js decoder 1.1.0

adds fflate dependency; maplibre decoder can read gzipped tiles [#41]

app/src/MaplibreMap.tsx

@@ -93,6 +93,7 @@ function MaplibreMap(props: { file: PMTiles }) {
   useEffect(() => {
     let cache = new ProtocolCache();
     maplibregl.addProtocol("pmtiles", cache.protocol);
+    cache.add(props.file); // this is necessary for non-HTTP sources
 
     map = new maplibregl.Map({
       container: mapContainerRef.current!,

js/index.ts

@@ -1,5 +1,7 @@
 declare const L: any;
 
+import { decompressSync } from "fflate";
+
 export const shift = (n: number, shift: number) => {
   return n * Math.pow(2, shift);
 };
@@ -536,7 +538,11 @@ export class ProtocolCache {
         instance!.source
           .getBytes(val.offset, val.length)
           .then((arr) => {
-            callback(null, new Uint8Array(arr.buffer), null, null);
+            let data = new Uint8Array(arr.buffer);
+            if (data[0] == 0x1f && data[1] == 0x8b) {
+              data = decompressSync(data);
+            }
+            callback(null, data, null, null);
           })
           .catch((e) => {
             callback(new Error("Canceled"), null, null, null);

js/package-lock.json

@@ -1,13 +1,16 @@
 {
   "name": "pmtiles",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "pmtiles",
-      "version": "1.0.0",
+      "version": "1.1.0",
       "license": "BSD-3-Clause",
+      "dependencies": {
+        "fflate": "^0.7.3"
+      },
       "devDependencies": {
         "esbuild": "^0.11.14",
         "esbuild-runner": "^2.2.1",
@@ -47,6 +50,11 @@
         "esbuild": "*"
       }
     },
+    "node_modules/fflate": {
+      "version": "0.7.3",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.7.3.tgz",
+      "integrity": "sha512-0Zz1jOzJWERhyhsimS54VTqOteCNwRtIlh8isdL0AXLo0g7xNTfTL7oWrkmCnPhZGocKIkWHBistBrrpoNH3aw=="
+    },
     "node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -115,6 +123,11 @@
         "tslib": "2.3.1"
       }
     },
+    "fflate": {
+      "version": "0.7.3",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.7.3.tgz",
+      "integrity": "sha512-0Zz1jOzJWERhyhsimS54VTqOteCNwRtIlh8isdL0AXLo0g7xNTfTL7oWrkmCnPhZGocKIkWHBistBrrpoNH3aw=="
+    },
     "source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",

js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "pmtiles",
-  "version": "1.0.4",
+  "version": "1.1.0",
   "description": "PMTiles archive decoder for browsers",
   "main": "dist/index.cjs",
   "module": "dist/index.mjs",
@@ -11,9 +11,9 @@
     "index.ts"
   ],
   "scripts": {
-    "build-iife": "esbuild index.ts --outfile=dist/index.js --target=es6 --global-name=pmtiles --format=iife",
+    "build-iife": "esbuild index.ts --outfile=dist/index.js --target=es6 --global-name=pmtiles --bundle --format=iife",
-    "build-esm": "esbuild index.ts --outfile=dist/index.mjs --target=es6 --global-name=pmtiles --format=esm",
+    "build-esm": "esbuild index.ts --outfile=dist/index.mjs --target=es6 --global-name=pmtiles --bundle --format=esm",
-    "build-cjs": "esbuild index.ts --outfile=dist/index.cjs --target=es6 --global-name=pmtiles --format=cjs",
+    "build-cjs": "esbuild index.ts --outfile=dist/index.cjs --target=es6 --global-name=pmtiles --bundle --format=cjs",
     "build-tsc": "tsc --declaration --emitDeclarationOnly --outdir dist",
     "build": "npm run build-iife && npm run build-esm && npm run build-cjs && npm run build-tsc",
     "test": "node -r esbuild-runner/register index.test.ts",
@@ -28,5 +28,8 @@
     "esbuild-runner": "^2.2.1",
     "typescript": "^4.5.5",
     "zora": "^5.0.2"
+  },
+  "dependencies": {
+    "fflate": "^0.7.3"
   }
 }

python/pmtiles/reader.py

@@ -18,7 +18,6 @@ def MemorySource(buf):
 
     return get_bytes
 
-
 class Reader:
     def __init__(self, get_bytes):
         self.get_bytes = get_bytes