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dpavlin |
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#!/usr/bin/perl -w |
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# pdf2tiles.pl |
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# |
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# 02/24/08 01:22:36 CET Dobrica Pavlinusic <dpavlin@rot13.org> |
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use strict; |
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use Imager; |
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use File::Path; |
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use Data::Dump qw/dump/; |
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my $pdf = shift @ARGV || die "usage: $0 filename.pdf"; |
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my $limit = ''; |
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$limit = '-f 1 -l 1'; |
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foreach my $zoom ( 1 .. 12 ) { |
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my $dpi = $zoom * 25; |
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my $ppm = "tmp-$dpi"; |
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my $tmp = "$ppm-000001.ppm"; |
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print "rendering pdf $pdf in $dpi dpi to $tmp\n"; |
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system "pdftoppm $limit -r $dpi -aa yes -aaVector yes $pdf $ppm"; |
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die "can't render" unless -f $tmp; |
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my $img = Imager->new; |
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$img->read(file=>$tmp) or die "Can't load $tmp: ", $img->errstr; |
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my $x_size = $img->getwidth(); |
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my $y_size = $img->getheight(); |
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print "loaded $tmp $x_size*$y_size pixels\n"; |
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my $tiles_x = int( $x_size / 256 ); |
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my $tiles_y = int( $y_size / 256 ); |
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print "creating in $tiles_x*$tiles_y tiles...\n"; |
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for my $y ( 0 .. $tiles_y ) { |
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for my $x ( 0 .. $tiles_x ) { |
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my $size = { |
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left => $x * 256, |
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bottom => $y_size - $y * 256, |
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width => $x == $tiles_x ? $x_size % 256 : 256, |
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height => $y == $tiles_y ? $y_size % 256 : 256, |
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}; |
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my $tile = $img->crop( %$size ) or die "can't crop $x*$y ",dump( $size ); |
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if ( ( $x == $tiles_x ) || ( $y == $tiles_y ) ) { |
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warn "## expand tile to full size\n"; |
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my $t2 = Imager->new(xsize => 256, ysize => 256); |
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$t2->paste( |
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top => 256 - $size->{height}, |
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left => 0, |
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src => $tile, |
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); |
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$tile = $t2; |
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} |
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# emulate TileCache disk layout |
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my $path = sprintf("tiles/basic/%02d/%03d/%03d/%03d/%03d/%03d/%03d.png", |
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$zoom - 1, # starts with 0 |
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int( $x / 1000000 ), |
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int( $x / 1000 ) % 1000, |
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$x % 1000, |
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int( $y / 1000000 ), |
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int( $y / 1000 ) % 1000, |
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$y % 1000 |
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); |
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my $dir = $path; |
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$dir =~ s,/[^/]+$,,; |
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mkpath $dir unless -d $dir; |
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$tile->write( file => $path ) or die $tile->errstr; |
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undef $tile; |
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print "# $x*$y -> $path\n"; |
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} |
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} |
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} |
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