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gemini_watermark_cleaner
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feat: add userscript

main
Jad 2025-12-20 09:29:00 +08:00
parent a87d111e1b
commit 4c905dcb10
6 changed files with 823 additions and 0 deletions
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15
.gitignore vendored 100644
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# dependencies
node_modules
# misc
.DS_Store
.history
# debug
npm-debug.log*
yarn-debug.log*
yarn-error.log*
# local env files
.env*.local
.env

26
userscript/build.js 100644
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import * as esbuild from 'esbuild';
const banner = `// ==UserScript==
// @name Gemini Watermark Remover
// @namespace https://github.com/journey-ad
// @version 1.0.0
// @description Automatically removes watermarks from Gemini AI generated images
// @author journey-ad
// @match https://gemini.google.com/app/*
// @grant GM_xmlhttpRequest
// @run-at document-start
// ==/UserScript==
`;
await esbuild.build({
entryPoints: ['index.js'],
bundle: true,
outfile: 'dist/gemini-watermark-remover.user.js',
format: 'iife',
banner: { js: banner },
loader: {
'.png': 'dataurl'
}
});
console.log('✓ Build complete: gemini-watermark-remover.user.js');

309
userscript/dist/gemini-watermark-remover.user.js vendored 100644
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188
userscript/index.js 100644
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import { WatermarkEngine } from '../js/core/watermarkEngine.js';
import BG_48_PATH from '../assets/bg_48.png';
import BG_96_PATH from '../assets/bg_96.png';
// ============ DOM UTILITIES ============
function debounce(func, wait) {
let timeout;
return function(...args) {
clearTimeout(timeout);
timeout = setTimeout(() => func.apply(this, args), wait);
};
}
function findGeminiImages() {
return [...document.querySelectorAll('img[src*="googleusercontent.com"]')].filter(isValidGeminiImage);
}
function isValidGeminiImage(img) {
if (/=s\d+\-rj/.test(img.src)) return true;
return img.naturalWidth >= 256 && img.naturalHeight >= 256;
}
// ============ IMAGE PROCESSING ============
let engine = null;
const processingQueue = new Set();
async function processImage(imgElement) {
if (!engine || processingQueue.has(imgElement)) return;
try {
imgElement.dataset.watermarkProcessed = 'processing';
processingQueue.add(imgElement);
if (!isValidGeminiImage(imgElement)) {
imgElement.dataset.watermarkProcessed = 'skipped';
return;
}
const src = imgElement.src;
imgElement.src = '';
imgElement.dataset.src = src;
const blob = await new Promise((resolve, reject) => {
GM_xmlhttpRequest({
method: 'GET',
url: src.replace(/=s\d+.+$/, '=s0'),
responseType: 'blob',
onload: (response) => resolve(response.response),
onerror: reject
});
});
const blobUrl = URL.createObjectURL(blob);
const tempImg = new Image();
await new Promise((resolve, reject) => {
tempImg.onload = resolve;
tempImg.onerror = reject;
tempImg.src = blobUrl;
});
const resultCanvas = await engine.removeWatermarkFromImage(tempImg);
const processedBlob = await new Promise((resolve) => {
resultCanvas.toBlob(resolve, 'image/png');
});
URL.revokeObjectURL(blobUrl);
imgElement.src = URL.createObjectURL(processedBlob);
imgElement.dataset.watermarkProcessed = 'true';
console.log('[Gemini Watermark Remover] Processed image');
} catch (error) {
console.warn('[Gemini Watermark Remover] Failed to process image:', error);
imgElement.dataset.watermarkProcessed = 'failed';
} finally {
processingQueue.delete(imgElement);
}
}
async function processAllImages() {
const images = findGeminiImages();
console.log(`[Gemini Watermark Remover] Found ${images.length} images to process`);
for (const img of images) {
processImage(img);
}
}
// ============ MUTATION OBSERVER ============
function setupMutationObserver() {
const observer = new MutationObserver(debounce(() => {
processAllImages();
}, 100));
observer.observe(document.body, {
childList: true,
subtree: true
});
console.log('[Gemini Watermark Remover] MutationObserver active');
}
// ============ FETCH INTERCEPTION ============
async function processImageBlob(blob) {
const blobUrl = URL.createObjectURL(blob);
const img = new Image();
await new Promise((resolve, reject) => {
img.onload = resolve;
img.onerror = reject;
img.src = blobUrl;
});
const resultCanvas = await engine.removeWatermarkFromImage(img);
URL.revokeObjectURL(blobUrl);
return new Promise((resolve) => {
resultCanvas.toBlob(resolve, 'image/png');
});
}
async function getImage(base64) {
const img = new Image();
img.src = base64;
await new Promise((resolve, reject) => {
img.onload = resolve;
img.onerror = reject;
});
return img;
}
const { fetch: origFetch } = unsafeWindow;
unsafeWindow.fetch = async (...args) => {
const url = typeof args[0] === 'string' ? args[0] : args[0]?.url;
if (/^https:\/\/lh3\.googleusercontent\.com\/rd-gg(-dl)?\//.test(url)) {
console.log('[Gemini Watermark Remover] Intercepting:', url);
const origUrl = url.replace(/=s\d+.+$/, '=s0');
if (typeof args[0] === 'string') {
args[0] = origUrl;
} else if (args[0]?.url) {
args[0].url = origUrl;
}
const response = await origFetch(...args);
if (!engine || !response.ok) {
return response;
}
try {
const blob = await response.blob();
const processedBlob = await processImageBlob(blob);
return new Response(processedBlob, {
status: response.status,
statusText: response.statusText,
headers: response.headers
});
} catch (error) {
console.warn('[Gemini Watermark Remover] Processing failed:', error);
return response;
}
}
return origFetch(...args);
};
// ============ INITIALIZATION ============
async function init() {
try {
console.log('[Gemini Watermark Remover] Initializing...');
engine = new WatermarkEngine({
bg48: await getImage(BG_48_PATH),
bg96: await getImage(BG_96_PATH)
});
await processAllImages();
setupMutationObserver();
console.log('[Gemini Watermark Remover] Ready');
} catch (error) {
console.error('[Gemini Watermark Remover] Initialization failed:', error);
}
}
init();

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userscript/package.json 100644
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{
"type": "module",
"scripts": {
"build": "node build.js"
},
"devDependencies": {
"esbuild": "^0.24.0"
},
"packageManager": "pnpm@10.11.0+sha512.6540583f41cc5f628eb3d9773ecee802f4f9ef9923cc45b69890fb47991d4b092964694ec3a4f738a420c918a333062c8b925d312f42e4f0c263eb603551f977"
}

275
userscript/pnpm-lock.yaml 100644
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lockfileVersion: '9.0'
settings:
autoInstallPeers: true
excludeLinksFromLockfile: false
importers:
.:
devDependencies:
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specifier: ^0.24.0
version: 0.24.2
packages:
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engines: {node: '>=18'}
cpu: [ppc64]
os: [aix]
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engines: {node: '>=18'}
cpu: [arm64]
os: [android]
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engines: {node: '>=18'}
cpu: [arm]
os: [android]
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engines: {node: '>=18'}
cpu: [x64]
os: [android]
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engines: {node: '>=18'}
cpu: [arm64]
os: [darwin]
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engines: {node: '>=18'}
cpu: [x64]
os: [darwin]
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engines: {node: '>=18'}
cpu: [arm64]
os: [freebsd]
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engines: {node: '>=18'}
cpu: [x64]
os: [freebsd]
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engines: {node: '>=18'}
cpu: [arm64]
os: [linux]
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engines: {node: '>=18'}
cpu: [arm]
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engines: {node: '>=18'}
cpu: [ia32]
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engines: {node: '>=18'}
cpu: [loong64]
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engines: {node: '>=18'}
cpu: [ppc64]
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engines: {node: '>=18'}
hasBin: true
snapshots:
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optional: true
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optional: true
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optional: true
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