77 lines
2.3 KiB
Zig
77 lines
2.3 KiB
Zig
const std = @import("std");
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const emu = @import("emu.zig");
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const Display = @import("display.zig").Display;
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const c = @cImport(@cInclude("SDL.h"));
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const Cpu = emu.Cpu;
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const WIDTH = 64;
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const HEIGHT = 32;
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const WINDOW_WIDTH = WIDTH * 10;
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const WINDOW_HEIGHT = HEIGHT * 10;
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const PIXELBUF_LEN = WIDTH * HEIGHT * @sizeOf(u32);
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pub fn main() !void {
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_ = c.SDL_Init(c.SDL_INIT_VIDEO);
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defer c.SDL_Quit();
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const window = c.SDL_CreateWindow("CHIP-8", c.SDL_WINDOWPOS_CENTERED, c.SDL_WINDOWPOS_CENTERED, WINDOW_WIDTH, WINDOW_HEIGHT, c.SDL_WINDOW_OPENGL);
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defer c.SDL_DestroyWindow(window);
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const renderer = c.SDL_CreateRenderer(window, -1, c.SDL_RENDERER_ACCELERATED);
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defer c.SDL_DestroyRenderer(renderer);
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const texture = c.SDL_CreateTexture(renderer, c.SDL_PIXELFORMAT_RGBA8888, c.SDL_TEXTUREACCESS_STATIC, WIDTH, HEIGHT);
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defer c.SDL_DestroyTexture(texture);
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var zig8 = emu.Cpu {
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.i = 0x00,
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.pc = 0x200,
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.sp = 0x00,
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.v = [_]u8{0x00} ** 16,
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.stack = [_]u16{0x00} ** 16,
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.memory = [_]u8{0x0000} ** 0x1000,
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.disp = Display.new(),
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};
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try emu.load_rom_path(&zig8, "./bin/IBM Logo.ch8");
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var pixel_buf: [PIXELBUF_LEN]u8 = [_]u8 {0x00} ** PIXELBUF_LEN;
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emuloop: while(true) {
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_ = c.SDL_UpdateTexture(texture, null, @ptrCast(*const c_void, &pixel_buf), WIDTH * @sizeOf(u32));
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_ = c.SDL_RenderCopy(renderer, texture, null, null);
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_ = c.SDL_RenderPresent(renderer);
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var event: c.SDL_Event = undefined;
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while(c.SDL_PollEvent(&event) != 0) {
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switch(event.type) {
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c.SDL_QUIT => break :emuloop,
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else => {}
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}
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}
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emu.step(&zig8);
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draw(&zig8.disp, &pixel_buf);
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}
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}
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fn draw(display: *const Display, pixel_buf: *[8192]u8) void {
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var emu_i: usize = 0;
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while (emu_i < display.buf.len) : (emu_i += 1) {
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var pixel_i = emu_i * 4;
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if (display.buf[emu_i] == 0x01) {
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pixel_buf[pixel_i] = 0xFF;
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pixel_buf[pixel_i + 1] = 0xFF;
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pixel_buf[pixel_i + 2] = 0xFF;
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pixel_buf[pixel_i + 3] = 0xFF;
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} else {
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pixel_buf[pixel_i] = 0xFF;
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pixel_buf[pixel_i + 1] = 0x00;
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pixel_buf[pixel_i + 2] = 0x00;
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pixel_buf[pixel_i + 3] = 0x00;
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}
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}
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} |