Image::Pbm - Load, create, manipulate and save pbm image files.
use Image::Pbm(); my $i = Image::Pbm->new(-width => 50, -height => 25 ); $i->line ( 2, 2, 22, 22 => 1 ); $i->rectangle( 4, 4, 40, 20 => 1 ); $i->ellipse ( 6, 6, 30, 15 => 1 ); $i->xybit ( 42, 22 => 1 ); print $i->as_string; $i->save('test.pbm'); $i = Image::Pbm->new(-file,'test.pbm');
This module provides basic load, manipulate and save functionality for the pbm file format. It inherits from
Image::Xbm which provides additional functionality.
Imagine, we have to create self-contained web pages (with embedded images). Most browsers understand the xbm image format, but generating xbm files requires a certain effort (or a full fledged graphics software package). On the other hand, generating pbm files is easy. Indeed, it's more likely that you use your favorite text editor instead of Image::Pbm for that task. Reading pbm files is slightly more difficult. That's where the Image::[PX]bm modules come into play:
use Image::Pbm(); Image::Pbm->new(-file,'test.pbm') ->new_from_image('Image::Xbm') ->save('test.xbm');
Once we have xbm files, we can serve these images onto the Internet. To embed these images into a web page, we can use the "data" URL scheme:
which requires the standard %xx hex encoding of URLs:
use URI::Escape(); my $data = URI::Escape::uri_escape( $xbm ); print qq(<img src="data:image/x-xbitmap,$data">);
This works with Mozilla and Opera. For Internet Explorer, we can use the following workaround:
This works with Mozilla too.
Contact Mark Summerfield because the inheritance hierarchy
Image::Pbm <: Image::Xbm <: Image::Base
is suboptimal and should look like
Image::Xbm <: Image::Bitmap <: Image::Base Image::Pbm <:
Steffen Goeldner <email@example.com>
Copyright (c) 2004, 2012 Steffen Goeldner. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.