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/* * @(#)DataBufferByte.java 1.18 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*** COPYRIGHT (c) Eastman Kodak Company, 1997 *** As an unpublished work pursuant to Title 17 of the United *** States Code.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 bytes. * Values stored in the byte array(s) of this <CODE>DataBuffer</CODE> are treated as * unsigned values. */ public final class DataBufferByte extends DataBuffer { /** The default data bank. */ byte data[]; /** All data banks */ byte bankdata[][]; /** * Constructs a byte-based <CODE>DataBuffer</CODE> with a single bank and the * specified size. * * @param size The size of the <CODE>DataBuffer</CODE>. */ public DataBufferByte(int size) { super(TYPE_BYTE,size); data = new byte[size]; bankdata = new byte[1][]; bankdata[0] = data; } /** * Constructs a byte 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 DataBufferByte(int size, int numBanks) { super(TYPE_BYTE, size, numBanks); bankdata = new byte[numBanks][]; for (int i= 0; i < numBanks; i++) { bankdata[i] = new byte[size]; } data = bankdata[0]; } /** * Constructs a byte-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 byte array for the <CODE>DataBuffer</CODE>. * @param size The size of the <CODE>DataBuffer</CODE> bank. */ public DataBufferByte(byte dataArray[], int size) { super(TYPE_BYTE,size); data = dataArray; bankdata = new byte[1][]; bankdata[0] = data; } /** * Constructs a byte-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 byte 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>. <CODE>dataArray</CODE> * must have at least <CODE>offset</CODE> + <CODE>size</CODE> elements. */ public DataBufferByte(byte dataArray[], int size, int offset){ super(TYPE_BYTE,size,1,offset); data = dataArray; bankdata = new byte[1][]; bankdata[0] = data; } /** * Constructs a byte-based <CODE>DataBuffer</CODE> with the specified arrays. * The number of banks is 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 byte arrays for the <CODE>DataBuffer</CODE>. * @param size The size of the banks in the <CODE>DataBuffer</CODE>. */ public DataBufferByte(byte dataArray[][], int size) { super(TYPE_BYTE,size,dataArray.length); bankdata = (byte[][]) dataArray.clone(); data = bankdata[0]; } /** * Constructs a byte-based <CODE>DataBuffer</CODE> with the 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 <CODE>offset</CODE>. * There must be an entry in the <CODE>offset</CODE> 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 byte 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 DataBufferByte(byte dataArray[][], int size, int offsets[]) { super(TYPE_BYTE,size,dataArray.length,offsets); bankdata = (byte[][]) dataArray.clone(); data = bankdata[0]; } /** * Returns the default (first) byte data array. * * @return The first byte data array. */ public byte[] 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 byte[] getData(int bank) { return bankdata[bank]; } /** * Returns the data arrays for all banks. * @return All of the data arrays. */ public byte[][] getBankData() { return (byte[][]) 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]) & 0xff; } /** * 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]]) & 0xff; } /** * 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] = (byte)val; } /** * 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]] = (byte)val; } }