term% cat index.txt STRINGSIZE(2) System Calls Manual STRINGSIZE(2)
NAME
stringsize, stringwidth, stringnwidth, runestringsize, runestringwidth,
runestringnwidth - graphical size of strings
SYNOPSIS
#include <u.h>
#include <libc.h>
#include <draw.h>
Point stringsize(Font *f, char *s)
int stringwidth(Font *f, char *s)
int stringnwidth(Font *f, char *s, int n)
Point runestringsize(Font *f, Rune *s)
int runestringwidth(Font *f, Rune *s)
int runestringnwidth(Font *f, Rune *s, int n)
DESCRIPTION
These routines compute the geometrical extent of character strings when
drawn on the display. The most straightforward, stringsize, returns a
Point representing the vector from upper left to lower right of the
NUL-terminated string s drawn in font f. Stringwidth returns just the
x component. Stringnwidth returns the width of the first n characters
of s.
The routines beginning with rune are analogous, but accept an array of
runes rather than UTF-encoded bytes.
FILES
/lib/font/bit directory of fonts
SOURCE
/sys/src/libdraw
SEE ALSO
addpt(2), cachechars(2), subfont(2), draw(2), draw(3), image(6),
font(6)
DIAGNOSTICS
Because strings are loaded dynamically, these routines may generate I/O
to the server and produce calls to the graphics error function.
STRINGSIZE(2)