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initial libretro port

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This commit is contained in:
notaz 2013-06-27 03:33:41 +03:00
parent 4c2e35547f
commit 2446536be5
10 changed files with 1537 additions and 32 deletions
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19
platform/common/emu.c
View file

@ -144,9 +144,15 @@ void emu_status_msg(const char *format, ...)
notice_msg_time = plat_get_ticks_ms();
}
static const char * const biosfiles_us[] = { "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303" };
static const char * const biosfiles_eu[] = { "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303" };
static const char * const biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };
static const char * const biosfiles_us[] = {
"us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
};
static const char * const biosfiles_eu[] = {
"eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
};
static const char * const biosfiles_jp[] = {
"jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
};
static const char *find_bios(int *region, const char *cd_fname)
{
@ -916,9 +922,6 @@ void emu_32x_startup(void)
{
plat_video_toggle_renderer(0, 0); // HACK
system_announce();
// force mode change event
rendstatus_old = -1;
}
void emu_reset_game(void)
@ -1286,10 +1289,6 @@ void emu_loop(void)
fpsbuff[0] = 0;
/* make sure we are in correct mode */
Pico.m.dirtyPal = 1;
rendstatus_old = -1;
PicoLoopPrepare();
// prepare CD buffer

2
platform/libpicofe

@ -1 +1 @@
Subproject commit b57ed12e39ff8b0b678d18e5a729ea54ffb0542a
Subproject commit c2981fc0ee15d3b1aff69901550fda32460bb1b1

588
platform/libretro.c Normal file
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@ -0,0 +1,588 @@
/*
* libretro core glue for PicoDrive
* (C) notaz, 2013
*
* This work is licensed under the terms of MAME license.
* See COPYING file in the top-level directory.
*/
#define _GNU_SOURCE 1 // mremap
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <sys/mman.h>
#ifdef __MACH__
#include <libkern/OSCacheControl.h>
#endif
#include <pico/pico_int.h>
#include "common/input_pico.h"
#include "common/version.h"
#include "libretro.h"
static retro_video_refresh_t video_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
static retro_environment_t environ_cb;
static retro_audio_sample_batch_t audio_batch_cb;
static FILE *emu_log;
#define VOUT_MAX_WIDTH 320
#define VOUT_MAX_HEIGHT 240
static void *vout_buf;
static int vout_width, vout_height;
static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
// FIXME: these 2 shouldn't be here
static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)];
unsigned char *PicoDraw2FB = PicoDraw2FB_;
static void snd_write(int len);
#ifdef _WIN32
#define SLASH '\\'
#else
#define SLASH '/'
#endif
/* functions called by the core */
void cache_flush_d_inval_i(void *start, void *end)
{
#ifdef __arm__
#if defined(__BLACKBERRY_QNX__)
msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
#elif defined(__MACH__)
size_t len = (char *)end - (char *)start;
sys_dcache_flush(start, len);
sys_icache_invalidate(start, len);
#else
__clear_cache(start, end);
#endif
#endif
}
void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
{
int flags = MAP_PRIVATE | MAP_ANONYMOUS;
void *req, *ret;
req = (void *)addr;
ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
if (ret == MAP_FAILED)
return NULL;
if (addr != 0 && ret != (void *)addr) {
lprintf("warning: wanted to map @%08lx, got %p\n",
addr, ret);
if (is_fixed) {
munmap(ret, size);
return NULL;
}
}
return ret;
}
void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
{
void *ret = mremap(ptr, oldsize, newsize, 0);
if (ret == MAP_FAILED)
return NULL;
return ret;
}
void plat_munmap(void *ptr, size_t size)
{
if (ptr != NULL)
munmap(ptr, size);
}
void emu_video_mode_change(int start_line, int line_count, int is_32cols)
{
memset(vout_buf, 0, 320 * 240 * 2);
vout_width = is_32cols ? 256 : 320;
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
}
void emu_32x_startup(void)
{
PicoDrawSetOutFormat(PDF_RGB555, 1);
}
#ifndef ANDROID
void lprintf(const char *fmt, ...)
{
va_list list;
va_start(list, fmt);
fprintf(emu_log, "PicoDrive: ");
vfprintf(emu_log, fmt, list);
va_end(list);
fflush(emu_log);
}
#else
#include <android/log.h>
void lprintf(const char *fmt, ...)
{
va_list list;
va_start(list, fmt);
__android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
va_end(list);
}
#endif
/* libretro */
void retro_set_environment(retro_environment_t cb)
{
static const struct retro_variable vars[] = {
//{ "region", "Region; Auto|NTSC|PAL" },
{ NULL, NULL },
};
environ_cb = cb;
cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
}
void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
unsigned retro_api_version(void)
{
return RETRO_API_VERSION;
}
void retro_set_controller_port_device(unsigned port, unsigned device)
{
}
void retro_get_system_info(struct retro_system_info *info)
{
memset(info, 0, sizeof(*info));
info->library_name = "PicoDrive";
info->library_version = VERSION;
info->valid_extensions = "bin|gen|smd|32x|cue|iso|sms";
info->need_fullpath = true;
}
void retro_get_system_av_info(struct retro_system_av_info *info)
{
memset(info, 0, sizeof(*info));
info->timing.fps = Pico.m.pal ? 50 : 60;
info->timing.sample_rate = 44100;
info->geometry.base_width = 320;
info->geometry.base_height = 240;
info->geometry.max_width = VOUT_MAX_WIDTH;
info->geometry.max_height = VOUT_MAX_HEIGHT;
info->geometry.aspect_ratio = 4.0 / 3.0;
}
/* savestates - TODO */
size_t retro_serialize_size(void)
{
return 0;
}
bool retro_serialize(void *data, size_t size)
{
return false;
}
bool retro_unserialize(const void *data, size_t size)
{
return false;
}
/* cheats - TODO */
void retro_cheat_reset(void)
{
}
void retro_cheat_set(unsigned index, bool enabled, const char *code)
{
}
/* multidisk support */
static bool disk_ejected;
static unsigned int disk_current_index;
static unsigned int disk_count;
static struct disks_state {
char *fname;
} disks[8];
static bool disk_set_eject_state(bool ejected)
{
// TODO?
disk_ejected = ejected;
return true;
}
static bool disk_get_eject_state(void)
{
return disk_ejected;
}
static unsigned int disk_get_image_index(void)
{
return disk_current_index;
}
static bool disk_set_image_index(unsigned int index)
{
cd_img_type cd_type;
int ret;
if (index >= sizeof(disks) / sizeof(disks[0]))
return false;
if (disks[index].fname == NULL) {
lprintf("missing disk #%u\n", index);
// RetroArch specifies "no disk" with index == count,
// so don't fail here..
disk_current_index = index;
return true;
}
lprintf("switching to disk %u: \"%s\"\n", index,
disks[index].fname);
ret = -1;
cd_type = PicoCdCheck(disks[index].fname, NULL);
if (cd_type != CIT_NOT_CD)
ret = Insert_CD(disks[index].fname, cd_type);
if (ret != 0) {
lprintf("Load failed, invalid CD image?\n");
return 0;
}
disk_current_index = index;
return true;
}
static unsigned int disk_get_num_images(void)
{
return disk_count;
}
static bool disk_replace_image_index(unsigned index,
const struct retro_game_info *info)
{
bool ret = true;
if (index >= sizeof(disks) / sizeof(disks[0]))
return false;
if (disks[index].fname != NULL)
free(disks[index].fname);
disks[index].fname = NULL;
if (info != NULL) {
disks[index].fname = strdup(info->path);
if (index == disk_current_index)
ret = disk_set_image_index(index);
}
return ret;
}
static bool disk_add_image_index(void)
{
if (disk_count >= sizeof(disks) / sizeof(disks[0]))
return false;
disk_count++;
return true;
}
static struct retro_disk_control_callback disk_control = {
.set_eject_state = disk_set_eject_state,
.get_eject_state = disk_get_eject_state,
.get_image_index = disk_get_image_index,
.set_image_index = disk_set_image_index,
.get_num_images = disk_get_num_images,
.replace_image_index = disk_replace_image_index,
.add_image_index = disk_add_image_index,
};
static void disk_tray_open(void)
{
lprintf("cd tray open\n");
disk_ejected = 1;
}
static void disk_tray_close(void)
{
lprintf("cd tray close\n");
disk_ejected = 0;
}
static const char * const biosfiles_us[] = {
"us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
};
static const char * const biosfiles_eu[] = {
"eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
};
static const char * const biosfiles_jp[] = {
"jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
};
static void make_system_path(char *buf, size_t buf_size,
const char *name, const char *ext)
{
const char *dir = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
}
else {
snprintf(buf, buf_size, "%s%s", name, ext);
}
}
static const char *find_bios(int *region, const char *cd_fname)
{
const char * const *files;
static char path[256];
int i, count;
FILE *f = NULL;
if (*region == 4) { // US
files = biosfiles_us;
count = sizeof(biosfiles_us) / sizeof(char *);
} else if (*region == 8) { // EU
files = biosfiles_eu;
count = sizeof(biosfiles_eu) / sizeof(char *);
} else if (*region == 1 || *region == 2) {
files = biosfiles_jp;
count = sizeof(biosfiles_jp) / sizeof(char *);
} else {
return NULL;
}
for (i = 0; i < count; i++)
{
make_system_path(path, sizeof(path), files[i], ".bin");
f = fopen(path, "rb");
if (f != NULL)
break;
make_system_path(path, sizeof(path), files[i], ".zip");
f = fopen(path, "rb");
if (f != NULL)
break;
}
if (f != NULL) {
lprintf("using bios: %s\n", path);
fclose(f);
return path;
}
return NULL;
}
bool retro_load_game(const struct retro_game_info *info)
{
enum media_type_e media_type;
static char carthw_path[256];
size_t i;
enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
lprintf("RGB565 suppot required, sorry\n");
return false;
}
if (info == NULL || info->path == NULL) {
lprintf("info->path required\n");
return false;
}
for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
if (disks[i].fname != NULL) {
free(disks[i].fname);
disks[i].fname = NULL;
}
}
disk_current_index = 0;
disk_count = 1;
disks[0].fname = strdup(info->path);
make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
media_type = PicoLoadMedia(info->path, carthw_path,
find_bios, NULL);
switch (media_type) {
case PM_BAD_DETECT:
lprintf("Failed to detect ROM/CD image type.\n");
return false;
case PM_BAD_CD:
lprintf("Invalid CD image\n");
return false;
case PM_BAD_CD_NO_BIOS:
lprintf("Missing BIOS\n");
return false;
case PM_ERROR:
lprintf("Load error\n");
return false;
default:
break;
}
PicoLoopPrepare();
PicoWriteSound = snd_write;
memset(sndBuffer, 0, sizeof(sndBuffer));
PsndOut = sndBuffer;
PsndRerate(1);
return true;
}
bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
{
return false;
}
void retro_unload_game(void)
{
}
unsigned retro_get_region(void)
{
return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
}
void *retro_get_memory_data(unsigned id)
{
if (id != RETRO_MEMORY_SAVE_RAM)
return NULL;
if (PicoAHW & PAHW_MCD)
return Pico_mcd->bram;
else
return SRam.data;
}
size_t retro_get_memory_size(unsigned id)
{
if (id != RETRO_MEMORY_SAVE_RAM)
return 0;
if (PicoAHW & PAHW_MCD)
// bram
return 0x2000;
else
return SRam.size;
}
void retro_reset(void)
{
PicoReset();
}
static const unsigned short retro_pico_map[] = {
[RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
[RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
[RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
[RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
[RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
[RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
[RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
[RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
[RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
[RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
[RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
[RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
};
#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
static void snd_write(int len)
{
audio_batch_cb(PsndOut, len / 4);
}
void retro_run(void)
{
bool updated = false;
int pad, i;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
; //update_variables(true);
input_poll_cb();
PicoPad[0] = PicoPad[1] = 0;
for (pad = 0; pad < 2; pad++)
for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
PicoPad[pad] |= retro_pico_map[i];
PicoFrame();
video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
}
void retro_init(void)
{
int level;
#ifdef IOS
emu_log = fopen("/User/Documents/PicoDrive.log", "w");
if (emu_log == NULL)
emu_log = fopen("PicoDrive.log", "w");
if (emu_log == NULL)
#endif
emu_log = stdout;
level = 0;
environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
| POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC
| POPT_ACC_SPRITES|POPT_EN_32X|POPT_EN_PWM
| POPT_DIS_32C_BORDER;
PsndRate = 44100;
PicoAutoRgnOrder = 0x184; // US, EU, JP
PicoCDBuffers = 0;
p32x_msh2_multiplier = MSH2_MULTI_DEFAULT;
p32x_ssh2_multiplier = SSH2_MULTI_DEFAULT;
vout_width = 320;
vout_height = 240;
vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
PicoInit();
PicoDrawSetOutFormat(PDF_RGB555, 1);
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
//PicoMessage = plat_status_msg_busy_next;
PicoMCDopenTray = disk_tray_open;
PicoMCDcloseTray = disk_tray_close;
}
void retro_deinit(void)
{
PicoExit();
}

787
platform/libretro.h Normal file
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@ -0,0 +1,787 @@
/* Copyright (C) 2010-2013 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>
// 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 to the API.
#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
// 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, PRESSED will usually correspond to the left mouse button.
// 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
// 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
// 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
// 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,
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 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 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.
#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 | RETRO_ENVIRONMENT_EXPERIMENTAL)
// struct retro_hw_render_callback * --
// NOTE: This call is currently very experimental, and should not be considered part of the public API.
// The interface could be changed or removed at any time.
// 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 aquire 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.
// 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.
// 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 init resources.
typedef void (*retro_hw_context_reset_t)(void);
// Gets current framebuffer which is to be rendered to. Could change every frame potentially.
typedef uintptr_t (*retro_hw_get_current_framebuffer_t)(void);
// Get a symbol from HW context.
typedef void (*retro_proc_address_t)(void);
typedef retro_proc_address_t (*retro_hw_get_proc_address_t)(const char *sym);
enum retro_hw_context_type
{
RETRO_HW_CONTEXT_NONE = 0,
RETRO_HW_CONTEXT_OPENGL, // OpenGL 2.x. Latest version available before 3.x+.
RETRO_HW_CONTEXT_OPENGLES2, // GLES 2.0
RETRO_HW_CONTEXT_DUMMY = INT_MAX
};
struct retro_hw_render_callback
{
enum retro_hw_context_type context_type; // Which API to use. Set by libretro core.
retro_hw_context_reset_t context_reset; // Set by libretro core.
retro_hw_get_current_framebuffer_t get_current_framebuffer; // Set by frontend.
retro_hw_get_proc_address_t get_proc_address; // Set by frontend.
bool depth; // Set if render buffers should have depth component attached.
};
// 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.
typedef void (*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_set_eject_state_t)(bool ejected);
// Gets current eject state. The initial state is 'not ejected'.
typedef bool (*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_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_set_image_index_t)(unsigned index);
// Gets total number of images which are available to use.
typedef unsigned (*retro_get_num_images_t)(void);
//
// 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.
struct retro_game_info;
typedef bool (*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_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;
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