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相关代码

				package Image::Info::XBM;
				$VERSION = '1.03';
				use strict;
				use Image::Xbm;
				
				sub process_file{
				    my($info, $source, $opts) = @_;
				    my(@comments, @warnings, $i, $imgdata);
				
				    *Image::Xbm::carp  = sub { push @warnings, @_; };
				    *Image::Xbm::croak = sub { $info->push_info(0, "error", @_); };
				    if( $Image::Xbm::Version cmp '1.07' < 1){
					push @warnings, "This version of Image::Xbm does not support filehandles or scalar references";
					$source = $info->get_info(0, "FileName");
				    }
				    if( $info->get_info(0, "error") ){
					return; }
				
				    $i = Image::Xbm->new(-file, $source);
				    $info->push_info(0, "color_type" => "Grey");
				    $info->push_info(0, "file_ext" => "xbm");
				    $info->push_info(0, "file_media_type" => "image/x-xbitmap");
				    $info->push_info(0, "height", $i->get(-height));
				    $info->push_info(0, "resolution", "1/1");
				    $info->push_info(0, "width", $i->get(-width));
				    $info->push_info(0, "BitsPerSample" => 1);
				    $info->push_info(0, "SamplesPerPixel", 1);
				
				    $info->push_info(0, "ColorTableSize" => 2 );
				    if(  $opts->{L1D_Histogram} ){
					#Do Histogram
					$imgdata = $i->as_binstring();
					$info->push_info(0, "L1D_Histogram", [$imgdata =~ tr/0//d,
									      $imgdata =~ tr/1//d ]);
				    }
				    $info->push_info(0, "HotSpotX" => $i->get(-hotx) );
				    $info->push_info(0, "HotSpotY" => $i->get(-hoty) );
				
				    for (@comments) {
					$info->push_info(0, "Comment", $_);
				    }
				    
				    for (@warnings) {
					$info->push_info(0, "Warn", $_);
				    }
				}
				1;
				__END__
				
				=head1 NAME
				
				Image::Info::XBM - XBM support for Image::Info
				
				=head1 SYNOPSIS
				
				 use Image::Info qw(image_info dim);
				
				 my $info = image_info("image.xbm");
				 if (my $error = $info->{error}) {
				     die "Can't parse image info: $error\n";
				 }
				 my $color = $info->{color_type};
				
				 my($w, $h) = dim($info);
				
				=head1 DESCRIPTION
				
				This modules supplies the standard key names
				except for Compression, Gamma, Interlace, LastModificationTime, as well as:
				
				=over
				
				=item HotSpotX
				
				The x-coord of the image's hotspot.
				Set to -1 if there is no hotspot.
				
				=item HotSpotY
				
				The y-coord of the image's hotspot.
				Set to -1 if there is no hotspot.
				
				=item L1D_Histogram
				
				Reference to an array representing a one dimensioanl luminance
				histogram. This key is only present if C is invoked
				as C. The range is from 0 to 1.
				
				=back
				
				=item FILES
				
				This module requires L
				
				=head1 SEE ALSO
				
				L, L
				
				=head1 NOTES
				
				For more information about XBM see:
				
				 http://www.dcs.ed.ac.uk/home/mxr/gfx/2d/XBM.txt
				
				=head1 AUTHOR
				
				Jerrad Pierce /
				
				This library is free software; you can redistribute it and/or
				modify it under the same terms as Perl itself.
				
				=cut
				
				=begin register
				
				MAGIC: /^#define\s+/
				
				See L for details.
				
				=end register
				
				=cut
							

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