device_home/node_modules/pngjs/lib/filter-parse-async.js

   1 'use strict';
   2
   3 var util = require('util');
   4 var ChunkStream = require('./chunkstream');
   5 var Filter = require('./filter-parse');
   6
   7
   8 var FilterAsync = module.exports = function(bitmapInfo) {
   9   ChunkStream.call(this);
  10
  11   var buffers = [];
  12   var that = this;
  13   this._filter = new Filter(bitmapInfo, {
  14     read: this.read.bind(this),
  15     write: function(buffer) {
  16       buffers.push(buffer);
  17     },
  18     complete: function() {
  19       that.emit('complete', Buffer.concat(buffers));
  20     }
  21   });
  22
  23   this._filter.start();
  24 };
  25 util.inherits(FilterAsync, ChunkStream);