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#!/usr/bin/perl
# Copyright © 2013 Guilhem Moulin <guilhem@fripost.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
our $VERSION = "0.3, August 13, 2013";
use 5.010_000;
use warnings;
use strict;
=head1 NAME
mkindex.pl - Merge a mapset into an index file
=head1 SYNOPSIS
B<mkindex.pl> [B<-q>] [B<-d>] [B<--rename> I<perlexpr>] [B<-s> I<geometry>]
[B<-r> I<method>] [B<-b> I<border>] [B<-f> I<font>] [B<--s_srs> I<SRS>]
[B<--t_srs> I<SRS>] I<map> [... I<map>] I<index>
B<mkindex.pl> B<--man>
=head1 DESCRIPTION
Merge all given I<map>s into an index file, and annotate this index with
tile borders and names.
If required, each map is first expanded into RGBA, to get a decent
resampling. This expansion can take a significant amount of space. An
alternative, much slower but which require nearly no extra space, is to
create expanded VRTs:
for x in *.tif; do gdal_translate -expand rgba -of VRT $x ${x%.tif}.vrt; done
mkindex.pl *.vrt index.png
=head1 OPTIONS
=over 8
=item B<-q>, B<--quiet>
Be quiet.
=item B<-d>, B<--debug>
Debug mode.
=item B<--rename>=I<perlexpr>
A Perl expression which is expected to modify the $_ string in Perl (set
to each filename), to what should be displayed on the final index. The
default is 's/\.[^.]+$//' that is, only the file extension is stripped
away. See the B<EXAMPLES> section for other examples.
=item B<-s> I<width>xI<height>, B<--size=>I<width>xI<height>
The size of the output index (default: 1024x0). If I<width> or I<height>
is 0, the other dimension will be guessed from the computed resolution.
=item B<-r> I<resampling_method>, B<--resampling=>I<resampling_method>
The resampling method to use. See gdalwarp(1) for the default and list
of possible values.
=item B<-b> I<width>[:I<color>], B<--border=>I<width>[:I<color>]
The I<width> and I<color> of the border to draw around each tile
(default: C<10:red>). I<width> is given in pixels, and I<color> needs to
comply to ImageMagick's Color Model Specification; see convert(1) for
details.
If one of I<width> or I<color> is left empty, the corresponding default
is used (but the other can be specified regardless, for instance in
C<:blue>).
=item B<-f> I<font>[:I<color>[:I<font>]], B<--font=>I<size>[:I<color>[:I<font>]]
The point I<size>, I<color> and I<font> to use when annotating each tile
with its name (default: C<25::Helvetica>). I<color> and I<font> need to
be ImageMagick-compatible; see convert(1) for details.
If I<color> is blank empty, the border's color is used instead.
If one of I<width> or I<font> is left empty, the corresponding default
is used (but the other can be specified regardless, for instance in
C<::DejaVu-Sans-Book>).
=item B<--s_srs=>I<SRS>
The source spatial reference set. If the input I<map>s include a SRS, it is
ignored. I<SRS> can be passed in any format format understood by
C<OGRSpatialReference.SetFromUserInput>, see gdalwarp(1) for details.
=item B<--t_srs=>I<SRS>
The target spatial reference set. This is required unless all I<map>s
have the same SRS, or if B<--s_srs> is used (in which case that SRS is
used for the target index).
I<SRS> can be passed in any format format understood by
C<OGRSpatialReference.SetFromUserInput>, see gdalwarp(1) for details.
=item B<--help>
Show a brief help.
=item B<--version>
Show the version numbers.
=item B<--man>
Show the manpage.
=back
=head1 EXAMPLES
=over 4
=item mkindex.pl *.tif miff:- | display -
Create an index with all TIFF files in the current directory; don't save
the index, but pipe it to display(1).
=item mkindex.pl -b '15:RGBA(255,0,0,.25)' --s_srs=epsg:3067 *.tif index.tif
Assume all map to be projected in EPSG:3067. Draw a 15-pixels wide , 25%
transparent red around each tile.
=item mkindex.pl -f '75::DejaVu-Sans-Book' --rename='s/U(.*)_RVK_25\.tif/$1/' *.tif index.tif
Use DejaVu Sans with a pointsize of 75 for the captions. Also, display
only the non-redundant part of the filenames.
=back
=head1 ENVIRONMENT
A temporary working directory is created under the B<TMPDIR> (or C</tmp>
if unset, at least in Unix:es), see C<File::Spec::tmpdir()>.
=head1 REQUIREMENTS
=over 4
=item *
Requires L<gdalwarp|http://gdal.org/> available on the command line.
=item *
Requires the perl modules
L<Inline|http://search.cpan.org/~sisyphus/Inline-0.53/C/C.pod>,
L<Geo::GDAL|http://geoinformatics.aalto.fi/doc/Geo-GDAL/html/>,
L<Geo::OSR|http://geoinformatics.aalto.fi/doc/Geo-GDAL/html/> and
L<Image::Magick|http://www.imagemagick.org/script/perl-magick.php>,
all available on L<CPAN|http://www.cpan.org/>.
=back
=head1 AUTHOR
Copyright 2013 Guilhem Moulin. mkindex is free software,
distributed under the GNU Public License, version 3 or later.
=cut
use Getopt::Long qw/:config posix_default no_ignore_case gnu_compat
bundling auto_version auto_help/;
use Pod::Usage;
use File::Temp;
use File::Basename;
use Inline 'C';
# http://geoinformatics.aalto.fi/doc/Geo-GDAL-1.9/html/
use Geo::GDAL;
use Geo::OSR;
# http://www.imagemagick.org/script/perl-magick.php
use Image::Magick;
my %config = ( progress => sub {
# Geo::GDAL::TermProgress_nocb writes to STDOUT
open my $x, '>&', \*STDOUT or die "Can't dup STDOUT: $!";
open STDOUT, '>&', STDERR or die "Can't dup STDERR: $!";
Geo::GDAL::TermProgress_nocb(@_[0,1]);
open STDOUT, '>&', $x or die "Can't dup X: $!";
close $x;
}
, debug => 0
, rename => 's/\.[^.]+$//'
, outsize => [ 1024, 0 ]
, border => 10
, bordercolor=> 'red'
, fontsize => 25
, font => 'Helvetica'
, wm => 512
);
my $gdal_opts = { INTERLEAVE => 'BAND'
, TILED => 'YES'
, COMPRESS => 'LZW'
};
GetOptions( "q|quiet" => sub { delete $config{progress} }
, "d|debug" => \$config{debug}
, "rename=s" => sub { pod2usage(2) unless $_[1] =~ /^s(.).+\1[ixgcadlu]*$/;
$config{rename} = $_[1]
}
, "s|size=s" => sub { pod2usage(2) unless $_[1] =~ /^(\d+)x(\d+)$/;
$config{outsize} = [ $1, $2 ];
}
, "r|resampling=s"=> \$config{resampling}
, "b|border=s"=> sub { if ($_[1] =~ /^(?<b>\d*)(?<bc>:.*)?$/) {
$config{border} = $+{b} if $+{b};
$config{bordercolor} = $1 if $+{bc} =~ /^:(.+)/;
}
else {
pod2usage(2);
}
}
, "f|font=s" => sub { if ($_[1] =~ /^(?<fs>\d*)(?<fc>:.*)?(?<f>:[^:]*)?$/) {
$config{fontsize} = $+{fs} if $+{fs};
$config{fontcolor} = $1 if $+{fc} =~ /^:(.+)/;
$config{font} = $1 if $+{f} =~ /^:(.+)/;
}
else {
pod2usage(2);
}
}
, "s_srs=s" => sub { $config{s_srs} = Geo::OSR::SpatialReference::->new();
$config{s_srs}->SetFromUserInput( $_[1] ) }
, "t_srs=s" => sub { $config{t_srs} = Geo::OSR::SpatialReference::->new();
$config{t_srs}->SetFromUserInput( $_[1] ) }
, "man" => sub { pod2usage(-exitstatus => 0, -verbose => 2) }
)
or pod2usage(2);
# TODO: -n|--numeric: put numbers instead of text
# TODO: -o|--overview: use a different overview mapset
# TODO: when the input is RGB (not RGBA), we want add an alpha channel
# but keep the nodata value as matte within the map bounds.
# This seems to be possible with a clever use of
# gdalwarp/gdal_translate.
# http://www.gdal.org/frmt_gtiff.html
pod2usage(2) unless $#ARGV > 0;
my $index = pop;
my @mapset = map {{ filename => $_ }} @ARGV;
&debug( "Using mapset:", map {" - ".$_->{filename}} @mapset );
&debug( "Building index: $index" );
# Find the source and target SRS
# We also store the corders points and the affine transformation, to
# avoid to compute it again later on.
my $s_srs;
foreach my $map (@mapset) {
my $name = $map->{filename};
&debug ("Opening '$name'");
my $ds = Geo::GDAL::Open($name, 'ReadOnly') or exit 1;
my $stripped;
for (my $b=1; $b <= $ds->{RasterCount} && !$stripped; $b++) {
my ($bx, $by) = $ds->GetRasterBand($b)->GetBlockSize();
$stripped = 1 if ($bx == 1 and $by > 1) or ($bx > 1 and $by == 1);
}
warn "WARN: '$name' is stripped. Tiled structure is more efficient, especially for wrapping.\n"
if $stripped;
my $notband = $ds->GetMetadata('IMAGE_STRUCTURE')->{INTERLEAVE};
undef $notband unless defined $notband and $notband ne 'BAND';
warn "WARN: '$name' is '$notband'-interleaved; 'BAND' interleaving is recommended.\n"
if $notband;
if ($stripped or $notband) {
warn "WARN: To fix '$name', run the following command in a POSIX-compatible shell.\n";
warn "WARN: This is a lossless and usually size-preserving conversion.\n";
my $old = $name;
my ($new,$path,$suffix) = fileparse ($name, qr/\.[^.]*$/);
$new = File::Spec->catfile($path,$new.'_new'.$suffix);
my $driver = $ds->GetDriver()->{ShortName};
my %opts = %$gdal_opts;
my $compress = $ds->GetMetadata('IMAGE_STRUCTURE')->{COMPRESSION};
$opts{COMPRESS} = $compress if $compress;
warn "WARN: ".join (' ',
map { my $x = $_;
$x =~ s/"/\\"/;
$x = "\"$x\"" if $x =~ /[ ()';#{}*?~&|`!]/;
$x
}
( 'gdal_translate', '-of', $driver
, (map { ('-co', $_.'='.$opts{$_}) } (keys %opts))
, $old, $new
)
). "\n";
}
my $srs;
$map->{wkt} = $ds->GetProjection();
unless ($config{s_srs}) {
die "Error: Missing projection for '$name'.\n"
unless $map->{wkt} or $config{s_srs};
$map->{wkt} ||= $config{s_srs}->ExportToWkt();
$srs = Geo::OSR::SpatialReference::->new( $map->{wkt} );
if ($s_srs) {
die "Error: Projection for '$name' differs from the previous input tiles'\n"
unless $config{t_srs} or $s_srs->IsSame($srs);
}
else {
$s_srs = $srs;
}
}
&debug( "Using source SRS: ". ($config{s_srs} // $srs)->ExportToProj4() );
my $tx = Geo::OSR::CoordinateTransformation::->new(
$config{s_srs} // $srs,
$config{t_srs} // $config{s_srs} // $s_srs
);
die "Error: Could compute transformation between source and target SRS.\n"
unless $tx;
$map->{s_transform} = $ds->GetGeoTransform();
$map->{t_corners} = [ map {[ Geo::GDAL::ApplyGeoTransform($map->{s_transform}, @$_) ]}
( [ 0, 0]
, [ 0, $ds->{RasterYSize}-1 ]
, [ $ds->{RasterXSize}-1, 0 ]
, [ $ds->{RasterXSize}-1, $ds->{RasterYSize}-1 ]
)
];
$tx->TransformPoints( $map->{t_corners} );
die "Error: Could not transform point.\n"
if grep !/^[-+]?\d*\.?\d+$/, (map @$_, @{$map->{t_corners}});
{ local $_ = basename $name; eval $config{rename}; $map->{text} = $_; }
}
$config{t_srs} //= $config{s_srs};
&debug ("Using target SRS: ". $config{t_srs}->ExportToProj4()) if $config{t_srs};
# Working directory
my $tmpdir = File::Temp::tempdir( CLEANUP => 1 );
&debug ("Using working directory: '$tmpdir'.");
# Ensure the existence of the internal driver.
my $driver = 'GTiff';
my $driver_opts = { BIGTIFF => 'IF_NEEDED' };
my $driver_type = 'Byte';
die "Error: Unknown driver: '$driver'.\n"
unless Geo::GDAL::GetDriverByName($driver);
$driver_opts->{$_} //= $gdal_opts->{$_} for (keys %$gdal_opts);
map &expand_rgba($_), @mapset;
my $mosaic = &merge();
&annotate( $mosaic );
#######################################################################
# Print debug messages.
sub debug {
print STDERR (join '', map {"DEBUG: " .$_. "\n"} @_) if $config{debug};
}
# Create a temporary file. The file is created to defeat race
# conditions, but the file handle is closed right away.
sub tempfile {
my ($fh, $name) = File::Temp::tempfile(DIR => $tmpdir, UNLINK => 1, @_);
close $fh;
&debug( "Creating file: '$name'" );
return $name;
}
# Expand a dataset to RGBA. This code is nearly a perl clone of pct2rgb(1).
sub expand_rgba {
my $map = shift;
&debug ("Opening '$map->{filename}'");
my $src_ds = Geo::GDAL::Open($map->{filename}, 'ReadOnly') or exit 1;
return unless $src_ds->{RasterCount} == 1;
my $src_band = $src_ds->GetRasterBand(1);
my $ct = $src_band->GetRasterColorTable() or return;
&debug("Expansion to RGBA required.");
my $dst_nb = 4; # RGBA
my $src_nc = 256; # That's the best we can do, as we're using bytes
my $lookup = [ map '', (0 .. $src_nc-1) ];
$src_nc = $ct->GetCount() if $ct->GetCount() < $src_nc;
for
|