- 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 SummaryFields 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.ImageFilterconsumer
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Fields declared in interface java.awt.image.ImageConsumerCOMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT
 
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Constructor SummaryConstructors 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 SummaryAll 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.ImageFilterclone, getFilterInstance, imageComplete, resendTopDownLeftRight, setColorModel, setHints
 
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Field Detail- 
srcWidthprotected int srcWidth The width of the source image.
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srcHeightprotected int srcHeight The height of the source image.
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destWidthprotected int destWidth The target width to scale the image.
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destHeightprotected int destHeight The target height to scale the image.
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srcrowsprotected int[] srcrows Anintarray containing information about a row of pixels.
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srccolsprotected int[] srccols Anintarray containing information about a column of pixels.
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outpixbufprotected Object outpixbuf Abytearray initialized with a size ofdestWidthand used to deliver a row of pixel data to theImageConsumer.
 
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Constructor Detail- 
ReplicateScaleFilterpublic 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 image
- height- the target height to scale the image
- Throws:
- IllegalArgumentException- if- widthequals zero or- heightequals zero
 
 
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Method Detail- 
setPropertiespublic 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 interface- ImageConsumer
- Overrides:
- setPropertiesin class- ImageFilter
- Parameters:
- props- the properties from the source object
 
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setDimensionspublic 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 interface- ImageConsumer
- Overrides:
- setDimensionsin class- ImageFilter
- Parameters:
- w- the width of the source image
- h- the height of the source image
- See Also:
- ImageConsumer
 
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setPixelspublic 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 interface- ImageConsumer
- Overrides:
- setPixelsin class- ImageFilter
- Parameters:
- x- the X coordinate of the upper-left corner of the area of pixels to be set
- y- the Y coordinate of the upper-left corner of the area of pixels to be set
- w- the width of the area of pixels
- h- the height of the area of pixels
- model- the specified- ColorModel
- pixels- the array of pixels
- off- the offset into the- pixelsarray
- scansize- the distance from one row of pixels to the next in the- pixelsarray
- See Also:
- ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)
 
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setPixelspublic 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 interface- ImageConsumer
- Overrides:
- setPixelsin class- ImageFilter
- Parameters:
- x- the X coordinate of the upper-left corner of the area of pixels to be set
- y- the Y coordinate of the upper-left corner of the area of pixels to be set
- w- the width of the area of pixels
- h- the height of the area of pixels
- model- the specified- ColorModel
- pixels- the array of pixels
- off- the offset into the- pixelsarray
- scansize- the distance from one row of pixels to the next in the- pixelsarray
- See Also:
- ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)
 
 
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