# Code coverage report for lib\parser-sync.js

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All files » lib/ » parser-sync.js

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     // Copyright (c) 2012 Kuba Niegowski
    //
    // Permission is hereby granted, free of charge, to any person obtaining a copy
    // of this software and associated documentation files (the "Software"), to deal
    // in the Software without restriction, including without limitation the rights
    // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    // copies of the Software, and to permit persons to whom the Software is
    // furnished to do so, subject to the following conditions:
    //
    // The above copyright notice and this permission notice shall be included in
    // all copies or substantial portions of the Software.
    //
    // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    // THE SOFTWARE.

    'use strict';

    var zlib = require('zlib'),
        SyncReader = require('./sync-reader'),
        FilterSync = require('./filter-sync'),
        Parser = require('./parser'),
      bitmapper = require('./bitmapper');

    var ParserSync = module.exports = function(buffer, options) {

        var reader = new SyncReader(buffer);

        this._inflateDataList = [];
        this._parser = new Parser(options, {
            read: reader.read.bind(reader),
            error: this._handleError.bind(this),
            metadata: this._metaData.bind(this),
            gamma: this._gamma.bind(this),
            finished: function() {},
            inflateData: this._inflateData.bind(this),
            createData: this._createData.bind(this)
        });
        this._options = options;

        this._parser.start();
        reader.process();

        //join together the inflate datas
        var inflateData = Buffer.concat(this._inflateDataList);

        var data = zlib.inflateSync(inflateData);

        data = FilterSync.process(
          data,
          this._width, this._height,
          this._bpp,
          this._depth,
          this._interlace,
          this._options
        );

        this._data = bitmapper.dataToBitMap(data, this._width, this._height,
          this._bpp,
          this._depth,
          this._interlace);
        // todo yuck
        this.data = this._parser.reverseFiltered(this._data, this._depth, this._width, this._height);
    };

    ParserSync.prototype._handleError = function(err) {
        this.err = err;
    };

    ParserSync.prototype._metaData = function(metaData) {
        this.metaData = metaData;
    };

    ParserSync.prototype._gamma = function(gamma) {
        this.gamma = gamma;
    };

    ParserSync.prototype._inflateData = function(data) {
        this._inflateDataList.push(data);
    };

    ParserSync.prototype._createData = function(width, height, bpp, depth, interlace) {
        this._data = new Buffer(width * height * 4);
        this._bpp = bpp;
        this._width = width;
        this._height = height;
        this._depth = depth;
        this._interlace = interlace;
        return this._data;
    };