- 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 Description protected intdestHeightThe target height to scale the image.protected intdestWidthThe target width to scale the image.protected ObjectoutpixbufAbytearray initialized with a size ofdestWidthand used to deliver a row of pixel data to theImageConsumer.protected int[]srccolsAnintarray containing information about a column of pixels.protected intsrcHeightThe height of the source image.protected int[]srcrowsAnintarray containing information about a row of pixels.protected intsrcWidthThe width of the source image.-
Fields declared in class java.awt.image.ImageFilter
consumer
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Fields declared in interface java.awt.image.ImageConsumer
COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT
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Constructor Summary
Constructors Constructor 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
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidsetDimensions(int w, int h)Override the dimensions of the source image and pass the dimensions of the new scaled size to the ImageConsumer.voidsetPixels(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.voidsetPixels(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.voidsetProperties(Hashtable<?,?> props)Passes along the properties from the source object after adding a property indicating the scale applied.-
Methods declared in 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
Anintarray containing information about a row of pixels.
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srccols
protected int[] srccols
Anintarray containing information about a column of pixels.
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outpixbuf
protected Object outpixbuf
Abytearray initialized with a size ofdestWidthand 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- ifwidthequals zero orheightequals 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
ImageProducerof theImagewhose 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:
setPropertiesin interfaceImageConsumer- Overrides:
setPropertiesin 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
ImageProducerof theImagewhose 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:
setDimensionsin interfaceImageConsumer- Overrides:
setDimensionsin 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
ImageProducerof theImagewhose 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:
setPixelsin interfaceImageConsumer- Overrides:
setPixelsin 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 specifiedColorModelpixels- the array of pixelsoff- the offset into thepixelsarrayscansize- the distance from one row of pixels to the next in thepixelsarray- 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
ImageProducerof theImagewhose 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:
setPixelsin interfaceImageConsumer- Overrides:
setPixelsin 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 specifiedColorModelpixels- the array of pixelsoff- the offset into thepixelsarrayscansize- the distance from one row of pixels to the next in thepixelsarray- See Also:
ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)
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