File	Doc	Category	Size	Date	Package
DataBuffer.java	API Doc	Android 1.5 API	12684	Wed May 06 22:41:54 BST 2009	java.awt.image

DataBuffer

• java.lang.Object

Fields Summary
public static final int	TYPE_BYTE The Constant TYPE_BYTE.
public static final int	TYPE_USHORT The Constant TYPE_USHORT.
public static final int	TYPE_SHORT The Constant TYPE_SHORT.
public static final int	TYPE_INT The Constant TYPE_INT.
public static final int	TYPE_FLOAT The Constant TYPE_FLOAT.
public static final int	TYPE_DOUBLE The Constant TYPE_DOUBLE.
public static final int	TYPE_UNDEFINED The Constant TYPE_UNDEFINED.
protected int	dataType The data type indicates the primitive type of the data in this DataBuffer.
protected int	banks The number of data arrays in this DataBuffer.
protected int	offset The starting index for reading the data from the first (or only) internal data array.
protected int	size The length (number of elements) of the data arrays.
protected int[]	offsets The starting indices for reading the data from the internal data arrays.
boolean	dataChanged The data changed.
boolean	dataTaken The data taken.
org.apache.harmony.awt.gl.image.DataBufferListener	listener The listener.

Constructors Summary
protected DataBuffer(int dataType, int size, int numBanks, int[] offsets) Instantiates a new data buffer. param dataType the data type. param size the length (number of elements) of the data arrays. param numBanks the number of data arrays to create. param offsets the starting indices for reading the data from the internal data arrays. AwtImageBackdoorAccessorImpl.init(); this.dataType = dataType; this.size = size; this.banks = numBanks; this.offsets = offsets.clone(); this.offset = offsets[0];
protected DataBuffer(int dataType, int size, int numBanks, int offset) Instantiates a new data buffer with all of the data arrays starting at the same index. param dataType the data type. param size the length (number of elements) of the data arrays. param numBanks the number of data arrays to create. param offset the offset to use for all of the data arrays. this.dataType = dataType; this.size = size; this.banks = numBanks; this.offset = offset; this.offsets = new int[numBanks]; int i = 0; while (i < numBanks) { offsets[i++] = offset; }
protected DataBuffer(int dataType, int size, int numBanks) Instantiates a new data buffer with all of the data arrays read from the beginning (at offset zero). param dataType the data type. param size the length (number of elements) of the data arrays. param numBanks the number of data arrays to create. this.dataType = dataType; this.size = size; this.banks = numBanks; this.offset = 0; this.offsets = new int[numBanks];
protected DataBuffer(int dataType, int size) Instantiates a new data buffer with one internal data array read from the beginning (at offset zero). param dataType the data type. param size the length (number of elements) of the data arrays. this.dataType = dataType; this.size = size; this.banks = 1; this.offset = 0; this.offsets = new int[1];

Methods Summary
void	addDataBufferListener(org.apache.harmony.awt.gl.image.DataBufferListener listener) Adds the data buffer listener. param listener the listener. this.listener = listener;
public int	getDataType() Gets the primitive type of this buffer's data. return the data type. return this.dataType;
public static int	getDataTypeSize(int type) Gets the size in bits of the primitive data type. param type the primitive type. return the size in bits of the primitive data type. switch (type) { case TYPE_BYTE: return 8; case TYPE_USHORT: case TYPE_SHORT: return 16; case TYPE_INT: case TYPE_FLOAT: return 32; case TYPE_DOUBLE: return 64; default: // awt.22C=Unknown data type {0} throw new IllegalArgumentException(Messages.getString("awt.22C", type)); //$NON-NLS-1$ }
public int	getElem(int i) Gets the data value from the first data array at the specified index and returns it as an integer. param i the index within the array where the data should be read. return the data element. return getElem(0, i);
public abstract int	getElem(int bank, int i) Gets the data value from the specified data array at the specified index. param bank the data array to read from. param i the index within the array where the data should be read. return the data element.
public double	getElemDouble(int bank, int i) Gets the double-type data value from the specified data array at the specified index. param bank the data array to read from. param i the index within the array where the data should be read. return the data element. return getElem(bank, i);
public double	getElemDouble(int i) Gets the data value from the first data array at the specified index and returns it as a double. param i the index within the array where the data should be read. return the data element. return getElem(i);
public float	getElemFloat(int bank, int i) Gets the float-type data value from the specified data array at the specified index. param bank the data array to read from. param i the index within the array where the data should be read. return the data element. return getElem(bank, i);
public float	getElemFloat(int i) Gets the data value from the first data array at the specified index and returns it as a float. param i the index within the array where the data should be read. return the data element. return getElem(0, i);
public int	getNumBanks() Gets the number of data arrays in this DataBuffer. return the number of data arrays. return banks;
public int	getOffset() Gets the offset corresponding to the first internal data array. return the offset. return offset;
public int[]	getOffsets() Gets the array giving the offsets corresponding to the internal data arrays. return the array of offsets. return offsets;
public int	getSize() Gets the size in bits of the primitive data type. return the size in bits of the primitive data type. return size;
void	notifyChanged() Notifies the listener that the data has changed. if (listener != null && !dataChanged) { dataChanged = true; listener.dataChanged(); }
void	notifyTaken() Notifies the listener that the data has been released. if (listener != null && !dataTaken) { dataTaken = true; listener.dataTaken(); }
void	releaseData() Release the data. if (listener != null && dataTaken) { dataTaken = false; listener.dataReleased(); }
void	removeDataBufferListener() Removes the data buffer listener. listener = null;
public abstract void	setElem(int bank, int i, int val) Sets the data value in the specified array at the specified index. param bank the internal array to the data to. param i the index within the array where the data should be written. param val the value to write into the array.
public void	setElem(int i, int val) Sets the data value in the first array at the specified index. param i the index within the array where the data should be written. param val the value to write into the array. setElem(0, i, val);
public void	setElemDouble(int i, double val) Sets the double data value in the first array at the specified index. param i the index within the array where the data should be written. param val the value to write into the array. setElemDouble(0, i, val);
public void	setElemDouble(int bank, int i, double val) Sets the double data value in the specified array at the specified index. param bank the internal array to the data to. param i the index within the array where the data should be written. param val the value to write into the array. setElem(bank, i, (int)val);
public void	setElemFloat(int i, float val) Sets the float data value in the first array at the specified index. param i the index within the array where the data should be written. param val the value to write into the array. setElemFloat(0, i, val);
public void	setElemFloat(int bank, int i, float val) Sets the float data value in the specified array at the specified index. param bank the internal array to the data to. param i the index within the array where the data should be written. param val the value to write into the array. setElem(bank, i, (int)val);
void	validate() Validate. dataChanged = false;