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.TH FTLINT 1 "August 2023" "FreeType 2.13.2"
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.SH NAME
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ftlint \- simple font tester
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.SH SYNOPSIS
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.B ftlint
.RI [ options ]
.I ppem
.IR font .\|.\|.
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.SH DESCRIPTION
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.B ftlint
opens the given font(s), loads and renders glyphs at the given ppem value.
The shape complexity of outline glyphs are examined based on their taxicab
perimeters: the higher the number, the more complex the shape.
For successfully rendered glyphs, it calculates the bitmap MD5 checksum
for regression testing as well as horizontal (X) and vertical (Y) acutances
for quality assessment.  The acutance is equal to 2.0 for monochrome bitmap
fonts and approaches this value for hinted anti-aliased fonts.
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.TP
.B ppem
Size in pixels per EM.
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.TP
.B font
The font file(s) to test.
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.PP
This program is part of the FreeType demos package.
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.SH OPTIONS
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.TP
.BI \-f \ L
Use
.B hexadecimal
(not decimal) number
.I L
defined by
.B \%FT_\:LOAD_\:XXX
flags (default is 0).
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.TP
.BI \-r \ N
Set render mode to
.IR N :
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.RS
.TS
tab (@);
rB l.
0@normal
1@light
2@mono
3@horizontal LCD
4@vertical LCD
.TE
.RE
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.IP
which corresponds to the values of the
.B \%FT_\:RENDER_\:MODE_\:XXX
enumeration (default is 0).
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.TP
.BI \-i \ I-J
Range of glyph indices to use (default: all).
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.TP
.B \-q
Quiet mode without the rendering analysis.
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