.TH ftvalid 1 "July 2013" "FreeType User Manuals"
.SH NAME
.PP
ftvalid \- font layout table validator
.SH SYNOPSIS
.B ftvalid
.RI [ options ]
.I fontfile
.SH DESCRIPTION
.B ftvalid
is a layout table validator from the FreeType project.
.SH OPTIONS
.TP
.BI \-f\  index
Select font index (default: 0).
.TP
.BI \-t\  validator
Select validator. Available validators: "ot" "gx" "ckern"
.TP
.BI \-T\  "sfnt:tabl:enam:es"
Select snft table names to be validated. `:' is for separating table names.

Supported tables in ot validator are:
BASE GDEF GPOS GSUB JSTF MATH

Supported tables in gx validator are:
feat mort morx bsln just kern opbd trak prop lcar
.TP
.BI \-T\  "ms:apple"
[ckern] Select (a) classic kern dialect(s) for validation. `:' is for
separating dialect names.  If more than one dialects is specified, all
dialects are accepted when validating.

Supported dialects in ckern validator are: ms apple
.TP
.BI \-L
List the layout related SFNT tables available in the font file. Choice
of validator with -t option affects on the listing.

ckern is applicable to kern table. -L lists dialects supported in ckern
validator only if kern table is available in the font file.

.TP
.BI \-v\  validation_level
Validation level.  validation_level = 0...2 (0: default, 1: tight, 2:
paranoid)
.SH ENVIRONMENT VARIABLES
.TP
.B FT2_DEBUG
You can specify trace components and their levels[1-7] to it like
FT2_DEBUG="module1:level module2:level...".

Available components for ot validator: otvmodule otvcommon otvbase
otvgdef otvgpos otvgsub otvjstf

Available components for gx validator: gxvmodule gxvcommon gxvfeat
gxvmort gxvmorx gxvbsln gxvjust gxvkern gxvopbd gxvtrak gxvprop gxvlcar

Only gxvkern is available for ckern validator.