<html>
<body>
<canvas id="canvas" width="100" height="100" style="background-color: #000;"/>
<script>
function position (x,y){
this.x = x;
this.y = y;
}
var canvas = document.getElementById('canvas'),
ctx = canvas.getContext('2d');
width = canvas.width,
height = canvas.height;
ctx.fillStyle = "#FF0000";
ctx.font = "20px Arial";
ctx.fillText("妈妈",10,50);
var pixs = ctx.getImageData(0,0,width,height).data;
var Pixels = new Array();
for(var i=0;i<pixs.length;i+= 4)
{
var r = pixs[i],
g = pixs[i+1],
b = pixs[i+2],
a = pixs[i+3];
if(r != 0 || g != 0 || b != 0 ){
var x = i%400;
var y = i/400;
Pixels.push(new position(x,y));
}
}
</script>
</body>
</html>
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