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<!DOCTYPE html>
<html lang="zh-TW">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>8-bit 像素藝術轉換器</title>
<script src="https://cdn.tailwindcss.com"></script>
<style>
/* 確保像素繪製時邊緣清晰，不會模糊 */
canvas {
image-rendering: pixelated; /* Chrome, Edge */
image-rendering: crisp-edges; /* Firefox */
}
.retro-font {
font-family: 'Courier New', Courier, monospace;
letter-spacing: -0.5px;
}
/* 模擬 CRT 螢幕掃描線效果 (選用) */
.scanlines {
background: linear-gradient(
to bottom,
rgba(255,255,255,0),
rgba(255,255,255,0) 50%,
rgba(0,0,0,0.1) 50%,
rgba(0,0,0,0.1)
);
background-size: 100% 4px;
}
/* 程式碼區塊樣式 */
.code-preview {
background-color: #1e1e1e;
color: #9cdcfe;
font-family: 'Consolas', 'Monaco', monospace;
font-size: 12px;
white-space: pre;
overflow-x: auto;
}
/* 自定義捲軸 */
::-webkit-scrollbar {
width: 8px;
height: 8px;
}
::-webkit-scrollbar-track {
background: #2d2d2d;
}
::-webkit-scrollbar-thumb {
background: #555;
border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
background: #777;
}
</style>
</head>
<body class="bg-slate-900 text-slate-200 min-h-screen flex flex-col font-sans">
<!-- Header -->
<header class="bg-slate-800 p-4 border-b border-slate-700 shadow-lg relative z-20">
<div class="container mx-auto flex flex-col md:flex-row justify-between items-center gap-4">
<h1 class="text-2xl md:text-3xl font-bold text-green-400 retro-font flex items-center gap-2">
<span class="text-3xl">👾</span> 8-BIT 轉換器
</h1>
<div class="flex gap-4 items-center">
<p class="text-sm text-slate-400 hidden md:block">將圖片轉為 8-bit 並匯出程式碼</p>
<!-- View App Source Button (Original) -->
<button id="viewSourceBtn" class="bg-slate-700 hover:bg-slate-600 text-slate-300 text-xs py-2 px-3 rounded border border-slate-600 flex items-center gap-2 transition-colors">
</> 網頁源碼
</button>
</div>
</div>
</header>
<!-- Main Content -->
<main class="flex-grow container mx-auto p-4 md:p-6 flex flex-col lg:flex-row gap-6 relative z-10">
<!-- Controls Panel -->
<div class="w-full lg:w-1/3 bg-slate-800 p-6 rounded-xl shadow-xl h-fit border border-slate-700">
<div class="space-y-6">
<!-- Upload -->
<div>
<div class="flex justify-between items-center mb-2">
<label class="block text-sm font-bold text-slate-300">1. 上傳圖片</label>
<!-- Rotate Button -->
<button id="rotateBtn" disabled class="text-xs bg-slate-700 hover:bg-slate-600 disabled:opacity-50 disabled:cursor-not-allowed text-white py-1 px-2 rounded transition-colors flex items-center gap-1">
<svg xmlns="http://www.w3.org/2000/svg" class="h-3 w-3" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
</svg>
旋轉 90°
</button>
</div>
<div class="relative group">
<input type="file" id="imageInput" accept="image/*" class="absolute inset-0 w-full h-full opacity-0 cursor-pointer z-10">
<div class="border-2 border-dashed border-slate-500 rounded-lg p-6 text-center group-hover:border-green-400 transition-colors bg-slate-700/50">
<svg xmlns="http://www.w3.org/2000/svg" class="h-10 w-10 mx-auto text-slate-400 mb-2 group-hover:text-green-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
</svg>
<span class="text-sm text-slate-300" id="fileName">點擊或拖曳圖片至此</span>
</div>
</div>
</div>
<!-- Settings -->
<div>
<label class="block text-sm font-bold text-slate-300 mb-4">2. 調整參數</label>
<!-- Pixel Size -->
<div class="mb-5">
<div class="flex justify-between mb-1">
<span class="text-xs text-slate-400">像素大小 (影響解析度)</span>
<span class="text-xs font-mono text-green-400" id="pixelSizeVal">8px</span>
</div>
<input type="range" id="pixelSize" min="2" max="32" value="8" step="1"
class="w-full h-2 bg-slate-600 rounded-lg appearance-none cursor-pointer accent-green-500 hover:accent-green-400">
</div>
<!-- Palette Size -->
<div class="mb-5">
<div class="flex justify-between mb-1">
<span class="text-xs text-slate-400">色彩深度 (顏色數量)</span>
<span class="text-xs font-mono text-green-400" id="paletteVal">16 色</span>
</div>
<input type="range" id="paletteSize" min="2" max="64" value="16" step="2"
class="w-full h-2 bg-slate-600 rounded-lg appearance-none cursor-pointer accent-purple-500 hover:accent-purple-400">
</div>
<!-- Contrast -->
<div class="mb-5">
<div class="flex justify-between mb-1">
<span class="text-xs text-slate-400">對比度</span>
<span class="text-xs font-mono text-green-400" id="contrastVal">0%</span>
</div>
<input type="range" id="contrast" min="-50" max="50" value="10" step="5"
class="w-full h-2 bg-slate-600 rounded-lg appearance-none cursor-pointer accent-blue-500 hover:accent-blue-400">
</div>
</div>
<!-- Actions -->
<div class="pt-4 border-t border-slate-700 grid grid-cols-2 gap-3">
<button id="downloadBtn" disabled class="col-span-1 bg-slate-700 hover:bg-slate-600 disabled:opacity-50 disabled:cursor-not-allowed text-white font-bold py-3 px-2 rounded-lg transition-colors flex justify-center items-center gap-2 text-sm">
<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
</svg>
下載圖片
</button>
<button id="exportCodeBtn" disabled class="col-span-1 bg-green-600 hover:bg-green-500 disabled:bg-slate-700 disabled:text-slate-500 disabled:cursor-not-allowed text-white font-bold py-3 px-2 rounded-lg transition-colors flex justify-center items-center gap-2 text-sm shadow-lg border border-green-700">
<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 20l4-16m4 4l4 4-4 4M6 16l-4-4 4-4" />
</svg>
取得圖像代碼
</button>
</div>
</div>
</div>
<!-- Preview Panel -->
<div class="w-full lg:w-2/3 bg-black rounded-xl overflow-hidden shadow-2xl border-4 border-slate-700 flex flex-col relative">
<!-- Canvas Container -->
<div class="flex-grow flex items-center justify-center p-4 bg-slate-900 overflow-auto relative min-h-[400px]" id="canvasContainer">
<!-- Placeholder text -->
<div id="placeholderText" class="text-center">
<p class="text-6xl mb-4 opacity-20">👾</p>
<p class="text-slate-500">請先上傳圖片</p>
</div>
<!-- The Canvas -->
<canvas id="canvas" class="hidden max-w-full max-h-[80vh] shadow-lg"></canvas>
</div>
<!-- Stats Bar -->
<div class="bg-slate-800 p-2 text-xs text-slate-400 flex justify-between px-4 border-t border-slate-700 font-mono">
<span id="dims">0 x 0</span>
<span id="gridDims">Grid: 0 x 0</span>
</div>
</div>
</main>
<!-- App Source Modal (Hidden by default) -->
<div id="appSourceModal" class="fixed inset-0 bg-black/80 z-50 hidden flex items-center justify-center backdrop-blur-sm p-4">
<div class="bg-slate-800 w-full max-w-4xl h-[85vh] rounded-lg shadow-2xl flex flex-col border border-slate-600">
<div class="flex justify-between items-center p-4 border-b border-slate-700 bg-slate-800 rounded-t-lg">
<h3 class="text-lg font-bold text-white">網頁原始碼 (HTML/JS)</h3>
<button class="closeAppSource text-slate-400 hover:text-white"><svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path></svg></button>
</div>
<div class="flex-grow overflow-hidden relative bg-[#1e1e1e]">
<textarea id="appSourceDisplay" class="w-full h-full bg-[#1e1e1e] text-[#d4d4d4] p-4 font-mono text-xs resize-none focus:outline-none" readonly></textarea>
</div>
<div class="p-4 border-t border-slate-700 flex justify-end">
<button id="copyAppSourceBtn" class="bg-blue-600 hover:bg-blue-500 text-white font-bold py-2 px-4 rounded">複製代碼</button>
</div>
</div>
</div>
<!-- Pixel Data Export Modal -->
<div id="pixelCodeModal" class="fixed inset-0 bg-black/80 z-50 hidden flex items-center justify-center backdrop-blur-sm p-4">
<div class="bg-slate-900 w-full max-w-5xl h-[90vh] rounded-lg shadow-2xl flex flex-col border border-green-900/50">
<!-- Header -->
<div class="flex justify-between items-center p-4 border-b border-slate-800 bg-slate-900 rounded-t-lg">
<div class="flex items-center gap-3">
<h3 class="text-lg font-bold text-green-400 flex items-center gap-2">
<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 9l3 3-3 3m5 0h3M5 20h14a2 2 0 002-2V6a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z" />
</svg>
圖像代碼生成 (Pixel Data)
</h3>
<div class="flex bg-slate-800 rounded-md p-1">
<button class="format-btn active px-3 py-1 text-xs rounded hover:bg-slate-700 text-white bg-slate-600 transition-colors" data-format="js">JS Array</button>
<button class="format-btn px-3 py-1 text-xs rounded hover:bg-slate-700 text-slate-400 transition-colors" data-format="css">CSS Box-Shadow</button>
<button class="format-btn px-3 py-1 text-xs rounded hover:bg-slate-700 text-slate-400 transition-colors" data-format="json">JSON</button>
</div>
</div>
<button id="closePixelModal" class="text-slate-400 hover:text-white transition-colors">
<svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
</svg>
</button>
</div>
<!-- Code Area -->
<div class="flex-grow overflow-hidden relative bg-[#1e1e1e]">
<textarea id="pixelCodeDisplay" class="w-full h-full bg-[#1e1e1e] text-[#9cdcfe] p-4 font-mono text-xs resize-none focus:outline-none" readonly spellcheck="false"></textarea>
</div>
<!-- Footer -->
<div class="p-4 border-t border-slate-800 bg-slate-900 rounded-b-lg flex justify-between items-center">
<div class="text-xs text-slate-500" id="codeStats">
<!-- Stats will be injected here -->
</div>
<div class="flex gap-3">
<span id="copyPixelFeedback" class="text-green-400 text-sm self-center opacity-0 transition-opacity">已複製成功！</span>
<button id="copyPixelCodeBtn" class="bg-green-600 hover:bg-green-500 text-white font-bold py-2 px-6 rounded transition-colors flex items-center gap-2">
<svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" />
</svg>
複製代碼
</button>
</div>
</div>
</div>
</div>
<script>
// --- Elements ---
const imageInput = document.getElementById('imageInput');
const fileNameDisplay = document.getElementById('fileName');
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
const placeholder = document.getElementById('placeholderText');
const dimsDisplay = document.getElementById('dims');
const gridDimsDisplay = document.getElementById('gridDims');
const downloadBtn = document.getElementById('downloadBtn');
const exportCodeBtn = document.getElementById('exportCodeBtn');
const rotateBtn = document.getElementById('rotateBtn'); // New Button
// App Source Modal
const viewSourceBtn = document.getElementById('viewSourceBtn');
const appSourceModal = document.getElementById('appSourceModal');
const appSourceDisplay = document.getElementById('appSourceDisplay');
const copyAppSourceBtn = document.getElementById('copyAppSourceBtn');
// Pixel Code Modal
const pixelCodeModal = document.getElementById('pixelCodeModal');
const closePixelModal = document.getElementById('closePixelModal');
const pixelCodeDisplay = document.getElementById('pixelCodeDisplay');
const copyPixelCodeBtn = document.getElementById('copyPixelCodeBtn');
const copyPixelFeedback = document.getElementById('copyPixelFeedback');
const formatBtns = document.querySelectorAll('.format-btn');
const codeStats = document.getElementById('codeStats');
// Controls
const pixelSizeInput = document.getElementById('pixelSize');
const paletteSizeInput = document.getElementById('paletteSize');
const contrastInput = document.getElementById('contrast');
// Value Displays
const pixelSizeVal = document.getElementById('pixelSizeVal');
const paletteVal = document.getElementById('paletteVal');
const contrastVal = document.getElementById('contrastVal');
// State
let originalImage = null;
let processedPixelData = null; // Stores {width, height, data: [r,g,b,a...]}
let currentFormat = 'js';
// --- Event Listeners ---
imageInput.addEventListener('change', handleImageUpload);
[pixelSizeInput, paletteSizeInput, contrastInput].forEach(input => {
input.addEventListener('input', () => {
updateLabels();
if (originalImage) processImage();
});
});
// Rotate Logic
rotateBtn.addEventListener('click', () => {
if (!originalImage) return;
rotateImage90();
});
downloadBtn.addEventListener('click', () => {
if(!canvas) return;
const link = document.createElement('a');
link.download = '8bit-image.png';
link.href = canvas.toDataURL();
link.click();
});
// App Source Logic
viewSourceBtn.addEventListener('click', () => {
const htmlContent = "<!DOCTYPE html>\n" + document.documentElement.outerHTML;
appSourceDisplay.value = htmlContent;
appSourceModal.classList.remove('hidden');
});
document.querySelectorAll('.closeAppSource').forEach(btn => {
btn.addEventListener('click', () => appSourceModal.classList.add('hidden'));
});
copyAppSourceBtn.addEventListener('click', () => copyToClipboard(appSourceDisplay, null));
// Pixel Code Logic
exportCodeBtn.addEventListener('click', () => {
if(!processedPixelData) return;
updatePixelCodeView();
pixelCodeModal.classList.remove('hidden');
});
closePixelModal.addEventListener('click', () => pixelCodeModal.classList.add('hidden'));
copyPixelCodeBtn.addEventListener('click', () => copyToClipboard(pixelCodeDisplay, copyPixelFeedback));
// Format Switching
formatBtns.forEach(btn => {
btn.addEventListener('click', (e) => {
formatBtns.forEach(b => {
b.classList.remove('active', 'bg-slate-600', 'text-white');
b.classList.add('text-slate-400');
});
e.target.classList.add('active', 'bg-slate-600', 'text-white');
e.target.classList.remove('text-slate-400');
currentFormat = e.target.dataset.format;
updatePixelCodeView();
});
});
function copyToClipboard(textarea, feedbackEl) {
textarea.select();
textarea.setSelectionRange(0, 99999);
navigator.clipboard.writeText(textarea.value).then(() => {
if(feedbackEl) showFeedback(feedbackEl);
}).catch(() => {
document.execCommand('copy');
if(feedbackEl) showFeedback(feedbackEl);
});
}
function showFeedback(el) {
el.classList.remove('opacity-0');
setTimeout(() => el.classList.add('opacity-0'), 2000);
}
function updateLabels() {
pixelSizeVal.innerText = `${pixelSizeInput.value}px`;
paletteVal.innerText = `${paletteSizeInput.value} 色`;
contrastVal.innerText = `${contrastInput.value}%`;
}
function handleImageUpload(e) {
const file = e.target.files[0];
if (!file) return;
fileNameDisplay.innerText = file.name;
const reader = new FileReader();
reader.onload = function(event) {
const img = new Image();
img.onload = function() {
// Update state
originalImage = img;
// Enable UI
placeholder.classList.add('hidden');
canvas.classList.remove('hidden');
downloadBtn.disabled = false;
exportCodeBtn.disabled = false;
rotateBtn.disabled = false; // Enable rotate
processImage();
}
img.src = event.target.result;
}
reader.readAsDataURL(file);
}
// --- Rotation Logic ---
function rotateImage90() {
// Create a temporary canvas to handle the rotation
const tempCanvas = document.createElement('canvas');
const w = originalImage.width;
const h = originalImage.height;
// Swap dimensions for 90 degree rotation
tempCanvas.width = h;
tempCanvas.height = w;
const tempCtx = tempCanvas.getContext('2d');
// Move to center to rotate
tempCtx.translate(tempCanvas.width / 2, tempCanvas.height / 2);
tempCtx.rotate(90 * Math.PI / 180); // Rotate 90 degrees
tempCtx.drawImage(originalImage, -w / 2, -h / 2);
// Create a new image from the rotated canvas
const newImg = new Image();
newImg.onload = function() {
originalImage = newImg;
processImage(); // Re-process with the rotated image
};
newImg.src = tempCanvas.toDataURL();
}
// --- Core Image Processing ---
function processImage() {
if (!originalImage) return;
const pixelSize = parseInt(pixelSizeInput.value);
const paletteFactor = parseInt(paletteSizeInput.value);
const contrast = parseInt(contrastInput.value);
const w = originalImage.width;
const h = originalImage.height;
const smallW = Math.ceil(w / pixelSize);
const smallH = Math.ceil(h / pixelSize);
// Offscreen canvas for processing
const offCanvas = document.createElement('canvas');
offCanvas.width = smallW;
offCanvas.height = smallH;
const offCtx = offCanvas.getContext('2d');
offCtx.imageSmoothingEnabled = false;
offCtx.drawImage(originalImage, 0, 0, smallW, smallH);
// Pixel Manipulation
const imageData = offCtx.getImageData(0, 0, smallW, smallH);
const data = imageData.data;
const contrastFactor = (259 * (contrast + 255)) / (255 * (259 - contrast));
const step = 255 / (paletteFactor - 1);
for (let i = 0; i < data.length; i += 4) {
let r = data[i];
let g = data[i+1];
let b = data[i+2];
// Contrast
r = clamp((contrastFactor * (r - 128)) + 128);
g = clamp((contrastFactor * (g - 128)) + 128);
b = clamp((contrastFactor * (b - 128)) + 128);
// Quantization
r = Math.round(r / step) * step;
g = Math.round(g / step) * step;
b = Math.round(b / step) * step;
data[i] = r;
data[i+1] = g;
data[i+2] = b;
}
offCtx.putImageData(imageData, 0, 0);
// Save processed data for export
processedPixelData = {
width: smallW,
height: smallH,
data: data // Reference to the modified Uint8ClampedArray
};
// Render to Main Canvas
canvas.width = w;
canvas.height = h;
ctx.imageSmoothingEnabled = false;
ctx.drawImage(offCanvas, 0, 0, smallW, smallH, 0, 0, canvas.width, canvas.height);
dimsDisplay.innerText = `${w} x ${h} px`;
gridDimsDisplay.innerText = `Grid: ${smallW}x${smallH}`;
}
function clamp(value) {
return Math.max(0, Math.min(255, value));
}
function rgbToHex(r, g, b, a) {
if (a === 0) return null; // Transparent
return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1).toUpperCase();
}
// --- Code Generation Logic ---
function updatePixelCodeView() {
if (!processedPixelData) return;
const { width, height, data } = processedPixelData;
let output = "";
let statsText = `Matrix size: ${width} x ${height} (${width*height} pixels)`;
if (currentFormat === 'js') {
output = generateJSArray(width, height, data);
} else if (currentFormat === 'css') {
output = generateCSS(width, height, data);
} else if (currentFormat === 'json') {
output = generateJSON(width, height, data);
}
pixelCodeDisplay.value = output;
codeStats.innerText = statsText;
}
function generateJSArray(w, h, data) {
let s = `// ${w}x${h} Pixel Art Matrix\nconst sprite = [\n`;
for (let y = 0; y < h; y++) {
s += " [";
for (let x = 0; x < w; x++) {
const idx = (y * w + x) * 4;
const hex = rgbToHex(data[idx], data[idx+1], data[idx+2], data[idx+3]);
// Use 'null' for transparent or hex string
s += hex ? `"${hex}"` : "null";
if (x < w - 1) s += ", ";
}
s += "],\n";
}
s += "];";
return s;
}
function generateCSS(w, h, data) {
// Generates a single-element CSS pixel art using box-shadow
let shadows = [];
let pixelSize = 1; // logical pixel unit in the CSS
for (let y = 0; y < h; y++) {
for (let x = 0; x < w; x++) {
const idx = (y * w + x) * 4;
const hex = rgbToHex(data[idx], data[idx+1], data[idx+2], data[idx+3]);
if (hex) {
shadows.push(`${(x+1)*pixelSize}px ${(y+1)*pixelSize}px 0 ${hex}`);
}
}
}
return `/* CSS Pixel Art (Single Div) */
.pixel-art {
width: ${pixelSize}px;
height: ${pixelSize}px;
background-color: transparent;
box-shadow: \n ${shadows.join(',\n ')};
}`;
}
function generateJSON(w, h, data) {
let pixels = [];
for (let i = 0; i < data.length; i += 4) {
const hex = rgbToHex(data[i], data[i+1], data[i+2], data[i+3]);
pixels.push(hex);
}
const obj = {
width: w,
height: h,
pixels: pixels
};
return JSON.stringify(obj, null, 2);
}
</script>
</body>
</html>