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.TH LIBPARSEPSF_GET_GLYPH 3 LIBPARSEPSF
.SH NAME
libparsepsf_get_glyph \- Get glyph to use in a position in a text
.SH SYNOPSIS
.nf
#include <libparsepsf.h>
size_t libparsepsf_get_glyph(struct libparsepsf_font *\fIfont\fP, const char *\fIc\fP, size_t *\fIremp\fP, const char **\fInext_cp\fP);
.fi
.PP
Link with
.IR -lparsepsf .
.SH DESCRIPTION
The
.B libparsepsf_get_glyph
function gets the next glyph to print for a line of text.
.PP
.I font
be a parsed font: created with
.BR libparsepsf_parse_font (3).
.PP
.I c
shall be the current position in the text, and either
.I remp
shall be
.I NULL
or
.I *remp
shall be the number of bytes remaining in the text.
.PP
Upon successful completion, the number of bytes
read from
.I c
will be subtracted from
.IR *remp
(unless
.I remp
is
.IR NULL ),
and, unless
.I next_cp
is
.I NULL,
.I *next_cp
will be set to
.I &c[n]
where
.I n
is the number of bytes in the byte-sequence for the
returned glyph.
.PP
If and only if
.I remp
is
.IR NULL ,
the
.B libparsepsf_get_glyph
function will assume the text ends at the first NUL byte.
.PP
.I *remp
and
.I *next_cp
are only updated if the function returns a non-zero value.
.SH RETURN VALUE
The
.B libparsepsf_get_glyph
function returned a glyph index, plus 1, upon successful
completion, or 0 if the end of the text has been reached
or if there is no glyph for the current position. On
failure the function returns 0 and sets
.I errno
appropriately to indicate the error.
.SH ERRORS
The
.B libparsepsf_get_glyph
function may fail if:
.TP
.B EILSEQ
If
.I font->map
is
.I NULL
and an illegal byte sequence was found.
.SH NOTE
A sequence of multiple characters can be rendered as a
single glyph, therefore it is important that the entire
text line has been loaded and all characters on
the line in prior positions have been mapped.
.PP
The
.B libparsepsf_get_glyph
function does not treat <newline> especially.
.SH SEE ALSO
.BR libparsepsf_parse_font (3)
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