1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
41 * This class extends {@code DataBuffer} and stores data internally as shorts.
42 * <p>
43 * <a id="optimizations">
44 * Note that some implementations may function more efficiently
45 * if they can maintain control over how the data for an image is
46 * stored.
47 * For example, optimizations such as caching an image in video
48 * memory require that the implementation track all modifications
49 * to that data.
50 * Other implementations may operate better if they can store the
51 * data in locations other than a Java array.
52 * To maintain optimum compatibility with various optimizations
53 * it is best to avoid constructors and methods which expose the
54 * underlying storage as a Java array as noted below in the
55 * documentation for those methods.
56 * </a>
57 */
58 public final class DataBufferShort extends DataBuffer
59 {
60 /** The default data bank. */
61 short data[];
62
63 /** All data banks */
64 short bankdata[][];
65
66 /**
67 * Constructs a short-based {@code DataBuffer} with a single bank and the
68 * specified size.
69 *
70 * @param size The size of the {@code DataBuffer}.
71 */
72 public DataBufferShort(int size) {
73 super(STABLE, TYPE_SHORT,size);
74 data = new short[size];
75 bankdata = new short[1][];
76 bankdata[0] = data;
77 }
78
79 /**
80 * Constructs a short-based {@code DataBuffer} with the specified number of
81 * banks all of which are the specified size.
82 *
83 * @param size The size of the banks in the {@code DataBuffer}.
84 * @param numBanks The number of banks in the a {@code DataBuffer}.
90 bankdata[i] = new short[size];
91 }
92 data = bankdata[0];
93 }
94
95 /**
96 * Constructs a short-based {@code DataBuffer} with a single bank using the
97 * specified array.
98 * Only the first {@code size} elements should be used by accessors of
99 * this {@code DataBuffer}. {@code dataArray} must be large enough to
100 * hold {@code size} elements.
101 * <p>
102 * Note that {@code DataBuffer} objects created by this constructor
103 * may be incompatible with <a href="#optimizations">performance
104 * optimizations</a> used by some implementations (such as caching
105 * an associated image in video memory).
106 *
107 * @param dataArray The short array for the {@code DataBuffer}.
108 * @param size The size of the {@code DataBuffer} bank.
109 */
110 public DataBufferShort(short dataArray[], int size) {
111 super(UNTRACKABLE, TYPE_SHORT, size);
112 data = dataArray;
113 bankdata = new short[1][];
114 bankdata[0] = data;
115 }
116
117 /**
118 * Constructs a short-based {@code DataBuffer} with a single bank using the
119 * specified array, size, and offset. {@code dataArray} must have at least
120 * {@code offset} + {@code size} elements. Only elements {@code offset}
121 * through {@code offset} + {@code size} - 1
122 * should be used by accessors of this {@code DataBuffer}.
123 * <p>
124 * Note that {@code DataBuffer} objects created by this constructor
125 * may be incompatible with <a href="#optimizations">performance
126 * optimizations</a> used by some implementations (such as caching
127 * an associated image in video memory).
128 *
129 * @param dataArray The short array for the {@code DataBuffer}.
130 * @param size The size of the {@code DataBuffer} bank.
131 * @param offset The offset into the {@code dataArray}.
132 */
133 public DataBufferShort(short dataArray[], int size, int offset) {
134 super(UNTRACKABLE, TYPE_SHORT, size, 1, offset);
135 data = dataArray;
136 bankdata = new short[1][];
137 bankdata[0] = data;
138 }
139
140 /**
141 * Constructs a short-based {@code DataBuffer} with the specified arrays.
142 * The number of banks will be equal to {@code dataArray.length}.
143 * Only the first {@code size} elements of each array should be used by
144 * accessors of this {@code DataBuffer}.
145 * <p>
146 * Note that {@code DataBuffer} objects created by this constructor
147 * may be incompatible with <a href="#optimizations">performance
148 * optimizations</a> used by some implementations (such as caching
149 * an associated image in video memory).
150 *
151 * @param dataArray The short arrays for the {@code DataBuffer}.
152 * @param size The size of the banks in the {@code DataBuffer}.
153 */
154 public DataBufferShort(short dataArray[][], int size) {
155 super(UNTRACKABLE, TYPE_SHORT, size, dataArray.length);
156 bankdata = dataArray.clone();
157 data = bankdata[0];
158 }
159
160 /**
161 * Constructs a short-based {@code DataBuffer} with the specified arrays, size,
162 * and offsets.
163 * The number of banks is equal to {@code dataArray.length}. Each array must
164 * be at least as large as {@code size} + the corresponding offset. There must
165 * be an entry in the offset array for each {@code dataArray} entry. For each
166 * bank, only elements {@code offset} through
167 * {@code offset} + {@code size} - 1 should be
168 * used by accessors of this {@code DataBuffer}.
169 * <p>
170 * Note that {@code DataBuffer} objects created by this constructor
171 * may be incompatible with <a href="#optimizations">performance
172 * optimizations</a> used by some implementations (such as caching
173 * an associated image in video memory).
174 *
175 * @param dataArray The short arrays for the {@code DataBuffer}.
176 * @param size The size of the banks in the {@code DataBuffer}.
177 * @param offsets The offsets into each array.
178 */
179 public DataBufferShort(short dataArray[][], int size, int offsets[]) {
180 super(UNTRACKABLE, TYPE_SHORT, size, dataArray.length, offsets);
181 bankdata = dataArray.clone();
182 data = bankdata[0];
183 }
184
185 /**
186 * Returns the default (first) byte data array.
187 * <p>
188 * Note that calling this method may cause this {@code DataBuffer}
189 * object to be incompatible with <a href="#optimizations">performance
190 * optimizations</a> used by some implementations (such as caching
191 * an associated image in video memory).
192 *
193 * @return The first short data array.
194 */
195 public short[] getData() {
196 theTrackable.setUntrackable();
197 return data;
198 }
199
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1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
41 * This class extends {@code DataBuffer} and stores data internally as shorts.
42 * <p>
43 * <a id="optimizations">
44 * Note that some implementations may function more efficiently
45 * if they can maintain control over how the data for an image is
46 * stored.
47 * For example, optimizations such as caching an image in video
48 * memory require that the implementation track all modifications
49 * to that data.
50 * Other implementations may operate better if they can store the
51 * data in locations other than a Java array.
52 * To maintain optimum compatibility with various optimizations
53 * it is best to avoid constructors and methods which expose the
54 * underlying storage as a Java array as noted below in the
55 * documentation for those methods.
56 * </a>
57 */
58 public final class DataBufferShort extends DataBuffer
59 {
60 /** The default data bank. */
61 short[] data;
62
63 /** All data banks */
64 short[][] bankdata;
65
66 /**
67 * Constructs a short-based {@code DataBuffer} with a single bank and the
68 * specified size.
69 *
70 * @param size The size of the {@code DataBuffer}.
71 */
72 public DataBufferShort(int size) {
73 super(STABLE, TYPE_SHORT,size);
74 data = new short[size];
75 bankdata = new short[1][];
76 bankdata[0] = data;
77 }
78
79 /**
80 * Constructs a short-based {@code DataBuffer} with the specified number of
81 * banks all of which are the specified size.
82 *
83 * @param size The size of the banks in the {@code DataBuffer}.
84 * @param numBanks The number of banks in the a {@code DataBuffer}.
90 bankdata[i] = new short[size];
91 }
92 data = bankdata[0];
93 }
94
95 /**
96 * Constructs a short-based {@code DataBuffer} with a single bank using the
97 * specified array.
98 * Only the first {@code size} elements should be used by accessors of
99 * this {@code DataBuffer}. {@code dataArray} must be large enough to
100 * hold {@code size} elements.
101 * <p>
102 * Note that {@code DataBuffer} objects created by this constructor
103 * may be incompatible with <a href="#optimizations">performance
104 * optimizations</a> used by some implementations (such as caching
105 * an associated image in video memory).
106 *
107 * @param dataArray The short array for the {@code DataBuffer}.
108 * @param size The size of the {@code DataBuffer} bank.
109 */
110 public DataBufferShort(short[] dataArray, int size) {
111 super(UNTRACKABLE, TYPE_SHORT, size);
112 data = dataArray;
113 bankdata = new short[1][];
114 bankdata[0] = data;
115 }
116
117 /**
118 * Constructs a short-based {@code DataBuffer} with a single bank using the
119 * specified array, size, and offset. {@code dataArray} must have at least
120 * {@code offset} + {@code size} elements. Only elements {@code offset}
121 * through {@code offset} + {@code size} - 1
122 * should be used by accessors of this {@code DataBuffer}.
123 * <p>
124 * Note that {@code DataBuffer} objects created by this constructor
125 * may be incompatible with <a href="#optimizations">performance
126 * optimizations</a> used by some implementations (such as caching
127 * an associated image in video memory).
128 *
129 * @param dataArray The short array for the {@code DataBuffer}.
130 * @param size The size of the {@code DataBuffer} bank.
131 * @param offset The offset into the {@code dataArray}.
132 */
133 public DataBufferShort(short[] dataArray, int size, int offset) {
134 super(UNTRACKABLE, TYPE_SHORT, size, 1, offset);
135 data = dataArray;
136 bankdata = new short[1][];
137 bankdata[0] = data;
138 }
139
140 /**
141 * Constructs a short-based {@code DataBuffer} with the specified arrays.
142 * The number of banks will be equal to {@code dataArray.length}.
143 * Only the first {@code size} elements of each array should be used by
144 * accessors of this {@code DataBuffer}.
145 * <p>
146 * Note that {@code DataBuffer} objects created by this constructor
147 * may be incompatible with <a href="#optimizations">performance
148 * optimizations</a> used by some implementations (such as caching
149 * an associated image in video memory).
150 *
151 * @param dataArray The short arrays for the {@code DataBuffer}.
152 * @param size The size of the banks in the {@code DataBuffer}.
153 */
154 public DataBufferShort(short[][] dataArray, int size) {
155 super(UNTRACKABLE, TYPE_SHORT, size, dataArray.length);
156 bankdata = dataArray.clone();
157 data = bankdata[0];
158 }
159
160 /**
161 * Constructs a short-based {@code DataBuffer} with the specified arrays, size,
162 * and offsets.
163 * The number of banks is equal to {@code dataArray.length}. Each array must
164 * be at least as large as {@code size} + the corresponding offset. There must
165 * be an entry in the offset array for each {@code dataArray} entry. For each
166 * bank, only elements {@code offset} through
167 * {@code offset} + {@code size} - 1 should be
168 * used by accessors of this {@code DataBuffer}.
169 * <p>
170 * Note that {@code DataBuffer} objects created by this constructor
171 * may be incompatible with <a href="#optimizations">performance
172 * optimizations</a> used by some implementations (such as caching
173 * an associated image in video memory).
174 *
175 * @param dataArray The short arrays for the {@code DataBuffer}.
176 * @param size The size of the banks in the {@code DataBuffer}.
177 * @param offsets The offsets into each array.
178 */
179 public DataBufferShort(short[][] dataArray, int size, int[] offsets) {
180 super(UNTRACKABLE, TYPE_SHORT, size, dataArray.length, offsets);
181 bankdata = dataArray.clone();
182 data = bankdata[0];
183 }
184
185 /**
186 * Returns the default (first) byte data array.
187 * <p>
188 * Note that calling this method may cause this {@code DataBuffer}
189 * object to be incompatible with <a href="#optimizations">performance
190 * optimizations</a> used by some implementations (such as caching
191 * an associated image in video memory).
192 *
193 * @return The first short data array.
194 */
195 public short[] getData() {
196 theTrackable.setUntrackable();
197 return data;
198 }
199
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