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
Returns a list of the transformations. 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. Create a new transformation object. Returns undef if there is no such transformation. Returns a list of input image descriptions, or the number of them, depending on content.

The list contains hashrefs, which current contain only one member, desc, a description of the use of the input image. 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. The error message, if any from the last image transformation.

BUGS
Needs more transformations.

SEE ALSO
Imager(3), transform.perl