move jpeg encoding to a worker thread pool

this also switches cvmts back to building with tsc, mostly because
I couldn't get parcel's worker interop to work at all.

cvmts/package.json

@@ -5,22 +5,17 @@
   "type": "module",
   "main": "dist/index.js",
   "scripts": {
-    "build": "parcel build src/index.ts --target node",
+    "build": "tsc -outDir dist -rootDir src/",
     "serve": "node dist/index.js"
   },
   "author": "Elijah R, modeco80",
   "license": "GPL-3.0",
-  "targets": {
-    "node": {
-      "context": "node",
-      "outputFormat": "esmodule"
-    }
-  },
   "dependencies": {
     "@computernewb/jpeg-turbo": "*",
     "@cvmts/qemu": "*",
     "execa": "^8.0.1",
     "mnemonist": "^0.39.5",
+    "piscina": "^4.4.0",
     "sharp": "^0.33.3",
     "toml": "^3.0.0",
     "ws": "^8.14.1"
@@ -28,7 +23,6 @@
   "devDependencies": {
     "@types/node": "^20.12.5",
     "@types/ws": "^8.5.5",
-    "parcel": "^2.12.0",
     "prettier": "^3.2.5",
     "typescript": "^5.4.4"
   }

cvmts/src/JPEGEncoderWorker.ts

@@ -0,0 +1,16 @@
+
+import jpegTurbo from "@computernewb/jpeg-turbo";
+import Piscina from "piscina";
+
+export default async (opts: any) => {
+    let res = await jpegTurbo.compress(opts.buffer, {
+		format: jpegTurbo.FORMAT_RGBA,
+		width: opts.width,
+		height: opts.height,
+		subsampling: jpegTurbo.SAMP_422,
+		stride: opts.stride,
+		quality: opts.quality
+	});
+
+    return Piscina.move(res);
+}

cvmts/src/WSServer.ts

@@ -13,22 +13,20 @@ import { isIP } from 'node:net';
 import { QemuVM, QemuVmDefinition } from '@cvmts/qemu';
 import { IPData, IPDataManager } from './IPData.js';
 import { readFileSync } from 'node:fs';
-import { fileURLToPath } from 'url';
-import path from 'path';
+import path from 'node:path';
 import AuthManager from './AuthManager.js';
 import { Size, Rect, Logger } from '@cvmts/shared';
 
-import jpegTurbo from "@computernewb/jpeg-turbo";
 import sharp from 'sharp';
+import Piscina from 'piscina';
 
-// @ts-expect-error (I know, but this is already ugly)
-// really wish I didn't have to do it like this..
-const __dirname = fileURLToPath(new __parcel__URL__('..'));
+// Instead of strange hacks we can just use nodejs provided
+// import.meta properties, which have existed since LTS if not before
+const __filename = import.meta.filename;
+const __dirname = import.meta.dirname;
 
+const kCVMTSAssetsRoot = path.resolve(__dirname, '../../assets');
 
-console.log(__dirname);
-
-// ejla this exist. Useing it.
 type ChatHistory = {
     user: string,
     msg: string
@@ -46,19 +44,27 @@ function GetRawSharpOptions(size: Size): sharp.CreateRaw {
     }
 }
 
+const kJpegPool = new Piscina({
+   filename: path.join(import.meta.dirname + '/JPEGEncoderWorker.js'),
+   minThreads: 4,
+   maxThreads: 4
+});
+
 async function EncodeJpeg(canvas: Buffer, displaySize: Size, rect: Rect): Promise<Buffer> {
 	let offset = (rect.y * displaySize.width + rect.x) * 4;
 
-	//console.log('encoding rect', rect, 'with byteoffset', offset, '(size ', displaySize, ')');
+    let res = await kJpegPool.run({
+        buffer: canvas.subarray(offset),
+        width: rect.width,
+        height: rect.height,
+        stride: displaySize.width,
+        quality: kJpegQuality
+    });
 
-	return jpegTurbo.compress(canvas.subarray(offset), {
-		format: jpegTurbo.FORMAT_RGBA,
-		width: rect.width,
-		height: rect.height,
-		subsampling: jpegTurbo.SAMP_422,
-		stride: displaySize.width,
-		quality: kJpegQuality
-	});
+
+    // have to manually turn it back into a buffer because
+    // Piscina for some reason turns it into a Uint8Array
+    return Buffer.from(res);
 }
 
 export default class WSServer {
@@ -125,8 +131,8 @@ export default class WSServer {
         this.voteCooldown = 0;
         this.turnsAllowed = true;
         this.screenHidden = false;
-        this.screenHiddenImg = readFileSync(__dirname + "/../assets/screenhidden.jpeg").toString("base64");
-        this.screenHiddenThumb = readFileSync(__dirname + "/../assets/screenhiddenthumb.jpeg").toString("base64");
+        this.screenHiddenImg = readFileSync(path.join(kCVMTSAssetsRoot, "screenhidden.jpeg")).toString("base64");
+        this.screenHiddenThumb = readFileSync(path.join(kCVMTSAssetsRoot, "screenhiddenthumb.jpeg")).toString("base64");
 
         this.indefiniteTurn = null;
         this.ModPerms = Utilities.MakeModPerms(this.Config.collabvm.moderatorPermissions);
@@ -937,7 +943,7 @@ export default class WSServer {
 
             // TODO: pass custom options to Sharp.resize() probably
             let out = await sharp(display.Buffer(), {raw: GetRawSharpOptions(display.Size())})
-                .resize(400, 300)
+                .resize(400, 300, { fit: 'fill' })
                 .toFormat('jpeg')
                 .toBuffer();
 

cvmts/tsconfig.json

@@ -1 +0,0 @@
-../tsconfig.json

cvmts/tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "extends": "../tsconfig.json",
+  "include": [ "src/**/*" ], 
+  "compilerOptions": {
+    "resolveJsonModule": true,
+  }
+}

yarn.lock

@@ -67,6 +67,7 @@ __metadata:
     execa: "npm:^8.0.1"
     mnemonist: "npm:^0.39.5"
     parcel: "npm:^2.12.0"
+    piscina: "npm:^4.4.0"
     prettier: "npm:^3.2.5"
     sharp: "npm:^0.33.3"
     toml: "npm:^3.0.0"
@@ -3155,6 +3156,26 @@ __metadata:
   languageName: node
   linkType: hard
 
+"nice-napi@npm:^1.0.2":
+  version: 1.0.2
+  resolution: "nice-napi@npm:1.0.2"
+  dependencies:
+    node-addon-api: "npm:^3.0.0"
+    node-gyp: "npm:latest"
+    node-gyp-build: "npm:^4.2.2"
+  conditions: "!os=win32"
+  languageName: node
+  linkType: hard
+
+"node-addon-api@npm:^3.0.0":
+  version: 3.2.1
+  resolution: "node-addon-api@npm:3.2.1"
+  dependencies:
+    node-gyp: "npm:latest"
+  checksum: 10c0/41f21c9d12318875a2c429befd06070ce367065a3ef02952cfd4ea17ef69fa14012732f510b82b226e99c254da8d671847ea018cad785f839a5366e02dd56302
+  languageName: node
+  linkType: hard
+
 "node-addon-api@npm:^6.0.0, node-addon-api@npm:^6.1.0":
   version: 6.1.0
   resolution: "node-addon-api@npm:6.1.0"
@@ -3204,6 +3225,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"node-gyp-build@npm:^4.2.2":
+  version: 4.8.0
+  resolution: "node-gyp-build@npm:4.8.0"
+  bin:
+    node-gyp-build: bin.js
+    node-gyp-build-optional: optional.js
+    node-gyp-build-test: build-test.js
+  checksum: 10c0/85324be16f81f0235cbbc42e3eceaeb1b5ab94c8d8f5236755e1435b4908338c65a4e75f66ee343cbcb44ddf9b52a428755bec16dcd983295be4458d95c8e1ad
+  languageName: node
+  linkType: hard
+
 "node-gyp@npm:latest":
   version: 10.1.0
   resolution: "node-gyp@npm:10.1.0"
@@ -3408,6 +3440,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"piscina@npm:^4.4.0":
+  version: 4.4.0
+  resolution: "piscina@npm:4.4.0"
+  dependencies:
+    nice-napi: "npm:^1.0.2"
+  dependenciesMeta:
+    nice-napi:
+      optional: true
+  checksum: 10c0/df6c2a2b673b0633a625f8dfc32f4519155e74ee24e31be9e69d2937e76d6cec8640278b4a50195652a943cccf8c634ed406f08598933c57e959d242b5fe5d1d
+  languageName: node
+  linkType: hard
+
 "postcss-value-parser@npm:^4.2.0":
   version: 4.2.0
   resolution: "postcss-value-parser@npm:4.2.0"