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	/*
	* Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package java.awt.image;

	import static sun.java2d.StateTrackable.State.*;

	/**
	* This class extends <code>DataBuffer</code> and stores data internally
	* in <code>double</code> form.
	* <p>
	* <a name="optimizations">
	* 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.
	* </a>
	*
	* @since 1.4
	*/

	public final class DataBufferDouble extends DataBuffer {

	/** The array of data banks. */
	double bankdata[][];

	/** A reference to the default data bank. */
	double data[];

	/**
	* Constructs a <code>double</code>-based <code>DataBuffer</code>
	* with a specified size.
	*
	* @param size The number of elements in the <code>DataBuffer</code>.
	*/
	public DataBufferDouble(int size) {
	super(STABLE, TYPE_DOUBLE, size);
	data = new double[size];
	bankdata = new double[1][];
	bankdata[0] = data;
	}

	/**
	* Constructs a <code>double</code>-based <code>DataBuffer</code>
	* with a specified number of banks, all of which are of a
	* specified size.
	*
	* @param size The number of elements in each bank of the
	* <code>DataBuffer</code>.
	* @param numBanks The number of banks in the <code>DataBuffer</code>.
	*/
	public DataBufferDouble(int size, int numBanks) {
	super(STABLE, TYPE_DOUBLE, size, numBanks);
	bankdata = new double[numBanks][];
	for (int i= 0; i < numBanks; i++) {
	bankdata[i] = new double[size];
	}
	data = bankdata[0];
	}

	/**
	* Constructs a <code>double</code>-based <code>DataBuffer</code>
	* with the specified data array. Only the first
	* <code>size</code> elements are available for use by this
	* <code>DataBuffer</code>. The array must be large enough to
	* hold <code>size</code> elements.
	* <p>
	* Note that {@code DataBuffer} objects created by this constructor
	* may be incompatible with <a href="#optimizations">performance
	* optimizations</a> used by some implementations (such as caching
	* an associated image in video memory).
	*
	* @param dataArray An array of <code>double</code>s to be used as the
	* first and only bank of this <code>DataBuffer</code>.
	* @param size The number of elements of the array to be used.
	*/
	public DataBufferDouble(double dataArray[], int size) {
	super(UNTRACKABLE, TYPE_DOUBLE, size);
	data = dataArray;
	bankdata = new double[1][];
	bankdata[0] = data;
	}

	/**
	* Constructs a <code>double</code>-based <code>DataBuffer</code>
	* with the specified data array. Only the elements between
	* <code>offset</code> and <code>offset + size - 1</code> are
	* available for use by this <code>DataBuffer</code>. The array
	* must be large enough to hold <code>offset + size</code> elements.
	* <p>
	* Note that {@code DataBuffer} objects created by this constructor
	* may be incompatible with <a href="#optimizations">performance
	* optimizations</a> used by some implementations (such as caching
	* an associated image in video memory).
	*
	* @param dataArray An array of <code>double</code>s to be used as the
	* first and only bank of this <code>DataBuffer</code>.
	* @param size The number of elements of the array to be used.
	* @param offset The offset of the first element of the array
	* that will be used.
	*/
	public DataBufferDouble(double dataArray[], int size, int offset) {
	super(UNTRACKABLE, TYPE_DOUBLE, size, 1, offset);
	data = dataArray;
	bankdata = new double[1][];
	bankdata[0] = data;
	}

	/**
	* Constructs a <code>double</code>-based <code>DataBuffer</code>
	* with the specified data arrays. Only the first
	* <code>size</code> elements of each array are available for use
	* by this <code>DataBuffer</code>. The number of banks will be
	* equal <code>to dataArray.length</code>.
	* <p>
	* Note that {@code DataBuffer} objects created by this constructor
	* may be incompatible with <a href="#optimizations">performance
	* optimizations</a> used by some implementations (such as caching
	* an associated image in video memory).
	*
	* @param dataArray An array of arrays of <code>double</code>s to be
	* used as the banks of this <code>DataBuffer</code>.
	* @param size The number of elements of each array to be used.
	*/
	public DataBufferDouble(double dataArray[][], int size) {
	super(UNTRACKABLE, TYPE_DOUBLE, size, dataArray.length);
	bankdata = (double[][]) dataArray.clone();
	data = bankdata[0];
	}

	/**
	* Constructs a <code>double</code>-based <code>DataBuffer</code>
	* 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 <code>size</code> plus the
	* corresponding offset. There must be an entry in the
	* <code>offsets</code> array for each data array.
	* <p>
	* Note that {@code DataBuffer} objects created by this constructor
	* may be incompatible with <a href="#optimizations">performance
	* optimizations</a> used by some implementations (such as caching
	* an associated image in video memory).
	*
	* @param dataArray An array of arrays of <code>double</code>s to be
	* used as the banks of this <code>DataBuffer</code>.
	* @param size The number of elements of each array to be used.
	* @param offsets An array of integer offsets, one for each bank.
	*/
	public DataBufferDouble(double dataArray[][], int size, int offsets[]) {
	super(UNTRACKABLE, TYPE_DOUBLE, size, dataArray.length, offsets);
	bankdata = (double[][]) dataArray.clone();
	data = bankdata[0];
	}

	/**
	* Returns the default (first) <code>double</code> data array.
	* <p>
	* Note that calling this method may cause this {@code DataBuffer}
	* object to be incompatible with <a href="#optimizations">performance
	* optimizations</a> used by some implementations (such as caching
	* an associated image in video memory).
	*
	* @return the first double data array.
	*/
	public double[] getData() {
	theTrackable.setUntrackable();
	return data;
	}

	/**
	* Returns the data array for the specified bank.
	* <p>
	* Note that calling this method may cause this {@code DataBuffer}
	* object to be incompatible with <a href="#optimizations">performance
	* optimizations</a> used by some implementations (such as caching
	* an associated image in video memory).
	*
	* @param bank the data array
	* @return the data array specified by <code>bank</code>.
	*/
	public double[] getData(int bank) {
	theTrackable.setUntrackable();
	return bankdata[bank];
	}

	/**
	* Returns the data array for all banks.
	* <p>
	* Note that calling this method may cause this {@code DataBuffer}
	* object to be incompatible with <a href="#optimizations">performance
	* optimizations</a> used by some implementations (such as caching
	* an associated image in video memory).
	*
	* @return all data arrays from this data buffer.
	*/
	public double[][] getBankData() {
	theTrackable.setUntrackable();
	return (double[][]) bankdata.clone();
	}

	/**
	* Returns the requested data array element from the first
	* (default) bank as an <code>int</code>.
	*
	* @param i The desired data array element.
	* @return The data entry as an <code>int</code>.
	* @see #setElem(int, int)
	* @see #setElem(int, int, int)
	*/
	public int getElem(int i) {
	return (int)(data[i+offset]);
	}

	/**
	* Returns the requested data array element from the specified
	* bank as an <code>int</code>.
	*
	* @param bank The bank number.
	* @param i The desired data array element.
	*
	* @return The data entry as an <code>int</code>.
	* @see #setElem(int, int)
	* @see #setElem(int, int, int)
	*/
	public int getElem(int bank, int i) {
	return (int)(bankdata[bank][i+offsets[bank]]);
	}

	/**
	* Sets the requested data array element in the first (default)
	* bank to the given <code>int</code>.
	*
	* @param i The desired data array element.
	* @param val The value to be set.
	* @see #getElem(int)
	* @see #getElem(int, int)
	*/
	public void setElem(int i, int val) {
	data[i+offset] = (double)val;
	theTrackable.markDirty();
	}

	/**
	* Sets the requested data array element in the specified bank
	* to the given <code>int</code>.
	*
	* @param bank The bank number.
	* @param i The desired data array element.
	* @param val The value to be set.
	* @see #getElem(int)
	* @see #getElem(int, int)
	*/
	public void setElem(int bank, int i, int val) {
	bankdata[bank][i+offsets[bank]] = (double)val;
	theTrackable.markDirty();
	}

	/**
	* Returns the requested data array element from the first
	* (default) bank as a <code>float</code>.
	*
	* @param i The desired data array element.
	*
	* @return The data entry as a <code>float</code>.
	* @see #setElemFloat(int, float)
	* @see #setElemFloat(int, int, float)
	*/
	public float getElemFloat(int i) {
	return (float)data[i+offset];
	}

	/**
	* Returns the requested data array element from the specified
	* bank as a <code>float</code>.
	*
	* @param bank The bank number.
	* @param i The desired data array element.
	*
	* @return The data entry as a <code>float</code>.
	* @see #setElemFloat(int, float)
	* @see #setElemFloat(int, int, float)
	*/
	public float getElemFloat(int bank, int i) {
	return (float)bankdata[bank][i+offsets[bank]];
	}

	/**
	* Sets the requested data array element in the first (default)
	* bank to the given <code>float</code>.
	*
	* @param i The desired data array element.
	* @param val The value to be set.
	* @see #getElemFloat(int)
	* @see #getElemFloat(int, int)
	*/
	public void setElemFloat(int i, float val) {
	data[i+offset] = (double)val;
	theTrackable.markDirty();
	}

	/**
	* Sets the requested data array element in the specified bank to
	* the given <code>float</code>.
	*
	* @param bank The bank number.
	* @param i The desired data array element.
	* @param val The value to be set.
	* @see #getElemFloat(int)
	* @see #getElemFloat(int, int)
	*/
	public void setElemFloat(int bank, int i, float val) {
	bankdata[bank][i+offsets[bank]] = (double)val;
	theTrackable.markDirty();
	}

	/**
	* Returns the requested data array element from the first
	* (default) bank as a <code>double</code>.
	*
	* @param i The desired data array element.
	*
	* @return The data entry as a <code>double</code>.
	* @see #setElemDouble(int, double)
	* @see #setElemDouble(int, int, double)
	*/
	public double getElemDouble(int i) {
	return data[i+offset];
	}

	/**
	* Returns the requested data array element from the specified
	* bank as a <code>double</code>.
	*
	* @param bank The bank number.
	* @param i The desired data array element.
	*
	* @return The data entry as a <code>double</code>.
	* @see #setElemDouble(int, double)
	* @see #setElemDouble(int, int, double)
	*/
	public double getElemDouble(int bank, int i) {
	return bankdata[bank][i+offsets[bank]];
	}

	/**
	* Sets the requested data array element in the first (default)
	* bank to the given <code>double</code>.
	*
	* @param i The desired data array element.
	* @param val The value to be set.
	* @see #getElemDouble(int)
	* @see #getElemDouble(int, int)
	*/
	public void setElemDouble(int i, double val) {
	data[i+offset] = val;
	theTrackable.markDirty();
	}

	/**
	* Sets the requested data array element in the specified bank to
	* the given <code>double</code>.
	*
	* @param bank The bank number.
	* @param i The desired data array element.
	* @param val The value to be set.
	* @see #getElemDouble(int)
	* @see #getElemDouble(int, int)
	*/
	public void setElemDouble(int bank, int i, double val) {
	bankdata[bank][i+offsets[bank]] = val;
	theTrackable.markDirty();
	}
	}

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