+* as empty.
+*
+* Address space names are case sensitive, but avoid lowercase if possible.
+* The same pointer may exist in multiple address spaces.
+*
+* Examples:
+* blank+blank - valid (multiple things may be mapped in the same namespace)
+* 'Sp'+'Sp' - valid (multiple things may be mapped in the same namespace)
+* 'A'+'B' - valid (neither is a prefix of each other)
+* 'S'+blank - valid ('S' is not in 0-9A-F)
+* 'a'+blank - valid ('a' is not in 0-9A-F)
+* 'a'+'A' - valid (neither is a prefix of each other)
+* 'AR'+blank - valid ('R' is not in 0-9A-F)
+* 'ARB'+blank - valid (the B can't be part of the address either, because
+*                      there is no namespace 'AR')
+* blank+'B' - not valid, because it's ambigous which address space B1234
+*             would refer to.
+* The length can't be used for that purpose; the frontend may want
+* to append arbitrary data to an address, without a separator. */
+const char *addrspace;
+/* TODO: When finalizing this one, add a description field, which should be
+* "WRAM" or something roughly equally long. */
+/* TODO: When finalizing this one, replace 'select' with 'limit', which tells
+* which bits can vary and still refer to the same address (limit = ~select).
+* TODO: limit? range? vary? something else? */
+/* TODO: When finalizing this one, if 'len' is above what 'select' (or
+* 'limit') allows, it's bankswitched. Bankswitched data must have both 'len'
+* and 'select' != 0, and the mappings don't tell how the system switches the
+* banks. */
+/* TODO: When finalizing this one, fix the 'len' bit removal order.
+* For len=0x1800, pointer 0x1C00 should go to 0x1400, not 0x0C00.
+* Algorithm: Take bits highest to lowest, but if it goes above len, clear
+* the most recent addition and continue on the next bit.
+* TODO: Can the above be optimized? Is "remove the lowest bit set in both
+* pointer and 'len'" equivalent? */
+/* TODO: Some emulators (MAME?) emulate big endian systems by only accessing
+* the emulated memory in 32-bit chunks, native endian. But that's nothing
+* compared to Darek Mihocka <http://www.emulators.com/docs/nx07_vm101.htm>
+* (section Emulation 103 - Nearly Free Byte Reversal) - he flips the ENTIRE
+* RAM backwards! I'll want to represent both of those, via some flags.
+*
+* I suspect MAME either didn't think of that idea, or don't want the #ifdef.
+* Not sure which, nor do I really care. */
+/* TODO: Some of those flags are unused and/or don't really make sense. Clean
+* them up. */
+};
+/* The frontend may use the largest value of 'start'+'select' in a
+* certain namespace to infer the size of the address space.
+*
+* If the address space is larger than that, a mapping with .ptr=NULL
+* should be at the end of the array, with .select set to all ones for
+* as long as the address space is big.
+*
+* Sample descriptors (minus .ptr, and RETRO_MEMFLAG_ on the flags):
+* SNES WRAM:
+* .start=0x7E0000, .len=0x20000
+* (Note that this must be mapped before the ROM in most cases; some of the
+* ROM mappers
+* try to claim $7E0000, or at least $7E8000.)
+* SNES SPC700 RAM:
+* .addrspace="S", .len=0x10000
+* SNES WRAM mirrors:
+* .flags=MIRROR, .start=0x000000, .select=0xC0E000, .len=0x2000
+* .flags=MIRROR, .start=0x800000, .select=0xC0E000, .len=0x2000
+* SNES WRAM mirrors, alternate equivalent descriptor:
+* .flags=MIRROR, .select=0x40E000, .disconnect=~0x1FFF
+* (Various similar constructions can be created by combining parts of
+* the above two.)
+* SNES LoROM (512KB, mirrored a couple of times):
+* .flags=CONST, .start=0x008000, .select=0x408000, .disconnect=0x8000, .len=512*1024
+* .flags=CONST, .start=0x400000, .select=0x400000, .disconnect=0x8000, .len=512*1024
+* SNES HiROM (4MB):
+* .flags=CONST,                 .start=0x400000, .select=0x400000, .len=4*1024*1024
+* .flags=CONST, .offset=0x8000, .start=0x008000, .select=0x408000, .len=4*1024*1024
+* SNES ExHiROM (8MB):
+* .flags=CONST, .offset=0,                  .start=0xC00000, .select=0xC00000, .len=4*1024*1024
+* .flags=CONST, .offset=4*1024*1024,        .start=0x400000, .select=0xC00000, .len=4*1024*1024
+* .flags=CONST, .offset=0x8000,             .start=0x808000, .select=0xC08000, .len=4*1024*1024
+* .flags=CONST, .offset=4*1024*1024+0x8000, .start=0x008000, .select=0xC08000, .len=4*1024*1024
+* Clarify the size of the address space:
+* .ptr=NULL, .select=0xFFFFFF
+* .len can be implied by .select in many of them, but was included for clarity.
+*/
+struct retro_memory_map
+{
+const struct retro_memory_descriptor *descriptors;
+unsigned num_descriptors;
+};
+struct retro_controller_description
+{
+/* Human-readable description of the controller. Even if using a generic
+* input device type, this can be set to the particular device type the
+* core uses. */
+const char *desc;
+/* Device type passed to retro_set_controller_port_device(). If the device
+* type is a sub-class of a generic input device type, use the
+* RETRO_DEVICE_SUBCLASS macro to create an ID.
+*
+* E.g. RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 1). */
+unsigned id;
+};
+struct retro_controller_info
+{
+const struct retro_controller_description *types;
+unsigned num_types;
+};
+struct retro_subsystem_memory_info
+{
+/* The extension associated with a memory type, e.g. "psram". */
+const char *extension;
+/* The memory type for retro_get_memory(). This should be at
+* least 0x100 to avoid conflict with standardized
+* libretro memory types. */
+unsigned type;
+};
+struct retro_subsystem_rom_info
+{
+/* Describes what the content is (SGB BIOS, GB ROM, etc). */
+const char *desc;
+/* Same definition as retro_get_system_info(). */
+const char *valid_extensions;
+/* Same definition as retro_get_system_info(). */
+bool need_fullpath;
+/* Same definition as retro_get_system_info(). */
+bool block_extract;
+/* This is set if the content is required to load a game.
+* If this is set to false, a zeroed-out retro_game_info can be passed. */
+bool required;
+/* Content can have multiple associated persistent
+* memory types (retro_get_memory()). */
+const struct retro_subsystem_memory_info *memory;
+unsigned num_memory;
+};
+struct retro_subsystem_info
+{
+/* Human-readable string of the subsystem type, e.g. "Super GameBoy" */
+const char *desc;
+/* A computer friendly short string identifier for the subsystem type.
+* This name must be [a-z].
+* E.g. if desc is "Super GameBoy", this can be "sgb".
+* This identifier can be used for command-line interfaces, etc.
+*/
+const char *ident;
+/* Infos for each content file. The first entry is assumed to be the
+* "most significant" content for frontend purposes.
+* E.g. with Super GameBoy, the first content should be the GameBoy ROM,
+* as it is the most "significant" content to a user.
+* If a frontend creates new file paths based on the content used
+* (e.g. savestates), it should use the path for the first ROM to do so. */
+const struct retro_subsystem_rom_info *roms;
+/* Number of content files associated with a subsystem. */
+unsigned num_roms;
+/* The type passed to retro_load_game_special(). */
+unsigned id;
+};
+typedef void (RETRO_CALLCONV *retro_proc_address_t)(void);
+/* libretro API extension functions:
+* (None here so far).
+*
+* Get a symbol from a libretro core.
+* Cores should only return symbols which are actual
+* extensions to the libretro API.
+*
+* Frontends should not use this to obtain symbols to standard
+* libretro entry points (static linking or dlsym).
+*
+* The symbol name must be equal to the function name,
+* e.g. if void retro_foo(void); exists, the symbol must be called "retro_foo".
+* The returned function pointer must be cast to the corresponding type.
+*/
+typedef retro_proc_address_t (RETRO_CALLCONV *retro_get_proc_address_t)(const char *sym);
+struct retro_get_proc_address_interface
+{
+retro_get_proc_address_t get_proc_address;
+};
+enum retro_log_level
+{
+RETRO_LOG_DEBUG = 0,
+RETRO_LOG_INFO,
+RETRO_LOG_WARN,
+RETRO_LOG_ERROR,
+RETRO_LOG_DUMMY = INT_MAX
+};
+/* Logging function. Takes log level argument as well. */
+typedef void (RETRO_CALLCONV *retro_log_printf_t)(enum retro_log_level level,
+const char *fmt, ...);
+struct retro_log_callback
+{
+retro_log_printf_t log;
+};
+/* Performance related functions */
+/* ID values for SIMD CPU features */
+#define RETRO_SIMD_SSE      (1 << 0)
+#define RETRO_SIMD_SSE2     (1 << 1)
+#define RETRO_SIMD_VMX      (1 << 2)
+#define RETRO_SIMD_VMX128   (1 << 3)
+#define RETRO_SIMD_AVX      (1 << 4)
+#define RETRO_SIMD_NEON     (1 << 5)
+#define RETRO_SIMD_SSE3     (1 << 6)
+#define RETRO_SIMD_SSSE3    (1 << 7)
+#define RETRO_SIMD_MMX      (1 << 8)
+#define RETRO_SIMD_MMXEXT   (1 << 9)
+#define RETRO_SIMD_SSE4     (1 << 10)
+#define RETRO_SIMD_SSE42    (1 << 11)
+#define RETRO_SIMD_AVX2     (1 << 12)
+#define RETRO_SIMD_VFPU     (1 << 13)
+#define RETRO_SIMD_PS       (1 << 14)
+#define RETRO_SIMD_AES      (1 << 15)
+#define RETRO_SIMD_VFPV3    (1 << 16)
+#define RETRO_SIMD_VFPV4    (1 << 17)
+#define RETRO_SIMD_POPCNT   (1 << 18)
+#define RETRO_SIMD_MOVBE    (1 << 19)
+#define RETRO_SIMD_CMOV     (1 << 20)
+#define RETRO_SIMD_ASIMD    (1 << 21)
+typedef uint64_t retro_perf_tick_t;
+typedef int64_t retro_time_t;
+struct retro_perf_counter
+{
+const char *ident;
+retro_perf_tick_t start;
+retro_perf_tick_t total;
+retro_perf_tick_t call_cnt;
+bool registered;
+};
+/* Returns current time in microseconds.
+* Tries to use the most accurate timer available.
+*/
+typedef retro_time_t (RETRO_CALLCONV *retro_perf_get_time_usec_t)(void);
+/* A simple counter. Usually nanoseconds, but can also be CPU cycles.
+* Can be used directly if desired (when creating a more sophisticated
+* performance counter system).
+* */
+typedef retro_perf_tick_t (RETRO_CALLCONV *retro_perf_get_counter_t)(void);
+/* Returns a bit-mask of detected CPU features (RETRO_SIMD_*). */
+typedef uint64_t (RETRO_CALLCONV *retro_get_cpu_features_t)(void);
+/* Asks frontend to log and/or display the state of performance counters.
+* Performance counters can always be poked into manually as well.
+*/
+typedef void (RETRO_CALLCONV *retro_perf_log_t)(void);
+/* Register a performance counter.
+* ident field must be set with a discrete value and other values in
+* retro_perf_counter must be 0.
+* Registering can be called multiple times. To avoid calling to
+* frontend redundantly, you can check registered field first. */
+typedef void (RETRO_CALLCONV *retro_perf_register_t)(struct retro_perf_counter *counter);
+/* Starts a registered counter. */
+typedef void (RETRO_CALLCONV *retro_perf_start_t)(struct retro_perf_counter *counter);
+/* Stops a registered counter. */
+typedef void (RETRO_CALLCONV *retro_perf_stop_t)(struct retro_perf_counter *counter);
+/* For convenience it can be useful to wrap register, start and stop in macros.
+* E.g.:
+* #ifdef LOG_PERFORMANCE
+* #define RETRO_PERFORMANCE_INIT(perf_cb, name) static struct retro_perf_counter name = {#name}; if (!name.registered) perf_cb.perf_register(&(name))
+* #define RETRO_PERFORMANCE_START(perf_cb, name) perf_cb.perf_start(&(name))
+* #define RETRO_PERFORMANCE_STOP(perf_cb, name) perf_cb.perf_stop(&(name))
+* #else
+* ... Blank macros ...
+* #endif
+*
+* These can then be used mid-functions around code snippets.
+*
+* extern struct retro_perf_callback perf_cb;  * Somewhere in the core.
+*
+* void do_some_heavy_work(void)
+* {
+*    RETRO_PERFORMANCE_INIT(cb, work_1;
+*    RETRO_PERFORMANCE_START(cb, work_1);
+*    heavy_work_1();
+*    RETRO_PERFORMANCE_STOP(cb, work_1);
+*
+*    RETRO_PERFORMANCE_INIT(cb, work_2);
+*    RETRO_PERFORMANCE_START(cb, work_2);
+*    heavy_work_2();
+*    RETRO_PERFORMANCE_STOP(cb, work_2);
+* }
+*
+* void retro_deinit(void)
+* {
+*    perf_cb.perf_log();  * Log all perf counters here for example.
+* }
+*/
+struct retro_perf_callback
+{
+retro_perf_get_time_usec_t    get_time_usec;
+retro_get_cpu_features_t      get_cpu_features;
+retro_perf_get_counter_t      get_perf_counter;
+retro_perf_register_t         perf_register;
+retro_perf_start_t            perf_start;
+retro_perf_stop_t             perf_stop;
+retro_perf_log_t              perf_log;
+};
+/* FIXME: Document the sensor API and work out behavior.
+* It will be marked as experimental until then.
+*/
+enum retro_sensor_action
+{
+RETRO_SENSOR_ACCELEROMETER_ENABLE = 0,
+RETRO_SENSOR_ACCELEROMETER_DISABLE,
+RETRO_SENSOR_DUMMY = INT_MAX
+};
+/* Id values for SENSOR types. */
+#define RETRO_SENSOR_ACCELEROMETER_X 0
+#define RETRO_SENSOR_ACCELEROMETER_Y 1
+#define RETRO_SENSOR_ACCELEROMETER_Z 2
+typedef bool (RETRO_CALLCONV *retro_set_sensor_state_t)(unsigned port,
+enum retro_sensor_action action, unsigned rate);
+typedef float (RETRO_CALLCONV *retro_sensor_get_input_t)(unsigned port, unsigned id);
+struct retro_sensor_interface
+{
+retro_set_sensor_state_t set_sensor_state;
+retro_sensor_get_input_t get_sensor_input;
+};
+enum retro_camera_buffer
+{
+RETRO_CAMERA_BUFFER_OPENGL_TEXTURE = 0,
+RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER,
+RETRO_CAMERA_BUFFER_DUMMY = INT_MAX
+};
+/* Starts the camera driver. Can only be called in retro_run(). */
+typedef bool (RETRO_CALLCONV *retro_camera_start_t)(void);
+/* Stops the camera driver. Can only be called in retro_run(). */
+typedef void (RETRO_CALLCONV *retro_camera_stop_t)(void);
+/* Callback which signals when the camera driver is initialized
+* and/or deinitialized.
+* retro_camera_start_t can be called in initialized callback.
+*/
+typedef void (RETRO_CALLCONV *retro_camera_lifetime_status_t)(void);
+/* A callback for raw framebuffer data. buffer points to an XRGB8888 buffer.
+* Width, height and pitch are similar to retro_video_refresh_t.
+* First pixel is top-left origin.
+*/
+typedef void (RETRO_CALLCONV *retro_camera_frame_raw_framebuffer_t)(const uint32_t *buffer,
+unsigned width, unsigned height, size_t pitch);
+/* A callback for when OpenGL textures are used.
+*
+* texture_id is a texture owned by camera driver.
+* Its state or content should be considered immutable, except for things like
+* texture filtering and clamping.
+*
+* texture_target is the texture target for the GL texture.
+* These can include e.g. GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE, and possibly
+* more depending on extensions.
+*
+* affine points to a packed 3x3 column-major matrix used to apply an affine
+* transform to texture coordinates. (affine_matrix * vec3(coord_x, coord_y, 1.0))
+* After transform, normalized texture coord (0, 0) should be bottom-left
+* and (1, 1) should be top-right (or (width, height) for RECTANGLE).
+*
+* GL-specific typedefs are avoided here to avoid relying on gl.h in
+* the API definition.
+*/
+typedef void (RETRO_CALLCONV *retro_camera_frame_opengl_texture_t)(unsigned texture_id,
+unsigned texture_target, const float *affine);
+struct retro_camera_callback
+{
+/* Set by libretro core.
+* Example bitmask: caps = (1 << RETRO_CAMERA_BUFFER_OPENGL_TEXTURE) | (1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER).
+*/
+uint64_t caps;
+/* Desired resolution for camera. Is only used as a hint. */
+unsigned width;
+unsigned height;
+/* Set by frontend. */
+retro_camera_start_t start;
+retro_camera_stop_t stop;
+/* Set by libretro core if raw framebuffer callbacks will be used. */
+retro_camera_frame_raw_framebuffer_t frame_raw_framebuffer;
+/* Set by libretro core if OpenGL texture callbacks will be used. */
+retro_camera_frame_opengl_texture_t frame_opengl_texture;
+/* Set by libretro core. Called after camera driver is initialized and
+* ready to be started.
+* Can be NULL, in which this callback is not called.
+*/
+retro_camera_lifetime_status_t initialized;
+/* Set by libretro core. Called right before camera driver is
+* deinitialized.
+* Can be NULL, in which this callback is not called.
+*/
+retro_camera_lifetime_status_t deinitialized;
+};
+/* Sets the interval of time and/or distance at which to update/poll
+* location-based data.
+*
+* To ensure compatibility with all location-based implementations,
+* values for both interval_ms and interval_distance should be provided.
+*
+* interval_ms is the interval expressed in milliseconds.
+* interval_distance is the distance interval expressed in meters.
+*/
+typedef void (RETRO_CALLCONV *retro_location_set_interval_t)(unsigned interval_ms,
+unsigned interval_distance);
+/* Start location services. The device will start listening for changes to the
+* current location at regular intervals (which are defined with
+* retro_location_set_interval_t). */
+typedef bool (RETRO_CALLCONV *retro_location_start_t)(void);
+/* Stop location services. The device will stop listening for changes
+* to the current location. */
+typedef void (RETRO_CALLCONV *retro_location_stop_t)(void);
+/* Get the position of the current location. Will set parameters to
+* 0 if no new  location update has happened since the last time. */
+typedef bool (RETRO_CALLCONV *retro_location_get_position_t)(double *lat, double *lon,
+double *horiz_accuracy, double *vert_accuracy);
+/* Callback which signals when the location driver is initialized
+* and/or deinitialized.
+* retro_location_start_t can be called in initialized callback.
+*/
+typedef void (RETRO_CALLCONV *retro_location_lifetime_status_t)(void);
+struct retro_location_callback
+{
+retro_location_start_t         start;
+retro_location_stop_t          stop;
+retro_location_get_position_t  get_position;
+retro_location_set_interval_t  set_interval;
+retro_location_lifetime_status_t initialized;
+retro_location_lifetime_status_t deinitialized;
+};
+enum retro_rumble_effect
+{
+RETRO_RUMBLE_STRONG = 0,
+RETRO_RUMBLE_WEAK = 1,
+RETRO_RUMBLE_DUMMY = INT_MAX
+};
+/* Sets rumble state for joypad plugged in port 'port'.
+* Rumble effects are controlled independently,
+* and setting e.g. strong rumble does not override weak rumble.
+* Strength has a range of [0, 0xffff].
+*
+* Returns true if rumble state request was honored.
+* Calling this before first retro_run() is likely to return false. */
+typedef bool (RETRO_CALLCONV *retro_set_rumble_state_t)(unsigned port,
+enum retro_rumble_effect effect, uint16_t strength);
+struct retro_rumble_interface
+{
+retro_set_rumble_state_t set_rumble_state;
+};
+/* Notifies libretro that audio data should be written. */
+typedef void (RETRO_CALLCONV *retro_audio_callback_t)(void);
+/* True: Audio driver in frontend is active, and callback is
+* expected to be called regularily.
+* False: Audio driver in frontend is paused or inactive.
+* Audio callback will not be called until set_state has been
+* called with true.
+* Initial state is false (inactive).
+*/
+typedef void (RETRO_CALLCONV *retro_audio_set_state_callback_t)(bool enabled);
+struct retro_audio_callback
+{
+retro_audio_callback_t callback;
+retro_audio_set_state_callback_t set_state;
+};
+/* Notifies a libretro core of time spent since last invocation
+* of retro_run() in microseconds.
+*
+* It will be called right before retro_run() every frame.
+* The frontend can tamper with timing to support cases like
+* fast-forward, slow-motion and framestepping.
+*
+* In those scenarios the reference frame time value will be used. */
+typedef int64_t retro_usec_t;
+typedef void (RETRO_CALLCONV *retro_frame_time_callback_t)(retro_usec_t usec);
+struct retro_frame_time_callback
+{
+retro_frame_time_callback_t callback;
+/* Represents the time of one frame. It is computed as
+* 1000000 / fps, but the implementation will resolve the
+* rounding to ensure that framestepping, etc is exact. */
+retro_usec_t reference;
+};
+/* Pass this to retro_video_refresh_t if rendering to hardware.
+* Passing NULL to retro_video_refresh_t is still a frame dupe as normal.
+* */
+#define RETRO_HW_FRAME_BUFFER_VALID ((void*)-1)
+/* Invalidates the current HW context.
+* Any GL state is lost, and must not be deinitialized explicitly.
+* If explicit deinitialization is desired by the libretro core,
+* it should implement context_destroy callback.
+* If called, all GPU resources must be reinitialized.
+* Usually called when frontend reinits video driver.
+* Also called first time video driver is initialized,
+* allowing libretro core to initialize resources.
+*/
+typedef void (RETRO_CALLCONV *retro_hw_context_reset_t)(void);
+/* Gets current framebuffer which is to be rendered to.
+* Could change every frame potentially.
+*/
+typedef uintptr_t (RETRO_CALLCONV *retro_hw_get_current_framebuffer_t)(void);
+/* Get a symbol from HW context. */
+typedef retro_proc_address_t (RETRO_CALLCONV *retro_hw_get_proc_address_t)(const char *sym);
+enum retro_hw_context_type
+{
+RETRO_HW_CONTEXT_NONE             = 0,
+/* OpenGL 2.x. Driver can choose to use latest compatibility context. */
+RETRO_HW_CONTEXT_OPENGL           = 1,
+/* OpenGL ES 2.0. */
+RETRO_HW_CONTEXT_OPENGLES2        = 2,
+/* Modern desktop core GL context. Use version_major/
+* version_minor fields to set GL version. */
+RETRO_HW_CONTEXT_OPENGL_CORE      = 3,
+/* OpenGL ES 3.0 */
+RETRO_HW_CONTEXT_OPENGLES3        = 4,
+/* OpenGL ES 3.1+. Set version_major/version_minor. For GLES2 and GLES3,
+* use the corresponding enums directly. */
+RETRO_HW_CONTEXT_OPENGLES_VERSION = 5,
+/* Vulkan, see RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE. */
+RETRO_HW_CONTEXT_VULKAN           = 6,
+RETRO_HW_CONTEXT_DUMMY = INT_MAX
+};
+struct retro_hw_render_callback
+{
+/* Which API to use. Set by libretro core. */
+enum retro_hw_context_type context_type;
+/* Called when a context has been created or when it has been reset.
+* An OpenGL context is only valid after context_reset() has been called.
+*
+* When context_reset is called, OpenGL resources in the libretro
+* implementation are guaranteed to be invalid.
+*
+* It is possible that context_reset is called multiple times during an
+* application lifecycle.
+* If context_reset is called without any notification (context_destroy),
+* the OpenGL context was lost and resources should just be recreated
+* without any attempt to "free" old resources.
+*/
+retro_hw_context_reset_t context_reset;
+/* Set by frontend.
+* TODO: This is rather obsolete. The frontend should not
+* be providing preallocated framebuffers. */
+retro_hw_get_current_framebuffer_t get_current_framebuffer;
+/* Set by frontend.
+* Can return all relevant functions, including glClear on Windows. */
+retro_hw_get_proc_address_t get_proc_address;
+/* Set if render buffers should have depth component attached.
+* TODO: Obsolete. */
+bool depth;
+/* Set if stencil buffers should be attached.
+* TODO: Obsolete. */
+bool stencil;
+/* If depth and stencil are true, a packed 24/8 buffer will be added.
+* Only attaching stencil is invalid and will be ignored. */
+/* Use conventional bottom-left origin convention. If false,
+* standard libretro top-left origin semantics are used.
+* TODO: Move to GL specific interface. */
+bool bottom_left_origin;
+/* Major version number for core GL context or GLES 3.1+. */
+unsigned version_major;
+/* Minor version number for core GL context or GLES 3.1+. */
+unsigned version_minor;
+/* If this is true, the frontend will go very far to avoid
+* resetting context in scenarios like toggling fullscreen, etc.
+* TODO: Obsolete? Maybe frontend should just always assume this ...
+*/
+bool cache_context;
+/* The reset callback might still be called in extreme situations
+* such as if the context is lost beyond recovery.
+*
+* For optimal stability, set this to false, and allow context to be
+* reset at any time.
+*/
+/* A callback to be called before the context is destroyed in a
+* controlled way by the frontend. */
+retro_hw_context_reset_t context_destroy;
+/* OpenGL resources can be deinitialized cleanly at this step.
+* context_destroy can be set to NULL, in which resources will
+* just be destroyed without any notification.
+*
+* Even when context_destroy is non-NULL, it is possible that
+* context_reset is called without any destroy notification.
+* This happens if context is lost by external factors (such as
+* notified by GL_ARB_robustness).
+*
+* In this case, the context is assumed to be already dead,
+* and the libretro implementation must not try to free any OpenGL
+* resources in the subsequent context_reset.
+*/
+/* Creates a debug context. */
+bool debug_context;
+};
+/* Callback type passed in RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK.
+* Called by the frontend in response to keyboard events.
+* down is set if the key is being pressed, or false if it is being released.
+* keycode is the RETROK value of the char.
+* character is the text character of the pressed key. (UTF-32).
+* key_modifiers is a set of RETROKMOD values or'ed together.
+*
+* The pressed/keycode state can be indepedent of the character.
+* It is also possible that multiple characters are generated from a
+* single keypress.
+* Keycode events should be treated separately from character events.
+* However, when possible, the frontend should try to synchronize these.
+* If only a character is posted, keycode should be RETROK_UNKNOWN.
+*
+* Similarily if only a keycode event is generated with no corresponding
+* character, character should be 0.
+*/
+typedef void (RETRO_CALLCONV *retro_keyboard_event_t)(bool down, unsigned keycode,
+uint32_t character, uint16_t key_modifiers);
+struct retro_keyboard_callback
+{
+retro_keyboard_event_t callback;
+};
+/* Callbacks for RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE.
+* Should be set for implementations which can swap out multiple disk
+* images in runtime.
+*
+* If the implementation can do this automatically, it should strive to do so.
+* However, there are cases where the user must manually do so.
+*
+* Overview: To swap a disk image, eject the disk image with
+* set_eject_state(true).
+* Set the disk index with set_image_index(index). Insert the disk again
+* with set_eject_state(false).
+*/
+/* If ejected is true, "ejects" the virtual disk tray.
+* When ejected, the disk image index can be set.
+*/
+typedef bool (RETRO_CALLCONV *retro_set_eject_state_t)(bool ejected);
+/* Gets current eject state. The initial state is 'not ejected'. */
+typedef bool (RETRO_CALLCONV *retro_get_eject_state_t)(void);
+/* Gets current disk index. First disk is index 0.
+* If return value is >= get_num_images(), no disk is currently inserted.
+*/
+typedef unsigned (RETRO_CALLCONV *retro_get_image_index_t)(void);
+/* Sets image index. Can only be called when disk is ejected.
+* The implementation supports setting "no disk" by using an
+* index >= get_num_images().
+*/
+typedef bool (RETRO_CALLCONV *retro_set_image_index_t)(unsigned index);
+/* Gets total number of images which are available to use. */
+typedef unsigned (RETRO_CALLCONV *retro_get_num_images_t)(void);
+struct retro_game_info;
+/* Replaces the disk image associated with index.
+* Arguments to pass in info have same requirements as retro_load_game().
+* Virtual disk tray must be ejected when calling this.
+*
+* Replacing a disk image with info = NULL will remove the disk image
+* from the internal list.
+* As a result, calls to get_image_index() can change.
+*
+* E.g. replace_image_index(1, NULL), and previous get_image_index()
+* returned 4 before.
+* Index 1 will be removed, and the new index is 3.
+*/
+typedef bool (RETRO_CALLCONV *retro_replace_image_index_t)(unsigned index,
+const struct retro_game_info *info);
+/* Adds a new valid index (get_num_images()) to the internal disk list.
+* This will increment subsequent return values from get_num_images() by 1.
+* This image index cannot be used until a disk image has been set
+* with replace_image_index. */
+typedef bool (RETRO_CALLCONV *retro_add_image_index_t)(void);
+struct retro_disk_control_callback
+{
+retro_set_eject_state_t set_eject_state;
+retro_get_eject_state_t get_eject_state;
+retro_get_image_index_t get_image_index;
+retro_set_image_index_t set_image_index;
+retro_get_num_images_t  get_num_images;
+retro_replace_image_index_t replace_image_index;
+retro_add_image_index_t add_image_index;
+};
+enum retro_pixel_format
+{
+/* 0RGB1555, native endian.
+* 0 bit must be set to 0.
+* This pixel format is default for compatibility concerns only.
+* If a 15/16-bit pixel format is desired, consider using RGB565. */
+RETRO_PIXEL_FORMAT_0RGB1555 = 0,
+/* XRGB8888, native endian.
+* X bits are ignored. */
+RETRO_PIXEL_FORMAT_XRGB8888 = 1,
+/* RGB565, native endian.
+* This pixel format is the recommended format to use if a 15/16-bit
+* format is desired as it is the pixel format that is typically
+* available on a wide range of low-power devices.
+*
+* It is also natively supported in APIs like OpenGL ES. */
+RETRO_PIXEL_FORMAT_RGB565   = 2,
+/* Ensure sizeof() == sizeof(int). */
+RETRO_PIXEL_FORMAT_UNKNOWN  = INT_MAX
+};
+struct retro_message
+{
+const char *msg;        /* Message to be displayed. */
+unsigned    frames;     /* Duration in frames of message. */
+};
+/* Describes how the libretro implementation maps a libretro input bind
+* to its internal input system through a human readable string.
+* This string can be used to better let a user configure input. */
+struct retro_input_descriptor
+{
+/* Associates given parameters with a description. */
+unsigned port;
+unsigned device;
+unsigned index;
+unsigned id;
+/* Human readable description for parameters.
+* The pointer must remain valid until
+* retro_unload_game() is called. */
+const char *description;
+};
+struct retro_system_info
+{
+/* All pointers are owned by libretro implementation, and pointers must
+* remain valid until retro_deinit() is called. */
+const char *library_name;      /* Descriptive name of library. Should not
+* contain any version numbers, etc. */
+const char *library_version;   /* Descriptive version of core. */
+const char *valid_extensions;  /* A string listing probably content
+* extensions the core will be able to
+* load, separated with pipe.
+* I.e. "bin|rom|iso".
+* Typically used for a GUI to filter
+* out extensions. */
+/* If true, retro_load_game() is guaranteed to provide a valid pathname
+* in retro_game_info::path.
+* ::data and ::size are both invalid.
+*
+* If false, ::data and ::size are guaranteed to be valid, but ::path
+* might not be valid.
+*
+* This is typically set to true for libretro implementations that must
+* load from file.
+* Implementations should strive for setting this to false, as it allows
+* the frontend to perform patching, etc. */
+bool        need_fullpath;
+/* If true, the frontend is not allowed to extract any archives before
+* loading the real content.
+* Necessary for certain libretro implementations that load games
+* from zipped archives. */
+bool        block_extract;
+};
+struct retro_game_geometry
+{
+unsigned base_width;    /* Nominal video width of game. */
+unsigned base_height;   /* Nominal video height of game. */
+unsigned max_width;     /* Maximum possible width of game. */
+unsigned max_height;    /* Maximum possible height of game. */
+float    aspect_ratio;  /* Nominal aspect ratio of game. If
+* aspect_ratio is <= 0.0, an aspect ratio
+* of base_width / base_height is assumed.
+* A frontend could override this setting,
+* if desired. */
+};
+struct retro_system_timing
+{
+double fps;             /* FPS of video content. */
+double sample_rate;     /* Sampling rate of audio. */
+};
+struct retro_system_av_info
+{
+struct retro_game_geometry geometry;
+struct retro_system_timing timing;
+};
+struct retro_variable
+{
+/* Variable to query in RETRO_ENVIRONMENT_GET_VARIABLE.
+* If NULL, obtains the complete environment string if more
+* complex parsing is necessary.
+* The environment string is formatted as key-value pairs
+* delimited by semicolons as so:
+* "key1=value1;key2=value2;..."
+*/
+const char *key;
+/* Value to be obtained. If key does not exist, it is set to NULL. */
+const char *value;
+};
+struct retro_game_info
+{
+const char *path;       /* Path to game, UTF-8 encoded.
+* Sometimes used as a reference for building other paths.
+* May be NULL if game was loaded from stdin or similar,
+* but in this case some cores will be unable to load `data`.
+* So, it is preferable to fabricate something here instead
+* of passing NULL, which will help more cores to succeed.
+* retro_system_info::need_fullpath requires
+* that this path is valid. */
+const void *data;       /* Memory buffer of loaded game. Will be NULL
+* if need_fullpath was set. */
+size_t      size;       /* Size of memory buffer. */
+const char *meta;       /* String of implementation specific meta-data. */
+};
+#define RETRO_MEMORY_ACCESS_WRITE (1 << 0)
+/* The core will write to the buffer provided by retro_framebuffer::data. */
+#define RETRO_MEMORY_ACCESS_READ (1 << 1)
+/* The core will read from retro_framebuffer::data. */
+#define RETRO_MEMORY_TYPE_CACHED (1 << 0)
+/* The memory in data is cached.
+* If not cached, random writes and/or reading from the buffer is expected to be very slow. */
+struct retro_framebuffer
+{
+void *data;                      /* The framebuffer which the core can render into.
+Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER.
+The initial contents of data are unspecified. */
+unsigned width;                  /* The framebuffer width used by the core. Set by core. */
+unsigned height;                 /* The framebuffer height used by the core. Set by core. */
+size_t pitch;                    /* The number of bytes between the beginning of a scanline,
+and beginning of the next scanline.
+Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER. */
+enum retro_pixel_format format;  /* The pixel format the core must use to render into data.
+This format could differ from the format used in
+SET_PIXEL_FORMAT.
+Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER. */
+unsigned access_flags;           /* How the core will access the memory in the framebuffer.
+RETRO_MEMORY_ACCESS_* flags.
+Set by core. */
+unsigned memory_flags;           /* Flags telling core how the memory has been mapped.
+RETRO_MEMORY_TYPE_* flags.
+Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER. */
+};
+/* Callbacks */
+/* Environment callback. Gives implementations a way of performing
+* uncommon tasks. Extensible. */
+typedef bool (RETRO_CALLCONV *retro_environment_t)(unsigned cmd, void *data);
+/* Render a frame. Pixel format is 15-bit 0RGB1555 native endian
+* unless changed (see RETRO_ENVIRONMENT_SET_PIXEL_FORMAT).
+*
+* Width and height specify dimensions of buffer.
+* Pitch specifices length in bytes between two lines in buffer.
+*
+* For performance reasons, it is highly recommended to have a frame
+* that is packed in memory, i.e. pitch == width * byte_per_pixel.
+* Certain graphic APIs, such as OpenGL ES, do not like textures
+* that are not packed in memory.
+*/
+typedef void (RETRO_CALLCONV *retro_video_refresh_t)(const void *data, unsigned width,
+unsigned height, size_t pitch);
+/* Renders a single audio frame. Should only be used if implementation
+* generates a single sample at a time.
+* Format is signed 16-bit native endian.
+*/
+typedef void (RETRO_CALLCONV *retro_audio_sample_t)(int16_t left, int16_t right);
+/* Renders multiple audio frames in one go.
+*
+* One frame is defined as a sample of left and right channels, interleaved.
+* I.e. int16_t buf[4] = { l, r, l, r }; would be 2 frames.
+* Only one of the audio callbacks must ever be used.
+*/
+typedef size_t (RETRO_CALLCONV *retro_audio_sample_batch_t)(const int16_t *data,
+size_t frames);
+/* Polls input. */
+typedef void (RETRO_CALLCONV *retro_input_poll_t)(void);
+/* Queries for input for player 'port'. device will be masked with
+* RETRO_DEVICE_MASK.
+*
+* Specialization of devices such as RETRO_DEVICE_JOYPAD_MULTITAP that
+* have been set with retro_set_controller_port_device()
+* will still use the higher level RETRO_DEVICE_JOYPAD to request input.
+*/
+typedef int16_t (RETRO_CALLCONV *retro_input_state_t)(unsigned port, unsigned device,
+unsigned index, unsigned id);
+/* Sets callbacks. retro_set_environment() is guaranteed to be called
+* before retro_init().
+*
+* The rest of the set_* functions are guaranteed to have been called
+* before the first call to retro_run() is made. */
+RETRO_API void retro_set_environment(retro_environment_t);
+RETRO_API void retro_set_video_refresh(retro_video_refresh_t);
+RETRO_API void retro_set_audio_sample(retro_audio_sample_t);
+RETRO_API void retro_set_audio_sample_batch(retro_audio_sample_batch_t);
+RETRO_API void retro_set_input_poll(retro_input_poll_t);
+RETRO_API void retro_set_input_state(retro_input_state_t);
+/* Library global initialization/deinitialization. */
+RETRO_API void retro_init(void);
+RETRO_API void retro_deinit(void);
+/* Must return RETRO_API_VERSION. Used to validate ABI compatibility
+* when the API is revised. */
+RETRO_API unsigned retro_api_version(void);
+/* Gets statically known system info. Pointers provided in *info
+* must be statically allocated.
+* Can be called at any time, even before retro_init(). */
+RETRO_API void retro_get_system_info(struct retro_system_info *info);
+/* Gets information about system audio/video timings and geometry.
+* Can be called only after retro_load_game() has successfully completed.
+* NOTE: The implementation of this function might not initialize every
+* variable if needed.
+* E.g. geom.aspect_ratio might not be initialized if core doesn't
+* desire a particular aspect ratio. */
+RETRO_API void retro_get_system_av_info(struct retro_system_av_info *info);
+/* Sets device to be used for player 'port'.
+* By default, RETRO_DEVICE_JOYPAD is assumed to be plugged into all
+* available ports.
+* Setting a particular device type is not a guarantee that libretro cores
+* will only poll input based on that particular device type. It is only a
+* hint to the libretro core when a core cannot automatically detect the
+* appropriate input device type on its own. It is also relevant when a
+* core can change its behavior depending on device type. */
+RETRO_API void retro_set_controller_port_device(unsigned port, unsigned device);
+/* Resets the current game. */
+RETRO_API void retro_reset(void);
+/* Runs the game for one video frame.
+* During retro_run(), input_poll callback must be called at least once.
+*
+* If a frame is not rendered for reasons where a game "dropped" a frame,
+* this still counts as a frame, and retro_run() should explicitly dupe
+* a frame if GET_CAN_DUPE returns true.
+* In this case, the video callback can take a NULL argument for data.
+*/
+RETRO_API void retro_run(void);
+/* Returns the amount of data the implementation requires to serialize
+* internal state (save states).
+* Between calls to retro_load_game() and retro_unload_game(), the
+* returned size is never allowed to be larger than a previous returned
+* value, to ensure that the frontend can allocate a save state buffer once.
+*/
+RETRO_API size_t retro_serialize_size(void);
+/* Serializes internal state. If failed, or size is lower than
+* retro_serialize_size(), it should return false, true otherwise. */
+RETRO_API bool retro_serialize(void *data, size_t size);
+RETRO_API bool retro_unserialize(const void *data, size_t size);
+RETRO_API void retro_cheat_reset(void);
+RETRO_API void retro_cheat_set(unsigned index, bool enabled, const char *code);
+/* Loads a game. */
+RETRO_API bool retro_load_game(const struct retro_game_info *game);
+/* Loads a "special" kind of game. Should not be used,
+* except in extreme cases. */
+RETRO_API bool retro_load_game_special(
+unsigned game_type,
+const struct retro_game_info *info, size_t num_info
+);
+/* Unloads a currently loaded game. */
+RETRO_API void retro_unload_game(void);
+/* Gets region of game. */
+RETRO_API unsigned retro_get_region(void);
+/* Gets region of memory. */
+RETRO_API void *retro_get_memory_data(unsigned id);
+RETRO_API size_t retro_get_memory_size(unsigned id);
+#ifdef __cplusplus
+}
+#endif
+#endif

Mercurial > repos > blastem

comparison libretro.h @ 1687:6c54bb5fe3b3