| /* |
| * Copyright (c) 1997, 2017, 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. |
| */ |
| |
| /* **************************************************************** |
| ****************************************************************** |
| ****************************************************************** |
| *** 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| *** As an unpublished work pursuant to Title 17 of the United |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; |
| |
| import static sun.java2d.StateTrackable.State.*; |
| |
| /** |
| * This class extends {@code DataBuffer} and stores data internally as bytes. |
| * Values stored in the byte array(s) of this {@code DataBuffer} are treated as |
| * unsigned values. |
| * <p> |
| * <a id="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> |
| */ |
| public final class DataBufferByte extends DataBuffer |
| { |
| /** The default data bank. */ |
| byte data[]; |
| |
| /** All data banks */ |
| byte bankdata[][]; |
| |
| /** |
| * Constructs a byte-based {@code DataBuffer} with a single bank and the |
| * specified size. |
| * |
| * @param size The size of the {@code DataBuffer}. |
| */ |
| public DataBufferByte(int size) { |
| super(STABLE, TYPE_BYTE, size); |
| data = new byte[size]; |
| bankdata = new byte[1][]; |
| bankdata[0] = data; |
| } |
| |
| /** |
| * Constructs a byte based {@code DataBuffer} with the specified number of |
| * banks all of which are the specified size. |
| * |
| * @param size The size of the banks in the {@code DataBuffer}. |
| * @param numBanks The number of banks in the a {@code DataBuffer}. |
| */ |
| public DataBufferByte(int size, int numBanks) { |
| super(STABLE, 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} with a single bank using the |
| * specified array. |
| * Only the first {@code size} elements should be used by accessors of |
| * this {@code DataBuffer}. {@code dataArray} must be large enough to |
| * hold {@code size} 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 The byte array for the {@code DataBuffer}. |
| * @param size The size of the {@code DataBuffer} bank. |
| */ |
| public DataBufferByte(byte dataArray[], int size) { |
| super(UNTRACKABLE, TYPE_BYTE, size); |
| data = dataArray; |
| bankdata = new byte[1][]; |
| bankdata[0] = data; |
| } |
| |
| /** |
| * Constructs a byte-based {@code DataBuffer} with a single bank using the |
| * specified array, size, and offset. {@code dataArray} must have at least |
| * {@code offset} + {@code size} elements. Only elements {@code offset} |
| * through {@code offset} + {@code size} - 1 |
| * should be used by accessors of this {@code DataBuffer}. |
| * <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 The byte array for the {@code DataBuffer}. |
| * @param size The size of the {@code DataBuffer} bank. |
| * @param offset The offset into the {@code dataArray}. {@code dataArray} |
| * must have at least {@code offset} + {@code size} elements. |
| */ |
| public DataBufferByte(byte dataArray[], int size, int offset){ |
| super(UNTRACKABLE, TYPE_BYTE, size, 1, offset); |
| data = dataArray; |
| bankdata = new byte[1][]; |
| bankdata[0] = data; |
| } |
| |
| /** |
| * Constructs a byte-based {@code DataBuffer} with the specified arrays. |
| * The number of banks is equal to {@code dataArray.length}. |
| * Only the first {@code size} elements of each array should be used by |
| * accessors of this {@code DataBuffer}. |
| * <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 The byte arrays for the {@code DataBuffer}. |
| * @param size The size of the banks in the {@code DataBuffer}. |
| */ |
| public DataBufferByte(byte dataArray[][], int size) { |
| super(UNTRACKABLE, TYPE_BYTE, size, dataArray.length); |
| bankdata = dataArray.clone(); |
| data = bankdata[0]; |
| } |
| |
| /** |
| * Constructs a byte-based {@code DataBuffer} with the specified arrays, size, |
| * and offsets. |
| * The number of banks is equal to {@code dataArray.length}. Each array must |
| * be at least as large as {@code size} + the corresponding {@code offset}. |
| * There must be an entry in the {@code offset} array for each {@code dataArray} |
| * entry. For each bank, only elements {@code offset} through |
| * {@code offset} + {@code size} - 1 should be used by accessors of this |
| * {@code DataBuffer}. |
| * <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 The byte arrays for the {@code DataBuffer}. |
| * @param size The size of the banks in the {@code DataBuffer}. |
| * @param offsets The offsets into each array. |
| */ |
| public DataBufferByte(byte dataArray[][], int size, int offsets[]) { |
| super(UNTRACKABLE, TYPE_BYTE, size, dataArray.length, offsets); |
| bankdata = dataArray.clone(); |
| data = bankdata[0]; |
| } |
| |
| /** |
| * Returns the default (first) byte 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 byte data array. |
| */ |
| public byte[] 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 bank whose data array you want to get. |
| * @return The data array for the specified bank. |
| */ |
| public byte[] getData(int bank) { |
| theTrackable.setUntrackable(); |
| return bankdata[bank]; |
| } |
| |
| /** |
| * Returns the data arrays 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 of the data arrays. |
| */ |
| public byte[][] getBankData() { |
| theTrackable.setUntrackable(); |
| return 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; |
| theTrackable.markDirty(); |
| } |
| |
| /** |
| * 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; |
| theTrackable.markDirty(); |
| } |
| } |