FTVALID

Section: User Commands (1)
Updated: October 2020
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NAME

ftvalid - font layout table validator

ftvalid [options] fontfile

ftvalid is an OpenType layout table validator.

This program is part of the FreeType demos package.

-f index: Select font index (default: 0).
-t validator: Select validator. Available validators are ot, gx, and ckern.
: Note that the availability of validators depends on compile-time options of FreeType (this is, whether the modules `otvalid' and `gxvalid' are compiled into the library).
-T tbls: [ot, gx] Select sfnt table name tags to be validated. Use `:' to separate tags.
: Supported tables in ot validator are BASE, GDEF, GPOS, GSUB, JSTF, and MATH.
: Supported tables in gx validator are feat, mort, morx, bsln, just, kern, opbd, trak, prop, and lcar.
: Example: -T "feat:morx"
-T dialect: [ckern] Select classic kern dialect for validation. Use `:' to separate dialect names. If more than one dialect is specified, all dialects are accepted when validating.
: Supported dialects in ckern validator are ms and apple.
-l: List the layout-related SFNT tables available in the font file. The selected validator (with option -t) affects the list.
: ckern is applicable to `kern' table only. Option -L lists dialects supported in ckern validator only if `kern' table is available in the font file.
-V level: Validation level. Possible values are 0 (default), 1 (tight), and 2 (paranoid).
-v: Show version.

FT2_DEBUG: You can specify `component:level' pairs for tracing. level must be in the range [1,7].
: Available components for ot validator are otvmodule, otvcommon, otvbase, otvgdef, otvgpos, otvgsub, and otvjstf.
: Available components for gx validator are gxvmodule, gxvcommon, gxvfeat, gxvmort, gxvmorx, gxvbsln, gxvjust, gxvkern, gxvopbd, gxvtrak, gxvprop, and gxvlcar.
: Available component for ckern validator is gxvkern only.
: Example: FT2_DEBUG="otvcommon:5 gxvkern:7"
: FT2_DEBUG only works if tracing support is compiled into FreeType.