All files / src module.ts

96.15% Statements 25/26
83.33% Branches 5/6
100% Functions 5/5
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import { Image } from './Image';
import { ImageScanner } from './ImageScanner';
import { Symbol } from './Symbol';
 
const defaultScannerPromise = ImageScanner.create();
export const getDefaultScanner = async () => {
  return await defaultScannerPromise;
};
 
const scanImage = async (
  image: Image,
  scanner?: ImageScanner
): Promise<Array<Symbol>> => {
  if (scanner === undefined) {
    scanner = await defaultScannerPromise;
  }
  const res = scanner.scan(image);
  Iif (res < 0) {
    throw Error('Scan Failed');
  }
  if (res === 0) return [];
  return image.getSymbols();
};
 
export const scanGrayBuffer = async (
  buffer: ArrayBuffer,
  width: number,
  height: number,
  scanner?: ImageScanner
): Promise<Array<Symbol>> => {
  const image = await Image.createFromGrayBuffer(width, height, buffer);
  const res = await scanImage(image, scanner);
  image.destory();
  return res;
};
 
export const scanRGBABuffer = async (
  buffer: ArrayBuffer,
  width: number,
  height: number,
  scanner?: ImageScanner
): Promise<Array<Symbol>> => {
  const image = await Image.createFromRGBABuffer(width, height, buffer);
  const res = await scanImage(image, scanner);
  image.destory();
  return res;
};
 
export const scanImageData = async (
  image: ImageData,
  scanner?: ImageScanner
): Promise<Array<Symbol>> => {
  return await scanRGBABuffer(
    image.data.buffer,
    image.width,
    image.height,
    scanner
  );
};