ImageByteOrder(3X)                             ImageByteOrder(3X)



NAME
     ImageByteOrder, BitmapBitOrder, BitmapPad, BitmapUnit,
     DisplayHeight, DisplayHeightMM, DisplayWidth,
     DisplayWidthMM,  XListPixmapFormats,  XPixmapFormatValues  -
     return image values

SYNOPSIS
     XPixmapFormatValues *XListPixmapFormats(display, count-
     return)
     Display *display;
     int *count-return;

     ImageByteOrder(display)

     BitmapBitOrder(display)

     BitmapPad(display)

     BitmapUnit(display)

     DisplayHeight(display, screen-number)

     DisplayHeightMM(display, screen-number)

     DisplayWidth(display, screen-number)

     DisplayWidthMM(display, screen-number)

DESCRIPTION
     The XListPixmapFormats function returns an array of XPixmap-
     FormatValues structures that describe the types of Z format
     images that are supported by the specified display.  If in-
     sufficient memory is available, XListPixmapFormats returns
     NULL.  To free the allocated storage for the
     XPixmapFormatValues structures, use XFree.

     The ImageByteOrder macro specifies the required byte order
     for images for each scanline unit in XY format (bitmap) or
     for each pixel value in Z format.

     The BitmapBitOrder macro returns LSBFirst or MSBFirst to in-
     dicate whether the leftmost bit in the bitmap as displayed
     on the screen is the least or most significant bit in the
     unit.

     The BitmapPad macro returns the number of bits that each
     scanline must be padded.

     The BitmapUnit macro returns the size of a bitmap's scanline
     unit in bits.





November, 1990                                                  1

ImageByteOrder(3X)                             ImageByteOrder(3X)



     The DisplayHeight macro returns the height of the specified
     screen in pixels.

     The DisplayHeightMM macro returns the height of the speci-
     fied screen in millimeters.

     The DisplayWidth macro returns the width of the screen in
     pixels.

     The DisplayWidthMM macro returns the width of the specified
     screen in millimeters.

   Arguments
     These functions and macros accept the following arguments:

     display Specifies the connection to the X server.

     count-return
             Returns the number of pixel map formats that are
             supported by the display.

     screen-number
             Specifies the appropriate screen number on the host
             server.

   Structures
     The XPixmapFormatValues structure provides an interface to
     the pixel map format information that is returned at the
     time of a connection setup.  The structure is defined as
     follows.

     typedef struct {
       int depth;
       int bits_per_pixel;
       int scanline_pad;
     } XPixmapFormatValues;

SEE ALSO
     AllPlanes(3X), BlackPixelOfScreen(3X), IsCursorKey(3X),
     XFree(3X)

     Xlib - C Language Interface














2                                                  November, 1990