java.lang.Object java.awt.image.ImageFilter java.awt.image.ReplicateScaleFilter
public class ReplicateScaleFilter
An ImageFilter class for scaling images using the simplest algorithm. This class extends the basic ImageFilter Class to scale an existing image and provide a source for a new image containing the resampled image. The pixels in the source image are sampled to produce pixels for an image of the specified size by replicating rows and columns of pixels to scale up or omitting rows and columns of pixels to scale down.
It is meant to be used in conjunction with a FilteredImageSource object to produce scaled versions of existing images. Due to implementation dependencies, there may be differences in pixel values of an image filtered on different platforms.
Field Summary | |
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protected int |
destHeight
The target height to scale the image. |
protected int |
destWidth
The target width to scale the image. |
protected Object |
outpixbuf
A byte array initialized with a size of destWidth and used to deliver a row of pixel data to the ImageConsumer . |
protected int[] |
srccols
An int array containing information about a column of pixels. |
protected int |
srcHeight
The height of the source image. |
protected int[] |
srcrows
An int array containing information about a row of pixels. |
protected int |
srcWidth
The width of the source image. |
Fields inherited from class java.awt.image. ImageFilter |
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consumer |
Fields inherited from interface java.awt.image. ImageConsumer |
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COMPLETESCANLINES , IMAGEABORTED , IMAGEERROR , RANDOMPIXELORDER , SINGLEFRAME , SINGLEFRAMEDONE , SINGLEPASS , STATICIMAGEDONE , TOPDOWNLEFTRIGHT |
Constructor Summary | |
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ReplicateScaleFilter
(int width, int height) Constructs a ReplicateScaleFilter that scales the pixels from its source Image as specified by the width and height parameters. |
Method Summary | |
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void |
setDimensions
(int w, int h) Override the dimensions of the source image and pass the dimensions of the new scaled size to the ImageConsumer. |
void |
setPixels
(int x, int y, int w, int h,
ColorModel
model, byte[] pixels, int off, int scansize) Choose which rows and columns of the delivered byte pixels are needed for the destination scaled image and pass through just those rows and columns that are needed, replicated as necessary. |
void |
setPixels
(int x, int y, int w, int h,
ColorModel
model, int[] pixels, int off, int scansize) Choose which rows and columns of the delivered int pixels are needed for the destination scaled image and pass through just those rows and columns that are needed, replicated as necessary. |
void |
setProperties
(
Hashtable
<?,?> props) Passes along the properties from the source object after adding a property indicating the scale applied. |
Methods inherited from class java.awt.image. ImageFilter |
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clone , getFilterInstance , imageComplete , resendTopDownLeftRight , setColorModel , setHints |
Methods inherited from class java.lang. Object |
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equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait |
Field Detail |
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protected int srcWidth
protected int srcHeight
protected int destWidth
protected int destHeight
protected int[] srcrows
protected int[] srccols
protected Object outpixbuf
Constructor Detail |
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public ReplicateScaleFilter(int width, int height)
Method Detail |
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public void setProperties(Hashtable<?,?> props)
Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.
public void setDimensions(int w, int h)
Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.
public void setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int off, int scansize)
Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.
public void setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)
Note: This method is intended to be called by the ImageProducer of the Image whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.