- java.lang.Object
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- java.awt.image.ImageFilter
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- java.awt.image.ReplicateScaleFilter
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- All Implemented Interfaces:
- ImageConsumer, Cloneable
- Direct Known Subclasses:
- AreaAveragingScaleFilter
public class ReplicateScaleFilter extends ImageFilter
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.
- See Also:
FilteredImageSource
,ImageFilter
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Field Summary
Fields Modifier and Type Field and Description protected int
destHeight
The target height to scale the image.protected int
destWidth
The target width to scale the image.protected Object
outpixbuf
Abyte
array initialized with a size ofdestWidth
and used to deliver a row of pixel data to theImageConsumer
.protected int[]
srccols
Anint
array containing information about a column of pixels.protected int
srcHeight
The height of the source image.protected int[]
srcrows
Anint
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
consumer
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Fields inherited from interface java.awt.image.ImageConsumer
COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT
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Constructor Summary
Constructors Constructor and Description ReplicateScaleFilter(int width, int height)
Constructs a ReplicateScaleFilter that scales the pixels from its source Image as specified by the width and height parameters.
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Method Summary
Methods Modifier and Type Method and Description 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
clone, getFilterInstance, imageComplete, resendTopDownLeftRight, setColorModel, setHints
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Field Detail
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srcWidth
protected int srcWidth
The width of the source image.
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srcHeight
protected int srcHeight
The height of the source image.
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destWidth
protected int destWidth
The target width to scale the image.
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destHeight
protected int destHeight
The target height to scale the image.
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srcrows
protected int[] srcrows
Anint
array containing information about a row of pixels.
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srccols
protected int[] srccols
Anint
array containing information about a column of pixels.
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outpixbuf
protected Object outpixbuf
Abyte
array initialized with a size ofdestWidth
and used to deliver a row of pixel data to theImageConsumer
.
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Constructor Detail
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ReplicateScaleFilter
public ReplicateScaleFilter(int width, int height)
Constructs a ReplicateScaleFilter that scales the pixels from its source Image as specified by the width and height parameters.- Parameters:
width
- the target width to scale the imageheight
- the target height to scale the image- Throws:
IllegalArgumentException
- ifwidth
equals zero orheight
equals zero
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Method Detail
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setProperties
public void setProperties(Hashtable<?,?> props)
Passes along the properties from the source object after adding a property indicating the scale applied. This method invokessuper.setProperties
, which might result in additional properties being added.Note: This method is intended to be called by the
ImageProducer
of theImage
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.- Specified by:
setProperties
in interfaceImageConsumer
- Overrides:
setProperties
in classImageFilter
- Parameters:
props
- the properties from the source object
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setDimensions
public 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.Note: This method is intended to be called by the
ImageProducer
of theImage
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.- Specified by:
setDimensions
in interfaceImageConsumer
- Overrides:
setDimensions
in classImageFilter
- Parameters:
w
- the width of the source imageh
- the height of the source image- See Also:
ImageConsumer
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setPixels
public 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.Note: This method is intended to be called by the
ImageProducer
of theImage
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.- Specified by:
setPixels
in interfaceImageConsumer
- Overrides:
setPixels
in classImageFilter
- Parameters:
x
- the X coordinate of the upper-left corner of the area of pixels to be sety
- the Y coordinate of the upper-left corner of the area of pixels to be setw
- the width of the area of pixelsh
- the height of the area of pixelsmodel
- the specifiedColorModel
pixels
- the array of pixelsoff
- the offset into thepixels
arrayscansize
- the distance from one row of pixels to the next in thepixels
array- See Also:
ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)
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setPixels
public 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.Note: This method is intended to be called by the
ImageProducer
of theImage
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.- Specified by:
setPixels
in interfaceImageConsumer
- Overrides:
setPixels
in classImageFilter
- Parameters:
x
- the X coordinate of the upper-left corner of the area of pixels to be sety
- the Y coordinate of the upper-left corner of the area of pixels to be setw
- the width of the area of pixelsh
- the height of the area of pixelsmodel
- the specifiedColorModel
pixels
- the array of pixelsoff
- the offset into thepixels
arrayscansize
- the distance from one row of pixels to the next in thepixels
array- See Also:
ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)
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Document created the 11/06/2005, last modified the 04/03/2020
Source of the printed document:https://www.gaudry.be/en/java-api-rf-java/awt/image/replicatescalefilter.html
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