java.lang.Object
java.awt.image.LookupTable
- Direct Known Subclasses:
- ByteLookupTable,- ShortLookupTable
This abstract class defines a lookup table object.  ByteLookupTable
 and ShortLookupTable are subclasses, which
 contain byte and short data, respectively.  A lookup table
 contains data arrays for one or more bands (or components) of an image
 (for example, separate arrays for R, G, and B),
 and it contains an offset which will be subtracted from the
 input values before indexing into the arrays.  This allows an array
 smaller than the native data size to be provided for a
 constrained input.  If there is only one array in the lookup
 table, it will be applied to all bands.  All arrays must be the
 same size.
- See Also:
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Constructor SummaryConstructorsModifierConstructorDescriptionprotectedLookupTable(int offset, int numComponents) Constructs a new LookupTable from the number of components and an offset into the lookup table.
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Method SummaryModifier and TypeMethodDescriptionintReturns the number of components in the lookup table.intReturns the offset.abstract int[]lookupPixel(int[] src, int[] dest) Returns anintarray of components for one pixel.
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Constructor Details- 
LookupTableprotected LookupTable(int offset, int numComponents) Constructs a new LookupTable from the number of components and an offset into the lookup table.- Parameters:
- offset- the offset to subtract from input values before indexing into the data arrays for this- LookupTable
- numComponents- the number of data arrays in this- LookupTable
- Throws:
- IllegalArgumentException- if- offsetis less than 0 or if- numComponentsis less than 1
 
 
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Method Details- 
getNumComponentspublic int getNumComponents()Returns the number of components in the lookup table.- Returns:
- the number of components in this LookupTable.
 
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getOffsetpublic int getOffset()Returns the offset.- Returns:
- the offset of this LookupTable.
 
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lookupPixelpublic abstract int[] lookupPixel(int[] src, int[] dest) Returns anintarray of components for one pixel. Thedestarray contains the result of the lookup and is returned. If dest isnull, a new array is allocated. The source and destination can be equal.- Parameters:
- src- the source array of components of one pixel
- dest- the destination array of components for one pixel, translated with this- LookupTable
- Returns:
- an intarray of components for one pixel.
 
 
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