js HTML5 canvas绘制图片的方法

时间:2020-05-16 1点人气:0

本文实例为大家分享了HTML5 canvas绘制图片的具体代码，供大家参考，具体内容如下

demo.js

window.onload=function() {
  createcanvas();
 
  drawImage();
}
 function createcanvas() {
   var CANVAS=document.getElementById('mycanvas');
   context=CANVAS.getContext('2d');
 }
 
function drawImage() {
  var img=new Image();
  img.onload=function() {
    context.drawImage(img,0,0,200,200 );
  }
  img.src="img5.jpg";
}

demo.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>canvas</title>
 
  <script type="text/javascript" src="demo.js"></script>
</head>
<body>
  <canvas id="mycanvas"  width="400" hight="400" >
<span>你的浏览器不支持canvas</span>
</canvas>
 
</body>
</html>

图片：

效果：

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