react-native-qrcode-package/src/component/generate_qr_code/TransformMatrixIntoPath.js

This package include QR code generator and QR code Scanner for React Native.

export default (matrix, size) => {
  const cellSize = size / matrix.length;
  let path = '';
  matrix.forEach((row, i) => {
    let needDraw = false;
    row.forEach((column, j) => {
      if (column) {
        if (!needDraw) {
          path += `M${cellSize * j} ${cellSize / 2 + cellSize * i} `;
          needDraw = true;
        }
        if (needDraw && j === matrix.length - 1) {
          path += `L${cellSize * (j + 1)} ${cellSize / 2 + cellSize * i} `;
        }
      } else {
        if (needDraw) {
          path += `L${cellSize * j} ${cellSize / 2 + cellSize * i} `;
          needDraw = false;
        }
      }
    });
  });
  return {
    cellSize,
    path,
  };
};