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<!doctype html>
<html>
<head>
<title>Gifs</title>
</head>
<body>
<div>
<button id="random">random</button>
<button id="pattern2">pattern2</button>
<button id="pattern3">pattern3</button>
<button id="pattern4">pattern4</button>
<button id="pattern2Lite">pattern2lite</button>
<button id="pattern3Lite">pattern3lite</button>
<button id="pattern4Lite">pattern4lite</button>
<button id="floydSteinberg">floyd-steinberg</button>
<button id="right">right</button>
<input type="text" id="url" value="http://i.imgur.com/BmGm7sU.gif">
<button id="save">SAVE</button>
<span id="loading"></span>
</div>
<div id="images"></div>
</body>
<script type="text/javascript" src="js/vendor/gif-encode/util.js"></script>
<script type="text/javascript" src="js/vendor/gif-encode/tube.js"></script>
<script type="text/javascript" src="js/vendor/gif-encode/client.js"></script>
<script type="text/javascript" src="js/vendor/gif.js"></script>
<script type="text/javascript" src="js/vendor/FileSaver/FileSaver.js"></script>
<script type="text/javascript" src="js/vendor/canvasquery.js"></script>
<script type="text/javascript" src="js/canvasquery.dither.js"></script>
<script type="text/javascript" src="js/image.js"></script>
<script type="text/javascript" src="js/util.js"></script>
<script type="text/javascript">
var algo = "random"
var frames = []
var lastGif;
document.getElementById("url").onchange = load
setTimeout(load)
function status (s){
var el = document.getElementById("loading")
el.innerHTML = s + "..."
}
function load () {
document.getElementById("save").style.display = "none"
status("loading")
var imageURL = document.getElementById("url").value
loadImage(imageURL, ready)
}
function ready(){
status("")
var buttons = document.getElementsByTagName("button")
for (var i = 0; i < buttons.length; i++) {
(function(n){
buttons[n].onclick = function(){
algo = buttons[n].id;
build()
}
})(i)
}
document.getElementById("save").onclick = save
build()
}
var encoder = new GifEncoder()
encoder.on("quantized", function(url){
status("encoding")
encoder.encode()
})
encoder.on("rendered-url", function(url){
status("")
var image = new Image ()
image.src = url
document.body.appendChild(image)
})
encoder.on("rendered", function(bits){
status("")
lastGif = bits
document.getElementById("save").style.display = "inline"
})
function save (){
if (!lastGif) return;
var filename = document.getElementById("url").value.replace(/^.*\//,"").replace(/\.gif.*$/,"")
var blob = new Blob ([lastGif], {type: "image/gif"});
saveAs(blob, filename + "-" + algo + "-" + (+new Date() % 1000) + ".gif");
}
function build(){
document.getElementById("save").style.display = "none"
status("dithering")
encoder.resetFrames()
document.getElementById("images").innerHTML = ""
gif.frames.forEach(function(frame){
var cc = dither(frame)
encoder.addFrame(cc.canvas)
})
if (! encoder.quantized) {
status("quantizing")
encoder.quantize()
}
else {
status("encoding")
encoder.encode()
}
}
function dither(frame){
var canvas = frame.ctx.canvas
var w = canvas.width, h = canvas.height;
var cc = cq(w, h)
cc.drawImage(canvas, 0, 0, w, h);
cc[algo + "Dither"]( )
return cc
// cc.appendTo("#images")
}
</script>
</html>
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