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Diffstat (limited to 'pscrop.pl')
| -rwxr-xr-x | pscrop.pl | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/pscrop.pl b/pscrop.pl new file mode 100755 index 0000000..6b61df4 --- /dev/null +++ b/pscrop.pl @@ -0,0 +1,244 @@ +#!/usr/bin/perl -w + +=head1 SYNOPSIS + +psnup2.pl - a better psnup + +For details, see http://consodoc.com/psnup2/ + +=head1 USAGE + +psnup2.pl -d -m <margin> -w <page_width> -h <page_height> + -l <n_long_edge> -s <n_short_edge> -r <reverse> -D + SOURCE [DEST] + +-d If specified, only prints out the command. +-m Margin, in centimeters, that should be kept around the page. Default to 1. +-w Resulting page width, in centimeters. Default to 21. +-h Resulting page height, in centimeters. Default to 29.7. +-l Number of pages to fit on the long edge. Default to 2. +-s Number of pages to fit on the short edge. Default to 1. +-r If specified, the order is reversed on the long edge. +-D Rotation direction, if needed ("L" or "R"). Default to "L". + +=head1 REQUIRE + +Requires psutils installed and available in the command line +http://www.tardis.ed.ac.uk/~ajcd/psutils/ + +=head1 AUTHOR + +Public domain, (c) Oleg Parashchenko, Lionel Guy + +=head1 VERSION + +Version: 0.0.5, 23 October 2008 + +=cut + +use strict; +use Getopt::Std; + +# +# Set default options +# +our ($opt_d, $opt_r); +our $opt_m = 1; # in centimeters +our ($opt_w, $opt_h) = (21.0, 29.7); # in centimeters, A4 +our ($opt_l, $opt_s) = (2, 1); # Default: 2 pages per page + +our $opt_D = 'L'; # 'L' or 'R'. How to rotate, if required. + +my $units_per_cm = 72 * .3937; # 1 centimeters = .393700787 inches, 1 inch = 72 PostScript units5 + +# +# Parse command line +# +getopts("dm:w:h:l:s:r"); + +my ($in_file, $out_file) = @ARGV; +die "No input file" unless $in_file; + +# +# Calculate the maximal bounding box +# +my ($x1, $y1, $x2, $y2) = (32000, 32000, -32000, -32000); +my $cmdline = "gs -sDEVICE=bbox -dBATCH -dNOPAUSE $in_file 2>&1 |"; +(open FIN, $cmdline) or die "Can't run: '$cmdline'"; +while (defined (my $l = <FIN>)) { + #print $l; + if ($l =~ m/^\%\%BoundingBox: (\d+) (\d+) (\d+) (\d+)/) { + $x1 = $1 if $1 < $x1; + $y1 = $2 if $2 < $y1; + $x2 = $3 if $3 > $x2; + $y2 = $4 if $4 > $y2; + } +} +close FIN; +die "Error calculating bounding box" if (($x1 >= $x2) || ($y1 >= $y2)); +#print "Bounding box: ($x1,$y1), ($x2,$y2)\n"; +my @bbox = ($x1, $y1, $x2, $y2); + +# +# Calculate pstops specification +# +my @views = &calculate_views_short_x_long($opt_s, $opt_l, $opt_r); + +my $spec = scalar(@views); +for (my $i = 0; $i < scalar(@views); $i++) { + my $s = &calc_pstops_page(\@bbox, $views[$i]); + $spec .= ($i ? '+' : ':') . $i. $s; +} +my ($w, $h) = ($opt_w * $units_per_cm, $opt_h * $units_per_cm); +$w = int($w + .5); +$h = int($h + .5); +my $ps_size_spec = "\%\%BeginFeature: *PageSize ($w $h)\n<< /PageSize [$w $h] >> setpagedevice\n\%\%EndFeature\n"; + +# +# Dry run? Only print the specification +# +$cmdline = "pstops -w$w -h$h '$spec' $in_file"; +if ($opt_d) { + print "$cmdline $out_file\nAnd add after the first '\%\%EndComments':\n$ps_size_spec"; + exit(0); +} + +# +# Run the program and filter the output +# +my $PStoPSclip_hack = 1; +$out_file = '-' unless $out_file; +(open FOUT, ">$out_file") or die "Can't create '$out_file': $!\n"; +(open FIN, "$cmdline|") or die "Can't run '$cmdline': $!\n"; +while (my $l = <FIN>) { + # Optional, but nice: tune how "gv" will show the document + next if $l =~ m/^\%\%DocumentMedia:/; + if ($l =~ m/^\%\%BoundingBox:/) { + (print FOUT "\%\%BoundingBox: 0 0 $w $h\n") or die "Can't print: $!"; + next; + } + (print FOUT $l) or die "Can't print: $!"; + chomp $l; + # Important to print the document right + if ('%%EndComments' eq $l) { + (print FOUT $ps_size_spec) or die "Can't print: $!"; + last; + } +} +while (my $l = <FIN>) { + (print FOUT $l) or die "Can't print: $!"; + if ($PStoPSclip_hack && ($l =~ m/^userdict\/PStoPSclip{0 0 moveto$/)) { + $l = <FIN>; + $l =~ s/\./0./g; # Increase clipping box by 10 + (print FOUT $l) or die "Can't print: $!"; + } +} +(close FIN) or die "Can't close '$cmdline': $!"; +(close FOUT) or die "Can't close '$out_file': $!"; + +# ========================================================= + +# +# Calculate an item of the pstops specification +# +sub calc_pstops_page { + my ($box_from, $box_to) = @_; + #print 'bbox_from: ', join(' ', @$box_from), "\n"; + #print 'bbox_to: ', join(' ', @$box_to), "\n"; + # + # Check if rotation required + # + my ($width_from, $height_from) = ($box_from->[2] - $box_from->[0], + $box_from->[3] - $box_from->[1]); + my ($width_to, $height_to) = ($box_to->[2] - $box_to->[0], + $box_to->[3] - $box_to->[1]); + my $rotation = (($width_from > $height_from) xor ($width_to > $height_to)); + # + # Scale factor + # + my ($scale1, $scale2); + if ($rotation) { + ($scale1, $scale2) = ($height_to / $width_from, + $width_to / $height_from); + } else { + ($scale1, $scale2) = ($width_to / $width_from, + $height_to / $height_from); + } + my $scale = ($scale1 > $scale2) ? $scale2 : $scale1; + #print "scale 1,2,common: [$scale1] [$scale2] [$scale]\n"; + # + # Calculate the centers of the boxes + # + my ($cx, $cy) = (.5 * ($box_from->[0] + $box_from->[2]), + .5 * ($box_from->[1] + $box_from->[3])); + my ($cx_to, $cy_to) = (.5 * ($box_to->[0] + $box_to->[2]), + .5 * ($box_to->[1] + $box_to->[3])); + # + # Fist, pstops scales, then rotates, then moves + # + ($cx, $cy) = ($cx * $scale, $cy * $scale); + if ($rotation) { + $rotation = $opt_D; + if ('L' eq $rotation) { + ($cx, $cy) = (-$cy, $cx); + } elsif ('R' eq $rotation) { + ($cx, $cy) = ($cy, -$cx); + } else { + die "Unknown rotation"; + } + } + my ($movex, $movey) = ($cx_to - $cx, $cy_to - $cy); + # + # Generate the summary + # + my $s = sprintf('%s@%.3f(%.1f,%.1f)', $rotation, $scale, $movex, $movey); + #print "pstops string: [$s]\n"; + return $s; +} + +# ========================================================= + +# +# Calculate coordinates of splitting the dimension on K chunks +# Returns an array, each item is a reference to an array of two +# elements: the begin and end coordinates +# +sub calculate_coordinates { + my ($length, $opt_m, $n) = @_; + my $skip = ($length - $opt_m) / $n; + my $width = $skip - $opt_m; + my @end_coords = map { int(.5 + $skip * $_) } (1..$n); + my @coords = map { my @a = (int(.5 + $_ - $width), $_); \@a } @end_coords; + #print "$n: "; map { print '[', $_->[0], ',', $_->[1], ']' } @coords; print "\n"; + return @coords; +} + +# +# N_short_edge * N_long_edge views paer page +# (For A4, short == width, long == height) +# +sub calculate_views_short_x_long { + my ($n_short_edge, $n_long_edge, $long_reverse) = @_; + my ($pu_width, $pu_height, $pu_margin) + = ($opt_w * $units_per_cm, $opt_h * $units_per_cm, + $opt_m * $units_per_cm); + my @short_coordinates = + &calculate_coordinates($pu_width, $pu_margin, $n_short_edge); + my @long_coordinates = + &calculate_coordinates($pu_height, $pu_margin, $n_long_edge); + if ($long_reverse) { + @long_coordinates = reverse @long_coordinates; + } + my @views; + foreach my $x_coords (@short_coordinates) { + foreach my $y_coords (@long_coordinates) { + my @view = ($x_coords->[0], $y_coords->[0], + $x_coords->[1], $y_coords->[1]); + push @views, \@view; + } + } + return @views; +} + + + |