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