mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-09-10 16:53:15 +02:00
578 lines
26 KiB
C
Executable File
578 lines
26 KiB
C
Executable File
#ifndef LIBRETRO_H__
|
|
#define LIBRETRO_H__
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
#include <limits.h>
|
|
|
|
// Hack applied for MSVC when compiling in C89 mode as it isn't C99 compliant.
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#else
|
|
#if defined(_MSC_VER) && !defined(SN_TARGET_PS3) && !defined(__cplusplus)
|
|
#define bool unsigned char
|
|
#define true 1
|
|
#define false 0
|
|
#else
|
|
#include <stdbool.h>
|
|
#endif
|
|
#endif
|
|
|
|
// Used for checking API/ABI mismatches that can break libretro implementations.
|
|
// It is not incremented for compatible changes.
|
|
#define RETRO_API_VERSION 1
|
|
|
|
// Libretro's fundamental device abstractions.
|
|
#define RETRO_DEVICE_MASK 0xff
|
|
#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.
|
|
#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
|
|
|
|
// These device types are specializations of the base types above.
|
|
// They should only be used in retro_set_controller_type() to inform libretro implementations
|
|
// about use of a very specific device type.
|
|
//
|
|
// In input state callback, however, only the base type should be used in the 'device' field.
|
|
#define RETRO_DEVICE_JOYPAD_MULTITAP ((1 << 8) | RETRO_DEVICE_JOYPAD)
|
|
#define RETRO_DEVICE_LIGHTGUN_SUPER_SCOPE ((1 << 8) | RETRO_DEVICE_LIGHTGUN)
|
|
#define RETRO_DEVICE_LIGHTGUN_JUSTIFIER ((2 << 8) | RETRO_DEVICE_LIGHTGUN)
|
|
#define RETRO_DEVICE_LIGHTGUN_JUSTIFIERS ((3 << 8) | RETRO_DEVICE_LIGHTGUN)
|
|
|
|
// 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
|
|
|
|
// 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
|
|
|
|
// Returned from retro_get_region().
|
|
#define RETRO_REGION_NTSC 0
|
|
#define RETRO_REGION_PAL 1
|
|
|
|
// 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 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
|
|
|
|
// Special memory types.
|
|
#define RETRO_MEMORY_SNES_BSX_RAM ((1 << 8) | RETRO_MEMORY_SAVE_RAM)
|
|
#define RETRO_MEMORY_SNES_BSX_PRAM ((2 << 8) | RETRO_MEMORY_SAVE_RAM)
|
|
#define RETRO_MEMORY_SNES_SUFAMI_TURBO_A_RAM ((3 << 8) | RETRO_MEMORY_SAVE_RAM)
|
|
#define RETRO_MEMORY_SNES_SUFAMI_TURBO_B_RAM ((4 << 8) | RETRO_MEMORY_SAVE_RAM)
|
|
#define RETRO_MEMORY_SNES_GAME_BOY_RAM ((5 << 8) | RETRO_MEMORY_SAVE_RAM)
|
|
#define RETRO_MEMORY_SNES_GAME_BOY_RTC ((6 << 8) | RETRO_MEMORY_RTC)
|
|
|
|
// Special game types passed into retro_load_game_special().
|
|
// Only used when multiple ROMs are required.
|
|
#define RETRO_GAME_TYPE_BSX 0x101
|
|
#define RETRO_GAME_TYPE_BSX_SLOTTED 0x102
|
|
#define RETRO_GAME_TYPE_SUFAMI_TURBO 0x103
|
|
#define RETRO_GAME_TYPE_SUPER_GAME_BOY 0x104
|
|
|
|
// 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
|
|
};
|
|
|
|
// 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.
|
|
//
|
|
#define RETRO_ENVIRONMENT_GET_VARIABLE 4 // struct retro_variable * --
|
|
// Interface to aquire user-defined information from environment
|
|
// that cannot feasibly be supported in a multi-system way.
|
|
// Mostly used for obscure,
|
|
// specific features that the user can tap into when neseccary.
|
|
//
|
|
#define RETRO_ENVIRONMENT_SET_VARIABLES 5 // const struct retro_variable * --
|
|
// Allows an implementation to signal the environment
|
|
// which variables it might want to check for later using GET_VARIABLE.
|
|
// 'data' points to an array of retro_variable structs terminated by a { NULL, NULL } element.
|
|
// retro_variable::value should contain a human readable description of the key.
|
|
//
|
|
#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 to 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", but roughly defined as:
|
|
// 0: Low-powered embedded devices such as Raspberry Pi
|
|
// 1: 6th generation consoles, such as Wii/Xbox 1, and phones, tablets, etc.
|
|
// 2: 7th generation consoles, such as PS3/360, with sub-par CPUs.
|
|
// 3: Modern desktop/laptops with reasonably powerful CPUs.
|
|
// 4: High-end desktops with very powerful CPUs.
|
|
//
|
|
// This function can be called on a per-game basis,
|
|
// as certain games an implementation can play might be
|
|
// particularily 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 ROMs 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.
|
|
//
|
|
#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.
|
|
|
|
|
|
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;
|
|
|
|
const char *description; // Human readable description for parameters.
|
|
// The pointer must remain valid until retro_unload_game() is called.
|
|
};
|
|
|
|
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 rom 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.
|
|
|
|
bool need_fullpath; // 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 block_extract; // If true, the frontend is not allowed to extract any archives before loading the real ROM.
|
|
// Necessary for certain libretro implementations that load games from zipped archives.
|
|
};
|
|
|
|
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
|
|
{
|
|
const char *key; // 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 *value; // Value to be obtained. If key does not exist, it is set to NULL.
|
|
};
|
|
|
|
struct retro_game_info
|
|
{
|
|
const char *path; // Path to game, UTF-8 encoded. Usually used as a reference.
|
|
// May be NULL if rom was loaded from stdin or similar.
|
|
// retro_system_info::need_fullpath guaranteed 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.
|
|
};
|
|
|
|
// Callbacks
|
|
//
|
|
// Environment callback. Gives implementations a way of performing uncommon tasks. Extensible.
|
|
typedef bool (*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_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_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_audio_sample_batch_t)(const int16_t *data, size_t frames);
|
|
|
|
// Polls input.
|
|
typedef void (*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_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.
|
|
void retro_set_environment(retro_environment_t);
|
|
void retro_set_video_refresh(retro_video_refresh_t);
|
|
void retro_set_audio_sample(retro_audio_sample_t);
|
|
void retro_set_audio_sample_batch(retro_audio_sample_batch_t);
|
|
void retro_set_input_poll(retro_input_poll_t);
|
|
void retro_set_input_state(retro_input_state_t);
|
|
|
|
// Library global initialization/deinitialization.
|
|
void retro_init(void);
|
|
void retro_deinit(void);
|
|
|
|
// Must return RETRO_API_VERSION. Used to validate ABI compatibility when the API is revised.
|
|
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().
|
|
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.
|
|
void retro_get_system_av_info(struct retro_system_av_info *info);
|
|
|
|
// Sets device to be used for player 'port'.
|
|
void retro_set_controller_port_device(unsigned port, unsigned device);
|
|
|
|
// Resets the current game.
|
|
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.
|
|
void retro_run(void);
|
|
|
|
// Returns the amount of data the implementation requires to serialize internal state (save states).
|
|
// Beetween 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.
|
|
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.
|
|
bool retro_serialize(void *data, size_t size);
|
|
bool retro_unserialize(const void *data, size_t size);
|
|
|
|
void retro_cheat_reset(void);
|
|
void retro_cheat_set(unsigned index, bool enabled, const char *code);
|
|
|
|
// Loads a game.
|
|
bool retro_load_game(const struct retro_game_info *game);
|
|
|
|
// Loads a "special" kind of game. Should not be used except in extreme cases.
|
|
bool retro_load_game_special(
|
|
unsigned game_type,
|
|
const struct retro_game_info *info, size_t num_info
|
|
);
|
|
|
|
// Unloads a currently loaded game.
|
|
void retro_unload_game(void);
|
|
|
|
// Gets region of game.
|
|
unsigned retro_get_region(void);
|
|
|
|
// Gets region of memory.
|
|
void *retro_get_memory_data(unsigned id);
|
|
size_t retro_get_memory_size(unsigned id);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|