mirror of git://gcc.gnu.org/git/gcc.git
549 lines
16 KiB
Java
549 lines
16 KiB
Java
/* Copyright (C) 2004, 2005, 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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* MultiPixelPackedSampleModel provides a single band model that supports
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* multiple pixels in a single unit. Pixels have 2^n bits and 2^k pixels fit
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* per data element.
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*
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* @author Jerry Quinn (jlquinn@optonline.net)
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*/
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public final class BandedSampleModel extends ComponentSampleModel
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{
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private int[] bitMasks;
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private int[] bitOffsets;
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private int[] sampleSize;
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private int dataBitOffset;
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private int elemBits;
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private int numberOfBits;
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private int numElems;
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private static int[] createBankArray(int size)
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{
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int[] result = new int[size];
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for (int i = 0; i < size; i++)
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result[i] = i;
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return result;
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}
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public BandedSampleModel(int dataType, int w, int h, int numBands)
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{
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this(dataType, w, h, w, createBankArray(numBands), new int[numBands]);
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}
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public BandedSampleModel(int dataType, int w, int h, int scanlineStride,
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int[] bankIndices, int[] bandOffsets)
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{
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super(dataType, w, h, 1, scanlineStride, bankIndices, bandOffsets);
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}
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public SampleModel createCompatibleSampleModel(int w, int h)
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{
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// NOTE: blackdown 1.4.1 sets all offsets to 0. Sun's 1.4.2 docs
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// disagree.
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// Compress offsets so minimum is 0, others w*scanlineStride
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int[] newoffsets = new int[bandOffsets.length];
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int[] order = new int[bandOffsets.length];
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for (int i=0; i < bandOffsets.length; i++)
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order[i] = i;
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// FIXME: This is N^2, but not a big issue, unless there's a lot of
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// bands...
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for (int i=0; i < bandOffsets.length; i++)
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for (int j=i+1; j < bandOffsets.length; i++)
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if (bankIndices[order[i]] > bankIndices[order[j]]
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|| (bankIndices[order[i]] == bankIndices[order[j]]
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&& bandOffsets[order[i]] > bandOffsets[order[j]]))
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{
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int t = order[i]; order[i] = order[j]; order[j] = t;
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}
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int bank = 0;
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int offset = 0;
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for (int i=0; i < bandOffsets.length; i++)
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{
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if (bankIndices[order[i]] != bank)
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{
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bank = bankIndices[order[i]];
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offset = 0;
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}
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newoffsets[order[i]] = offset;
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offset += w * scanlineStride;
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}
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return new BandedSampleModel(dataType, w, h, scanlineStride, bankIndices, newoffsets);
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}
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public SampleModel createSubsetSampleModel(int[] bands)
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{
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if (bands.length > bankIndices.length)
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throw new
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RasterFormatException("BandedSampleModel createSubsetSampleModel too"
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+" many bands");
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int[] newoff = new int[bands.length];
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int[] newbanks = new int[bands.length];
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for (int i=0; i < bands.length; i++)
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{
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int b = bands[i];
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newoff[i] = bandOffsets[b];
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newbanks[i] = bankIndices[b];
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}
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return new BandedSampleModel(dataType, width, height, scanlineStride,
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newbanks, newoff);
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}
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/**
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* Extract all samples of one pixel and return in an array of transfer type.
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*
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* Extracts the pixel at x, y from data and stores samples into the array
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* obj. If obj is null, a new array of getTransferType() is created.
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*
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* @param x The x-coordinate of the pixel rectangle to store in <code>obj</code>.
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* @param y The y-coordinate of the pixel rectangle to store in <code>obj</code>.
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* @param obj The primitive array to store the pixels into or null to force creation.
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* @param data The DataBuffer that is the source of the pixel data.
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* @return The primitive array containing the pixel data.
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* @see java.awt.image.SampleModel#getDataElements(int, int, java.lang.Object, java.awt.image.DataBuffer)
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*/
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public Object getDataElements(int x, int y, Object obj,
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DataBuffer data)
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{
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int pixel = getSample(x, y, 0, data);
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switch (getTransferType())
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{
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case DataBuffer.TYPE_BYTE:
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{
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byte[] b = (byte[])obj;
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if (b == null) b = new byte[numBands];
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for (int i=0; i < numBands; i++)
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b[i] = (byte)getSample(x, y, i, data);
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return b;
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}
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case DataBuffer.TYPE_SHORT:
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case DataBuffer.TYPE_USHORT:
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{
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short[] b = (short[])obj;
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if (b == null) b = new short[numBands];
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for (int i=0; i < numBands; i++)
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b[i] = (short)getSample(x, y, i, data);
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return b;
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}
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case DataBuffer.TYPE_INT:
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{
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int[] b = (int[])obj;
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if (b == null) b = new int[numBands];
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for (int i=0; i < numBands; i++)
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b[i] = getSample(x, y, i, data);
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return b;
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}
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case DataBuffer.TYPE_FLOAT:
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{
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float[] b = (float[])obj;
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if (b == null) b = new float[numBands];
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for (int i=0; i < numBands; i++)
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b[i] = getSampleFloat(x, y, i, data);
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return b;
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}
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case DataBuffer.TYPE_DOUBLE:
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{
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double[] b = (double[])obj;
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if (b == null) b = new double[numBands];
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for (int i=0; i < numBands; i++)
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b[i] = getSample(x, y, i, data);
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return b;
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}
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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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public int[] getPixel(int x, int y, int[] iArray, DataBuffer data)
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{
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if (iArray == null) iArray = new int[numBands];
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for (int i=0; i < numBands; i++)
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iArray[i] = getSample(x, y, i, data);
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return iArray;
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}
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/**
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* Copy pixels from a region into an array.
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*
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* Copies the samples of the pixels in the rectangle starting at x, y that
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* is w pixels wide and h scanlines high. When there is more than one band,
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* the samples stored in order before the next pixel. This ordering isn't
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* well specified in Sun's docs as of 1.4.2.
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*
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* If iArray is null, a new array is allocated, filled, and returned.
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*
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* @param x The x-coordinate of the pixel rectangle to store in
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* <code>iArray</code>.
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* @param y The y-coordinate of the pixel rectangle to store in
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* <code>iArray</code>.
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* @param w The width in pixels of the rectangle.
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* @param h The height in pixels of the rectangle.
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* @param iArray The int array to store the pixels into or null to force
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* creation.
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* @param data The DataBuffer that is the source of the pixel data.
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* @return The primitive array containing the pixel data.
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*/
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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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if (iArray == null) iArray = new int[w*h*numBands];
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int outOffset = 0;
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int maxX = x + w;
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int maxY = y + h;
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for (int yy = x; yy < maxY; yy++)
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{
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for (int xx = x; xx < maxX; xx++)
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{
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for (int b = 0; b < numBands; b++)
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{
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int offset = bandOffsets[b] + yy * scanlineStride + xx;
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iArray[outOffset++] =
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data.getElem(bankIndices[b], offset);
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}
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}
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}
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return iArray;
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}
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public int getSample(int x, int y, int b, DataBuffer data)
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{
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int offset = bandOffsets[b] + y * scanlineStride + x;
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return data.getElem(bankIndices[b], offset);
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}
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public float getSampleFloat(int x, int y, int b, DataBuffer data)
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{
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int offset = bandOffsets[b] + y * scanlineStride + x;
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return data.getElemFloat(bankIndices[b], offset);
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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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int offset = bandOffsets[b] + y * scanlineStride + x;
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return data.getElemDouble(bankIndices[b], offset);
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}
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/**
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* Copy one band's samples from a region into an array.
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*
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* Copies from one band the samples of the pixels in the rectangle starting
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* at x, y that is w pixels wide and h scanlines high.
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*
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* If iArray is null, a new array is allocated, filled, and returned.
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*
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* @param x The x-coordinate of the pixel rectangle to store in
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* <code>iArray</code>.
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* @param y The y-coordinate of the pixel rectangle to store in
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* <code>iArray</code>.
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* @param w The width in pixels of the rectangle.
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* @param h The height in pixels of the rectangle.
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* @param b The band to retrieve.
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* @param iArray The int array to store the pixels into or null to force
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* creation.
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* @param data The DataBuffer that is the source of the pixel data.
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* @return The primitive array containing the pixel data.
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*/
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public int[] getSamples(int x, int y, int w, int h, int b, int[] iArray,
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DataBuffer data)
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{
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if (iArray == null) iArray = new int[w*h];
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int outOffset = 0;
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int maxX = x + w;
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int maxY = y + h;
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for (int yy = y; yy < maxY; yy++)
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{
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for (int xx = x; xx < maxX; xx++)
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{
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int offset = bandOffsets[b] + yy * scanlineStride + xx;
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iArray[outOffset++] =
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data.getElem(bankIndices[b], offset);
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}
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}
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return iArray;
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}
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/**
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* Set the pixel at x, y to the value in the first element of the primitive
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* array obj.
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*
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* @param x The x-coordinate of the data elements in <code>obj</code>.
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* @param y The y-coordinate of the data elements in <code>obj</code>.
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* @param obj The primitive array containing the data elements to set.
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* @param data The DataBuffer to store the data elements into.
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* @see java.awt.image.SampleModel#setDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer)
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*/
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public void setDataElements(int x, int y, Object obj, DataBuffer data)
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{
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int transferType = getTransferType();
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if (getTransferType() != data.getDataType())
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{
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throw new IllegalArgumentException("transfer type ("+
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getTransferType()+"), "+
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"does not match data "+
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"buffer type (" +
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data.getDataType() +
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").");
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}
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int offset = y * scanlineStride + x;
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try
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{
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switch (transferType)
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{
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case DataBuffer.TYPE_BYTE:
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{
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DataBufferByte out = (DataBufferByte) data;
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byte[] in = (byte[]) obj;
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for (int i=0; i < numBands; i++)
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out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
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return;
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}
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case DataBuffer.TYPE_SHORT:
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{
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DataBufferShort out = (DataBufferShort) data;
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short[] in = (short[]) obj;
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for (int i=0; i < numBands; i++)
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out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
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return;
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}
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case DataBuffer.TYPE_USHORT:
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{
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DataBufferUShort out = (DataBufferUShort) data;
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short[] in = (short[]) obj;
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for (int i=0; i < numBands; i++)
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out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
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return;
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}
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case DataBuffer.TYPE_INT:
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{
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DataBufferInt out = (DataBufferInt) data;
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int[] in = (int[]) obj;
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for (int i=0; i < numBands; i++)
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out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
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return;
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}
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case DataBuffer.TYPE_FLOAT:
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{
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DataBufferFloat out = (DataBufferFloat) data;
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float[] in = (float[]) obj;
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for (int i=0; i < numBands; i++)
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out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
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return;
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}
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case DataBuffer.TYPE_DOUBLE:
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{
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DataBufferDouble out = (DataBufferDouble) data;
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double[] in = (double[]) obj;
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for (int i=0; i < numBands; i++)
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out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
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return;
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}
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default:
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throw new ClassCastException("Unsupported data type");
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}
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}
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catch (ArrayIndexOutOfBoundsException aioobe)
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{
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String msg = "While writing data elements" +
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", x="+x+", y="+y+
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", width="+width+", height="+height+
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", scanlineStride="+scanlineStride+
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", offset="+offset+
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", data.getSize()="+data.getSize()+
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", data.getOffset()="+data.getOffset()+
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": " +
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aioobe;
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throw new ArrayIndexOutOfBoundsException(msg);
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}
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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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data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x,
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iArray[b]);
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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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for (int hh = 0; hh < h; hh++)
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{
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for (int ww = 0; ww < w; ww++)
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{
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int offset = y * scanlineStride + (x + ww);
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for (int b=0; b < numBands; b++)
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data.setElem(bankIndices[b], bandOffsets[b] + offset,
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iArray[inOffset++]);
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}
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y++;
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}
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}
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public void setSample(int x, int y, int b, int s, DataBuffer data)
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{
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data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
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}
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public void setSample(int x, int y, int b, float s, DataBuffer data)
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{
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data.setElemFloat(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
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}
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public void setSample(int x, int y, int b, double s, DataBuffer data)
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{
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data.setElemDouble(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
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}
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public void setSamples(int x, int y, int w, int h, int b, int[] iArray,
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DataBuffer data)
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{
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int inOffset = 0;
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switch (getTransferType())
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{
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case DataBuffer.TYPE_BYTE:
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{
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DataBufferByte out = (DataBufferByte) data;
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byte[] bank = out.getData(bankIndices[b]);
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for (int hh = 0; hh < h; hh++)
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{
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for (int ww = 0; ww < w; ww++)
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{
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int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
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bank[offset] = (byte)iArray[inOffset++];
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}
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y++;
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}
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return;
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}
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case DataBuffer.TYPE_SHORT:
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{
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DataBufferShort out = (DataBufferShort) data;
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short[] bank = out.getData(bankIndices[b]);
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for (int hh = 0; hh < h; hh++)
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{
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for (int ww = 0; ww < w; ww++)
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{
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int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
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bank[offset] = (short)iArray[inOffset++];
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}
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y++;
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}
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return;
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}
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case DataBuffer.TYPE_USHORT:
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{
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DataBufferShort out = (DataBufferShort) data;
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short[] bank = out.getData(bankIndices[b]);
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for (int hh = 0; hh < h; hh++)
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{
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for (int ww = 0; ww < w; ww++)
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{
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int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
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bank[offset] = (short)iArray[inOffset++];
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}
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y++;
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}
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return;
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}
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case DataBuffer.TYPE_INT:
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{
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|
DataBufferInt out = (DataBufferInt) data;
|
|
int[] bank = out.getData(bankIndices[b]);
|
|
for (int hh = 0; hh < h; hh++)
|
|
{
|
|
for (int ww = 0; ww < w; ww++)
|
|
{
|
|
int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
|
|
bank[offset] = iArray[inOffset++];
|
|
}
|
|
y++;
|
|
}
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_FLOAT:
|
|
case DataBuffer.TYPE_DOUBLE:
|
|
break;
|
|
default:
|
|
throw new ClassCastException("Unsupported data type");
|
|
}
|
|
|
|
// Default implementation probably slower for float and double
|
|
for (int hh = 0; hh < h; hh++)
|
|
{
|
|
for (int ww = 0; ww < w; ww++)
|
|
{
|
|
int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
|
|
data.setElem(bankIndices[b], offset, iArray[inOffset++]);
|
|
}
|
|
y++;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates a String with some information about this SampleModel.
|
|
* @return A String describing this SampleModel.
|
|
* @see java.lang.Object#toString()
|
|
*/
|
|
public String toString()
|
|
{
|
|
StringBuffer result = new StringBuffer();
|
|
result.append(getClass().getName());
|
|
result.append("[");
|
|
result.append("scanlineStride=").append(scanlineStride);
|
|
for(int i=0; i < bitMasks.length; i+=1)
|
|
{
|
|
result.append(", mask[").append(i).append("]=0x").append(Integer.toHexString(bitMasks[i]));
|
|
}
|
|
|
|
result.append("]");
|
|
return result.toString();
|
|
}
|
|
}
|