31:T4d2,viewof modified = { const f = html` `, w = f.querySelector('.w'), h = f.querySelector('.h'), locked = f.querySelector('.locked'), update_f = () => { f.value = { width: parseInt( w.value ), height: parseInt( h.value ) }; }, update_w = () => { if ( locked.checked ) { h.value = Math.round( ( original.height / original.width ) * parseInt( w.value ) ); } update_f(); }, update_h = () => { if ( locked.checked ) { w.value = Math.round( ( original.width / original.height ) * parseInt( h.value ) ); } update_f(); }; w.addEventListener('input', update_w); h.addEventListener('input', update_h); update_f(); return f; }32:[] 2f:{"title":"EXIF resolution calculator","cells":[{"id":0,"value":"md`# EXIF resolution calculator`","pinned":false,"hidden":false,"mode":"ojs"},{"id":212,"value":"md`Arbitrarily scale images on the web using EXIF([tool](https://exiftool.org)). See: Allow an image to indicate its own density and correct its intrinsic size.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":57,"value":"viewof filePath = { \n const f = html`File Path: `,\n i = f.querySelector('input'),\n update = () => {\n f.value = i.value;\n };\n i.addEventListener('input', update);\n update();\n return f;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":2,"value":"viewof original = { \n const f = html`\n

Original resource dimensions\n Width:\n \n \n Height:\n \n \n`,\n w = f.querySelector('.w'),\n h = f.querySelector('.h'),\n update = () => {\n f.value = {\n width: parseInt( w.value ),\n height: parseInt( h.value )\n };\n };\n [ w, h ].forEach( ( i ) => {\n i.addEventListener( 'input', update )\n } );\n update();\n return f;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":85,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":47,"value":"html`

exiftool \\\\\n  -ResolutionUnit=inches \\\\\n  -XResolution=${ xResolution } \\\\\n  -YResolution=${ yResolution } \\\\\n  -ExifImageWidth=${ modified.width } \\\\\n  -ExifImageHeight=${ modified.height } \\\\\n  ${ filePath }

`","pinned":false,"hidden":false,"mode":"ojs"},{"id":205,"value":"md`---`","pinned":false,"hidden":false,"mode":"ojs"},{"id":130,"value":"// Reduce a fraction by finding the Greatest Common Divisor and dividing by it.\n// https://stackoverflow.com/questions/4652468/is-there-a-javascript-function-that-reduces-a-fraction\nfunction reduce(numerator,denominator){\n var gcd = function gcd(a,b){\n return b ? gcd(b, a%b) : a;\n };\n gcd = gcd(numerator,denominator);\n return [numerator/gcd, denominator/gcd];\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":41,"value":"yResolution = reduce( 72 * original.height, modified.height ).join('/')","pinned":false,"hidden":false,"mode":"ojs"},{"id":35,"value":"xResolution = reduce( 72 * original.width, modified.width ).join('/')","pinned":false,"hidden":false,"mode":"ojs"},{"id":168,"value":"html``","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W32","stdlib":"1","titling":"auto"}