| /* |
| * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* **************************************************************** |
| ****************************************************************** |
| ****************************************************************** |
| *** COPYRIGHT (c) Eastman Kodak Company, 1997 |
| *** As an unpublished work pursuant to Title 17 of the United |
| *** States Code. All rights reserved. |
| ****************************************************************** |
| ****************************************************************** |
| ******************************************************************/ |
| |
| package java.awt.image; |
| |
| import sun.java2d.StateTrackable.State; |
| import static sun.java2d.StateTrackable.State.*; |
| import sun.java2d.StateTrackableDelegate; |
| |
| import sun.awt.image.SunWritableRaster; |
| |
| /** |
| * This class exists to wrap one or more data arrays. Each data array in |
| * the DataBuffer is referred to as a bank. Accessor methods for getting |
| * and setting elements of the DataBuffer's banks exist with and without |
| * a bank specifier. The methods without a bank specifier use the default 0th |
| * bank. The DataBuffer can optionally take an offset per bank, so that |
| * data in an existing array can be used even if the interesting data |
| * doesn't start at array location zero. Getting or setting the 0th |
| * element of a bank, uses the (0+offset)th element of the array. The |
| * size field specifies how much of the data array is available for |
| * use. Size + offset for a given bank should never be greater |
| * than the length of the associated data array. The data type of |
| * a data buffer indicates the type of the data array(s) and may also |
| * indicate additional semantics, e.g. storing unsigned 8-bit data |
| * in elements of a byte array. The data type may be TYPE_UNDEFINED |
| * or one of the types defined below. Other types may be added in |
| * the future. Generally, an object of class DataBuffer will be cast down |
| * to one of its data type specific subclasses to access data type specific |
| * methods for improved performance. Currently, the Java 2D(tm) API |
| * image classes use TYPE_BYTE, TYPE_USHORT, TYPE_INT, TYPE_SHORT, |
| * TYPE_FLOAT, and TYPE_DOUBLE DataBuffers to store image data. |
| * @see java.awt.image.Raster |
| * @see java.awt.image.SampleModel |
| */ |
| public abstract class DataBuffer { |
| |
| /** Tag for unsigned byte data. */ |
| public static final int TYPE_BYTE = 0; |
| |
| /** Tag for unsigned short data. */ |
| public static final int TYPE_USHORT = 1; |
| |
| /** Tag for signed short data. Placeholder for future use. */ |
| public static final int TYPE_SHORT = 2; |
| |
| /** Tag for int data. */ |
| public static final int TYPE_INT = 3; |
| |
| /** Tag for float data. Placeholder for future use. */ |
| public static final int TYPE_FLOAT = 4; |
| |
| /** Tag for double data. Placeholder for future use. */ |
| public static final int TYPE_DOUBLE = 5; |
| |
| /** Tag for undefined data. */ |
| public static final int TYPE_UNDEFINED = 32; |
| |
| /** The data type of this DataBuffer. */ |
| protected int dataType; |
| |
| /** The number of banks in this DataBuffer. */ |
| protected int banks; |
| |
| /** Offset into default (first) bank from which to get the first element. */ |
| protected int offset; |
| |
| /** Usable size of all banks. */ |
| protected int size; |
| |
| /** Offsets into all banks. */ |
| protected int offsets[]; |
| |
| /* The current StateTrackable state. */ |
| StateTrackableDelegate theTrackable; |
| |
| /** Size of the data types indexed by DataType tags defined above. */ |
| private static final int dataTypeSize[] = {8,16,16,32,32,64}; |
| |
| /** Returns the size (in bits) of the data type, given a datatype tag. |
| * @param type the value of one of the defined datatype tags |
| * @return the size of the data type |
| * @throws IllegalArgumentException if <code>type</code> is less than |
| * zero or greater than {@link #TYPE_DOUBLE} |
| */ |
| public static int getDataTypeSize(int type) { |
| if (type < TYPE_BYTE || type > TYPE_DOUBLE) { |
| throw new IllegalArgumentException("Unknown data type "+type); |
| } |
| return dataTypeSize[type]; |
| } |
| |
| /** |
| * Constructs a DataBuffer containing one bank of the specified |
| * data type and size. |
| * |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| */ |
| protected DataBuffer(int dataType, int size) { |
| this(UNTRACKABLE, dataType, size); |
| } |
| |
| /** |
| * Constructs a DataBuffer containing one bank of the specified |
| * data type and size with the indicated initial {@link State State}. |
| * |
| * @param initialState the initial {@link State State} state of the data |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| * @since 1.7 |
| */ |
| DataBuffer(State initialState, |
| int dataType, int size) |
| { |
| this.theTrackable = StateTrackableDelegate.createInstance(initialState); |
| this.dataType = dataType; |
| this.banks = 1; |
| this.size = size; |
| this.offset = 0; |
| this.offsets = new int[1]; // init to 0 by new |
| } |
| |
| /** |
| * Constructs a DataBuffer containing the specified number of |
| * banks. Each bank has the specified size and an offset of 0. |
| * |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| * @param numBanks the number of banks in this |
| * <code>DataBuffer</code> |
| */ |
| protected DataBuffer(int dataType, int size, int numBanks) { |
| this(UNTRACKABLE, dataType, size, numBanks); |
| } |
| |
| /** |
| * Constructs a DataBuffer containing the specified number of |
| * banks with the indicated initial {@link State State}. |
| * Each bank has the specified size and an offset of 0. |
| * |
| * @param initialState the initial {@link State State} state of the data |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| * @param numBanks the number of banks in this |
| * <code>DataBuffer</code> |
| * @since 1.7 |
| */ |
| DataBuffer(State initialState, |
| int dataType, int size, int numBanks) |
| { |
| this.theTrackable = StateTrackableDelegate.createInstance(initialState); |
| this.dataType = dataType; |
| this.banks = numBanks; |
| this.size = size; |
| this.offset = 0; |
| this.offsets = new int[banks]; // init to 0 by new |
| } |
| |
| /** |
| * Constructs a DataBuffer that contains the specified number |
| * of banks. Each bank has the specified datatype, size and offset. |
| * |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| * @param numBanks the number of banks in this |
| * <code>DataBuffer</code> |
| * @param offset the offset for each bank |
| */ |
| protected DataBuffer(int dataType, int size, int numBanks, int offset) { |
| this(UNTRACKABLE, dataType, size, numBanks, offset); |
| } |
| |
| /** |
| * Constructs a DataBuffer that contains the specified number |
| * of banks with the indicated initial {@link State State}. |
| * Each bank has the specified datatype, size and offset. |
| * |
| * @param initialState the initial {@link State State} state of the data |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| * @param numBanks the number of banks in this |
| * <code>DataBuffer</code> |
| * @param offset the offset for each bank |
| * @since 1.7 |
| */ |
| DataBuffer(State initialState, |
| int dataType, int size, int numBanks, int offset) |
| { |
| this.theTrackable = StateTrackableDelegate.createInstance(initialState); |
| this.dataType = dataType; |
| this.banks = numBanks; |
| this.size = size; |
| this.offset = offset; |
| this.offsets = new int[numBanks]; |
| for (int i = 0; i < numBanks; i++) { |
| this.offsets[i] = offset; |
| } |
| } |
| |
| /** |
| * Constructs a DataBuffer which contains the specified number |
| * of banks. Each bank has the specified datatype and size. The |
| * offset for each bank is specified by its respective entry in |
| * the offsets array. |
| * |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| * @param numBanks the number of banks in this |
| * <code>DataBuffer</code> |
| * @param offsets an array containing an offset for each bank. |
| * @throws ArrayIndexOutOfBoundsException if <code>numBanks</code> |
| * does not equal the length of <code>offsets</code> |
| */ |
| protected DataBuffer(int dataType, int size, int numBanks, int offsets[]) { |
| this(UNTRACKABLE, dataType, size, numBanks, offsets); |
| } |
| |
| /** |
| * Constructs a DataBuffer which contains the specified number |
| * of banks with the indicated initial {@link State State}. |
| * Each bank has the specified datatype and size. The |
| * offset for each bank is specified by its respective entry in |
| * the offsets array. |
| * |
| * @param initialState the initial {@link State State} state of the data |
| * @param dataType the data type of this <code>DataBuffer</code> |
| * @param size the size of the banks |
| * @param numBanks the number of banks in this |
| * <code>DataBuffer</code> |
| * @param offsets an array containing an offset for each bank. |
| * @throws ArrayIndexOutOfBoundsException if <code>numBanks</code> |
| * does not equal the length of <code>offsets</code> |
| * @since 1.7 |
| */ |
| DataBuffer(State initialState, |
| int dataType, int size, int numBanks, int offsets[]) |
| { |
| if (numBanks != offsets.length) { |
| throw new ArrayIndexOutOfBoundsException("Number of banks" + |
| " does not match number of bank offsets"); |
| } |
| this.theTrackable = StateTrackableDelegate.createInstance(initialState); |
| this.dataType = dataType; |
| this.banks = numBanks; |
| this.size = size; |
| this.offset = offsets[0]; |
| this.offsets = (int[])offsets.clone(); |
| } |
| |
| /** Returns the data type of this DataBuffer. |
| * @return the data type of this <code>DataBuffer</code>. |
| */ |
| public int getDataType() { |
| return dataType; |
| } |
| |
| /** Returns the size (in array elements) of all banks. |
| * @return the size of all banks. |
| */ |
| public int getSize() { |
| return size; |
| } |
| |
| /** Returns the offset of the default bank in array elements. |
| * @return the offset of the default bank. |
| */ |
| public int getOffset() { |
| return offset; |
| } |
| |
| /** Returns the offsets (in array elements) of all the banks. |
| * @return the offsets of all banks. |
| */ |
| public int[] getOffsets() { |
| return (int[])offsets.clone(); |
| } |
| |
| /** Returns the number of banks in this DataBuffer. |
| * @return the number of banks. |
| */ |
| public int getNumBanks() { |
| return banks; |
| } |
| |
| /** |
| * Returns the requested data array element from the first (default) bank |
| * as an integer. |
| * @param i the index of the requested data array element |
| * @return the data array element at the specified index. |
| * @see #setElem(int, int) |
| * @see #setElem(int, int, int) |
| */ |
| public int getElem(int i) { |
| return getElem(0,i); |
| } |
| |
| /** |
| * Returns the requested data array element from the specified bank |
| * as an integer. |
| * @param bank the specified bank |
| * @param i the index of the requested data array element |
| * @return the data array element at the specified index from the |
| * specified bank at the specified index. |
| * @see #setElem(int, int) |
| * @see #setElem(int, int, int) |
| */ |
| public abstract int getElem(int bank, int i); |
| |
| /** |
| * Sets the requested data array element in the first (default) bank |
| * from the given integer. |
| * @param i the specified index into the data array |
| * @param val the data to set the element at the specified index in |
| * the data array |
| * @see #getElem(int) |
| * @see #getElem(int, int) |
| */ |
| public void setElem(int i, int val) { |
| setElem(0,i,val); |
| } |
| |
| /** |
| * Sets the requested data array element in the specified bank |
| * from the given integer. |
| * @param bank the specified bank |
| * @param i the specified index into the data array |
| * @param val the data to set the element in the specified bank |
| * at the specified index in the data array |
| * @see #getElem(int) |
| * @see #getElem(int, int) |
| */ |
| public abstract void setElem(int bank, int i, int val); |
| |
| /** |
| * Returns the requested data array element from the first (default) bank |
| * as a float. The implementation in this class is to cast getElem(i) |
| * to a float. Subclasses may override this method if another |
| * implementation is needed. |
| * @param i the index of the requested data array element |
| * @return a float value representing the data array element at the |
| * specified index. |
| * @see #setElemFloat(int, float) |
| * @see #setElemFloat(int, int, float) |
| */ |
| public float getElemFloat(int i) { |
| return (float)getElem(i); |
| } |
| |
| /** |
| * Returns the requested data array element from the specified bank |
| * as a float. The implementation in this class is to cast |
| * {@link #getElem(int, int)} |
| * to a float. Subclasses can override this method if another |
| * implementation is needed. |
| * @param bank the specified bank |
| * @param i the index of the requested data array element |
| * @return a float value representing the data array element from the |
| * specified bank at the specified index. |
| * @see #setElemFloat(int, float) |
| * @see #setElemFloat(int, int, float) |
| */ |
| public float getElemFloat(int bank, int i) { |
| return (float)getElem(bank,i); |
| } |
| |
| /** |
| * Sets the requested data array element in the first (default) bank |
| * from the given float. The implementation in this class is to cast |
| * val to an int and call {@link #setElem(int, int)}. Subclasses |
| * can override this method if another implementation is needed. |
| * @param i the specified index |
| * @param val the value to set the element at the specified index in |
| * the data array |
| * @see #getElemFloat(int) |
| * @see #getElemFloat(int, int) |
| */ |
| public void setElemFloat(int i, float val) { |
| setElem(i,(int)val); |
| } |
| |
| /** |
| * Sets the requested data array element in the specified bank |
| * from the given float. The implementation in this class is to cast |
| * val to an int and call {@link #setElem(int, int)}. Subclasses can |
| * override this method if another implementation is needed. |
| * @param bank the specified bank |
| * @param i the specified index |
| * @param val the value to set the element in the specified bank at |
| * the specified index in the data array |
| * @see #getElemFloat(int) |
| * @see #getElemFloat(int, int) |
| */ |
| public void setElemFloat(int bank, int i, float val) { |
| setElem(bank,i,(int)val); |
| } |
| |
| /** |
| * Returns the requested data array element from the first (default) bank |
| * as a double. The implementation in this class is to cast |
| * {@link #getElem(int)} |
| * to a double. Subclasses can override this method if another |
| * implementation is needed. |
| * @param i the specified index |
| * @return a double value representing the element at the specified |
| * index in the data array. |
| * @see #setElemDouble(int, double) |
| * @see #setElemDouble(int, int, double) |
| */ |
| public double getElemDouble(int i) { |
| return (double)getElem(i); |
| } |
| |
| /** |
| * Returns the requested data array element from the specified bank as |
| * a double. The implementation in this class is to cast getElem(bank, i) |
| * to a double. Subclasses may override this method if another |
| * implementation is needed. |
| * @param bank the specified bank |
| * @param i the specified index |
| * @return a double value representing the element from the specified |
| * bank at the specified index in the data array. |
| * @see #setElemDouble(int, double) |
| * @see #setElemDouble(int, int, double) |
| */ |
| public double getElemDouble(int bank, int i) { |
| return (double)getElem(bank,i); |
| } |
| |
| /** |
| * Sets the requested data array element in the first (default) bank |
| * from the given double. The implementation in this class is to cast |
| * val to an int and call {@link #setElem(int, int)}. Subclasses can |
| * override this method if another implementation is needed. |
| * @param i the specified index |
| * @param val the value to set the element at the specified index |
| * in the data array |
| * @see #getElemDouble(int) |
| * @see #getElemDouble(int, int) |
| */ |
| public void setElemDouble(int i, double val) { |
| setElem(i,(int)val); |
| } |
| |
| /** |
| * Sets the requested data array element in the specified bank |
| * from the given double. The implementation in this class is to cast |
| * val to an int and call {@link #setElem(int, int)}. Subclasses can |
| * override this method if another implementation is needed. |
| * @param bank the specified bank |
| * @param i the specified index |
| * @param val the value to set the element in the specified bank |
| * at the specified index of the data array |
| * @see #getElemDouble(int) |
| * @see #getElemDouble(int, int) |
| */ |
| public void setElemDouble(int bank, int i, double val) { |
| setElem(bank,i,(int)val); |
| } |
| |
| static int[] toIntArray(Object obj) { |
| if (obj instanceof int[]) { |
| return (int[])obj; |
| } else if (obj == null) { |
| return null; |
| } else if (obj instanceof short[]) { |
| short sdata[] = (short[])obj; |
| int idata[] = new int[sdata.length]; |
| for (int i = 0; i < sdata.length; i++) { |
| idata[i] = (int)sdata[i] & 0xffff; |
| } |
| return idata; |
| } else if (obj instanceof byte[]) { |
| byte bdata[] = (byte[])obj; |
| int idata[] = new int[bdata.length]; |
| for (int i = 0; i < bdata.length; i++) { |
| idata[i] = 0xff & (int)bdata[i]; |
| } |
| return idata; |
| } |
| return null; |
| } |
| |
| static { |
| SunWritableRaster.setDataStealer(new SunWritableRaster.DataStealer() { |
| public byte[] getData(DataBufferByte dbb, int bank) { |
| return dbb.bankdata[bank]; |
| } |
| |
| public short[] getData(DataBufferUShort dbus, int bank) { |
| return dbus.bankdata[bank]; |
| } |
| |
| public int[] getData(DataBufferInt dbi, int bank) { |
| return dbi.bankdata[bank]; |
| } |
| |
| public StateTrackableDelegate getTrackable(DataBuffer db) { |
| return db.theTrackable; |
| } |
| |
| public void setTrackable(DataBuffer db, |
| StateTrackableDelegate trackable) |
| { |
| db.theTrackable = trackable; |
| } |
| }); |
| } |
| } |
