mirror of git://gcc.gnu.org/git/gcc.git
519 lines
15 KiB
Java
519 lines
15 KiB
Java
/* Copyright (C) 2000, 2001, 2002, 2005, 2006, Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt.image;
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/**
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* @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
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*/
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public abstract class SampleModel
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{
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/** Width of image described. */
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protected int width;
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/** Height of image described. */
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protected int height;
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/** Number of bands in the image described. Package-private here,
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shadowed by ComponentSampleModel. */
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protected int numBands;
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/**
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* The DataBuffer type that is used to store the data of the image
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* described.
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*/
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protected int dataType;
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/**
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* Creates a new sample model with the specified attributes.
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*
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* @param dataType the data type (one of {@link DataBuffer#TYPE_BYTE},
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* {@link DataBuffer#TYPE_USHORT}, {@link DataBuffer#TYPE_SHORT},
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* {@link DataBuffer#TYPE_INT}, {@link DataBuffer#TYPE_FLOAT},
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* {@link DataBuffer#TYPE_DOUBLE} or {@link DataBuffer#TYPE_UNDEFINED}).
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* @param w the width in pixels (must be greater than zero).
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* @param h the height in pixels (must be greater than zero).
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* @param numBands the number of bands (must be greater than zero).
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*
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* @throws IllegalArgumentException if <code>dataType</code> is not one of
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* the listed values.
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* @throws IllegalArgumentException if <code>w</code> is less than or equal
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* to zero.
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* @throws IllegalArgumentException if <code>h</code> is less than or equal
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* to zero.
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* @throws IllegalArgumentException if <code>w * h</code> is greater than
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* {@link Integer#MAX_VALUE}.
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*/
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public SampleModel(int dataType, int w, int h, int numBands)
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{
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if (dataType != DataBuffer.TYPE_UNDEFINED)
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if (dataType < DataBuffer.TYPE_BYTE || dataType > DataBuffer.TYPE_DOUBLE)
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throw new IllegalArgumentException("Unrecognised 'dataType' argument.");
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if ((w <= 0) || (h <= 0))
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throw new IllegalArgumentException((w <= 0 ? " width<=0" : " width is ok")
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+ (h <= 0 ? " height<=0" : " height is ok"));
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long area = (long) w * (long) h;
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if (area > Integer.MAX_VALUE)
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throw new IllegalArgumentException("w * h exceeds Integer.MAX_VALUE.");
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if (numBands <= 0)
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throw new IllegalArgumentException("Requires numBands > 0.");
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this.dataType = dataType;
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this.width = w;
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this.height = h;
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this.numBands = numBands;
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}
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public final int getWidth()
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{
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return width;
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}
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public final int getHeight()
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{
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return height;
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}
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public final int getNumBands()
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{
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return numBands;
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}
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public abstract int getNumDataElements();
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public final int getDataType()
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{
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return dataType;
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}
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public int getTransferType()
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{
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// FIXME: Is this a reasonable default implementation?
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return dataType;
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}
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public int[] getPixel(int x, int y, int[] iArray, DataBuffer data)
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{
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if (iArray == null)
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iArray = new int[numBands];
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for (int b = 0; b < numBands; b++)
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iArray[b] = getSample(x, y, b, data);
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return iArray;
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}
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/**
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*
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* This method is provided as a faster alternative to getPixel(),
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* that can be used when there is no need to decode the pixel into
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* separate sample values.
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*
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* @param obj An array to return the pixel data in. If null, an
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* array of the right type and size will be created.
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*
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* @return A single pixel as an array object of a primitive type,
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* based on the transfer type. Eg. if transfer type is
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* DataBuffer.TYPE_USHORT, then a short[] object is returned.
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*/
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public abstract Object getDataElements(int x, int y, Object obj,
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DataBuffer data);
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public Object getDataElements(int x, int y, int w, int h, Object obj,
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DataBuffer data)
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{
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int size = w * h;
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int numDataElements = getNumDataElements();
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int dataSize = numDataElements * size;
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if (obj == null)
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{
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switch (getTransferType())
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{
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case DataBuffer.TYPE_BYTE:
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obj = new byte[dataSize];
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break;
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case DataBuffer.TYPE_USHORT:
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obj = new short[dataSize];
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break;
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case DataBuffer.TYPE_INT:
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obj = new int[dataSize];
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break;
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default:
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// Seems like the only sensible thing to do.
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throw new ClassCastException();
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}
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}
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Object pixelData = null;
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int outOffset = 0;
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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pixelData = getDataElements(xx, yy, pixelData, data);
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System.arraycopy(pixelData, 0, obj, outOffset,
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numDataElements);
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outOffset += numDataElements;
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}
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}
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return obj;
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}
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public abstract void setDataElements(int x, int y, Object obj,
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DataBuffer data);
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public void setDataElements(int x, int y, int w, int h,
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Object obj, DataBuffer data)
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{
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int size = w * h;
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int numDataElements = getNumDataElements();
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int dataSize = numDataElements * size;
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Object pixelData;
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switch (getTransferType())
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{
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case DataBuffer.TYPE_BYTE:
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pixelData = new byte[numDataElements];
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break;
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case DataBuffer.TYPE_USHORT:
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pixelData = new short[numDataElements];
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break;
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case DataBuffer.TYPE_INT:
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pixelData = new int[numDataElements];
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break;
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default:
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// Seems like the only sensible thing to do.
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throw new ClassCastException();
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}
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int inOffset = 0;
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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System.arraycopy(obj, inOffset, pixelData, 0,
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numDataElements);
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setDataElements(xx, yy, pixelData, data);
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inOffset += numDataElements;
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}
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}
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}
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public float[] getPixel(int x, int y, float[] fArray, DataBuffer data)
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{
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if (fArray == null)
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fArray = new float[numBands];
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for (int b = 0; b < numBands; b++)
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{
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fArray[b] = getSampleFloat(x, y, b, data);
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}
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return fArray;
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}
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public double[] getPixel(int x, int y, double[] dArray, DataBuffer data) {
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if (dArray == null)
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dArray = new double[numBands];
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for (int b = 0; b < numBands; b++)
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{
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dArray[b] = getSampleDouble(x, y, b, data);
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}
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return dArray;
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}
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/* FIXME: Should it return a banded or pixel interleaved array of
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samples? (Assume interleaved.) */
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public int[] getPixels(int x, int y, int w, int h, int[] iArray,
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DataBuffer data)
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{
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int size = w * h;
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int outOffset = 0;
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int[] pixel = null;
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if (iArray == null)
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iArray = new int[w * h * numBands];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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pixel = getPixel(xx, yy, pixel, data);
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System.arraycopy(pixel, 0, iArray, outOffset, numBands);
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outOffset += numBands;
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}
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}
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return iArray;
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}
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/* FIXME: Should it return a banded or pixel interleaved array of
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samples? (Assume interleaved.) */
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public float[] getPixels(int x, int y, int w, int h, float[] fArray,
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DataBuffer data)
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{
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int size = w * h;
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int outOffset = 0;
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float[] pixel = null;
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if (fArray == null) fArray = new float[w * h * numBands];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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pixel = getPixel(xx, yy, pixel, data);
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System.arraycopy(pixel, 0, fArray, outOffset, numBands);
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outOffset += numBands;
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}
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}
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return fArray;
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}
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/* FIXME: Should it return a banded or pixel interleaved array of
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samples? (Assume interleaved.) */
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public double[] getPixels(int x, int y, int w, int h, double[] dArray,
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DataBuffer data)
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{
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int size = w * h;
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int outOffset = 0;
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double[] pixel = null;
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if (dArray == null)
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dArray = new double[w * h * numBands];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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pixel = getPixel(xx, yy, pixel, data);
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System.arraycopy(pixel, 0, dArray, outOffset, numBands);
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outOffset += numBands;
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}
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}
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return dArray;
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}
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public abstract int getSample(int x, int y, int b, DataBuffer data);
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public float getSampleFloat(int x, int y, int b, DataBuffer data)
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{
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return getSample(x, y, b, data);
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}
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public double getSampleDouble(int x, int y, int b, DataBuffer data)
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{
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return getSampleFloat(x, y, b, data);
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}
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public int[] getSamples(int x, int y, int w, int h, int b,
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int[] iArray, DataBuffer data)
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{
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int size = w * h;
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int outOffset = 0;
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if (iArray == null)
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iArray = new int[size];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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iArray[outOffset++] = getSample(xx, yy, b, data);
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}
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}
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return iArray;
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}
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public float[] getSamples(int x, int y, int w, int h, int b,
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float[] fArray, DataBuffer data)
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{
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int size = w * h;
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int outOffset = 0;
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if (fArray == null)
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fArray = new float[size];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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fArray[outOffset++] = getSampleFloat(xx, yy, b, data);
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}
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}
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return fArray;
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}
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public double[] getSamples(int x, int y, int w, int h, int b,
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double[] dArray, DataBuffer data)
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{
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int size = w * h;
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int outOffset = 0;
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if (dArray == null)
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dArray = new double[size];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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dArray[outOffset++] = getSampleDouble(xx, yy, b, data);
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}
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}
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return dArray;
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}
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public void setPixel(int x, int y, int[] iArray, DataBuffer data)
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{
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for (int b = 0; b < numBands; b++)
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setSample(x, y, b, iArray[b], data);
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}
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public void setPixel(int x, int y, float[] fArray, DataBuffer data)
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{
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for (int b = 0; b < numBands; b++)
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setSample(x, y, b, fArray[b], data);
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}
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public void setPixel(int x, int y, double[] dArray, DataBuffer data)
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{
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for (int b = 0; b < numBands; b++)
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setSample(x, y, b, dArray[b], data);
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}
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public void setPixels(int x, int y, int w, int h, int[] iArray,
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DataBuffer data)
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{
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int inOffset = 0;
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int[] pixel = new int[numBands];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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System.arraycopy(iArray, inOffset, pixel, 0, numBands);
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setPixel(xx, yy, pixel, data);
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inOffset += numBands;
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}
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}
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}
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public void setPixels(int x, int y, int w, int h, float[] fArray,
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DataBuffer data)
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{
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int inOffset = 0;
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float[] pixel = new float[numBands];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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System.arraycopy(fArray, inOffset, pixel, 0, numBands);
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setPixel(xx, yy, pixel, data);
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inOffset += numBands;
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}
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}
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}
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public void setPixels(int x, int y, int w, int h, double[] dArray,
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DataBuffer data)
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{
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int inOffset = 0;
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double[] pixel = new double[numBands];
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for (int yy = y; yy < (y + h); yy++)
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{
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for (int xx = x; xx < (x + w); xx++)
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{
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System.arraycopy(dArray, inOffset, pixel, 0, numBands);
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setPixel(xx, yy, pixel, data);
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inOffset += numBands;
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}
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}
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}
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public abstract void setSample(int x, int y, int b, int s,
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DataBuffer data);
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public void setSample(int x, int y, int b, float s,
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DataBuffer data)
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{
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setSample(x, y, b, (int) s, data);
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}
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public void setSample(int x, int y, int b, double s,
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DataBuffer data)
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{
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setSample(x, y, b, (float) s, data);
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}
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public void setSamples(int x, int y, int w, int h, int b,
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int[] iArray, DataBuffer data)
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{
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int size = w * h;
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int inOffset = 0;
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for (int yy = y; yy < (y + h); yy++)
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for (int xx = x; xx < (x + w); xx++)
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setSample(xx, yy, b, iArray[inOffset++], data);
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}
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public void setSamples(int x, int y, int w, int h, int b,
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float[] fArray, DataBuffer data)
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{
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int size = w * h;
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int inOffset = 0;
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for (int yy = y; yy < (y + h); yy++)
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for (int xx = x; xx < (x + w); xx++)
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setSample(xx, yy, b, fArray[inOffset++], data);
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}
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public void setSamples(int x, int y, int w, int h, int b,
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double[] dArray, DataBuffer data) {
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int size = w * h;
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int inOffset = 0;
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for (int yy = y; yy < (y + h); yy++)
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for (int xx = x; xx < (x + w); xx++)
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setSample(xx, yy, b, dArray[inOffset++], data);
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}
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public abstract SampleModel createCompatibleSampleModel(int w, int h);
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/**
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* Return a SampleModel with a subset of the bands in this model.
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*
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* Selects bands.length bands from this sample model. The bands chosen
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* are specified in the indices of bands[]. This also permits permuting
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* the bands as well as taking a subset. Thus, giving an array with
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* 1, 2, 3, ..., numbands, will give an identical sample model.
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*
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* @param bands Array with band indices to include.
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* @return A new sample model
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*/
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public abstract SampleModel createSubsetSampleModel(int[] bands);
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public abstract DataBuffer createDataBuffer();
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public abstract int[] getSampleSize();
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public abstract int getSampleSize(int band);
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}
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