forked from libretro/libretro-2048
/
libretro.c
310 lines (249 loc) · 6.38 KB
/
libretro.c
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#include "game.h"
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
retro_log_printf_t log_cb;
retro_video_refresh_t video_cb;
#if 0
static retro_audio_sample_t audio_cb;
static retro_audio_sample_batch_t audio_batch_cb;
#endif
retro_environment_t environ_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
float frame_time = 0;
static void fallback_log(enum retro_log_level level, const char *fmt, ...)
{
va_list va;
(void)level;
va_start(va, fmt);
vfprintf(stderr, fmt, va);
va_end(va);
}
void retro_init(void)
{
char *savedir;
game_calculate_pitch();
game_init();
environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &savedir);
if (savedir)
{
FILE *fp;
#ifdef _WIN32
char slash = '\\';
#else
char slash = '/';
#endif
char filename[1024] = {0};
sprintf(filename, "%s%c2048.srm", savedir, slash);
fp = fopen(filename, "rb");
if (fp)
{
fread(game_data(), game_data_size(), 1, fp);
fclose(fp);
}
else
{
if (log_cb)
log_cb(RETRO_LOG_WARN, "[2048] unable to load game data: %s.\n", strerror(errno));
}
}
else
{
if (log_cb)
log_cb(RETRO_LOG_WARN, "[2048] unable to load game data: save directory not set.\n");
}
}
void retro_deinit(void)
{
char *savedir;
environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &savedir);
if (savedir)
{
FILE *fp;
#ifdef _WIN32
char slash = '\\';
#else
char slash = '/';
#endif
char filename[1024] = {0};
sprintf(filename, "%s%c2048.srm", savedir, slash);
fp = fopen(filename, "wb");
if (fp)
{
fwrite(game_save_data(), game_data_size(), 1, fp);
fclose(fp);
}
else
{
if (log_cb)
log_cb(RETRO_LOG_WARN, "[2048] unable to save game data: %s.\n", strerror(errno));
}
}
else
{
if (log_cb)
log_cb(RETRO_LOG_WARN, "[2048] unable to save game data: save directory not set.\n");
}
game_deinit();
}
unsigned retro_api_version(void)
{
return RETRO_API_VERSION;
}
void retro_set_controller_port_device(unsigned port, unsigned device)
{
(void)port;
(void)device;
}
void retro_get_system_info(struct retro_system_info *info)
{
memset(info, 0, sizeof(*info));
info->library_name = "2048";
info->library_version = "v1.0";
info->need_fullpath = false;
info->valid_extensions = NULL; /* Anything is fine, we don't care. */
}
void retro_get_system_av_info(struct retro_system_av_info *info)
{
info->timing.fps = 60.0;
info->timing.sample_rate = 30000.0;
info->geometry.base_width = SCREEN_WIDTH;
info->geometry.base_height = SCREEN_HEIGHT;
info->geometry.max_width = SCREEN_WIDTH;
info->geometry.max_height = SCREEN_HEIGHT;
info->geometry.aspect_ratio = 1;
}
void retro_set_environment(retro_environment_t cb)
{
struct retro_log_callback logging;
bool no_rom = true;
environ_cb = cb;
cb(RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME, &no_rom);
if (cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &logging))
log_cb = logging.log;
else
log_cb = fallback_log;
}
void retro_set_audio_sample(retro_audio_sample_t cb)
{
#if 0
audio_cb = cb;
#endif
}
void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb)
{
#if 0
audio_batch_cb = cb;
#endif
}
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;
}
void retro_set_video_refresh(retro_video_refresh_t cb)
{
video_cb = cb;
}
void retro_reset(void)
{
game_reset();
}
static void frame_time_cb(retro_usec_t usec)
{
frame_time = usec / 1000000.0;
}
void retro_run(void)
{
key_state_t ks;
input_poll_cb();
ks.up = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP);
ks.right = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT);
ks.down = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN);
ks.left = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT);
ks.start = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START);
ks.select = input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT);
game_update(frame_time, &ks);
game_render();
}
bool retro_load_game(const struct retro_game_info *info)
{
struct retro_frame_time_callback frame_cb;
struct retro_input_descriptor desc[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Pause" },
{ 0 },
};
environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
if (!game_init_pixelformat())
return false;
frame_cb.callback = frame_time_cb;
frame_cb.reference = 1000000 / 60;
frame_cb.callback(frame_cb.reference);
environ_cb(RETRO_ENVIRONMENT_SET_FRAME_TIME_CALLBACK, &frame_cb);
(void)info;
return true;
}
void retro_unload_game(void)
{
}
unsigned retro_get_region(void)
{
return RETRO_REGION_NTSC;
}
bool retro_load_game_special(unsigned type, const struct retro_game_info *info, size_t num)
{
(void)type;
(void)info;
(void)num;
return false;
}
size_t retro_serialize_size(void)
{
return game_data_size();
}
bool retro_serialize(void *data_, size_t size)
{
if (size < game_data_size())
return false;
memcpy(data_, game_data(), game_data_size());
return true;
}
bool retro_unserialize(const void *data_, size_t size)
{
if (size < game_data_size())
return false;
memcpy(game_data(), data_, game_data_size());
return true;
}
void *retro_get_memory_data(unsigned id)
{
if (id != RETRO_MEMORY_SAVE_RAM)
return NULL;
return game_data();
}
size_t retro_get_memory_size(unsigned id)
{
if (id != RETRO_MEMORY_SAVE_RAM)
return 0;
return game_data_size();
}
void retro_cheat_reset(void)
{}
void retro_cheat_set(unsigned index, bool enabled, const char *code)
{
(void)index;
(void)enabled;
(void)code;
}