当您使用画布旋转图像时,它会被切断 - 我如何避免这种情况?我已经将画布元素制作得更大一些,但它仍然会切掉边缘。如何避免图像中断<canvas>旋转?
例子:
<html>
<head>
<title>test</title>
<script type="text/javascript">
function startup() {
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var img = new Image();
img.src = 'player.gif';
img.onload = function() {
ctx.rotate(5 * Math.PI/180);
ctx.drawImage(img, 0, 0, 64, 120);
}
}
</script>
</head>
<body onload='startup();'>
<canvas id="canvas" style="position: absolute; left: 300px; top: 300px;" width="800" height="800"></canvas>
</body>
</html>