added typing

.gitignore

@@ -106,3 +106,4 @@ dist
 *.tif
 *.tiff
 test/data/*.json
+pnpm-lock.yaml

README.md

@@ -9,9 +9,9 @@ npm install geotiff-palette
 # usage
 ## downloaded GeoTIFF
 ```
-const { readFileSync } = require('fs');
-const { fromArrayBuffer } = require('geotiff');
-const { getPalette } = require('geotiff-palette');
+import { readFileSync } from 'fs';
+import { fromArrayBuffer } from 'geotiff';
+import { getPalette } from 'geotiff-palette';
 
 const data = readFileSync('image.tif');
 const arrayBuffer = data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength);

index.d.ts

@@ -0,0 +1 @@
+export function getPalette (image: any, options ?: { debug?: boolean }): Readonly<[number, number, number, number][]>;

index.js

@@ -1,15 +1,7 @@
-const getPalette = (image, { debug = false } = { debug: false }) => {
+function getPalette (image, { debug = false } = { debug: false }) {
     if (debug) console.log("starting getPalette with image", image);
     const { fileDirectory } = image;
-    const {
-        BitsPerSample,
-        ColorMap,
-        ImageLength,
-        ImageWidth,
-        PhotometricInterpretation,
-        SampleFormat,
-        SamplesPerPixel
-    } = fileDirectory;
+    const { BitsPerSample, ColorMap } = fileDirectory;
 
     if (!ColorMap) {
         throw new Error("[geotiff-palette]: the image does not contain a color map, so we can't make a palette.");
@@ -43,4 +35,10 @@ const getPalette = (image, { debug = false } = { debug: false }) => {
     return result;
 }
 
-module.exports = { getPalette };
+if (typeof define === "function" && define.amd) {
+    define(function() { return { getPalette } });
+}
+
+if (typeof module === "object") {
+    module.exports = { getPalette };
+}