Sahli/16col/imgtxtmode.js

// Generated by CoffeeScript 1.7.1
(function() {
  var __hasProp = {}.hasOwnProperty;

  this.VERSION = '0.01';

  ({
    constructor: function(options) {
      var k, v, _results;
      this.screen = [];
      this.palette = new ImageTextModePaletteVGA();
      this.font = new ImageTextModeFont8x16();
      _results = [];
      for (k in options) {
        if (!__hasProp.call(options, k)) continue;
        v = options[k];
        _results.push(this[k] = v);
      }
      return _results;
    },
    parseUrl: function(url) {
      var content, req;
      req = new XMLHttpRequest();
      req.open('GET', url, false);
      req.overrideMimeType('text/plain; charset=x-user-defined');
      req.send(null);
      content = req.status === 200 || req.status === 0 ? req.responseText : '';
      return this.parse(content);
    },
    unpackShort: function(data) {
      var shrt;
      shrt = (this.getByteAt(data, 1) << 8) + this.getByteAt(data, 0);
      if (shrt < 0) {
        shrt += 65536;
      }
      return shrt;
    },
    unpackLong: function(data) {
      var lng;
      lng = (((this.getByteAt(data, 0) << 8) + this.getByteAt(data, 1) << 8) + this.getByteAt(data, 2) << 8) + this.getByteAt(data, 3);
      if (lng < 0) {
        lng += 4294967296;
      }
      return lng;
    },
    getByteAt: function(data, offset) {
      return data.charCodeAt(offset) & 0xFF;
    },
    getHeight: function() {
      return this.screen.length;
    },
    parsePaletteData: function(data) {
      var b, colors, g, i, r, _i;
      colors = [];
      for (i = _i = 0; _i <= 45; i = _i += 3) {
        r = this.getByteAt(data, i);
        r = r << 2 | r >> 4;
        g = this.getByteAt(data, i + 1);
        g = g << 2 | g >> 4;
        b = this.getByteAt(data, i + 2);
        b = b << 2 | b >> 4;
        colors.push([r, g, b]);
      }
      return this.palette = new ImageTextModePalette({
        colors: colors
      });
    },
    parseFontData: function(data, height) {
      var chars, chr, i, j, _i, _j, _ref;
      if (height == null) {
        height = 16;
      }
      chars = [];
      for (i = _i = 0, _ref = data.length / height; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
        chr = [];
        for (j = _j = 0; 0 <= height ? _j < height : _j > height; j = 0 <= height ? ++_j : --_j) {
          chr.push(this.getByteAt(data, i * height + j));
        }
        chars.push(chr);
      }
      return this.font = new ImageTextModeFont({
        chars: chars,
        height: height
      });
    },
    renderCanvas: function(canvasElem) {
      var bg, canvas, chr, ctx, curfillstyle, cx, cy, fg, h, i, j, line, pixel, px, py, w, _i, _j, _k, _l, _len, _ref, _ref1, _ref2;
      w = this.getWidth() * this.font.width;
      h = this.getHeight() * this.font.height;
      canvas = document.createElement('canvas');
      canvas.setAttribute('width', w);
      canvas.setAttribute('height', h);
      ctx = canvas.getContext('2d');
      for (cy = _i = 0, _ref = this.screen.length; 0 <= _ref ? _i < _ref : _i > _ref; cy = 0 <= _ref ? ++_i : --_i) {
        if (this.screen[cy] != null) {
          for (cx = _j = 0, _ref1 = this.screen[cy].length; 0 <= _ref1 ? _j < _ref1 : _j > _ref1; cx = 0 <= _ref1 ? ++_j : --_j) {
            pixel = this.screen[cy][cx];
            curfillstyle = null;
            if (pixel != null) {
              if (pixel.attr != null) {
                fg = pixel.attr & 15;
                bg = (pixel.attr & 240) >> 4;
              } else {
                fg = pixel.fg;
                bg = pixel.bg;
              }
              px = cx * this.font.width;
              py = cy * this.font.height;
              ctx.fillStyle = this.palette.toRgbaString(this.palette.colors[bg]);
              ctx.fillRect(px, py, this.font.width, this.font.height);
              ctx.fillStyle = this.palette.toRgbaString(this.palette.colors[fg]);
              chr = this.font.chars[pixel.ch.charCodeAt(0) & 0xff];
              i = 0;
              for (_k = 0, _len = chr.length; _k < _len; _k++) {
                line = chr[_k];
                for (j = _l = 0, _ref2 = this.font.width; 0 <= _ref2 ? _l < _ref2 : _l > _ref2; j = 0 <= _ref2 ? ++_l : --_l) {
                  if (line & (1 << this.font.width - 1 - j)) {
                    ctx.fillRect(px + j, py + i, 1, 1);
                  }
                }
                i += 1;
              }
            }
          }
        }
      }
      canvasElem.setAttribute('width', w);
      canvasElem.setAttribute('height', h);
      ctx = canvasElem.getContext('2d');
      return ctx.drawImage(canvas, 0, 0);
    },
    toBinaryArray: function(str) {
      var buf, bufView, i, _i, _ref;
      buf = new ArrayBuffer(str.length * 2);
      bufView = new Uint8Array(buf);
      for (i = _i = 0, _ref = str.length; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
        bufView[i] = str.charCodeAt(i);
      }
      return buf;
    }
  });

}).call(this);