NAME¶
Imager::Color::Float - Rough floating point sample color handling
SYNOPSIS¶
$color = Imager::Color->new($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();
DESCRIPTION¶
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.
METHODS¶
- new
- This creates a color object to pass to functions that need a color
argument.
- set
- This changes an already defined color. Note that this does not affect any
places where the color has been used previously.
- rgba()
- This returns the red, green, blue and alpha channels of the color the
object contains.
- info
- Calling info merely dumps the relevant color to the log.
AUTHOR¶
Arnar M. Hrafnkelsson, addi@umich.edu And a great deal of help from others - see
the "README" for a complete list.
SEE ALSO¶
Imager(3), Imager::Color.
http://imager.perl.org/