Expo Image Decoder Module

A native Expo module for decoding images to raw pixel data. This module provides efficient image decoding capabilities for React Native applications.

Installation

npm install expo-image-decoder

API

decodeImageFromUri(uri: string): Promise<DecodedImage>

Decodes an image directly from a URI into raw RGBA pixel data.

Parameters:

• uri (string): The URI of the image to decode (can be a file:// URI or https:// URL)

Returns:

• Promise<DecodedImage>: A promise that resolves to an object containing:
  • data (Uint8ClampedArray): Raw pixel data in RGBA format (4 bytes per pixel)
  • width (number): The width of the image in pixels
  • height (number): The height of the image in pixels

Example:

import { decodeImageFromUri } from "expo-image-decoder";

const result = await decodeImageFromUri("file:///path/to/image.jpg");
console.log(result.width, result.height, result.data);