GD::Graph::colour GD::Graph::colour contains colour manipulation routines for use with GD::Graph.
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colour manipulation manipulation routines colour manipulation

GD::Graph::colour Description

GD::Graph::colour contains colour manipulation routines for use with GD::Graph. GD::Graph::colour contains colour manipulation routines for use with GD::Graph.SYNOPSISuse GD::Graph::colour qw(:colours :lists :files :convert);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.FUNCTIONScolour_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 => ) 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. Requirements: · Perl

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