PF_5R6G5B, /**< 16-bit TrueColor: 5-R, 6-G, 5-B bits */
PF_Dither, /**< Color-mapped RGB with dither */
PF_Lookup, /**< Color-mapped RGB without dither */
PF_HPCR, /**< HP Color Recovery (ad@lms.be 30/08/95) */
PF_1Bit, /**< monochrome dithering of RGB */
PF_Grayscale, /**< Grayscale or StaticGray */
PF_5R6G5B, /**< 16-bit TrueColor: 5-R, 6-G, 5-B bits */
PF_Dither, /**< Color-mapped RGB with dither */
PF_Lookup, /**< Color-mapped RGB without dither */
PF_HPCR, /**< HP Color Recovery (ad@lms.be 30/08/95) */
PF_1Bit, /**< monochrome dithering of RGB */
PF_Grayscale, /**< Grayscale or StaticGray */