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#define GL_SILENCE_DEPRECATION
#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <math.h>
#include <string.h>
#include <immintrin.h>
#define BUFFER_WIDTH 256
#define BUFFER_HEIGHT 240
#define WINDOW_WIDTH 320 * 3
#define WINDOW_HEIGHT 240 * 3
#define LIKELY(x) __builtin_expect(!!(x), 1)
#define UNLIKELY(x) __builtin_expect(!!(x), 0)
#ifndef restrict
# if defined(__cplusplus)
# define restrict __restrict
# endif
#endif
struct main_state {
int32_t filter_override;
float filter_frequency;
uint32_t screen_width;
uint32_t screen_height;
uint32_t texture;
uint32_t render_width;
uint32_t render_height;
uint32_t shader_program;
float contrast;
float saturation;
float brightness;
float tone_data[4];
int32_t uniform_resolution;
int32_t uniform_src_image_size;
int32_t uniform_brightness;
int32_t uniform_tone;
int32_t uniform_crt_emulation;
int32_t uniform_sampler_location;
uint32_t vao;
uint32_t vbo;
uint32_t ebo;
struct {
int32_t x;
int32_t y;
int32_t w;
int32_t h;
} viewport;
uint8_t fullscreen;
uint8_t toggle_crt_emulation;
};
struct main_state state;
uint32_t buffer[BUFFER_WIDTH * BUFFER_HEIGHT] __attribute__((section(".bss"), aligned(4096)));
uint32_t display_buffer[BUFFER_WIDTH * BUFFER_HEIGHT] __attribute__((section(".bss"), aligned(4096)));
void audio_callback(int16_t *data, size_t frames) {
}
#define FRAME_INTERVAL_NS (1000000000ULL / 60.0988)
static GLFWwindow *window;
#define DEBUG_PRINT printf
#include "timer.c"
#include "audio.c"
#include "opengl_loader.c"
#include "opengl.c"
#include "render.c"
#include "callbacks.c"
// NES core
#include "mapper.h"
#include "mknes.h"
// #include "apu.c"
#include "ppu.c"
#include "memory.c"
#include "cpu.c"
#include "ines2.c"
#include "mapper.c"
struct nes_state nstate;
static uint32_t frames;
int main(int argc, char **argv) {
#ifdef _WIN32
timeBeginPeriod(1);
#endif
state.toggle_crt_emulation = 1;
setbuf(stdout, 0);
init_opcode_lut();
init_opcode_ud_lut();
// protect_opcode_lut();
ppu_reset(&nstate);
// ines2_load(&nstate, "data/nrom/10-Yard Fight (USA, Europe).nes");
// ines2_load(&nstate, "data/nrom/Balloon Fight (USA).nes");
// ines2_load(&nstate, "data/nrom/Excitebike (Japan, USA).nes");
// ines2_load(&nstate, "data/nrom/Ice Climber (USA, Europe, Korea).nes");
// ines2_load(&nstate, "data/nrom/Kung Fu (Japan, USA).nes");
ines2_load(&nstate, "data/nrom/Super Mario Bros. (World) (HVC-SM).nes");
// ines2_load(&nstate, "data/nrom/Urban Champion (World).nes");
// ines2_load(&nstate, "data/nrom/Wrecking Crew (World).nes");
// ines2_load(&nstate, "data/nrom/scanline.nes");
// ines2_load(&nstate, "data/nrom/Sayoonara!.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterChromaLuma.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest1.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest2.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest3.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest3a.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest3b.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest3c.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest3d.NES");
// ines2_load(&nstate, "data/nrom/raster_demos/RasterTest3e.NES");
// ines2_load(&nstate, "data/nrom/NEStress.NES");
// ines2_load(&nstate, "data/tv.nes");
// ines2_load(&nstate, "data/Super Mario Bros. (World) (HVC-SM).zip");
// ines2_load(&nstate, "data/Super Mario Bros. + Duck Hunt (USA).zip");
mapper_setup(&nstate);
uint32_t lo = nstate.mapper.prg_read(&nstate, 0xfffc);
uint32_t hi = nstate.mapper.prg_read(&nstate, 0xfffd);
nstate.cpu.pc = (hi << 8) | lo;
struct timer_handle *timer = timer_new(FRAME_INTERVAL_NS);
if(!timer) {
fprintf(stderr, "Failed to create timer\n");
return 1;
}
if(glfwInit()) {
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_COMPAT_PROFILE);
window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "NES Emulator", 0, 0);
if(window) {
glfwSetWindowAspectRatio(window, 320, 240);
glfwSetWindowSizeLimits(window, 320*3, 240*3, GLFW_DONT_CARE, GLFW_DONT_CARE);
glfwMakeContextCurrent(window);
opengl_setup();
glfwSetKeyCallback(window, key_callback);
glfwSetFramebufferSizeCallback(window, framebuffer_callback);
glfwSwapInterval(0);
framebuffer_callback(window, WINDOW_WIDTH, WINDOW_HEIGHT);
for(int jid = GLFW_JOYSTICK_1; jid <= GLFW_JOYSTICK_LAST; jid++) {
if(glfwJoystickPresent(jid)) {
const char *name = glfwGetJoystickName(jid);
printf("Joystick %d detected: %s\n", jid, name);
break;
}
}
set_decay(40);
timer_start(timer);
while(!glfwWindowShouldClose(window)) {
timer_wait(timer);
glfwPollEvents();
// //
while(!nstate.ppu.frame_ready) {
// PROFILE_NAMED("nes emulator");
cpu_tick(&nstate);
}
nstate.ppu.frame_ready = 0;
frames++;
uint32_t * restrict dst = buffer;
uint8_t * restrict src = nstate.ppu.pixels;
for(uint32_t y = 0; y < 240; ++y) {
for(uint32_t x = 0; x < 256; ++x) {
uint8_t val = *src++;
if(val >= 64) val = 0;
dst[x] = nes_palette[val];
}
dst += BUFFER_WIDTH;
}
apply_phosphor_decay();
render_frame();
glfwSwapBuffers(window);
}
printf("total frames: %6.6d total cycles: %ld\n", frames, nstate.cycles);
glfwDestroyWindow(window);
} else {
fprintf(stderr, "Failed to create window\n");
}
glfwTerminate();
} else {
fprintf(stderr, "Failed to initialize GLFW\n");
}
timer_destroy(timer);
#ifdef _WIN32
timeEndPeriod(1);
#endif
return 0;
}
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