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Chapter 22 java.awt.image Reference |
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DirectColorModel
Name
DirectColorModel
![[Graphic: Figure from the text]](./figs/directc.gif)
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.
- bits
- Throws
-
- IllegalArgumentException
-
If the mask bits are not contiguous or overlap.
- IllegalArgumentException
- 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.
- bits
- Throws
-
- IllegalArgumentException
-
If the mask bits are not contiguous or overlap.
- IllegalArgumentException
- 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.
- pixel
- 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.
- pixel
- 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.
- pixel
- 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.
- pixel
- 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.
- pixel
- 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
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| CropImageFilter |  |
FilteredImageSource |
