org.pepsoft.util

Class ColourUtils

java.lang.Object

org.pepsoft.util.ColourUtils

public final class ColourUtils
extends Object

Utility methods for working with int 0xrrggbb encoded colour values.

Method Summary

Modifier and Type	Method and Description
static boolean	isGreyScale(int colour)
static int	mix(int colour1, int colour2) Mix two colours by mixing their red, green and blue components exactly equally.
static int	mix(int colour1, int colour2, int alpha) Mix two colours by mixing their red, green and blue components according to an alpha value between 0 and 256 (inclusive), where an alpha of 0 results in just colour1 and 256 in just colour2.
static int	multiply(int colour, int amount) Multiplies each of component of colour with amount and divides the result by 256.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

mix

public static int mix(int colour1,
                      int colour2)

Mix two colours by mixing their red, green and blue components exactly equally. This is a convenience method for calling mix(colour1, colour2, 128).

mix

public static int mix(int colour1,
                      int colour2,
                      int alpha)

Mix two colours by mixing their red, green and blue components according to an alpha value between 0 and 256 (inclusive), where an alpha of 0 results in just colour1 and 256 in just colour2.

multiply

public static int multiply(int colour,
                           int amount)

Multiplies each of component of colour with amount and divides the result by 256.

Parameters:

colour - The RGB colour to multiply.

amount - The amount to multiply each colour band with, where 256 leaves the colour unchanged.

Returns:

The multiplied colour.

isGreyScale

public static boolean isGreyScale(int colour)