复制代码代码如下:
<html>
<Body>
<canvas id = "canvas" style = "colorent-color: #000;"/>
<Cript>
Posição da função (x, y) {
this.x = x;
this.y = y;
}
var Canvas = document.getElementById ('Canvas'),
ctx = Canvas.getContext ('2D');
largura = Canvas.width,
altura = canvas.Height;
ctx.fillstyle = "#ff0000";
ctx.font = "20px Arial";
ctx.FillText ("妈妈", 10,50);
var pixs = ctx.getImagedata (0,0, largura, altura) .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 (nova posição (x, y));
}
}
</script>
</body>
</html>