Convert::Color::RGB16 - a color value represented as red/green/blue in 16-bit integers
Convert::Color::RGB16
Directly:
use Convert::Color::RGB16; my $red = Convert::Color::RGB16->new( 65535, 0, 0 ); # Can also parse strings my $pink = Convert::Color::RGB16->new( '65535,49152,49152' ); # or $pink = Convert::Color::RGB16->new( 'ffffc000c000' );
Via Convert::Color:
use Convert::Color; my $cyan = Convert::Color->new( 'rgb16:0,65535,65535' );
Objects in this class represent a color in RGB space, as a set of three integer values in the range 0 to 65535; i.e. as 16 bits.
For representations using floating point values, see Convert::Color::RGB. For representations using 8-bit integers, see Convert::Color::RGB8.
Returns a new object to represent the set of values given. These values should be integers between 0 and 65535. Values outside of this range will be clamped.
Parses $string for values, and construct a new object similar to the above three-argument form. The string should be in the form
$string
red,green,blue
containing the three integer values in decimal notation. It can also be given in the form of a hex encoded string, such as would be returned by the rgb16_hex method:
rgb16_hex
rrrrggggbbbb
Accessors for the three components of the color.
Returns the individual red, green and blue color components of the color value in RGB16 space.
Returns a string representation of the color components in the RGB16 space, in a convenient RRRRGGGGBBBB hex string.
RRRRGGGGBBBB
Return a new color which is a blended combination of the two passed into it. The optional $alpha parameter defines the mix ratio between the two colors, defaulting to 0.5 if not defined. Values closer to 0 will blend more of $color, closer to 1 will blend more of $other.
$alpha
$color
$other
Similar to alpha_blend but works with integer arithmetic. $alpha should be an integer in the range 0 to 65535.
alpha_blend
Return a measure of the distance between the two colors. This is the unweighted Euclidean distance of the three color components. Two identical colors will have a measure of 0, pure black and pure white have a distance of 1, and all others will lie somewhere inbetween.
Return a measure of the distance between the two colors. This is the sum of the squares of the differences of each of the color components. This is part of the value used to calculate dst_rgb16, but since it involves no square root it will be cheaper to calculate, for use in cases where only the relative values matter, such as when picking the "best match" out of a set of colors. It ranges between 0 for identical colours and 3*(65535^2) for the distance between pure black and pure white.
dst_rgb16
Convert::Color - color space conversions
Paul Evans <leonerd@leonerd.org.uk>
To install Convert::Color, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Convert::Color
CPAN shell
perl -MCPAN -e shell install Convert::Color
For more information on module installation, please visit the detailed CPAN module installation guide.