hpux man page for xbitmap

XBitmap*()																XBitmap*()

Name
  XBitmapBitOrder, XBitmapPad, XBitmapUnit - query the bitmap format of a display.

Synopsis
  int XBitmapUnit(display)
	   Display *display;
  int XBitmapBitOrder(display)
	   Display *display;
  int XBitmapPad(display)
	   Display *display;

Arguments
  display   Specifies a connection to an X Server; returned from XOpenDisplay().

Returns
  XBitmapUnit() and XBitmapPad() return a number of bits.  XBitmapBitOrder() returns LSBFirst or MSBFirst.

Description
  These functions are used in connection with manipulating image data.

  XBitmapUnit() returns the size of a bitmap's scanline unit in bits.  The scanline is calculated in multiples of this value.

  Within each bitmap unit, the left-most bit in the bitmap as displayed on the screen is either the least-significant or most-significant bit
  in the unit.	XBitmapBitOrder() returns LSBFirst or MSBFirst to indicate the server's bit order.

  Each scanline must be padded to a multiple of bits returned by XBitmapPad().

  The C language macros BitmapUnit(), BitmapBitOrder(), and BitmapPad() are equivalent and slightly more efficient.

See Also
  XImageByteOrder(), XGetImage(), XPutImage().

Xlib - Macro Equivalents														XBitmap*()