This repository has been archived by the owner on Jul 17, 2024. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 35
/
index.js
56 lines (50 loc) · 1.81 KB
/
index.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
/**
* Copyright 2021 Google Inc. All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import * as Comlink from 'comlink';
const maxIterations = 1000;
const canvas = document.getElementById('canvas');
const { width, height } = canvas;
const ctx = canvas.getContext('2d');
const timeOutput = document.getElementById('time');
(async function init() {
// Create a separate thread from wasm-worker.js and get a proxy to its handlers.
let handlers = await Comlink.wrap(
new Worker(new URL('./wasm-worker.js', import.meta.url), {
type: 'module'
})
).handlers;
function setupBtn(id) {
// Handlers are named in the same way as buttons.
let handler = handlers[id];
// If handler doesn't exist, it's not supported.
if (!handler) return;
// Assign onclick handler + enable the button.
Object.assign(document.getElementById(id), {
async onclick() {
let { rawImageData, time } = await handler({
width,
height,
maxIterations
});
timeOutput.value = `${time.toFixed(2)} ms`;
const imgData = new ImageData(rawImageData, width, height);
ctx.putImageData(imgData, 0, 0);
},
disabled: false
});
}
setupBtn('singleThread');
if (await handlers.supportsThreads) {
setupBtn('multiThread');
}
})();