NAME Number::RGB - Manipulate RGB Tuples SYNOPSIS use Number::RGB; my $white :RGB(255); my $black :RGB(0); my $gray = $black + (($white - $black) / 2); my @rgb = @{ $white->rgb }; my $hex = $black->hex; my $blue = Number::RGB->new(rgb => [0,0,255]); my $green = Number::RGB->new(hex => '#00FF00'); my $red :RGB(255,0,0); my $purple = $blue + $green; my $yellow = $red + $green; DESCRIPTION This module creates RGB tuple objects and overloads their operators to make RGB math easier. An attribute is also exported to the caller to make construction shorter. Methods "new()" my $red = Number::RGB->new(rgb => [255,0,0]) my $blue = Number::RGB->new(hex => '#0000FF'); my $black = Number::RGB->new(rgb_number => 0); This constructor accepts named parameters. One of three parameters are required. "rgb" is a list reference containing three intergers within the range of 0..255. In order, each interger represents *red*, *green*, and *blue*. "hex" is a hexidecimal representation of an RGB tuple commonly used in Cascading Style Sheets. The format begins with an optional hash ("#") and follows with three groups of hexidecimal numbers represending *red*, *green*, and *blue* in that order. "rgb_number" is a single integer which represents all primary colors. This is shorthand to create *white*, *black*, and all shades of *gray*. This method throws and exception on error, which should be caught with "eval". "r()" Accessor and mutator for the *red* value. "g()" Accessor and mutator for the *green* value. "b()" Accessor and mutator for the *blue* value. "rgb()" Returns a list reference containing three elements. In order they represent *red*, *green*, and *blue*. "hex()" Returns a hexidecimal represention of the tuple conforming to the format used in Cascading Style Sheets. "hex_uc()" Returns the same thing as "hex()", but any hexidecimal numbers that include 'A'..'F' will be uppercased. "as_string()" Returns a string representation of the tuple. For example, *black* would be the string "255,255,255". "new_from_guess()" my $color = Number::RGB->new_from_guess(input()); This constructor tries to guess the format being used and returns a tuple object. If it can't guess, an exception will be thrown. Attributes ":RGB()" my $red :RGB(255,0,0); my $blue :RGB(#0000FF); my $white :RGB(0); This attribute is exported to the caller and provides a shorthand wrapper around "new_from_guess()". AUTHOR Casey West, . COPYRIGHT Copyright (c) 2004 Casey West. All rights reserved. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.