mirror of https://github.com/espruino/BangleApps
275 lines
11 KiB
HTML
275 lines
11 KiB
HTML
<html>
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<head>
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<link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.3/dist/leaflet.css" />
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<link rel="stylesheet" href="../../css/spectre.min.css">
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<link rel="stylesheet" href="https://unpkg.com/leaflet-geosearch@3.6.0/dist/geosearch.css"/>
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</head>
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<style>
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body {
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padding: 0;
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margin: 0;
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}
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html, body, #map {
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height: 100%;
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width: 100%;
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}
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#map { z-index: 1; }
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#controls {
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padding: 10px;
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margin: 10px;
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border: 1px solid black;
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position:absolute;
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right:0px;top:0px;
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background-color: rgb(255, 255, 255);
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z-index: 100;
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}
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#maptiles {
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width: 256px;
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height: 256px;
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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="map">
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</div>
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<div id="controls">
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<div style="display:inline-block;text-align:center;vertical-align: top;" id="3bitdiv"> <input type="checkbox" id="3bit"></input><br/><span>3 bit</span></div>
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<button id="getmap" class="btn btn-primary">Get Map</button><br/>
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<canvas id="maptiles" style="display:none"></canvas>
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<div id="uploadbuttons" style="display:none"><button id="upload" class="btn btn-primary">Upload</button>
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<button id="cancel" class="btn">Cancel</button></div>
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</div>
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<script src="../../core/lib/customize.js"></script>
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<script src="https://unpkg.com/leaflet@1.0.3/dist/leaflet.js"></script>
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<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
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<script src="../../core/lib/heatshrink.js"></script>
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<script src="../../core/lib/imageconverter.js"></script>
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<script src="https://unpkg.com/leaflet-geosearch@3.6.0/dist/bundle.min.js"></script>
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<script>
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/*
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TODO:
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* Could maybe use palettised output?
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* Could potentially use a custom 16 color palette?
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* Allow user to choose size of map area to be uploaded (small/med/large)
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* What is faster? Storing as a compressed image and decompressing, or storing decompressed?
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*/
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var TILESIZE = 96; // Size of our tiles
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var OSMTILESIZE = 256; // Size of openstreetmap tiles
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var MAPSIZE = TILESIZE*5; ///< 480 - Size of map we download
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var OSMTILECOUNT = 3; // how many tiles do we download in each direction (Math.floor(MAPSIZE / OSMTILESIZE)+1)
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/* Can see possible tiles on http://leaflet-extras.github.io/leaflet-providers/preview/
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However some don't allow cross-origin use */
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//var TILELAYER = 'https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png'; // simple, high contrast, TOO SLOW
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//var TILELAYER = 'http://a.tile.stamen.com/toner/{z}/{x}/{y}.png'; // black and white
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var TILELAYER = 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
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var PREVIEWTILELAYER = 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
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// Create map and try and set the location to where the browser thinks we are
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var map = L.map('map').locate({setView: true, maxZoom: 16, enableHighAccuracy:true});
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// Tiles used for Bangle.js itself
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var bangleTileLayer = L.tileLayer(TILELAYER, {
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maxZoom: 18,
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attribution: 'Map data © <a href="https://openstreetmap.org/copyright">OpenStreetMap</a> contributors</a>'
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});
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// Tiles used for the may the user sees (faster)
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var previewTileLayer = L.tileLayer(PREVIEWTILELAYER, {
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maxZoom: 18,
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attribution: 'Map data © <a href="https://openstreetmap.org/copyright">OpenStreetMap</a> contributors</a>'
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});
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// Could optionally overlay trails: https://wiki.openstreetmap.org/wiki/Tiles
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// Search box:
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const searchProvider = new window.GeoSearch.OpenStreetMapProvider();
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const searchControl = new GeoSearch.GeoSearchControl({
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provider: searchProvider,
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style: 'button',
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updateMap: true,
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autoClose: true,
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showMarker: false,
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keepResult: true,
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autoComplete: false
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});
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map.addControl(searchControl);
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function onInit(device) {
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if (device && device.info && device.info.g) {
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// On 3 bit devices, don't even offer the option. 3 bit is the only way
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if (device.info.g.bpp==3) {
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document.getElementById("3bit").checked = true;
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document.getElementById("3bitdiv").style = "display:none";
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}
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}
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}
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var mapFiles = [];
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previewTileLayer.addTo(map);
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function tilesLoaded(ctx, width, height) {
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var options = {
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compression:false, output:"raw",
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mode:"web"
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};
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if (document.getElementById("3bit").checked) {
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options = {
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compression:false, output:"raw",
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mode:"3bit",
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};
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/* If in 3 bit mode, go through all the data beforehand and
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turn the saturation up to maximum, so when thresholded it
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works a lot better */
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var imageData = ctx.getImageData(0,0,width,height);
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var rgba = imageData.data;
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var l = width*height*4;
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for (var i=0;i<l;i+=4) {
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var min = Math.min(rgba[i+0],rgba[i+1],rgba[i+2]);
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var max = Math.max(rgba[i+0],rgba[i+1],rgba[i+2]);
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var d = max-min;
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if (max<120 || (d<8 && max<215)) { // black, or a darker grey
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rgba[i+0]=0;
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rgba[i+1]=0;
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rgba[i+2]=0;
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} else if (min>240 || d<8) { // white or grey
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rgba[i+0]=255;
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rgba[i+1]=255;
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rgba[i+2]=255;
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} else { // another colour - use max saturation
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rgba[i+0] = (rgba[i+0]-min) * 255 / d;
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rgba[i+1] = (rgba[i+1]-min) * 255 / d;
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rgba[i+2] = (rgba[i+2]-min) * 255 / d;
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}
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}
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ctx.putImageData(imageData,0,0);
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}
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console.log("Compression options", options);
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var w = Math.round(width / TILESIZE);
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var h = Math.round(height / TILESIZE);
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var tiledImage;
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for (var y=0;y<h;y++) {
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for (var x=0;x<w;x++) {
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var imageData = ctx.getImageData(x*TILESIZE, y*TILESIZE, TILESIZE, TILESIZE);
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var rgba = imageData.data;
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options.rgbaOut = rgba;
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options.width = TILESIZE;
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options.height = TILESIZE;
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var imgstr = imageconverter.RGBAtoString(rgba, options);
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ctx.putImageData(imageData,x*TILESIZE, y*TILESIZE); // write preview
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/*var compress = 'require("heatshrink").decompress('
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if (!imgstr.startsWith(compress)) throw "Data in wrong format";
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imgstr = imgstr.slice(compress.length,-1);*/
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if (tiledImage) tiledImage += imgstr.substr(3); // skip header
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else tiledImage = imgstr; // for first image, keep the header
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}
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}
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return [{
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name:"openstmap.0.img",
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content:tiledImage
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}];
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}
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document.getElementById("getmap").addEventListener("click", function() {
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var zoom = map.getZoom();
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var centerlatlon = map.getBounds().getCenter();
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var center = map.project(centerlatlon, zoom).divideBy(OSMTILESIZE);
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// Reason for 16px adjustment below not 100% known, but it seems to
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// align everything perfectly: https://github.com/espruino/BangleApps/issues/984
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var ox = Math.round((center.x - Math.floor(center.x)) * OSMTILESIZE) + 16;
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var oy = Math.round((center.y - Math.floor(center.y)) * OSMTILESIZE) + 16;
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center = center.floor(); // make sure we're in the middle of a tile
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// JS version of Bangle.js's projection
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function bproject(lat, lon) {
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const degToRad = Math.PI / 180; // degree to radian conversion
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const latMax = 85.0511287798; // clip latitude to sane values
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const R = 6378137; // earth radius in m
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if (lat > latMax) lat=latMax;
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if (lat < -latMax) lat=-latMax;
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var s = Math.sin(lat * degToRad);
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return new L.Point(
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(R * lon * degToRad),
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(R * Math.log((1 + s) / (1 - s)) / 2)
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);
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}
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// Work out scale factors (how much from Bangle.project does one pixel equate to?)
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var pc = map.unproject(center.multiplyBy(OSMTILESIZE), zoom);
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var pd = map.unproject(center.multiplyBy(OSMTILESIZE).add({x:1,y:0}), zoom);
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var bc = bproject(pc.lat, pc.lng)
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var bd = bproject(pd.lat, pd.lng)
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var scale = bc.distanceTo(bd);
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// test
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/*var p = bproject(centerlatlon.lat, centerlatlon.lng);
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var q = bproject(mylat, mylon);
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var testPt = {
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x : (q.x-p.x)/scale + (MAPSIZE/2),
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y : (MAPSIZE/2) - (q.y-p.y)/scale
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};*/
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var tileGetters = [];
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// Render everything to a canvas...
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var canvas = document.getElementById("maptiles");
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canvas.style.display="";
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var ctx = canvas.getContext('2d');
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canvas.width = MAPSIZE;
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canvas.height = MAPSIZE;
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for (var i = 0; i < OSMTILECOUNT; i++) {
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for (var j = 0; j < OSMTILECOUNT; j++) {
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(function(i,j){
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var coords = new L.Point(center.x+i-1, center.y+j-1);
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coords.z = zoom;
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var img = new Image();
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img.crossOrigin = "Anonymous";
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tileGetters.push(new Promise(function(resolve,reject) {
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img.onload = function(){
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ctx.drawImage(img,i*OSMTILESIZE - ox, j*OSMTILESIZE - oy);
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/*if (testPt) {
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ctx.fillStyle="green";
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ctx.fillRect(testPt.x-1, testPt.y-5, 3,10);
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ctx.fillRect(testPt.x-5, testPt.y-1, 10,3);
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}*/
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resolve();
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};
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}));
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bangleTileLayer._tileZoom = previewTileLayer._tileZoom;
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img.src = bangleTileLayer.getTileUrl(coords);
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})(i,j);
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}
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}
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Promise.all(tileGetters).then(() => {
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document.getElementById("uploadbuttons").style.display="";
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mapFiles = tilesLoaded(ctx, canvas.width, canvas.height);
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mapFiles.unshift({name:"openstmap.0.json",content:JSON.stringify({
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imgx : canvas.width,
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imgy : canvas.height,
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tilesize : TILESIZE,
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scale : scale, // how much of Bangle.project(latlon) does one pixel equate to?
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lat : centerlatlon.lat,
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lon : centerlatlon.lng,
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w : Math.round(canvas.width / TILESIZE), // width in tiles
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h : Math.round(canvas.height / TILESIZE), // height in tiles
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fn : "openstmap.0.img"
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})});
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console.log(mapFiles);
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});
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});
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document.getElementById("upload").addEventListener("click", function() {
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sendCustomizedApp({
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storage:mapFiles
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});
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});
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document.getElementById("cancel").addEventListener("click", function() {
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document.getElementById("maptiles").style.display="none";
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document.getElementById("uploadbuttons").style.display="none";
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});
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</script>
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</body>
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</html>
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