text: import { inflate } from 'pako';
  import Lerc from 'lerc';
  import BaseDecoder from './basedecoder';
  import { LercParameters, LercAddCompression } from '../globals';
  
  export default class LercDecoder extends BaseDecoder {
    constructor(fileDirectory) {
      super();
  
      this.planarConfiguration = typeof fileDirectory.PlanarConfiguration !== 'undefined' ? fileDirectory.PlanarConfiguration : 1;
      this.samplesPerPixel = typeof fileDirectory.SamplesPerPixel !== 'undefined' ? fileDirectory.SamplesPerPixel : 1;
  
      this.addCompression = fileDirectory.LercParameters[LercParameters.AddCompression];
    }
  
    decodeBlock(buffer) {
      switch (this.addCompression) {
        case LercAddCompression.None:
          break;
        case LercAddCompression.Deflate:
          buffer = inflate(new Uint8Array(buffer)).buffer; // eslint-disable-line no-param-reassign, prefer-destructuring
          break;
        default:
          throw new Error(`Unsupported LERC additional compression method identifier: ${this.addCompression}`);
      }
  
      const lercResult = Lerc.decode(buffer, { returnPixelInterleavedDims: this.planarConfiguration === 1 });
      const lercData = lercResult.pixels[0];
      return lercData.buffer;
    }
  }
  