first commit

build/node_modules/jpeg-js/.npmignore

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+*.swp
+.DS_Store
+node_modules/
+npm-debug.log
+.idea*

build/node_modules/jpeg-js/.travis.yml

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+language: node_js
+node_js:
+  - "0.8"
+  - "0.10"
+  - "0.12"
+  - "4"
+  - "6"

build/node_modules/jpeg-js/LICENSE

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+Copyright (c) 2014, Eugene Ware
+All rights reserved.
+  
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:  
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.  
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.  
+3. Neither the name of Eugene Ware nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.  
+  
+THIS SOFTWARE IS PROVIDED BY EUGENE WARE ''AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL EUGENE WARE BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

build/node_modules/jpeg-js/README.md

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+# jpeg-js
+
+A pure javascript JPEG encoder and decoder for node.js
+
+[![build status](https://secure.travis-ci.org/eugeneware/jpeg-js.png)](http://travis-ci.org/eugeneware/jpeg-js)
+
+## Installation
+
+This module is installed via npm:
+
+``` bash
+$ npm install jpeg-js
+```
+
+## Example Usage
+
+### Decoding JPEGs
+
+Will decode a buffer or typed array into a `Buffer`;
+
+``` js
+var jpeg = require('jpeg-js');
+var jpegData = fs.readFileSync('grumpycat.jpg');
+var rawImageData = jpeg.decode(jpegData);
+console.log(jpegData.data);
+/*
+{ width: 320,
+  height: 180,
+  data: <Buffer 5b 40 29 ff 59 3e 29 ff 54 3c 26 ff 55 3a 27 ff 5a 3e 2f ff 5c 3c 31 ff 58 35 2d ff 5b 36 2f ff 55 35 32 ff 5a 3a 37 ff 54 36 32 ff 4b 32 2c ff 4b 36 ... > }
+*/
+```
+
+To decode directly into a `Uint8Array`, pass `true` as the second argument to
+`decode`:
+
+``` js
+var jpeg = require('jpeg-js');
+var jpegData = fs.readFileSync('grumpycat.jpg');
+var rawImageData = jpeg.decode(jpegData, true); // return as Uint8Array
+console.log(jpegData.data);
+/*
+{ width: 320,
+  height: 180,
+  data: { '0': 91, '1': 64, ... } } // typed array
+*/
+```
+
+### Encoding JPEGs
+
+``` js
+var jpeg = require('jpeg-js');
+var width = 320, height = 180;
+var frameData = new Buffer(width * height * 4);
+var i = 0;
+while (i < frameData.length) {
+  frameData[i++] = 0xFF; // red
+  frameData[i++] = 0x00; // green
+  frameData[i++] = 0x00; // blue
+  frameData[i++] = 0xFF; // alpha - ignored in JPEGs
+}
+var rawImageData = {
+  data: frameData,
+  width: width,
+  height: height
+};
+var jpegImageData = jpeg.encode(rawImageData, 50);
+console.log(jpegImageData);
+/*
+<Buffer 5b 40 29 ff 59 3e 29 ff 54 3c 26 ff 55 3a 27 ff 5a 3e 2f ff 5c 3c 31 ff 58 35 2d ff 5b 36 2f ff 55 35 32 ff 5a 3a 37 ff 54 36 32 ff 4b 32 2c ff 4b 36 ... >
+*/
+```
+
+## License
+
+### Decoding
+
+This library builds on the work of two other JPEG javascript libraries,
+namely [jpgjs](https://github.com/notmasteryet/jpgjs) for the decoding
+which is licensed under the Apache 2.0 License below:
+
+Copyright 2011 notmasteryet
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+[http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0)
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+### Encoding
+
+The encoding is based off a port of the JPEG encoder in [as3corelib](https://code.google.com/p/as3corelib/source/browse/trunk/src/com/adobe/images/JPGEncoder.as).
+
+The port to Javascript was done by by Andreas Ritter, www.bytestrom.eu, 11/2009.
+
+The Adobe License for the encoder is:
+
+**Adobe**
+
+Copyright (c) 2008, Adobe Systems Incorporated
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above copyright notice, 
+  this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the 
+  documentation and/or other materials provided with the distribution.
+
+* Neither the name of Adobe Systems Incorporated nor the names of its 
+  contributors may be used to endorse or promote products derived from 
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

build/node_modules/jpeg-js/index.js

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+var encode = require('./lib/encoder'),
+    decode = require('./lib/decoder');
+
+module.exports = {
+  encode: encode,
+  decode: decode
+};

build/node_modules/jpeg-js/lib/decoder.js

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+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/*
+   Copyright 2011 notmasteryet
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+// - The JPEG specification can be found in the ITU CCITT Recommendation T.81
+//   (www.w3.org/Graphics/JPEG/itu-t81.pdf)
+// - The JFIF specification can be found in the JPEG File Interchange Format
+//   (www.w3.org/Graphics/JPEG/jfif3.pdf)
+// - The Adobe Application-Specific JPEG markers in the Supporting the DCT Filters
+//   in PostScript Level 2, Technical Note #5116
+//   (partners.adobe.com/public/developer/en/ps/sdk/5116.DCT_Filter.pdf)
+
+var JpegImage = (function jpegImage() {
+  "use strict";
+  var dctZigZag = new Int32Array([
+     0,
+     1,  8,
+    16,  9,  2,
+     3, 10, 17, 24,
+    32, 25, 18, 11, 4,
+     5, 12, 19, 26, 33, 40,
+    48, 41, 34, 27, 20, 13,  6,
+     7, 14, 21, 28, 35, 42, 49, 56,
+    57, 50, 43, 36, 29, 22, 15,
+    23, 30, 37, 44, 51, 58,
+    59, 52, 45, 38, 31,
+    39, 46, 53, 60,
+    61, 54, 47,
+    55, 62,
+    63
+  ]);
+
+  var dctCos1  =  4017   // cos(pi/16)
+  var dctSin1  =   799   // sin(pi/16)
+  var dctCos3  =  3406   // cos(3*pi/16)
+  var dctSin3  =  2276   // sin(3*pi/16)
+  var dctCos6  =  1567   // cos(6*pi/16)
+  var dctSin6  =  3784   // sin(6*pi/16)
+  var dctSqrt2 =  5793   // sqrt(2)
+  var dctSqrt1d2 = 2896  // sqrt(2) / 2
+
+  function constructor() {
+  }
+
+  function buildHuffmanTable(codeLengths, values) {
+    var k = 0, code = [], i, j, length = 16;
+    while (length > 0 && !codeLengths[length - 1])
+      length--;
+    code.push({children: [], index: 0});
+    var p = code[0], q;
+    for (i = 0; i < length; i++) {
+      for (j = 0; j < codeLengths[i]; j++) {
+        p = code.pop();
+        p.children[p.index] = values[k];
+        while (p.index > 0) {
+          p = code.pop();
+        }
+        p.index++;
+        code.push(p);
+        while (code.length <= i) {
+          code.push(q = {children: [], index: 0});
+          p.children[p.index] = q.children;
+          p = q;
+        }
+        k++;
+      }
+      if (i + 1 < length) {
+        // p here points to last code
+        code.push(q = {children: [], index: 0});
+        p.children[p.index] = q.children;
+        p = q;
+      }
+    }
+    return code[0].children;
+  }
+
+  function decodeScan(data, offset,
+                      frame, components, resetInterval,
+                      spectralStart, spectralEnd,
+                      successivePrev, successive) {
+    var precision = frame.precision;
+    var samplesPerLine = frame.samplesPerLine;
+    var scanLines = frame.scanLines;
+    var mcusPerLine = frame.mcusPerLine;
+    var progressive = frame.progressive;
+    var maxH = frame.maxH, maxV = frame.maxV;
+
+    var startOffset = offset, bitsData = 0, bitsCount = 0;
+    function readBit() {
+      if (bitsCount > 0) {
+        bitsCount--;
+        return (bitsData >> bitsCount) & 1;
+      }
+      bitsData = data[offset++];
+      if (bitsData == 0xFF) {
+        var nextByte = data[offset++];
+        if (nextByte) {
+          throw "unexpected marker: " + ((bitsData << 8) | nextByte).toString(16);
+        }
+        // unstuff 0
+      }
+      bitsCount = 7;
+      return bitsData >>> 7;
+    }
+    function decodeHuffman(tree) {
+      var node = tree, bit;
+      while ((bit = readBit()) !== null) {
+        node = node[bit];
+        if (typeof node === 'number')
+          return node;
+        if (typeof node !== 'object')
+          throw "invalid huffman sequence";
+      }
+      return null;
+    }
+    function receive(length) {
+      var n = 0;
+      while (length > 0) {
+        var bit = readBit();
+        if (bit === null) return;
+        n = (n << 1) | bit;
+        length--;
+      }
+      return n;
+    }
+    function receiveAndExtend(length) {
+      var n = receive(length);
+      if (n >= 1 << (length - 1))
+        return n;
+      return n + (-1 << length) + 1;
+    }
+    function decodeBaseline(component, zz) {
+      var t = decodeHuffman(component.huffmanTableDC);
+      var diff = t === 0 ? 0 : receiveAndExtend(t);
+      zz[0]= (component.pred += diff);
+      var k = 1;
+      while (k < 64) {
+        var rs = decodeHuffman(component.huffmanTableAC);
+        var s = rs & 15, r = rs >> 4;
+        if (s === 0) {
+          if (r < 15)
+            break;
+          k += 16;
+          continue;
+        }
+        k += r;
+        var z = dctZigZag[k];
+        zz[z] = receiveAndExtend(s);
+        k++;
+      }
+    }
+    function decodeDCFirst(component, zz) {
+      var t = decodeHuffman(component.huffmanTableDC);
+      var diff = t === 0 ? 0 : (receiveAndExtend(t) << successive);
+      zz[0] = (component.pred += diff);
+    }
+    function decodeDCSuccessive(component, zz) {
+      zz[0] |= readBit() << successive;
+    }
+    var eobrun = 0;
+    function decodeACFirst(component, zz) {
+      if (eobrun > 0) {
+        eobrun--;
+        return;
+      }
+      var k = spectralStart, e = spectralEnd;
+      while (k <= e) {
+        var rs = decodeHuffman(component.huffmanTableAC);
+        var s = rs & 15, r = rs >> 4;
+        if (s === 0) {
+          if (r < 15) {
+            eobrun = receive(r) + (1 << r) - 1;
+            break;
+          }
+          k += 16;
+          continue;
+        }
+        k += r;
+        var z = dctZigZag[k];
+        zz[z] = receiveAndExtend(s) * (1 << successive);
+        k++;
+      }
+    }
+    var successiveACState = 0, successiveACNextValue;
+    function decodeACSuccessive(component, zz) {
+      var k = spectralStart, e = spectralEnd, r = 0;
+      while (k <= e) {
+        var z = dctZigZag[k];
+        switch (successiveACState) {
+        case 0: // initial state
+          var rs = decodeHuffman(component.huffmanTableAC);
+          var s = rs & 15, r = rs >> 4;
+          if (s === 0) {
+            if (r < 15) {
+              eobrun = receive(r) + (1 << r);
+              successiveACState = 4;
+            } else {
+              r = 16;
+              successiveACState = 1;
+            }
+          } else {
+            if (s !== 1)
+              throw "invalid ACn encoding";
+            successiveACNextValue = receiveAndExtend(s);
+            successiveACState = r ? 2 : 3;
+          }
+          continue;
+        case 1: // skipping r zero items
+        case 2:
+          if (zz[z])
+            zz[z] += (readBit() << successive);
+          else {
+            r--;
+            if (r === 0)
+              successiveACState = successiveACState == 2 ? 3 : 0;
+          }
+          break;
+        case 3: // set value for a zero item
+          if (zz[z])
+            zz[z] += (readBit() << successive);
+          else {
+            zz[z] = successiveACNextValue << successive;
+            successiveACState = 0;
+          }
+          break;
+        case 4: // eob
+          if (zz[z])
+            zz[z] += (readBit() << successive);
+          break;
+        }
+        k++;
+      }
+      if (successiveACState === 4) {
+        eobrun--;
+        if (eobrun === 0)
+          successiveACState = 0;
+      }
+    }
+    function decodeMcu(component, decode, mcu, row, col) {
+      var mcuRow = (mcu / mcusPerLine) | 0;
+      var mcuCol = mcu % mcusPerLine;
+      var blockRow = mcuRow * component.v + row;
+      var blockCol = mcuCol * component.h + col;
+      decode(component, component.blocks[blockRow][blockCol]);
+    }
+    function decodeBlock(component, decode, mcu) {
+      var blockRow = (mcu / component.blocksPerLine) | 0;
+      var blockCol = mcu % component.blocksPerLine;
+      decode(component, component.blocks[blockRow][blockCol]);
+    }
+
+    var componentsLength = components.length;
+    var component, i, j, k, n;
+    var decodeFn;
+    if (progressive) {
+      if (spectralStart === 0)
+        decodeFn = successivePrev === 0 ? decodeDCFirst : decodeDCSuccessive;
+      else
+        decodeFn = successivePrev === 0 ? decodeACFirst : decodeACSuccessive;
+    } else {
+      decodeFn = decodeBaseline;
+    }
+
+    var mcu = 0, marker;
+    var mcuExpected;
+    if (componentsLength == 1) {
+      mcuExpected = components[0].blocksPerLine * components[0].blocksPerColumn;
+    } else {
+      mcuExpected = mcusPerLine * frame.mcusPerColumn;
+    }
+    if (!resetInterval) resetInterval = mcuExpected;
+
+    var h, v;
+    while (mcu < mcuExpected) {
+      // reset interval stuff
+      for (i = 0; i < componentsLength; i++)
+        components[i].pred = 0;
+      eobrun = 0;
+
+      if (componentsLength == 1) {
+        component = components[0];
+        for (n = 0; n < resetInterval; n++) {
+          decodeBlock(component, decodeFn, mcu);
+          mcu++;
+        }
+      } else {
+        for (n = 0; n < resetInterval; n++) {
+          for (i = 0; i < componentsLength; i++) {
+            component = components[i];
+            h = component.h;
+            v = component.v;
+            for (j = 0; j < v; j++) {
+              for (k = 0; k < h; k++) {
+                decodeMcu(component, decodeFn, mcu, j, k);
+              }
+            }
+          }
+          mcu++;
+
+          // If we've reached our expected MCU's, stop decoding
+          if (mcu === mcuExpected) break;
+        }
+      }
+
+      // find marker
+      bitsCount = 0;
+      marker = (data[offset] << 8) | data[offset + 1];
+      if (marker < 0xFF00) {
+        throw "marker was not found";
+      }
+
+      if (marker >= 0xFFD0 && marker <= 0xFFD7) { // RSTx
+        offset += 2;
+      }
+      else
+        break;
+    }
+
+    return offset - startOffset;
+  }
+
+  function buildComponentData(frame, component) {
+    var lines = [];
+    var blocksPerLine = component.blocksPerLine;
+    var blocksPerColumn = component.blocksPerColumn;
+    var samplesPerLine = blocksPerLine << 3;
+    var R = new Int32Array(64), r = new Uint8Array(64);
+
+    // A port of poppler's IDCT method which in turn is taken from:
+    //   Christoph Loeffler, Adriaan Ligtenberg, George S. Moschytz,
+    //   "Practical Fast 1-D DCT Algorithms with 11 Multiplications",
+    //   IEEE Intl. Conf. on Acoustics, Speech & Signal Processing, 1989,
+    //   988-991.
+    function quantizeAndInverse(zz, dataOut, dataIn) {
+      var qt = component.quantizationTable;
+      var v0, v1, v2, v3, v4, v5, v6, v7, t;
+      var p = dataIn;
+      var i;
+
+      // dequant
+      for (i = 0; i < 64; i++)
+        p[i] = zz[i] * qt[i];
+
+      // inverse DCT on rows
+      for (i = 0; i < 8; ++i) {
+        var row = 8 * i;
+
+        // check for all-zero AC coefficients
+        if (p[1 + row] == 0 && p[2 + row] == 0 && p[3 + row] == 0 &&
+            p[4 + row] == 0 && p[5 + row] == 0 && p[6 + row] == 0 &&
+            p[7 + row] == 0) {
+          t = (dctSqrt2 * p[0 + row] + 512) >> 10;
+          p[0 + row] = t;
+          p[1 + row] = t;
+          p[2 + row] = t;
+          p[3 + row] = t;
+          p[4 + row] = t;
+          p[5 + row] = t;
+          p[6 + row] = t;
+          p[7 + row] = t;
+          continue;
+        }
+
+        // stage 4
+        v0 = (dctSqrt2 * p[0 + row] + 128) >> 8;
+        v1 = (dctSqrt2 * p[4 + row] + 128) >> 8;
+        v2 = p[2 + row];
+        v3 = p[6 + row];
+        v4 = (dctSqrt1d2 * (p[1 + row] - p[7 + row]) + 128) >> 8;
+        v7 = (dctSqrt1d2 * (p[1 + row] + p[7 + row]) + 128) >> 8;
+        v5 = p[3 + row] << 4;
+        v6 = p[5 + row] << 4;
+
+        // stage 3
+        t = (v0 - v1+ 1) >> 1;
+        v0 = (v0 + v1 + 1) >> 1;
+        v1 = t;
+        t = (v2 * dctSin6 + v3 * dctCos6 + 128) >> 8;
+        v2 = (v2 * dctCos6 - v3 * dctSin6 + 128) >> 8;
+        v3 = t;
+        t = (v4 - v6 + 1) >> 1;
+        v4 = (v4 + v6 + 1) >> 1;
+        v6 = t;
+        t = (v7 + v5 + 1) >> 1;
+        v5 = (v7 - v5 + 1) >> 1;
+        v7 = t;
+
+        // stage 2
+        t = (v0 - v3 + 1) >> 1;
+        v0 = (v0 + v3 + 1) >> 1;
+        v3 = t;
+        t = (v1 - v2 + 1) >> 1;
+        v1 = (v1 + v2 + 1) >> 1;
+        v2 = t;
+        t = (v4 * dctSin3 + v7 * dctCos3 + 2048) >> 12;
+        v4 = (v4 * dctCos3 - v7 * dctSin3 + 2048) >> 12;
+        v7 = t;
+        t = (v5 * dctSin1 + v6 * dctCos1 + 2048) >> 12;
+        v5 = (v5 * dctCos1 - v6 * dctSin1 + 2048) >> 12;
+        v6 = t;
+
+        // stage 1
+        p[0 + row] = v0 + v7;
+        p[7 + row] = v0 - v7;
+        p[1 + row] = v1 + v6;
+        p[6 + row] = v1 - v6;
+        p[2 + row] = v2 + v5;
+        p[5 + row] = v2 - v5;
+        p[3 + row] = v3 + v4;
+        p[4 + row] = v3 - v4;
+      }
+
+      // inverse DCT on columns
+      for (i = 0; i < 8; ++i) {
+        var col = i;
+
+        // check for all-zero AC coefficients
+        if (p[1*8 + col] == 0 && p[2*8 + col] == 0 && p[3*8 + col] == 0 &&
+            p[4*8 + col] == 0 && p[5*8 + col] == 0 && p[6*8 + col] == 0 &&
+            p[7*8 + col] == 0) {
+          t = (dctSqrt2 * dataIn[i+0] + 8192) >> 14;
+          p[0*8 + col] = t;
+          p[1*8 + col] = t;
+          p[2*8 + col] = t;
+          p[3*8 + col] = t;
+          p[4*8 + col] = t;
+          p[5*8 + col] = t;
+          p[6*8 + col] = t;
+          p[7*8 + col] = t;
+          continue;
+        }
+
+        // stage 4
+        v0 = (dctSqrt2 * p[0*8 + col] + 2048) >> 12;
+        v1 = (dctSqrt2 * p[4*8 + col] + 2048) >> 12;
+        v2 = p[2*8 + col];
+        v3 = p[6*8 + col];
+        v4 = (dctSqrt1d2 * (p[1*8 + col] - p[7*8 + col]) + 2048) >> 12;
+        v7 = (dctSqrt1d2 * (p[1*8 + col] + p[7*8 + col]) + 2048) >> 12;
+        v5 = p[3*8 + col];
+        v6 = p[5*8 + col];
+
+        // stage 3
+        t = (v0 - v1 + 1) >> 1;
+        v0 = (v0 + v1 + 1) >> 1;
+        v1 = t;
+        t = (v2 * dctSin6 + v3 * dctCos6 + 2048) >> 12;
+        v2 = (v2 * dctCos6 - v3 * dctSin6 + 2048) >> 12;
+        v3 = t;
+        t = (v4 - v6 + 1) >> 1;
+        v4 = (v4 + v6 + 1) >> 1;
+        v6 = t;
+        t = (v7 + v5 + 1) >> 1;
+        v5 = (v7 - v5 + 1) >> 1;
+        v7 = t;
+
+        // stage 2
+        t = (v0 - v3 + 1) >> 1;
+        v0 = (v0 + v3 + 1) >> 1;
+        v3 = t;
+        t = (v1 - v2 + 1) >> 1;
+        v1 = (v1 + v2 + 1) >> 1;
+        v2 = t;
+        t = (v4 * dctSin3 + v7 * dctCos3 + 2048) >> 12;
+        v4 = (v4 * dctCos3 - v7 * dctSin3 + 2048) >> 12;
+        v7 = t;
+        t = (v5 * dctSin1 + v6 * dctCos1 + 2048) >> 12;
+        v5 = (v5 * dctCos1 - v6 * dctSin1 + 2048) >> 12;
+        v6 = t;
+
+        // stage 1
+        p[0*8 + col] = v0 + v7;
+        p[7*8 + col] = v0 - v7;
+        p[1*8 + col] = v1 + v6;
+        p[6*8 + col] = v1 - v6;
+        p[2*8 + col] = v2 + v5;
+        p[5*8 + col] = v2 - v5;
+        p[3*8 + col] = v3 + v4;
+        p[4*8 + col] = v3 - v4;
+      }
+
+      // convert to 8-bit integers
+      for (i = 0; i < 64; ++i) {
+        var sample = 128 + ((p[i] + 8) >> 4);
+        dataOut[i] = sample < 0 ? 0 : sample > 0xFF ? 0xFF : sample;
+      }
+    }
+
+    var i, j;
+    for (var blockRow = 0; blockRow < blocksPerColumn; blockRow++) {
+      var scanLine = blockRow << 3;
+      for (i = 0; i < 8; i++)
+        lines.push(new Uint8Array(samplesPerLine));
+      for (var blockCol = 0; blockCol < blocksPerLine; blockCol++) {
+        quantizeAndInverse(component.blocks[blockRow][blockCol], r, R);
+
+        var offset = 0, sample = blockCol << 3;
+        for (j = 0; j < 8; j++) {
+          var line = lines[scanLine + j];
+          for (i = 0; i < 8; i++)
+            line[sample + i] = r[offset++];
+        }
+      }
+    }
+    return lines;
+  }
+
+  function clampTo8bit(a) {
+    return a < 0 ? 0 : a > 255 ? 255 : a;
+  }
+
+  constructor.prototype = {
+    load: function load(path) {
+      var xhr = new XMLHttpRequest();
+      xhr.open("GET", path, true);
+      xhr.responseType = "arraybuffer";
+      xhr.onload = (function() {
+        // TODO catch parse error
+        var data = new Uint8Array(xhr.response || xhr.mozResponseArrayBuffer);
+        this.parse(data);
+        if (this.onload)
+          this.onload();
+      }).bind(this);
+      xhr.send(null);
+    },
+    parse: function parse(data) {
+      var offset = 0, length = data.length;
+      function readUint16() {
+        var value = (data[offset] << 8) | data[offset + 1];
+        offset += 2;
+        return value;
+      }
+      function readDataBlock() {
+        var length = readUint16();
+        var array = data.subarray(offset, offset + length - 2);
+        offset += array.length;
+        return array;
+      }
+      function prepareComponents(frame) {
+        var maxH = 0, maxV = 0;
+        var component, componentId;
+        for (componentId in frame.components) {
+          if (frame.components.hasOwnProperty(componentId)) {
+            component = frame.components[componentId];
+            if (maxH < component.h) maxH = component.h;
+            if (maxV < component.v) maxV = component.v;
+          }
+        }
+        var mcusPerLine = Math.ceil(frame.samplesPerLine / 8 / maxH);
+        var mcusPerColumn = Math.ceil(frame.scanLines / 8 / maxV);
+        for (componentId in frame.components) {
+          if (frame.components.hasOwnProperty(componentId)) {
+            component = frame.components[componentId];
+            var blocksPerLine = Math.ceil(Math.ceil(frame.samplesPerLine / 8) * component.h / maxH);
+            var blocksPerColumn = Math.ceil(Math.ceil(frame.scanLines  / 8) * component.v / maxV);
+            var blocksPerLineForMcu = mcusPerLine * component.h;
+            var blocksPerColumnForMcu = mcusPerColumn * component.v;
+            var blocks = [];
+            for (var i = 0; i < blocksPerColumnForMcu; i++) {
+              var row = [];
+              for (var j = 0; j < blocksPerLineForMcu; j++)
+                row.push(new Int32Array(64));
+              blocks.push(row);
+            }
+            component.blocksPerLine = blocksPerLine;
+            component.blocksPerColumn = blocksPerColumn;
+            component.blocks = blocks;
+          }
+        }
+        frame.maxH = maxH;
+        frame.maxV = maxV;
+        frame.mcusPerLine = mcusPerLine;
+        frame.mcusPerColumn = mcusPerColumn;
+      }
+      var jfif = null;
+      var adobe = null;
+      var pixels = null;
+      var frame, resetInterval;
+      var quantizationTables = [], frames = [];
+      var huffmanTablesAC = [], huffmanTablesDC = [];
+      var fileMarker = readUint16();
+      if (fileMarker != 0xFFD8) { // SOI (Start of Image)
+        throw "SOI not found";
+      }
+
+      fileMarker = readUint16();
+      while (fileMarker != 0xFFD9) { // EOI (End of image)
+        var i, j, l;
+        switch(fileMarker) {
+          case 0xFF00: break;
+          case 0xFFE0: // APP0 (Application Specific)
+          case 0xFFE1: // APP1
+          case 0xFFE2: // APP2
+          case 0xFFE3: // APP3
+          case 0xFFE4: // APP4
+          case 0xFFE5: // APP5
+          case 0xFFE6: // APP6
+          case 0xFFE7: // APP7
+          case 0xFFE8: // APP8
+          case 0xFFE9: // APP9
+          case 0xFFEA: // APP10
+          case 0xFFEB: // APP11
+          case 0xFFEC: // APP12
+          case 0xFFED: // APP13
+          case 0xFFEE: // APP14
+          case 0xFFEF: // APP15
+          case 0xFFFE: // COM (Comment)
+            var appData = readDataBlock();
+
+            if (fileMarker === 0xFFE0) {
+              if (appData[0] === 0x4A && appData[1] === 0x46 && appData[2] === 0x49 &&
+                appData[3] === 0x46 && appData[4] === 0) { // 'JFIF\x00'
+                jfif = {
+                  version: { major: appData[5], minor: appData[6] },
+                  densityUnits: appData[7],
+                  xDensity: (appData[8] << 8) | appData[9],
+                  yDensity: (appData[10] << 8) | appData[11],
+                  thumbWidth: appData[12],
+                  thumbHeight: appData[13],
+                  thumbData: appData.subarray(14, 14 + 3 * appData[12] * appData[13])
+                };
+              }
+            }
+            // TODO APP1 - Exif
+            if (fileMarker === 0xFFEE) {
+              if (appData[0] === 0x41 && appData[1] === 0x64 && appData[2] === 0x6F &&
+                appData[3] === 0x62 && appData[4] === 0x65 && appData[5] === 0) { // 'Adobe\x00'
+                adobe = {
+                  version: appData[6],
+                  flags0: (appData[7] << 8) | appData[8],
+                  flags1: (appData[9] << 8) | appData[10],
+                  transformCode: appData[11]
+                };
+              }
+            }
+            break;
+
+          case 0xFFDB: // DQT (Define Quantization Tables)
+            var quantizationTablesLength = readUint16();
+            var quantizationTablesEnd = quantizationTablesLength + offset - 2;
+            while (offset < quantizationTablesEnd) {
+              var quantizationTableSpec = data[offset++];
+              var tableData = new Int32Array(64);
+              if ((quantizationTableSpec >> 4) === 0) { // 8 bit values
+                for (j = 0; j < 64; j++) {
+                  var z = dctZigZag[j];
+                  tableData[z] = data[offset++];
+                }
+              } else if ((quantizationTableSpec >> 4) === 1) { //16 bit
+                for (j = 0; j < 64; j++) {
+                  var z = dctZigZag[j];
+                  tableData[z] = readUint16();
+                }
+              } else
+                throw "DQT: invalid table spec";
+              quantizationTables[quantizationTableSpec & 15] = tableData;
+            }
+            break;
+
+          case 0xFFC0: // SOF0 (Start of Frame, Baseline DCT)
+          case 0xFFC1: // SOF1 (Start of Frame, Extended DCT)
+          case 0xFFC2: // SOF2 (Start of Frame, Progressive DCT)
+            readUint16(); // skip data length
+            frame = {};
+            frame.extended = (fileMarker === 0xFFC1);
+            frame.progressive = (fileMarker === 0xFFC2);
+            frame.precision = data[offset++];
+            frame.scanLines = readUint16();
+            frame.samplesPerLine = readUint16();
+            frame.components = {};
+            frame.componentsOrder = [];
+            var componentsCount = data[offset++], componentId;
+            var maxH = 0, maxV = 0;
+            for (i = 0; i < componentsCount; i++) {
+              componentId = data[offset];
+              var h = data[offset + 1] >> 4;
+              var v = data[offset + 1] & 15;
+              var qId = data[offset + 2];
+              frame.componentsOrder.push(componentId);
+              frame.components[componentId] = {
+                h: h,
+                v: v,
+                quantizationIdx: qId
+              };
+              offset += 3;
+            }
+            prepareComponents(frame);
+            frames.push(frame);
+            break;
+
+          case 0xFFC4: // DHT (Define Huffman Tables)
+            var huffmanLength = readUint16();
+            for (i = 2; i < huffmanLength;) {
+              var huffmanTableSpec = data[offset++];
+              var codeLengths = new Uint8Array(16);
+              var codeLengthSum = 0;
+              for (j = 0; j < 16; j++, offset++)
+                codeLengthSum += (codeLengths[j] = data[offset]);
+              var huffmanValues = new Uint8Array(codeLengthSum);
+              for (j = 0; j < codeLengthSum; j++, offset++)
+                huffmanValues[j] = data[offset];
+              i += 17 + codeLengthSum;
+
+              ((huffmanTableSpec >> 4) === 0 ? 
+                huffmanTablesDC : huffmanTablesAC)[huffmanTableSpec & 15] =
+                buildHuffmanTable(codeLengths, huffmanValues);
+            }
+            break;
+
+          case 0xFFDD: // DRI (Define Restart Interval)
+            readUint16(); // skip data length
+            resetInterval = readUint16();
+            break;
+
+          case 0xFFDA: // SOS (Start of Scan)
+            var scanLength = readUint16();
+            var selectorsCount = data[offset++];
+            var components = [], component;
+            for (i = 0; i < selectorsCount; i++) {
+              component = frame.components[data[offset++]];
+              var tableSpec = data[offset++];
+              component.huffmanTableDC = huffmanTablesDC[tableSpec >> 4];
+              component.huffmanTableAC = huffmanTablesAC[tableSpec & 15];
+              components.push(component);
+            }
+            var spectralStart = data[offset++];
+            var spectralEnd = data[offset++];
+            var successiveApproximation = data[offset++];
+            var processed = decodeScan(data, offset,
+              frame, components, resetInterval,
+              spectralStart, spectralEnd,
+              successiveApproximation >> 4, successiveApproximation & 15);
+            offset += processed;
+            break;
+          default:
+            if (data[offset - 3] == 0xFF &&
+                data[offset - 2] >= 0xC0 && data[offset - 2] <= 0xFE) {
+              // could be incorrect encoding -- last 0xFF byte of the previous
+              // block was eaten by the encoder
+              offset -= 3;
+              break;
+            }
+            throw "unknown JPEG marker " + fileMarker.toString(16);
+        }
+        fileMarker = readUint16();
+      }
+      if (frames.length != 1)
+        throw "only single frame JPEGs supported";
+
+      // set each frame's components quantization table
+      for (var i = 0; i < frames.length; i++) {
+        var cp = frames[i].components;
+        for (var j in cp) {
+          cp[j].quantizationTable = quantizationTables[cp[j].quantizationIdx];
+          delete cp[j].quantizationIdx;
+        }
+      }
+
+      this.width = frame.samplesPerLine;
+      this.height = frame.scanLines;
+      this.jfif = jfif;
+      this.adobe = adobe;
+      this.components = [];
+      for (var i = 0; i < frame.componentsOrder.length; i++) {
+        var component = frame.components[frame.componentsOrder[i]];
+        this.components.push({
+          lines: buildComponentData(frame, component),
+          scaleX: component.h / frame.maxH,
+          scaleY: component.v / frame.maxV
+        });
+      }
+    },
+    getData: function getData(width, height) {
+      var scaleX = this.width / width, scaleY = this.height / height;
+
+      var component1, component2, component3, component4;
+      var component1Line, component2Line, component3Line, component4Line;
+      var x, y;
+      var offset = 0;
+      var Y, Cb, Cr, K, C, M, Ye, R, G, B;
+      var colorTransform;
+      var dataLength = width * height * this.components.length;
+      var data = new Uint8Array(dataLength);
+      switch (this.components.length) {
+        case 1:
+          component1 = this.components[0];
+          for (y = 0; y < height; y++) {
+            component1Line = component1.lines[0 | (y * component1.scaleY * scaleY)];
+            for (x = 0; x < width; x++) {
+              Y = component1Line[0 | (x * component1.scaleX * scaleX)];
+
+              data[offset++] = Y;
+            }
+          }
+          break;
+        case 2:
+          // PDF might compress two component data in custom colorspace
+          component1 = this.components[0];
+          component2 = this.components[1];
+          for (y = 0; y < height; y++) {
+            component1Line = component1.lines[0 | (y * component1.scaleY * scaleY)];
+            component2Line = component2.lines[0 | (y * component2.scaleY * scaleY)];
+            for (x = 0; x < width; x++) {
+              Y = component1Line[0 | (x * component1.scaleX * scaleX)];
+              data[offset++] = Y;
+              Y = component2Line[0 | (x * component2.scaleX * scaleX)];
+              data[offset++] = Y;
+            }
+          }
+          break;
+        case 3:
+          // The default transform for three components is true
+          colorTransform = true;
+          // The adobe transform marker overrides any previous setting
+          if (this.adobe && this.adobe.transformCode)
+            colorTransform = true;
+          else if (typeof this.colorTransform !== 'undefined')
+            colorTransform = !!this.colorTransform;
+
+          component1 = this.components[0];
+          component2 = this.components[1];
+          component3 = this.components[2];
+          for (y = 0; y < height; y++) {
+            component1Line = component1.lines[0 | (y * component1.scaleY * scaleY)];
+            component2Line = component2.lines[0 | (y * component2.scaleY * scaleY)];
+            component3Line = component3.lines[0 | (y * component3.scaleY * scaleY)];
+            for (x = 0; x < width; x++) {
+              if (!colorTransform) {
+                R = component1Line[0 | (x * component1.scaleX * scaleX)];
+                G = component2Line[0 | (x * component2.scaleX * scaleX)];
+                B = component3Line[0 | (x * component3.scaleX * scaleX)];
+              } else {
+                Y = component1Line[0 | (x * component1.scaleX * scaleX)];
+                Cb = component2Line[0 | (x * component2.scaleX * scaleX)];
+                Cr = component3Line[0 | (x * component3.scaleX * scaleX)];
+
+                R = clampTo8bit(Y + 1.402 * (Cr - 128));
+                G = clampTo8bit(Y - 0.3441363 * (Cb - 128) - 0.71413636 * (Cr - 128));
+                B = clampTo8bit(Y + 1.772 * (Cb - 128));
+              }
+
+              data[offset++] = R;
+              data[offset++] = G;
+              data[offset++] = B;
+            }
+          }
+          break;
+        case 4:
+          if (!this.adobe)
+            throw 'Unsupported color mode (4 components)';
+          // The default transform for four components is false
+          colorTransform = false;
+          // The adobe transform marker overrides any previous setting
+          if (this.adobe && this.adobe.transformCode)
+            colorTransform = true;
+          else if (typeof this.colorTransform !== 'undefined')
+            colorTransform = !!this.colorTransform;
+
+          component1 = this.components[0];
+          component2 = this.components[1];
+          component3 = this.components[2];
+          component4 = this.components[3];
+          for (y = 0; y < height; y++) {
+            component1Line = component1.lines[0 | (y * component1.scaleY * scaleY)];
+            component2Line = component2.lines[0 | (y * component2.scaleY * scaleY)];
+            component3Line = component3.lines[0 | (y * component3.scaleY * scaleY)];
+            component4Line = component4.lines[0 | (y * component4.scaleY * scaleY)];
+            for (x = 0; x < width; x++) {
+              if (!colorTransform) {
+                C = component1Line[0 | (x * component1.scaleX * scaleX)];
+                M = component2Line[0 | (x * component2.scaleX * scaleX)];
+                Ye = component3Line[0 | (x * component3.scaleX * scaleX)];
+                K = component4Line[0 | (x * component4.scaleX * scaleX)];
+              } else {
+                Y = component1Line[0 | (x * component1.scaleX * scaleX)];
+                Cb = component2Line[0 | (x * component2.scaleX * scaleX)];
+                Cr = component3Line[0 | (x * component3.scaleX * scaleX)];
+                K = component4Line[0 | (x * component4.scaleX * scaleX)];
+
+                C = 255 - clampTo8bit(Y + 1.402 * (Cr - 128));
+                M = 255 - clampTo8bit(Y - 0.3441363 * (Cb - 128) - 0.71413636 * (Cr - 128));
+                Ye = 255 - clampTo8bit(Y + 1.772 * (Cb - 128));
+              }
+              data[offset++] = 255-C;
+              data[offset++] = 255-M;
+              data[offset++] = 255-Ye;
+              data[offset++] = 255-K;
+            }
+          }
+          break;
+        default:
+          throw 'Unsupported color mode';
+      }
+      return data;
+    },
+    copyToImageData: function copyToImageData(imageData) {
+      var width = imageData.width, height = imageData.height;
+      var imageDataArray = imageData.data;
+      var data = this.getData(width, height);
+      var i = 0, j = 0, x, y;
+      var Y, K, C, M, R, G, B;
+      switch (this.components.length) {
+        case 1:
+          for (y = 0; y < height; y++) {
+            for (x = 0; x < width; x++) {
+              Y = data[i++];
+
+              imageDataArray[j++] = Y;
+              imageDataArray[j++] = Y;
+              imageDataArray[j++] = Y;
+              imageDataArray[j++] = 255;
+            }
+          }
+          break;
+        case 3:
+          for (y = 0; y < height; y++) {
+            for (x = 0; x < width; x++) {
+              R = data[i++];
+              G = data[i++];
+              B = data[i++];
+
+              imageDataArray[j++] = R;
+              imageDataArray[j++] = G;
+              imageDataArray[j++] = B;
+              imageDataArray[j++] = 255;
+            }
+          }
+          break;
+        case 4:
+          for (y = 0; y < height; y++) {
+            for (x = 0; x < width; x++) {
+              C = data[i++];
+              M = data[i++];
+              Y = data[i++];
+              K = data[i++];
+
+              R = 255 - clampTo8bit(C * (1 - K / 255) + K);
+              G = 255 - clampTo8bit(M * (1 - K / 255) + K);
+              B = 255 - clampTo8bit(Y * (1 - K / 255) + K);
+
+              imageDataArray[j++] = R;
+              imageDataArray[j++] = G;
+              imageDataArray[j++] = B;
+              imageDataArray[j++] = 255;
+            }
+          }
+          break;
+        default:
+          throw 'Unsupported color mode';
+      }
+    }
+  };
+
+  return constructor;
+})();
+module.exports = decode;
+
+function decode(jpegData, useTArray) {
+  var arr = new Uint8Array(jpegData);
+  var decoder = new JpegImage();
+  decoder.parse(arr);
+
+  var image = {
+    width: decoder.width,
+    height: decoder.height,
+    data: useTArray ?
+      new Uint8Array(decoder.width * decoder.height * 4) :
+      new Buffer(decoder.width * decoder.height * 4)
+  };
+
+  decoder.copyToImageData(image);
+
+  return image;
+}

build/node_modules/jpeg-js/lib/encoder.js

@@ -0,0 +1,766 @@
+/*
+  Copyright (c) 2008, Adobe Systems Incorporated
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without 
+  modification, are permitted provided that the following conditions are
+  met:
+
+  * Redistributions of source code must retain the above copyright notice, 
+    this list of conditions and the following disclaimer.
+  
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the 
+    documentation and/or other materials provided with the distribution.
+  
+  * Neither the name of Adobe Systems Incorporated nor the names of its 
+    contributors may be used to endorse or promote products derived from 
+    this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/*
+JPEG encoder ported to JavaScript and optimized by Andreas Ritter, www.bytestrom.eu, 11/2009
+
+Basic GUI blocking jpeg encoder
+*/
+
+var btoa = btoa || function(buf) {
+  return new Buffer(buf).toString('base64');
+};
+
+function JPEGEncoder(quality) {
+  var self = this;
+	var fround = Math.round;
+	var ffloor = Math.floor;
+	var YTable = new Array(64);
+	var UVTable = new Array(64);
+	var fdtbl_Y = new Array(64);
+	var fdtbl_UV = new Array(64);
+	var YDC_HT;
+	var UVDC_HT;
+	var YAC_HT;
+	var UVAC_HT;
+	
+	var bitcode = new Array(65535);
+	var category = new Array(65535);
+	var outputfDCTQuant = new Array(64);
+	var DU = new Array(64);
+	var byteout = [];
+	var bytenew = 0;
+	var bytepos = 7;
+	
+	var YDU = new Array(64);
+	var UDU = new Array(64);
+	var VDU = new Array(64);
+	var clt = new Array(256);
+	var RGB_YUV_TABLE = new Array(2048);
+	var currentQuality;
+	
+	var ZigZag = [
+			 0, 1, 5, 6,14,15,27,28,
+			 2, 4, 7,13,16,26,29,42,
+			 3, 8,12,17,25,30,41,43,
+			 9,11,18,24,31,40,44,53,
+			10,19,23,32,39,45,52,54,
+			20,22,33,38,46,51,55,60,
+			21,34,37,47,50,56,59,61,
+			35,36,48,49,57,58,62,63
+		];
+	
+	var std_dc_luminance_nrcodes = [0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0];
+	var std_dc_luminance_values = [0,1,2,3,4,5,6,7,8,9,10,11];
+	var std_ac_luminance_nrcodes = [0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d];
+	var std_ac_luminance_values = [
+			0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,
+			0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,
+			0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08,
+			0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,
+			0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,
+			0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28,
+			0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,
+			0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,
+			0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59,
+			0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,
+			0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,
+			0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89,
+			0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,
+			0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,
+			0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6,
+			0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,
+			0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,
+			0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2,
+			0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,
+			0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,
+			0xf9,0xfa
+		];
+	
+	var std_dc_chrominance_nrcodes = [0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0];
+	var std_dc_chrominance_values = [0,1,2,3,4,5,6,7,8,9,10,11];
+	var std_ac_chrominance_nrcodes = [0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77];
+	var std_ac_chrominance_values = [
+			0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,
+			0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,
+			0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91,
+			0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,
+			0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,
+			0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26,
+			0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,
+			0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,
+			0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,
+			0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,
+			0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,
+			0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87,
+			0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,
+			0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,
+			0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,
+			0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,
+			0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,
+			0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,
+			0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,
+			0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,
+			0xf9,0xfa
+		];
+	
+	function initQuantTables(sf){
+			var YQT = [
+				16, 11, 10, 16, 24, 40, 51, 61,
+				12, 12, 14, 19, 26, 58, 60, 55,
+				14, 13, 16, 24, 40, 57, 69, 56,
+				14, 17, 22, 29, 51, 87, 80, 62,
+				18, 22, 37, 56, 68,109,103, 77,
+				24, 35, 55, 64, 81,104,113, 92,
+				49, 64, 78, 87,103,121,120,101,
+				72, 92, 95, 98,112,100,103, 99
+			];
+			
+			for (var i = 0; i < 64; i++) {
+				var t = ffloor((YQT[i]*sf+50)/100);
+				if (t < 1) {
+					t = 1;
+				} else if (t > 255) {
+					t = 255;
+				}
+				YTable[ZigZag[i]] = t;
+			}
+			var UVQT = [
+				17, 18, 24, 47, 99, 99, 99, 99,
+				18, 21, 26, 66, 99, 99, 99, 99,
+				24, 26, 56, 99, 99, 99, 99, 99,
+				47, 66, 99, 99, 99, 99, 99, 99,
+				99, 99, 99, 99, 99, 99, 99, 99,
+				99, 99, 99, 99, 99, 99, 99, 99,
+				99, 99, 99, 99, 99, 99, 99, 99,
+				99, 99, 99, 99, 99, 99, 99, 99
+			];
+			for (var j = 0; j < 64; j++) {
+				var u = ffloor((UVQT[j]*sf+50)/100);
+				if (u < 1) {
+					u = 1;
+				} else if (u > 255) {
+					u = 255;
+				}
+				UVTable[ZigZag[j]] = u;
+			}
+			var aasf = [
+				1.0, 1.387039845, 1.306562965, 1.175875602,
+				1.0, 0.785694958, 0.541196100, 0.275899379
+			];
+			var k = 0;
+			for (var row = 0; row < 8; row++)
+			{
+				for (var col = 0; col < 8; col++)
+				{
+					fdtbl_Y[k]  = (1.0 / (YTable [ZigZag[k]] * aasf[row] * aasf[col] * 8.0));
+					fdtbl_UV[k] = (1.0 / (UVTable[ZigZag[k]] * aasf[row] * aasf[col] * 8.0));
+					k++;
+				}
+			}
+		}
+		
+		function computeHuffmanTbl(nrcodes, std_table){
+			var codevalue = 0;
+			var pos_in_table = 0;
+			var HT = new Array();
+			for (var k = 1; k <= 16; k++) {
+				for (var j = 1; j <= nrcodes[k]; j++) {
+					HT[std_table[pos_in_table]] = [];
+					HT[std_table[pos_in_table]][0] = codevalue;
+					HT[std_table[pos_in_table]][1] = k;
+					pos_in_table++;
+					codevalue++;
+				}
+				codevalue*=2;
+			}
+			return HT;
+		}
+		
+		function initHuffmanTbl()
+		{
+			YDC_HT = computeHuffmanTbl(std_dc_luminance_nrcodes,std_dc_luminance_values);
+			UVDC_HT = computeHuffmanTbl(std_dc_chrominance_nrcodes,std_dc_chrominance_values);
+			YAC_HT = computeHuffmanTbl(std_ac_luminance_nrcodes,std_ac_luminance_values);
+			UVAC_HT = computeHuffmanTbl(std_ac_chrominance_nrcodes,std_ac_chrominance_values);
+		}
+	
+		function initCategoryNumber()
+		{
+			var nrlower = 1;
+			var nrupper = 2;
+			for (var cat = 1; cat <= 15; cat++) {
+				//Positive numbers
+				for (var nr = nrlower; nr<nrupper; nr++) {
+					category[32767+nr] = cat;
+					bitcode[32767+nr] = [];
+					bitcode[32767+nr][1] = cat;
+					bitcode[32767+nr][0] = nr;
+				}
+				//Negative numbers
+				for (var nrneg =-(nrupper-1); nrneg<=-nrlower; nrneg++) {
+					category[32767+nrneg] = cat;
+					bitcode[32767+nrneg] = [];
+					bitcode[32767+nrneg][1] = cat;
+					bitcode[32767+nrneg][0] = nrupper-1+nrneg;
+				}
+				nrlower <<= 1;
+				nrupper <<= 1;
+			}
+		}
+		
+		function initRGBYUVTable() {
+			for(var i = 0; i < 256;i++) {
+				RGB_YUV_TABLE[i]      		=  19595 * i;
+				RGB_YUV_TABLE[(i+ 256)>>0] 	=  38470 * i;
+				RGB_YUV_TABLE[(i+ 512)>>0] 	=   7471 * i + 0x8000;
+				RGB_YUV_TABLE[(i+ 768)>>0] 	= -11059 * i;
+				RGB_YUV_TABLE[(i+1024)>>0] 	= -21709 * i;
+				RGB_YUV_TABLE[(i+1280)>>0] 	=  32768 * i + 0x807FFF;
+				RGB_YUV_TABLE[(i+1536)>>0] 	= -27439 * i;
+				RGB_YUV_TABLE[(i+1792)>>0] 	= - 5329 * i;
+			}
+		}
+		
+		// IO functions
+		function writeBits(bs)
+		{
+			var value = bs[0];
+			var posval = bs[1]-1;
+			while ( posval >= 0 ) {
+				if (value & (1 << posval) ) {
+					bytenew |= (1 << bytepos);
+				}
+				posval--;
+				bytepos--;
+				if (bytepos < 0) {
+					if (bytenew == 0xFF) {
+						writeByte(0xFF);
+						writeByte(0);
+					}
+					else {
+						writeByte(bytenew);
+					}
+					bytepos=7;
+					bytenew=0;
+				}
+			}
+		}
+	
+		function writeByte(value)
+		{
+			//byteout.push(clt[value]); // write char directly instead of converting later
+      byteout.push(value);
+		}
+	
+		function writeWord(value)
+		{
+			writeByte((value>>8)&0xFF);
+			writeByte((value   )&0xFF);
+		}
+		
+		// DCT & quantization core
+		function fDCTQuant(data, fdtbl)
+		{
+			var d0, d1, d2, d3, d4, d5, d6, d7;
+			/* Pass 1: process rows. */
+			var dataOff=0;
+			var i;
+			const I8 = 8;
+			const I64 = 64;
+			for (i=0; i<I8; ++i)
+			{
+				d0 = data[dataOff];
+				d1 = data[dataOff+1];
+				d2 = data[dataOff+2];
+				d3 = data[dataOff+3];
+				d4 = data[dataOff+4];
+				d5 = data[dataOff+5];
+				d6 = data[dataOff+6];
+				d7 = data[dataOff+7];
+				
+				var tmp0 = d0 + d7;
+				var tmp7 = d0 - d7;
+				var tmp1 = d1 + d6;
+				var tmp6 = d1 - d6;
+				var tmp2 = d2 + d5;
+				var tmp5 = d2 - d5;
+				var tmp3 = d3 + d4;
+				var tmp4 = d3 - d4;
+	
+				/* Even part */
+				var tmp10 = tmp0 + tmp3;	/* phase 2 */
+				var tmp13 = tmp0 - tmp3;
+				var tmp11 = tmp1 + tmp2;
+				var tmp12 = tmp1 - tmp2;
+	
+				data[dataOff] = tmp10 + tmp11; /* phase 3 */
+				data[dataOff+4] = tmp10 - tmp11;
+	
+				var z1 = (tmp12 + tmp13) * 0.707106781; /* c4 */
+				data[dataOff+2] = tmp13 + z1; /* phase 5 */
+				data[dataOff+6] = tmp13 - z1;
+	
+				/* Odd part */
+				tmp10 = tmp4 + tmp5; /* phase 2 */
+				tmp11 = tmp5 + tmp6;
+				tmp12 = tmp6 + tmp7;
+	
+				/* The rotator is modified from fig 4-8 to avoid extra negations. */
+				var z5 = (tmp10 - tmp12) * 0.382683433; /* c6 */
+				var z2 = 0.541196100 * tmp10 + z5; /* c2-c6 */
+				var z4 = 1.306562965 * tmp12 + z5; /* c2+c6 */
+				var z3 = tmp11 * 0.707106781; /* c4 */
+	
+				var z11 = tmp7 + z3;	/* phase 5 */
+				var z13 = tmp7 - z3;
+	
+				data[dataOff+5] = z13 + z2;	/* phase 6 */
+				data[dataOff+3] = z13 - z2;
+				data[dataOff+1] = z11 + z4;
+				data[dataOff+7] = z11 - z4;
+	
+				dataOff += 8; /* advance pointer to next row */
+			}
+	
+			/* Pass 2: process columns. */
+			dataOff = 0;
+			for (i=0; i<I8; ++i)
+			{
+				d0 = data[dataOff];
+				d1 = data[dataOff + 8];
+				d2 = data[dataOff + 16];
+				d3 = data[dataOff + 24];
+				d4 = data[dataOff + 32];
+				d5 = data[dataOff + 40];
+				d6 = data[dataOff + 48];
+				d7 = data[dataOff + 56];
+				
+				var tmp0p2 = d0 + d7;
+				var tmp7p2 = d0 - d7;
+				var tmp1p2 = d1 + d6;
+				var tmp6p2 = d1 - d6;
+				var tmp2p2 = d2 + d5;
+				var tmp5p2 = d2 - d5;
+				var tmp3p2 = d3 + d4;
+				var tmp4p2 = d3 - d4;
+	
+				/* Even part */
+				var tmp10p2 = tmp0p2 + tmp3p2;	/* phase 2 */
+				var tmp13p2 = tmp0p2 - tmp3p2;
+				var tmp11p2 = tmp1p2 + tmp2p2;
+				var tmp12p2 = tmp1p2 - tmp2p2;
+	
+				data[dataOff] = tmp10p2 + tmp11p2; /* phase 3 */
+				data[dataOff+32] = tmp10p2 - tmp11p2;
+	
+				var z1p2 = (tmp12p2 + tmp13p2) * 0.707106781; /* c4 */
+				data[dataOff+16] = tmp13p2 + z1p2; /* phase 5 */
+				data[dataOff+48] = tmp13p2 - z1p2;
+	
+				/* Odd part */
+				tmp10p2 = tmp4p2 + tmp5p2; /* phase 2 */
+				tmp11p2 = tmp5p2 + tmp6p2;
+				tmp12p2 = tmp6p2 + tmp7p2;
+	
+				/* The rotator is modified from fig 4-8 to avoid extra negations. */
+				var z5p2 = (tmp10p2 - tmp12p2) * 0.382683433; /* c6 */
+				var z2p2 = 0.541196100 * tmp10p2 + z5p2; /* c2-c6 */
+				var z4p2 = 1.306562965 * tmp12p2 + z5p2; /* c2+c6 */
+				var z3p2 = tmp11p2 * 0.707106781; /* c4 */
+	
+				var z11p2 = tmp7p2 + z3p2;	/* phase 5 */
+				var z13p2 = tmp7p2 - z3p2;
+	
+				data[dataOff+40] = z13p2 + z2p2; /* phase 6 */
+				data[dataOff+24] = z13p2 - z2p2;
+				data[dataOff+ 8] = z11p2 + z4p2;
+				data[dataOff+56] = z11p2 - z4p2;
+	
+				dataOff++; /* advance pointer to next column */
+			}
+	
+			// Quantize/descale the coefficients
+			var fDCTQuant;
+			for (i=0; i<I64; ++i)
+			{
+				// Apply the quantization and scaling factor & Round to nearest integer
+				fDCTQuant = data[i]*fdtbl[i];
+				outputfDCTQuant[i] = (fDCTQuant > 0.0) ? ((fDCTQuant + 0.5)|0) : ((fDCTQuant - 0.5)|0);
+				//outputfDCTQuant[i] = fround(fDCTQuant);
+
+			}
+			return outputfDCTQuant;
+		}
+		
+		function writeAPP0()
+		{
+			writeWord(0xFFE0); // marker
+			writeWord(16); // length
+			writeByte(0x4A); // J
+			writeByte(0x46); // F
+			writeByte(0x49); // I
+			writeByte(0x46); // F
+			writeByte(0); // = "JFIF",'\0'
+			writeByte(1); // versionhi
+			writeByte(1); // versionlo
+			writeByte(0); // xyunits
+			writeWord(1); // xdensity
+			writeWord(1); // ydensity
+			writeByte(0); // thumbnwidth
+			writeByte(0); // thumbnheight
+		}
+	
+		function writeSOF0(width, height)
+		{
+			writeWord(0xFFC0); // marker
+			writeWord(17);   // length, truecolor YUV JPG
+			writeByte(8);    // precision
+			writeWord(height);
+			writeWord(width);
+			writeByte(3);    // nrofcomponents
+			writeByte(1);    // IdY
+			writeByte(0x11); // HVY
+			writeByte(0);    // QTY
+			writeByte(2);    // IdU
+			writeByte(0x11); // HVU
+			writeByte(1);    // QTU
+			writeByte(3);    // IdV
+			writeByte(0x11); // HVV
+			writeByte(1);    // QTV
+		}
+	
+		function writeDQT()
+		{
+			writeWord(0xFFDB); // marker
+			writeWord(132);	   // length
+			writeByte(0);
+			for (var i=0; i<64; i++) {
+				writeByte(YTable[i]);
+			}
+			writeByte(1);
+			for (var j=0; j<64; j++) {
+				writeByte(UVTable[j]);
+			}
+		}
+	
+		function writeDHT()
+		{
+			writeWord(0xFFC4); // marker
+			writeWord(0x01A2); // length
+	
+			writeByte(0); // HTYDCinfo
+			for (var i=0; i<16; i++) {
+				writeByte(std_dc_luminance_nrcodes[i+1]);
+			}
+			for (var j=0; j<=11; j++) {
+				writeByte(std_dc_luminance_values[j]);
+			}
+	
+			writeByte(0x10); // HTYACinfo
+			for (var k=0; k<16; k++) {
+				writeByte(std_ac_luminance_nrcodes[k+1]);
+			}
+			for (var l=0; l<=161; l++) {
+				writeByte(std_ac_luminance_values[l]);
+			}
+	
+			writeByte(1); // HTUDCinfo
+			for (var m=0; m<16; m++) {
+				writeByte(std_dc_chrominance_nrcodes[m+1]);
+			}
+			for (var n=0; n<=11; n++) {
+				writeByte(std_dc_chrominance_values[n]);
+			}
+	
+			writeByte(0x11); // HTUACinfo
+			for (var o=0; o<16; o++) {
+				writeByte(std_ac_chrominance_nrcodes[o+1]);
+			}
+			for (var p=0; p<=161; p++) {
+				writeByte(std_ac_chrominance_values[p]);
+			}
+		}
+	
+		function writeSOS()
+		{
+			writeWord(0xFFDA); // marker
+			writeWord(12); // length
+			writeByte(3); // nrofcomponents
+			writeByte(1); // IdY
+			writeByte(0); // HTY
+			writeByte(2); // IdU
+			writeByte(0x11); // HTU
+			writeByte(3); // IdV
+			writeByte(0x11); // HTV
+			writeByte(0); // Ss
+			writeByte(0x3f); // Se
+			writeByte(0); // Bf
+		}
+		
+		function processDU(CDU, fdtbl, DC, HTDC, HTAC){
+			var EOB = HTAC[0x00];
+			var M16zeroes = HTAC[0xF0];
+			var pos;
+			const I16 = 16;
+			const I63 = 63;
+			const I64 = 64;
+			var DU_DCT = fDCTQuant(CDU, fdtbl);
+			//ZigZag reorder
+			for (var j=0;j<I64;++j) {
+				DU[ZigZag[j]]=DU_DCT[j];
+			}
+			var Diff = DU[0] - DC; DC = DU[0];
+			//Encode DC
+			if (Diff==0) {
+				writeBits(HTDC[0]); // Diff might be 0
+			} else {
+				pos = 32767+Diff;
+				writeBits(HTDC[category[pos]]);
+				writeBits(bitcode[pos]);
+			}
+			//Encode ACs
+			var end0pos = 63; // was const... which is crazy
+			for (; (end0pos>0)&&(DU[end0pos]==0); end0pos--) {};
+			//end0pos = first element in reverse order !=0
+			if ( end0pos == 0) {
+				writeBits(EOB);
+				return DC;
+			}
+			var i = 1;
+			var lng;
+			while ( i <= end0pos ) {
+				var startpos = i;
+				for (; (DU[i]==0) && (i<=end0pos); ++i) {}
+				var nrzeroes = i-startpos;
+				if ( nrzeroes >= I16 ) {
+					lng = nrzeroes>>4;
+					for (var nrmarker=1; nrmarker <= lng; ++nrmarker)
+						writeBits(M16zeroes);
+					nrzeroes = nrzeroes&0xF;
+				}
+				pos = 32767+DU[i];
+				writeBits(HTAC[(nrzeroes<<4)+category[pos]]);
+				writeBits(bitcode[pos]);
+				i++;
+			}
+			if ( end0pos != I63 ) {
+				writeBits(EOB);
+			}
+			return DC;
+		}
+
+		function initCharLookupTable(){
+			var sfcc = String.fromCharCode;
+			for(var i=0; i < 256; i++){ ///// ACHTUNG // 255
+				clt[i] = sfcc(i);
+			}
+		}
+		
+		this.encode = function(image,quality) // image data object
+		{
+			var time_start = new Date().getTime();
+			
+			if(quality) setQuality(quality);
+			
+			// Initialize bit writer
+			byteout = new Array();
+			bytenew=0;
+			bytepos=7;
+	
+			// Add JPEG headers
+			writeWord(0xFFD8); // SOI
+			writeAPP0();
+			writeDQT();
+			writeSOF0(image.width,image.height);
+			writeDHT();
+			writeSOS();
+
+	
+			// Encode 8x8 macroblocks
+			var DCY=0;
+			var DCU=0;
+			var DCV=0;
+			
+			bytenew=0;
+			bytepos=7;
+			
+			
+			this.encode.displayName = "_encode_";
+
+			var imageData = image.data;
+			var width = image.width;
+			var height = image.height;
+
+			var quadWidth = width*4;
+			var tripleWidth = width*3;
+			
+			var x, y = 0;
+			var r, g, b;
+			var start,p, col,row,pos;
+			while(y < height){
+				x = 0;
+				while(x < quadWidth){
+				start = quadWidth * y + x;
+				p = start;
+				col = -1;
+				row = 0;
+				
+				for(pos=0; pos < 64; pos++){
+					row = pos >> 3;// /8
+					col = ( pos & 7 ) * 4; // %8
+					p = start + ( row * quadWidth ) + col;		
+					
+					if(y+row >= height){ // padding bottom
+						p-= (quadWidth*(y+1+row-height));
+					}
+
+					if(x+col >= quadWidth){ // padding right	
+						p-= ((x+col) - quadWidth +4)
+					}
+					
+					r = imageData[ p++ ];
+					g = imageData[ p++ ];
+					b = imageData[ p++ ];
+					
+					
+					/* // calculate YUV values dynamically
+					YDU[pos]=((( 0.29900)*r+( 0.58700)*g+( 0.11400)*b))-128; //-0x80
+					UDU[pos]=(((-0.16874)*r+(-0.33126)*g+( 0.50000)*b));
+					VDU[pos]=((( 0.50000)*r+(-0.41869)*g+(-0.08131)*b));
+					*/
+					
+					// use lookup table (slightly faster)
+					YDU[pos] = ((RGB_YUV_TABLE[r]             + RGB_YUV_TABLE[(g +  256)>>0] + RGB_YUV_TABLE[(b +  512)>>0]) >> 16)-128;
+					UDU[pos] = ((RGB_YUV_TABLE[(r +  768)>>0] + RGB_YUV_TABLE[(g + 1024)>>0] + RGB_YUV_TABLE[(b + 1280)>>0]) >> 16)-128;
+					VDU[pos] = ((RGB_YUV_TABLE[(r + 1280)>>0] + RGB_YUV_TABLE[(g + 1536)>>0] + RGB_YUV_TABLE[(b + 1792)>>0]) >> 16)-128;
+
+				}
+				
+				DCY = processDU(YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT);
+				DCU = processDU(UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
+				DCV = processDU(VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
+				x+=32;
+				}
+				y+=8;
+			}
+			
+			
+			////////////////////////////////////////////////////////////////
+	
+			// Do the bit alignment of the EOI marker
+			if ( bytepos >= 0 ) {
+				var fillbits = [];
+				fillbits[1] = bytepos+1;
+				fillbits[0] = (1<<(bytepos+1))-1;
+				writeBits(fillbits);
+			}
+	
+			writeWord(0xFFD9); //EOI
+
+      //return new Uint8Array(byteout);
+      return new Buffer(byteout);
+
+			var jpegDataUri = 'data:image/jpeg;base64,' + btoa(byteout.join(''));
+			
+			byteout = [];
+			
+			// benchmarking
+			var duration = new Date().getTime() - time_start;
+    		//console.log('Encoding time: '+ duration + 'ms');
+    		//
+			
+			return jpegDataUri			
+	}
+	
+	function setQuality(quality){
+		if (quality <= 0) {
+			quality = 1;
+		}
+		if (quality > 100) {
+			quality = 100;
+		}
+		
+		if(currentQuality == quality) return // don't recalc if unchanged
+		
+		var sf = 0;
+		if (quality < 50) {
+			sf = Math.floor(5000 / quality);
+		} else {
+			sf = Math.floor(200 - quality*2);
+		}
+		
+		initQuantTables(sf);
+		currentQuality = quality;
+		//console.log('Quality set to: '+quality +'%');
+	}
+	
+	function init(){
+		var time_start = new Date().getTime();
+		if(!quality) quality = 50;
+		// Create tables
+		initCharLookupTable()
+		initHuffmanTbl();
+		initCategoryNumber();
+		initRGBYUVTable();
+		
+		setQuality(quality);
+		var duration = new Date().getTime() - time_start;
+    	//console.log('Initialization '+ duration + 'ms');
+	}
+	
+	init();
+	
+};
+module.exports = encode;
+
+function encode(imgData, qu) {
+  if (typeof qu === 'undefined') qu = 50;
+  var encoder = new JPEGEncoder(qu);
+	var data = encoder.encode(imgData, qu);
+  return {
+    data: data,
+    width: imgData.width,
+    height: imgData.height
+  };
+}
+
+// helper function to get the imageData of an existing image on the current page.
+function getImageDataFromImage(idOrElement){
+	var theImg = (typeof(idOrElement)=='string')? document.getElementById(idOrElement):idOrElement;
+	var cvs = document.createElement('canvas');
+	cvs.width = theImg.width;
+	cvs.height = theImg.height;
+	var ctx = cvs.getContext("2d");
+	ctx.drawImage(theImg,0,0);
+	
+	return (ctx.getImageData(0, 0, cvs.width, cvs.height));
+}

build/node_modules/jpeg-js/package.json

@@ -0,0 +1,65 @@
+{
+  "_args": [
+    [
+      "jpeg-js@0.2.0",
+      "/Users/asciidisco/Desktop/asciidisco.com/build"
+    ]
+  ],
+  "_from": "jpeg-js@0.2.0",
+  "_id": "jpeg-js@0.2.0",
+  "_inBundle": false,
+  "_integrity": "sha1-U+RI7J0mPmgyZkZ+lELSxaLvVII=",
+  "_location": "/jpeg-js",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "version",
+    "registry": true,
+    "raw": "jpeg-js@0.2.0",
+    "name": "jpeg-js",
+    "escapedName": "jpeg-js",
+    "rawSpec": "0.2.0",
+    "saveSpec": null,
+    "fetchSpec": "0.2.0"
+  },
+  "_requiredBy": [
+    "/jimp"
+  ],
+  "_resolved": "https://registry.npmjs.org/jpeg-js/-/jpeg-js-0.2.0.tgz",
+  "_spec": "0.2.0",
+  "_where": "/Users/asciidisco/Desktop/asciidisco.com/build",
+  "author": {
+    "name": "Eugene Ware",
+    "email": "eugene@noblesamurai.com"
+  },
+  "bugs": {
+    "url": "https://github.com/eugeneware/jpeg-js/issues"
+  },
+  "dependencies": {},
+  "description": "A pure javascript JPEG encoder and decoder",
+  "devDependencies": {
+    "redtape": "~0.1.0",
+    "tape": "~2.3.2"
+  },
+  "homepage": "https://github.com/eugeneware/jpeg-js#readme",
+  "keywords": [
+    "jpeg",
+    "jpg",
+    "encoder",
+    "decoder",
+    "codec",
+    "image",
+    "javascript",
+    "js"
+  ],
+  "license": "BSD-3-Clause",
+  "main": "index.js",
+  "name": "jpeg-js",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/eugeneware/jpeg-js.git"
+  },
+  "scripts": {
+    "test": "tape test/*.js"
+  },
+  "version": "0.2.0"
+}

build/node_modules/jpeg-js/test/index.js

@@ -0,0 +1,165 @@
+var redtape = require('redtape'),
+    fs = require('fs'),
+    path = require('path'),
+    jpeg = require('..');
+
+var it = redtape({
+  asserts: {
+    bufferEqual: function (a, b) {
+      if (a.length != b.length) return false;
+      for (var i = 0, len = a.length; i < len; i++) {
+        if (a[i] !== b[i]) return false;
+      }
+      return true;
+    }
+  }
+});
+
+function fixture(name) {
+  return fs.readFileSync(path.join(__dirname, 'fixtures', name));
+}
+
+it('should be able to decode a JPEG', function(t) {
+  var jpegData = fixture('grumpycat.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 320);
+  t.equal(rawImageData.height, 180);
+  var expected = fixture('grumpycat.rgba');
+  t.deepEqual(rawImageData.data, expected);
+  t.end();
+});
+
+it('should be able to decode a JPEG with RST intervals', function(t) {
+  var jpegData = fixture('redbox-with-rst.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  var expected = fixture('redbox.jpg');
+  var rawExpectedImageData = jpeg.decode(expected);
+  t.deepEqual(rawImageData.data, rawExpectedImageData.data);
+  t.end();
+});
+
+it('should be able to decode a grayscale JPEG', function(t) {
+  var jpegData = fixture('apsara.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 580);
+  t.equal(rawImageData.height, 599);
+  var expected = fixture('apsara.rgba');
+  t.deepEqual(rawImageData.data, expected);
+  t.end();
+});
+
+it('should be able to decode a CMYK jpeg with correct colors', function (t) {
+  var jpegData = fixture('tree-cmyk.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 400);
+  t.equal(rawImageData.height, 250);
+  var expected = fixture('tree-cmyk.cmyk');
+  t.deepEqual(rawImageData.data, expected);
+  t.end();
+});
+
+it('should be able to decode an RGB jpeg with correct colors', function (t) {
+  var jpegData = fixture('tree-rgb.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 400);
+  t.equal(rawImageData.height, 250);
+  var expected = fixture('tree-rgb.rgb');
+  t.deepEqual(rawImageData.data, expected);
+  t.end();
+});
+
+it('should be able to decode a greyscale CMYK jpeg with correct colors', function (t) {
+  var jpegData = fixture('cmyk-grey.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 300);
+  t.equal(rawImageData.height, 389);
+  var expected = fixture('cmyk-grey.cmyk');
+  t.deepEqual(rawImageData.data, expected);
+  t.end();
+});
+
+it('should be able to decode an adobe CMYK jpeg with correct colors', function (t) {
+  var jpegData = fixture('cmyktest.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 300);
+  t.equal(rawImageData.height, 111);
+  var expected = fixture('cmyktest.cmyk');
+  t.deepEqual(rawImageData.data, expected);
+
+  var jpegData2 = fixture('plusshelf-drawing.jpg');
+  var rawImageData2 = jpeg.decode(jpegData2);
+  t.equal(rawImageData2.width, 350);
+  t.equal(rawImageData2.height, 233);
+  var expected2 = fixture('plusshelf-drawing.cmyk');
+  t.deepEqual(rawImageData2.data, expected2);
+
+  t.end();
+});
+
+it('should be able to decode a unconventional table JPEG', function (t) {
+  var jpegData = fixture('unconventional-table.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 1920);
+  t.equal(rawImageData.height, 1200);
+  t.end();
+});
+
+it('should be able to encode a JPEG', function (t) {
+  var frameData = fixture('grumpycat.rgba');
+  var rawImageData = {
+    data: frameData,
+    width: 320,
+    height: 180
+  };
+  var jpegImageData = jpeg.encode(rawImageData, 50);
+  t.equal(jpegImageData.width, 320);
+  t.equal(jpegImageData.height, 180);
+  var expected = fixture('grumpycat-50.jpg');
+  t.deepEqual(jpegImageData.data, expected);
+  t.end();
+});
+
+it('should be able to create a JPEG from an array', function (t) {
+  var width = 320, height = 180;
+  var frameData = new Buffer(width * height * 4);
+  var i = 0;
+  while (i < frameData.length) {
+    frameData[i++] = 0xFF; // red
+    frameData[i++] = 0x00; // green
+    frameData[i++] = 0x00; // blue
+    frameData[i++] = 0xFF; // alpha - ignored in JPEGs
+  }
+  var rawImageData = {
+    data: frameData,
+    width: width,
+    height: height
+  };
+  var jpegImageData = jpeg.encode(rawImageData, 50);
+  t.equal(jpegImageData.width, width);
+  t.equal(jpegImageData.height, height);
+  var expected = fixture('redbox.jpg');
+  t.bufferEqual(jpegImageData.data, expected);
+  t.end();
+});
+
+it('should be able to decode a JPEG into a typed array', function(t) {
+  var jpegData = fixture('grumpycat.jpg');
+  var rawImageData = jpeg.decode(jpegData, true);
+  t.equal(rawImageData.width, 320);
+  t.equal(rawImageData.height, 180);
+  var expected = fixture('grumpycat.rgba');
+  t.bufferEqual(rawImageData.data, expected);
+  t.assert(rawImageData.data instanceof Uint8Array, 'data is a typed array');
+  t.end();
+});
+
+it('should be able to decode a JPEG from a typed array into a typed array', function(t) {
+  var jpegData = fixture('grumpycat.jpg');
+  var rawImageData = jpeg.decode(new Uint8Array(jpegData), true);
+  t.equal(rawImageData.width, 320);
+  t.equal(rawImageData.height, 180);
+  var expected = fixture('grumpycat.rgba');
+  t.bufferEqual(rawImageData.data, expected);
+  t.assert(rawImageData.data instanceof Uint8Array, 'data is a typed array');
+  t.end();
+});