2013年12月1日 星期日
HTML5 Canvas Shadow
<canvas style="background-color:#000000" id="myCanvas201312010535" width="400" height="300">不支援Canvas。</canvas>
<script type="text/javascript">
(function(){
var canvas,context,img;
var init = function(){
canvas = document.getElementById('myCanvas201312010535');
context = canvas.getContext('2d');
};
var drawShadow = function(e){
context.shadowBlur = 50; //光暈,模糊
context.shadowColor = "rgba(255, 255, 255 ,1)"; //也可以使用rag(r,g,b) or 直接給色碼
context.beginPath();
context.arc(100,100,50,0,Math.PI*2,false);
context.closePath();
context.fillStyle = "rgba(88,178,220,0.5)";
context.fill();
context.shadowBlur = 60; //光暈,模糊
context.shadowColor = "rgba(225, 225, 225 ,1)"; //也可以使用rag(r,g,b) or 直接給色碼
context.shadowOffsetX = 10;
context.shadowOffsetY = -5;
context.beginPath();
context.arc(250,100,50,0,Math.PI*2,false);
context.closePath();
context.fillStyle = "rgba(251,226,81,0.6)";
context.fill();
};
init();
drawShadow();
}());
</script>
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