JPEGOPTIONS

This structure contains fields used for setting JPEG-specific options through the JPEG I/O procedure. This structure is passed to the I/O procedure by setting the the pExtraInfoStruct field of MMIOINFO to the address of JPEGOPTIONS before passing the MMIOINFO structure to mmioOpen. All unused fields must be set to zero.

typedef struct _JPEGOPTIONS {
  ULONG      ulStructLen;        /*  Size of this structure. */
  USHORT     usQuantization[4];  /*  Quantization value. */
  USHORT     usScale;            /*  Scaling value. */
  ULONG      ulColorOrder;       /*  Color order. */
  USHORT     usColorSpaceOut;    /*  Subsampling value. */
} JPEGOPTIONS;

typedef   JPEGOPTIONS   * PJPEGOPTIONS ;