Полезная информация

Java AWT

Previous Chapter 22
java.awt.image Reference
Next
 

ColorModel

Name

ColorModel

[Graphic: Figure from the text]

Description

The abstract ColorModel class defines the way a Java program represents colors. It provides methods for extracting different color components from a pixel.

Class Definition

public class java.awt.image.ColorModel
    extends java.lang.Object {
  // Variables
  protected int pixel_bits;
  // Constructors
  public ColorModel (int bits);
  // Class Methods
  public static ColorModel getRGBdefault();
  // Instance Methods
  public void finalize(); (New)
  public abstract int getAlpha (int pixel);
  public abstract int getBlue (int pixel);
  public abstract int getGreen (int pixel);
  public int getPixelSize();
  public abstract int getRed (int pixel);
  public int getRGB (int pixel);
}

ProtectedVariables

pixel_bits

protected int pixel_bits

The pixel_bits variable saves the ColorModel's bits setting (the total number of bits per pixel).

Constructors

ColorModel

public ColorModel (int bits)

Parameters

bits

The number of bits required per pixel using this model.

Description

Constructs a ColorModel object.

Class Methods

getRGBdefault

public static ColorModel getRGBdefault()

Returns

The default ColorModel format, which uses 8 bits for each of a pixel's color components: alpha (transparency), red, green, and blue.

Instance Methods

finalize

public void finalize() (New)

Overrides

Object.finalize()

Description

Cleans up when this object is garbage collected.

getAlpha

public abstract int getAlpha (int pixel)

Parameters

pixel

A pixel encoded with this ColorModel.

Returns

The current alpha setting of the pixel.

getBlue

public abstract int getBlue (int pixel)

Parameters

pixel

A pixel encoded with this ColorModel.

Returns

The current blue setting of the pixel.

getGreen

public abstract int getGreen (int pixel)

Parameters

pixel

A pixel encoded with this ColorModel.

Returns

The current green setting of the pixel.

getPixelSize

public int getPixelSize()

Returns

The current pixel size for the color model.

getRed

public abstract int getRed (int pixel)

Parameters

pixel

A pixel encoded with this ColorModel.

Returns

The current red setting of the pixel.

getRGB

public int getRGB (int pixel)

Parameters

pixel

A pixel encoded with this ColorModel.

Returns

The current combined red, green, and blue settings of the pixel.

Description

Gets the color of pixel in the default RGB color model.

See Also

DirectColorModel, IndexColorModel, Object


Previous Home Next
AreaAveragingScaleFilter (New) Book Index CropImageFilter

Java in a Nutshell Java Language Reference Java AWT Java Fundamental Classes Exploring Java