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319 lines
12 KiB
Java
319 lines
12 KiB
Java
/*
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* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* ****************************************************************
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******************************************************************
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******************************************************************
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*** COPYRIGHT (c) Eastman Kodak Company, 1997
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*** As an unpublished work pursuant to Title 17 of the United
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*** States Code. All rights reserved.
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******************************************************************
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******************************************************************
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******************************************************************/
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package java.awt.image;
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import static sun.java2d.StateTrackable.State.*;
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/**
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* This class extends {@code DataBuffer} and stores data internally as
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* shorts. Values stored in the short array(s) of this {@code DataBuffer}
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* are treated as unsigned values.
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* <p>
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* <a id="optimizations">
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* Note that some implementations may function more efficiently
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* if they can maintain control over how the data for an image is
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* stored.
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* For example, optimizations such as caching an image in video
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* memory require that the implementation track all modifications
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* to that data.
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* Other implementations may operate better if they can store the
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* data in locations other than a Java array.
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* To maintain optimum compatibility with various optimizations
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* it is best to avoid constructors and methods which expose the
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* underlying storage as a Java array as noted below in the
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* documentation for those methods.
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* </a>
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*/
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public final class DataBufferUShort extends DataBuffer
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{
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/** The default data bank. */
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short[] data;
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/** All data banks */
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short[][] bankdata;
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/**
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* Constructs an unsigned-short based {@code DataBuffer} with a single bank and the
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* specified size.
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*
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* @param size The size of the {@code DataBuffer}.
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*/
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public DataBufferUShort(int size) {
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super(STABLE, TYPE_USHORT, size);
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data = new short[size];
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bankdata = new short[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs an unsigned-short based {@code DataBuffer} with the specified number of
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* banks, all of which are the specified size.
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*
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* @param size The size of the banks in the {@code DataBuffer}.
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* @param numBanks The number of banks in the a {@code DataBuffer}.
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*/
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public DataBufferUShort(int size, int numBanks) {
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super(STABLE, TYPE_USHORT, size, numBanks);
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bankdata = new short[numBanks][];
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for (int i= 0; i < numBanks; i++) {
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bankdata[i] = new short[size];
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}
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data = bankdata[0];
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}
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/**
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* Constructs an unsigned-short based {@code DataBuffer} with a single bank
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* using the specified array.
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* Only the first {@code size} elements should be used by accessors of
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* this {@code DataBuffer}. {@code dataArray} must be large enough to
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* hold {@code size} elements.
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* <p>
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* Note that {@code DataBuffer} objects created by this constructor
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* may be incompatible with <a href="#optimizations">performance
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* optimizations</a> used by some implementations (such as caching
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* an associated image in video memory).
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*
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* @param dataArray The unsigned-short array for the {@code DataBuffer}.
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* @param size The size of the {@code DataBuffer} bank.
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*/
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public DataBufferUShort(short[] dataArray, int size) {
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super(UNTRACKABLE, TYPE_USHORT, size);
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if (dataArray == null) {
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throw new NullPointerException("dataArray is null");
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}
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data = dataArray;
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bankdata = new short[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs an unsigned-short based {@code DataBuffer} with a single bank
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* using the specified array, size, and offset. {@code dataArray} must have at
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* least {@code offset} + {@code size} elements. Only elements
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* {@code offset} through {@code offset} + {@code size} - 1 should
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* be used by accessors of this {@code DataBuffer}.
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* <p>
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* Note that {@code DataBuffer} objects created by this constructor
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* may be incompatible with <a href="#optimizations">performance
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* optimizations</a> used by some implementations (such as caching
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* an associated image in video memory).
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*
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* @param dataArray The unsigned-short array for the {@code DataBuffer}.
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* @param size The size of the {@code DataBuffer} bank.
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* @param offset The offset into the {@code dataArray}.
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*/
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public DataBufferUShort(short[] dataArray, int size, int offset) {
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super(UNTRACKABLE, TYPE_USHORT, size, 1, offset);
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if (dataArray == null) {
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throw new NullPointerException("dataArray is null");
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}
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if ((size+offset) > dataArray.length) {
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throw new IllegalArgumentException("Length of dataArray is less "+
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" than size+offset.");
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}
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data = dataArray;
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bankdata = new short[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs an unsigned-short based {@code DataBuffer} with the specified arrays.
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* The number of banks will be equal to {@code dataArray.length}.
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* Only the first {@code size} elements of each array should be used by
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* accessors of this {@code DataBuffer}.
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* <p>
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* Note that {@code DataBuffer} objects created by this constructor
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* may be incompatible with <a href="#optimizations">performance
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* optimizations</a> used by some implementations (such as caching
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* an associated image in video memory).
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*
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* @param dataArray The unsigned-short arrays for the {@code DataBuffer}.
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* @param size The size of the banks in the {@code DataBuffer}.
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*/
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public DataBufferUShort(short[][] dataArray, int size) {
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super(UNTRACKABLE, TYPE_USHORT, size, dataArray.length);
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if (dataArray == null) {
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throw new NullPointerException("dataArray is null");
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}
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for (int i=0; i < dataArray.length; i++) {
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if (dataArray[i] == null) {
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throw new NullPointerException("dataArray["+i+"] is null");
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}
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}
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bankdata = dataArray.clone();
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data = bankdata[0];
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}
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/**
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* Constructs an unsigned-short based {@code DataBuffer} with specified arrays,
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* size, and offsets.
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* The number of banks is equal to {@code dataArray.length}. Each array must
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* be at least as large as {@code size} + the corresponding offset. There must
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* be an entry in the offset array for each {@code dataArray} entry. For each
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* bank, only elements {@code offset} through
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* {@code offset} + {@code size} - 1 should be
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* used by accessors of this {@code DataBuffer}.
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* <p>
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* Note that {@code DataBuffer} objects created by this constructor
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* may be incompatible with <a href="#optimizations">performance
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* optimizations</a> used by some implementations (such as caching
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* an associated image in video memory).
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*
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* @param dataArray The unsigned-short arrays for the {@code DataBuffer}.
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* @param size The size of the banks in the {@code DataBuffer}.
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* @param offsets The offsets into each array.
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*/
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public DataBufferUShort(short[][] dataArray, int size, int[] offsets) {
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super(UNTRACKABLE, TYPE_USHORT, size, dataArray.length, offsets);
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if (dataArray == null) {
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throw new NullPointerException("dataArray is null");
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}
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for (int i=0; i < dataArray.length; i++) {
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if (dataArray[i] == null) {
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throw new NullPointerException("dataArray["+i+"] is null");
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}
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if ((size+offsets[i]) > dataArray[i].length) {
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throw new IllegalArgumentException("Length of dataArray["+i+
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"] is less than size+"+
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"offsets["+i+"].");
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}
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}
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bankdata = dataArray.clone();
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data = bankdata[0];
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}
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/**
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* Returns the default (first) unsigned-short data array.
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* <p>
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* Note that calling this method may cause this {@code DataBuffer}
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* object to be incompatible with <a href="#optimizations">performance
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* optimizations</a> used by some implementations (such as caching
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* an associated image in video memory).
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*
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* @return The first unsigned-short data array.
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*/
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public short[] getData() {
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theTrackable.setUntrackable();
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return data;
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}
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/**
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* Returns the data array for the specified bank.
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* <p>
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* Note that calling this method may cause this {@code DataBuffer}
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* object to be incompatible with <a href="#optimizations">performance
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* optimizations</a> used by some implementations (such as caching
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* an associated image in video memory).
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*
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* @param bank The bank whose data array you want to get.
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* @return The data array for the specified bank.
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*/
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public short[] getData(int bank) {
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theTrackable.setUntrackable();
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return bankdata[bank];
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}
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/**
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* Returns the data arrays for all banks.
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* <p>
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* Note that calling this method may cause this {@code DataBuffer}
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* object to be incompatible with <a href="#optimizations">performance
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* optimizations</a> used by some implementations (such as caching
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* an associated image in video memory).
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*
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* @return All of the data arrays.
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*/
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public short[][] getBankData() {
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theTrackable.setUntrackable();
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return bankdata.clone();
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}
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/**
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* Returns the requested data array element from the first (default) bank.
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*
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* @param i The data array element you want to get.
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* @return The requested data array element as an integer.
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* @see #setElem(int, int)
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* @see #setElem(int, int, int)
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*/
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public int getElem(int i) {
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return data[i+offset]&0xffff;
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}
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/**
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* Returns the requested data array element from the specified bank.
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*
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* @param bank The bank from which you want to get a data array element.
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* @param i The data array element you want to get.
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* @return The requested data array element as an integer.
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* @see #setElem(int, int)
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* @see #setElem(int, int, int)
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*/
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public int getElem(int bank, int i) {
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return bankdata[bank][i+offsets[bank]]&0xffff;
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}
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/**
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* Sets the requested data array element in the first (default) bank
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* to the specified value.
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*
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* @param i The data array element you want to set.
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* @param val The integer value to which you want to set the data array element.
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* @see #getElem(int)
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* @see #getElem(int, int)
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*/
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public void setElem(int i, int val) {
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data[i+offset] = (short)(val&0xffff);
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theTrackable.markDirty();
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}
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/**
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* Sets the requested data array element in the specified bank
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* from the given integer.
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* @param bank The bank in which you want to set the data array element.
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* @param i The data array element you want to set.
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* @param val The integer value to which you want to set the specified data array element.
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* @see #getElem(int)
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* @see #getElem(int, int)
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*/
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public void setElem(int bank, int i, int val) {
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bankdata[bank][i+offsets[bank]] = (short)(val&0xffff);
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theTrackable.markDirty();
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}
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}
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