avifTransformFlag

type avifTransformFlag = (

  AVIF_TRANSFORM_NONE = 0,

  AVIF_TRANSFORM_PASP = 1 shl 0,

  AVIF_TRANSFORM_CLAP = 1 shl 1,

  AVIF_TRANSFORM_IROT = 1 shl 2,

  AVIF_TRANSFORM_IMIR = 1 shl 3

);