RGBOQuantum       174 coders/rgb.c         quantum_type=RGBOQuantum;
RGBOQuantum      1152 coders/rgb.c       quantum_type=RGBOQuantum;
RGBOQuantum      1234 coders/rgb.c             if (quantum_type == RGBOQuantum)
RGBOQuantum      4011 magick/quantum-export.c     case RGBOQuantum:
RGBOQuantum      4157 magick/quantum-import.c     case RGBOQuantum:
RGBOQuantum       319 magick/quantum.c     case RGBOQuantum: packet_size=4; break;