diff --git a/lib/pnglib.js b/lib/pnglib.js
index eeac098..8525ee0 100644
--- a/lib/pnglib.js
+++ b/lib/pnglib.js
@@ -1,207 +1,206 @@
-/**
- * A handy class to calculate color values.
- *
- * @version 1.0
- * @author Robert Eisele <robert@xarg.org>
- * @copyright Copyright (c) 2010, Robert Eisele
- * @link http://www.xarg.org/2010/03/generate-client-side-png-files-using-javascript/
- * @license http://www.opensource.org/licenses/bsd-license.php BSD License
- *
- */
-
-// Modified by George Chan <gchan@21cn.com>
-
-module.exports = function(width,height,depth) {
-
-
-    // helper functions for that ctx
-    function write(buffer, offs) {
-        for (var i = 2; i < arguments.length; i++) {
-            for (var j = 0; j < arguments[i].length; j++) {
-                buffer[offs++] = arguments[i].charAt(j);
-            }
-        }
-    }
-
-    function byte2(w) {
-        return String.fromCharCode((w >> 8) & 255, w & 255);
-    }
-
-    function byte4(w) {
-        return String.fromCharCode((w >> 24) & 255, (w >> 16) & 255, (w >> 8) & 255, w & 255);
-    }
-
-    function byte2lsb(w) {
-        return String.fromCharCode(w & 255, (w >> 8) & 255);
-    }
-
-    this.width   = width;
-    this.height  = height;
-    this.depth   = depth;
-
-    // pixel data and row filter identifier size
-    this.pix_size = height * (width + 1);
-
-    // deflate header, pix_size, block headers, adler32 checksum
-    this.data_size = 2 + this.pix_size + 5 * Math.floor((0xfffe + this.pix_size) / 0xffff) + 4;
-
-    // offsets and sizes of Png chunks
-    this.ihdr_offs = 0;									// IHDR offset and size
-    this.ihdr_size = 4 + 4 + 13 + 4;
-    this.plte_offs = this.ihdr_offs + this.ihdr_size;	// PLTE offset and size
-    this.plte_size = 4 + 4 + 3 * depth + 4;
-    this.trns_offs = this.plte_offs + this.plte_size;	// tRNS offset and size
-    this.trns_size = 4 + 4 + depth + 4;
-    this.idat_offs = this.trns_offs + this.trns_size;	// IDAT offset and size
-    this.idat_size = 4 + 4 + this.data_size + 4;
-    this.iend_offs = this.idat_offs + this.idat_size;	// IEND offset and size
-    this.iend_size = 4 + 4 + 4;
-    this.buffer_size  = this.iend_offs + this.iend_size;	// total PNG size
-
-    this.buffer  = new Array();
-    this.palette = new Object();
-    this.pindex  = 0;
-
-    var _crc32 = new Array();
-
-    // initialize buffer with zero bytes
-    for (var i = 0; i < this.buffer_size; i++) {
-        this.buffer[i] = "\x00";
-    }
-
-    // initialize non-zero elements
-    write(this.buffer, this.ihdr_offs, byte4(this.ihdr_size - 12), 'IHDR', byte4(width), byte4(height), "\x08\x03");
-    write(this.buffer, this.plte_offs, byte4(this.plte_size - 12), 'PLTE');
-    write(this.buffer, this.trns_offs, byte4(this.trns_size - 12), 'tRNS');
-    write(this.buffer, this.idat_offs, byte4(this.idat_size - 12), 'IDAT');
-    write(this.buffer, this.iend_offs, byte4(this.iend_size - 12), 'IEND');
-
-    // initialize deflate header
-    var header = ((8 + (7 << 4)) << 8) | (3 << 6);
-    header+= 31 - (header % 31);
-
-    write(this.buffer, this.idat_offs + 8, byte2(header));
-
-    // initialize deflate block headers
-    for (var i = 0; (i << 16) - 1 < this.pix_size; i++) {
-        var size, bits;
-        if (i + 0xffff < this.pix_size) {
-            size = 0xffff;
-            bits = "\x00";
-        } else {
-            size = this.pix_size - (i << 16) - i;
-            bits = "\x01";
-        }
-        write(this.buffer, this.idat_offs + 8 + 2 + (i << 16) + (i << 2), bits, byte2lsb(size), byte2lsb(~size));
-    }
-
-    /* Create crc32 lookup table */
-    for (var i = 0; i < 256; i++) {
-        var c = i;
-        for (var j = 0; j < 8; j++) {
-            if (c & 1) {
-                c = -306674912 ^ ((c >> 1) & 0x7fffffff);
-            } else {
-                c = (c >> 1) & 0x7fffffff;
-            }
-        }
-        _crc32[i] = c;
-    }
-
-    // compute the index into a png for a given pixel
-    this.index = function(x,y) {
-        var i = y * (this.width + 1) + x + 1;
-        var j = this.idat_offs + 8 + 2 + 5 * Math.floor((i / 0xffff) + 1) + i;
-        return j;
-    }
-
-    // convert a color and build up the palette
-    this.color = function(red, green, blue, alpha) {
-
-        alpha = alpha >= 0 ? alpha : 255;
-        var color = (((((alpha << 8) | red) << 8) | green) << 8) | blue;
-
-        if (typeof this.palette[color] == "undefined") {
-            if (this.pindex == this.depth) return "\x00";
-
-            var ndx = this.plte_offs + 8 + 3 * this.pindex;
-
-            this.buffer[ndx + 0] = String.fromCharCode(red);
-            this.buffer[ndx + 1] = String.fromCharCode(green);
-            this.buffer[ndx + 2] = String.fromCharCode(blue);
-            this.buffer[this.trns_offs+8+this.pindex] = String.fromCharCode(alpha);
-
-            this.palette[color] = String.fromCharCode(this.pindex++);
-        }
-        return this.palette[color];
-    }
-
-    // output a PNG string, Base64 encoded
-    this.getBase64 = function() {
-
-        var s = this.getDump();
-
-        var ch = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-        var c1, c2, c3, e1, e2, e3, e4;
-        var l = s.length;
-        var i = 0;
-        var r = "";
-
-        do {
-            c1 = s.charCodeAt(i);
-            e1 = c1 >> 2;
-            c2 = s.charCodeAt(i+1);
-            e2 = ((c1 & 3) << 4) | (c2 >> 4);
-            c3 = s.charCodeAt(i+2);
-            if (l < i+2) { e3 = 64; } else { e3 = ((c2 & 0xf) << 2) | (c3 >> 6); }
-            if (l < i+3) { e4 = 64; } else { e4 = c3 & 0x3f; }
-            r+= ch.charAt(e1) + ch.charAt(e2) + ch.charAt(e3) + ch.charAt(e4);
-        } while ((i+= 3) < l);
-        return r;
-    }
-
-    // output a PNG string
-    this.getDump = function() {
-
-        // compute adler32 of output pixels + row filter bytes
-        var BASE = 65521; /* largest prime smaller than 65536 */
-        var NMAX = 5552;  /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
-        var s1 = 1;
-        var s2 = 0;
-        var n = NMAX;
-
-        for (var y = 0; y < this.height; y++) {
-            for (var x = -1; x < this.width; x++) {
-                s1+= this.buffer[this.index(x, y)].charCodeAt(0);
-                s2+= s1;
-                if ((n-= 1) == 0) {
-                    s1%= BASE;
-                    s2%= BASE;
-                    n = NMAX;
-                }
-            }
-        }
-        s1%= BASE;
-        s2%= BASE;
-        write(this.buffer, this.idat_offs + this.idat_size - 8, byte4((s2 << 16) | s1));
-
-        // compute crc32 of the PNG chunks
-        function crc32(png, offs, size) {
-            var crc = -1;
-            for (var i = 4; i < size-4; i += 1) {
-                crc = _crc32[(crc ^ png[offs+i].charCodeAt(0)) & 0xff] ^ ((crc >> 8) & 0x00ffffff);
-            }
-            write(png, offs+size-4, byte4(crc ^ -1));
-        }
-
-        crc32(this.buffer, this.ihdr_offs, this.ihdr_size);
-        crc32(this.buffer, this.plte_offs, this.plte_size);
-        crc32(this.buffer, this.trns_offs, this.trns_size);
-        crc32(this.buffer, this.idat_offs, this.idat_size);
-        crc32(this.buffer, this.iend_offs, this.iend_size);
-
-        // convert PNG to string
-        return "\211PNG\r\n\032\n"+this.buffer.join('');
-    }
-};
-
+/**
+ * A handy class to calculate color values.
+ *
+ * @version 1.0
+ * @author Robert Eisele <robert@xarg.org>
+ * @copyright Copyright (c) 2010, Robert Eisele
+ * @link http://www.xarg.org/2010/03/generate-client-side-png-files-using-javascript/
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ *
+ */
+
+// Modified by George Chan <gchan@21cn.com>
+
+module.exports = function(width,height,depth) {
+
+    // helper functions for that ctx
+    function write(buffer, offs) {
+        for (var i = 2; i < arguments.length; i++) {
+            for (var j = 0; j < arguments[i].length; j++) {
+                buffer[offs++] = arguments[i].charAt(j);
+            }
+        }
+    }
+
+    function byte2(w) {
+        return String.fromCharCode((w >> 8) & 255, w & 255);
+    }
+
+    function byte4(w) {
+        return String.fromCharCode((w >> 24) & 255, (w >> 16) & 255, (w >> 8) & 255, w & 255);
+    }
+
+    function byte2lsb(w) {
+        return String.fromCharCode(w & 255, (w >> 8) & 255);
+    }
+
+    this.width   = width;
+    this.height  = height;
+    this.depth   = depth;
+
+    // pixel data and row filter identifier size
+    this.pix_size = height * (width + 1);
+
+    // deflate header, pix_size, block headers, adler32 checksum
+    this.data_size = 2 + this.pix_size + 5 * Math.floor((0xfffe + this.pix_size) / 0xffff) + 4;
+
+    // offsets and sizes of Png chunks
+    this.ihdr_offs = 0;									// IHDR offset and size
+    this.ihdr_size = 4 + 4 + 13 + 4;
+    this.plte_offs = this.ihdr_offs + this.ihdr_size;	// PLTE offset and size
+    this.plte_size = 4 + 4 + 3 * depth + 4;
+    this.trns_offs = this.plte_offs + this.plte_size;	// tRNS offset and size
+    this.trns_size = 4 + 4 + depth + 4;
+    this.idat_offs = this.trns_offs + this.trns_size;	// IDAT offset and size
+    this.idat_size = 4 + 4 + this.data_size + 4;
+    this.iend_offs = this.idat_offs + this.idat_size;	// IEND offset and size
+    this.iend_size = 4 + 4 + 4;
+    this.buffer_size  = this.iend_offs + this.iend_size;	// total PNG size
+
+    this.buffer  = new Array();
+    this.palette = new Object();
+    this.pindex  = 0;
+
+    var _crc32 = new Array();
+
+    // initialize buffer with zero bytes
+    for (var i = 0; i < this.buffer_size; i++) {
+        this.buffer[i] = "\x00";
+    }
+
+    // initialize non-zero elements
+    write(this.buffer, this.ihdr_offs, byte4(this.ihdr_size - 12), 'IHDR', byte4(width), byte4(height), "\x08\x03");
+    write(this.buffer, this.plte_offs, byte4(this.plte_size - 12), 'PLTE');
+    write(this.buffer, this.trns_offs, byte4(this.trns_size - 12), 'tRNS');
+    write(this.buffer, this.idat_offs, byte4(this.idat_size - 12), 'IDAT');
+    write(this.buffer, this.iend_offs, byte4(this.iend_size - 12), 'IEND');
+
+    // initialize deflate header
+    var header = ((8 + (7 << 4)) << 8) | (3 << 6);
+    header+= 31 - (header % 31);
+
+    write(this.buffer, this.idat_offs + 8, byte2(header));
+
+    // initialize deflate block headers
+    for (var i = 0; (i << 16) - 1 < this.pix_size; i++) {
+        var size, bits;
+        if (i + 0xffff < this.pix_size) {
+            size = 0xffff;
+            bits = "\x00";
+        } else {
+            size = this.pix_size - (i << 16) - i;
+            bits = "\x01";
+        }
+        write(this.buffer, this.idat_offs + 8 + 2 + (i << 16) + (i << 2), bits, byte2lsb(size), byte2lsb(~size));
+    }
+
+    /* Create crc32 lookup table */
+    for (var i = 0; i < 256; i++) {
+        var c = i;
+        for (var j = 0; j < 8; j++) {
+            if (c & 1) {
+                c = -306674912 ^ ((c >> 1) & 0x7fffffff);
+            } else {
+                c = (c >> 1) & 0x7fffffff;
+            }
+        }
+        _crc32[i] = c;
+    }
+
+    // compute the index into a png for a given pixel
+    this.index = function(x,y) {
+        var i = y * (this.width + 1) + x + 1;
+        var j = this.idat_offs + 8 + 2 + 5 * Math.floor((i / 0xffff) + 1) + i;
+        return j;
+    }
+
+    // convert a color and build up the palette
+    this.color = function(red, green, blue, alpha) {
+
+        alpha = alpha >= 0 ? alpha : 255;
+        var color = (((((alpha << 8) | red) << 8) | green) << 8) | blue;
+
+        if (typeof this.palette[color] == "undefined") {
+            if (this.pindex == this.depth) return "\x00";
+
+            var ndx = this.plte_offs + 8 + 3 * this.pindex;
+
+            this.buffer[ndx + 0] = String.fromCharCode(red);
+            this.buffer[ndx + 1] = String.fromCharCode(green);
+            this.buffer[ndx + 2] = String.fromCharCode(blue);
+            this.buffer[this.trns_offs+8+this.pindex] = String.fromCharCode(alpha);
+
+            this.palette[color] = String.fromCharCode(this.pindex++);
+        }
+        return this.palette[color];
+    }
+
+    // output a PNG string, Base64 encoded
+    this.getBase64 = function() {
+
+        var s = this.getDump();
+
+        var ch = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+        var c1, c2, c3, e1, e2, e3, e4;
+        var l = s.length;
+        var i = 0;
+        var r = "";
+
+        do {
+            c1 = s.charCodeAt(i);
+            e1 = c1 >> 2;
+            c2 = s.charCodeAt(i+1);
+            e2 = ((c1 & 3) << 4) | (c2 >> 4);
+            c3 = s.charCodeAt(i+2);
+            if (l < i+2) { e3 = 64; } else { e3 = ((c2 & 0xf) << 2) | (c3 >> 6); }
+            if (l < i+3) { e4 = 64; } else { e4 = c3 & 0x3f; }
+            r+= ch.charAt(e1) + ch.charAt(e2) + ch.charAt(e3) + ch.charAt(e4);
+        } while ((i+= 3) < l);
+        return r;
+    }
+
+    // output a PNG string
+    this.getDump = function() {
+
+        // compute adler32 of output pixels + row filter bytes
+        var BASE = 65521; /* largest prime smaller than 65536 */
+        var NMAX = 5552;  /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
+        var s1 = 1;
+        var s2 = 0;
+        var n = NMAX;
+
+        for (var y = 0; y < this.height; y++) {
+            for (var x = -1; x < this.width; x++) {
+                s1+= this.buffer[this.index(x, y)].charCodeAt(0);
+                s2+= s1;
+                if ((n-= 1) == 0) {
+                    s1%= BASE;
+                    s2%= BASE;
+                    n = NMAX;
+                }
+            }
+        }
+        s1%= BASE;
+        s2%= BASE;
+        write(this.buffer, this.idat_offs + this.idat_size - 8, byte4((s2 << 16) | s1));
+
+        // compute crc32 of the PNG chunks
+        function crc32(png, offs, size) {
+            var crc = -1;
+            for (var i = 4; i < size-4; i += 1) {
+                crc = _crc32[(crc ^ png[offs+i].charCodeAt(0)) & 0xff] ^ ((crc >> 8) & 0x00ffffff);
+            }
+            write(png, offs+size-4, byte4(crc ^ -1));
+        }
+
+        crc32(this.buffer, this.ihdr_offs, this.ihdr_size);
+        crc32(this.buffer, this.plte_offs, this.plte_size);
+        crc32(this.buffer, this.trns_offs, this.trns_size);
+        crc32(this.buffer, this.idat_offs, this.idat_size);
+        crc32(this.buffer, this.iend_offs, this.iend_size);
+
+        // convert PNG to string
+        return "\u0089PNG\r\n\001a\n"+this.buffer.join('');
+    }
+};
+
diff --git a/package.json b/package.json
index 414b744..37c681c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pnglib",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "description": "A PNG lib for Node.js",
   "author": {
     "name": "George Chan"