// Generated by CoffeeScript 1.7.1
(function() {
  var __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

  this.ImageTextModeIDF = (function(_super) {
    __extends(ImageTextModeIDF, _super);

    function ImageTextModeIDF(options) {
      var k, v;
      ImageTextModeIDF.__super__.constructor.apply(this, arguments);
      this.header = {
        x0: 0,
        x1: 0,
        y0: 0,
        y1: 0
      };
      for (k in options) {
        if (!__hasProp.call(options, k)) continue;
        v = options[k];
        this[k] = v;
      }
    }

    ImageTextModeIDF.prototype.parse = function(content) {
      var attr, buffer, ch, eodata, headerData, i, info, len, offset, x, y, _i;
      headerData = content.substr(0, 12);
      if (headerData.length !== 12 || !headerData.match('^\x041.4')) {
        throw new Error('File is not an IDF');
      }
      this.header.x0 = this.unpackShort(headerData.substr(4, 2));
      this.header.y0 = this.unpackShort(headerData.substr(6, 2));
      this.header.x1 = this.unpackShort(headerData.substr(8, 2));
      this.header.y1 = this.unpackShort(headerData.substr(10, 2));
      eodata = content.length - 48 - 4096;
      if (content.substr(content.length - 128, 5) === 'SAUCE') {
        eodata -= 128;
      }
      this.parseFontData(content.substr(eodata, 4096));
      this.parsePaletteData(content.substr(eodata + 4096, 48));
      y = 0;
      x = 0;
      this.screen[y] = [];
      offset = 12;
      while (offset < eodata) {
        buffer = content.substr(offset, 2);
        info = this.unpackShort(buffer);
        offset += 2;
        len = 1;
        if (info === 1) {
          len = this.unpackShort(content.substr(offset, 2)) & 255;
          offset += 2;
          buffer = content.substr(offset, 2);
          offset += 2;
        }
        ch = buffer.substr(0, 1);
        attr = this.getByteAt(buffer, 1);
        for (i = _i = 1; 1 <= len ? _i <= len : _i >= len; i = 1 <= len ? ++_i : --_i) {
          this.screen[y][x] = {
            'ch': ch,
            'attr': attr
          };
          x++;
          if (x > this.header.x1) {
            x = 0;
            y++;
            this.screen[y] = [];
          }
        }
      }
      if (this.screen[y].length === 0) {
        return this.screen.pop();
      }
    };

    return ImageTextModeIDF;

  })(this.ImageTextMode);

}).call(this);