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SFDDIFF(1) SFDDIFF(1)
NAME
sfddiff - compare two font files
SYNOPSIS
sfddiff [--help] [--ignorehints] [--ignorenames] [--ignoreg‐
pos] [--ignoregsub] [--ignorebitmaps] [--exact] [--warn]
[-merge outfile] [--usage] [--version] fontfile1 fontfile2
DESCRIPTION
The program sfddiff compares two font files, which may be in
any format fontforge(1) can read. It will notice the follow‐
ing differences:
1) Characters are present in one font but not in the
other.
2) Characters are present in both fonts but have differ‐
ent sets of outlines or references. The outlines may
be compared so that only exact matches are accepted,
or so that a fuzzier match is used. Similarly refer‐
ences may need to match exactly, or may be matched
after an unlink.
This fuzzy comparison is useful when comparing truetype and
postscript fonts, or when comparing a font with references to
one without.
3) The postscript hints or truetype instructions are dif‐
ferent.
4) The font names (the truetype 'name' table) differ.
5) The kerning (and other gpos information) differs.
6) The ligatures (and other gsub information) differ.
7) Any bitmap strikes present in one font but not in the
other.
8) Any bitmap characters present in one strike of one
font but in the equivalent strike of the other.
9) Any bitmap characters which differ.
OPTIONS
--help Provide a description with a list of the available
options.
--ignorehints
Suppress the reporting of hint/instruction differ‐
ences.
--ignoregpos
Suppress the reporting of kerning (and other gpos)
differences.
--ignoregsub
Suppress the reporting of ligature (and other gsub)
differences.
--ignorenames
Suppress the reporting of name string differences.
--ignorebitmaps
Suppress the reporting of bitmap differences.
--exact
Require outlines to match exactly.
--warn Warn if the outlines/references are slightly differ‐
ent.
-merge outfile
Store a merged version of the two fonts into the spec‐
ified output file. The merged data will be based on
sfdfile1, as well as any characters present in sfd‐
file2 but not in sfdfile1willbeadded,andtheoutlinesof
sfdfile2 will be placed in the background. Finally,
for any characters with different outlines or refer‐
ences the background of the the character will contain
the outlines from sfdfile2 (references will be
unlinked into outlines and those outlines also will be
added)
--usage
Display the usage description.
--version
Display the current version
SEE ALSO
fontforge(1)
The HTML version of the fontforge manual at:
http://fontforge.sourceforge.net/
AUTHOR
Copyright (C) 2000-2006 by George Williams (gww@silcom.com).
Manual page heavily rewritten and modified to use standard
-man(5) macros by R.P.C. Rodgers (rodgers@nlm.nih.gov), 23
October 2002.
8 April 2006 SFDDIFF(1)