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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Image Slider Animation with Server-Side GIF Generation</title>
<link href="https://unpkg.com/cropperjs/dist/cropper.css" rel="stylesheet">
<style>
body {
font-family: Arial, sans-serif;
display: flex;
flex-direction: column;
align-items: center;
padding: 20px;
background-color: #f0f0f0;
}
.input-group {
margin-bottom: 10px;
display: flex;
align-items: center;
}
input[type="file"] {
margin-left: 10px;
}
img.thumbnail {
margin-left: 10px;
width: 100px;
height: 100px;
object-fit: cover;
border: 1px solid #ccc;
}
button {
margin-top: 10px;
padding: 10px 20px;
}
#imageEditorModal {
display: none;
position: fixed;
left: 50%;
transform: translateX(-50%);
bottom: 3rem;
width: 70%;
background: #fff;
box-shadow: 0 0 10px rgba(0,0,0,0.5);
padding: 20px;
z-index: 1000;
text-align: center;
}
#cropImage {
max-width: 100%;
height: auto;
}
#generatedGif {
margin-top: 20px;
}
</style>
</head>
<body>
<div class="input-group">
<label>Image 1:</label>
<input type="file" id="image1Input" accept="image/*">
<img id="image1Thumbnail" class="thumbnail" alt="Image 1 Thumbnail">
</div>
<div class="input-group">
<label>Image 2:</label>
<input type="file" id="image2Input" accept="image/*">
<img id="image2Thumbnail" class="thumbnail" alt="Image 2 Thumbnail">
</div>
<div class="input-group">
<label>Transition Type:</label>
<select id="transitionType">
<option value="default">Sliding</option>
<option value="rotate">Rotating</option>
</select>
</div>
<canvas id="canvas" width="256" height="256" style="display: none;"></canvas>
<img id="generatedGif" alt="Generated GIF" style="display: none;">
<button id="downloadGif" style="display: none;">Download GIF</button>
<div id="status"></div>
<!-- Image editor modal -->
<div id="imageEditorModal">
<img id="cropImage" src="" alt="Image to crop">
<br>
<button id="cropButton">Crop</button>
</div>
<script src="https://unpkg.com/cropperjs"></script>
<script>
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
const statusDiv = document.getElementById('status');
const imageEditorModal = document.getElementById('imageEditorModal');
const cropImage = document.getElementById('cropImage');
const cropButton = document.getElementById('cropButton');
const image1Thumbnail = document.getElementById('image1Thumbnail');
const image2Thumbnail = document.getElementById('image2Thumbnail');
const generatedGif = document.getElementById('generatedGif');
const downloadGifButton = document.getElementById('downloadGif');
const transitionTypeSelect = document.getElementById('transitionType');
let cropper;
let currentImageInput;
let currentThumbnail;
let croppedImages = {
'image1': null,
'image2': null
};
const defaultImages = {
'image1': 'https://th.bing.com/th/id/OIG1.jQk9obHLZDzKMIQQi_p3?pid=ImgGn',
'image2': 'https://th.bing.com/th/id/OIG4.Pyn6Qnls3A8X.VgxaLIn?pid=ImgGn'
};
function showImageEditor(imageSrc) {
cropImage.src = imageSrc;
imageEditorModal.style.display = 'block';
cropper = new Cropper(cropImage, {
aspectRatio: 1,
viewMode: 1
});
}
function hideImageEditor() {
if (cropper) {
cropper.destroy();
}
imageEditorModal.style.display = 'none';
}
function dataURLtoFile(dataurl, filename) {
const arr = dataurl.split(',');
const mime = arr[0].match(/:(.*?);/)[1];
const bstr = atob(arr[1]);
let n = bstr.length;
const u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new File([u8arr], filename, { type: mime });
}
function loadImage(input, callback) {
if (input.files && input.files[0]) {
const reader = new FileReader();
reader.onload = function (e) {
callback(e.target.result);
}
reader.readAsDataURL(input.files[0]);
}
}
function handleImageUpload(input, thumbnail, key) {
loadImage(input, (imageSrc) => {
currentImageInput = input;
currentThumbnail = thumbnail;
showImageEditor(imageSrc);
currentThumbnail.dataset.key = key;
});
}
image1Input.addEventListener('change', function () {
handleImageUpload(image1Input, image1Thumbnail, 'image1');
});
image2Input.addEventListener('change', function () {
handleImageUpload(image2Input, image2Thumbnail, 'image2');
});
cropButton.addEventListener('click', function () {
const croppedCanvas = cropper.getCroppedCanvas();
const croppedImage = croppedCanvas.toDataURL('image/png');
const originalFileName = currentImageInput.files[0].name;
const croppedFileName = originalFileName.replace(/\.[^/.]+$/, "") + "_crop.png";
const file = dataURLtoFile(croppedImage, croppedFileName);
const key = currentThumbnail.dataset.key;
croppedImages[key] = file;
currentThumbnail.src = croppedImage;
hideImageEditor();
// Replace the current image input file with the cropped file
const dataTransfer = new DataTransfer();
dataTransfer.items.add(file);
currentImageInput.files = dataTransfer.files;
generateGif();
});
transitionTypeSelect.addEventListener('change', function () {
generateGif();
});
function generateGif() {
statusDiv.textContent = 'Generating GIF...';
const formData = new FormData();
formData.append('images', croppedImages['image1'] || dataURLtoFile(defaultImages['image1'], 'image1_default.png'));
formData.append('images', croppedImages['image2'] || dataURLtoFile(defaultImages['image2'], 'image2_default.png'));
formData.append('transition_type', transitionTypeSelect.value);
fetch('/generate_gif', {
method: 'POST',
body: formData
})
.then(response => {
if (response.ok) {
return response.blob();
} else {
return response.json().then(errorData => { throw new Error(errorData.error); });
}
})
.then(blob => {
const url = URL.createObjectURL(blob);
generatedGif.src = url;
generatedGif.style.display = 'block';
downloadGifButton.style.display = 'block';
downloadGifButton.onclick = () => {
const a = document.createElement('a');
a.href = url;
a.download = 'animation.gif';
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
};
statusDiv.textContent = '';
})
.catch(error => {
statusDiv.textContent = 'Error generating GIF: ' + error.message;
console.error('Error generating GIF:', error);
});
}
// Load default images
function loadDefaultImages() {
image1Thumbnail.src = defaultImages['image1'];
image2Thumbnail.src = defaultImages['image2'];
fetch(defaultImages['image1'])
.then(response => response.blob())
.then(blob => {
const file = new File([blob], 'image1_default.png', { type: 'image/png' });
croppedImages['image1'] = file;
});
fetch(defaultImages['image2'])
.then(response => response.blob())
.then(blob => {
const file = new File([blob], 'image2_default.png', { type: 'image/png' });
croppedImages['image2'] = file;
})
.then(() => {
generateGif();
});
}
window.onload = loadDefaultImages;
</script>
</body>
</html>
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