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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" />
<meta name="description" content="Interactive demo of ppu-ocv — a type-safe, chainable image processing library built on OpenCV.js" />
<title>ppu-ocv — Interactive Demo</title>
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet" />
<style>
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
--bg-primary: #0a0a0f;
--bg-secondary: #12121a;
--bg-card: #1a1a26;
--bg-card-hover: #22222e;
--border: #2a2a3a;
--border-active: #6366f1;
--text-primary: #e8e8f0;
--text-secondary: #9898b0;
--text-muted: #68688a;
--accent: #6366f1;
--accent-glow: rgba(99, 102, 241, 0.25);
--accent-secondary: #818cf8;
--success: #34d399;
--warning: #fbbf24;
--error: #f87171;
--radius: 12px;
--radius-sm: 8px;
--radius-xs: 6px;
--shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
--transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
--sidebar-w: 280px;
}
body {
font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
background: var(--bg-primary);
color: var(--text-primary);
min-height: 100vh;
line-height: 1.6;
-webkit-font-smoothing: antialiased;
}
/* --- Top Bar --- */
.topbar {
background: linear-gradient(180deg, rgba(99, 102, 241, 0.08) 0%, transparent 100%);
border-bottom: 1px solid var(--border);
padding: 1rem 1.5rem;
display: flex;
align-items: center;
gap: 1rem;
flex-wrap: wrap;
position: sticky;
top: 0;
z-index: 100;
backdrop-filter: blur(12px);
background-color: rgba(10, 10, 15, 0.85);
}
.topbar-brand {
display: flex; align-items: center; gap: 0.6rem;
font-size: 1rem; font-weight: 700; letter-spacing: -0.02em;
color: var(--text-primary); margin-right: auto;
}
.topbar-brand svg { width: 18px; height: 18px; color: var(--accent-secondary); }
.topbar-badge {
font-size: 0.65rem; font-weight: 500;
padding: 0.2rem 0.55rem;
background: rgba(99, 102, 241, 0.12);
border: 1px solid rgba(99, 102, 241, 0.2);
border-radius: 100px;
color: var(--accent-secondary);
}
.topbar-links {
display: flex; align-items: center; gap: 0.75rem; margin-left: 0.5rem;
}
.topbar-links a {
color: var(--text-secondary); transition: color var(--transition);
display: flex; align-items: center; justify-content: center;
}
.topbar-links a:hover { color: var(--text-primary); }
.topbar-links svg { width: 18px; height: 18px; }
.status-indicator {
display: flex; align-items: center; gap: 0.5rem;
font-size: 0.75rem; color: var(--text-secondary);
}
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-muted); flex-shrink: 0; }
.status-dot.ready { background: var(--success); box-shadow: 0 0 8px rgba(52, 211, 153, 0.4); }
.status-dot.loading { background: var(--warning); animation: pulse 1.2s ease-in-out infinite; }
.status-dot.error { background: var(--error); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
/* Upload row */
.upload-row {
display: flex; align-items: center; gap: 0.75rem;
}
.btn-upload {
display: flex; align-items: center; gap: 0.4rem;
padding: 0.5rem 1rem; border: 1px solid var(--border);
border-radius: var(--radius-sm);
background: var(--bg-card); color: var(--text-primary);
font-family: inherit; font-size: 0.8rem; font-weight: 500;
cursor: pointer; transition: all var(--transition);
}
.btn-upload:hover { border-color: var(--accent); background: var(--bg-card-hover); }
.btn-upload svg { width: 15px; height: 15px; }
.btn-process {
display: flex; align-items: center; gap: 0.4rem;
padding: 0.5rem 1.2rem; border: none; border-radius: var(--radius-sm);
background: linear-gradient(135deg, var(--accent) 0%, #4f46e5 100%);
color: white; font-family: inherit; font-size: 0.8rem; font-weight: 600;
cursor: pointer; transition: all var(--transition);
}
.btn-process:hover { transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); }
.btn-process:active { transform: translateY(0); }
.btn-process:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }
.file-name {
font-size: 0.75rem; color: var(--text-muted);
font-family: 'JetBrains Mono', monospace;
max-width: 200px; overflow: hidden;
text-overflow: ellipsis; white-space: nowrap;
}
#file-input { display: none; }
/* --- Main Layout --- */
.app {
display: grid;
grid-template-columns: var(--sidebar-w) 1fr;
height: calc(100vh - 57px); /* minus topbar */
}
@media (max-width: 800px) {
.app { grid-template-columns: 1fr; height: auto; }
.sidebar { max-height: 40vh; }
}
/* --- Sidebar --- */
.sidebar {
border-right: 1px solid var(--border);
background: var(--bg-secondary);
overflow-y: auto;
padding: 1rem;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.section-title {
font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
letter-spacing: 0.06em; color: var(--text-muted);
margin-bottom: 0.6rem; padding: 0 0.25rem;
}
.pipeline-list { display: flex; flex-direction: column; gap: 0.35rem; list-style: none; }
.pipeline-item {
display: flex; align-items: center; gap: 0.5rem;
padding: 0.45rem 0.6rem; background: var(--bg-card);
border: 1px solid var(--border); border-radius: var(--radius-xs);
cursor: pointer; transition: all var(--transition); user-select: none;
flex-wrap: wrap;
}
.pipeline-item:hover { background: var(--bg-card-hover); border-color: var(--border-active); }
.pipeline-item.active { border-color: var(--accent); background: rgba(99, 102, 241, 0.08); }
.pipeline-checkbox {
appearance: none; -webkit-appearance: none;
width: 16px; height: 16px; border: 2px solid var(--border);
border-radius: 3px; background: var(--bg-primary);
cursor: pointer; position: relative; flex-shrink: 0;
transition: all var(--transition);
}
.pipeline-checkbox:checked { background: var(--accent); border-color: var(--accent); }
.pipeline-checkbox:checked::after {
content: ''; position: absolute; left: 3px; top: 0px;
width: 5px; height: 8px; border: solid white;
border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.pipeline-label { font-size: 0.78rem; font-weight: 500; color: var(--text-primary); flex: 1; }
.pipeline-order {
font-size: 0.6rem; font-weight: 600; width: 18px; height: 18px;
display: flex; align-items: center; justify-content: center;
border-radius: 4px; background: rgba(99, 102, 241, 0.12); color: var(--accent-secondary);
}
.param-group { width: 100%; margin-top: 0.3rem; padding: 0.4rem 0.5rem; background: var(--bg-primary); border-radius: var(--radius-xs); }
.param-row { display: flex; align-items: center; justify-content: space-between; }
.param-label { font-size: 0.68rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }
.param-value { font-size: 0.68rem; color: var(--accent-secondary); font-family: 'JetBrains Mono', monospace; }
.param-slider {
-webkit-appearance: none; appearance: none; width: 100%; height: 3px;
background: var(--border); border-radius: 2px; margin-top: 0.25rem;
}
.param-slider::-webkit-slider-thumb {
-webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%;
background: var(--accent); cursor: pointer; box-shadow: 0 0 0 3px var(--accent-glow);
}
/* --- Content Area --- */
.content {
display: flex; flex-direction: column;
overflow-y: auto;
}
/* Canvas area */
.canvas-area {
flex: 1; display: grid;
grid-template-columns: 1fr 1fr;
gap: 1px; background: var(--border);
min-height: 0;
}
@media (max-width: 600px) { .canvas-area { grid-template-columns: 1fr; } }
.canvas-panel {
position: relative; background: var(--bg-primary);
display: flex; align-items: center; justify-content: center;
overflow: hidden; min-height: 250px;
}
.canvas-panel canvas { max-width: 100%; max-height: 100%; display: block; object-fit: contain; }
.canvas-label {
position: absolute; top: 0.6rem; left: 0.6rem;
padding: 0.2rem 0.6rem; background: rgba(0, 0, 0, 0.55);
backdrop-filter: blur(8px); border-radius: 100px;
font-size: 0.65rem; font-weight: 500; color: var(--text-secondary); z-index: 2;
}
.placeholder {
display: flex; flex-direction: column; align-items: center; justify-content: center;
gap: 0.5rem; text-align: center; color: var(--text-muted);
}
.placeholder svg { width: 36px; height: 36px; opacity: 0.25; }
.placeholder p { font-size: 0.78rem; }
.timing-badge {
position: absolute; bottom: 0.6rem; right: 0.6rem;
padding: 0.2rem 0.6rem; background: rgba(0, 0, 0, 0.55);
backdrop-filter: blur(8px); border-radius: 100px;
font-size: 0.65rem; font-family: 'JetBrains Mono', monospace;
color: var(--success); z-index: 2; display: none;
}
/* --- Code Section (bottom, full width) --- */
.code-section {
border-top: 1px solid var(--border);
background: var(--bg-secondary);
padding: 0.75rem 1rem;
}
.code-header {
display: flex; align-items: center; justify-content: space-between;
margin-bottom: 0.5rem;
}
.code-title {
font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
letter-spacing: 0.06em; color: var(--text-muted);
}
.btn-copy {
display: flex; align-items: center; gap: 0.35rem;
padding: 0.3rem 0.7rem; border: 1px solid var(--border);
border-radius: var(--radius-xs); background: var(--bg-card);
color: var(--text-secondary); font-family: inherit;
font-size: 0.7rem; font-weight: 500; cursor: pointer;
transition: all var(--transition);
}
.btn-copy:hover { border-color: var(--accent); color: var(--text-primary); }
.btn-copy.copied { border-color: var(--success); color: var(--success); }
.btn-copy svg { width: 13px; height: 13px; }
.code-block {
background: var(--bg-primary); border: 1px solid var(--border); border-radius: var(--radius-sm);
padding: 0.75rem 1rem; overflow-x: auto;
font-family: 'JetBrains Mono', monospace; font-size: 0.73rem; line-height: 1.7;
color: var(--text-secondary); white-space: pre;
}
.code-block .kw { color: #c792ea; }
.code-block .fn { color: #82aaff; }
.code-block .str { color: #c3e88d; }
.code-block .num { color: #f78c6c; }
.code-block .cm { color: #546e7a; }
/* Dropzone overlay */
.dropzone-overlay {
position: fixed; inset: 0; z-index: 999;
background: rgba(99, 102, 241, 0.08);
border: 3px dashed var(--accent);
display: none; align-items: center; justify-content: center;
pointer-events: none;
}
.dropzone-overlay.visible { display: flex; }
.dropzone-overlay-text {
padding: 1rem 2rem; background: var(--bg-card);
border-radius: var(--radius); font-size: 1rem;
font-weight: 600; color: var(--accent-secondary);
box-shadow: var(--shadow);
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.3s ease-out forwards; }
</style>
</head>
<body>
<!-- Full-page drop overlay -->
<div class="dropzone-overlay" id="drop-overlay">
<div class="dropzone-overlay-text">📷 Drop image to process</div>
</div>
<!-- Top Bar -->
<nav class="topbar">
<div class="topbar-brand">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polygon points="12 2 22 8.5 22 15.5 12 22 2 15.5 2 8.5 12 2"/><line x1="12" y1="22" x2="12" y2="15.5"/><polyline points="22 8.5 12 15.5 2 8.5"/></svg>
ppu-ocv
<span class="topbar-badge">v2.0.0</span>
<div class="topbar-links">
<a href="https://github.com/PT-Perkasa-Pilar-Utama/ppu-ocv" target="_blank" rel="noopener noreferrer" title="GitHub">
<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37 0 0 0-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44 0 0 0 20 4.77 5.07 5.07 0 0 0 19.91 1S18.73.65 16 2.48a13.38 13.38 0 0 0-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07 0 0 0 5 4.77a5.44 5.44 0 0 0-1.5 3.78c0 5.42 3.3 6.61 6.44 7A3.37 3.37 0 0 0 9 18.13V22"></path></svg>
</a>
<a href="https://www.npmjs.com/package/ppu-ocv" target="_blank" rel="noopener noreferrer" title="npm">
<svg viewBox="0 0 24 24" fill="currentColor"><path d="M0 7.334v8h6.666v1.332H12v-1.332h12v-8H0zm6.666 6.664H3.334v-4h3.332v4zm4 1.336H8V8.668h2.666v6.666zm10.666-1.336H14.666v-4h2.666v4h1.334v-4h2.666v4z"/></svg>
</a>
</div>
</div>
<div class="upload-row">
<button class="btn-upload" id="btn-upload">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="17 8 12 3 7 8"/><line x1="12" y1="3" x2="12" y2="15"/></svg>
Upload Image
</button>
<span class="file-name" id="file-name"></span>
<input type="file" id="file-input" accept="image/*" />
<button class="btn-process" id="btn-process" disabled>▶ Process</button>
</div>
<div class="status-indicator">
<div class="status-dot loading" id="status-dot"></div>
<span id="status-text">Loading OpenCV…</span>
</div>
</nav>
<!-- App Layout -->
<div class="app">
<!-- Sidebar: Pipeline Config -->
<aside class="sidebar">
<div class="section-title">Pipeline Operations</div>
<ul class="pipeline-list">
<li class="pipeline-item active">
<input class="pipeline-checkbox" type="checkbox" id="op-grayscale" checked />
<label class="pipeline-label" for="op-grayscale">Grayscale</label>
<span class="pipeline-order">1</span>
</li>
<li class="pipeline-item active">
<input class="pipeline-checkbox" type="checkbox" id="op-blur" checked />
<label class="pipeline-label" for="op-blur">Gaussian Blur</label>
<span class="pipeline-order">2</span>
<div class="param-group">
<div class="param-row">
<span class="param-label">size</span>
<span class="param-value" id="blur-val">5</span>
</div>
<input class="param-slider" type="range" id="blur-size" min="1" max="31" step="2" value="5" />
</div>
</li>
<li class="pipeline-item active">
<input class="pipeline-checkbox" type="checkbox" id="op-threshold" checked />
<label class="pipeline-label" for="op-threshold">Threshold</label>
<span class="pipeline-order">3</span>
</li>
<li class="pipeline-item">
<input class="pipeline-checkbox" type="checkbox" id="op-invert" />
<label class="pipeline-label" for="op-invert">Invert</label>
<span class="pipeline-order">4</span>
</li>
<li class="pipeline-item">
<input class="pipeline-checkbox" type="checkbox" id="op-canny" />
<label class="pipeline-label" for="op-canny">Canny Edge</label>
<span class="pipeline-order">5</span>
</li>
<li class="pipeline-item">
<input class="pipeline-checkbox" type="checkbox" id="op-dilate" />
<label class="pipeline-label" for="op-dilate">Dilate</label>
<span class="pipeline-order">6</span>
<div class="param-group">
<div class="param-row">
<span class="param-label">size</span>
<span class="param-value" id="dilate-val">3</span>
</div>
<input class="param-slider" type="range" id="dilate-size" min="1" max="21" step="2" value="3" />
</div>
</li>
<li class="pipeline-item">
<input class="pipeline-checkbox" type="checkbox" id="op-erode" />
<label class="pipeline-label" for="op-erode">Erode</label>
<span class="pipeline-order">7</span>
</li>
</ul>
</aside>
<!-- Main Content -->
<div class="content">
<!-- Canvas Results (always visible) -->
<div class="canvas-area">
<div class="canvas-panel" id="original-panel">
<div class="canvas-label">Original</div>
<div class="placeholder" id="original-placeholder">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg>
<p>Upload an image to begin</p>
</div>
<canvas id="original-canvas" style="display:none;"></canvas>
</div>
<div class="canvas-panel" id="result-panel">
<div class="canvas-label">Processed</div>
<div class="placeholder" id="result-placeholder">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M12 3h7a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-7m0-18H5a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h7m0-18v18"/></svg>
<p>Result will appear here</p>
</div>
<canvas id="result-canvas" style="display:none;"></canvas>
<div class="timing-badge" id="timing-badge"></div>
</div>
</div>
<!-- Code Preview (full width, bottom) -->
<div class="code-section">
<div class="code-header">
<span class="code-title">Generated Code</span>
<button class="btn-copy" id="btn-copy">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>
<span id="copy-label">Copy</span>
</button>
</div>
<pre class="code-block" id="code-preview"></pre>
<!-- Hidden element for copy-to-clipboard (plain text) -->
<textarea id="code-raw" style="position:absolute;left:-9999px;" aria-hidden="true"></textarea>
</div>
</div>
</div>
<script type="module">
let ImageProcessor, cv;
try {
// Try local build first (for development)
const local = await import('./lib/index.web.js');
ImageProcessor = local.ImageProcessor;
cv = local.cv;
} catch (e) {
// Fallback to npm CDN if local build is missing or deployed to GH Pages
console.log("Local build not found, falling back to CDN...");
const cdn = await import('https://cdn.jsdelivr.net/npm/ppu-ocv@2/index.web.js');
ImageProcessor = cdn.ImageProcessor;
cv = cdn.cv;
}
// -- DOM refs --
const btnUpload = document.getElementById('btn-upload');
const fileInput = document.getElementById('file-input');
const fileNameEl = document.getElementById('file-name');
const btnProcess = document.getElementById('btn-process');
const statusDot = document.getElementById('status-dot');
const statusText = document.getElementById('status-text');
const originalCanvas = document.getElementById('original-canvas');
const resultCanvas = document.getElementById('result-canvas');
const origPlaceholder = document.getElementById('original-placeholder');
const resultPlaceholder = document.getElementById('result-placeholder');
const codePreview = document.getElementById('code-preview');
const codeRaw = document.getElementById('code-raw');
const timingBadge = document.getElementById('timing-badge');
const blurSlider = document.getElementById('blur-size');
const blurValEl = document.getElementById('blur-val');
const dilateSlider = document.getElementById('dilate-size');
const dilateValEl = document.getElementById('dilate-val');
const dropOverlay = document.getElementById('drop-overlay');
const btnCopy = document.getElementById('btn-copy');
const copyLabel = document.getElementById('copy-label');
let loadedImage = null;
// -- Init OpenCV --
try {
await ImageProcessor.initRuntime();
setStatus('ready', 'Ready');
} catch (err) {
setStatus('error', 'OpenCV failed');
console.error(err);
}
function setStatus(state, text) {
statusDot.className = 'status-dot ' + state;
statusText.textContent = text;
}
// -- Upload --
btnUpload.addEventListener('click', () => fileInput.click());
fileInput.addEventListener('change', (e) => {
if (e.target.files.length > 0) handleFile(e.target.files[0]);
});
// -- Full-page drag & drop --
let dragCounter = 0;
document.addEventListener('dragenter', (e) => { e.preventDefault(); dragCounter++; dropOverlay.classList.add('visible'); });
document.addEventListener('dragleave', (e) => { e.preventDefault(); dragCounter--; if (dragCounter <= 0) { dragCounter = 0; dropOverlay.classList.remove('visible'); } });
document.addEventListener('dragover', (e) => e.preventDefault());
document.addEventListener('drop', (e) => {
e.preventDefault();
dragCounter = 0;
dropOverlay.classList.remove('visible');
if (e.dataTransfer.files.length > 0) handleFile(e.dataTransfer.files[0]);
});
async function handleFile(file) {
if (!file.type.startsWith('image/')) { setStatus('error', 'Invalid file'); return; }
setStatus('loading', 'Loading…');
fileNameEl.textContent = file.name;
const arrayBuffer = await file.arrayBuffer();
const blob = new Blob([arrayBuffer], { type: file.type });
const url = URL.createObjectURL(blob);
const img = new Image();
img.onload = () => {
loadedImage = img;
originalCanvas.width = img.width;
originalCanvas.height = img.height;
originalCanvas.getContext('2d').drawImage(img, 0, 0);
originalCanvas.style.display = 'block';
origPlaceholder.style.display = 'none';
URL.revokeObjectURL(url);
btnProcess.disabled = false;
setStatus('ready', `${img.width}×${img.height}`);
};
img.src = url;
}
// -- Sliders --
blurSlider.addEventListener('input', () => { blurValEl.textContent = blurSlider.value; updateCodePreview(); });
dilateSlider.addEventListener('input', () => { dilateValEl.textContent = dilateSlider.value; updateCodePreview(); });
// -- Checkboxes --
document.querySelectorAll('.pipeline-checkbox').forEach((cb) => {
cb.addEventListener('change', () => {
cb.closest('.pipeline-item').classList.toggle('active', cb.checked);
updateCodePreview();
});
});
// -- Steps --
function getActiveSteps() {
const steps = [];
if (document.getElementById('op-grayscale').checked) steps.push({ name: 'grayscale' });
if (document.getElementById('op-blur').checked) {
const bsz = parseInt(blurSlider.value);
steps.push({ name: 'blur', opts: { size: [bsz, bsz] } });
}
if (document.getElementById('op-threshold').checked) steps.push({ name: 'threshold' });
if (document.getElementById('op-invert').checked) steps.push({ name: 'invert' });
if (document.getElementById('op-canny').checked) steps.push({ name: 'canny' });
if (document.getElementById('op-dilate').checked) {
const sz = parseInt(dilateSlider.value);
steps.push({ name: 'dilate', opts: { size: [sz, sz] } });
}
if (document.getElementById('op-erode').checked) steps.push({ name: 'erode' });
return steps;
}
// -- Code preview --
function updateCodePreview() {
const steps = getActiveSteps();
let raw = `import { ImageProcessor } from "ppu-ocv/web";\n\n`;
raw += `const processor = new ImageProcessor(canvas);\n`;
let html = `<span class="kw">import</span> { ImageProcessor } <span class="kw">from</span> <span class="str">"ppu-ocv/web"</span>;\n\n`;
html += `<span class="kw">const</span> processor = <span class="kw">new</span> <span class="fn">ImageProcessor</span>(canvas);\n`;
if (steps.length === 0) {
raw += `// No operations selected\n`;
html += `<span class="cm">// No operations selected</span>\n`;
} else {
for (const s of steps) {
if (s.opts) {
const optsStr = JSON.stringify(s.opts);
raw += `processor.${s.name}(${optsStr});\n`;
const htmlOpts = optsStr
.replace(/"([^"]+)":/g, '<span class="str">$1</span>: ')
.replace(/(\d+)/g, '<span class="num">$1</span>');
html += `processor.<span class="fn">${s.name}</span>(${htmlOpts});\n`;
} else {
raw += `processor.${s.name}();\n`;
html += `processor.<span class="fn">${s.name}</span>();\n`;
}
}
}
raw += `\nconst result = processor.toCanvas();\nprocessor.destroy();`;
html += `\n<span class="kw">const</span> result = processor.<span class="fn">toCanvas</span>();\nprocessor.<span class="fn">destroy</span>();`;
codePreview.innerHTML = html;
codeRaw.value = raw;
}
// -- Copy --
btnCopy.addEventListener('click', async () => {
try {
await navigator.clipboard.writeText(codeRaw.value);
copyLabel.textContent = 'Copied!';
btnCopy.classList.add('copied');
setTimeout(() => { copyLabel.textContent = 'Copy'; btnCopy.classList.remove('copied'); }, 1500);
} catch {
// Fallback
codeRaw.select();
document.execCommand('copy');
copyLabel.textContent = 'Copied!';
setTimeout(() => { copyLabel.textContent = 'Copy'; }, 1500);
}
});
// -- Process --
btnProcess.addEventListener('click', async () => {
if (!loadedImage) return;
const steps = getActiveSteps();
if (steps.length === 0) { setStatus('error', 'Select an operation'); return; }
btnProcess.disabled = true;
setStatus('loading', 'Processing…');
await new Promise(r => requestAnimationFrame(r));
try {
const t0 = performance.now();
const srcCanvas = document.createElement('canvas');
srcCanvas.width = loadedImage.width;
srcCanvas.height = loadedImage.height;
srcCanvas.getContext('2d').drawImage(loadedImage, 0, 0);
const processor = new ImageProcessor(srcCanvas);
for (const step of steps) processor.execute(step.name, step.opts);
const output = processor.toCanvas();
const elapsed = (performance.now() - t0).toFixed(1);
resultCanvas.width = output.width;
resultCanvas.height = output.height;
resultCanvas.getContext('2d').drawImage(output, 0, 0);
resultCanvas.style.display = 'block';
resultPlaceholder.style.display = 'none';
resultCanvas.className = 'fade-in';
timingBadge.textContent = `${elapsed} ms`;
timingBadge.style.display = 'block';
processor.destroy();
setStatus('ready', `Done in ${elapsed}ms`);
} catch (err) {
console.error(err);
setStatus('error', err.message);
} finally {
btnProcess.disabled = false;
}
});
updateCodePreview();
</script>
</body>
</html>