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Re: [Groff] PDF_IMAGE and MOM

From: Ralph Corderoy
Subject: Re: [Groff] PDF_IMAGE and MOM
Date: Mon, 03 Nov 2014 16:36:04 +0000

Hi Mikkel,

> I use sam2p to convert PNM image to PDF (I can highly recommend the
> small program sam2p). When I later try to find the image bounding box
> using this command
> gs -q -dBATCH -dNOPAUSE -sDEVICE=bbox <image file>.pdf 2>&1 \ | grep
> "%%BoundingBox" | cut -d " " -f4,5
> Could I see the image bounding box was set to:
> 1866 x 1866 points

I tend to use pnmtops(1) and then ps2pdf(1), e.g.

    w=1866 h=1866
    win=$(bc -l <<<"$w / $dpi")
    hin=$(bc -l <<<"$h / $dpi")
    wpt=$(bc -l <<<"$win * 72")
    hpt=$(bc -l <<<"$hin * 72")

    testpnm() {
        pbmpage 1 |
        pnmcut -l $(((5100 - w) / 2)) -w $w -t $(((6600 - $h) / 2)) -h $h

    testpnm |
    pnmtops -dpi $dpi -equalpixels -width $win -height $hin |
    ps2pdf -dDEVICEWIDTHPOINTS=$wpt -dDEVICEHEIGHTPOINTS=$hpt - foo.pdf

I expect ps2pdf can produce EPS with the right settings if that's

BTW, your had a blank line at the start and the comments were
lines starting `\#' rather than `.\#'.  One or the other might have an
affect on your attempt at A3 in mom, I don't know.

Cheers, Ralph.

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