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utlion

HTML5 提供了 Canvas.toDataURL(mimetype), 这个方法在 Opera, Firefox, and Safari 4 beta 中已经支持了. 但是由于安全原因还有很多限制

因此我们并不需要引入其他额外的功能包，例如：

<canvas id=canvas width=200 height=200></canvas> <script> window.onload = function() { var canvas = document.getElementById("canvas"); var context = canvas.getContext("2d"); context.fillStyle = "green"; context.fillRect(50, 50, 100, 100); // no argument defaults to image/png; image/jpeg, etc also work on some // implementations -- image/png is the only one that must be supported per spec. window.location = canvas.toDataURL("image/png"); } </script>

 

2012-10-16 17:03