App下載
實(shí)例代碼( Tip: 登錄后體驗(yàn)更佳 )
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<span>没有进行clip():</span>
<canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">
您的浏览器不支持 HTML5 canvas 标签。
</canvas>
<script>
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
// 画一个矩形
ctx.rect(50,20,200,120);
ctx.stroke();
// 画一个红色矩形
ctx.fillStyle="red";
ctx.fillRect(0,0,150,100);
</script> 
<span>有进行clip():</span>
<canvas id="myCanvas2" width="300" height="150" style="border:1px solid #d3d3d3;">
您的浏览器不支持 HTML5 canvas 标签。</canvas>
<script>
var c=document.getElementById("myCanvas2");
var ctx=c.getContext("2d");
//剪切一个矩形区域
ctx.rect(50,20,200,120);
ctx.stroke();
ctx.clip();
//剪切之后画一个矩形
ctx.fillStyle="red";
ctx.fillRect(0,0,150,100);
</script> 
 
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