osu! Logo Template for 2022 /r/place

userscript.user.js

// ==UserScript==
// @name         osu! Logo template
// @namespace    http://tampermonkey.net/
// @version      0.6
// @description  try to take over the canvas!
// @author       oralekin, LittleEndu, ekgame, Wieku, DeadRote
// @match        https://hot-potato.reddit.com/embed*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=reddit.com
// @grant        none
// ==/UserScript==
if (window.top !== window.self) {
    window.addEventListener('load', () => {
        // Load the image
        const image = document.createElement("img");
        const undotted = "https://cdn.discordapp.com/attachments/939592132556124230/960307248633094184/dotted-place-template.1-1.png";
        image.src = "https://cdn.mirai.gg/tmp/dotted-place-template.png";

        image.onload = () => {
             image.style = `position: absolute; left: 0; top: 0; width: ${image.width/3}px; height: ${image.height/3}px; image-rendering: pixelated; z-index: 1`;
        };

        // Add the image as overlay
        const camera = document.querySelector("mona-lisa-embed").shadowRoot.querySelector("mona-lisa-camera");
        const layout = document.querySelector("mona-lisa-embed").shadowRoot;
        const canvas = camera.querySelector("mona-lisa-canvas");
        canvas.shadowRoot.querySelector('.container').appendChild(image);
      
        // Add a style to put a hole in the pixel preview (to see the current or desired color)
        const waitForPreview = setInterval(() => {
            const preview = camera.querySelector("mona-lisa-pixel-preview");
            if (preview) {
              clearInterval(waitForPreview);
              const style = document.createElement('style')
              style.innerHTML = '.pixel { clip-path: polygon(-20% -20%, -20% 120%, 37% 120%, 37% 37%, 62% 37%, 62% 62%, 37% 62%, 37% 120%, 120% 120%, 120% -20%); }'
              preview.shadowRoot.appendChild(style);
              loadRegions()
              setTimeout(()=>{
                  loadRegions();
                  if(typeof regionInterval == "undefined") {
                      const regionInterval = setInterval(()=>{
                          loadRegions()
                      },5000)
                      }
              },1000)
            }
        }, 100);
        //Insert element after another element
        function insertAfter(newNode, referenceNode) {
            referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
        }

        //Slider initialization
        function initSlider(){
            let visSlider = document.createElement("div");

            visSlider.style = `
                     position: fixed;
                     left: calc(var(--sail) + 16px);
                     right: calc(var(--sair) + 16px);
                     display: flex;
                     flex-flow: row nowrap;
                     align-items: center;
                     justify-content: center;
                     height: 40px;
                     top: calc(var(--sait) + 48px);
                     text-shadow: black 1px 0 10px;
                     text-align:center;
                `;

            //Text
            let visText = document.createElement("div");
            visText.innerText = "Highlight zones";
            visSlider.appendChild(visText);

            let lineSeparator = document.createElement("br");
            visSlider.appendChild(lineSeparator);

            //Range slider input
            let visInput = document.createElement("input");
            visInput.setAttribute("type","range");
            visInput.setAttribute("id","visRange");
            visInput.setAttribute("name","range");
            visInput.setAttribute("min","0");
            visInput.setAttribute("max","100");
            visInput.setAttribute("step","1");
            visInput.value = 0;

            //Range slider label (name)
            let visLabel = document.createElement("label");
            visLabel.innerText = '0'


            visSlider.appendChild(visInput);
            visSlider.appendChild(visLabel);

            var inputEvtHasNeverFired = true;

            var rangeValue = {current: undefined, mostRecent: undefined};

            visInput.addEventListener("input", function(evt) {
                inputEvtHasNeverFired = false;
                rangeValue.current = evt.target.value;
                if (rangeValue.current !== rangeValue.mostRecent) {
                    visInput.value = rangeValue.current;
                    visLabel.innerText = rangeValue.current+'';
                    placeGlobal.visLevel = rangeValue.current/100;
                    placeGlobal.svgMask.style.opacity = placeGlobal.visLevel+'';
                }
                rangeValue.mostRecent = rangeValue.current;
            });

            let topControls = document.querySelector("mona-lisa-embed").shadowRoot.querySelector(".layout .top-controls");
            insertAfter(visSlider,topControls);
            placeGlobal.slider = visSlider;
        }

        //Generate SVG function
        function generateSVG(){
            let svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
            svg.setAttribute("width","2000px");
            svg.setAttribute("height","2000px");
            svg.style = `
            position: absolute;
            left: 0;
            top: 0;
            z-index: 1;
            opacity: `+placeGlobal.visLevel+`;`;

            let svgDefs = document.createElementNS('http://www.w3.org/2000/svg', 'defs');
            svg.appendChild(svgDefs);

            let mask = document.createElementNS('http://www.w3.org/2000/svg', 'mask');
            mask.setAttribute("id","osuplaceMask");
            svgDefs.appendChild(mask);

            let mainMask = document.createElementNS("http://www.w3.org/2000/svg", 'rect');
            mainMask.setAttribute('x', "0");
            mainMask.setAttribute("y","0");
            mainMask.setAttribute('height', "100%");
            mainMask.setAttribute('width', "100%");
            mainMask.setAttribute('fill', 'white');
            mask.appendChild(mainMask);

            let imageMask = document.createElementNS("http://www.w3.org/2000/svg", 'image');
            imageMask.setAttribute('href',undotted)
            imageMask.setAttribute('x', "0");
            imageMask.setAttribute("y","0");
            imageMask.setAttribute('height', "100%");
            imageMask.setAttribute('width', "100%");
            mask.appendChild(imageMask);

            let svgBody = document.createElementNS('http://www.w3.org/2000/svg', 'g');
            svgBody.setAttribute("width","2000px");
            svgBody.setAttribute("height","2000px");
            svgBody.setAttribute("x","0");
            svgBody.setAttribute("y","0");
            svg.appendChild(svgBody);

            let bodyRect = document.createElementNS('http://www.w3.org/2000/svg', 'rect');
            bodyRect.setAttribute("width","2000px");
            bodyRect.setAttribute("height","2000px");
            bodyRect.setAttribute("x","0");
            bodyRect.setAttribute("y","0");
            bodyRect.setAttribute("fill","rgba(0,0,0,0.6)");
            bodyRect.setAttribute("mask","url(#osuplaceMask)")
            svgBody.appendChild(bodyRect);

            return svg
        }

        //Global variables
        var placeGlobal = {
            visLevel: 0,
            slider: null,
            svgMask: null
        }

        //Load mask
        function loadRegions(){
            if(placeGlobal.svgMask != null){
                placeGlobal.svgMask.remove();
            }

            let svgClipBody = generateSVG();

            placeGlobal.svgMask = svgClipBody;

            //Generate slider UI

            //if(placeGlobal.slider == null ){
                let sliderState = layout.contains(layout.querySelector('#visRange'));
                if(!sliderState){
                    initSlider();
                }
            //}

            canvas.shadowRoot.querySelector('.container').appendChild(svgClipBody);
        }

    }, false);
}

i added a hotkey (ctrl+i) to reload the overlay without having to reload the page, may be helpful when reddit servers are dying: https://gist.github.com/ngoduyanh/0026c9e54060d56e21dd20904a6d79fb

With this, I'm quite sure you guys will run into the same issue that happened with me, on subsequent loads of the image, it keeps getting smaller and smaller.

Image.width and image.height, should be changed to image.naturalWidth and image.naturalHeight. So that it uses the intrinsic size of the image, and not the size of the element.

I added a settings menu with the option to customize the url: https://gist.github.com/kebien6020/9eda7b69d0a147532bb99258538f9d4d

It opens from a blue dot at the bottom right

I added a settings menu with the option to customize the url: https://gist.github.com/kebien6020/9eda7b69d0a147532bb99258538f9d4d

It opens from a blue dot at the bottom right

Did the same as well throughout the day

https://gist.github.com/Igneom/1a63744cbaba5980fee2bdcf8f6ac55e

It's giving me "To protect your security, hot-potato.reddit.com will not allow Firefox to display the page if another site has embedded it. To see this page, you need to open it in a new window.", which then doesn't load either

I added a refresh button that doesn't require reload. I attached random numbers to the url for cache busting. It uses the image code to rebuild which could be nicer. Doesn't require any special permissions. https://gist.github.com/Wetbikeboy2500/e4e41f5799669ac05bbfab2cba3c2ea8