duckengine/src/utils/convertURItoBlob.ts

A 2D Game Engine for the web.

export default function convertURItoBlob(dataURI: string) {
	// convert base64 to raw binary data held in a string
	const byteString = window.atob(dataURI.split(',')[1]);

	// separate out the mime component
	const mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];

	// write the bytes of the string to an ArrayBuffer
	const arrayBuffer = new ArrayBuffer(byteString.length);
	const _ia = new Uint8Array(arrayBuffer);
	for (let i = 0; i < byteString.length; i++) {
		_ia[i] = byteString.charCodeAt(i);
	}

	const dataView = new DataView(arrayBuffer);
	const blob = new Blob([dataView], { type: mimeString });
	return blob;
}