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

displaySpecifies 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 Reference Manual