268 lines
11 KiB
HTML
268 lines
11 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<!-- <img src="/images/test_8x8.png" id="test_image" style="display:none;"> -->
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<img src="/images/sked_tree_32x32.png" id="test_image" style="display:none;">
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<script src="/js/canvas_util.js"></script>
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<script src="/js/color_utils.js"></script>
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<style>
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#content_wrapper{
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display: flex;
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flex-direction: column;
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}
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</style>
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</head>
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<body>
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<div id="content_wrapper">
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<div id="orig_colors_wrapper"></div>
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<div id="color_compare_wrapper"></div>
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<div id="preview_wrapper"></div>
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</div>
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</body>
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</html>
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<script>
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window.ROTATION_CACHE = {};
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window.SCORE_CACHE = {};
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window.onload = () => {
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const p0 = 30;
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const p1 = 40;
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const p2 = 50;
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const p3 = 60;
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const p4 = 70;
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const offset = 50;
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const to = -40;
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const testArr = [
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[Math.PI * 0.000, test_image, `calc(${p2}% - ${offset}px)`, `calc(${p4}% - ${offset + to}px)`],
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[Math.PI * 0.825, test_image, `calc(${p1}% - ${offset}px)`, `calc(${p0}% - ${offset + to}px)`],
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// [Math.PI * 0.750, test_image, `calc(${p0}% - ${offset}px)`, `calc(${p0}% - ${offset + to}px)`],
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// [Math.PI * 0.625, test_image, `calc(${p0}% - ${offset}px)`, `calc(${p1}% - ${offset + to}px)`],
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// [Math.PI * 0.500, test_image, `calc(${p0}% - ${offset}px)`, `calc(${p2}% - ${offset + to}px)`],
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// [Math.PI * 0.375, test_image, `calc(${p0}% - ${offset}px)`, `calc(${p3}% - ${offset + to}px)`],
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// [Math.PI * 0.250, test_image, `calc(${p0}% - ${offset}px)`, `calc(${p4}% - ${offset + to}px)`],
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// [Math.PI * 0.125, test_image, `calc(${p1}% - ${offset}px)`, `calc(${p4}% - ${offset + to}px)`],
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// [Math.PI *-0.125, test_image, `calc(${p3}% - ${offset}px)`, `calc(${p4}% - ${offset + to}px)`],
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// [Math.PI *-0.250, test_image, `calc(${p4}% - ${offset}px)`, `calc(${p4}% - ${offset + to}px)`],
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// [Math.PI *-0.375, test_image, `calc(${p4}% - ${offset}px)`, `calc(${p3}% - ${offset + to}px)`],
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// [Math.PI *-0.500, test_image, `calc(${p4}% - ${offset}px)`, `calc(${p2}% - ${offset + to}px)`],
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// [Math.PI *-0.625, test_image, `calc(${p4}% - ${offset}px)`, `calc(${p1}% - ${offset + to}px)`],
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// [Math.PI *-0.750, test_image, `calc(${p4}% - ${offset}px)`, `calc(${p0}% - ${offset + to}px)`],
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// [Math.PI *-0.825, test_image, `calc(${p3}% - ${offset}px)`, `calc(${p0}% - ${offset + to}px)`],
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// [Math.PI *-1.000, test_image, `calc(${p2}% - ${offset}px)`, `calc(${p0}% - ${offset + to}px)`],
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];
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const canvasArr = testArr.map(n=>canvasRotateTest(...n));
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canvasArr.forEach(canvas=>{
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preview_wrapper.appendChild(canvas);
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});
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insertOrigColors();
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}
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function insertOrigColors(){
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Object.keys(window.ORIG_IMAGE_META.colorCounts).forEach(colorStr=>{
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const div = document.createElement('div');
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const size = 42;
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div.innerHTML = `\
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<div style="float:left;margin:1px;">
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<div style="float:left;width:${size}px;height:${size}px;background-color:${colorStr}"></div>
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</div>`;
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div.onclick = () => {
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//////console.log('scores === ',scores);
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}
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orig_colors_wrapper.appendChild(div);
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});
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}
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function canvasRotateTest(radians = 0, testImage, left, top) {
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if(radians === 0)window.ORIG_IMAGE_META = imageMeta(testImage);
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const canvas = document.createElement('canvas');
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// const w = 1000;
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// const h = 1000;
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// const p = 100;
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const rotationCacheKey = `${testImage.src}_${radians}`;
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const rotationCacheKey0 = `${testImage.src}_${0}`;
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//////console.log('rotationCacheKey, rotationCacheKey0 === ',rotationCacheKey, rotationCacheKey0);
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const p = 1;
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const x = p;
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const y = p;
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const w = (testImage.width + (p*2)) ?? 100;
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const h = (testImage.height + (p*2)) ?? 100;
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const sw = testImage.width;
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const sh = testImage.height;
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const sw2 = sw/2;
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const sh2 = sh/2;
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const sr = [x,y,sw,sh];
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const center = [sr[0] + sw2, sr[1] + sh2];
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canvas.width = w;
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canvas.height = h;
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const ctx = canvas.getContext('2d');
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ctx.save();
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ctx.translate(center[0],center[1]);
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ctx.fillStyle = "#fff";
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ctx.rotate(radians);
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ctx.translate(-center[0],-center[1]);
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ctx.lineWidth = 10;
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ctx.strokeStyle = "#000";
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if(testImage) {
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ctx.drawImage(testImage, sr[0], sr[1]);
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} else {
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ctx.strokeRect(...sr);
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}
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canvas.style.imageRendering = "pixelated";
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canvas.style.transform = `scale(4)`;
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canvas.style.position = "fixed";
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canvas.style.top = top;
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canvas.style.left = left;
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if(radians==0)return canvas;
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const imageData = ctx.getImageData(0,0,w,h);
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const colorCounts = countImageDataColors(imageData);
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const uniqueColors = Object.keys(colorCounts);
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const uniqueFullColors = Object.keys(colorCounts).filter(n=>n.includes(",255)"));
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//////console.log('uniqueFullColors === ',uniqueFullColors);
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const bestMatches = {};
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uniqueFullColors.forEach(colorStr=>{
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const rgb = colorToRGB(colorStr);
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const orig = window.ROTATION_CACHE[rotationCacheKey0] ?? {uniqueFullColors:[...uniqueFullColors]};
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let minScore = Infinity;
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let maxScore = -Infinity;
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let minScoreChampion;
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let maxScoreChampion;
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const scores = orig.uniqueFullColors.map(origColor=>{
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const origRgb = colorToRGB(origColor);
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const scoreKey = `${rgb.r},${rgb.g},${rgb.b}_${origRgb.r},${origRgb.g},${origRgb.b}`;
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// //////console.log('rgb, origRgb === ',rgb, origRgb);
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const score = window.SCORE_CACHE[scoreKey] ?? similarColours(rgb, origRgb);//TODO: find a fire wizard to optimize this
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window.SCORE_CACHE[scoreKey] = score;
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const betterMinScore = minScore > score;
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const betterMaxScore = maxScore < score;
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if(betterMinScore) {
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minScore = score;
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minScoreChampion = origRgb;
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}
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if(betterMaxScore) {
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maxScore = score;
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maxScoreChampion = origRgb;
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}
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return score;
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});
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bestMatches[colorStr] = {
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min:minScoreChampion,
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max:maxScoreChampion,
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scores
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};
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});
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for(let i = 0; i < imageData.data.length;i += 4) {// <-- NOTE the 4 here
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const r = imageData.data[i];
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const g = imageData.data[i+1];
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const b = imageData.data[i+2];
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const a = imageData.data[i+3];//TODO: perf diffs between overwriting 'a' vs ignoring it
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const rgbStr = `rgba(${r},${g},${b},${a})`;
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const meta = bestMatches[rgbStr];
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if(meta) {
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// const bestRgb = meta.max;
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const bestRgb = meta.min;
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if(a === 255){
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imageData.data[i] = bestRgb.r;
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imageData.data[i+1] = bestRgb.g;
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imageData.data[i+2] = bestRgb.b;
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} else { // probably not needed since a<255 colors are not currently added to bestMatches
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//////console.log('alpha < 255');
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imageData.data[i] = 0;
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imageData.data[i+1] = 0;
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imageData.data[i+2] = 0;
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imageData.data[i+3] = 0;
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}
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} else if (a < 255) {
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imageData.data[i] = 0;
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imageData.data[i+1] = 0;
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imageData.data[i+2] = 0;
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imageData.data[i+3] = 0;
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}
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// //////console.log('meta === ',meta);
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}
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ctx.putImageData(imageData,0,0);
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//////console.log('bestMatches === ',bestMatches);
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//////console.log('uniqueColors.length === ', uniqueColors.length);
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//////console.log('uniqueFullColors.length === ', uniqueFullColors.length);
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window.ROTATION_CACHE[(!window.ROTATION_CACHE[rotationCacheKey0]) ? rotationCacheKey0 : rotationCacheKey] = {
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canvas,
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ctx,
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imageData,
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uniqueColors,
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uniqueFullColors,
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bestMatches
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};
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const color_compare_row = document.createElement('div');
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color_compare_row.style.display = "flex";
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color_compare_row.style.borderBottom = "2px solid black";
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color_compare_row.style.marginBottom = "2x";
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color_compare_row.setAttribute("class","color-compare-row");
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Object.keys(bestMatches).forEach(colorStr=>{
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const div = document.createElement('div');
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const {min,max,scores} = bestMatches[colorStr];
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const minMatchColor = `rgba(${min.r},${min.g},${min.b},255)`;
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const maxMatchColor = `rgba(${max.r},${max.g},${max.b},255)`;
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div.innerHTML = `\
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<div style="display:flex;margin:1px;">
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<div style="width:10px;height:20px;background-color:${colorStr}"></div>
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<div style="width:10px;height:20px;background-color:${minMatchColor}"></div>
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</div>`;
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div.onclick = () => {
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////console.log('scores === ',scores);
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}
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color_compare_row.appendChild(div);
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});
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color_compare_wrapper.appendChild(color_compare_row);
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color_compare_wrapper.setAttribute("class","color-compare-wrapper");
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return canvas;
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}
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function countImageDataColors(imageData) {
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const w = imageData.width;
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const h = imageData.height;
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const colorCounts = {};
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const startTime = window.performance.now();
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for (let x = 0; x < w; x++) {
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for (let y = 0; y < h; y++) {
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const i = (x + y * w) * 4;
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const r = imageData.data[i];
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const g = imageData.data[i + 1];
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const b = imageData.data[i + 2];
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const a = imageData.data[i + 3];
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const key = `rgba(${r},${g},${b},${a})`;
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if (!colorCounts[key]) colorCounts[key] = 0;
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colorCounts[key]++;
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}
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}
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const endTime = window.performance.now();
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////console.log('Count ImageData Colors duration (ms) === ',endTime - startTime);
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return colorCounts;
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}
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function imageMeta(img) {
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const canvas = imageToCanvas(img);
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const ctx = canvas.getContext('2d');
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const imageData = ctx.getImageData(0,0,img.width,img.height);
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return {
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img,
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colorCounts: countImageDataColors(imageData),
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};
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}
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function imageToCanvas(img) {
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const canvas = document.createElement('canvas');
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canvas.width = img.width;
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canvas.height = img.height;
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const ctx = canvas.getContext('2d');
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ctx.drawImage(img, 0, 0);
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return canvas;
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}
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</script> |