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407 lines
14 KiB
Java
407 lines
14 KiB
Java
/*
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* Copyright (c) 2000, 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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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
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* in {@code float} form.
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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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* @since 1.4
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*/
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public final class DataBufferFloat extends DataBuffer {
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/** The array of data banks. */
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float[][] bankdata;
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/** A reference to the default data bank. */
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float[] data;
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/**
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* Constructs a {@code float}-based {@code DataBuffer}
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* with a specified size.
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*
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* @param size The number of elements in the DataBuffer.
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*/
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public DataBufferFloat(int size) {
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super(STABLE, TYPE_FLOAT, size);
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data = new float[size];
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bankdata = new float[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs a {@code float}-based {@code DataBuffer}
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* with a specified number of banks, all of which are of a
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* specified size.
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*
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* @param size The number of elements in each bank of the
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* {@code DataBuffer}.
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* @param numBanks The number of banks in the
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* {@code DataBuffer}.
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*/
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public DataBufferFloat(int size, int numBanks) {
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super(STABLE, TYPE_FLOAT, size, numBanks);
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bankdata = new float[numBanks][];
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for (int i= 0; i < numBanks; i++) {
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bankdata[i] = new float[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 {@code float}-based {@code DataBuffer}
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* with the specified data array. Only the first
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* {@code size} elements are available for use by this
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* {@code DataBuffer}. The array 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 An array of {@code float}s to be used as the
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* first and only bank of this {@code DataBuffer}.
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* @param size The number of elements of the array to be used.
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*/
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public DataBufferFloat(float[] dataArray, int size) {
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super(UNTRACKABLE, TYPE_FLOAT, size);
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data = dataArray;
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bankdata = new float[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs a {@code float}-based {@code DataBuffer}
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* with the specified data array. Only the elements between
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* {@code offset} and {@code offset + size - 1} are
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* available for use by this {@code DataBuffer}. The array
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* must be large enough to hold {@code offset + size}
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* 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 An array of {@code float}s to be used as the
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* first and only bank of this {@code DataBuffer}.
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* @param size The number of elements of the array to be used.
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* @param offset The offset of the first element of the array
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* that will be used.
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*/
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public DataBufferFloat(float[] dataArray, int size, int offset) {
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super(UNTRACKABLE, TYPE_FLOAT, size, 1, offset);
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data = dataArray;
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bankdata = new float[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs a {@code float}-based {@code DataBuffer}
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* with the specified data arrays. Only the first
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* {@code size} elements of each array are available for use
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* by this {@code DataBuffer}. The number of banks will be
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* equal to {@code dataArray.length}.
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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 An array of arrays of {@code float}s to be
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* used as the banks of this {@code DataBuffer}.
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* @param size The number of elements of each array to be used.
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*/
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public DataBufferFloat(float[][] dataArray, int size) {
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super(UNTRACKABLE, TYPE_FLOAT, 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 {@code float}-based {@code DataBuffer}
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* with the specified data arrays, size, and per-bank offsets.
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* The number of banks is equal to {@code dataArray.length}.
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* Each array must be at least as large as {@code size} plus the
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* corresponding offset. There must be an entry in the offsets
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* array for each data array.
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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 An array of arrays of {@code float}s to be
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* used as the banks of this {@code DataBuffer}.
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* @param size The number of elements of each array to be used.
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* @param offsets An array of integer offsets, one for each bank.
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*/
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public DataBufferFloat(float[][] dataArray, int size, int[] offsets) {
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super(UNTRACKABLE, TYPE_FLOAT, 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) {@code float} 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 float data array.
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*/
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public float[] 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 data array
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* @return the data array specified by {@code bank}.
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*/
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public float[] 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 array 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 data arrays for this data buffer.
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*/
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public float[][] 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
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* (default) bank as an {@code int}.
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*
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* @param i The desired data array element.
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*
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* @return The data entry as an {@code int}.
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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
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* bank as an {@code int}.
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*
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* @param bank The bank number.
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* @param i The desired data array element.
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*
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* @return The data entry as an {@code int}.
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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 (int)(bankdata[bank][i+offsets[bank]]);
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}
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/**
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* Sets the requested data array element in the first (default)
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* bank to the given {@code int}.
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*
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* @param i The desired data array element.
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* @param val The value to be set.
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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] = (float)val;
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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 to
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* the given {@code int}.
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*
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* @param bank The bank number.
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* @param i The desired data array element.
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* @param val The value to be set.
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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]] = (float)val;
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theTrackable.markDirty();
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}
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/**
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* Returns the requested data array element from the first
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* (default) bank as a {@code float}.
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*
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* @param i The desired data array element.
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*
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* @return The data entry as a {@code float}.
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* @see #setElemFloat(int, float)
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* @see #setElemFloat(int, int, float)
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*/
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public float getElemFloat(int i) {
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return data[i+offset];
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}
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/**
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* Returns the requested data array element from the specified
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* bank as a {@code float}.
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*
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* @param bank The bank number.
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* @param i The desired data array element.
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*
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* @return The data entry as a {@code float}.
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* @see #setElemFloat(int, float)
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* @see #setElemFloat(int, int, float)
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*/
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public float getElemFloat(int bank, int i) {
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return bankdata[bank][i+offsets[bank]];
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}
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/**
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* Sets the requested data array element in the first (default)
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* bank to the given {@code float}.
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*
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* @param i The desired data array element.
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* @param val The value to be set.
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* @see #getElemFloat(int)
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* @see #getElemFloat(int, int)
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*/
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public void setElemFloat(int i, float val) {
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data[i+offset] = val;
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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 to
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* the given {@code float}.
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*
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* @param bank The bank number.
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* @param i The desired data array element.
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* @param val The value to be set.
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* @see #getElemFloat(int)
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* @see #getElemFloat(int, int)
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*/
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public void setElemFloat(int bank, int i, float val) {
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bankdata[bank][i+offsets[bank]] = val;
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theTrackable.markDirty();
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}
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/**
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* Returns the requested data array element from the first
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* (default) bank as a {@code double}.
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*
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* @param i The desired data array element.
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*
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* @return The data entry as a {@code double}.
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* @see #setElemDouble(int, double)
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* @see #setElemDouble(int, int, double)
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*/
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public double getElemDouble(int i) {
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return (double)data[i+offset];
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}
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/**
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* Returns the requested data array element from the specified
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* bank as a {@code double}.
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*
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* @param bank The bank number.
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* @param i The desired data array element.
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*
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* @return The data entry as a {@code double}.
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* @see #setElemDouble(int, double)
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* @see #setElemDouble(int, int, double)
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*/
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public double getElemDouble(int bank, int i) {
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return (double)bankdata[bank][i+offsets[bank]];
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}
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/**
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* Sets the requested data array element in the first (default)
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* bank to the given {@code double}.
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*
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* @param i The desired data array element.
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* @param val The value to be set.
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* @see #getElemDouble(int)
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* @see #getElemDouble(int, int)
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*/
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public void setElemDouble(int i, double val) {
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data[i+offset] = (float)val;
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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 to
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* the given {@code double}.
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*
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* @param bank The bank number.
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* @param i The desired data array element.
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* @param val The value to be set.
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* @see #getElemDouble(int)
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* @see #getElemDouble(int, int)
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*/
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public void setElemDouble(int bank, int i, double val) {
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bankdata[bank][i+offsets[bank]] = (float)val;
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theTrackable.markDirty();
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}
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}
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