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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
.img {
display: inline-block;
}
.frames img {
width: 64px;
}
canvas {
touch-action: none;
user-select: none;
}
</style>
</head>
<body>
<p>
define matching points on both images (in same order)
<input type="checkbox" id="erase" />Erase
</p>
<div class="img">
<canvas id="canvas1" width="600" height="600"></canvas><br>
<input type="button" class="clear" value="clear points" target="canvas1">
<input type="file" target="canvas1">
</div>
<div class="img">
<canvas id="canvas2" width="600" height="600"></canvas><br>
<input type="button" class="clear" value="clear points" target="canvas2">
<input type="file" target="canvas2">
</div>
<div class="img">
<canvas id="result" width="600" height="600"></canvas><br>
<input type="text" id="frames" value="30">
<input type="checkbox" id="blend" checked/>Blend
<input type="button" id="generate" value="generate">
<input type="button" onclick="drawing=!drawing;draw();" value="draw">
</div>
<div>
<img id="gif">
</div>
<div class="frames">
</div>
<script src="//code.jquery.com/jquery-1.12.0.min.js"></script>
<script src="imgwarp.js"></script>
<script>
var warper = {};
var loadImg = function(target, canvas, img) {
var ratio = canvas.width / img.width; // set canvas size big enough for the image
canvas.height = img.height*ratio
var ctx = canvas.getContext("2d");
ctx.drawImage(img,0,0, img.width, img.height, 0, 0, canvas.width, canvas.height);
img.width = canvas.width;
img.height = canvas.height;
var imageData = ctx.getImageData(0, 0, img.width, img.height);
if (warper[target]) delete warper[target];
warper[target] = new ImgWarper.PointDefiner(canvas, img, imageData);
};
var img1 = new Image();
img1.onload = function() {
var img = img1;
var target = 'canvas1';
var canvas = document.getElementById(target);
loadImg(target, canvas, img);
var points = JSON.parse('[{"x":193,"y":216},{"x":226,"y":212},{"x":260,"y":219},{"x":306,"y":218},{"x":338,"y":208},{"x":370,"y":215},{"x":206,"y":229},{"x":226,"y":225},{"x":249,"y":230},{"x":314,"y":230},{"x":340,"y":224},{"x":361,"y":231},{"x":265,"y":313},{"x":297,"y":314},{"x":236,"y":360},{"x":282,"y":361},{"x":325,"y":360},{"x":251,"y":427},{"x":316,"y":428},{"x":165,"y":256},{"x":407,"y":253},{"x":199,"y":112},{"x":354,"y":103},{"x":188,"y":332},{"x":383,"y":328},{"x":211,"y":376},{"x":356,"y":383},{"x":124,"y":403},{"x":444,"y":405},{"x":178,"y":46},{"x":397,"y":49}]');
for (var x = 0; x < points.length; x++) {
points[x] = new ImgWarper.Point(points[x].x, points[x].y);
}
warper[target].oriPoints = points;
warper[target].dstPoints = points;
warper[target].redraw();
};
img1.src = "img/face1.jpg";
var img2 = new Image();
img2.onload = function(img) {
var img = img2;
var target = 'canvas2';
var canvas = document.getElementById(target);
loadImg(target, canvas, img);
var points = JSON.parse('[{"x":191,"y":228},{"x":217,"y":217},{"x":268,"y":233},{"x":335,"y":231},{"x":383,"y":222},{"x":410,"y":229},{"x":214,"y":258},{"x":240,"y":253},{"x":262,"y":258},{"x":340,"y":260},{"x":363,"y":253},{"x":390,"y":257},{"x":285,"y":339},{"x":322,"y":337},{"x":256,"y":379},{"x":302,"y":381},{"x":348,"y":379},{"x":270,"y":453},{"x":324,"y":454},{"x":160,"y":273},{"x":440,"y":274},{"x":242,"y":122},{"x":345,"y":121},{"x":190,"y":375},{"x":413,"y":373},{"x":221,"y":411},{"x":385,"y":411},{"x":106,"y":531},{"x":497,"y":534},{"x":200,"y":69},{"x":415,"y":69}]');
for (var x = 0; x < points.length; x++) {
points[x] = new ImgWarper.Point(points[x].x, points[x].y);
}
warper[target].oriPoints = points;
warper[target].dstPoints = points;
warper[target].redraw();
};
img2.src = "img/face2.jpg";
$("input.clear").click(function() {
var target = $(this).attr('target');
warper[target].oriPoints = [];
warper[target].dstPoints = [];
warper[target].redraw();
});
$("input[type=file]").on("change", function() {
var file = this.files[0];
var fr = new FileReader();
var target = $(this).attr('target');
var canvas=document.getElementById(target);
fr.onload = function() {
var img = new Image();
img.onload = function() { loadImg(target, canvas, img); };
img.src = fr.result
};;
fr.readAsDataURL(file)
});
var animator = null;
var frames = [];
$("#generate").click(function() {
// get points from both images
animator = new ImgWarper.Animator(warper['canvas1'], warper['canvas2']);
animator.generate($("#frames").val());
draw_all();
});
var play_frame = 0;
var direction = true;
var res_c = document.getElementById("result");
var res_ctx = res_c.getContext('2d');
var cnt = 0;
var drawing = false;
var intv = null;
function draw_all() {
frames = animator.frames;
for (var x = 0; x < frames.length; x++) {
res_ctx.putImageData(frames[x],0,0);
var image = document.createElement("img");
image.src = res_c.toDataURL("image/png");
$(".frames").append(image);
}
for (var x = frames.length-1; x >= 0; x--) {
res_ctx.putImageData(frames[x],0,0);
var image = document.createElement("img");
image.src = res_c.toDataURL("image/png");
$(".frames").append(image);
}
}
function draw() {
res_ctx.putImageData(frames[play_frame],0,0);
play_frame = direction ? play_frame + 1 : play_frame - 1;
if (play_frame == 0 || play_frame == frames.length - 1) direction = !direction;
if (drawing === true) {
intv = setTimeout(window.requestAnimationFrame(draw), 40);
} else {
clearTimeout(intv);
}
}
</script>
</body>
</html>