sfddiff1

Usage

." Copyright (c) 2000-2006 by George Williams ([email protected]). Manual ." page heavily rewritten and modified to use standard -man(5) macros ." by R.P.C. Rodgers ([email protected]), 23 October 2002. Paul Hardy ." reconstructed the original man page in 2017.

Overview

The program sfddiff compares two font files, which may be in any format that fontforge(1) can read. It will notice the following differences:

1)

Characters are present in one font but not in the other.

2)

Characters are present in both fonts but have different 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 references 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 different.

4)

The font names (the TrueType 'name' tables) 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 not 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 differences.

--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 different.

--merge outfile

Store a merged version of the two fonts into the specified output file. The merged data will be based on sfdfile1, any characters present in sfdfile2 but not in sfdfile1 will be added, and the outlines of sfdfile2 will be placed in the background. Finally, for any characters with different outlines or references the background of 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.

Note

FontForge used to be called PfaEdit.