tools/gif-rounded-corners.html at main · mathspp/tools · GitHub

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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>GIF Rounded Corners</title>
    <link rel="stylesheet" href="styles.css">
    <style>
        body {
            max-width: 960px;
            margin: 0 auto;
            padding: clamp(1.5rem, 3vw, 2.5rem) clamp(1.25rem, 3vw, 2.75rem) clamp(3rem, 4vw, 4rem);
        }

        header {
            margin-bottom: clamp(1.25rem, 3vw, 2.25rem);
        }

        .grid {
            display: grid;
            gap: 1rem;
        }

        .tool-card {
            padding: clamp(1.25rem, 3vw, 1.75rem);
        }

        .preview-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1rem;
        }

        .preview {
            border: 1px dashed var(--ui-2);
            border-radius: 12px;
            padding: 0.75rem;
            background: var(--bg-2);
            min-height: 220px;
            display: grid;
            place-items: center;
            text-align: center;
        }

        .preview img {
            max-width: 100%;
            height: auto;
        }

        .controls {
            display: grid;
            gap: 1rem;
            grid-template-columns: 1fr;
        }

        .controls .inline {
            display: grid;
            gap: 0.75rem;
            grid-template-columns: 1fr;
        }

        .actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            align-items: center;
        }

        .status {
            margin: 0.25rem 0 0;
            color: var(--tx-3);
            min-height: 1.25rem;
        }

        .download-link[aria-disabled="true"] {
            pointer-events: none;
            color: var(--tx-3);
        }

        @media (min-width: 720px) {
            .preview-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

            .controls .inline {
                grid-template-columns: 2fr 1fr;
                align-items: end;
            }
        }
    </style>
</head>

<body>
    <header class="page-header">
        <a class="site-link" href="https://tools.mathspp.com/" aria-label="Back to tools.mathspp.com">← tools.mathspp.com</a>
        <h1>GIF Rounded Corners</h1>
        <p class="lead">Upload a square GIF, choose a corner radius, and download the animation with transparent rounded corners.</p>
    </header>

    <main class="grid">
        <section class="surface tool-card">
            <div class="controls">
                <div class="form-group">
                    <label for="gif-input">GIF file</label>
                    <input type="file" id="gif-input" accept="image/gif">
                    <p class="status" id="file-status">Select a square GIF to begin.</p>
                </div>

                <div class="inline">
                    <div class="form-group">
                        <label for="radius-input">Corner radius (pixels)</label>
                        <input type="number" id="radius-input" min="0" step="1" value="24">
                        <p class="status">Pixels to keep inside each rounded corner.</p>
                    </div>
                    <div class="actions">
                        <button id="process-button" type="button" disabled>Round corners</button>
                        <a id="download-link" class="download-link" href="#" aria-disabled="true">Download rounded GIF</a>
                    </div>
                </div>

                <p class="status" id="process-status" aria-live="polite"></p>
            </div>
        </section>

        <section class="surface tool-card">
            <div class="preview-grid">
                <div class="preview" id="original-preview" aria-label="Original GIF preview">
                    <p class="status">Original GIF preview appears here.</p>
                </div>
                <div class="preview" id="result-preview" aria-label="Rounded GIF preview">
                    <p class="status">Processed GIF preview will appear here.</p>
                </div>
            </div>
        </section>
    </main>

    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/gifuct.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/gif.js/0.2.0/gif.js" integrity="sha512-nNOFtIS+H0lwgdUDaPn/g1ssw3uN9AkEM7zy2wLaTQeLQNeNiitUcLpEpDIh3Z4T22MdeTNru/SQbNM4ig2rng==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
    <script>
        (() => {
            const fileInput = document.getElementById('gif-input');
            const radiusInput = document.getElementById('radius-input');
            const processButton = document.getElementById('process-button');
            const processStatus = document.getElementById('process-status');
            const fileStatus = document.getElementById('file-status');
            const downloadLink = document.getElementById('download-link');
            const originalPreview = document.getElementById('original-preview');
            const resultPreview = document.getElementById('result-preview');

            let selectedFile = null;

            function resetResult() {
                resultPreview.innerHTML = '<p class="status">Processed GIF preview will appear here.</p>';
                downloadLink.setAttribute('aria-disabled', 'true');
                downloadLink.removeAttribute('download');
                downloadLink.href = '#';
            }

            function roundedRectPath(ctx, width, height, radius) {
                const r = Math.max(0, Math.min(radius, Math.min(width, height) / 2));
                ctx.beginPath();
                ctx.moveTo(r, 0);
                ctx.lineTo(width - r, 0);
                ctx.quadraticCurveTo(width, 0, width, r);
                ctx.lineTo(width, height - r);
                ctx.quadraticCurveTo(width, height, width - r, height);
                ctx.lineTo(r, height);
                ctx.quadraticCurveTo(0, height, 0, height - r);
                ctx.lineTo(0, r);
                ctx.quadraticCurveTo(0, 0, r, 0);
                ctx.closePath();
            }

            fileInput.addEventListener('change', () => {
                resetResult();
                processStatus.textContent = '';
                const [file] = fileInput.files;
                if (!file) {
                    selectedFile = null;
                    fileStatus.textContent = 'Select a square GIF to begin.';
                    processButton.disabled = true;
                    originalPreview.innerHTML = '<p class="status">Original GIF preview appears here.</p>';
                    return;
                }

                if (file.type !== 'image/gif') {
                    selectedFile = null;
                    fileStatus.textContent = 'Please choose a GIF file.';
                    processButton.disabled = true;
                    originalPreview.innerHTML = '<p class="status">Original GIF preview appears here.</p>';
                    return;
                }

                selectedFile = file;
                fileStatus.textContent = `${file.name} selected (${(file.size / 1024).toFixed(1)} KB).`;
                processButton.disabled = false;

                const previewImg = document.createElement('img');
                previewImg.alt = 'Original GIF';
                previewImg.src = URL.createObjectURL(file);
                originalPreview.innerHTML = '';
                originalPreview.appendChild(previewImg);
            });

            async function processGif() {
                if (!selectedFile) return;

                const radius = Number(radiusInput.value) || 0;
                processStatus.textContent = 'Processing GIF...';
                processButton.disabled = true;
                downloadLink.setAttribute('aria-disabled', 'true');

                try {
                    const arrayBuffer = await selectedFile.arrayBuffer();
                    const gifuct = window.gifuct || window.GIFuct;
                    if (!gifuct || !gifuct.parseGIF || !gifuct.decompressFrames) {
                        throw new Error('GIF parsing library failed to load. Please retry or check your connection.');
                    }

                    const gif = gifuct.parseGIF(arrayBuffer);
                    const frames = gifuct.decompressFrames(gif, true);
                    if (!frames.length) {
                        throw new Error('No frames found in the GIF.');
                    }

                    const { width, height } = frames[0].dims;
                    if (width !== height) {
                        throw new Error(`GIF must be square. This one is ${width}x${height}.`);
                    }

                    const canvas = document.createElement('canvas');
                    canvas.width = width;
                    canvas.height = height;
                    const ctx = canvas.getContext('2d');

                    const gifEncoder = new GIF({
                        workers: 2,
                        quality: 10,
                        width,
                        height,
                        transparent: 'rgba(0,0,0,0)'
                    });

                    const minDelay = 20;

                    frames.forEach(frame => {
                        ctx.clearRect(0, 0, width, height);
                        const imageData = new ImageData(new Uint8ClampedArray(frame.patch), width, height);
                        ctx.putImageData(imageData, 0, 0);
                        ctx.save();
                        ctx.globalCompositeOperation = 'destination-in';
                        roundedRectPath(ctx, width, height, radius);
                        ctx.fill();
                        ctx.restore();

                        const delayMs = Math.max((frame.delay || 2) * 10, minDelay);
                        gifEncoder.addFrame(ctx, { copy: true, delay: delayMs });
                    });

                    gifEncoder.on('finished', blob => {
                        const objectUrl = URL.createObjectURL(blob);
                        const resultImg = document.createElement('img');
                        resultImg.alt = 'Rounded GIF preview';
                        resultImg.src = objectUrl;
                        resultPreview.innerHTML = '';
                        resultPreview.appendChild(resultImg);

                        downloadLink.href = objectUrl;
                        downloadLink.download = `rounded-${selectedFile.name}`;
                        downloadLink.setAttribute('aria-disabled', 'false');
                        processStatus.textContent = 'Done! Download your rounded GIF below.';
                        processButton.disabled = false;
                    });

                    gifEncoder.render();
                } catch (error) {
                    console.error(error);
                    processStatus.textContent = error.message || 'Something went wrong while rounding the GIF. Please try another file.';
                    processButton.disabled = false;
                }
            }

            processButton.addEventListener('click', processGif);
        })();
    </script>
</body>

</html>