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Graph::colour(3)      User Contributed Perl Documentation     Graph::colour(3)

NAME
       GD::Graph::colour - Colour manipulation routines	for use	with GD::Graph

SYNOPSIS
       use GD::Graph::colour qw(:colours :lists	:files :convert);

DESCRIPTION
       The GD::Graph::colour package provides a	few routines to	work with
       colours.	The functionality of this package is mainly defined by what is
       needed, now and historically, by	the GD::Graph modules.

FUNCTIONS
   colour_list(	number of colours )
       Returns a list of number	of colours colour names	known to the package.
       Exported	with the :lists	tag.

   sorted_colour_list( number of colours )
       Returns a list of number	of colours colour names	known to the package,
       sorted by luminance or hue.  NB.	Right now it always sorts by
       luminance. Will add an option in	a later	stage to decide	sorting	method
       at run time.  Exported with the :lists tag.

   _rgb( colour	name )
       Returns a list of the RGB values	of colour name.	if the colour name is
       a string	of the form that is acceptable to the hex2rgb sub, then	the
       colour will be added to the list	dynamically.  Exported with the
       :colours	tag.

   _hue( R,G,B )
       Returns the hue of the colour with the specified	RGB values.  Exported
       with the	:colours tag.

   _luminance( R,G,B )
       Returns the luminance of	the colour with	the specified RGB values.
       Exported	with the :colours tag.

   add_colour(colourname => [$r, $g, $b]) or add_colour('#7fe310')
       Self-explanatory.  Exported with	the :colours tag.

   rgb2hex($red, $green, $blue)
   hex2rgb('#7fe310')
       These functions translate a list	of RGB values into a hexadecimal
       string, as is commonly used in HTML and the Image::Magick API, and vice
       versa.  Exported	with the :convert tag.

   read_rgb( file name )
       Reads in	colours	from a rgb file	as used	by the X11 system.

       Doing something like:

	   use GD::Graph::bars;
	   use GD::Graph::colour;

	   GD::Graph::colour::read_rgb("rgb.txt") or die "cannot read colours";

       Will allow you to use any colours defined in rgb.txt in your graph.
       Exported	with the :files	tag.

PREDEFINED COLOUR NAMES
       white, lgray, gray, dgray, black, lblue,	blue, dblue, gold, lyellow,
       yellow, dyellow,	lgreen,	green, dgreen, lred, red, dred,	lpurple,
       purple, dpurple,	lorange, orange, pink, dpink, marine, cyan, lbrown,
       dbrown.

AUTHOR
       Martien Verbruggen <mgjv@tradingpost.com.au>

   Copyright
       GIFgraph: Copyright (c) 1995-1999 Martien Verbruggen.  Chart::PNGgraph:
       Copyright (c) 1999 Steve	Bonds.	GD::Graph: Copyright (c) 1999 Martien
       Verbruggen.

       All rights reserved. This package is free software; you can
       redistribute it and/or modify it	under the same terms as	Perl itself.

SEE ALSO
       GD::Graph, GD::Graph::FAQ

perl v5.32.1			  2013-06-22		      Graph::colour(3)

NAME | SYNOPSIS | DESCRIPTION | FUNCTIONS | PREDEFINED COLOUR NAMES | AUTHOR | SEE ALSO

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