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Man Pages


Manual Reference Pages  -  GRAPHICS::COLOR::RGB (3)

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NAME

Graphics::Color::RGB - RGB color model

CONTENTS

VERSION

version 0.31

SYNOPSIS



    use Graphics::Color::RGB;

    my $color = Graphics::Color::RGB->new({
        red     => 1,
        blue    => .31,
        green   => .25,
    });



DESCRIPTION

Graphics::Color::RGB represents a Color in the sRGB color space. Individual color channels are expressed as decimal values from 0 to 1, 0 being a lack of that color (or opaque in the case of alpha) and 1 being full color (or transparent in the case of alpha). If no options are provided then new instance of RGB are opaque white, (that is equivalent to red => 1, green => 1, blue => 1, alpha => 1).

Convenience methods are supplied to convert to various string values.

ATTRIBUTES

    red

    r

Set/Get the red component of this Color. Aliased to ’r’ as well.

    green

    g

Set/Get the green component of this Color. Aliased to ’g’ as well.

    blue

    b

Set/Get the blue component of this Color. Aliased to ’b’ as well.

    alpha

    a

Set/Get the alpha component of this Color. Aliased to ’a’ as well.

    name

Get the name of this color. Only valid if the color was created by name.

METHODS

    as_string

Get a string version of this Color in the form of RED,GREEN,BLUE,ALPHA

    as_integer_string

Return an integer formatted value for this color. This format is suitable for CSS RGBA values.

    as_css_hex

Return a hex formatted value with a prepended ’#’ for use in CSS and HTML.

    as_hex_string ( [$prepend] )

Return a hex formatted value for this color. The output ignores the alpha channel because, per the W3C, there is no hexadecimal notiation for an RGBA value. Optionally allows you to include a string that will be prepended. This is a common way to add the #.

    as_percent_string

Return a percent formatted value for this color. This format is suitable for CSS RGBA values.

    as_array

Get the RGB values as an array.

    as_array_with_alpha

Get the RGBA values as an array

    equal_to

Compares this color to the provided one. Returns 1 if true, else 0;

    not_equal_to

The opposite of equal_to.

    from_color_library ($color_id)

Attempts to retrieve the specified color-id using Color::Library. The result is then converted into a Graphics::Color::RGB object.

    from_hex_string($hex)

Attempts to create a Graphics::Color::RGB object from a hex string. Works with or without the leading # and with either 3 or 6 character hex strings.

    to_hsl

Creates this RGB color in HSL space. Returns a Graphics::Color::HSL object.

    to_hsv

Creates this RGB color in HSV space. Returns a Graphics::Color::HSV object.

AUTHOR

Cory G Watson <gphat@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2014 by Cold Hard Code, LLC.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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perl v5.20.3 GRAPHICS::COLOR::RGB (3) 2014-12-09

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