/
mandelbrot.html
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/
mandelbrot.html
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<!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>