@twocatmoon/game-doctor

Game Doctor

Game Doctor generates diagnostic reports for HTML5 video games in easy-to-share formats. Reports contain information about graphics, device, network, fps, screenshots, client fingerprint, and much more. Easy to implement, easy to use, and fully configurable with key-bindings and global window hooks.

Use our Diagnostic Formatting Tool to decode and generate human-friendly PDFs from diagnostic reports.

Diagnostic Formatting Tool »

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Table of Contents

• Getting Started
  • Installation
  • Configuration
  • Example Output
• Decoding Reports
• Contributing
• License
• Contact
• Acknowledgments

Getting Started

This is an example of how you may give instructions on setting up your project locally. To get a local copy up and running follow these simple example steps.

Installation

• Install Game Doctor via NPM

  npm i @twocatmoon/game-doctor
  

• Import the GameDoctor class into your project and initialize an instance

  import { GameDoctor } from '@twocatmoon/game-doctor'
  
  const doctor = new GameDoctor({
     gameName: 'My Game',
     gameVersion: '1.0.0',
     outputToConsole: true,
     outputFormat: 'base64',
     copyToClipboard: true,
     canvasEl: myGame.canvasEl,
     async canvasRenderFn () { myGame.render() },
  })
  

• Call the doTick method somewhere in your main game loop so we can detect FPS

  doctor.doTick()
  

• (Optional) Call the generateReport method

  await doctor.generateReport()
  

• (Optional) Hook up the FPS indicator

  doctor.showFps()
  doctor.showFps(boolean)
  doctor.hideFps()
  

You should now see a diagnostic report in your console, and have the base64-encoded JSON copied to your clipboard. Have your users send the outputted report data to your support team, which can be used to generate human-readable reports via Game Doctor or the online Diagnostic Formatting Tool.

Note: For full configuration options and further usage instructions see below.

Configuration

type GameDoctorOptions = {
    // The name of your game
    gameName: string
    // The current version of your game client
    gameVersion: string
    // Copies output to clipboard while true
    copyToClipboard?: boolean
    // Add additional info to the fingerprinting hash algorithm
    additionalFingerprintInfo?: any
    // The canvas element your game is rendering to
    canvasEl?: HTMLCanvasElement
    // The method you call to render your game to the canvas (required for taking screenshots from WebGL contexts)
    canvasRenderFn?: () => Promise<void>
    // URL to use to determine ping duration
    pingUrl?: string
    // Add __toggleFps and __generateReport methods to the window object
    attachToWindow?: boolean
    // Any additional information you'd like included in the report
    getAdditionalInfo?: () => Promise<any>
    // Output the report to the console in a human-readable format
    outputToConsole?: boolean
    // Output format in json, base64 encoded json, or shareable png (Diagnostic Formatting Tool requires base64 or image/png formats)
    outputFormat?: 'json' | 'base64' | 'image/png'
    // Image to overlay ontop of image/png exports (like your game or company logo)
    overlayImage?: HTMLCanvasElement | HTMLImageElement
    // Configure keyboard shortcuts to generate reports and toggle the FPS counter
    keyboardShortcuts?: {
        generateReport: {
            key: string
            ctrlKey?: boolean
            altKey?: boolean
            shiftKey?: boolean
            metaKey?: boolean
        },
        toggleFps: {
            key: string
            ctrlKey?: boolean
            altKey?: boolean
            shiftKey?: boolean
            metaKey?: boolean
        },
    }
    // Which reports to generate (by default all are enabled except for location)
    reports?: {
        performance?: boolean
        network?: boolean
        window?: boolean
        device?: boolean
        graphicsDevice?: boolean
        screenshot?: boolean
        location?: boolean
        fingerprint?: boolean
        fps?: boolean
        lastError?: boolean
    }
}

Example Output

{
  "reportId": "f2301f0e5d35f",
  "date": "2023-02-07T19:43:21.133Z",
  "timezone": 420,
  "gameName": "Test Game",
  "gameVersion": "1.0.0",
  "additionalInfo": {
    "foo": "bar"
  },
  "performance": {
    "timeOrigin": 1675798998737.4,
    "timing": {
      "connectStart": 1675798998749,
      "navigationStart": 1675798998737,
      "secureConnectionStart": 0,
      "fetchStart": 1675798998741,
      "domContentLoadedEventStart": 1675798998860,
      "responseStart": 1675798998761,
      "domInteractive": 1675798998800,
      "domainLookupEnd": 1675798998749,
      "responseEnd": 1675798998762,
      "redirectStart": 0,
      "requestStart": 1675798998749,
      "unloadEventEnd": 1675798998771,
      "unloadEventStart": 1675798998771,
      "domLoading": 1675798998772,
      "domComplete": 1675798998885,
      "domainLookupStart": 1675798998749,
      "loadEventStart": 1675798998885,
      "domContentLoadedEventEnd": 1675798998860,
      "loadEventEnd": 1675798998885,
      "redirectEnd": 0,
      "connectEnd": 1675798998749
    },
    "navigation": {
      "type": 1,
      "redirectCount": 0
    },
    "memory": {
      "totalJSHeapSize": 10424393,
      "usedJSHeapSize": 8561557,
      "jsHeapSizeLimit": 2172649472
    },
    "eventCounts": {
      "size": 36
    }
  },
  "network": {
    "effectiveType": "4g",
    "rtt": 100,
    "downlink": 10,
    "ipAddress": "XX.XX.XX.XX",
    "ping": 158.89999999850988
  },
  "window": {
    "innerWidth": 1197,
    "innerHeight": 1181,
    "pixelRatio": 1,
    "href": "http://localhost:5173/",
    "title": "Test Game",
    "isEmbedded": false,
    "referrer": "http://localhost:5173/"
  },
  "device": {
    "language": "en-US",
    "languages": [
      "en-US",
      "en"
    ],
    "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36",
    "deviceMemory": 8,
    "doNotTrack": null,
    "hardwareConcurrency": 8,
    "maxTouchPoints": 0
  },
  "graphicsDevice": {
    "renderer": "WebKit WebGL",
    "rendererUnmasked": "ANGLE (Apple, Apple M1, OpenGL 4.1)",
    "vendor": "WebKit",
    "vendorUnmasked": "Google Inc. (Apple)"
  },
  "screenshot": "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAA...",
  "fingerprint": "1845e3df8030e9bd8ada1ff6757b550c59b75b09f0459cae3686fe103afd809d",
  "fps": "55.3",
  "lastError": [
    "Uncaught Error: foo bar baz",
    "http://localhost:5173/src/main.ts?t=1675798998734",
    61
  ]
}

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Decoding Reports

Via Game Doctor

Reports can be decoded programatically using a set of static methods on the Game Doctor class.

  const decoded = GameDoctor.decodeBase64(string)
  const decoded = await GameDoctor.decodeImageUrl(string)
  const decoded = await GameDoctor.decodeImage(HTMLImageElement | HTMLCanvasElement)

Via the online Diagnostic Formatting Tool

Reports in the base64 or image/png formats can be decoded and formatted into human-readable, printable HTML pages using the Diagnostic Formatting Tool.

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Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement". Don't forget to give the project a star! Thanks again!

• Fork the Project
• Create your Feature Branch (git checkout -b feature/AmazingFeature)
• Commit your Changes (git commit -m 'Add some AmazingFeature')
• Push to the Branch (git push origin feature/AmazingFeature)
• Open a Pull Request

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License

Distributed under the MIT License. See LICENSE for more information.

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Contact

Twitter - @twocatmoon

Project Link - https://github.com/twocatmoon/game-doctor

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Acknowledgments

• Best-README-Template

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