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 *gravity_return);

          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 window.

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 NULL.

          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 values.

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