From 037a0ae8072217f7821549bbdfe030e73289330d Mon Sep 17 00:00:00 2001
From: Julie Lala <jules@okfoc.us>
Date: Tue, 10 Dec 2013 00:47:36 -0500
Subject: dither stuff

---
 gif.js | 1690 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1690 insertions(+)
 create mode 100644 gif.js

(limited to 'gif.js')

diff --git a/gif.js b/gif.js
new file mode 100644
index 0000000..a2c22fa
--- /dev/null
+++ b/gif.js
@@ -0,0 +1,1690 @@
+// gif.js by @timb :)
+;(function(e,t,n,r){function i(r){if(!n[r]){if(!t[r]){if(e)return e(r);throw new Error("Cannot find module '"+r+"'")}var s=n[r]={exports:{}};t[r][0](function(e){var n=t[r][1][e];return i(n?n:e)},s,s.exports)}return n[r].exports}for(var s=0;s<r.length;s++)i(r[s]);return i})(typeof require!=="undefined"&&require,{1:[function(require,module,exports){var Benchmark = require('../../benchmark');
+var Tube = require('../../tube');
+var BufferLoader = require('../../bufferloader');
+
+var decode = require('./decode');
+var render = require('./render-canvas');
+
+var GIF = function(src, opts){
+
+  var gif = Object.create(GIF.proto);
+
+  gif.buf = {}; // buffers used to store binary data
+  gif.tube = Tube();
+  gif.benchmark = Benchmark();
+
+  if (src instanceof File){
+    gif.src = src;
+  }
+  else if (typeof src === 'string'){ // url
+    gif.src = src;
+  }
+  
+  return gif;
+
+};
+
+
+/*
+states:
+empty
+buffering: fetching a resource (File, url) into an ArrayBuffer
+decoding: decode binary data into different data chunks
+rendering: render data into frames as canvas contexts, or into a texture for webgl, etc
+*/
+
+GIF.proto = {};
+
+GIF.setupBuffers = function(gif, abuf){
+  gif.buf.cursor = 0;
+  gif.buf.abuf = abuf;
+  gif.buf.u8 = new Uint8Array(abuf);
+  gif.buf.dv = new DataView(abuf);
+};
+
+GIF.proto.on = function(){ var gif = this;
+  gif.tube.on.apply(gif.tube, arguments)
+};
+GIF.proto.off = function(){ var gif = this;
+  gif.tube.off.apply(gif.tube, arguments)
+};
+
+GIF.proto.load = function(){ var gif = this;
+  // if (!gif.src) throw new Error('gif needs a src');
+
+  gif.loader = BufferLoader(gif.src, {benchmark: gif.benchmark});
+  gif.loader.on("load", function(abuf){ 
+    GIF.setupBuffers(gif, abuf)
+    gif.loaded = true;
+    gif.tube("loaded")
+  });
+  gif.loader.on("error", function(e, xhr){ gif.tube("error", e, xhr)} );
+  gif.loader.load();
+
+};
+
+GIF.proto.decode = function(){ var gif = this;
+
+  if (!gif.loaded) {
+    gif.on("loaded", gif.decode.bind(gif)) // ugh
+    gif.load();
+    return gif
+  }
+
+  // TODO: deal with
+  gif.extensions = [];
+  gif.frames = [];
+  //gif.cursor = 0;
+
+  decode(gif);
+  
+};
+
+GIF.proto.render = function(){ var gif = this;
+  if (!gif.decoded){
+    gif.on("decoded", gif.render.bind(gif)) // ugh
+    gif.decode();
+    return gif
+  }
+
+  render(gif);
+
+};
+
+
+if (typeof modules !== "undefined") modules.exports = GIF;
+if (typeof window !== "undefined") window.GIF = GIF;
+},{"../../benchmark":2,"../../tube":3,"../../bufferloader":4,"./decode":5,"./render-canvas":6}],2:[function(require,module,exports){// var b = Benchmark();
+// b.start("something") // start a timer named "something"
+// b.stop("something") // stop it
+// b.something <-- time it took between start and stop calls in ms
+// b.total <--- total ms of all benchmarks
+
+var Benchmark = function(){
+  var b = Object.create(Benchmark.proto);
+  b.total = 0;
+  return b;
+};
+Benchmark.proto = {};
+Benchmark.proto.start = function(name){
+  this[name+"_start_timestamp"] = Date.now();
+};
+Benchmark.proto.stop = function(name){
+  if (!this[name+"_start_timestamp"]) return;
+  var val = Date.now() - this[name+"_start_timestamp"];
+  delete this[name+"_start_timestamp"];
+  this[name] = val + (this[name] || 0);
+  this.total += val;
+};
+
+module.exports = Benchmark;
+
+// export Benchmark;
+},{}],3:[function(require,module,exports){var setproto = require('./object/setproto');
+var tokenize = require('./string/tokenize');
+var globber = require('./string/globber');
+var Uid = require('./uid');
+var nextTick = require('./nexttick');
+
+  // import queueOrNextTick from 'lib/nexttick4';
+
+var globcache = {};
+
+var Tube = function(opts){
+
+  opts = opts || {};
+
+  if (opts.queue){
+    var c = function(){
+      var args = arguments;
+      // queueOrNextTick (function(){ c.send.apply(c, args) });
+      nextTick (function(){ c.send.apply(c, args) });
+      return c;
+    };
+  } else {
+    var c = function(){
+      c.send.apply(c, arguments);
+      return c;
+    };
+  }
+
+  setproto(c, Tube.proto);
+  
+  c.listeners = {};
+  c.globListeners = {};
+
+  return c;
+};
+
+Tube.total = {};
+
+Tube.proto = {};
+
+
+/*
+adds fns as listeners to a channel
+
+on("msg", fn, {opts})
+on("msg", [fn, fn2], {opts})
+on("msg msg2 msg3", fn, {opts})
+on({"msg": fn, "msg2": fn2}, {opts})
+*/
+Tube.proto.on = function(){ var chan = this;
+
+  if (typeof arguments[0] === "string") { 
+  //if (arguments.length > 1) {           // on("msg", f)
+    var msgMap = {};
+    msgMap[arguments[0]] = arguments[1];
+    var opts = arguments[2] || {};
+  } else {                              // on({"msg": f, ...})
+    var msgMap = arguments[0];
+    var opts = arguments[1] || {};
+  }
+
+  for (var string in msgMap){
+    
+    var msgs = string.split(" ");
+
+    var fs = msgMap[string];
+    if (!Array.isArray(fs)) fs = [fs];
+
+    for(var i=0, f; f=fs[i]; i++){
+      if (!f.uid) f.uid = Uid();
+    }
+
+    for(var i=0, msg; msg=msgs[i]; i++){
+
+      var listeners = (msg.indexOf("*") === -1) ?
+                        chan.listeners :
+                        chan.globListeners;
+
+      // todo: this probably wastes a lot of memory?
+      // make a copy of the listener, add to it, and replace the listener
+      // why not just push directly?
+      // send might be iterating over it... and that will fuck up the iteration
+      listeners[msg] = (msg in listeners) ?
+                         listeners[msg].concat(fs) :
+                         fs.concat();
+    }
+  }
+
+  return chan;
+
+};
+
+
+
+/*
+off()
+off("a:b:c")
+off(f)
+off("a:b:c", f)
+off("a:b:c d:e:f")
+off([f, f2])
+off({"a": f, "b": f2})
+*/
+Tube.proto.off = function(){ var chan = this;
+
+  var listeners, i, msgs, msg;
+
+  // off() : delete all listeners. but replace, instead of delete
+  if (arguments.length === 0) { 
+    chan.listeners = {};
+    chan.globListeners = {};
+    return chan;
+  }
+
+  // off("a:b:c d:e:f")
+  // remove all matching listeners
+  if (arguments.length === 1 && typeof arguments[0] === "string"){
+    // question... will this fuck up send if we delete in the middle of it dispatching?
+    msgs = arguments[0].split(" ");
+
+    for (i=0; msg=msgs[i]; i++){
+      delete chan.listeners[msg];
+      delete chan.globListeners[msg];
+    }
+    return chan;
+  }
+
+  // off(f) or off([f, f2])
+  // remove all matching functions
+  if (typeof arguments[0] === "function" || Array.isArray(arguments[0])) {
+    var fs = (typeof arguments[0] === "function") ? 
+               [arguments[0]] :
+               arguments[0];
+    // TODO
+    return chan;
+  }
+
+  // off("a:b:c", f) or off({"a": f, "b": f2})
+  if (arguments.length > 1) {           // off("msg", f)
+    var msgMap = {};
+    msgMap[arguments[0]] = arguments[1];
+  } else {                              // off({"msg": f, ...})
+    var msgMap = arguments[0];
+  }
+  
+  for (var string in msgMap){
+    msgs = string.split(" ");
+
+    var fs = msgMap[string];
+    if (typeof fs === "function") fs = [fs];
+
+    for(var i=0; msg=msgs[i]; i++){
+
+      if (msg in chan.listeners)
+        listeners = chan.listeners;
+      else if (msg in chan.globListeners)
+        listeners = chan.globListeners;
+      else
+        continue;
+
+      // gotta do this carefully in case we are still iterating through the listener in send
+      // build a new array and assign it to the property, instead of mutating it.
+
+      // console.log(" length of listeners[" + msg + "]: " + listeners[msg].length)
+      // console.log(listeners[msg].join(","));
+      // console.log(fs.join(","));
+
+      listeners[msg] = listeners[msg].filter(
+                         function(f){ return fs.indexOf(f) === -1 }
+                       );
+      // console.log(" length of listeners[" + msg + "]: " + listeners[msg].length)
+
+    }
+  }
+
+  return chan;
+
+};
+
+
+/*
+
+c = Tube()
+c.on("foo", fn)
+c("foo", "bar", [])
+
+will call fn("bar", [], "foo")
+
+*/
+Tube.proto.send = function(msgString /*, data... */){
+
+  // todo: don't do this?
+  if (!Tube.total[msgString]) Tube.total[msgString] = 0
+  Tube.total[msgString]+=1;
+
+  var listener,
+      listeners = this.listeners,
+      globListeners = this.globListeners,
+      //args = Array.prototype.splice.call(arguments, 1),
+      msgs = tokenize(msgString),
+      msg, f;
+
+  if (arguments.length) {
+    var args = Array.prototype.splice.call(arguments, 1);
+    args.push(msgString);
+
+  } else {
+    var args = [];
+  }
+
+  for (var m=0; msg=msgs[m]; m++){
+
+    var fsToRun = [];
+    var uidKeyFnValue = {};
+    var uidKeyMsgStringValue = {};
+
+    // note this will die on errors
+    // todo: implement http://dean.edwards.name/weblog/2009/03/callbacks-vs-events/
+    // exact matches
+    if (listener = listeners[msg]) {
+      for (var i=0; f=listener[i]; i++){
+          // fsToRun.push([f, msg]);
+        uidKeyFnValue[f.uid] = f;
+        uidKeyMsgStringValue[f.uid] = msg;
+      }
+    }
+
+    // glob matches
+    var msgSplit = msg.split(":");
+
+    for (var pattern in globListeners){
+
+      if (pattern !== "*") { // * always matches
+        var patternSplit = globcache[pattern] || (globcache[pattern] = pattern.split(":"));
+        if (!globber(patternSplit, msgSplit)) continue;
+      }
+
+      listener = globListeners[pattern];
+
+      for (var i=0; f=listener[i]; i++){
+        //f.apply(window, args); // hm possibly pass the actual message to the func
+        // fsToRun.push([f, msg]);
+        uidKeyFnValue[f.uid] = f;
+        uidKeyMsgStringValue[f.uid] = msg;
+      }
+    }
+
+    var fns = [];
+    for (var f in uidKeyFnValue) fns.push(uidKeyFnValue[f]);
+
+    for (var i=0, f; f=fns[i]; i++)
+      f.apply(f, args);
+
+  }
+
+  return this;
+
+};
+
+module.exports = Tube;
+},{"./object/setproto":7,"./string/tokenize":8,"./string/globber":9,"./uid":10,"./nexttick":11}],7:[function(require,module,exports){// TODO: replace all uses of
+// setproto(foo, proto)
+// with
+// foo.__proto__ = proto
+// when IE is no longer shit
+
+var setproto = function(obj, proto){
+  if (obj.__proto__)
+    obj.__proto__ = proto;
+  else
+    for (var key in proto)
+      obj[key] = proto[key];
+};
+module.exports = setproto;
+},{}],8:[function(require,module,exports){// trimmed string into array of strings
+var tokenize = function(str, splitOn){
+  return str
+           .trim()
+           .split(splitOn || tokenize.default);
+};
+tokenize.default = /\s+/g;
+
+module.exports = tokenize;
+},{}],9:[function(require,module,exports){// can use * to match 0 or more : separated msgs
+// globber("*".split(":"), "a:b:c".split(":")) => true
+// globber("*:c".split(":"), "a:b:c".split(":")) => true
+// globber("a:*".split(":"), "a:b:c".split(":")) => true
+// globber("a:*:c".split(":"), "a:b:c".split(":")) => true
+
+// based on codegolf.stackexchange.com/questions/467/implement-glob-matcher
+var globber = function(patterns, strings) {
+  // console.log("globber called with: " + patterns.join(":"), strings.join(":"))
+  var first = patterns[0],
+      rest = patterns.slice(1),
+      len = strings.length,
+      matchFound;
+
+  if(first === '*') { 
+    for(var i = 0; i <= len; ++i) {
+      // console.log("* " + i + " trying " + rest.join(":") + " with " + strings.slice(i).join(":"))
+      if(globber(rest, strings.slice(i))) return true;
+    }
+    return false;
+  } else { 
+    matchFound = (first === strings[0]);
+    // console.log ("literal matching " + first + " " + strings[0] + " " + !!matched)
+  }
+
+  return matchFound && ((!rest.length && !len) || globber(rest, strings.slice(1)));
+};
+module.exports = globber;
+},{}],10:[function(require,module,exports){var Uid = function(){
+  return (Uid.counter++ + "");
+}
+
+Uid.counter = 1;
+
+module.exports = Uid;
+},{}],11:[function(require,module,exports){// based on https://github.com/timoxley/next-tick/blob/master/index.js
+
+// postMessage behaves badly on IE8
+if (window.ActiveXObject || !window.postMessage) {
+
+  var nextTick = function(fn) {
+    setTimeout(fn, 0);
+  }
+
+} else {
+
+  // based on setZeroTimeout by David Baron
+  // - http://dbaron.org/log/20100309-faster-timeouts
+  var timeouts = []
+    , name = 'next-tick-zero-timeout'
+
+  window.addEventListener('message', function(e){
+    if (e.source == window && e.data == name) {
+      if (e.stopPropagation) e.stopPropagation();
+      if (timeouts.length) timeouts.shift()();
+    }
+  }, true);
+
+  var nextTick = function(fn){
+    timeouts.push(fn);
+    window.postMessage(name, '*');
+  }
+
+}
+
+module.exports = nextTick;
+},{}],4:[function(require,module,exports){var Benchmark = require('./benchmark');
+var setproto = require('./object/setproto');
+var extend = require('./object/extend');
+var Tube = require('./tube');
+
+// usage: Buffer(url || File || ArrayBuffer)
+var BufferLoader = function(src, opts){
+
+  var loader = Tube();
+  setproto(loader, BufferLoader.proto);
+
+  if (opts && opts.benchmark) loader.benchmark = opts.benchmark;
+
+  //buf.remember("load error")
+  // loader.on("load", function(abuf){ setupBuffer(loader, abuf) }); // <-- hm, needs ref to buf
+
+  loader.src = src;
+
+  return loader;
+}
+
+BufferLoader.proto = {};
+extend(BufferLoader.proto, Tube.proto);
+
+BufferLoader.proto.load = function(){ var loader = this;
+  var src = loader.src;
+  if (typeof src === "string") loader.loadFromUrl(src)
+  else if (src instanceof File) loader.loadFromFile(src);
+  else if (src instanceof ArrayBuffer) loader("load", src);
+}
+
+BufferLoader.proto.loadFromFile = function(file){ var loader = this;
+
+  var r = new FileReader();
+  
+  r.addEventListener('load', function(e){
+    if (loader.benchmark) loader.benchmark.stop("fetch-from-disk");
+    loader('load', r.result, e);
+    // console.log(r.file.name + " 100%: " + r.result.byteLength + " bytes")
+  });
+
+  r.addEventListener('error', function(e){
+    // console.log(arguments);
+    loader('error', e, r)
+  });
+
+  r.addEventListener('progress', function(e){ 
+    //console.log(r.file.name + " " + (e.loaded / e.total * 100) + "%: " + e.loaded + " bytes") 
+    loader('progress', e)
+  });
+
+  if (loader.benchmark) loader.benchmark.start("fetch-from-disk");
+  r.readAsArrayBuffer(file);
+
+};
+
+
+BufferLoader.proto.loadFromUrl = function(url){ var loader=this;
+
+  var xhr = new XMLHttpRequest();
+  xhr.open("GET", url);
+  xhr.responseType = "arraybuffer";
+
+  xhr.addEventListener('load', function(e){
+    if (loader.benchmark) loader.benchmark.stop("fetch-from-network");
+    // console.log(r.file.name + " 100%: " + r.result.byteLength + " bytes")
+    loader('load', xhr.response, e);
+  });
+
+  xhr.addEventListener('error', function(e){
+    // console.log(arguments);
+    loader('error', e, xhr);
+  });
+
+  xhr.addEventListener('progress', function(e){ 
+    //console.log(r.file.name + " " + (e.loaded / e.total * 100) + "%: " + e.loaded + " bytes") 
+    loader('progress', e)
+  });
+
+  if (loader.benchmark) loader.benchmark.start("fetch-from-network");
+  // xhr.open("GET", url); 
+  
+  xhr.send();
+
+};
+
+module.exports = BufferLoader;
+},{"./benchmark":2,"./object/setproto":7,"./object/extend":12,"./tube":3}],12:[function(require,module,exports){module.exports = function(destination, source) {
+  for (var property in source)
+    destination[property] = source[property];
+  return destination;
+};
+},{}],5:[function(require,module,exports){(function(){var blockSigs = require('./spec').blockSigs;
+var extSigs = require('./spec').extSigs;
+var palette = require('./palette');
+var makeCurrentFrame =  require('./animate').makeCurrentFrame;
+
+var BinarySpecReader = require('../../binaryspec');
+var spec = require('./spec').spec;
+var specReader = BinarySpecReader(spec);
+
+var decode = function(gif, opts){
+  decodeNextPart(gif);
+};
+
+
+// this gets called when more binary data is ready to process
+// it gets set as BufferedReader's onload function
+/*
+var moreDataInBufferEvent = function(gif){
+  if (gif.waitingForFileBuffer) decodeNextPart(gif);
+};
+*/
+
+/*
+loads the next part of the gif, eventually calling the gif's onload function when every part has been loaded
+
+this function gets called when a previous part has finished loading, 
+and when there's more data in the buffered reader
+
+if the next part has a fixed size according to spec, we know whether we have to wait on the buffer to fill or not
+if the next part has a variable size, call the howToDecode function which will try to load it
+*/
+var decodeNextPart = function(gif, nextPart){
+  //gif.waitingForFileBuffer = false;
+
+  nextPart = nextPart || "header";
+  var buf = gif.buf;
+
+  while (nextPart !== "done" && nextPart !== "error"){
+
+    if (nextPart in howToDecode && typeof howToDecode[nextPart] === "function") { // dont know size
+      nextPart = howToDecode[nextPart](gif);
+    } else { // we know exact size of next part
+
+      var partSize = specReader.parts[nextPart].byteSize;
+
+      if (buf.abuf.byteLength < partSize + buf.cursor){
+        gif.waitingForFileBuffer = true;
+        return;
+      } else {
+        var fields = specReader.decodeBinaryFieldsToJSON(nextPart, buf.cursor, buf);
+        buf.cursor += specReader.parts[nextPart].byteSize;
+        nextPart = handleLoadedPart[nextPart](gif, fields);
+      }
+    }
+    // todo: maybe do this when and return unknown from dataBlock read
+    // if (nextPart === "unknown") nextPart = "dataBlock"
+
+  }
+
+  if (nextPart === "done"){
+    // create palette from all frames' palettes
+
+    if (gif.benchmark) gif.benchmark.start("palette");
+    gif.paletteTotal = palette.create(gif);
+    if (gif.benchmark) gif.benchmark.stop("palette");
+
+    // todo: move elsewhere
+    makeCurrentFrame.bind(gif)();
+//    GIF.decode.doneDecodingCleanup(gif);
+    //gif.tube("progress", "done");
+    gif.decoded = true;
+    gif.tube("decoded");
+    return;
+  }
+  
+};
+
+
+var howToDecode = {
+  "globalPalette": function(gif){ var buf = gif.buf;
+    var paletteSize = gif.paletteSize * 3; // r,g,b bytes
+
+    if (buf.abuf.byteLength < buf.cursor + paletteSize) {
+      gif.waitingForFileBuffer = true;
+      return;
+    }
+
+    //gif.palette = GIF.palette.binary2rgba(gif.reader.buffer.slice(gif.cursor, gif.cursor + paletteSize));
+    gif.palette = palette.binary2rgba(new Uint8Array(buf.abuf, buf.cursor, paletteSize));
+    buf.cursor += paletteSize;
+
+    return "dataBlock";
+  },
+  "localPalette": function(gif){ var buf = gif.buf;
+    var paletteSize = gif.frames[gif.frames.length - 1].paletteSize * 3; // r,g,b bytes
+
+    if (buf.abuf.byteLength < buf.cursor + paletteSize) {
+      gif.waitingForFileBuffer = true;
+      return;
+    }
+
+    gif.frames[gif.frames.length - 1].palette = palette.binary2rgba(new Uint8Array(buf.abuf, buf.cursor, paletteSize));
+    buf.cursor += paletteSize;
+    return "imageData";
+  },
+  "dataBlock": function(gif){ var buf = gif.buf;
+
+    if (buf.abuf.byteLength < buf.cursor + 1) {
+      gif.waitingForFileBuffer = true;
+      return;
+    }
+
+    var blockType = "unknown",
+        extType = "unknown",
+        nextPart;
+
+    var blockSig = buf.u8[buf.cursor];
+    
+    if (blockSig in blockSigs) {
+      blockType = blockSigs[blockSig];
+    } else {
+      //console.log("unknown data block type ("+ Number(blockSig).toString(16) +")!");
+      nextPart = "done";
+    }
+
+    if (blockType === "extension"){ // we need to determine what kind of extension the block is
+      // need next two bytes to find out what kind of extension the data block is
+      if (buf.abuf.byteLength < buf.cursor + 2) {
+        gif.waitingForFileBuffer = true;
+        return;
+        console.log("ran out of buffer")
+      }
+      var extSig = buf.u8[buf.cursor+1];
+      if (extSig in extSigs) {
+        extType = extSigs[extSig];
+        nextPart = extType;
+      } else { 
+        //console.log("unknown extension type ("+ Number(extSig).toString(16) +")")
+        nextPart = "done";
+      }
+    } else {
+      if (blockType === "unknown") { blockType = "dataBlock"; buf.cursor += 1 }
+      nextPart = blockType;
+    }
+
+    return nextPart;
+
+  },
+  "trailer": function(gif){
+    return "done";
+  }
+};
+
+var handleLoadedPart = {
+  "header": function(gif, fields){
+
+    if (fields.signature != "GIF"){
+      gif.tube("error", "file doesn't seem to be a gif (file signature: '"+fields.signature+"')");
+      return "error";
+    }
+
+    // gif.version = fields.version
+      
+    return "screenDesc";
+  },
+  "screenDesc": function(gif, fields){
+    for (var field in fields) gif[field] = fields[field];
+    // todo: make nicer
+    // this should be a u3 not this bit[3] bit-shifted horseshit 
+    gif.paletteSize = (gif.paletteSize[0] << 2) + (gif.paletteSize[1] << 1) + (gif.paletteSize[2]);
+    gif.paletteSize = Math.pow(2, gif.paletteSize + 1)
+
+    if (gif.paletteExists) return "globalPalette";
+    else return "dataBlock";
+  },
+  "imageDesc": function(gif, fields){
+    // make a blank image frame if none exists or the last frame already has image data
+    // we don't know if a blank frame has already been created because a graphic control block might
+    // have come before this block and made one
+    if (!gif.frames.length || ("w" in gif.frames[gif.frames.length - 1]))
+      gif.frames.push({})
+    
+    var frame = gif.frames[gif.frames.length - 1]
+
+    for (var field in fields) frame[field] = fields[field];
+    frame.paletteSize = (frame.paletteSize[0] << 2) + (frame.paletteSize[1] << 1) + (frame.paletteSize[2]);
+    frame.paletteSize = Math.pow(2, frame.paletteSize + 1)
+
+    if (frame.paletteExists) return "localPalette";
+    else return "imageData";
+  },
+    // if sublocks was able to read:
+    //   increase cursor from subblocks
+    //   increase cursor from fields
+    // else
+    //   set waiting
+    //   subtract 2 from cursor (for the 2 that was read to get the data block)
+    //   subtract part.bytesize from cursor (not needed in this case?)
+  "applicationExtension": function(gif, fields){
+    var blockinfo = readSubBlocks(gif);
+    if (blockinfo === false) {
+      gif.waitingForFileBuffer = true
+      gif.buf.cursor -= specReader.parts.applicationExtension.byteSize
+      return;
+    } else {
+      var extension = {"data": blockinfo};
+      for(var field in fields)
+        extension[field] = fields[field]
+      gif.extensions.push(extension)
+      return "dataBlock";
+    }
+  },
+  "comment": function(gif, fields){
+    var blockinfo = readSubBlocks(gif);
+    if (blockinfo === false) {
+      gif.waitingForFileBuffer = true;
+      gif.buf.cursor -= specReader.parts.comment.byteSize;
+      return;
+    } else {
+      var extension = {"comment": blockinfo};
+      for(var field in fields)
+        extension[field] = fields[field];
+      gif.extensions.push(extension);
+      return "dataBlock";
+    }
+  },
+  "plainText": function(gif, fields){
+    var blockinfo = readSubBlocks(gif);
+    if (blockinfo === false) {
+      gif.waitingForFileBuffer = true;
+      gif.buf.cursor -= specReader.parts.plainText.byteSize;
+      return;
+    } else {
+      var extension = {"plainText": blockinfo};
+      for(var field in fields)
+        extension[field] = fields[field];
+      gif.extensions.push(extension);
+      return "dataBlock";
+    }
+  },
+  "graphicControl": function(gif, fields){
+    var dm = (fields.disposalMethod[0] << 2) + (fields.disposalMethod[1] << 1) + (fields.disposalMethod[2]);
+    gif.frames.push({"delay": fields.delay,
+                     "transparentIndex": fields.transparentColor ? fields.transparentIndex : -1,
+                     "disposalMethod": dm})
+    return "dataBlock";
+  },
+  "imageData": function(gif, fields){
+    var blockinfo = readSubBlocks(gif);
+    if (blockinfo === false) {
+      gif.waitingForFileBuffer = true
+      gif.buf.cursor -= specReader.parts.imageData.byteSize
+      console.log("fucked")
+      return;
+    } else {
+
+// TODO: ENABLE THIS!
+//      gif.tube("progress", "found " + gif.frames.length + " frames");
+
+      var frame = gif.frames[gif.frames.length - 1];
+      //var palette = ("palette" in frame) ? frame.palette : gif.palette // local palette otherwise global palette
+      frame.lzwCodeSize = fields.lzwCodeSize;
+      frame.blockinfo = blockinfo;
+//      var transparentIndex = ("transparentIndex" in frame) ? frame.transparentIndex : -1
+      return "dataBlock";
+    }    
+
+  }
+};
+
+// read subblocks out of a gif's buffer...
+// reads block sizes and returns an object with a start cursor and an array of block ends
+// returns false if there's not enough data 
+var readSubBlocks = function(gif){
+
+  if (gif.benchmark) gif.benchmark.start("read-subblocks");
+
+  var blockEnds = [];
+
+  var buf = gif.buf,
+      u8 = buf.u8,
+      byteLength = u8.byteLength;
+  
+  // gif.cursor is for whole file... pos is a cursor for just this blob
+  var startBlockCursor = buf.cursor;
+  var pos = buf.cursor;
+  startBlockCursor += 1;
+  var byteSize = 0;
+  var outOfData = false
+
+  // only actually advance cursor if we can read in all the sub blocks from the buffer
+  var cursorTemp = 0;
+
+  while(!outOfData){
+    // get block size
+    if (byteLength < pos + 1) { outOfData = true; break;}
+    byteSize = u8[pos];
+    pos += 1;
+
+    // a sub block with size 0 indicates end of sub blocks
+    if (byteSize === 0) { cursorTemp += 1; break;}
+    
+    // read block
+    if (byteLength < pos + byteSize) { outOfData = true; break;}
+    blockEnds.push(pos + byteSize);
+    
+    pos += byteSize
+    cursorTemp += byteSize + 1
+    // gif.subBlocksRead += 1
+  }
+
+  // TODO? CLEAN UP!
+  if (outOfData) { 
+    // gif.bufferMisses += 1
+    // gif.benchmark.wasted += (Date.now() - start) / 1000
+    console.log("out of data")
+    return false
+
+  } else { // end of sub blocks happened
+    buf.cursor += cursorTemp
+    //if ("onprogress" in gif) gif.onprogress(gif, Math.floor(gif.cursor / gif.file.size * 100))
+//    gif.benchmark.subblocks += (Date.now() - start) / 1000;
+    if (gif.benchmark) gif.benchmark.stop("read-subblocks");
+    return {start: startBlockCursor, blockEnds: blockEnds};
+
+  }
+};
+
+module.exports = decode;
+})()
+},{"./spec":13,"./palette":14,"./animate":15,"../../binaryspec":16}],13:[function(require,module,exports){var blockSigs = {
+ 0x21: "extension",
+ 0x2c: "imageDesc",
+ 0x3b: "trailer"
+};
+
+exports.blockSigs = blockSigs;
+
+var extSigs = {
+ 0xf9: "graphicControl",
+ 0xfe: "comment",
+ 0x01: "plainText",
+ 0xff: "applicationExtension"
+};
+
+exports.extSigs = extSigs;
+
+/*
+GIF.getGeneralBlockType = function(sig){
+  if (sig == 0x3b)
+    return "trailer"
+  else if (sig < 0x7F)
+    return "graphic rendering block"
+  else if (sig < 0xF9)
+    return "control block"
+  else return "special purpose block"
+}
+
+*/
+
+var spec = {
+  "header": [
+    "str[3] signature",
+    "str[3] version"
+  ],
+  "screenDesc": [
+    "u16    w",
+    "u16    h",
+    "bit    paletteExists",
+    "bit[3] resolution ignore",
+    "bit    sortFlag ignore",
+    "bit[3] paletteSize",
+    "u8     bgColorIndex",
+    "u8     aspectRatio ignore"
+  ],
+  "imageDesc": [
+    "u8     sig ignore",
+    "u16    x",
+    "u16    y",
+    "u16    w",
+    "u16    h",
+    "bit    paletteExists",
+    "bit    interlaced",
+    "bit    sortFlag",
+    "bit[2] reserved ignore",
+    "bit[3] paletteSize"   
+  ],
+  "applicationExtension": [
+    "u8     sig ignore",
+    "u8     extSig ignore",
+    "u8     blockSize ignore",
+    "str[8] identifier",
+    "str[3] authCode ignore"
+  ],
+  "graphicControl": [
+    "u8     sig ignore",
+    "u8     extSig ignore",
+    "u8     blockSize ignore",
+    "bit[3] reserved ignore",
+    "bit[3] disposalMethod",
+    "bit    userInput ignore",
+    "bit    transparentColor",
+    "u16    delay",
+    "u8     transparentIndex",
+    "u8     blockTerminator ignore"
+  ],
+  "comment": [
+    "u8     sig ignore",
+    "u8     extSig ignore"
+  ],
+  "plainText": [
+    "u8    sig ignore",
+    "u8    extSig ignore",
+    "u8    blockSize",
+    "u16   textGridLeft",
+    "u16   textGridTop",
+    "u16   textGridWidth",
+    "u16   textGridHeight",
+    "u8    charCellWidth",
+    "u8    charCellHeight",
+    "u8    fgColorIndex",
+    "u8    bgColorIndex"
+  ],
+  "imageData": [
+    "u8     lzwCodeSize"
+  ]
+};
+
+exports.spec = spec;
+},{}],14:[function(require,module,exports){(function(){var rgba2css = require('../../color/rgba2css');
+var create2d = require('../../create/2d');
+var createImageData = require('../../create/imagedata');
+
+var palette = {};
+
+// flat typed array of r g b a values from binary GIF palette
+palette.binary2rgba = function(abuf /*, transparentIndex */){
+  var table = new Uint8Array(abuf.byteLength/3*4);
+  var counter = 0
+  for(var i = 0, length = abuf.byteLength/3*4; i<length; i+=4){
+    table[i] = abuf[counter];
+    table[i+1] = abuf[counter+1];
+    table[i+2] = abuf[counter+2];
+    table[i+3] = 255;
+    counter += 3;
+  }
+/*
+  if (transparentIndex !== undefined)
+    table[transparentIndex*4 + 3] = 0;
+*/
+  return table;
+};
+
+
+// TODO. break this up, make less confusing, etc.
+// horrible monolithic palette mappings constructor
+// builds a hash lookup to map rgba value to palette index
+// builds an array to map indexes to rgba values
+// builds an array to map indexes to css values
+// builds an imagedata to map indexes to colors
+//
+// gif palette index numbers are not preserved... 
+// this makes a palette from all local palettes (frames) plus global palette
+// only ONE transparent value is included... 0,0,0,0, others are ignored
+palette.create = function(gif){
+
+  // boot up palette with a transparent color to start with
+  var rgba2Index = {"0":0},
+      index2Css = ["rgba(0,0,0,0)"],
+      index2Rgba = [[0,0,0,0]];
+
+  var addPalette = function(palette){
+    for(var i=0, size=palette.length; i<size; i+=4){
+      var a = palette[i+3]
+      if (a === 0) continue; // skip transparent values... just use first palette index for them
+      var r = palette[i],
+          g = palette[i+1],
+          b = palette[i+2],
+          index = (r | (g << 8) | (b << 16) | (a << 24)).toString();
+          // http://jsperf.com/rgba-hash-lookup
+          // also... this overflows and flips sign... is that safe over diff. js implementations?
+          if (index in rgba2Index) continue;
+          rgba2Index[index] = index2Rgba.length
+          var rgba = [r,g,b,a]
+          index2Rgba.push(rgba)
+          index2Css.push(rgba2css(rgba))
+    }
+  };
+
+  if ("palette" in gif)
+    addPalette(gif.palette)
+
+  for(var f=0; f<gif.frames.length; f++){
+    var frame = gif.frames[f];
+    if (!("palette" in frame)) continue;
+    addPalette(frame.palette)
+  }
+
+  // create this last, as we don't know palette size until it is built
+  var imagedata = createImageData(index2Rgba.length, 1)
+  for(var i=0, size=index2Rgba.length*4, data=imagedata.data; i<size; i+=4){
+    var rgba = index2Rgba[i/4]
+    data[i] = rgba[0]
+    data[i+1] = rgba[1]
+    data[i+2] = rgba[2]
+    data[i+3] = rgba[3]
+  }
+
+  return {"rgba2Index": rgba2Index,
+          "index2Rgba": index2Rgba,
+          "index2Css": index2Css,
+          "imagedata": imagedata,
+          "length": index2Rgba.length}
+};
+
+module.exports = palette;
+})()
+},{"../../color/rgba2css":17,"../../create/2d":18,"../../create/imagedata":19}],17:[function(require,module,exports){var rgba2css = function(rgba){
+  //return "rgba(" + rgba.join(",") + ")"
+  // arraybuffers have no join...
+  return "rgba(" + rgba[0] + "," + rgba[1] + "," + rgba[2] + "," + rgba[3] + ")"
+}
+module.exports = rgba2css;
+},{}],18:[function(require,module,exports){var create2d = function(w, h){
+  var canvas = document.createElement("canvas");
+  canvas.width = w || 0;
+  canvas.height = h || 0;
+  return canvas.getContext("2d");
+};
+
+if (typeof module !== "undefined") module.exports = create2d;
+},{}],19:[function(require,module,exports){var createImageData = function createImageData(w, h){
+  return createImageData.ctx.createImageData(w, h);
+};
+createImageData.ctx = document.createElement("canvas").getContext("2d");
+
+if (typeof module !== "undefined") module.exports = createImageData;
+},{}],15:[function(require,module,exports){//make a function on a gif that determines which frame to show given a timestamp.
+// this allows all gifs to be synced no matter when they are loaded
+// however, this is undesirable if you want to start an animation on frame 0 when it is displayed.
+var makeCurrentFrame = function(){
+  var defaultDelay = 100; // msecs
+
+  if (this.frames.length === 1){ // shortcut for static gifs
+    this.currentFrame = function(){ return 0 };
+  }
+
+  var totalDelay = 0;
+  var delays = [];
+  for(var i=0; i<this.frames.length; i++){
+    var frame = this.frames[i];
+    var delay = ("delay" in frame && frame.delay > 0) ? frame.delay * 10 : defaultDelay;
+    totalDelay += delay;
+    delays.push(totalDelay);
+  }
+
+  this.currentFrame = makeCurrentFrameFunction(delays);
+};
+
+var makeCurrentFrameFunction = function(delays){ 
+  var totalTime = delays[delays.length - 1];
+  return function(timestamp){
+    var r = (timestamp || Date.now()) % totalTime;
+    for(var i=0; i<delays.length; i++)
+      if (r < delays[i])
+        return i;
+    return i;
+  }
+};
+
+exports.makeCurrentFrame = makeCurrentFrame;
+},{}],16:[function(require,module,exports){var tokenize = require('./string/tokenize');
+var BitView = require('../deps/bitview/bitview.timb.js');
+
+var BinarySpecReader = function(spec){
+  var reader = Object.create(BinarySpecReader.proto);
+  var parts = reader.parts = {};
+
+  for (var partName in spec)
+    parts[partName] = decodeSpecPart(spec[partName]);
+
+  return reader;
+};
+
+BinarySpecReader.proto = {};
+
+// decodes GIF parsing info from the specification
+var decodeSpecPart = function(part){
+
+  var bitSizes = {
+    "bit": 1,
+    "str": 8,
+    "i8": 8,
+    "u8": 8,
+    "i16": 16,
+    "u16": 16,
+    "i32": 32,
+    "u32": 32
+  };
+
+  var parsedSpec = {"fields": []};
+  var size = 0;
+
+  for (var i=0; i<part.length; i++){
+    
+    var instruction = tokenize(part[i]);
+    var ignore = /(^|\s)ignore($|\s)/.test(part[i]);
+    var typeInfo = instruction[0].split("["); // eg "uint(16)"
+    var fieldType = typeInfo[0];
+    var fieldLength = parseInt(typeInfo[1] || 1);
+    var isArray = (typeInfo.length > 1);
+                                                // char(2) is 16 bits. uint(16) is 16 bits
+    var bitSize = bitSizes[fieldType] * fieldLength;
+
+    parsedSpec.fields.push({"name": instruction[1],
+                      "type": fieldType,
+                      "ignore": ignore,
+                      "bitSize": bitSize,
+                      "isArray": isArray});
+    size += bitSize;
+  }
+  
+  parsedSpec.bitSize = size;
+  parsedSpec.byteSize = size / 8;
+
+  return parsedSpec;
+};
+
+// decodes a chunk according to data types in gif.spec.js
+// todo: rewrite the binary decoding stuff to not be so shit
+BinarySpecReader.proto.decodeBinaryFieldsToJSON = function(partName, cursor, buf){ var reader = this;
+
+  var part = reader.parts[partName];
+
+  var fields = {}, numFields = part.fields.length, bitPos = 0;
+
+  for(var i = 0; i < numFields; i++){
+
+    var field = part.fields[i];
+    if (!field.ignore) {
+      var bitOffset = bitPos % 8;
+      var decodeByteStart = Math.floor((bitPos - bitOffset) / 8);
+      var decodeByteEnd = decodeByteStart + Math.ceil(field.bitSize / 8);
+
+      switch(field.type){
+        case "u8":
+          fields[field.name] = buf.u8[cursor + decodeByteStart]; break;
+        case "i8":
+          fields[field.name] = buf.dv.getInt8(cursor + decodeByteStart); break;
+        case "u16":
+          fields[field.name] = buf.dv.getUint16(cursor + decodeByteStart, true); break;
+        case "i16":
+          fields[field.name] = buf.dv.getInt16(cursor + decodeByteStart, true); break;
+        case "u32":
+          fields[field.name] = buf.dv.getUint32(cursor + decodeByteStart, true); break;
+        case "i32":
+          fields[field.name] = buf.dv.getInt32(cursor + decodeByteStart, true); break;
+        case "str":
+          fields[field.name] = abuf2str(buf.abuf, cursor + decodeByteStart, field.bitSize >> 3); break;
+        case "bit":
+          if (!field.isArray) {
+            fields[field.name] = new BitView(buf.abuf, cursor + decodeByteStart).getBit(bitOffset);
+          } else {
+            var bv = new BitView(buf.abuf, cursor + decodeByteStart);
+            var bits = [];
+            for (var bb=bitOffset; bb<bitOffset+field.bitSize; bb++){
+              bits.push(bv.getBit(bb))
+            }
+            fields[field.name] = bits;
+          }
+          break;
+         // fields[field.name] = abuf2str(buf.abuf, cursor + decodeByteStart, field.bitSize / 8); break;
+        default:
+          console.log("please implement: " + field.type + ", " + partName);
+      }
+    }
+    bitPos += field.bitSize;
+  }
+  //gif.cursor += part.byteSize;
+  //GIF.decode.handleLoadedPart[gif.nextPart](gif, fields);
+  // console.log(fields);
+  return fields
+}
+
+// todo: wasteful of space?
+var abuf2str = function(abuf, offset, len) {
+  return String.fromCharCode.apply(null, new Uint8Array(abuf, offset, len));
+}
+
+
+module.exports = BinarySpecReader;
+},{"./string/tokenize":8,"../deps/bitview/bitview.timb.js":20}],20:[function(require,module,exports){// @timb: edit of https://github.com/kig/bitview.js by Ilmari Heikkinen
+var BitView = function(buf, offset) {
+  this.buffer = buf;
+  this.u8 = new Uint8Array(buf, offset);
+};
+
+BitView.prototype.getBit = function(idx) {
+  var v = this.u8[idx >> 3];
+  var off = idx & 0x7;
+  return (v >> (7-off)) & 1;
+};
+
+module.exports = BitView;
+},{}],6:[function(require,module,exports){var create2d = require('../../create/2d');
+var createImageData = require('../../create/imagedata');
+//import queueOrNextTick from 'lib/nexttick4';
+var nextTick = require('../../nexttick');
+
+var lzwImageData = require('./decode-lzw');
+
+/*
+  this has two rendering types... canvas and webgl
+  both build gif image frames from binary data that was decoded when the gif loaded
+
+  canvas method will build full-frame canvas objects and place them into each frame of the gif.
+  eg, render.canvas(gif) will create gif.frames[0].ctx and so on
+
+  webgl method builds imagedata textures and tries to pack multiple frames efficiently into channels if it can.
+
+  in gifs, each frame stored might just be a rectangle that changed from the previous frame.
+  these are referred to as "raw frames" in this code
+*/
+
+var render = function(gif, config){
+
+  config = config || {};
+
+  var bench = gif.benchmark || false;
+
+  var frameNum = config.frameNum || 0;
+
+  if (frameNum === 0){ // preallocate all frames
+    for (var i=0; i<gif.frames.length; i++){
+      gif.frames[i].ctx = create2d(gif.w, gif.h);
+      gif.buf.pixeldata = new Uint8Array(gif.w * gif.h);
+    }
+  }
+
+  if (frameNum >= gif.frames.length) { // done making frames
+    //gif.tube("progress", "done")
+    gif.rendered = true;
+    gif.tube("rendered");
+    return
+  }
+
+  var frame = gif.frames[frameNum];
+  var pixeldata = gif.buf.pixeldata;
+
+  // gif.percentLoaded = frameNum / gif.frames.length
+  //gif.tube("decompressing frame " + (frameNum+1))
+
+
+
+  // lzw
+  if (bench) bench.start("decompress-lzw");
+  // var pixeldata = new Uint8Array(frame.w * frame.h);
+  //pixeldata.area = frame.w * frame.h;
+  lzwImageData(frame.blockinfo, gif.buf.u8, frame.lzwCodeSize, frame.w, frame.h, pixeldata);
+  if (bench) bench.stop("decompress-lzw");
+
+  // deinterlace
+  if (frame.interlaced) {
+    if (bench) bench.start("deinterlace");
+    pixeldata = deinterlacePixels(pixeldata, frame.w, frame.h)
+    if (bench) bench.stop("deinterlace");
+  }
+
+  // canvas-ize
+  if (bench) bench.start("pixeldata-to-canvas");
+  makeFullFrame(pixeldata, gif, frameNum);
+  if (bench) bench.stop("pixeldata-to-canvas");
+
+  // todo: queue this better
+  var func = render.bind(undefined, gif, {"frameNum": frameNum+1});
+  // queueOrNextTick(func);
+  nextTick(func);
+  // setZeroTimeout(func);
+  //setTimeout(func, 1) // otherwise progress won't show in chrome
+
+};
+
+var makeFullFrame = function(pixeldata, gif, frameNum){
+
+  var frame = gif.frames[frameNum],
+      ctx = frame.ctx;
+
+  if (frameNum === 0){ // don't need previous frame info to do disposal if it's the first frame
+    ctx.putImageData(pixelDataToImageData(pixeldata, gif, frame), frame.x, frame.y,
+                        0,0,frame.w,frame.h);
+    return;
+  }
+
+  var prevFrameNum = frameNum-1,
+      prevFrame = gif.frames[prevFrameNum],
+      prevCanvas = prevFrame.ctx.canvas,
+      rawCtx;
+
+  // disposal method is 0 (unspecified) or 1 (do not dispose)
+  // do nothing, paste new frame image over old one
+  if (prevFrame.disposalMethod === 0 || prevFrame.disposalMethod === 1){
+    rawCtx = makeRawFrameAsContext(gif, frameNum, pixeldata);
+    ctx.drawImage(prevCanvas, 0, 0)
+    ctx.drawImage(rawCtx.canvas, 0,0,frame.w,frame.h,   frame.x,frame.y,frame.w,frame.h)
+  }
+
+  // disposal method is 2 (restore to background color)
+  // but everyone just restores to transparency
+  // see notes on http://www.imagemagick.org/Usage/anim_basics/#background
+  if (prevFrame.disposalMethod === 2){
+    // fast path... whole frame cleared
+    if (prevFrame.x === 0 && prevFrame.y === 0 && prevFrame.w === gif.w && prevFrame.h === gif.h) {
+      // var rawContext = makeRawFrameAsContext(gif, frameNum)
+      // frame.context.drawImage(rawContext.canvas, frame.x, frame.y);
+      ctx.putImageData(makeRawFrameAsImageData(gif, frameNum, pixeldata), frame.x, frame.y,
+                            0,0,frame.w,frame.h);
+    } else { // draw the edges of the previous frame and then draw the current frame overtop
+      /*
+      .__________.
+      |__________|
+      | |      | |
+      | |      | |
+      |_|______|_|
+      |__________|
+      */
+      //top
+      if (prevFrame.y > 0)
+        ctx.drawImage(prevCanvas, 0,0, gif.w,prevFrame.y,   
+                                    0,0, gif.w,prevFrame.y);
+      //left
+      if (prevFrame.x > 0)
+        ctx.drawImage(prevCanvas, 0,prevFrame.y, prevFrame.x,prevFrame.h, 
+                                    0,prevFrame.y, prevFrame.x,prevFrame.h);
+      // right
+      if (prevFrame.x+prevFrame.w < gif.w)
+        ctx.drawImage(prevCanvas, prevFrame.x+prevFrame.w, prevFrame.y,   (gif.w-prevFrame.x-prevFrame.w),prevFrame.h,
+                                    prevFrame.x+prevFrame.w, prevFrame.y,   (gif.w-prevFrame.x-prevFrame.w),prevFrame.h);
+      // bottom
+      if (prevFrame.y+prevFrame.h < gif.h)
+        ctx.drawImage(prevCanvas, 0,prevFrame.y+prevFrame.h,  gif.w,(gif.h-prevFrame.y-prevFrame.h),
+                                    0,prevFrame.y+prevFrame.h,  gif.w,(gif.h-prevFrame.y-prevFrame.h))
+
+      rawCtx = makeRawFrameAsContext(gif, frameNum, pixeldata);
+      ctx.drawImage(rawCtx.canvas, 0,0,frame.w,frame.h,   frame.x,frame.y,frame.w,frame.h);
+
+    }
+  }
+
+  // disposal method is 3 (restore to previous)
+  if (prevFrame.disposalMethod === 3){
+    // look for last previous frame that doesn't have "previous" disposal method
+    while(prevFrameNum > 0 && gif.frames[prevFrameNum].disposalMethod === 3) prevFrameNum -= 1;
+    prevFrame = gif.frames[prevFrameNum]
+    // console.log(prevFrameNum)
+    if (prevFrame.disposalMethod != 3) ctx.drawImage(prevFrame.ctx.canvas, 0, 0)
+    rawCtx = makeRawFrameAsContext(gif, frameNum, pixeldata);
+    ctx.drawImage(rawCtx.canvas, 0,0,frame.w,frame.h,   frame.x, frame.y,frame.w,frame.h)
+  }
+
+}
+
+var makeRawFrameAsContext = function(gif, frameNum, pixeldata){
+  // cache a context to reuse
+  if (makeRawFrameAsContext.ctx && 
+      makeRawFrameAsContext.ctx.canvas.width === gif.w &&
+      makeRawFrameAsContext.ctx.canvas.height === gif.h) {
+    var ctx = makeRawFrameAsContext.ctx;
+  } else {
+    var ctx = makeRawFrameAsContext.ctx = create2d(gif.w, gif.h);
+  }
+
+  var frame = gif.frames[frameNum];
+  pixeldata = pixeldata || frame.pixelData;
+  var palette = ("palette" in frame) ? frame.palette : gif.palette;
+  var transparentIndex = ("transparentIndex" in frame) ? frame.transparentIndex : -1;
+
+  if (transparentIndex > -1) palette[(transparentIndex*4)+3] = 0;
+
+  var rawImageData = pixelData2imageData(gif, palette, pixeldata, frame.w, frame.h, transparentIndex);
+
+  ctx.putImageData(rawImageData, 0, 0, 0,0,frame.w,frame.h)
+
+  return ctx
+
+  // return imageData2contextDirty(rawImageData, 0,0,frame.w,frame.h);
+};
+
+var makeRawFrameAsImageData = function(gif, frameNum, pixeldata){
+  var frame = gif.frames[frameNum];
+  pixeldata = pixeldata || frame.pixelData;
+  var palette = ("palette" in frame) ? frame.palette : gif.palette;
+  var transparentIndex = ("transparentIndex" in frame) ? frame.transparentIndex : -1;
+
+  if (transparentIndex > -1) palette[(transparentIndex*4)+3] = 0;
+
+  return pixelData2imageData(gif, palette, pixeldata, frame.w, frame.h, transparentIndex)
+};
+
+var pixelDataToImageData = function(pixeldata, gif, frame){
+  // var frame = gif.frames[frameNum];
+  var palette = ("palette" in frame) ? frame.palette : gif.palette;
+  var transparentIndex = ("transparentIndex" in frame) ? frame.transparentIndex : -1;
+
+  if (transparentIndex > -1) palette[(transparentIndex*4)+3] = 0;
+
+  return pixelData2imageData(gif, palette, pixeldata, frame.w, frame.h, transparentIndex)
+};
+
+
+var imageData2context = function(imageData){
+  var ctx = create2d(imageData.width, imageData.height)
+  ctx.putImageData(imageData, 0, 0)
+  return ctx
+};
+var imageData2contextDirty = function(imageData, dx,dy,dw,dh){
+  var ctx = create2d(imageData.width, imageData.height)
+  ctx.putImageData(imageData, 0, 0, dx,dy,dw,dh)
+  return ctx
+};
+
+var pixelData2imageData = function(gif, palette, pixeldata, w, h, transparentIndex){
+  if (pixelData2imageData.imagedata && 
+      pixelData2imageData.imagedata.width === gif.w &&
+      pixelData2imageData.imagedata.height === gif.h) {
+    var imagedata = pixelData2imageData.imagedata;
+  } else {
+    var imagedata = pixelData2imageData.imagedata = createImageData(gif.w, gif.h);
+  }
+
+  var data = imagedata.data
+  // var i = pixeldata.length;
+  var i = 0;
+
+  for (var y=0; y<h; y++){ var yinc = y*gif.w;
+    for (var x=0; x<w; x++){ //var i = y*gif.w+x;
+      // var cp = i*4
+      var cp = (x + yinc)*4
+      var ct = pixeldata[i]*4 //palette[pixeldata[i]]
+      data[cp] = palette[ct]
+      data[cp+1] = palette[ct+1]
+      data[cp+2] = palette[ct+2]
+      data[cp+3] = palette[ct+3]
+      i += 1;
+    }
+  }
+
+  return imagedata;
+};
+
+// deinterlace the 4 chunks from one imageData blob in one pass
+// see appendix e of gif spec
+//
+// ideas: canvasize first, then deinterlace... 
+// and do canvas drawImage calls or putImageData calls to move the rows around?
+var deinterlacePixels = function(oldpixels, w, h){
+
+  var pixels = new Uint8Array(oldpixels.length)
+  var stripes2 = Math.ceil(h/8) // the row where the 2nd interlaced chunk starts
+  var stripes3 = Math.ceil(h/4)
+  var stripes4 = Math.ceil(h/2)
+
+  // pixels[(w*y) +x] = oldpixels[(w*y) +x] <- base calculation
+
+  for(var y=0; y<h; y++){
+    var interlacedRowOffset
+    var rowOffset = w * y
+    if (y % 8 === 0)
+      interlacedRowOffset = w* (y/8)
+    else if ((y + 4) % 8 === 0)
+      interlacedRowOffset = w* ((y-4)/8+stripes2)
+    else if (y % 2 === 0)
+      interlacedRowOffset = w* ((y-2)/4+stripes3)
+    else
+      interlacedRowOffset = w* ((y-1)/2+stripes4)
+    for(var x=0; x<w; x++)
+      pixels[rowOffset+x] = oldpixels[interlacedRowOffset+x]
+  }
+
+  return pixels;
+};
+
+module.exports = render;
+},{"../../create/2d":18,"../../create/imagedata":19,"../../nexttick":11,"./decode-lzw":21}],21:[function(require,module,exports){// looked at imagemagick implementation instead of trying to figure out my buggy one
+
+/*
+    decodes an lzw compressed gif frame 
+    mostly based on imagemagick's implementation
+
+    data, binary string
+    data_size, lzw compression code size
+    w, h, width and height of image
+    paletteRemap is an optional array of different palette indexes to use
+
+    returns typed array of palette index values
+
+    this assumes we have the entire data for the frame buffered...  
+    its possible to modify this so that a resumable state could be passed in, but prob not necessary
+*/ 
+// TODO: cache stacks?
+var lzwImageData = function(blockinfo, u8buf, data_size, w, h, pixels, paletteRemap){
+  var MaxStack = 4096;
+  var NullCode = -1;
+  var cursor = 0
+  var npix = w * h;
+  var code, in_code, old_code;
+  var first = 0;
+  var top = 0;
+  var pi = 0
+  var pixels = pixels || new Uint8Array(npix);
+  var prefix = new Uint16Array(MaxStack*2) //Uint16Array(MaxStack*1.5) <-- this makes a nice glitch
+  var suffix = new Uint8Array(MaxStack)
+  // var prefix = lzwImageData.prefix;
+  // var suffix = lzwImageData.suffix;
+  var pixelStack = new Uint8Array(MaxStack+1)
+
+  //  Initialize GIF data stream decoder.
+  var clear = 1 << data_size;
+  var end_of_information = clear + 1;
+  var available = clear + 2;
+  old_code = NullCode;
+  var code_size = data_size + 1;
+  var code_mask = (1 << code_size) - 1;
+  for (code = 0; code < clear; code++){
+    prefix[code] = 0;
+    suffix[code] = code;
+  }
+
+  var bits = 0; var datum = 0;
+  var dvcursor = blockinfo.start;
+  var blockEnds = blockinfo.blockEnds;
+  var blockEnd = blockEnds.shift();
+
+  //  Decode GIF pixel stream.
+  for (var i = 0; i < npix;){
+    if (top === 0){
+
+      if (bits < code_size){
+
+        datum += u8buf[dvcursor] << bits;
+
+        bits += 8;
+
+        dvcursor++;
+        if (dvcursor === blockEnd){
+          dvcursor += 1;
+          blockEnd = blockEnds.shift();
+        }
+
+        continue;
+
+      }
+      code = datum & code_mask;
+      datum >>= code_size;
+      bits -= code_size;
+
+      if (code > available) {
+        console.log(":(");
+      //  console.log(num2bin(code));
+      //  break;
+      } // if we get here something bad happened ;(
+      if (code === end_of_information) { console.log("fuck"); break};
+      if (code === clear) {
+        code_size = data_size + 1;
+        code_mask = (1 << code_size) - 1;
+        available = clear + 2;
+        old_code = NullCode;
+        continue;
+      }
+      if (old_code === NullCode){
+        pixelStack[top++] = suffix[code];
+        old_code = code;
+        first = code;
+        continue;
+      }
+      in_code = code;
+      if (code === available){
+        pixelStack[top++] = first;
+        code = old_code;
+      }
+      while (code > clear){
+        pixelStack[top++] = suffix[code];
+        code = prefix[code];
+      }
+      first = (suffix[code]) // & 0xff;
+                              // ^^ timb: not needed?
+      //  Add a new string to the string table,
+      if (available >= MaxStack) { /*console.log("maxstack!");*/ /*break;*/ }
+      pixelStack[top++] = first;
+      prefix[available] = old_code;
+      suffix[available] = first;
+      available++;
+      /* why does == have higher precedence than & ?
+         i just looked it up and i think it is because javascript
+         has basically the same precedence as C and 
+         "once upon a time, C didn't have the logical operators && and ||, 
+         and the bitwise operators & and | did double duty."
+      */
+      if ((available & code_mask) === 0 && available < MaxStack){
+        code_size++;
+        code_mask += available;
+      }
+      old_code = in_code;
+    }
+
+    top--;
+    if (paletteRemap)
+      pixels[pi++] = paletteRemap[pixelStack[top]];
+    else
+      pixels[pi++] = pixelStack[top];
+    i++;
+  }
+
+  // not needed: typed arrays init'd to 0 already
+  // for (i = pi, len=pixels.length; i < len; i++) 
+        // pixels[i] = 0; // clear missing pixels
+
+
+  return pixels
+};
+
+var MaxStack = 4096;
+// lzwImageData.prefix = new Uint16Array(MaxStack*2)
+// lzwImageData.suffix = new Uint8Array(MaxStack)
+
+module.exports = lzwImageData;
+},{}]},{},[1]);
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