1 .TH STRINGSIZE 3
2 .SH NAME
3 stringsize, stringwidth, stringnwidth, runestringsize, runestringwidth, runestringnwidth \- graphical size of strings
4 .SH SYNOPSIS
5 .nf
6 .PP
7 .ft L
8 #include <u.h>
9 #include <libc.h>
10 #include <draw.h>
11 .ft P
12 .ta \w'\fLPoint 'u
13 .PP
14 .B
15 Point	stringsize(Font *f, char *s)
16 .PP
17 .B
18 int	stringwidth(Font *f, char *s)
19 .PP
20 .B
21 int	stringnwidth(Font *f, char *s, int n)
22 .PP
23 .B
24 Point	runestringsize(Font *f, Rune *s)
25 .PP
26 .B
27 int	runestringwidth(Font *f, Rune *s)
28 .PP
29 .B
30 int	runestringnwidth(Font *f, Rune *s, int n)
31 .SH DESCRIPTION
32 These routines compute the geometrical extent of character strings when drawn on the display.  The most straightforward,
33 .BR stringsize ,
34 returns a
35 .B Point
36 representing the vector from upper left to lower right of the NUL-terminated string
37 .I s
38 drawn in font
39 .IR f .
40 .B Stringwidth
41 returns just the
42 .I x
43 component.
44 .B Stringnwidth
45 returns the width of the first
46 .I n
47 characters of
48 .IR s .
49 .PP
50 The routines beginning with
51 .B rune
52 are analogous, but accept an array of runes rather than
53 .SM UTF\c
54 -encoded bytes.
55 .SH FILES
56 .BR /lib/font/bit "    directory of fonts
57 .SH SOURCE
58 .B \*9/src/libdraw
59 .SH "SEE ALSO"
60 .IR addpt (3),
61 .IR cachechars (3),
62 .IR subfont (3),
63 .IR draw (3),
64 .IR draw (3),
65 .IR image (7),
66 .IR font (7)
67 .SH DIAGNOSTICS
68 Because strings are loaded dynamically, these routines may generate I/O
69 to the server and produce calls to the graphics error function.