寻找 JavaScript 大神， jsnes 这个模拟器为什么在小程序里面不行呢？代码无报错，但是是黑屏的一个状态

[lib360]

JSNES 官网 https://jsnes.org/

var jsnes = require("./nes/index.js");


var sysinfo = wx.getSystemInfoSync();

var SCREEN_WIDTH = 360;
var SCREEN_HEIGHT = 640;

var FRAMEBUFFER_SIZE = SCREEN_WIDTH * SCREEN_HEIGHT;

var canvas_ctx, image;
var framebuffer_u8, framebuffer_u32;


var AUDIO_BUFFERING = 512;
var SAMPLE_COUNT = 4 * 1024;
var SAMPLE_MASK = SAMPLE_COUNT - 1;
var audio_samples_L = new Float32Array(SAMPLE_COUNT);
var audio_samples_R = new Float32Array(SAMPLE_COUNT);
var audio_write_cursor = 0,
  audio_read_cursor = 0;

var nes = null;


/**
 * 游戏主函数
 */
export default class Main {
  constructor() {

    // 维护当前 requestAnimationFrame 的 id
    this.aniId = 0
    this.restart()
  }

  restart() {
    let ctx = canvas.getContext('2d')

    canvas_ctx = ctx;


    image = canvas_ctx.getImageData(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
    canvas_ctx.fillStyle = "black";
    canvas_ctx.fillRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);

    // Allocate framebuffer array.
    var buffer = new ArrayBuffer(image.data.length);
    framebuffer_u8 = new Uint8ClampedArray(buffer);
    framebuffer_u32 = new Uint32Array(buffer);
    
    nes = new jsnes.NES({
      onFrame: function (framebuffer_24) {
        for (var i = 0; i < FRAMEBUFFER_SIZE; i++) framebuffer_u32[i] = 0xFF000000 | framebuffer_24[i];
      }

    });



    this.bindLoop = this.loop.bind(this)

    window.cancelAnimationFrame(this.aniId);

    let that = this;

    this.nes_load_url(() => {
      console.log('load_succ');

      that.aniId = window.requestAnimationFrame(
        that.bindLoop,
        canvas_ctx
      )

      /*
      setTimeout(() => {

        that.keyboard(nes.buttonDown, 13);
        that.keyboard(nes.buttonUp, 13);
        console.log('start');

      }, 1000);
*/


    });
  }

  keyboard(callback, keyCode) {
    var player = 1;
    switch (keyCode) {
      case 38: // UP
        callback(player, jsnes.Controller.BUTTON_UP); break;
      case 40: // Down
        callback(player, jsnes.Controller.BUTTON_DOWN); break;
      case 37: // Left
        callback(player, jsnes.Controller.BUTTON_LEFT); break;
      case 39: // Right
        callback(player, jsnes.Controller.BUTTON_RIGHT); break;
      case 65: // 'a' - qwerty, dvorak
      case 81: // 'q' - azerty
        callback(player, jsnes.Controller.BUTTON_A); break;
      case 83: // 's' - qwerty, azerty
      case 79: // 'o' - dvorak
        callback(player, jsnes.Controller.BUTTON_B); break;
      case 9: // Tab
        callback(player, jsnes.Controller.BUTTON_SELECT); break;
      case 13: // Return
        callback(player, jsnes.Controller.BUTTON_START); break;
      default: break;
    }
  }


  // 实现游戏帧循环
  loop() {
    
    this.aniId = window.requestAnimationFrame(
      this.bindLoop,
      canvas_ctx
    )
 
    //ctx.clearRect(0, 0, canvas.width, canvas.height)

    image.data.set(framebuffer_u8);
    console.log(image);
    canvas_ctx.putImageData(image, 0, 0);
    nes.frame();




  }





  nes_load_data(rom_data, callback) {

    nes.loadROM(rom_data);

    callback && callback();
  }

  nes_load_url(callback) {
    let that = this;

    var url = 'https://localhost/test/InterglacticTransmissing.nes';

    wx.request({
      url: url,
      data: 'ArrayBuffer',
      dataType:"text",
      header: {
        //'content-type': 'text/plain; charset=x-user-defined' // 默认值
      },
      success: function (res) {
        that.nes_load_data(res.data, callback);
      }
    })



  }




}

[azh7138m]

编码问题，默认情况下返回值的 text 是按照 utf8 来做 decode 的。jsnes 目前的设计，在小程序里面需要拿 arrayBuffer ，用 Uint8Array 转换成 string ，就可以了。