124 lines
3.3 KiB
HTML
124 lines
3.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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<title>Cropper.js</title>
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<link rel="stylesheet" href="../dist/cropper.css">
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<style>
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.container {
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max-width: 640px;
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margin: 20px auto;
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}
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img {
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max-width: 100%;
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}
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.cropper-view-box,
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.cropper-face {
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background-color: black;
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opacity: 1;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>Mask an image (Redaction)</h1>
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<h3>Image</h3>
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<div>
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<img id="image" src="../docs/images/picture.jpg" alt="Picture">
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</div>
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<h3>Result</h3>
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<p><button type="button" id="button">Mask</button></p>
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<div id="result"></div>
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</div>
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<script src="../dist/cropper.js"></script>
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<script>
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(function () {
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function getMaskedCanvas(sourceCanvas, sourceImage, cropper) {
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var canvas = document.createElement('canvas');
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var context = canvas.getContext('2d');
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var maskWidth = cropper.getData().width;
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var maskHeight = cropper.getData().height;
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var maskTop = cropper.getData().y;
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var maskLeft = cropper.getData().x;
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var imageWidth = cropper.getImageData().naturalWidth;
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var imageHeight = cropper.getImageData().naturalHeight;
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var imageLeft = cropper.getImageData().left;
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var imageTop = cropper.getImageData().top;
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var imageAspect = cropper.getImageData().aspectRatio;
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canvas.width = imageWidth;
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canvas.height = imageHeight;
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// debug
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console.log('Image Width: ' + imageWidth + ' Image Height: ' + imageHeight + ' Image Aspect Ratio: ' + imageAspect );
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console.log('Image Left: ' + imageLeft + ' Image Top: ' + imageTop );
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console.log('Mask Width: ' + maskWidth + ' Mask Height: ' + maskHeight + ' Mask Left: ' + maskLeft + ' Mask Top: ' + maskTop);
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context.imageSmoothingEnabled = true;
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context.drawImage(image, 0, 0, imageWidth, imageHeight);
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context.fillRect(maskLeft, maskTop, maskWidth, maskHeight);
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return canvas;
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}
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window.addEventListener('DOMContentLoaded', function () {
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var image = document.getElementById('image');
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var button = document.getElementById('button');
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var result = document.getElementById('result');
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var croppable = false;
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var cropper = new Cropper(image, {
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viewMode: 0,
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guides: true,
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center: true,
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highlight: true,
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cropBoxMovable: true,
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cropBoxResizable: true,
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ready: function () {
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croppable = true;
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}
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});
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button.onclick = function () {
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var croppedCanvas;
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var roundedCanvas;
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var roundedImage;
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if (!croppable) {
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return;
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}
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// Crop
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croppedCanvas = cropper.getCroppedCanvas();
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// Mask
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maskedCanvas = getMaskedCanvas(croppedCanvas, image, cropper);
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// Show
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maskedImage = document.createElement('img');
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maskedImage.src = maskedCanvas.toDataURL()
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result.innerHTML = '';
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result.appendChild(maskedImage);
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};
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});
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})();
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</script>
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</body>
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</html>
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