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Chapter 22 java.awt.image Reference |
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ReplicateScaleFilter 
Name
ReplicateScaleFilter
![[Graphic: Figure from the text]](./figs/replica.gif)
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.
outpixbuf
protected Object outpixbuf
An internal buffer.
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.
- width
- 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.
- w
- 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.
- x
- 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.
- x
- 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.
- props
- 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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| PixelGrabber |  |
RGBImageFilter |
