290N/A/*
2362N/A * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
290N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
290N/A *
290N/A * This code is free software; you can redistribute it and/or modify it
290N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
290N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
290N/A *
290N/A * This code is distributed in the hope that it will be useful, but WITHOUT
290N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
290N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
290N/A * version 2 for more details (a copy is included in the LICENSE file that
290N/A * accompanied this code).
290N/A *
290N/A * You should have received a copy of the GNU General Public License version
290N/A * 2 along with this work; if not, write to the Free Software Foundation,
290N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
290N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
290N/A */
290N/A
290N/A/* ****************************************************************
290N/A ******************************************************************
290N/A ******************************************************************
290N/A *** COPYRIGHT (c) Eastman Kodak Company, 1997
290N/A *** As an unpublished work pursuant to Title 17 of the United
290N/A *** States Code. All rights reserved.
290N/A ******************************************************************
290N/A ******************************************************************
290N/A ******************************************************************/
290N/A
290N/Apackage java.awt.image;
290N/A
290N/Aimport static sun.java2d.StateTrackable.State.*;
290N/A
290N/A/**
290N/A * This class extends <CODE>DataBuffer</CODE> and stores data internally as bytes.
290N/A * Values stored in the byte array(s) of this <CODE>DataBuffer</CODE> are treated as
290N/A * unsigned values.
290N/A * <p>
290N/A * <a name="optimizations">
290N/A * Note that some implementations may function more efficiently
290N/A * if they can maintain control over how the data for an image is
290N/A * stored.
290N/A * For example, optimizations such as caching an image in video
290N/A * memory require that the implementation track all modifications
290N/A * to that data.
290N/A * Other implementations may operate better if they can store the
290N/A * data in locations other than a Java array.
290N/A * To maintain optimum compatibility with various optimizations
290N/A * it is best to avoid constructors and methods which expose the
290N/A * underlying storage as a Java array, as noted below in the
290N/A * documentation for those methods.
290N/A * </a>
290N/A */
290N/Apublic final class DataBufferByte extends DataBuffer
290N/A{
290N/A /** The default data bank. */
290N/A byte data[];
290N/A
290N/A /** All data banks */
290N/A byte bankdata[][];
290N/A
290N/A /**
290N/A * Constructs a byte-based <CODE>DataBuffer</CODE> with a single bank and the
290N/A * specified size.
290N/A *
290N/A * @param size The size of the <CODE>DataBuffer</CODE>.
290N/A */
290N/A public DataBufferByte(int size) {
290N/A super(STABLE, TYPE_BYTE, size);
290N/A data = new byte[size];
290N/A bankdata = new byte[1][];
290N/A bankdata[0] = data;
290N/A }
290N/A
290N/A /**
290N/A * Constructs a byte based <CODE>DataBuffer</CODE> with the specified number of
290N/A * banks all of which are the specified size.
290N/A *
290N/A * @param size The size of the banks in the <CODE>DataBuffer</CODE>.
290N/A * @param numBanks The number of banks in the a<CODE>DataBuffer</CODE>.
290N/A */
290N/A public DataBufferByte(int size, int numBanks) {
290N/A super(STABLE, TYPE_BYTE, size, numBanks);
290N/A bankdata = new byte[numBanks][];
290N/A for (int i= 0; i < numBanks; i++) {
290N/A bankdata[i] = new byte[size];
290N/A }
290N/A data = bankdata[0];
290N/A }
290N/A
290N/A /**
290N/A * Constructs a byte-based <CODE>DataBuffer</CODE> with a single bank using the
290N/A * specified array.
290N/A * Only the first <CODE>size</CODE> elements should be used by accessors of
290N/A * this <CODE>DataBuffer</CODE>. <CODE>dataArray</CODE> must be large enough to
290N/A * hold <CODE>size</CODE> elements.
290N/A * <p>
290N/A * Note that {@code DataBuffer} objects created by this constructor
290N/A * may be incompatible with <a href="#optimizations">performance
290N/A * optimizations</a> used by some implementations (such as caching
290N/A * an associated image in video memory).
290N/A *
290N/A * @param dataArray The byte array for the <CODE>DataBuffer</CODE>.
290N/A * @param size The size of the <CODE>DataBuffer</CODE> bank.
290N/A */
290N/A public DataBufferByte(byte dataArray[], int size) {
290N/A super(UNTRACKABLE, TYPE_BYTE, size);
290N/A data = dataArray;
290N/A bankdata = new byte[1][];
290N/A bankdata[0] = data;
290N/A }
290N/A
290N/A /**
290N/A * Constructs a byte-based <CODE>DataBuffer</CODE> with a single bank using the
290N/A * specified array, size, and offset. <CODE>dataArray</CODE> must have at least
290N/A * <CODE>offset</CODE> + <CODE>size</CODE> elements. Only elements <CODE>offset</CODE>
290N/A * through <CODE>offset</CODE> + <CODE>size</CODE> - 1
290N/A * should be used by accessors of this <CODE>DataBuffer</CODE>.
290N/A * <p>
290N/A * Note that {@code DataBuffer} objects created by this constructor
290N/A * may be incompatible with <a href="#optimizations">performance
290N/A * optimizations</a> used by some implementations (such as caching
290N/A * an associated image in video memory).
290N/A *
290N/A * @param dataArray The byte array for the <CODE>DataBuffer</CODE>.
290N/A * @param size The size of the <CODE>DataBuffer</CODE> bank.
290N/A * @param offset The offset into the <CODE>dataArray</CODE>. <CODE>dataArray</CODE>
290N/A * must have at least <CODE>offset</CODE> + <CODE>size</CODE> elements.
290N/A */
290N/A public DataBufferByte(byte dataArray[], int size, int offset){
290N/A super(UNTRACKABLE, TYPE_BYTE, size, 1, offset);
290N/A data = dataArray;
290N/A bankdata = new byte[1][];
290N/A bankdata[0] = data;
290N/A }
290N/A
290N/A /**
290N/A * Constructs a byte-based <CODE>DataBuffer</CODE> with the specified arrays.
290N/A * The number of banks is equal to <CODE>dataArray.length</CODE>.
290N/A * Only the first <CODE>size</CODE> elements of each array should be used by
290N/A * accessors of this <CODE>DataBuffer</CODE>.
290N/A * <p>
290N/A * Note that {@code DataBuffer} objects created by this constructor
290N/A * may be incompatible with <a href="#optimizations">performance
290N/A * optimizations</a> used by some implementations (such as caching
290N/A * an associated image in video memory).
290N/A *
290N/A * @param dataArray The byte arrays for the <CODE>DataBuffer</CODE>.
290N/A * @param size The size of the banks in the <CODE>DataBuffer</CODE>.
290N/A */
290N/A public DataBufferByte(byte dataArray[][], int size) {
290N/A super(UNTRACKABLE, TYPE_BYTE, size, dataArray.length);
290N/A bankdata = (byte[][]) dataArray.clone();
290N/A data = bankdata[0];
290N/A }
290N/A
290N/A /**
290N/A * Constructs a byte-based <CODE>DataBuffer</CODE> with the specified arrays, size,
290N/A * and offsets.
290N/A * The number of banks is equal to <CODE>dataArray.length</CODE>. Each array must
290N/A * be at least as large as <CODE>size</CODE> + the corresponding <CODE>offset</CODE>.
290N/A * There must be an entry in the <CODE>offset</CODE> array for each <CODE>dataArray</CODE>
290N/A * entry. For each bank, only elements <CODE>offset</CODE> through
290N/A * <CODE>offset</CODE> + <CODE>size</CODE> - 1 should be used by accessors of this
290N/A * <CODE>DataBuffer</CODE>.
290N/A * <p>
290N/A * Note that {@code DataBuffer} objects created by this constructor
290N/A * may be incompatible with <a href="#optimizations">performance
290N/A * optimizations</a> used by some implementations (such as caching
290N/A * an associated image in video memory).
290N/A *
290N/A * @param dataArray The byte arrays for the <CODE>DataBuffer</CODE>.
290N/A * @param size The size of the banks in the <CODE>DataBuffer</CODE>.
290N/A * @param offsets The offsets into each array.
290N/A */
290N/A public DataBufferByte(byte dataArray[][], int size, int offsets[]) {
290N/A super(UNTRACKABLE, TYPE_BYTE, size, dataArray.length, offsets);
290N/A bankdata = (byte[][]) dataArray.clone();
290N/A data = bankdata[0];
290N/A }
290N/A
290N/A /**
290N/A * Returns the default (first) byte data array.
290N/A * <p>
290N/A * Note that calling this method may cause this {@code DataBuffer}
290N/A * object to be incompatible with <a href="#optimizations">performance
290N/A * optimizations</a> used by some implementations (such as caching
290N/A * an associated image in video memory).
290N/A *
290N/A * @return The first byte data array.
290N/A */
290N/A public byte[] getData() {
290N/A theTrackable.setUntrackable();
290N/A return data;
290N/A }
290N/A
290N/A /**
290N/A * Returns the data array for the specified bank.
290N/A * <p>
290N/A * Note that calling this method may cause this {@code DataBuffer}
290N/A * object to be incompatible with <a href="#optimizations">performance
290N/A * optimizations</a> used by some implementations (such as caching
290N/A * an associated image in video memory).
290N/A *
290N/A * @param bank The bank whose data array you want to get.
290N/A * @return The data array for the specified bank.
290N/A */
290N/A public byte[] getData(int bank) {
290N/A theTrackable.setUntrackable();
290N/A return bankdata[bank];
290N/A }
290N/A
290N/A /**
290N/A * Returns the data arrays for all banks.
290N/A * <p>
290N/A * Note that calling this method may cause this {@code DataBuffer}
290N/A * object to be incompatible with <a href="#optimizations">performance
290N/A * optimizations</a> used by some implementations (such as caching
290N/A * an associated image in video memory).
290N/A *
290N/A * @return All of the data arrays.
290N/A */
290N/A public byte[][] getBankData() {
290N/A theTrackable.setUntrackable();
290N/A return (byte[][]) bankdata.clone();
290N/A }
290N/A
290N/A /**
290N/A * Returns the requested data array element from the first (default) bank.
290N/A *
290N/A * @param i The data array element you want to get.
290N/A * @return The requested data array element as an integer.
290N/A * @see #setElem(int, int)
290N/A * @see #setElem(int, int, int)
290N/A */
290N/A public int getElem(int i) {
290N/A return (int)(data[i+offset]) & 0xff;
290N/A }
290N/A
290N/A /**
290N/A * Returns the requested data array element from the specified bank.
290N/A *
290N/A * @param bank The bank from which you want to get a data array element.
290N/A * @param i The data array element you want to get.
290N/A * @return The requested data array element as an integer.
290N/A * @see #setElem(int, int)
290N/A * @see #setElem(int, int, int)
290N/A */
290N/A public int getElem(int bank, int i) {
290N/A return (int)(bankdata[bank][i+offsets[bank]]) & 0xff;
290N/A }
290N/A
290N/A /**
290N/A * Sets the requested data array element in the first (default) bank
290N/A * to the specified value.
290N/A *
290N/A * @param i The data array element you want to set.
290N/A * @param val The integer value to which you want to set the data array element.
290N/A * @see #getElem(int)
290N/A * @see #getElem(int, int)
290N/A */
290N/A public void setElem(int i, int val) {
290N/A data[i+offset] = (byte)val;
290N/A theTrackable.markDirty();
290N/A }
290N/A
290N/A /**
290N/A * Sets the requested data array element in the specified bank
290N/A * from the given integer.
290N/A * @param bank The bank in which you want to set the data array element.
290N/A * @param i The data array element you want to set.
290N/A * @param val The integer value to which you want to set the specified data array element.
290N/A * @see #getElem(int)
290N/A * @see #getElem(int, int)
290N/A */
290N/A public void setElem(int bank, int i, int val) {
290N/A bankdata[bank][i+offsets[bank]] = (byte)val;
290N/A theTrackable.markDirty();
290N/A }
290N/A}