html5 图片旋转
找了很久,终于找到图片旋转的方法了,现在向大家分享一下!
<!DOCTYPE HTML> <html> <head> <title>test rotate</title> <script type= "text/javascript" > function startup() { var canvas = document.getElementById( 'canvas' ); var ctx = canvas.getContext( '2d' ); var img = new Image(); img.src = 'Penguins.jpg' ; img.onload = function() { ctx.translate(img.width / 2, img.height / 2); ctx.rotate(30 * Math.PI / 180); ctx.drawImage(img, 0, 0, 164, 164); } } </script> </head> <body onload= 'startup();' > <div id= "pw_body" style= "width:100%;height:100%" > <canvas id= "canvas" style= "position: absolute; left: 300px; top: 300px;" width= "800" height= "600" ></canvas> </div> </body> </html> |
效果图:
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