author | tvaleev |
Thu, 04 Oct 2018 12:40:55 -0700 | |
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parent 47216 | 71c04702a3d5 |
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/* |
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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 shorts. |
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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 DataBufferShort 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 a 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 DataBufferShort(int size) { |
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super(STABLE, TYPE_SHORT,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 a 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 DataBufferShort(int size, int numBanks) { |
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super(STABLE, TYPE_SHORT,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 a short-based {@code DataBuffer} with a single bank using the |
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* 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 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 DataBufferShort(short[] dataArray, int size) { |
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super(UNTRACKABLE, TYPE_SHORT, size); |
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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 a short-based {@code DataBuffer} with a single bank using the |
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* specified array, size, and offset. {@code dataArray} must have at least |
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* {@code offset} + {@code size} elements. Only elements {@code offset} |
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* through {@code offset} + {@code size} - 1 |
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* should 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 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 DataBufferShort(short[] dataArray, int size, int offset) { |
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super(UNTRACKABLE, TYPE_SHORT, size, 1, offset); |
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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 a 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 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 DataBufferShort(short[][] dataArray, int size) { |
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super(UNTRACKABLE, TYPE_SHORT, size, dataArray.length); |
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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 a short-based {@code DataBuffer} with the specified arrays, size, |
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* 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 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 DataBufferShort(short[][] dataArray, int size, int[] offsets) { |
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super(UNTRACKABLE, TYPE_SHORT, size, dataArray.length, offsets); |
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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) byte 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 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 (int)(data[i+offset]); |
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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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251 |
*/ |
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252 |
public int getElem(int bank, int i) { |
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return (int)(bankdata[bank][i+offsets[bank]]); |
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254 |
} |
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|
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256 |
/** |
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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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264 |
*/ |
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265 |
public void setElem(int i, int val) { |
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266 |
data[i+offset] = (short)val; |
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267 |
theTrackable.markDirty(); |
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268 |
} |
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270 |
/** |
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271 |
* 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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278 |
*/ |
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public void setElem(int bank, int i, int val) { |
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bankdata[bank][i+offsets[bank]] = (short)val; |
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281 |
theTrackable.markDirty(); |
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282 |
} |
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283 |
} |