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November 8, 2024 20:09
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Save vesper8/9b515b1a6ac7c7cb44f3389f7c137634 to your computer and use it in GitHub Desktop.
Fullscreen HTML LED stuck pixel / burn-in fixer, inspired by jscreenfix
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| <html lang="en"> | |
| <head> | |
| <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script> | |
| <style> | |
| html, | |
| body { | |
| padding: 0; | |
| margin: 0; | |
| } | |
| </style> | |
| <script> | |
| let fullscreen = false; | |
| let blockSize = 64; | |
| function resizeCanvas() { | |
| const canvas = $("#canvas"); | |
| canvas.width($(window).width()); | |
| canvas.height($(window).height()); | |
| blockSize = canvas.width() / 4; | |
| /* console.log(`canvas width:${canvas.width()}, height:${canvas.height()} | blocksize:${blockSize}`); */ | |
| } | |
| function initBurnFix() { | |
| setInterval(draw, 100); | |
| } | |
| function draw() { | |
| const canvas = $("canvas")[0]; | |
| const context = canvas.getContext("2d"); | |
| const imageData = context.createImageData(blockSize, blockSize); | |
| for (let i = 0; i < blockSize * blockSize; i++) { | |
| const p = i * 4; | |
| imageData.data[p + 0] = Math.random() >= 0.5 ? 255 : 0; | |
| imageData.data[p + 1] = Math.random() >= 0.5 ? 255 : 0; | |
| imageData.data[p + 2] = Math.random() >= 0.5 ? 255 : 0; | |
| imageData.data[p + 3] = 255; | |
| } | |
| for (let y = 0; y < canvas.height; y += blockSize) { | |
| for (let x = 0; x < canvas.width; x += blockSize) { | |
| context.putImageData(imageData, x, y); | |
| } | |
| } | |
| } | |
| function toggleFullscreen() { | |
| if (fullscreen) { | |
| cancelFullscreen(); | |
| } else { | |
| setFullscreen(); | |
| } | |
| setTimeout(() => { | |
| resizeCanvas(); | |
| }, 250); | |
| } | |
| function setFullscreen() { | |
| const element = $("#fixScreen")[0]; | |
| if (element.mozRequestFullScreen) { | |
| element.mozRequestFullScreen(); | |
| fullscreen = true; | |
| } else if (element.webkitRequestFullScreen) { | |
| element.webkitRequestFullScreen(); | |
| fullscreen = true; | |
| } | |
| } | |
| function cancelFullscreen() { | |
| if (document.exitFullscreen) { | |
| document.exitFullscreen(); | |
| } else if (document.mozCancelFullScreen) { | |
| document.mozCancelFullScreen(); | |
| } else if (document.webkitCancelFullScreen) { | |
| document.webkitCancelFullScreen(); | |
| } | |
| fullscreen = false; | |
| } | |
| $(function () { | |
| resizeCanvas(); | |
| initBurnFix(); | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <div id="fixScreen" onclick="toggleFullscreen()"> | |
| <div id="canvasFrame"> | |
| <canvas id="canvas"></canvas> | |
| </div> | |
| </div> | |
| </body> | |
| </html> |
I copied this to a repo so it can be hosted by GitHub pages here https://ysaxon.github.io/screenfix/
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simply save as html and double-click. And then you can click anywhere to toggle fullscreen mode