<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>V Mandelbrot WebAssembly Example</title>
</head>
<body>
<canvas id="canvas" width="200" height="200" style="width:100%;height:100%;image-rendering: crisp-edges;"></canvas>
<script>
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var memory;
function get_string(ptr, len) {
const buf = new Uint8Array(memory.buffer, ptr, len);
const str = new TextDecoder("utf8").decode(buf);
return str
}
const env = {
canvas_x: () => canvas.width,
canvas_y: () => canvas.height,
setpixel: (x, y, c) => {
ctx.fillStyle = "rgba(1,1,1,"+(c/255)+")";
ctx.fillRect(x, y, 1, 1);
},
__writeln: (ptr, len) => {
console.log(get_string(ptr, len))
},
__panic_abort: (ptr, len) => {
throw get_string(ptr, len);
}
}
WebAssembly.instantiateStreaming(fetch("mandelbrot.wasm"), {env: env}).then((res) => {
memory = res.instance.exports['memory'];
console.time('main.main')
res.instance.exports['main.main']()
console.timeEnd('main.main')
});
</script>
</body>
</html>