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Imager::Transform(3) User Contributed Perl Documentation Imager::Transform(3) NAME Imager::Transform - a library of register machine image transformations SYNOPSIS # get a list of transformations my @funcs = Imager::Transform->list; # create a transformation object my $tran = Imager::Transform->new($name); # describe it print $tran->describe; # a list of constant names my @constants = $tran->constants; # information about some of the constants my @info = $tran->constants(@constants); DESCRIPTION This module provides a library of transformations that use the Imager transform2() function. The aim is to provide a place to collect these transformations. At some point there might be an interface to add new functions, but there's not a whole lot of point to that. The interface is a little sparse as yet. METHODS my @names = Imager::Transform->list Returns a list of the transformations. my $desc = Imager::Transform->describe($name); my $desc = $tran->describe() Describes a transformation specified either by name (as a class method) or by reference (as an instance method). The class method returns undef if there is no such transformation. my $tran = Imager::Transform->new($name) Create a new transformation object. Returns undef if there is no such transformation. my @inputs = $tran->inputs; my $inputs = $tran->inputs; Returns a list of input image descriptions, or the number of them, depending on content. The list contains hash references, which current contain only one member, "desc", a description of the use of the input image. $tran->constants Returns a list of names of constants that can be set for the transformation. $tran->constants($name, $name, ...) Returns a hashref for each named constant, which contains the default in key "default" and a description in key "desc". my $out = $tran->transform(\%opts, \%constants, @imgs) Perform the image transformation. Returns the new image on success, or undef on failure, in which case you can use $tran->errstr to get an error message. $tran->errstr The error message, if any from the last image transformation. BUGS Needs more transformations. SEE ALSO Imager(3), transform.perl AUTHOR Tony Cook <tonyc@cpan.org> perl v5.32.1 2020-06-13 Imager::Transform(3)
NAME | SYNOPSIS | DESCRIPTION | METHODS | BUGS | SEE ALSO | AUTHOR
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