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+.TH EQN2GRAPH 1 "7 February 2022" "groff 1.22.4"
+.SH NAME
+eqn2graph \- convert an EQN equation into a cropped image
+.
+.
+.\" ====================================================================
+.\" Legal Terms
+.\" ====================================================================
+.\"
+.\" This documentation is released to the public domain.
+.
+.
+.\" ====================================================================
+.SH SYNOPSIS
+.\" ====================================================================
+.
+.SY eqn2graph
+.OP \-format output-format
+.RI [ convert-arguments ]
+.YS
+.
+.SY eqn2graph
+.B \-\-help
+.YS
+.
+.SY eqn2graph
+.B \-v
+.SY eqn2graph
+.B \-\-version
+.YS
+.
+.
+.\" ====================================================================
+.SH DESCRIPTION
+.\" ====================================================================
+.
+.I eqn2graph
+reads a one-line
+.IR eqn (1)
+equation from the standard input and writes an image file,
+by default in Portable Network Graphics (PNG) format,
+to the standard output.
+.
+.
+.PP
+The input EQN code should
+.I not
+be preceded by the
+.B \&.EQ
+macro that normally precedes it within
+.IR groff (1)
+macros;
+nor do you need to have dollar-sign or other delimiters around the
+equation.
+.
+.
+.\" FIXME: How old?  This text hasn't been touched since 2008 at latest.
+.\" Older versions of
+.\" .I \%convert
+.\" will produce a black-on-white graphic; newer ones may produce a
+.\" black-on-transparent graphic.
+.
+.PP
+Arguments not recognized by
+.I eqn2graph
+are passed to the ImageMagick or GraphicsMagick program
+.IR \%convert (1).
+.
+.
+By specifying these, you can give your image a border,
+.\" Transparent backgrounds are the default in 2018.
+.\" force the background transparent,
+set the image's pixel density,
+or perform other useful transformations.
+.
+.
+.PP
+The output image is clipped using
+.IR \%convert 's
+.B \-trim
+option to the smallest possible bounding box that contains all the black
+pixels.
+.
+.
+.\" ====================================================================
+.SH OPTIONS
+.\" ====================================================================
+.
+.TP
+.BI "\-format " output-format
+Write the image in
+.IR output-format ,
+which must be understood by
+.IR \%convert ;
+the default is PNG.
+.
+.
+.TP
+.B \-\-help
+Display a usage message and exit.
+.
+.
+.TP
+.B \-v
+.TQ
+.B \-\-version
+Display version information and exit.
+.
+.
+.\" ====================================================================
+.SH ENVIRONMENT
+.\" ====================================================================
+.
+.TP
+.I \%GROFF_TMPDIR
+.TQ
+.I \%TMPDIR
+.TQ
+.I TMP
+.TQ
+.I TEMP
+These environment variables are searched in the given order to determine
+the directory where temporary files will be created.
+.
+If none are set,
+.I /tmp
+is used.
+.
+.
+.\" ====================================================================
+.SH AUTHORS
+.\" ====================================================================
+.
+.I eqn2graph
+was written by
+.MT esr@\:thyrsus.com
+Eric S.\& Raymond
+.ME ,
+based on a recipe for
+.IR pic2graph (1),
+by W.\& Richard Stevens.
+.
+.
+.\" ====================================================================
+.SH "SEE ALSO"
+.\" ====================================================================
+.
+.IR pic2graph (1),
+.IR grap2graph (1),
+.IR eqn (1),
+.IR groff (1),
+.IR \%convert (1)
+.
+.
+.\" Local Variables:
+.\" mode: nroff
+.\" End:
+.\" vim: set filetype=groff: