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/OpenJDK 21

Class GrayFilter

All Implemented Interfaces:
ImageConsumer, Cloneable
public class GrayFilter extends RGBImageFilter
An image filter that "disables" an image by turning it into a grayscale image, and brightening the pixels in the image. Used by buttons to create an image for a disabled button.
Since:
1.2

Field Summary

Fields declared in class java.awt.image.RGBImageFilter

canFilterIndexColorModel, newmodel, origmodel

Fields declared in class java.awt.image.ImageFilter

consumer

Constructor Summary

Constructor Description
GrayFilter(boolean b, int p)
Constructs a GrayFilter object that filters a color image to a grayscale image.

Method Summary

Modifier and Type Method Description
static Image createDisabledImage(Image i)
Creates a disabled image
int filterRGB(int x, int y, int rgb)
Overrides RGBImageFilter.filterRGB.

Methods declared in class java.lang.Object

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

Constructor Details

GrayFilter

public GrayFilter(boolean b, int p)
Constructs a GrayFilter object that filters a color image to a grayscale image. Used by buttons to create disabled ("grayed out") button images.
Parameters:
b - a boolean -- true if the pixels should be brightened
p - an int in the range 0..100 that determines the percentage of gray, where 100 is the darkest gray, and 0 is the lightest

Method Details

createDisabledImage

public static Image createDisabledImage(Image i)
Creates a disabled image
Parameters:
i - an Image to be created as disabled
Returns:
the new grayscale image created from i

filterRGB

public int filterRGB(int x, int y, int rgb)
Overrides RGBImageFilter.filterRGB.
Specified by:
filterRGB in class RGBImageFilter
Parameters:
x - the X coordinate of the pixel
y - the Y coordinate of the pixel
rgb - the integer pixel representation in the default RGB color model
Returns:
a filtered pixel in the default RGB color model.
See Also:

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/GrayFilter.html