main.js

let c = el("output");
c.width = 512;
c.height = 480;
let ctx = c.getContext("2d");
let imgData = ctx.getImageData(0, 0, 512, 480);

let loopId = 0;
let loaded = false;
let paused = false;
let pausedInBg = false;

let romArr = new Uint8Array([]);

let snes = new Snes();

let audioHandler = new AudioHandler();

let logging = false;
let noPpu = false;


let controlsP1 = {
  z: 0, // B
  a: 1, // Y
  shift: 2, // select
  enter: 3, // start
  arrowup: 4, // up
  arrowdown: 5, // down
  arrowleft: 6, // left
  arrowright: 7, // right
  x: 8, // A
  s: 9, // X
  d: 10, // L
  c: 11 // R
}

// Função para carregar o ROM a partir de um ArrayBuffer
function loadRomFromArrayBuffer(buffer) {
  let romArr = new Uint8Array(buffer);
  loadRom(romArr); // Supondo que loadRom seja uma função definida em outro lugar
}

// Carrega o arquivo main.smc diretamente
fetch('./main.smc').then(response => {
  if (response.ok) {
    response.arrayBuffer().then(buffer => {
      loadRomFromArrayBuffer(buffer);
    });
  } else {
    console.error('Não foi possível carregar o arquivo main.smc');
  }
}).catch(error => {
  console.error('Erro ao buscar o arquivo main.smc:', error);
});


el("pause").onclick = function() {
  if(paused && loaded) {
    loopId = requestAnimationFrame(update);
    audioHandler.start();
    paused = false;
    el("pause").textContent = "Pause";
  } else {
    cancelAnimationFrame(loopId);
    audioHandler.stop();
    paused = true;
    el("pause").textContent = "Continue";
  }
}

el("reset").onclick = function(e) {
  snes.reset(false);
}

el("hardreset").onclick = function(e) {
  snes.reset(true);
}

el("runframe").onclick = function(e) {
  if(loaded) {
    runFrame();
  }
}

el("ishirom").onchange = function(e) {
  if(loaded) {
    // reload when switching from LoROM to HiROM
    loadRom(romArr);
  }
}

document.onvisibilitychange = function(e) {
  if(document.hidden) {
    pausedInBg = false;
    if(!paused && loaded) {
      el("pause").click();
      pausedInBg = true;
    }
  } else {
    if(pausedInBg && loaded) {
      el("pause").click();
      pausedInBg = false;
    }
  }
}

function loadRom(rom) {
  let hiRom = el("ishirom").checked;;
  if(snes.loadRom(rom, hiRom)) {
    snes.reset(true);
    if(!loaded && !paused) {
      loopId = requestAnimationFrame(update);
      audioHandler.start();
    }
    loaded = true;
  }
}

function runFrame() {

  if(logging) {
    do {
      snes.cycle();
      // TODO: some way of tracing the spc again

      // if((snes.xPos % 20) === 0 && snes.apu.spc.cyclesLeft === 0) {
      //   log(getSpcTrace(
      //     snes.apu.spc, snes.apu.cycles
      //   ));
      // }
    } while(
      snes.cpuCyclesLeft > 0 ||
      (snes.xPos >= 536 && snes.xPos < 576) ||
      snes.hdmaTimer > 0
    );
    log(getTrace(
      snes.cpu, snes.frames * 1364 * 262 + snes.yPos * 1364 + snes.xPos
    ));
  } else {
    snes.runFrame(noPpu);
  }

  snes.setPixels(imgData.data);
  ctx.putImageData(imgData, 0, 0);
  snes.setSamples(audioHandler.sampleBufferL, audioHandler.sampleBufferR, audioHandler.samplesPerFrame);
  audioHandler.nextBuffer();
}

function update() {
  runFrame();
  loopId = requestAnimationFrame(update);
}

window.onkeydown = function(e) {
  switch(e.key) {
    case "l":
    case "L": {
      logging = !logging;
      break;
    }
    case "p":
    case "P": {
      noPpu = !noPpu;
      break;
    }
  }
  if(controlsP1[e.key.toLowerCase()] !== undefined) {
    e.preventDefault();
    snes.setPad1ButtonPressed(controlsP1[e.key.toLowerCase()]);
  }
}

window.onkeyup = function(e) {
  if(controlsP1[e.key.toLowerCase()] !== undefined) {
    e.preventDefault();
    snes.setPad1ButtonReleased(controlsP1[e.key.toLowerCase()]);
  }
}

function log(text) {
  el("log").innerHTML += text + "\n";
  el("log").scrollTop = el("log").scrollHeight;
}

function getByteRep(val) {
  return ("0" + val.toString(16)).slice(-2).toUpperCase();
}

function getWordRep(val) {
  return ("000" + val.toString(16)).slice(-4).toUpperCase();
}

function getLongRep(val) {
  return ("00000" + val.toString(16)).slice(-6).toUpperCase();
}

function clearArray(arr) {
  for(let i = 0; i < arr.length; i++) {
    arr[i] = 0;
  }
}

function el(id) {
  return document.getElementById(id);
}