lity)
        let compress = Module.cwrap('compress', 'number', ['number']);
        // Canvas
        let displayZone = {
          ctx: undefined,       // canvas context
          bmpArray: undefined,  // bitmap data
          imageData: undefined  // internal canvas bitmap data
        };
        // The following object maps the C Image structure
        let image = {
          width: undefined,
          height: undefined,
          compressedSize: undefined,
          data: undefined
        }

      