Imager::Color::Float - Rough floating point sample color handling
$color = Imager::Color->new($red, $green, $blue); $color = Imager::Color->new($red, $green, $blue, $alpha); $color = Imager::Color->new("#C0C0FF"); # html color specification $color->set($red, $green, $blue); $color->set($red, $green, $blue, $alpha); $color->set("#C0C0FF"); # html color specification ($red, $green, $blue, $alpha) = $color->rgba(); @hsv = $color->hsv(); # not implemented but proposed $color->info();
This module handles creating color objects used by Imager. The idea is that in the future this module will be able to handle color space calculations as well.
A floating point Imager color consists of up to four components, each in the range 0.0 to 1.0. Unfortunately the meaning of the components can change depending on the type of image you're dealing with:
for 3 or 4 channel images the color components are red, green, blue, alpha.
for 1 or 2 channel images the color components are gray, alpha, with the other two components ignored.
An alpha value of zero is fully transparent, an alpha value of 1.0 is fully opaque.
This creates a color object to pass to functions that need a color argument.
This changes an already defined color. Note that this does not affect any places where the color has been used previously.
This returns the red, green, blue and alpha channels of the color the object contains.
Calling info merely dumps the relevant color to the log.
Arnar M. Hrafnkelsson, addi@umich.edu And a great deal of help from others - see the README for a complete list.
README
Imager(3), Imager::Color.
http://imager.perl.org/
To install Imager, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Imager
CPAN shell
perl -MCPAN -e shell install Imager
For more information on module installation, please visit the detailed CPAN module installation guide.