package Crypt::Image::Util;
$Crypt::Image::Util::VERSION = '0.05';
=head1 NAME
Crypt::Image::Util - Helper for Crypt::Image module.
=head1 VERSION
Version 0.05
=cut
use 5.006;
use Data::Dumper;
use autodie;
use Math::Random;
use Crypt::Image::Axis;
=head1 DESCRIPTION
Utility module for Crypt::Image. Methods can be accessed directly.
=head1 METHODS
=head2 cloneImage()
It clone the given image (object of type GD::Image) and returns the clone of type
GD::Image.
=cut
sub cloneImage {
my ($image) = @_;
return $image->clone;
}
=head2 saveImage()
Saves the given image data as given file name of the given type. The parameters
are listed below in sequence:
=over 3
=item * Filename with the complete path.
=item * Object of type GD::Image for the image.
=item * Type of the given image.
=back
=cut
sub saveImage {
my ($file, $image, $type) = @_;
open(IMAGE, ">$file");
binmode IMAGE;
print IMAGE $image->png if $type =~ /png/i;
print IMAGE $image->gif if $type =~ /gif/i;
print IMAGE $image->jpeg if $type =~ /jpg/i;
close(IMAGE);
}
=head2 moveDown()
Moves the given pixel down by given number.
=cut
sub moveDown {
my ($this, $by) = @_;
($this < 128)?($this += $by):($this -= $by);
return $this;
}
=head2 moveUp()
Moves the given pixel up by given number.
=cut
sub moveUp {
my ($this, $by) = @_;
($this >= 128)?($this -= $by):($this += $by);
return $this;
}
=head2 getColor()
Returns the color index for the given R, G and B.
=cut
sub getColor {
my ($r, $g, $b) = @_;
my $image = GD::Image->new();
return $image->colorAllocate($r, $g, $b);
}
=head2 splitInTwo()
It splits the given point into X, Y coordinates and returns an object of type
Crypt::Image::Axis.
=cut
sub splitInTwo {
my ($a) = @_;
my $r = int(random_uniform() * $a);
$a -= $r;
return Crypt::Image::Axis->new('x' => $a, 'y' => $r);
}
=head2 splitInThree()
It splits the given point into X, Y, Z coordinates and returns an object of type
L<Crypt::Image::Axis>.
=cut
sub splitInThree {
my ($a) = @_;
my $z = 0;
my $r = int(random_uniform() * $a);
$a -= $r;
if ($a > $r) {
$z = int(random_uniform() * $a);
$a -= $z;
}
else {
$z = int(random_uniform() * $r);
$r -= $z;
}
return Crypt::Image::Axis->new('x' => $a, 'y' => $r, 'z' => $z);
}
=head2 differenceInAxis()
It returns the absolute difference in the R, G and B of the given key and cloned
images at X and Y coordinates. The parameters are listed below in sequence:
=over 4
=item * Object of type GD::Image for key image.
=item * Object of type GD::Image for new image.
=item * X coordinate.
=item * Y coordinate.
=back
=cut
sub differenceInAxis {
my ($k, $c, $x, $y) = @_;
my ($k_r, $k_g, $k_b) = Crypt::Image::Util::getPixelColorRGB($k, $x, $y);
my ($c_r, $c_g, $c_b) = Crypt::Image::Util::getPixelColorRGB($c, $x, $y);
return (abs($k_r-$c_r), abs($k_g-$c_g), abs($k_b-$c_b));
}
=head2 getPixelColorRGB()
Returns the R,G,B of the given image at the given X,Y coordinates. The parameters
are listed below in sequence:
=over 3
=item * Object of type GD::Image for the image.
=item * X coordinate.
=item * Y coordinate.
=back
=cut
sub getPixelColorRGB {
my ($image, $x, $y) = @_;
my $index = $image->getPixel($x, $y);
my ($r, $g, $b) = $image->rgb($index);
return ($r, $g, $b);
}
=head1 AUTHOR
Mohammad S Anwar, C<< <mohammad.anwar at yahoo.com> >>
Mohammad S Anwar, C<< <mohammad.anwar at yahoo.com> >>
=head1 REPOSITORY
L<https://github.com/Manwar/Crypt-Image>
=head1 BUGS
Please report any bugs / feature requests to C<bug-crypt-image at rt.cpan.org> or
through the the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Crypt-Image>.
I will be notified, and then you'll automatically be notified of progress on your
bug as I make changes.
=head1 SUPPORT
You can find documentation for this module with the perldoc command.
perldoc Crypt::Image::Util
You can also look for information at:
=over 4
=item * RT: CPAN's request tracker
L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Crypt-Image>
=item * AnnoCPAN: Annotated CPAN documentation
L<http://annocpan.org/dist/Crypt-Image>
=item * CPAN Ratings
L<http://cpanratings.perl.org/d/Crypt-Image>
=item * Search CPAN
L<http://search.cpan.org/dist/Crypt-Image/>
=back
=head1 LICENSE AND COPYRIGHT
Copyright 2011 - 2014 Mohammad S Anwar.
This program is free software; you can redistribute it and/or modify it under
the terms of the the Artistic License (2.0). You may obtain a copy of the full
license at:
L<http://www.perlfoundation.org/artistic_license_2_0>
Any use, modification, and distribution of the Standard or Modified Versions is
governed by this Artistic License.By using, modifying or distributing the Package,
you accept this license. Do not use, modify, or distribute the Package, if you do
not accept this license.
If your Modified Version has been derived from a Modified Version made by someone
other than you,you are nevertheless required to ensure that your Modified Version
complies with the requirements of this license.
This license does not grant you the right to use any trademark, service mark,
tradename, or logo of the Copyright Holder.
This license includes the non-exclusive, worldwide, free-of-charge patent license
to make, have made, use, offer to sell, sell, import and otherwise transfer the
Package with respect to any patent claims licensable by the Copyright Holder that
are necessarily infringed by the Package. If you institute patent litigation
(including a cross-claim or counterclaim) against any party alleging that the
Package constitutes direct or contributory patent infringement,then this Artistic
License to you shall terminate on the date that such litigation is filed.
Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND
CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. THE IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS
REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE
OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
=cut
1; # End of Crypt::Image::Util