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package Imager::Search::Image; |
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=pod |
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=head1 NAME |
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Imager::Search::Image - Generic interface for a searchable image |
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=head1 DESCRIPTION |
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L is an abstract base class for objects that |
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implement an image to be searched. |
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=head1 METHODS |
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=cut |
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use 5.006; |
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use strict; |
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use Params::Util qw{ _IDENTIFIER _POSINT _INSTANCE _DRIVER }; |
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use vars qw{$VERSION}; |
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BEGIN { |
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$VERSION = '1.01'; |
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} |
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use Object::Tiny::XS qw{ |
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name |
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driver |
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file |
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image |
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height |
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width |
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string |
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}; |
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###################################################################### |
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# Constructor and Accessors |
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sub new { |
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my $class = shift; |
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my $self = bless { @_ }, $class; |
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# Check the driver |
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if ( _IDENTIFIER($self->driver) ) { |
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$self->{driver} = "Imager::Search::Driver::" . $self->driver; |
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} |
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if ( _DRIVER($self->driver, 'Imager::Search::Driver') ) { |
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$self->{driver} = $self->driver->new; |
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} |
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unless ( _INSTANCE($self->driver, 'Imager::Search::Driver') ) { |
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Carp::croak("Did not provide a valid driver"); |
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} |
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if ( defined $self->file and not defined $self->image ) { |
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# Load the image from a file |
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$self->{image} = Imager->new; |
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$self->{image}->read( file => $self->file ); |
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} |
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if ( defined $self->image ) { |
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unless( _INSTANCE($self->image, 'Imager') ) { |
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Carp::croak("Did not provide a valid image"); |
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} |
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$self->{height} = $self->image->getheight; |
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$self->{width} = $self->image->getwidth; |
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$self->{string} = $self->driver->image_string($self->image); |
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} |
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unless ( _POSINT($self->height) ) { |
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Carp::croak("Invalid or missing image height"); |
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} |
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unless ( _POSINT($self->width) ) { |
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Carp::croak("Invalid or missing image width"); |
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} |
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return $self; |
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} |
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##################################################################### |
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# Search Methods |
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=pod |
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90
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=head2 find |
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The C method compiles the search and target images in memory, and |
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executes a single search, returning the position of the first match as a |
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L object. |
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96
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=cut |
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98
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sub find { |
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my $self = shift; |
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my $pattern = _INSTANCE(shift, 'Imager::Search::Pattern'); |
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unless ( $pattern ) { |
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die "Did not pass a Pattern object to find"; |
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} |
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105
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# Run the search |
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my @match = (); |
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my $string = $self->string; |
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my $regexp = $pattern->regexp( $self ); |
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3
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while ( scalar $$string =~ /$regexp/g ) { |
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my $p = $-[0]; |
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push @match, $self->driver->match_object( $self, $pattern, $p ); |
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pos $$string = $p + 1; |
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} |
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3
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return @match; |
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} |
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sub find_any { |
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my $self = shift; |
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my $pattern = _INSTANCE(shift, 'Imager::Search::Pattern'); |
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unless ( $pattern ) { |
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die "Did not pass a Pattern object to find"; |
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} |
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# Run the search |
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my $string = $self->string; |
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my $regexp = $pattern->regexp( $self ); |
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while ( scalar $$string =~ /$regexp/gs ) { |
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my $p = $-[0]; |
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if ( defined $self->driver->match_object( $self, $pattern, $p ) ) { |
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return 1; |
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} |
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0
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pos $$string = $p + 1; |
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} |
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0
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return ''; |
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} |
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1; |
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140
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=pod |
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142
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=head1 SUPPORT |
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144
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See the SUPPORT section of the main L module. |
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146
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=head1 AUTHOR |
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148
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Adam Kennedy Eadamk@cpan.orgE |
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150
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=head1 COPYRIGHT |
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152
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Copyright 2007 - 2011 Adam Kennedy. |
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154
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This program is free software; you can redistribute |
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it and/or modify it under the same terms as Perl itself. |
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157
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The full text of the license can be found in the |
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LICENSE file included with this module. |
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=cut |