/usr/share/perl5/OpenGL/Image.pm is in libopengl-image-perl 1.03-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# OpenGL::Image - Copyright 2007 Graphcomp - ALL RIGHTS RESERVED
# Author: Bob "grafman" Free - grafman@graphcomp.com
#
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
############################################################
### SEE DOCS IN Image.pod
package OpenGL::Image;
require Exporter;
use strict;
use warnings;
use Carp;
use vars qw($VERSION @ISA);
$VERSION = '1.03';
@ISA = qw(Exporter);
# Return hashref of installed imaging engines
# Use OpenGL/Image/Engines.lst if exists
sub GetEngines
{
my $dir = __FILE__;
return if ($dir !~ s|\.pm$||);
my @engines;
# Use engine list if exists
my $list = "$dir/Engines.lst";
if (open(LIST,$list))
{
foreach my $engine (<LIST>)
{
$engine =~ s|[\r\n]+||g;
next if (!-e "$dir/$engine.pm");
push(@engines,$engine);
}
close(LIST);
}
# Otherwise grab OpenGL/Image modules
elsif (opendir(DIR,$dir))
{
foreach my $engine (readdir(DIR))
{
next if ($engine !~ s|\.pm$||);
push(@engines,$engine);
}
closedir(DIR);
# Targa engine gets priority when no Engines.lst exists
@engines = ((grep {$_ eq 'Targa'} @engines),
grep {$_ ne 'Targa'} @engines);
}
return if (!@engines);
my @info;
my $engines = {};
my $priority = 1;
foreach my $engine (@engines)
{
next if ($engine eq 'Common');
my $info = HasEngine($engine);
next if (!$info);
if (wantarray)
{
push(@info,$info);
}
else
{
$info->{priority} = $priority++;
$engines->{$engine} = $info;
}
}
return wantarray ? @info : $engines;
}
# Check for engine availability; returns installed version
sub HasEngine
{
my($engine,$min_ver,$max_ver) = @_;
return if (!$engine);
my($version,$desc);
my $module = GetEngineModule($engine);
# Redirect Perl errors if module can't be loaded
open(OLD_STDERR, ">&STDERR");
close(STDERR);
my $exec = qq
{
use $module;
\$version = $module\::EngineVersion();
\$desc = $module\::EngineDescription();
};
eval($exec);
# Restore STDERR
open(STDERR, ">&OLD_STDERR");
close(OLD_STDERR);
return if (!$version);
return if ($min_ver && $version lt $min_ver);
return if ($max_ver && $version gt $max_ver);
my $info = {};
$info->{name} = $engine;
$info->{module} = $module;
$info->{version} = $version;
$info->{description} = $desc;
return $info;
}
# Get module name for engine
sub GetEngineModule
{
my($engine) = @_;
return if (!$engine);
return __PACKAGE__."::$engine";
}
# Constructor wrapper for imaging engine
sub new
{
my $this = shift;
my $class = ref($this) || $this;
my $self = {};
bless($self,$class);
my %params = @_;
my $engine = $params{engine};
if ($engine)
{
return if ($engine eq 'Common');
return NewEngine($engine,%params);
}
my @engines = GetEngines();
foreach my $info (@engines)
{
my $obj = NewEngine($info->{name},%params);
return $obj if ($obj);
}
return undef;
}
# Instantiate engine
sub NewEngine
{
my($engine,%params) = @_;
return undef if (!$engine);
my $obj;
my $module = GetEngineModule($engine);
my $exec = qq
{
use $module;
\$obj = new $module\(\%params);
};
eval($exec);
return $obj;
}
1;
__END__
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