return imng_p->image+CHANNELS*imng_p->width*iLinenr;
return imng_p->image+imng_p->channels*imng_p->width*iLinenr;
il_mng_getcanvasline(mng_handle handle, mng_uint32 iLinenr){  EXTRACT_STRUCTS;  return imng_p->image+CHANNELS*imng_p->width*iLinenr;}