GrayPictureFormatsEnum

typedef enum {
 GPF_Jpeg = 0x00000001,
 GPF_Zip  = 0x00000002,
 GPF_LZW  = 0x00000004,
 GPF_J2K  = 0x00000008,
 GPF_Png  = 0x00000010,
 GPF_Auto = 0x00000020
} GrayPictureFormatsEnum;