| 1 |
#!/usr/bin/perl -w |
| 2 |
|
| 3 |
# pdf2tiles.pl |
| 4 |
# |
| 5 |
# 02/24/08 01:22:36 CET Dobrica Pavlinusic <dpavlin@rot13.org> |
| 6 |
|
| 7 |
use strict; |
| 8 |
|
| 9 |
use Imager; |
| 10 |
use File::Path; |
| 11 |
use Data::Dump qw/dump/; |
| 12 |
|
| 13 |
my $pdf = shift @ARGV || die "usage: $0 filename.pdf"; |
| 14 |
|
| 15 |
my $debug = 0; |
| 16 |
|
| 17 |
my $from_page = 1; |
| 18 |
my $to_page = 2; |
| 19 |
|
| 20 |
my $total_pages = $to_page - $from_page + 1; |
| 21 |
|
| 22 |
my $margin_px = 3; |
| 23 |
my $back_color = Imager::Color->new(255, 255, 240); |
| 24 |
|
| 25 |
my $tiles_path = 'tiles/basic'; |
| 26 |
|
| 27 |
foreach my $path ( $tiles_path, 'ppm' ) { |
| 28 |
rmtree $path if -d $path; |
| 29 |
mkpath $path || die "can't create $path: $!"; |
| 30 |
} |
| 31 |
|
| 32 |
print "redering test 100dpi page to get pixel size\n"; |
| 33 |
system("pdftoppm -f 1 -l 1 -r 100 $pdf ppm/test") == 0 or die "can't render test: $?"; |
| 34 |
my $test = 'ppm/test-000001.ppm'; |
| 35 |
open(my $fh, '<', $test) || die "can't open $test: $!"; |
| 36 |
my $res = <$fh>; |
| 37 |
$res = <$fh>; |
| 38 |
my ( $x_res, $y_res ) = split(/\s+/,$res); |
| 39 |
print "## 100 dpi resolution = $x_res*$y_res\n"; |
| 40 |
close($fh); |
| 41 |
|
| 42 |
$x_res *= $total_pages; |
| 43 |
$x_res += $total_pages * $margin_px; |
| 44 |
|
| 45 |
print "## total size = $x_res*$y_res\n"; |
| 46 |
|
| 47 |
# initial = 2*1 tiles |
| 48 |
my $curr_w = 256 * 2; |
| 49 |
my $curr_h = 256; |
| 50 |
|
| 51 |
my $start_dpi = int( 100 / ( $x_res / $curr_w ) ) - 1; |
| 52 |
|
| 53 |
foreach my $zoom ( 1 .. 10 ) { |
| 54 |
|
| 55 |
my $dpi = $start_dpi * $zoom; |
| 56 |
|
| 57 |
my $ppm = sprintf("ppm/%03d", $dpi); |
| 58 |
|
| 59 |
print "rendering pdf $pdf pages $from_page-$to_page in $dpi dpi\n"; |
| 60 |
|
| 61 |
my $cmd = "pdftoppm -f $from_page -l $to_page -r $dpi -aa yes -aaVector yes $pdf $ppm"; |
| 62 |
system($cmd) == 0 or die "can't start $cmd: $?"; |
| 63 |
|
| 64 |
my @page_imgs; |
| 65 |
|
| 66 |
# size of all pages |
| 67 |
my ( $x_size, $y_size ) = (0,0); |
| 68 |
|
| 69 |
foreach my $page ( $from_page .. $to_page ) { |
| 70 |
|
| 71 |
my $tmp = sprintf("ppm/%03d-%06d.ppm", $dpi, $page); |
| 72 |
die "can't find page $tmp" unless -f $tmp; |
| 73 |
|
| 74 |
my $p_img = Imager->new; |
| 75 |
$p_img->read(file=>$tmp) or die "Can't load $tmp: ", $p_img->errstr; |
| 76 |
|
| 77 |
$x_size += $p_img->getwidth() + $margin_px; |
| 78 |
my $h = $p_img->getheight(); |
| 79 |
$y_size = $h if $h > $y_size; |
| 80 |
|
| 81 |
push @page_imgs, $p_img; |
| 82 |
} |
| 83 |
|
| 84 |
if ( $x_size > $curr_w ) { |
| 85 |
print "WARNING: calculated size with margins $x_size > $curr_w\n"; |
| 86 |
$x_size = $curr_w; |
| 87 |
} |
| 88 |
|
| 89 |
print "loaded $from_page-$to_page of $x_size*$y_size pixels\n"; |
| 90 |
|
| 91 |
sub pad { |
| 92 |
my $s = shift; |
| 93 |
my $l = $s % 256; |
| 94 |
return $l ? 256 - $l : 0; |
| 95 |
} |
| 96 |
|
| 97 |
my ( $full_x, $full_y ) = ( $x_size + pad( $x_size ), $y_size + pad( $y_size ) ); |
| 98 |
|
| 99 |
my $img = Imager->new( xsize => $full_x, ysize => $full_y ); |
| 100 |
$img->box(filled=>1, color=>$back_color); |
| 101 |
|
| 102 |
my $x_pos = int( pad( $x_size ) / 2 ); |
| 103 |
my $y_pos = int( pad( $y_size ) / 2 ); |
| 104 |
|
| 105 |
foreach my $page_img ( @page_imgs ) { |
| 106 |
$img->paste( left => $x_pos, top => $y_pos, img => $page_img ); |
| 107 |
$x_pos += $page_img->getwidth() + $margin_px; |
| 108 |
} |
| 109 |
|
| 110 |
undef @page_imgs; |
| 111 |
|
| 112 |
$img->write( file => sprintf("zoom-%03d.jpg", $dpi ) ) if $debug; |
| 113 |
|
| 114 |
my $tiles_x = int( $x_size / 256 ); |
| 115 |
my $tiles_y = int( $y_size / 256 ); |
| 116 |
|
| 117 |
my $tx_offset = int( ( $curr_w - $x_size ) / ( 2 * 256 ) ); |
| 118 |
my $ty_offset = int( ( $curr_h - $y_size ) / ( 2 * 256 ) ); |
| 119 |
|
| 120 |
print "creating in $tiles_x*$tiles_y tiles from $full_x*$full_y\n"; |
| 121 |
|
| 122 |
for my $y ( 0 .. $tiles_y ) { |
| 123 |
for my $x ( 0 .. $tiles_x ) { |
| 124 |
|
| 125 |
my $size = { |
| 126 |
left => $x * 256, |
| 127 |
bottom => $full_y - $y * 256, |
| 128 |
width => 256, |
| 129 |
height => 256, |
| 130 |
}; |
| 131 |
|
| 132 |
my $tile = $img->crop( %$size ) or die "can't crop $x*$y ",dump( $size ); |
| 133 |
|
| 134 |
my $tx = $x + $tx_offset; |
| 135 |
my $ty = $y + $ty_offset; |
| 136 |
|
| 137 |
# emulate TileCache disk layout |
| 138 |
my $path = sprintf("%s/%02d/%03d/%03d/%03d/%03d/%03d/%03d.png", |
| 139 |
$tiles_path, |
| 140 |
$zoom - 1, # starts with 0 |
| 141 |
int( $tx / 1000000 ), |
| 142 |
int( $tx / 1000 ) % 1000, |
| 143 |
$tx % 1000, |
| 144 |
int( $ty / 1000000 ), |
| 145 |
int( $ty / 1000 ) % 1000, |
| 146 |
$ty % 1000 |
| 147 |
); |
| 148 |
|
| 149 |
my $dir = $path; |
| 150 |
$dir =~ s,/[^/]+$,,; |
| 151 |
mkpath $dir unless -d $dir; |
| 152 |
|
| 153 |
$tile->write( file => $path ) or die $tile->errstr; |
| 154 |
|
| 155 |
undef $tile; |
| 156 |
|
| 157 |
printf("# %2dx%-2d => %2dx%-2d %s\n", $x, $y, $tx, $ty, $path); |
| 158 |
|
| 159 |
} |
| 160 |
} |
| 161 |
|
| 162 |
# break if zoom level over 300dpi |
| 163 |
last if $dpi > 300; |
| 164 |
|
| 165 |
# increase virtual size twice |
| 166 |
$curr_w += $curr_w; |
| 167 |
$curr_h += $curr_h; |
| 168 |
} |
| 169 |
|
| 170 |
|
Parent Directory
| 
Revision Log