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openlayers: add copy of code for script includes; migrate examples [#3]

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This commit is contained in:
Brandon Liu
2023-05-10 20:20:37 +08:00
parent 7ec4ecbcdb
commit 089a732c54
9 changed files with 583 additions and 175 deletions
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1
openlayers/.gitignore vendored Normal file
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@@ -0,0 +1 @@
dist

39
openlayers/examples/raster.html Normal file
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<html>
<head>
<title>PMTiles OpenLayers Raster Example</title>
<meta charset="utf-8"/>
<script src="https://cdn.jsdelivr.net/npm/ol@v7.3.0/dist/ol.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@v7.3.0/ol.css">
<script src="https://unpkg.com/ol-pmtiles@0.1.0/dist/olpmtiles.js"></script>
<style>
body, #map {
height:100vh;
margin: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script type="text/javascript">
const rasterLayer = new ol.layer.WebGLTile({
source: new olpmtiles.PMTilesRasterSource({
url:"https://r2-public.protomaps.com/protomaps-sample-datasets/terrarium_z9.pmtiles",
attributions:["https://github.com/tilezen/joerd/blob/master/docs/attribution.md"],
tileSize: [512,512]
})
});
ol.proj.useGeographic();
const map = new ol.Map({
layers: [rasterLayer],
target: 'map',
view: new ol.View({
center: [0,0],
zoom: 1,
multiWorld: true
}),
});
</script>
</body>
</html>

46
openlayers/examples/vector.html Normal file
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@@ -0,0 +1,46 @@
<html>
<head>
<title>PMTiles OpenLayers Vector Example</title>
<meta charset="utf-8"/>
<script src="https://cdn.jsdelivr.net/npm/ol@v7.3.0/dist/ol.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@v7.3.0/ol.css">
<script src="https://unpkg.com/ol-pmtiles@0.1.0/dist/olpmtiles.js"></script>
<style>
body, #map {
height:100vh;
margin: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script type="text/javascript">
const vectorLayer = new ol.layer.VectorTile({
declutter: true,
source: new olpmtiles.PMTilesVectorSource({
url: "https://r2-public.protomaps.com/protomaps-sample-datasets/nz-buildings-v3.pmtiles",
attributions: ["© Land Information New Zealand"]
}),
style: new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'gray',
width: 1,
}),
fill: new ol.style.Fill({
color: 'rgba(20,20,20,0.9)',
})
})
});
ol.proj.useGeographic();
const map = new ol.Map({
layers: [vectorLayer],
target: 'map',
view: new ol.View({
center: [172.606201,-43.556510],
zoom: 7
}),
});
</script>
</body>
</html>

397
openlayers/package-lock.json generated
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@@ -1,21 +1,55 @@
{
"name": "ol-pmtiles",
"version": "0.0.3",
"version": "0.1.0",
"lockfileVersion": 3,
"requires": true,
"packages": {
"": {
"name": "ol-pmtiles",
"version": "0.0.3",
"version": "0.1.0",
"license": "BSD-3-Clause",
"dependencies": {
"pmtiles": "^2.7.0"
},
"devDependencies": {},
"devDependencies": {
"esbuild": "^0.15.11"
},
"peerDependencies": {
"ol": ">=7.3.0"
}
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"cpu": [
"arm"
],
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"optional": true,
"os": [
"android"
],
"engines": {
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}
},
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@@ -77,6 +111,363 @@
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"hasInstallScript": true,
"bin": {
"esbuild": "bin/esbuild"
},
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"optionalDependencies": {
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5
openlayers/package.json
View File

@@ -1,10 +1,11 @@
{
"name": "ol-pmtiles",
"version": "0.0.3",
"version": "0.1.0",
"description": "PMTiles sources for OpenLayers",
"type": "module",
"main": "src/index.js",
"files": [
"dist/olpmtiles.js",
"src/index.js"
],
"repository": {
@@ -20,6 +21,7 @@
],
"license": "BSD-3-Clause",
"scripts": {
"build-iife": "esbuild src/script_includes.js --outfile=dist/olpmtiles.js --target=es6 --global-name=olpmtiles --bundle --format=iife",
"prettier": "prettier --write *.js",
"prettier-check": "prettier --check *.js"
},
@@ -27,6 +29,7 @@
"pmtiles": "^2.7.0"
},
"devDependencies": {
"esbuild": "^0.15.11"
},
"peerDependencies": {
"ol": ">=7.3.0"

98
openlayers/src/script_includes.js Normal file
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@@ -0,0 +1,98 @@
// IMPORTANT: this file is manually edited!
// copy any changes made from src/index.js to here
// import DataTile from "ol/source/DataTile";
// import VectorTile from "ol/source/VectorTile";
// import TileState from "ol/TileState";
// import { MVT } from "ol/format";
import * as pmtiles from "pmtiles";
export class PMTilesRasterSource extends ol.source.DataTile {
loadImage = (src) => {
return new Promise((resolve, reject) => {
const img = new Image();
img.addEventListener("load", () => resolve(img));
img.addEventListener("error", () => reject(new Error("load failed")));
img.src = src;
});
};
constructor(options) {
super({
...options,
...{
state: "loading",
},
});
const p = new pmtiles.PMTiles(options.url);
p.getHeader().then((h) => {
this.tileGrid.minZoom = h.minZoom;
this.tileGrid.maxZoom = h.maxZoom;
this.setLoader(async (z, x, y) => {
const response = await p.getZxy(z, x, y);
const src = URL.createObjectURL(new Blob([response.data]));
const image = await this.loadImage(src);
URL.revokeObjectURL(src);
return image;
});
this.setState("ready");
});
}
}
export class PMTilesVectorSource extends ol.source.VectorTile {
tileLoadFunction = (tile, url) => {
// the URL construction is done internally by OL, so we need to parse it
// back out here using a hacky regex
const re = new RegExp(/pmtiles:\/\/(.+)\/(\d+)\/(\d+)\/(\d+)/);
const result = url.match(re);
const z = +result[2];
const x = +result[3];
const y = +result[4];
tile.setLoader((extent, resolution, projection) => {
tile.setState(1);
this.pmtiles_
.getZxy(z, x, y)
.then((tile_result) => {
if (tile_result) {
const format = tile.getFormat();
tile.setFeatures(
format.readFeatures(tile_result.data.buffer, {
extent: extent,
featureProjection: projection,
})
);
tile.setState(2);
} else {
tile.setFeatures([]);
tile.setState(4);
}
})
.catch((err) => {
tile.setFeatures([]);
tile.setState(3);
});
});
};
constructor(options) {
super({
...options,
...{
state: "loading",
url: "pmtiles://" + options.url + "/{z}/{x}/{y}",
format: new ol.format.MVT(),
},
});
this.pmtiles_ = new pmtiles.PMTiles(options.url);
this.pmtiles_.getHeader().then((h) => {
this.tileGrid.minZoom = h.minZoom;
this.tileGrid.maxZoom = h.maxZoom;
this.setTileLoadFunction(this.tileLoadFunction);
this.setState("ready");
});
}
}