mikera.image

Class Colours

java.lang.Object

mikera.image.Colours

public class Colours
extends Object

Class providing static methods for manipulation of colour values

Author:

Mike

Field Summary

Fields

Modifier and Type	Field and Description
static int	ALPHA_MASK
static int	BLUE_MASK
static int	BYTE_MASK
static int	GREEN_MASK
static int	RED_MASK
static int	RGB_MASK

Constructor Summary

Constructors

Constructor and Description
Colours()

Method Summary

Methods

Modifier and Type	Method and Description
static int	fromDouble3(double[] col, int offset)
static int	fromFloat3(float[] col, int offset)
static int	fromFloat4(float[] col, int offset) Converts an array of floats to an ARGB value
static int	getAlpha(int argb) Gets the alpha value of an ARGB colour int
static int	getARGB(int rgb, int alpha)
static int	getARGB(int r, int g, int b)
static int	getARGB(int r, int g, int b, int a)
static int	getARGBClamped(double r, double g, double b, double a) Converts double component values to an ARGB int
static int	getARGBClamped(float r, float g, float b, float a) Converts float component values to an ARGB int
static int	getARGBClamped(int r, int g, int b, int a)
static int	getBlue(int argb) Gets the blue value of an ARGB colour int
static Color	getColor(int argb)
static Color	getColor(int r, int g, int b)
static int	getGreen(int argb) Gets the green value of an ARGB colour int
static int	getLuminance(int argb) Gets the luminance of an ARGB int
static int	getRed(int argb) Gets the red value of an ARGB colour int
static int	getRGBClamped(double r, double g, double b) Converts double component values to an ARGB int
static int	getRGBClamped(float r, float g, float b) Converts float component values to an ARGB int
Color	getRGBColor(int rgb)
static int	randomARGBColour() Generates a random ARGB colour as a int
static void	toFloat4(float[] col, int offset, int argb) Converts an ARGB value to a array of floats
static int	toGreen(float f)
static int	toGreyScale(double d)
static int	toGreyScale(float f)
static int	toGreyScale(int argb) Gets the grayscale equivalent of an ARGB int Sets alpha to 255 (fully opaque)

Methods inherited from class java.lang.Object

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

Field Detail

RGB_MASK

public static int RGB_MASK

RED_MASK

public static int RED_MASK

GREEN_MASK

public static int GREEN_MASK

BLUE_MASK

public static int BLUE_MASK

ALPHA_MASK

public static int ALPHA_MASK

BYTE_MASK

public static final int BYTE_MASK

See Also:

Constant Field Values

Constructor Detail

Colours

public Colours()

Method Detail

getRed

public static int getRed(int argb)

Gets the red value of an ARGB colour int

Parameters:

argb -

Returns:

Colour value in range [0..255]

getGreen

public static int getGreen(int argb)

Gets the green value of an ARGB colour int

Parameters:

argb -

Returns:

Colour value in range [0..255]

getBlue

public static int getBlue(int argb)

Gets the blue value of an ARGB colour int

Parameters:

argb -

Returns:

Colour value in range [0..255]

getAlpha

public static int getAlpha(int argb)

Gets the alpha value of an ARGB colour int

Parameters:

argb -

Returns:

Alpha value in range [0..255]

toGreyScale

public static int toGreyScale(int argb)

Gets the grayscale equivalent of an ARGB int Sets alpha to 255 (fully opaque)

Parameters:

argb -

Returns:

getLuminance

public static int getLuminance(int argb)

Gets the luminance of an ARGB int

Parameters:

argb -

Returns:

getARGBClamped

public static int getARGBClamped(double r,
                 double g,
                 double b,
                 double a)

Converts double component values to an ARGB int

Parameters:

r - Red value on 0..1 scale

g - Green value on 0..1 scale

b - Blue value on 0..1 scale

a - Alpha value on 0..1 scale

Returns:

getARGBClamped

public static int getARGBClamped(float r,
                 float g,
                 float b,
                 float a)

Converts float component values to an ARGB int

Parameters:

r - Red value on 0..1 scale

g - Green value on 0..1 scale

b - Blue value on 0..1 scale

a - Alpha value on 0..1 scale

Returns:

getRGBClamped

public static int getRGBClamped(float r,
                float g,
                float b)

Converts float component values to an ARGB int

Parameters:

r - Red value on 0..1 scale

g - Green value on 0..1 scale

b - Blue value on 0..1 scale

Returns:

getRGBClamped

public static int getRGBClamped(double r,
                double g,
                double b)

Converts double component values to an ARGB int

Parameters:

r - Red value on 0..1 scale

g - Green value on 0..1 scale

b - Blue value on 0..1 scale

Returns:

getARGBClamped

public static int getARGBClamped(int r,
                 int g,
                 int b,
                 int a)

toFloat4

public static void toFloat4(float[] col,
            int offset,
            int argb)

Converts an ARGB value to a array of floats

Parameters:

col -

offset -

argb -

fromFloat4

public static int fromFloat4(float[] col,
             int offset)

Converts an array of floats to an ARGB value

Parameters:

col -

offset -

Returns:

fromDouble3

public static int fromDouble3(double[] col,
              int offset)

fromFloat3

public static int fromFloat3(float[] col,
             int offset)

getARGB

public static int getARGB(int r,
          int g,
          int b,
          int a)

getARGB

public static int getARGB(int r,
          int g,
          int b)

getARGB

public static int getARGB(int rgb,
          int alpha)

getRGBColor

public Color getRGBColor(int rgb)

getColor

public static Color getColor(int argb)

randomARGBColour

public static int randomARGBColour()

Generates a random ARGB colour as a int

getColor

public static Color getColor(int r,
             int g,
             int b)

toGreyScale

public static int toGreyScale(float f)

toGreyScale

public static int toGreyScale(double d)

toGreen

public static int toGreen(float f)