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404 lines
13 KiB
404 lines
13 KiB
/*
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* Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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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</code> and stores data internally
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* in <code>double</code> form.
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* <p>
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* <a name="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 DataBufferDouble extends DataBuffer {
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/** The array of data banks. */
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double bankdata[][];
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/** A reference to the default data bank. */
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double data[];
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/**
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* Constructs a <code>double</code>-based <code>DataBuffer</code>
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* with a specified size.
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*
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* @param size The number of elements in the <code>DataBuffer</code>.
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*/
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public DataBufferDouble(int size) {
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super(STABLE, TYPE_DOUBLE, size);
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data = new double[size];
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bankdata = new double[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs a <code>double</code>-based <code>DataBuffer</code>
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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</code>.
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* @param numBanks The number of banks in the <code>DataBuffer</code>.
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*/
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public DataBufferDouble(int size, int numBanks) {
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super(STABLE, TYPE_DOUBLE, size, numBanks);
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bankdata = new double[numBanks][];
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for (int i= 0; i < numBanks; i++) {
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bankdata[i] = new double[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>double</code>-based <code>DataBuffer</code>
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* with the specified data array. Only the first
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* <code>size</code> elements are available for use by this
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* <code>DataBuffer</code>. The array must be large enough to
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* hold <code>size</code> 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>double</code>s to be used as the
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* first and only bank of this <code>DataBuffer</code>.
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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 DataBufferDouble(double dataArray[], int size) {
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super(UNTRACKABLE, TYPE_DOUBLE, size);
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data = dataArray;
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bankdata = new double[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs a <code>double</code>-based <code>DataBuffer</code>
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* with the specified data array. Only the elements between
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* <code>offset</code> and <code>offset + size - 1</code> are
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* available for use by this <code>DataBuffer</code>. The array
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* must be large enough to hold <code>offset + size</code> 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>double</code>s to be used as the
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* first and only bank of this <code>DataBuffer</code>.
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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 DataBufferDouble(double dataArray[], int size, int offset) {
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super(UNTRACKABLE, TYPE_DOUBLE, size, 1, offset);
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data = dataArray;
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bankdata = new double[1][];
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bankdata[0] = data;
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}
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/**
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* Constructs a <code>double</code>-based <code>DataBuffer</code>
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* with the specified data arrays. Only the first
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* <code>size</code> elements of each array are available for use
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* by this <code>DataBuffer</code>. The number of banks will be
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* equal <code>to dataArray.length</code>.
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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>double</code>s to be
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* used as the banks of this <code>DataBuffer</code>.
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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 DataBufferDouble(double dataArray[][], int size) {
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super(UNTRACKABLE, TYPE_DOUBLE, size, dataArray.length);
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bankdata = (double[][]) dataArray.clone();
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data = bankdata[0];
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}
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/**
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* Constructs a <code>double</code>-based <code>DataBuffer</code>
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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 dataArray.length. Each array
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* must be at least as large as <code>size</code> plus the
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* corresponding offset. There must be an entry in the
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* <code>offsets</code> 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>double</code>s to be
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* used as the banks of this <code>DataBuffer</code>.
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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 DataBufferDouble(double dataArray[][], int size, int offsets[]) {
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super(UNTRACKABLE, TYPE_DOUBLE, size, dataArray.length, offsets);
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bankdata = (double[][]) 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>double</code> 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 double data array.
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*/
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public double[] 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</code>.
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*/
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public double[] 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 from this data buffer.
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*/
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public double[][] getBankData() {
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theTrackable.setUntrackable();
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return (double[][]) 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</code>.
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*
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* @param i The desired data array element.
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* @return The data entry as an <code>int</code>.
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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</code>.
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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</code>.
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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</code>.
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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] = (double)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
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* to the given <code>int</code>.
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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]] = (double)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</code>.
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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</code>.
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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 (float)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</code>.
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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</code>.
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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 (float)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</code>.
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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] = (double)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</code>.
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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]] = (double)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</code>.
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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</code>.
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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 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</code>.
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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</code>.
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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 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</code>.
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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] = 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</code>.
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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]] = val;
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theTrackable.markDirty();
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}
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}
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