RepositorySys/wwwroot/cropperjs-main/docs/examples/mask-an-image.html

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="x-ua-compatible" content="ie=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <title>Cropper.js</title>
  <link rel="stylesheet" href="../css/cropper.css">
  <style>
    .container {
      margin: 20px auto;
      max-width: 640px;
    }

    img {
      max-width: 100%;
    }

    .cropper-view-box,
    .cropper-face {
      background-color: black;
      opacity: 1;
    }

  </style>
</head>
<body>
  <div class="container">
    <h1>Mask an image (Redaction)</h1>
    <h3>Image</h3>
    <div>
      <img id="image" src="../images/picture.jpg" alt="Picture">
    </div>
    <h3>Result</h3>
    <p><button type="button" id="button">Mask</button></p>
    <div id="result"></div>
  </div>
  <script src="../js/cropper.js"></script>
  <script>
    function getMaskedCanvas(sourceCanvas, sourceImage, cropper) {
      var canvas = document.createElement('canvas');
      var context = canvas.getContext('2d');
      var maskWidth = cropper.getData().width;
      var maskHeight = cropper.getData().height;
      var maskTop =  cropper.getData().y;
      var maskLeft =  cropper.getData().x;
      var imageWidth = cropper.getImageData().naturalWidth;
      var imageHeight = cropper.getImageData().naturalHeight;
      var imageLeft = cropper.getImageData().left;
      var imageTop = cropper.getImageData().top;
      var imageAspect = cropper.getImageData().aspectRatio;

      canvas.width = imageWidth;
      canvas.height = imageHeight;

      // Debug
      console.log('Image Width: ' + imageWidth  + ' Image Height: ' + imageHeight + ' Image Aspect Ratio: ' + imageAspect );
      console.log('Image Left: ' + imageLeft  + ' Image Top: ' + imageTop );
      console.log('Mask Width: ' + maskWidth + ' Mask Height: ' + maskHeight + ' Mask Left: ' + maskLeft + ' Mask Top: ' + maskTop);