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Java AWT

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java.awt.image Reference
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ReplicateScaleFilter (New)

Name

ReplicateScaleFilter (New)

[Graphic: Figure from the text]

Description

The ReplicateScaleFilter class uses a simple-minded algorithm to scale an image. If the image is to be reduced, rows and columns of pixels are removed. If the image is to be expanded, rows and columns are duplicated (replicated).

Class Definition

public class ReplicateScaleFilter
    extends java.awt.image.ImageFilter {
  // Variables
  protected int destHeight;
  protected int destWidth;
  protected Object outpixbuf;
  protected int srcHeight;
  protected int srcWidth;
  protected int[] srccols;
  protected int[] srcrows;
  // Constructor
  public ReplicateScaleFilter(int width, int height);
  // Instance Methods
  public void setDimensions (int w, int h);
  public void setPixels(int x, int y, int w, int h, ColorModel model, 
      byte[] pixels, int off, int scansize);
  public void setPixels(int x, int y, int w, int h, ColorModel model, 
      int[] pixels, int off, int scansize);
  public void setProperties(Hashtable props);
}

Variables

destHeight

protected int destHeight

Height of the scaled image.

destWidth

protected int destWidth

Width of the scaled image.

srcHeight

protected int srcHeight

Height of the original image.

srcWidth

protected int srcWidth

Width of the original image.

srccols

protected int[] srccols

Internal array used to map incoming columns to outgoing columns.

srcrows

protected int[] srcrows

Internal array used to map incoming rows to outgoing rows.

Constructor

ReplicateScaleFilter

public ReplicateScaleFilter (int width, int height)

Parameters

width

Width of scaled image.

height

Height of scaled image.

Description

Constructs a ReplicateScaleFilter that scales the original image to the specified size. If both width and height are -1, the destination image size will be set to the source image size. If either one of the parameters is -1, it will be set to preserve the aspect ratio of the original image.

Instance Methods

setDimensions

public void setDimensions (int w, int h)

Parameters

w

Width of the source image.

h

Height of the source image.

Overrides

ImageFilter.setDimensions(int, int)

Description

Sets the size of the source image.

setPixels

void setPixels (int x, int y, int w, int h, ColorModel model, byte[] pixels, int off, int scansize)

Parameters

x

x-coordinate of top-left corner of pixel data delivered with this method call.

y

y-coordinate of top-left corner of pixel data delivered with this method call.

w

Width of the rectangle of pixel data delivered with this method call.

h

Height of the rectangle of pixel data delivered with this method call.

model

Color model of image data.

pixels

Image data.

off

Offset from beginning of the pixels array.

scansize

Size of each line of data in pixels array.

Overrides

ImageFilter.setPixels(int, int, int, int, ColorModel, byte[], int, int)

Description

Receives a rectangle of image data from the ImageProducer; scales these pixels and delivers them to any ImageConsumers.

void setPixels (int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)

Parameters

x

x-coordinate of top-left corner of pixel data delivered with this method call.

y

y-coordinate of top-left corner of pixel data delivered with this method call.

w

Width of the rectangle of pixel data delivered with this method call.

h

Height of the rectangle of pixel data delivered with this method call.

model

Color model of image data.

pixels

Image data.

off

Offset from beginning of the pixels array.

scansize

Size of each line of data in pixels array.

Overrides

ImageFilter.setPixels(int, int, int, int, ColorModel, int[], int, int)

Description

Receives a rectangle of image data from the ImageProducer; scales these pixels and delivers them to any ImageConsumers.

setProperties

public void setProperties (Hashtable props)

Parameters

props

The properties for the image.

Overrides

ImageFilter.setProperties(Hashtable)

Description

Adds the "rescale" image property to the properties list.

See Also

ColorModel, Hashtable, ImageConsumer, ImageFilter, ImageProducer


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