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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 $from_page = 1; |
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my $to_page = 4; |
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my $tiles_path = 'tiles/basic'; |
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foreach my $path ( $tiles_path, 'ppm' ) { |
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rmtree $path if -d $path; |
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mkpath $path || die "can't create $path: $!"; |
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} |
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print "redering test 100dpi page to get pixel size\n"; |
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system("pdftoppm -f 1 -l 1 -r 100 $pdf ppm/test") == 0 or die "can't render test: $?"; |
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my $test = 'ppm/test-000001.ppm'; |
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open(my $fh, '<', $test) || die "can't open $test: $!"; |
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my $res = <$fh>; |
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$res = <$fh>; |
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my ( $x_res, $y_res ) = split(/\s+/,$res); |
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print "## 100 dpi resolution = $x_res*$y_res\n"; |
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close($fh); |
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$x_res *= ( $to_page - $from_page + 1 ); |
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print "## total size = $x_res*$y_res\n"; |
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# initial width = 2 tiles |
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my $start_dpi = int( 100 / ( $x_res / 512 ) ); |
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foreach my $zoom ( 1 .. 10 ) { |
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my $dpi = $start_dpi * $zoom; |
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my $ppm = sprintf("ppm/%03d", $dpi); |
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print "rendering pdf $pdf pages $from_page-$to_page in $dpi dpi\n"; |
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my $cmd = "pdftoppm -f $from_page -l $to_page -r $dpi -aa yes -aaVector yes $pdf $ppm"; |
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system($cmd) == 0 or die "can't start $cmd: $?"; |
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my @page_imgs; |
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# size of all pages |
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my ( $x_size, $y_size ) = (0,0); |
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foreach my $page ( $from_page .. $to_page ) { |
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my $tmp = sprintf("ppm/%03d-%06d.ppm", $dpi, $page); |
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die "can't find page $tmp" unless -f $tmp; |
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my $p_img = Imager->new; |
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$p_img->read(file=>$tmp) or die "Can't load $tmp: ", $p_img->errstr; |
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$x_size += $p_img->getwidth(); |
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my $h = $p_img->getheight(); |
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$y_size = $h if $h > $y_size; |
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push @page_imgs, $p_img; |
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} |
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print "loaded $from_page-$to_page of $x_size*$y_size pixels\n"; |
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my $back_color = Imager::Color->new(255, 127, 127); |
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my $img = Imager->new( xsize => $x_size, ysize => $y_size ); |
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$img->box(filled=>1, color=>$back_color); |
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my $x_pos = 0; |
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foreach my $page_img ( @page_imgs ) { |
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$img->paste( left => $x_pos, top => 0, img => $page_img ); |
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$x_pos += $page_img->getwidth(); |
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} |
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undef @page_imgs; |
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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->box(filled=>1, color=>$back_color); |
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$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 $path = sprintf("%s/%02d/%03d/%03d/%03d/%03d/%03d/%03d.png", |
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$tiles_path, |
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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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# break if zoom level over 300dpi |
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last if $dpi > 300; |
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} |
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