VR Gallery for Google Photos

Google Photos viewer for Meta Quest.

• View flat and 360° photos and videos from Google Photos
• Scroll through individual albums or your entire library
• Your photos data never leaves your device
• 100% open source

Learn more at gallery.yoonicode.com • Made by Eric Yoon • Contributions welcome—see LICENSE

Install the app

Install from SideQuest

1. Download the SideQuest desktop app and configure your Meta Quest by following this guide.
2. Get the latest app on SideQuest.

Install the APK using ADB

1. Make sure you have the adb command line tool installed. (Installation guide)
2. Make sure your Meta Quest is in developer mode. (Guide)
3. Download the latest APK from the Releases tab.
4. Plug in your Quest to your computer. Accept the prompt on your Quest.
5. In a new shell, type adb devices and verify your Quest is listed. Type adb install path/to/file.apk.
6. Your app is installed under Unknown Sources in your Quest.

Get started with development

Install tools

• npm install -g serve

Create your own test Google Cloud project

1. Create a project in the Google Cloud Console
2. Under the API Library, enable the Google Photos library
3. Configure your OAuth Consent Screen
   • Authorize the domain yoonicode.com
   • Add the scope https://www.googleapis.com/auth/photoslibrary.readonly
4. Under the Credentials page, create a new credential
   • Type: OAuth Client ID
   • Application type: Web application
   • Add the Javascript origins "https://gallery.yoonicode.com" and "http://localhost:1234"
5. Take note of your client ID and client secret

Set up Firebase

1. Add Firebase to your Google Cloud project
2. Create a new Web client
3. Take note of the Firebase config shown to you

Get the website running

• cd OculusGooglePhotos-Web
• Copy config.template.js to config.js
  • Paste in your Google client ID
  • Paste in your Firebase Config JSON object
• npm install
• npm start

Get Cloud Functions running

• cd OculusGooglePhotos-Web/functions
• Copy config.template.js to config.js
  • Paste in your Google client ID and client secret
• npm run deploy, or to emulate locally, npm run serve
  • If you plan on using the emulator, you need to set up your admin credentials locally. See docs. Download your key as serviceAccountKey.json and place it in the functions directory.

Get Unity running

• Follow this guide to get your Meta Quest set up with Unity.
• Copy OculusGooglePhotos-Unity/Assets/Scripts/Constants.template to Constants.cs
  • Paste in your Cloud Functions base URL (such as https://us-central1-foobar.cloudfunctions.net)

Known problem: There seems to be a bug with Unity where a checkbox magically turns on every time a build is created. Go to Project Settings -> OpenXR -> Meta Quest Support (cog wheel) -> deselect Force Remove Internet.

Tip: use apktool d my-build.apk && cat my-build/AndroidManifest.xml | grep "INTERNET" to quickly check.

Technical details

Authentication flow

1. User is prompted visit the companion website and enter a code.
2. Website redirects user to Google login page
3. Once authorized, Google redirects user back to companion website with a query parameter of the auth code
4. Companion website trades authorization code for refresh token
5. Companion website calls a Firebase Function with the refresh token
6. Firebase Function saves the refresh token in the database paired with the code the user entered
7. Unity scene polls a Firebase Function every 5 seconds given its generated code, Firebase Function returns the refresh token
8. Unity trades in the refresh token for an access token whenever it expires