XParseGeometry, XWMGeometry − parse window geometry

int XParseGeometry(_Xconst char *parsestring, int *x_return,
int *y_return, unsigned int *width_return, unsigned int
*height_return); int XWMGeometry(Display *display, int
screen, _Xconst char *user_geom, _Xconst char *def_geom,
unsigned int bwidth, XSizeHints *hints, int *x_return, int
*y_return, int *width_return, int *height_return, int

          Specify the geometry specifications.

display   Specifies the connection to the X server.

fwidth    Specify the font height and width in pixels
          (increment size).

          Specifies the string you want to parse.

screen    Specifies the screen.

          Return the width and height determined.

yadder    Specify additional interior padding needed in the

y_return  Return the x and y offsets.

bwidth    Specifies the border width.

hints     Specifies the size hints for the window in its
          normal state.

def_geom  Specifies the application’s default geometry or

          Returns the window gravity.

user_geom Specifies the user‐specified geometry or NULL.


By convention, X applications use a standard string to
indicate window size and placement.  XParseGeometry makes it
easier to conform to this standard because it allows you to
parse the standard window geometry.  Specifically, this
function lets you parse strings of the form:


The fields map into the arguments associated with this
function.  (Items enclosed in <> are integers, items in []
are optional, and items enclosed in {} indicate choose one
of.  Note that the brackets should not appear in the actual
string.)  If the string is not in the Host Portable
Character Encoding, the result is implementation‐dependent.

The XParseGeometry function returns a bitmask that indicates
which of the four values (width, height, xoffset, and
yoffset) were actually found in the string and whether the x
and y values are negative.  By convention, −0 is not equal
to +0, because the user needs to be able to say position the
window relative to the right or bottom edge.  For each value
found, the corresponding argument is updated.  For each
value not found, the argument is left unchanged.  The bits
are represented by or YNegative and are defined in They will
be set whenever one of the values is defined or one of the
signs is set.

If the function returns either the XValue or YValue flag,
you should place the window at the requested position.

The XWMGeometry function combines any geometry information
(given in the format used by specified by the user and by
the calling program with size hints (usually the ones to be
stored in WM_NORMAL_HINTS) and returns the position, size,
and gravity or that describe the window.  If the base size
is not set in the XSizeHints structure, the minimum size is
used if set.  Otherwise, a base size of zero is assumed.  If
no minimum size is set in the hints structure, the base size
is used.  A mask (in the form returned by that describes
which values came from the user specification and whether or
not the position coordinates are relative to the right and
bottom edges is returned.  Note that these coordinates will
have already been accounted for in the x_return and y_return

Note that invalid geometry specifications can cause a width
or height of zero to be returned.  The caller may pass the
address of the hints win_gravity field as gravity_return to
update the hints directly.

Xlib − C Language X Interface