minecraft-pi-reborn/mods/src/benchmark/benchmark.cpp
2021-11-13 23:29:48 -05:00

148 lines
4.7 KiB
C++

#include <ctime>
#include <libreborn/libreborn.h>
#include <symbols/minecraft.h>
#include <media-layer/core.h>
#include <SDL/SDL.h>
#include "../init/init.h"
#include "../compat/compat.h"
#include "../misc/misc.h"
// --benchmark: Activate Benchmark
static bool active = false;
__attribute__((constructor)) static void _init_active(int argc, char *argv[]) {
// Iterate Arguments
for (int i = 1; i < argc; i++) {
// Check Argument
if (strcmp(argv[i], "--benchmark") == 0) {
// Enabled
active = true;
break;
}
}
}
// Constants
#define NANOSECONDS_IN_SECOND 1000000000ll
// Config
#define BENCHMARK_GAME_MODE 1 // Creative Mode
#define BENCHMARK_SEED 2048 // Random Number
#define BENCHMARK_WORLD_NAME "_Benchmark" // Random Number
#define BENCHMARK_LENGTH (180ll * NANOSECONDS_IN_SECOND) // 3 Minutes
#define BENCHMARK_ROTATION_INTERVAL ((long long int) (0.02f * NANOSECONDS_IN_SECOND))
#define BENCHMARK_ROTATION_AMOUNT 10
// Create/Start World
static void start_world(unsigned char *minecraft) {
// Log
INFO("%s", "Loading Benchmark");
// Specify Level Settings
LevelSettings settings;
settings.game_type = BENCHMARK_GAME_MODE;
settings.seed = BENCHMARK_SEED;
// Delete World If It Already Exists
unsigned char *level_source = (*Minecraft_getLevelSource)(minecraft);
unsigned char *level_source_vtable = *(unsigned char **) level_source;
ExternalFileLevelStorageSource_deleteLevel_t ExternalFileLevelStorageSource_deleteLevel = *(ExternalFileLevelStorageSource_deleteLevel_t *) (level_source_vtable + ExternalFileLevelStorageSource_deleteLevel_vtable_offset);
(*ExternalFileLevelStorageSource_deleteLevel)(level_source, BENCHMARK_WORLD_NAME);
// Select Level
(*Minecraft_selectLevel)(minecraft, BENCHMARK_WORLD_NAME, BENCHMARK_WORLD_NAME, settings);
// Open ProgressScreen
void *screen = ::operator new(PROGRESS_SCREEN_SIZE);
ALLOC_CHECK(screen);
screen = (*ProgressScreen)((unsigned char *) screen);
(*Minecraft_setScreen)(minecraft, (unsigned char *) screen);
}
// Track Frames
static unsigned long long int frames = 0;
HOOK(media_swap_buffers, void, ()) {
ensure_media_swap_buffers();
(*real_media_swap_buffers)();
frames++;
}
// Get Time
static long long int get_time() {
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
long long int a = (long long int) ts.tv_nsec;
long long int b = ((long long int) ts.tv_sec) * NANOSECONDS_IN_SECOND;
return a + b;
}
// Store Time When World Loaded
static int world_loaded = 0;
static long long int world_loaded_time;
static unsigned long long int world_loaded_frames;
// Runs Every Tick
static bool loaded = false;
static bool exit_requested = false;
static void Minecraft_update_injection(unsigned char *minecraft) {
// Create/Start World
if (!loaded) {
start_world(minecraft);
loaded = true;
}
// Detect World Loaded
if (!world_loaded && (*Minecraft_isLevelGenerated)(minecraft)) {
world_loaded = 1;
world_loaded_time = get_time();
world_loaded_frames = frames;
}
// Run Benchmark
if (!exit_requested && world_loaded) {
// Get Time
long long int current_time = get_time() - world_loaded_time;
unsigned long long int current_frames = frames - world_loaded_frames;
// Rotate Player
static long long int rotate_point = BENCHMARK_ROTATION_INTERVAL;
if (current_time >= rotate_point) {
SDL_Event event;
event.type = SDL_MOUSEMOTION;
event.motion.x = 0;
event.motion.y = 0;
event.motion.xrel = BENCHMARK_ROTATION_AMOUNT;
event.motion.yrel = 0;
SDL_PushEvent(&event);
// Reset Rotation Timer
rotate_point += BENCHMARK_ROTATION_INTERVAL;
}
// Check If Benchmark Is Over
if (current_time >= BENCHMARK_LENGTH) {
// Request Exit
compat_request_exit();
// Disable Special Behavior After Requesting Exit
exit_requested = true;
// Calculate FPS
static double frames_per_nanosecond = ((double) current_frames) / ((double) current_time);
static double frames_per_second = frames_per_nanosecond * NANOSECONDS_IN_SECOND;
INFO("Benchmark Completed After %llu Frames In %lld Nanoseconds, Average FPS: %f", current_frames, current_time, frames_per_second);
}
}
}
// Init Benchmark
void init_benchmark() {
if (active) {
misc_run_on_update(Minecraft_update_injection);
// Disable Interaction
media_set_interactable(0);
// Disable V-Sync
media_disable_vsync();
}
}