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HTML画布图片

51自学网 http://www.wanshiok.com

 要在画布上绘制图像,请使用以下方法:

drawImage(image,x,y)

图像加载前无法绘制图像。 从window.onload()调用此函数。

JavaScript:

window.onload = function() {
    var canvas = document.getElementById("myCanvas");
    var ctx = canvas.getContext("2d");
    var img = document.getElementById("scream");
    ctx.drawImage(img, 1010);
};
完整源代码:
<!DOCTYPE html>
<html>
<body>

<p>Image to use:</p>

<img id="scream" width="220" height="277" src=""/skin/default/images/logo.gif" alt="The Scream">

<p>Canvas:</p>

<canvas id="myCanvas" width="240" height="297" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.
</canvas>

<script>
window.onload = function() {
    var canvas = document.getElementById("myCanvas");
    var ctx = canvas.getContext("2d");
    var img = document.getElementById("scream");
   ctx.drawImage(img, 10, 10);
};
</script>

</body>
</html>

 
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