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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
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treeb460cd850d0537eb71806ba30358840377b27688 /static/v10/man9/string.9
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-.TH STRING 9.3
-.CT 2 comm_term
-.SH NAME
-string, defont, strwidth, infont, outfont, getfont \- text and font operations
-.SH SYNOPSIS
-.B #include <jerq.h>
-.br
-.B #include <font.h>
-.PP
-.B Point string(ft, s, b, p, f)
-.B "Font *ft; char *s; Bitmap *b; Point p; Code f;
-.PP
-.B extern Font defont;
-.PP
-.B "int strwidth(ft, s) Font *ft; char *s;
-.PP
-.B "Font *infont(inch) int (*inch)();
-.PP
-.B "int outfont(ft, ouch) Font *ft; int (*ouch)();
-.PP
-.B void ffree(ft) Font *ft;
-.PP
-.B #include <jerqio.h>
-.PP
-.B "Font *getfont(file) char *file;
-.SH DESCRIPTION
-.I String
-draws the null-terminated string
-.I s
-using characters from font
-.I ft
-in Bitmap
-.I b
-at Point
-.IR p ,
-with Code
-.IR f .
-The return value is the location of the first character
-.I after
-.IR s ;
-passed to another call to
-.IR string ,
-the two strings will be concatenated.
-The characters are drawn such that the
-.B origin
-point of the bounding rectangle of a maximum height character
-lies at
-.IR p .
-Therefore, a character drawn on the screen at (0,0)
-will occupy the upper-leftmost character position on the screen.
-.I String
-draws characters as they are in the font.
-No special action is taken for control characters such as tabs or newlines.
-.PP
-The global
-.I defont
-is the name of the standard font (not a pointer to it).
-.PP
-.I Strwidth
-returns the width in pixels
-of the null-terminated string
-.IR s ,
-interpreted in the Font
-.IR *ft .
-The height of a character string is simply
-.BI ft ->height.
-.PP
-.I Infont
-creates a font by reading the byte-wise binary representation
-returned by successive calls to
-.IR inch .
-It returns 0
-on error.
-.I Inch
-must return successive bytes of the Unix file representation of the font,
-and \-1
-at end-of-file.
-.I Outfont
-calls the routine
-.I ouch
-to write successive bytes of the binary representation of font
-.IR ft .
-It returns
-\-1
-on error, as must
-.I ouch .
-For programs running under
-.IR jx ,
-.I getfont
-returns a pointer to a font read from the named
-.IR file ,
-essentially by calling
-.I infont
-with argument routine
-.IR getc .
-It returns 0
-on error.
-.I Ffree
-frees a font allocated by
-.I infont
-or
-.IR getfont .