XmbTextExtents(3X11)XmbTextExtents(3X11)NAME
XmbTextExtents, XwcTextExtents - compute text extents
SYNOPSIS
int XmbTextExtents(font_set, string, num_bytes, overall_ink_return,
overall_logical_return)
XFontSet font_set;
char *string;
int num_bytes;
XRectangle *overall_ink_return;
XRectangle *overall_logical_return;
int XwcTextExtents(font_set, string, num_wchars, overall_ink_return,
overall_logical_return)
XFontSet font_set;
wchar_t *string;
int num_wchars;
XRectangle *overall_ink_return;
XRectangle *overall_logical_return;
ARGUMENTS
Specifies the font set. Specifies the number of bytes in the string
argument. Specifies the number of characters in the string argument.
Returns the overall ink dimensions. Returns the overall logical dimen‐
sions. Specifies the character string.
DESCRIPTION
The XmbTextExtents and XwcTextExtents functions set the components of
the specified overall_ink_return and overall_logical_return arguments
to the overall bounding box of the string's image and a logical bound‐
ing box for spacing purposes, respectively. They return the value
returned by XmbTextEscapement or XwcTextEscapement. These metrics are
relative to the drawing origin of the string, using the fonts loaded
for the specified font set.
If the overall_ink_return argument is non-NULL, it is set to the bound‐
ing box of the string's character ink. The overall_ink_return for a
nondescending, horizontally drawn Latin character is conventionally
entirely above the baseline; that is, overall_ink_return.height <=
-overall_ink_return.y. The overall_ink_return for a nonkerned character
is entirely at, and to the right of, the origin; that is, over‐
all_ink_return.x >= 0. A character consisting of a single pixel at the
origin would set overall_ink_return fields y = 0, x = 0, width = 1, and
height = 1.
If the overall_logical_return argument is non-NULL, it is set to the
bounding box that provides minimum spacing to other graphical features
for the string. Other graphical features, for example, a border sur‐
rounding the text, should not intersect this rectangle.
When the XFontSet has missing charsets, metrics for each unavailable
character are taken from the default string returned by XCreateFontSet
so that the metrics represent the text as it will actually be drawn.
The behavior for an invalid codepoint is undefined.
SEE ALSOXmbTextEscapement(3X11), XmbTextPerCharExtents(3X11)
Xlib -- C Language X Interface
XmbTextExtents(3X11)
