局部放大
2017-04-20 本文已影响0人
洛洛kkkkkk
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#myCanvas{
border: 10px solid red;
}
</style>
</head>
<body>
<canvas id="myCanvas" width="600" height="600"></canvas>
</body>
<script type="text/javascript">
var myCanvas = document.getElementById("myCanvas");
var context = myCanvas.getContext("2d");
var imgObj = new Image();
imgObj.src = "AKL.jpg";
imgObj.onload = function () {
context.drawImage(imgObj,0,0,153,272,0,0,153,272);
myCanvas.onmousemove = function (e) {
var x = e.offsetX;
var y = e.offsetY;
context.clearRect(0,0,myCanvas.width,myCanvas.height);
context.drawImage(imgObj,0,0,153,272,0,0,153,272);
context.drawImage(imgObj,x-50,y-50,100,100,x-100,y-100,200,200);
}
}
</script>
</html>
