= image.width * image.height * 4;
          for (let ptr = image.data, iDst = 0; iDst < len; ptr += 3, iDst += 4) {
            displayZone.bmpArray[iDst + 0] = Module.getValue(ptr + 0, 'i8');
            displayZone.bmpArray[iDst + 1] = Module.getValue(ptr + 1, 'i8');
            displayZone.bmpArray[iDst + 2] = Module.getValue(ptr + 2, 'i8');
          }

          // Following is an aborted performance optimization.
          // Problem comes from memory alignment : read RGB to write RGBA
          // im