[Chapter 22] DirectColorModel
Author: John Zukowski
Date: Thu Jul 31 15:25:04 1997

#

| Chapter 22 java.awt.image Reference |

# DirectColorModel

## Name

DirectColorModel

##

## Description

The `DirectColorModel` class provides a `ColorModel` that specifies a translation between pixels and alpha, red, green, and blue component values, where the color values are embedded directly within the pixel.

## Class Definition

    public class java.awt.image.DirectColorModel
        extends java.awt.image.ColorModel {
      // Constructors
      public DirectColorModel (int bits, int redMask, int greenMask,
        int blueMask);
      public DirectColorModel (int bits, int redMask, int greenMask,
        int blueMask,
        int alphaMask);
      // Instance Methods
      public final int getAlpha (int pixel);
      public final int getAlphaMask();
      public final int getBlue (int pixel);
      public final int getBlueMask();
      public final int getGreen (int pixel);
      public final int getGreenMask()
      public final int getRed (int pixel);
      public final int getRedMask();
      public final int getRGB (int pixel);
    }

## Constructors

### DirectColorModel

#### public DirectColorModel (int bits, int redMask, int greenMask, int blueMask)

Parameters

  bits

    The number of bits required per pixel of an image using this model.

  redMask

    The location of the red component of a pixel.

  greenMask

    The location of the green component of a pixel.

  blueMask

    The location of the blue component of a pixel.

Throws

  `IllegalArgumentException`

    If the mask bits are not contiguous or overlap.

Description

  Constructs a `DirectColorModel` object with the given size and color masks; the alpha (transparency) component is not used.

#### public DirectColorModel (int bits, int redMask, int greenMask, int blueMask, int alphaMask)

Parameters

  bits

    The number of bits required per pixel of an image using this model.

  redMask

    The location of the red component of a pixel.

  greenMask

    The location of the green component of a pixel.

  blueMask

    The location of the blue component of a pixel.

  alphaMask

    The location of the alpha component of a pixel.

Throws

  `IllegalArgumentException`

    If the mask bits are not contiguous or overlap.

Description

  Constructs a `DirectColorModel` object with the given size and color masks.

## Instance Methods

### getAlpha

#### public final int getAlpha (int pixel)

Parameters

  pixel

    A pixel encoded with this `ColorModel`.

Returns

  The current alpha setting of the pixel.

Overrides

  `ColorModel.getAlpha(``int``)`

### getAlphaMask

#### public final int getAlphaMask()

Returns

  The current alpha mask setting of the color model.

### getBlue

#### public final int getBlue (int pixel)

Parameters

  pixel

    A pixel encoded with this `ColorModel`.

Returns

  The current blue setting of the pixel.

Overrides

  `ColorModel.getBlue(``int``)`

### getBlueMask

#### public final int getBlueMask()

Returns

  The current blue mask setting of the color model.

### getGreen

#### public final int getGreen (int pixel)

Parameters

  pixel

    A pixel encoded with this `ColorModel`.

Returns

  The current green setting of the pixel.

Overrides

  `ColorModel.getGreen(``int``)`

### getGreenMask

#### public final int getGreenMask()

Returns

  The current green mask setting of the color model.

### getRed

#### public final int getRed (int pixel)

Parameters

  pixel

    A pixel encoded with this `ColorModel`.

Returns

  The current red setting of the pixel.

Overrides

  `ColorModel.getRed(``int``)`

### getRedMask

#### public final int getRedMask()

Returns

  The current red mask setting of the color model.

### getRGB

#### public final int getRGB (int pixel)

Parameters

  pixel

    A pixel encoded with this `ColorModel`.

Returns

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

Overrides

  `ColorModel.getRGB(``int``)`

Description

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

## See Also

`ColorModel`

CropImageFilter |  | FilteredImageSource