add type declaration files

package.json

@@ -8,6 +8,7 @@
     "url": "http://joshondesign.com/"
   },
   "type": "module",
+  "types": "./types/index.d.ts",
   "module": "./src/index.js",
   "main": "./dist/pureimage-umd.cjs",
   "browser": "./src/browser.js",
@@ -44,4 +45,4 @@
     "node": ">=0.8"
   },
   "license": "MIT"
-}
+}

types/bitmap.d.ts

@@ -0,0 +1,109 @@
+import { Context } from './context.js';
+
+/**
+ * The Bitmap class is used for direct pixel manipulation(for example setting a pixel colour,
+ * transparency etc). It also provides a factory method for creating new instances of
+ * {@link Context}
+ *
+ * @class Bitmap
+ */
+export class Bitmap {
+    width: number;
+    height: number;
+    data: ArrayBuffer;
+
+    /**
+     * Creates an instance of Bitmap.
+     * @param {number} w      Width
+     * @param {number} h      Height
+     * @param {any}   options Currently unused
+     * @memberof Bitmap
+     */
+    constructor(w: number, h: number, options: any);
+    /**
+     * Calculate Index
+     *
+     * @param {number} x X position
+     * @param {number} y Y position
+     *
+     * @returns {number}
+     *
+     * @memberof Bitmap
+     */
+    calculateIndex(x: number, y: number): number;
+
+    /**
+     * Set the RGBA(Red, Green, Blue, Alpha) values on an individual pixel level
+     *
+     * @param {number} x    X axis position
+     * @param {number} y    Y axis position
+     * @param {number} rgba A hex representation of the RGBA value of the pixel. See {@link NAMED_COLORS} for examples
+     *
+     * @returns {void}
+     *
+     * @memberof Bitmap
+     */
+    setPixelRGBA(x: number, y: number, rgba: number): void;
+
+    /**
+     * Set the individual red, green, blue and alpha levels of an individual pixel
+     *
+     * @param {number} x X axis position
+     * @param {number} y Y axis position
+     * @param {number} r Red level
+     * @param {number} g Green level
+     * @param {number} b Blue level
+     * @param {number} a Alpha level
+     *
+     * @returns {void}
+     *
+     * @memberof Bitmap
+     */
+    setPixelRGBA_i(
+        x: number,
+        y: number,
+        r: number,
+        g: number,
+        b: number,
+        a: number
+    ): void;
+
+    /**
+     * Get the RGBA value of an individual pixel as a hexadecimal number(See {@link NAMED_COLORS} for examples)
+     *
+     * @param {number} x X axis potiion
+     * @param {number} y Y axis position
+     *
+     * @returns {number}
+     *
+     * @memberof Bitmap
+     */
+    getPixelRGBA(x: number, y: number): number;
+
+    /**
+     * Get Pixel RGBA Seperate
+     *
+     * @param {number} x X axis position
+     * @param {number} y Y axis position
+     *
+     * @ignore
+     *
+     * @returns {ArrayBuffer}
+     *
+     * @memberof Bitmap
+     */
+    getPixelRGBA_separate(x: number, y: number): ArrayBuffer;
+
+    /**
+     * {@link Context} factory. Creates a new {@link Context} instance object for the current bitmap object
+     *
+     * @returns {Context}
+     *
+     * @memberof Bitmap
+     */
+    getContext(): Context;
+
+    private _copySubBitmap(x: number, y: number, w: number, h: number): Bitmap;
+
+    private _pasteSubBitmap(src: Bitmap, x: number, y: number): void;
+}

types/browser.d.ts

@@ -0,0 +1 @@
+export function make(width: number, height: number): HTMLCanvasElement;