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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://s3.amazonaws.com/feellondon/uploads/1.gif">
<div id="loading">loading...</div>
</div>
<div id="images"></div>
</body>
<script type="text/javascript" src="gif.js"></script>
<script type="text/javascript" src="canvasquery.js"></script>
<script type="text/javascript" src="canvasquery.dither.js"></script>
<script type="text/javascript">
document.getElementById("url").onchange = load
load()
function load(imageURL) {
document.getElementById("loading").style.display = "inline"
var imageURL = proxify( document.getElementById("url").value );
if (imageURL.substr(-3) === "gif") {
window.gif = GIF(imageURL);
// gif.on("error", tryToLoadNextImage);
// gif.on("rendered", trackLoadTime);
gif.on("rendered", ready);
return gif.render();
} else {
window.img = new Image();
// img.addEventListener("error", tryToLoadNextImage);
img.addEventListener("load", ready);
img.crossOrigin = "anonymous";
return img.src = imageURL;
}
}
function giveImage() {
if (imageURL.substr(-3) === "gif") {
return gif.frames[gif.currentFrame()].ctx.canvas;
} else {
return img;
}
}
function proxify (url) {
return "/cgi-bin/proxy?" + url // .replace(/^https?:\/\//, "");
};
function ready(){
document.getElementById("loading").style.display = "none"
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)
}
build()
animate()
}
var algo = "random"
var frames;
var viewer;
function build(){
frames = []
document.getElementById("images").innerHTML = ""
gif.frames.forEach(function(frame){ dither(frame) })
canvas = gif.frames[0].ctx.canvas
var w = canvas.width, h = canvas.height;
viewer = cq(w, h)
viewer.appendTo("#images")
}
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"]( )
frames.push(cc)
}
var raf_id;
function animate(){
raf_id = requestAnimationFrame(animate)
var canvas = frames[gif.currentFrame()].canvas
viewer.drawImage(canvas, 0, 0, canvas.width, canvas.height)
}
</script>
</html>
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