Web UI

Important notes

This example uses HTML and JavaScript, but it can be used as a reference for integrations with any framework.

Button Element

To trigger the action from the frontend, you will need to implement a button that uses the handleSendCommand method to request Unreal Engine to trigger the action in the blueprint responsible for taking the screenshot.

<button class="button-interaction" onclick="handleSendCommand({CreateScreenshot: 'CreateScreenshot'})">Take Screenshot</butto

Function to download the screenshot

We need a JavaScript function that listens for a response from Unreal Engine (which you can name as you wish; in this example, we used CreateScreenshot). This function will handle any browser logic needed to download the file.


let Application;
let screenshotCounter = 1;
import * as PixelStreamingWebSdk from "https://unpkg.com/@arcware-cloud/pixelstreaming-websdk@latest/index.esm.js";

(function() {
  const { ArcwareInit } = PixelStreamingWebSdk;
  const initResult = new ArcwareInit(
    { shareId: "share-ee32808e-34fe-466a-8dd9-178b71ed5501" },
    {
      initialSettings: { StartVideoMuted: true, AutoConnect: true, AutoPlayVideo: true },
      settings: {
        infoButton: true, micButton: true, audioButton: true, fullscreenButton: true,
        settingsButton: true, connectionStrengthIcon: true,
      }
    }
  );
  
  Application = initResult.Application;
  Application.getApplicationResponse(response => {
    if (response.startsWith("CreateScreenshot")) createFile(window.file);
  });
  
  setTimeout(() => {
    document.getElementById("video-container").appendChild(Application.rootElement);
  });
  window.file = Application.webRtcController.file;
})();

function handleSendCommand(command) {
  if (Application) {
    Application.emitUIInteraction(command);
  }
}

function createFile(file) {
  const blob = new Blob(file.data, { type: file.mimetype });
  const url = URL.createObjectURL(blob);
  const a = document.createElement("a");
  const counterString = String(screenshotCounter).padStart(2, '0');
  a.href = url;
  a.download = `screenshot${counterString}${file.extension}`;
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
  URL.revokeObjectURL(url);
  screenshotCounter++;
}

Code Example

To help guide your implementation, you can refer to the following options:

CodePen Interactive example

HTML + JavaScript code example:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Pixel Streaming Screenshot</title>
  <style>
    * { margin: 0; padding: 0; }
    #video-container { width: 100vw; height: 100vh; position: relative; }
    #video-container video { left: 0; top: 0; }
    .button-interaction {
      position: absolute; right: 100px; bottom: 20px; padding: 20px 40px;
      z-index: 9; cursor: pointer; border-radius: 5px; background: #daf693;
      border: none; text-transform: uppercase; font-size: 16px; font-weight: bold;
    }
  </style>
</head>
<body>
  <div id="video-container"></div>
  <button class="button-interaction" onclick="handleSendCommand({CreateScreenshot: 'CreateScreenshot'})">Take Screenshot</button>

  <script type="module">
    let Application;
    let screenshotCounter = 1;
    import * as PixelStreamingWebSdk from "https://unpkg.com/@arcware-cloud/pixelstreaming-websdk@latest/index.esm.js";
    
    (function() {
      const { ArcwareInit } = PixelStreamingWebSdk;
      const initResult = new ArcwareInit(
        { shareId: "share-ee32808e-34fe-466a-8dd9-178b71ed5501" },
        {
          initialSettings: { StartVideoMuted: true, AutoConnect: true, AutoPlayVideo: true },
          settings: {
            infoButton: true, micButton: true, audioButton: true, fullscreenButton: true,
            settingsButton: true, connectionStrengthIcon: true,
          }
        }
      );
      
      Application = initResult.Application;
      Application.getApplicationResponse(response => {
        if (response.startsWith("CreateScreenshot")) createFile(window.file);
      });
      
      setTimeout(() => {
        document.getElementById("video-container").appendChild(Application.rootElement);
      });
      window.file = Application.webRtcController.file;
    })();
    
    function handleSendCommand(command) {
      if (Application) {
        Application.emitUIInteraction(command);
      }
    }
    
    function createFile(file) {
      const blob = new Blob(file.data, { type: file.mimetype });
      const url = URL.createObjectURL(blob);
      const a = document.createElement("a");
      const counterString = String(screenshotCounter).padStart(2, '0');
      a.href = url;
      a.download = `screenshot${counterString}${file.extension}`;
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
      URL.revokeObjectURL(url);
      screenshotCounter++;
    }
  </script>
</body>
</html>

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