Package Summary  Overview Summary

class:DataBuffer [NONE]

  • Direct Known Subclasses:
    DataBufferByte, DataBufferDouble, DataBufferFloat, DataBufferInt, DataBufferShort, DataBufferUShort


    public abstract class DataBuffer
    extends Object
    
    This class exists to wrap one or more data arrays. Each data array in the DataBuffer is referred to as a bank. Accessor methods for getting and setting elements of the DataBuffer's banks exist with and without a bank specifier. The methods without a bank specifier use the default 0th bank. The DataBuffer can optionally take an offset per bank, so that data in an existing array can be used even if the interesting data doesn't start at array location zero. Getting or setting the 0th element of a bank, uses the (0+offset)th element of the array. The size field specifies how much of the data array is available for use. Size + offset for a given bank should never be greater than the length of the associated data array. The data type of a data buffer indicates the type of the data array(s) and may also indicate additional semantics, e.g. storing unsigned 8-bit data in elements of a byte array. The data type may be TYPE_UNDEFINED or one of the types defined below. Other types may be added in the future. Generally, an object of class DataBuffer will be cast down to one of its data type specific subclasses to access data type specific methods for improved performance. Currently, the Java 2D(tm) API image classes use TYPE_BYTE, TYPE_USHORT, TYPE_INT, TYPE_SHORT, TYPE_FLOAT, and TYPE_DOUBLE DataBuffers to store image data.
    See Also:
    Raster, SampleModel

field:TYPE_BYTE [NONE]

field:TYPE_USHORT [NONE]

field:TYPE_SHORT [NONE]

field:TYPE_INT [NONE]

field:TYPE_FLOAT [NONE]

field:TYPE_DOUBLE [NONE]

field:TYPE_UNDEFINED [NONE]

field:dataType [NONE]

  • dataType

    protected int dataType
    The data type of this DataBuffer.

field:banks [NONE]

  • banks

    protected int banks
    The number of banks in this DataBuffer.

field:offset [NONE]

  • offset

    protected int offset
    Offset into default (first) bank from which to get the first element.

field:size [NONE]

  • size

    protected int size
    Usable size of all banks.

field:offsets [NONE]

  • offsets

    protected int[] offsets
    Offsets into all banks.

constructor:DataBuffer(int, int) [NONE]

  • DataBuffer

    protected DataBuffer​(int dataType,
                         int size)
    Constructs a DataBuffer containing one bank of the specified data type and size.
    Parameters:
    dataType - the data type of this DataBuffer
    size - the size of the banks

constructor:DataBuffer(int, int, int) [NONE]

  • DataBuffer

    protected DataBuffer​(int dataType,
                         int size,
                         int numBanks)
    Constructs a DataBuffer containing the specified number of banks. Each bank has the specified size and an offset of 0.
    Parameters:
    dataType - the data type of this DataBuffer
    size - the size of the banks
    numBanks - the number of banks in this DataBuffer

constructor:DataBuffer(int, int, int, int) [NONE]

  • DataBuffer

    protected DataBuffer​(int dataType,
                         int size,
                         int numBanks,
                         int offset)
    Constructs a DataBuffer that contains the specified number of banks. Each bank has the specified datatype, size and offset.
    Parameters:
    dataType - the data type of this DataBuffer
    size - the size of the banks
    numBanks - the number of banks in this DataBuffer
    offset - the offset for each bank

constructor:DataBuffer(int, int, int, int[]) [NONE]

  • DataBuffer

    protected DataBuffer​(int dataType,
                         int size,
                         int numBanks,
                         int[] offsets)
    Constructs a DataBuffer which contains the specified number of banks. Each bank has the specified datatype and size. The offset for each bank is specified by its respective entry in the offsets array.
    Parameters:
    dataType - the data type of this DataBuffer
    size - the size of the banks
    numBanks - the number of banks in this DataBuffer
    offsets - an array containing an offset for each bank.
    Throws:
    ArrayIndexOutOfBoundsException - if numBanks does not equal the length of offsets

method:getDataTypeSize(int) [NONE]

  • getDataTypeSize

    public static int getDataTypeSize​(int type)
    Returns the size (in bits) of the data type, given a datatype tag.
    Parameters:
    type - the value of one of the defined datatype tags
    Returns:
    the size of the data type
    Throws:
    IllegalArgumentException - if type is less than zero or greater than TYPE_DOUBLE

method:getDataType() [NONE]

  • getDataType

    public int getDataType​()
    Returns the data type of this DataBuffer.
    Returns:
    the data type of this DataBuffer.

method:getSize() [NONE]

  • getSize

    public int getSize​()
    Returns the size (in array elements) of all banks.
    Returns:
    the size of all banks.

method:getOffset() [NONE]

  • getOffset

    public int getOffset​()
    Returns the offset of the default bank in array elements.
    Returns:
    the offset of the default bank.

method:getOffsets() [NONE]

  • getOffsets

    public int[] getOffsets​()
    Returns the offsets (in array elements) of all the banks.
    Returns:
    the offsets of all banks.

method:getNumBanks() [NONE]

  • getNumBanks

    public int getNumBanks​()
    Returns the number of banks in this DataBuffer.
    Returns:
    the number of banks.

method:getElem(int) [NONE]

  • getElem

    public int getElem​(int i)
    Returns the requested data array element from the first (default) bank as an integer.
    Parameters:
    i - the index of the requested data array element
    Returns:
    the data array element at the specified index.
    See Also:
    setElem(int, int) , setElem(int, int, int)

method:getElem(int, int) [NONE]

  • getElem

    public abstract int getElem​(int bank,
                                int i)
    Returns the requested data array element from the specified bank as an integer.
    Parameters:
    bank - the specified bank
    i - the index of the requested data array element
    Returns:
    the data array element at the specified index from the specified bank at the specified index.
    See Also:
    setElem(int, int) , setElem(int, int, int)

method:setElem(int, int) [NONE]

  • setElem

    public void setElem​(int i,
                        int val)
    Sets the requested data array element in the first (default) bank from the given integer.
    Parameters:
    i - the specified index into the data array
    val - the data to set the element at the specified index in the data array
    See Also:
    getElem(int), getElem(int, int)

method:setElem(int, int, int) [NONE]

  • setElem

    public abstract void setElem​(int bank,
                                 int i,
                                 int val)
    Sets the requested data array element in the specified bank from the given integer.
    Parameters:
    bank - the specified bank
    i - the specified index into the data array
    val - the data to set the element in the specified bank at the specified index in the data array
    See Also:
    getElem(int), getElem(int, int)

method:getElemFloat(int) [NONE]

  • getElemFloat

    public float getElemFloat​(int i)
    Returns the requested data array element from the first (default) bank as a float. The implementation in this class is to cast getElem(i) to a float. Subclasses may override this method if another implementation is needed.
    Parameters:
    i - the index of the requested data array element
    Returns:
    a float value representing the data array element at the specified index.
    See Also:
    setElemFloat(int, float) , setElemFloat(int, int, float)

method:getElemFloat(int, int) [NONE]

  • getElemFloat

    public float getElemFloat​(int bank,
                              int i)
    Returns the requested data array element from the specified bank as a float. The implementation in this class is to cast getElem(int, int) to a float. Subclasses can override this method if another implementation is needed.
    Parameters:
    bank - the specified bank
    i - the index of the requested data array element
    Returns:
    a float value representing the data array element from the specified bank at the specified index.
    See Also:
    setElemFloat(int, float) , setElemFloat(int, int, float)

method:setElemFloat(int, float) [NONE]

  • setElemFloat

    public void setElemFloat​(int i,
                             float val)
    Sets the requested data array element in the first (default) bank from the given float. The implementation in this class is to cast val to an int and call setElem(int, int) . Subclasses can override this method if another implementation is needed.
    Parameters:
    i - the specified index
    val - the value to set the element at the specified index in the data array
    See Also:
    getElemFloat(int), getElemFloat(int, int)

method:setElemFloat(int, int, float) [NONE]

  • setElemFloat

    public void setElemFloat​(int bank,
                             int i,
                             float val)
    Sets the requested data array element in the specified bank from the given float. The implementation in this class is to cast val to an int and call setElem(int, int) . Subclasses can override this method if another implementation is needed.
    Parameters:
    bank - the specified bank
    i - the specified index
    val - the value to set the element in the specified bank at the specified index in the data array
    See Also:
    getElemFloat(int), getElemFloat(int, int)

method:getElemDouble(int) [NONE]

  • getElemDouble

    public double getElemDouble​(int i)
    Returns the requested data array element from the first (default) bank as a double. The implementation in this class is to cast getElem(int) to a double. Subclasses can override this method if another implementation is needed.
    Parameters:
    i - the specified index
    Returns:
    a double value representing the element at the specified index in the data array.
    See Also:
    setElemDouble(int, double) , setElemDouble(int, int, double)

method:getElemDouble(int, int) [NONE]

  • getElemDouble

    public double getElemDouble​(int bank,
                                int i)
    Returns the requested data array element from the specified bank as a double. The implementation in this class is to cast getElem(bank, i) to a double. Subclasses may override this method if another implementation is needed.
    Parameters:
    bank - the specified bank
    i - the specified index
    Returns:
    a double value representing the element from the specified bank at the specified index in the data array.
    See Also:
    setElemDouble(int, double) , setElemDouble(int, int, double)

method:setElemDouble(int, double) [NONE]

  • setElemDouble

    public void setElemDouble​(int i,
                              double val)
    Sets the requested data array element in the first (default) bank from the given double. The implementation in this class is to cast val to an int and call setElem(int, int) . Subclasses can override this method if another implementation is needed.
    Parameters:
    i - the specified index
    val - the value to set the element at the specified index in the data array
    See Also:
    getElemDouble(int), getElemDouble(int, int)

method:setElemDouble(int, int, double) [NONE]

  • setElemDouble

    public void setElemDouble​(int bank,
                              int i,
                              double val)
    Sets the requested data array element in the specified bank from the given double. The implementation in this class is to cast val to an int and call setElem(int, int) . Subclasses can override this method if another implementation is needed.
    Parameters:
    bank - the specified bank
    i - the specified index
    val - the value to set the element in the specified bank at the specified index of the data array
    See Also:
    getElemDouble(int), getElemDouble(int, int)