Automatically apply an HDR-like effect to all images on a webpage with adjustable settings
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// ==UserScript==
// @name Auto HDR
// @namespace http://taeparlaytampermonkey.net/
// @version 14
// @description Automatically apply an HDR-like effect to all images on a webpage with adjustable settings
// @author tae
// @license MIT
// @match *://*/*
// @grant none
// @run-at document-start
// ==/UserScript==
(function() {
'use strict';
// Default settings
let settings = {
hdrEnabled: true,
factor: 1.2, // Reduced factor to prevent over-brightening
excludedSites: []
};
// Load settings from local storage
function loadSettings() {
const savedSettings = localStorage.getItem('autoHDRSettings');
if (savedSettings) {
settings = JSON.parse(savedSettings);
}
}
// Save settings to local storage
function saveSettings() {
localStorage.setItem('autoHDRSettings', JSON.stringify(settings));
}
// Apply HDR-like effect to each image
function applyHDREffect(img) {
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
canvas.width = img.width;
canvas.height = img.height;
context.drawImage(img, 0, 0, img.width, img.height);
let imageData = context.getImageData(0, 0, img.width, img.height);
let data = imageData.data;
for (let i = 0; i < data.length; i += 4) {
data[i] = clamp(data[i] * settings.factor); // Red
data[i + 1] = clamp(data[i + 1] * settings.factor); // Green
data[i + 2] = clamp(data[i + 2] * settings.factor); // Blue
}
context.putImageData(imageData, 0, 0);
img.src = canvas.toDataURL();
img.dataset.hdrApplied = true; // Mark as HDR applied
}
// Helper function to clamp values between 0 and 255
function clamp(value) {
return Math.max(0, Math.min(255, value));
}
// Apply or remove HDR effect based on settings
function toggleHDREffect() {
const images = document.querySelectorAll('img');
images.forEach(img => {
if (settings.hdrEnabled) {
if (!img.dataset.hdrApplied) {
applyHDREffect(img);
}
} else {
if (img.dataset.hdrApplied) {
img.src = img.src; // Reset image source to remove HDR effect
img.removeAttribute('data-hdrApplied');
}
}
});
}
// Check if the current site is excluded
function isSiteExcluded() {
return settings.excludedSites.some(site => window.location.href.includes(site));
}
// Run the functions on page load
window.addEventListener('load', () => {
loadSettings();
if (!isSiteExcluded()) {
toggleHDREffect();
}
});
})();