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#!/usr/bin/env perl

###############################################################################
#
# This file copyright (c) 2010-2012 by Randy J. Ray, all rights reserved
#
# Copying and distribution are permitted under the terms of the Artistic
# License 2.0 (http://www.opensource.org/licenses/artistic-license-2.0.php) or
# the GNU LGPL (http://www.opensource.org/licenses/lgpl-2.1.php).
#
###############################################################################
#
# No-brainer to size an image supplied on the command-line. All the real
# work is done in Image::Size.

use strict;
use warnings;
use vars qw($VERSION);

use File::Basename 'basename';
use Getopt::Std;

use Image::Size qw(:all);

$VERSION = '1.001';
$VERSION = eval $VERSION; ## no critic(ProhibitStringyEval)

my $cmd = basename $0;
my ($rtn, %opts);

getopts('hraf:', \%opts);

# Usage reporting: if -h, or no @ARGV, or more than one of the rest...
if ($opts{h} || (! @ARGV) ||
    (($opts{a} && $opts{r}) || ($opts{a} && $opts{f}) ||
     ($opts{r} && $opts{f})))
{
    die "Usage: $cmd [ -r | -a | -f fmt ] file ...\n";
}

$rtn = \&return_html;
$opts{a} &&
    ($rtn = \&return_attr);
$opts{r} &&
    ($rtn = \&return_imgsize);
$opts{f} &&
    ($rtn = \&return_fmt);

if (@ARGV > 1)
{
    foreach (@ARGV)
    {
        printf "$_: %s\n", $rtn->($_);
    }
}
else
{
    printf "%s\n", $rtn->($ARGV[0]);
}

exit 0;

sub return_html
{
    my $file = shift;

my ($width, $height, $err) = imgsize($file);

return (defined $width) ?
        qq(width="$width" height="$height") : "error: $err";
}

sub return_attr
{
    my $file = shift;

my ($width, $height, $err) = imgsize($file);

return (defined $width) ?
        "(-width => $width, -height => $height)" : "error: $err";
}

sub return_imgsize
{
    my $file = shift;

my ($width, $height, $err) = imgsize($file);

return (defined $width) ? "$width $height" : "error: $err";
}

sub return_fmt
{
    my $file = shift;

my ($width, $height, $err) = imgsize($file);

return (defined $width) ?
        sprintf($opts{f}, $width, $height, $err) : "error: $err";
}

__END__

=head1 NAME

imgsize - read the dimensions of an image in several popular formats

=head1 USAGE

imgsize [ -r | -a | -f fmt ] file [ file ... ]

=head1 DESCRIPTION

No-brainer to size an image supplied on the command-line. All the real
work is done in L<Image::Size|Image::Size>.

=head1 REQUIRED ARGUMENTS

B<imgsize> expects file names on the command-line. If more than one file is
provided, the file name will be included in the output:

% imgsize dot.gif
    width="16" height="16"
    % imgsize dot.gif dash.gif
    dot.gif: width="16" height="16"
    dash.gif: width="32" height="8"

=head1 OPTIONS

By default, the width and height are returned as attributes for an IMG tag in
HTML, essentially C<width="40" height="30"> or similar. The following options
may be used to return alternate formats (all report width first, then height):

=over

=item C<-r>

Return "raw" format data. Just the numbers separated by a single space.

=item C<-a>

Return a Perl-style list of attributes suitable for passing to the C<img()>
method of the CGI module (see L<CGI|CGI>).

=item C<-f> B<fmt>

Pass the string specified in I<fmt> to C<sprintf> and thus use it to format
the results to your taste. C<sprintf> will be passed two numbers, so any
other formatting directives will be lost. The numbers are passed as width
first, then height.

=back

=head1 EXIT STATUS

B<imgsize> always exits

=head1 BUGS

Please report any bugs or feature requests to
C<bug-image-size at rt.cpan.org>, or through the web interface at
L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Image-Size>. I will be
notified, and then you'll automatically be notified of progress on
your bug as I make changes.

=head1 SUPPORT

=over 4

=item * RT: CPAN's request tracker

L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Image-Size>

=item * AnnoCPAN: Annotated CPAN documentation

L<http://annocpan.org/dist/Image-Size>

=item * CPAN Ratings

L<http://cpanratings.perl.org/d/Image-Size>

=item * Search CPAN

L<http://search.cpan.org/dist/Image-Size>

=item * Project page on GitHub

L<http://github.com/rjray/image-size>

=back

=head1 LICENSE AND COPYRIGHT

Copying and distribution are permitted under the terms of the Artistic
License 2.0 (L<http://www.opensource.org/licenses/artistic-license-2.0.php>) or
the GNU LGPL 2.1 (L<http://www.opensource.org/licenses/lgpl-2.1.php>).

=head1 SEE ALSO

L<Image::Size|Image::Size>

=head1 AUTHOR

Randy J. Ray C<< <rjray@blackperl.com> >>.