/
gps-dnd.html
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gps-dnd.html
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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width,minimum-scale=1.0,initial-scale=1,user-scalable=yes"/>
<title>GPS Benchmark</title>
<style>
html, body {
padding: 0;
margin: 0;
height: 100%;
}
body {
font-family: monospace;
box-sizing: border-box;
display: flex;
flex-direction: column;
font-size: 16px;
}
.red {
color: #cc0000;
}
.green {
color: #59b101;
}
#log {
padding: 10px;
white-space: pre;
}
#map {
flex: 1;
}
input[type="file"] {
opacity: 0;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<input type="file" multiple>
<div id="log">Drop files here<br>or click to open file picker</div>
<div id="map"></div>
<script src="https://maps.googleapis.com/maps/api/js"></script>
<script type="module">
import exifr from '../src/bundles/full.mjs'
import {gpsOnlyOptions, Exifr} from '../src/bundles/full.mjs'
let $log = document.querySelector('#log')
let memUsed = 0
let dropzone = document.body
dropzone.addEventListener('dragenter', e => e.preventDefault())
dropzone.addEventListener('dragover', e => e.preventDefault())
dropzone.addEventListener('drop', e => {
e.preventDefault()
handleFiles(e.dataTransfer.files)
})
document.querySelector('input[type="file"]').addEventListener('change', e => {
e.preventDefault()
handleFiles(e.target.files)
})
async function handleFiles(files) {
files = Array.from(files)
let totalBytes = sum(files.map(f => f.size))
let [time, memory] = await parseAndMeasureImages(files)
$log.innerHTML = [
`files: <strong>${files.length}</strong> = <strong class="red">${(totalBytes / 1024 / 1024).toFixed(1)} MB</strong>`,
`RAM used: <strong class="green">${(memory / 1024 / 1024).toFixed(1)} MB</strong>`,
`parsed in: <strong class="green">${Math.floor(time)} ms</strong> (${(time / files.length).toFixed(1)} ms per file)`,
].join('\n')
}
async function parseAndMeasureImages(files) {
memUsed = 0
let m1 = performance.memory.usedJSHeapSize
let t1 = performance.now()
let promises = files.map(exifr.gps).map(promise => promise.catch(() => {}))
let coords = await Promise.all(promises)
let m2 = performance.memory.usedJSHeapSize
let t2 = performance.now()
renderMap(coords)
return [t2 - t1, m2 - m1]
}
function sum(arr) {
let num = 0
for (let item of arr) num += item
return num
}
function renderMap(coords) {
let map = new google.maps.Map(document.querySelector('#map'), {
navigationControlOptions: {style: google.maps.NavigationControlStyle.SMALL},
mapTypeControl: false,
mapTypeId: google.maps.MapTypeId.ROADMAP
})
coords = coords.filter(coord => coord)
let points = coords.map(coord => new google.maps.LatLng(coord.latitude, coord.longitude))
var bounds = new google.maps.LatLngBounds()
points.forEach(point => bounds.extend(point))
map.fitBounds(bounds)
let markers = points.map(point => new google.maps.Marker({map, position: point}))
}
</script>
</body>
</html>