de.lmu.ifi.dbs.elki.data.images
Class BlendComposite

java.lang.Object
  de.lmu.ifi.dbs.elki.data.images.BlendComposite

All Implemented Interfaces:

Composite

public class BlendComposite
extends Object
implements Composite

Class to use in Graphics2D.setComposite(java.awt.Composite) that facilitates basic image blending such as lighten-only overlays.

Nested Class Summary

(package private) class	BlendComposite.AverageBlendingContext Blending context for an "average" blending.
protected class	BlendComposite.BlendingContext Abstract blending context that takes care of color space conversion and pixel iteration.
(package private) class	BlendComposite.DarkenBlendingContext Blending context for a "darken only" blending.
(package private) class	BlendComposite.LightenBlendingContext Blending context for a "lighten only" blending.
(package private) class	BlendComposite.MultiplyBlendingContext Blending context for a "multiply" blending.
(package private) class	BlendComposite.OverlayBlendingContext Blending context for a "overlay" blending.
(package private) class	BlendComposite.ScreenBlendingContext Blending context for a "screen" blending.

Field Summary

private double	alpha Alpha (opacity) value.
static int	AVERAGE "Average" blending.
static int	DARKEN Darken-only blending.
static int	LIGHTEN Lighten-only blending.
private int	mode Blending mode to use.
static int	MULTIPLY "Multiply" blending.
static int	NORMAL Source blending, using the source image only.
static int	OVERLAY "Overlay" blending.
static int	SCREEN "Screen" blending.

Constructor Summary

BlendComposite(int mode)
Simplified constructor with full opacity.

BlendComposite(int mode, double alpha)
Full constructor, with alpha (opacity) value.

Method Summary

protected static int	combineComponents(int a, int r, int g, int b) Helper function that combines separate ARGB values into a single ARGB integer.
CompositeContext	createContext(ColorModel srcColorModel, ColorModel dstColorModel, RenderingHints hints)

Methods inherited from class java.lang.Object

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

Field Detail

NORMAL

public static final int NORMAL

Source blending, using the source image only.

See Also:

Constant Field Values

LIGHTEN

public static final int LIGHTEN

Lighten-only blending.

See Also:

Constant Field Values

DARKEN

public static final int DARKEN

Darken-only blending.

See Also:

Constant Field Values

SCREEN

public static final int SCREEN

"Screen" blending.

See Also:

Constant Field Values

MULTIPLY

public static final int MULTIPLY

"Multiply" blending.

See Also:

Constant Field Values

OVERLAY

public static final int OVERLAY

"Overlay" blending.

See Also:

Constant Field Values

AVERAGE

public static final int AVERAGE

"Average" blending.

See Also:

Constant Field Values

alpha

private double alpha

Alpha (opacity) value.

mode

private int mode

Blending mode to use.

Constructor Detail

BlendComposite

public BlendComposite(int mode)

Simplified constructor with full opacity.

Parameters:

mode - Blending mode.

BlendComposite

public BlendComposite(int mode,
                      double alpha)

Full constructor, with alpha (opacity) value.

Parameters:

mode - Blending mode

alpha - Opacity value

Method Detail

createContext

public CompositeContext createContext(ColorModel srcColorModel,
                                      ColorModel dstColorModel,
                                      RenderingHints hints)

Specified by:

createContext in interface Composite

combineComponents

protected static final int combineComponents(int a,
                                             int r,
                                             int g,
                                             int b)

Helper function that combines separate ARGB values into a single ARGB integer.

Parameters:

a - alpha component (0-255)

r - red component (0-255)

g - green component (0-255)

b - blue component (0-255)

Returns:

Integer value in ARGB order.