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/* * @(#)DataBufferUShort.java 1.14 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ /* **************************************************************** ****************************************************************** ****************************************************************** *** COPYRIGHT (c) Eastman Kodak Company, 1997 *** As an unpublished work pursuant to Title 17 of the United *** States Code. All rights reserved. ****************************************************************** ****************************************************************** ******************************************************************/ package java.awt.image; /** * This class extends <CODE>DataBuffer</CODE> and stores data internally as * shorts. Values stored in the short array(s) of this <CODE>DataBuffer</CODE> * are treated as unsigned values. */ public final class DataBufferUShort extends DataBuffer { /** The default data bank. */ short data[]; /** All data banks */ short bankdata[][]; /** * Constructs an unsigned-short based <CODE>DataBuffer</CODE> with a single bank and the * specified size. * * @param size The size of the <CODE>DataBuffer</CODE>. */ public DataBufferUShort(int size) { super(TYPE_USHORT,size); data = new short[size]; bankdata = new short[1][]; bankdata[0] = data; } /** * Constructs an unsigned-short based <CODE>DataBuffer</CODE> with the specified number of * banks, all of which are the specified size. * * @param size The size of the banks in the <CODE>DataBuffer</CODE>. * @param numBanks The number of banks in the a<CODE>DataBuffer</CODE>. */ public DataBufferUShort(int size, int numBanks) { super(TYPE_USHORT,size,numBanks); bankdata = new short[numBanks][]; for (int i= 0; i < numBanks; i++) { bankdata[i] = new short[size]; } data = bankdata[0]; } /** * Constructs an unsigned-short based <CODE>DataBuffer</CODE> with a single bank * using the specified array. * Only the first <CODE>size</CODE> elements should be used by accessors of * this <CODE>DataBuffer</CODE>. <CODE>dataArray</CODE> must be large enough to * hold <CODE>size</CODE> elements. * * @param dataArray The unsigned-short array for the <CODE>DataBuffer</CODE>. * @param size The size of the <CODE>DataBuffer</CODE> bank. */ public DataBufferUShort(short dataArray[], int size) { super(TYPE_USHORT,size); if (dataArray == null) { throw new NullPointerException("dataArray is null"); } data = dataArray; bankdata = new short[1][]; bankdata[0] = data; } /** * Constructs an unsigned-short based <CODE>DataBuffer</CODE> with a single bank * using the specified array, size, and offset. <CODE>dataArray</CODE> must have at * least <CODE>offset</CODE> + <CODE>size</CODE> elements. Only elements * <CODE>offset</CODE> through <CODE>offset</CODE> + <CODE>size</CODE> - 1 should * be used by accessors of this <CODE>DataBuffer</CODE>. * * @param dataArray The unsigned-short array for the <CODE>DataBuffer</CODE>. * @param size The size of the <CODE>DataBuffer</CODE> bank. * @param offset The offset into the <CODE>dataArray</CODE>. */ public DataBufferUShort(short dataArray[], int size, int offset) { super(TYPE_USHORT,size,1,offset); if (dataArray == null) { throw new NullPointerException("dataArray is null"); } if ((size+offset) > dataArray.length) { throw new IllegalArgumentException("Length of dataArray is less "+ " than size+offset."); } data = dataArray; bankdata = new short[1][]; bankdata[0] = data; } /** * Constructs an unsigned-short based <CODE>DataBuffer</CODE> with the specified arrays. * The number of banks will be equal to <CODE>dataArray.length</CODE>. * Only the first <CODE>size</CODE> elements of each array should be used by * accessors of this <CODE>DataBuffer</CODE>. * * @param dataArray The unsigned-short arrays for the <CODE>DataBuffer</CODE>. * @param size The size of the banks in the <CODE>DataBuffer</CODE>. */ public DataBufferUShort(short dataArray[][], int size) { super(TYPE_USHORT,size,dataArray.length); if (dataArray == null) { throw new NullPointerException("dataArray is null"); } for (int i=0; i < dataArray.length; i++) { if (dataArray[i] == null) { throw new NullPointerException("dataArray["+i+"] is null"); } } bankdata = (short[][]) dataArray.clone(); data = bankdata[0]; } /** * Constructs an unsigned-short based <CODE>DataBuffer</CODE> with specified arrays, * size, and offsets. * The number of banks is equal to <CODE>dataArray.length</CODE>. Each array must * be at least as large as <CODE>size</CODE> + the corresponding offset. There must * be an entry in the offset array for each <CODE>dataArray</CODE> entry. For each * bank, only elements <CODE>offset</CODE> through * <CODE>offset</CODE> + <CODE>size</CODE> - 1 should be * used by accessors of this <CODE>DataBuffer</CODE>. * * @param dataArray The unsigned-short arrays for the <CODE>DataBuffer</CODE>. * @param size The size of the banks in the <CODE>DataBuffer</CODE>. * @param offsets The offsets into each array. */ public DataBufferUShort(short dataArray[][], int size, int offsets[]) { super(TYPE_USHORT,size,dataArray.length,offsets); if (dataArray == null) { throw new NullPointerException("dataArray is null"); } for (int i=0; i < dataArray.length; i++) { if (dataArray[i] == null) { throw new NullPointerException("dataArray["+i+"] is null"); } if ((size+offsets[i]) > dataArray[i].length) { throw new IllegalArgumentException("Length of dataArray["+i+ "] is less than size+"+ "offsets["+i+"]."); } } bankdata = (short[][]) dataArray.clone(); data = bankdata[0]; } /** * Returns the default (first) unsigned-short data array. * * @return The first unsigned-short data array. */ public short[] getData() { return data; } /** * Returns the data array for the specified bank. * * @param bank The bank whose data array you want to get. * @return The data array for the specified bank. */ public short[] getData(int bank) { return bankdata[bank]; } /** * Returns the data arrays for all banks. * @return All of the data arrays. */ public short[][] getBankData() { return (short[][]) bankdata.clone(); } /** * Returns the requested data array element from the first (default) bank. * * @param i The data array element you want to get. * @return The requested data array element as an integer. * @see #setElem(int, int) * @see #setElem(int, int, int) */ public int getElem(int i) { return (int)(data[i+offset]&0xffff); } /** * Returns the requested data array element from the specified bank. * * @param bank The bank from which you want to get a data array element. * @param i The data array element you want to get. * @return The requested data array element as an integer. * @see #setElem(int, int) * @see #setElem(int, int, int) */ public int getElem(int bank, int i) { return (int)(bankdata[bank][i+offsets[bank]]&0xffff); } /** * Sets the requested data array element in the first (default) bank * to the specified value. * * @param i The data array element you want to set. * @param val The integer value to which you want to set the data array element. * @see #getElem(int) * @see #getElem(int, int) */ public void setElem(int i, int val) { data[i+offset] = (short)(val&0xffff); } /** * Sets the requested data array element in the specified bank * from the given integer. * @param bank The bank in which you want to set the data array element. * @param i The data array element you want to set. * @param val The integer value to which you want to set the specified data array element. * @see #getElem(int) * @see #getElem(int, int) */ public void setElem(int bank, int i, int val) { bankdata[bank][i+offsets[bank]] = (short)(val&0xffff); } }