Module java.desktop

Package java.awt.image

Class DataBufferDouble

java.lang.Object

java.awt.image.DataBuffer

java.awt.image.DataBufferDouble

public final class DataBufferDouble
extends DataBuffer

This class extends DataBuffer and stores data internally in double form.

Note that some implementations may function more efficiently if they can maintain control over how the data for an image is stored. For example, optimizations such as caching an image in video memory require that the implementation track all modifications to that data. Other implementations may operate better if they can store the data in locations other than a Java array. To maintain optimum compatibility with various optimizations it is best to avoid constructors and methods which expose the underlying storage as a Java array as noted below in the documentation for those methods.

Since:

1.4

Field Summary

Fields declared in class java.awt.image.DataBuffer

banks, dataType, offset, offsets, size, TYPE_BYTE, TYPE_DOUBLE, TYPE_FLOAT, TYPE_INT, TYPE_SHORT, TYPE_UNDEFINED, TYPE_USHORT

Constructor Summary

Constructors

Constructor	Description
DataBufferDouble(double[][] dataArray, int size)	Constructs a double-based DataBuffer with the specified data arrays.
DataBufferDouble(double[][] dataArray, int size, int[] offsets)	Constructs a double-based DataBuffer with the specified data arrays, size, and per-bank offsets.
DataBufferDouble(double[] dataArray, int size)	Constructs a double-based DataBuffer with the specified data array.
DataBufferDouble(double[] dataArray, int size, int offset)	Constructs a double-based DataBuffer with the specified data array.
DataBufferDouble(int size)	Constructs a double-based DataBuffer with a specified size.
DataBufferDouble(int size, int numBanks)	Constructs a double-based DataBuffer with a specified number of banks, all of which are of a specified size.

Method Summary

Modifier and Type	Method	Description
double[][]	getBankData()	Returns the data array for all banks.
double[]	getData()	Returns the default (first) double data array.
double[]	getData(int bank)	Returns the data array for the specified bank.
int	getElem(int i)	Returns the requested data array element from the first (default) bank as an int.
int	getElem(int bank, int i)	Returns the requested data array element from the specified bank as an int.
double	getElemDouble(int i)	Returns the requested data array element from the first (default) bank as a double.
double	getElemDouble(int bank, int i)	Returns the requested data array element from the specified bank as a double.
float	getElemFloat(int i)	Returns the requested data array element from the first (default) bank as a float.
float	getElemFloat(int bank, int i)	Returns the requested data array element from the specified bank as a float.
void	setElem(int i, int val)	Sets the requested data array element in the first (default) bank to the given int.
void	setElem(int bank, int i, int val)	Sets the requested data array element in the specified bank to the given int.
void	setElemDouble(int i, double val)	Sets the requested data array element in the first (default) bank to the given double.
void	setElemDouble(int bank, int i, double val)	Sets the requested data array element in the specified bank to the given double.
void	setElemFloat(int i, float val)	Sets the requested data array element in the first (default) bank to the given float.
void	setElemFloat(int bank, int i, float val)	Sets the requested data array element in the specified bank to the given float.

Methods declared in class java.awt.image.DataBuffer

getDataType, getDataTypeSize, getNumBanks, getOffset, getOffsets, getSize

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DataBufferDouble

public DataBufferDouble(int size)

Constructs a double-based DataBuffer with a specified size.

Parameters:

size - The number of elements in the DataBuffer.

DataBufferDouble

public DataBufferDouble(int size,
 int numBanks)

Constructs a double-based DataBuffer with a specified number of banks, all of which are of a specified size.

Parameters:

size - The number of elements in each bank of the DataBuffer.

numBanks - The number of banks in the DataBuffer.

DataBufferDouble

public DataBufferDouble(double[] dataArray,
 int size)

Constructs a double-based DataBuffer with the specified data array. Only the first size elements are available for use by this DataBuffer. The array must be large enough to hold size elements.

Note that DataBuffer objects created by this constructor may be incompatible with performance optimizations used by some implementations (such as caching an associated image in video memory).

Parameters:

dataArray - An array of doubles to be used as the first and only bank of this DataBuffer.

size - The number of elements of the array to be used.

DataBufferDouble

public DataBufferDouble(double[] dataArray,
 int size,
 int offset)

Constructs a double-based DataBuffer with the specified data array. Only the elements between offset and offset + size - 1 are available for use by this DataBuffer. The array must be large enough to hold offset + size elements.

Note that DataBuffer objects created by this constructor may be incompatible with performance optimizations used by some implementations (such as caching an associated image in video memory).

Parameters:

dataArray - An array of doubles to be used as the first and only bank of this DataBuffer.

size - The number of elements of the array to be used.

offset - The offset of the first element of the array that will be used.

DataBufferDouble

public DataBufferDouble(double[][] dataArray,
 int size)

Constructs a double-based DataBuffer with the specified data arrays. Only the first size elements of each array are available for use by this DataBuffer. The number of banks will be equal to dataArray.length.

Note that DataBuffer objects created by this constructor may be incompatible with performance optimizations used by some implementations (such as caching an associated image in video memory).

Parameters:

dataArray - An array of arrays of doubles to be used as the banks of this DataBuffer.

size - The number of elements of each array to be used.

DataBufferDouble

public DataBufferDouble(double[][] dataArray,
 int size,
 int[] offsets)

Constructs a double-based DataBuffer with the specified data arrays, size, and per-bank offsets. The number of banks is equal to dataArray.length. Each array must be at least as large as size plus the corresponding offset. There must be an entry in the offsets array for each data array.

Note that DataBuffer objects created by this constructor may be incompatible with performance optimizations used by some implementations (such as caching an associated image in video memory).

Parameters:

dataArray - An array of arrays of doubles to be used as the banks of this DataBuffer.

size - The number of elements of each array to be used.

offsets - An array of integer offsets, one for each bank.

Method Details

getData

public double[] getData()

Returns the default (first) double data array.

Note that calling this method may cause this DataBuffer object to be incompatible with performance optimizations used by some implementations (such as caching an associated image in video memory).

Returns:

the first double data array.

getData

public double[] getData(int bank)

Returns the data array for the specified bank.

Note that calling this method may cause this DataBuffer object to be incompatible with performance optimizations used by some implementations (such as caching an associated image in video memory).

Parameters:

bank - the data array

Returns:

the data array specified by bank.

getBankData

public double[][] getBankData()

Returns the data array for all banks.

Note that calling this method may cause this DataBuffer object to be incompatible with performance optimizations used by some implementations (such as caching an associated image in video memory).

Returns:

all data arrays from this data buffer.

getElem

public int getElem(int i)

Returns the requested data array element from the first (default) bank as an int.

Overrides:

getElem in class DataBuffer

Parameters:

i - The desired data array element.

Returns:

The data entry as an int.

See Also:

• setElem(int, int)
• setElem(int, int, int)

getElem

public int getElem(int bank,
 int i)

Returns the requested data array element from the specified bank as an int.

Specified by:

getElem in class DataBuffer

Parameters:

bank - The bank number.

i - The desired data array element.

Returns:

The data entry as an int.

See Also:

• setElem(int, int)
• setElem(int, int, int)

setElem

public void setElem(int i,
 int val)

Sets the requested data array element in the first (default) bank to the given int.

Overrides:

setElem in class DataBuffer

Parameters:

i - The desired data array element.

val - The value to be set.

See Also:

• getElem(int)
• getElem(int, int)

setElem

public void setElem(int bank,
 int i,
 int val)

Sets the requested data array element in the specified bank to the given int.

Specified by:

setElem in class DataBuffer

Parameters:

bank - The bank number.

i - The desired data array element.

val - The value to be set.

See Also:

• getElem(int)
• getElem(int, int)

getElemFloat

public float getElemFloat(int i)

Returns the requested data array element from the first (default) bank as a float.

Overrides:

getElemFloat in class DataBuffer

Parameters:

i - The desired data array element.

Returns:

The data entry as a float.

See Also:

• setElemFloat(int, float)
• setElemFloat(int, int, float)

getElemFloat

public float getElemFloat(int bank,
 int i)

Returns the requested data array element from the specified bank as a float.

Overrides:

getElemFloat in class DataBuffer

Parameters:

bank - The bank number.

i - The desired data array element.

Returns:

The data entry as a float.

See Also:

• setElemFloat(int, float)
• setElemFloat(int, int, float)

setElemFloat

public void setElemFloat(int i,
 float val)

Sets the requested data array element in the first (default) bank to the given float.

Overrides:

setElemFloat in class DataBuffer

Parameters:

i - The desired data array element.

val - The value to be set.

See Also:

• getElemFloat(int)
• getElemFloat(int, int)

setElemFloat

public void setElemFloat(int bank,
 int i,
 float val)

Sets the requested data array element in the specified bank to the given float.

Overrides:

setElemFloat in class DataBuffer

Parameters:

bank - The bank number.

i - The desired data array element.

val - The value to be set.

See Also:

• getElemFloat(int)
• getElemFloat(int, int)

getElemDouble

public double getElemDouble(int i)

Returns the requested data array element from the first (default) bank as a double.

Overrides:

getElemDouble in class DataBuffer

Parameters:

i - The desired data array element.

Returns:

The data entry as a double.

See Also:

• setElemDouble(int, double)
• setElemDouble(int, int, double)

getElemDouble

public double getElemDouble(int bank,
 int i)

Returns the requested data array element from the specified bank as a double.

Overrides:

getElemDouble in class DataBuffer

Parameters:

bank - The bank number.

i - The desired data array element.

Returns:

The data entry as a double.

See Also:

• setElemDouble(int, double)
• setElemDouble(int, int, double)

setElemDouble

public void setElemDouble(int i,
 double val)

Sets the requested data array element in the first (default) bank to the given double.

Overrides:

setElemDouble in class DataBuffer

Parameters:

i - The desired data array element.

val - The value to be set.

See Also:

• getElemDouble(int)
• getElemDouble(int, int)

setElemDouble

public void setElemDouble(int bank,
 int i,
 double val)

Sets the requested data array element in the specified bank to the given double.

Overrides:

setElemDouble in class DataBuffer

Parameters:

bank - The bank number.

i - The desired data array element.

val - The value to be set.

See Also:

• getElemDouble(int)
• getElemDouble(int, int)