--- /dev/null
+/*
+ * 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();
+}
--- /dev/null
+/* 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
notaz.gp2x.de / picodrive.git / commitdiff