-#!/bin/sh
-convert -compress none -resize 66x23 - pgm:- |
-perl -nE '
-$_ eq "P2\n" or die "ascii pgm input required\n" if $. == 1;
-next if $. <= 3;
-
-state @ch = split //, " .oO@";
-print $ch[ $_ / 256 * @ch ] for /\d+/g;
-print $/;
-'
+#!/usr/bin/perl
+use 5.014;
+my ($file, $size) = @ARGV;
+
+my @info = eval {
+ require Image::ExifTool;
+ my $exif = Image::ExifTool->new->ImageInfo($file);
+ return (
+ " $exif->{MIMEType}",
+ $exif->{ImageSize} ? " $exif->{ImageSize} ($exif->{Megapixels}MP)" : (),
+ join(' ', '',
+ $exif->{YCbCrSubSampling} // (),
+ $exif->{Interlace} // (),
+ $exif->{Compression} // $exif->{FileType},
+ $exif->{SVGVersion} // $exif->{PDFVersion} // (),
+ ),
+ $exif->{ColorType} ? " $exif->{BitDepth}bpp $exif->{ColorType}" : (),
+ sprintf(' exif x%d', scalar %{$exif}),
+ $exif->{Thumb} ? " thumb $exif->{ThumbnailLength}B" : (),
+ (map " @ $_",
+ $exif->{DateCreated} //
+ $exif->{CircaDateCreated} //
+ $exif->{ModifyDate} //
+ $exif->{ZipModifyDate} //
+ (),
+ ),
+ $exif->{GPSPosition} ? " $exif->{GPSPosition}" =~ s/ deg/./gr :
+ $exif->{Location} ? " $exif->{Location}" : (),
+ $exif->{GPSAltitude} ? " $exif->{GPSAltitude}" : (),
+ (map " hw $_", join(' ',
+ $exif->{Make} // (), $exif->{Model} // (),
+ $exif->{FOV} ? "(FOV $exif->{FOV})" : (),
+ ) || ()),
+ (map " sw $_", $exif->{Software} // $exif->{Application} // ()),
+ (map " > $_", $exif->{'Description-nl'} // ()),
+ $exif->{Warning} ? " ! $exif->{Warning}" : (),
+ );
+} or warn $@;
+
+eval {
+ require Digest::MD5;
+ open my $bin, '<', $file;
+ binmode $bin;
+ my $md5 = Digest::MD5->new->addfile($bin);
+ push @info, ' # '.$md5->b64digest;
+} or warn $@;
+
+open my $pgm, '-|', convert => (
+ -compress => 'none',
+ '+distort' => SRT => '0,0 1,.56 0',
+ -thumbnail => $size || '66x23',
+ $file => 'pgm:-'
+) or die $!;
+<$pgm> eq "P2\n" or do {
+ say for @info;
+ exit 1;
+};
+<$pgm>; <$pgm>; # ignore depth, dimensions
+
+my @ch = split //, " .:coO@";
+while (<$pgm>) {
+ print $ch[ $_ * @ch >> 8 ] for /\d+/g;
+ print $info[$. - 4], $/;
+}