mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-09 04:15:14 +01:00
334 lines
16 KiB
C
334 lines
16 KiB
C
|
#ifndef LIBRETRO_H__
|
||
|
|
#define LIBRETRO_H__
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#else
|
||
|
|
#if defined(_MSC_VER) && !defined(__cplusplus)
|
||
|
|
#define bool unsigned char
|
||
|
|
#define true 1
|
||
|
|
#define false 0
|
||
|
|
#else
|
||
|
|
#include <stdbool.h>
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define RETRO_API_VERSION 1
|
||
|
|
|
||
|
|
#define RETRO_DEVICE_MASK 0xff
|
||
|
|
#define RETRO_DEVICE_NONE 0
|
||
|
|
#define RETRO_DEVICE_JOYPAD 1
|
||
|
|
#define RETRO_DEVICE_MOUSE 2
|
||
|
|
#define RETRO_DEVICE_KEYBOARD 3
|
||
|
|
#define RETRO_DEVICE_LIGHTGUN 4
|
||
|
|
#define RETRO_DEVICE_ANALOG 5
|
||
|
|
|
||
|
|
#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)
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
#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_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
|
||
|
|
|
||
|
|
#define RETRO_REGION_NTSC 0
|
||
|
|
#define RETRO_REGION_PAL 1
|
||
|
|
|
||
|
|
#define RETRO_MEMORY_MASK 0xff
|
||
|
|
#define RETRO_MEMORY_SAVE_RAM 0
|
||
|
|
#define RETRO_MEMORY_RTC 1
|
||
|
|
#define RETRO_MEMORY_SYSTEM_RAM 2
|
||
|
|
#define RETRO_MEMORY_VIDEO_RAM 3
|
||
|
|
|
||
|
|
#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)
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
|
||
|
|
// 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 RetroArch 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:
|
||
|
|
// 1: Low-powered devices such as Raspberry Pi, smart phones, tablets, etc.
|
||
|
|
// 2: Medium-spec 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_XRGB1555.
|
||
|
|
// 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().
|
||
|
|
|
||
|
|
enum retro_pixel_format
|
||
|
|
{
|
||
|
|
RETRO_PIXEL_FORMAT_0RGB1555 = 0, // 0RGB1555, native endian. 0 bit must be set to 0.
|
||
|
|
RETRO_PIXEL_FORMAT_XRGB8888 // XRGB8888, native endian. X bits are ignored.
|
||
|
|
};
|
||
|
|
|
||
|
|
struct retro_message
|
||
|
|
{
|
||
|
|
const char *msg; // Message to be displayed.
|
||
|
|
unsigned frames; // Duration in frames of message.
|
||
|
|
};
|
||
|
|
|
||
|
|
struct retro_system_info
|
||
|
|
{
|
||
|
|
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.
|
||
|
|
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.
|
||
|
|
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
|