playn.core

Class Color

java.lang.Object

playn.core.Color

public class Color
extends java.lang.Object

Utility methods for working with packed-integer colors.

Constructor Summary

Constructors

Constructor and Description
Color()

Method Summary

Modifier and Type	Method and Description
static int	alpha(int color) Extracts the alpha, in range [0, 255], from the given packed color.
static int	argb(int a, int r, int g, int b) Creates a packed integer color from four ARGB values in the range [0, 255].
static int	blue(int color) Extracts the blue component, in range [0, 255], from the given packed color.
static float	decodeLower(float encoded) Decodes and returns the lower color value in a two color value encoded by encode(float, float).
static float	decodeUpper(float encoded) Decodes and returns the upper color value in a two color value encoded by encode(float, float).
static float	encode(float upper, float lower) Encodes two [0..1] color values into the format used by the standard shader program.
static int	green(int color) Extracts the green component, in range [0, 255], from the given packed color.
static int	red(int color) Extracts the red component, in range [0, 255], from the given packed color.
static int	rgb(int r, int g, int b) Creates a packed integer color from three RGB values in the range [0, 255].
static int	withAlpha(int color, int alpha) Returns a new color that's a copy of the given color, but with the new alpha value, in range [0, 255].

Methods inherited from class java.lang.Object

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

Constructor Detail

Color

public Color()

Method Detail

argb

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

Creates a packed integer color from four ARGB values in the range [0, 255].

rgb

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

Creates a packed integer color from three RGB values in the range [0, 255].

alpha

public static final int alpha(int color)

Extracts the alpha, in range [0, 255], from the given packed color.

red

public static final int red(int color)

Extracts the red component, in range [0, 255], from the given packed color.

green

public static final int green(int color)

Extracts the green component, in range [0, 255], from the given packed color.

blue

public static final int blue(int color)

Extracts the blue component, in range [0, 255], from the given packed color.

withAlpha

public static int withAlpha(int color,
                            int alpha)

Returns a new color that's a copy of the given color, but with the new alpha value, in range [0, 255].

encode

public static float encode(float upper,
                           float lower)

Encodes two [0..1] color values into the format used by the standard shader program. The standard shader program delivers tinting information as two floats per vertex (AR and GB).

decodeUpper

public static float decodeUpper(float encoded)

Decodes and returns the upper color value in a two color value encoded by encode(float, float).

decodeLower

public static float decodeLower(float encoded)

Decodes and returns the lower color value in a two color value encoded by encode(float, float).