--- /dev/null
+/* Copyright (C) 2004, 2005, Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.awt.image;
+
+/**
+ * MultiPixelPackedSampleModel provides a single band model that supports
+ * multiple pixels in a single unit. Pixels have 2^n bits and 2^k pixels fit
+ * per data element.
+ *
+ * @author Jerry Quinn (jlquinn@optonline.net)
+ */
+public final class BandedSampleModel extends ComponentSampleModel
+{
+ private int[] bitMasks;
+ private int[] bitOffsets;
+ private int[] sampleSize;
+ private int dataBitOffset;
+ private int elemBits;
+ private int numberOfBits;
+ private int numElems;
+
+ private static int[] createBankArray(int size)
+ {
+ int[] result = new int[size];
+ for (int i = 0; i < size; i++)
+ result[i] = i;
+ return result;
+ }
+
+ public BandedSampleModel(int dataType, int w, int h, int numBands)
+ {
+ this(dataType, w, h, w, createBankArray(numBands), new int[numBands]);
+ }
+
+ public BandedSampleModel(int dataType, int w, int h, int scanlineStride,
+ int[] bankIndices, int[] bandOffsets)
+ {
+ super(dataType, w, h, 1, scanlineStride, bankIndices, bandOffsets);
+ }
+
+ public SampleModel createCompatibleSampleModel(int w, int h)
+ {
+ // NOTE: blackdown 1.4.1 sets all offsets to 0. Sun's 1.4.2 docs
+ // disagree.
+
+ // Compress offsets so minimum is 0, others w*scanlineStride
+ int[] newoffsets = new int[bandOffsets.length];
+ int[] order = new int[bandOffsets.length];
+ for (int i=0; i < bandOffsets.length; i++)
+ order[i] = i;
+ // FIXME: This is N^2, but not a big issue, unless there's a lot of
+ // bands...
+ for (int i=0; i < bandOffsets.length; i++)
+ for (int j=i+1; j < bandOffsets.length; i++)
+ if (bankIndices[order[i]] > bankIndices[order[j]]
+ || (bankIndices[order[i]] == bankIndices[order[j]]
+ && bandOffsets[order[i]] > bandOffsets[order[j]]))
+ {
+ int t = order[i]; order[i] = order[j]; order[j] = t;
+ }
+ int bank = 0;
+ int offset = 0;
+ for (int i=0; i < bandOffsets.length; i++)
+ {
+ if (bankIndices[order[i]] != bank)
+ {
+ bank = bankIndices[order[i]];
+ offset = 0;
+ }
+ newoffsets[order[i]] = offset;
+ offset += w * scanlineStride;
+ }
+
+ return new BandedSampleModel(dataType, w, h, scanlineStride, bankIndices, newoffsets);
+ }
+
+
+ public SampleModel createSubsetSampleModel(int[] bands)
+ {
+ if (bands.length > bankIndices.length)
+ throw new
+ RasterFormatException("BandedSampleModel createSubsetSampleModel too"
+ +" many bands");
+ int[] newoff = new int[bands.length];
+ int[] newbanks = new int[bands.length];
+ for (int i=0; i < bands.length; i++)
+ {
+ int b = bands[i];
+ newoff[i] = bandOffsets[b];
+ newbanks[i] = bankIndices[b];
+ }
+
+ return new BandedSampleModel(dataType, width, height, scanlineStride,
+ newbanks, newoff);
+ }
+
+ /**
+ * Extract all samples of one pixel and return in an array of transfer type.
+ *
+ * Extracts the pixel at x, y from data and stores samples into the array
+ * obj. If obj is null, a new array of getTransferType() is created.
+ *
+ * @param x The x-coordinate of the pixel rectangle to store in <code>obj</code>.
+ * @param y The y-coordinate of the pixel rectangle to store in <code>obj</code>.
+ * @param obj The primitive array to store the pixels into or null to force creation.
+ * @param data The DataBuffer that is the source of the pixel data.
+ * @return The primitive array containing the pixel data.
+ * @see java.awt.image.SampleModel#getDataElements(int, int, java.lang.Object, java.awt.image.DataBuffer)
+ */
+ public Object getDataElements(int x, int y, Object obj,
+ DataBuffer data)
+ {
+ int pixel = getSample(x, y, 0, data);
+ switch (getTransferType())
+ {
+ case DataBuffer.TYPE_BYTE:
+ {
+ byte[] b = (byte[])obj;
+ if (b == null) b = new byte[numBands];
+ for (int i=0; i < numBands; i++)
+ b[i] = (byte)getSample(x, y, i, data);
+ return b;
+ }
+ case DataBuffer.TYPE_SHORT:
+ case DataBuffer.TYPE_USHORT:
+ {
+ short[] b = (short[])obj;
+ if (b == null) b = new short[numBands];
+ for (int i=0; i < numBands; i++)
+ b[i] = (short)getSample(x, y, i, data);
+ return b;
+ }
+ case DataBuffer.TYPE_INT:
+ {
+ int[] b = (int[])obj;
+ if (b == null) b = new int[numBands];
+ for (int i=0; i < numBands; i++)
+ b[i] = getSample(x, y, i, data);
+ return b;
+ }
+ case DataBuffer.TYPE_FLOAT:
+ {
+ float[] b = (float[])obj;
+ if (b == null) b = new float[numBands];
+ for (int i=0; i < numBands; i++)
+ b[i] = getSampleFloat(x, y, i, data);
+ return b;
+ }
+ case DataBuffer.TYPE_DOUBLE:
+ {
+ double[] b = (double[])obj;
+ if (b == null) b = new double[numBands];
+ for (int i=0; i < numBands; i++)
+ b[i] = getSample(x, y, i, data);
+ return b;
+ }
+
+ default:
+ // Seems like the only sensible thing to do.
+ throw new ClassCastException();
+ }
+ }
+
+ public int[] getPixel(int x, int y, int[] iArray, DataBuffer data)
+ {
+ if (iArray == null) iArray = new int[numBands];
+ for (int i=0; i < numBands; i++)
+ iArray[i] = getSample(x, y, i, data);
+
+ return iArray;
+ }
+
+ /**
+ * Copy pixels from a region into an array.
+ *
+ * Copies the samples of the pixels in the rectangle starting at x, y that
+ * is w pixels wide and h scanlines high. When there is more than one band,
+ * the samples stored in order before the next pixel. This ordering isn't
+ * well specified in Sun's docs as of 1.4.2.
+ *
+ * If iArray is null, a new array is allocated, filled, and returned.
+ *
+ * @param x The x-coordinate of the pixel rectangle to store in
+ * <code>iArray</code>.
+ * @param y The y-coordinate of the pixel rectangle to store in
+ * <code>iArray</code>.
+ * @param w The width in pixels of the rectangle.
+ * @param h The height in pixels of the rectangle.
+ * @param iArray The int array to store the pixels into or null to force
+ * creation.
+ * @param data The DataBuffer that is the source of the pixel data.
+ * @return The primitive array containing the pixel data.
+ */
+ public int[] getPixels(int x, int y, int w, int h, int[] iArray,
+ DataBuffer data)
+ {
+ if (iArray == null) iArray = new int[w*h*numBands];
+ int outOffset = 0;
+ int maxX = x + w;
+ int maxY = y + h;
+ for (int yy = x; yy < maxY; yy++)
+ {
+ for (int xx = x; xx < maxX; xx++)
+ {
+ for (int b = 0; b < numBands; b++)
+ {
+ int offset = bandOffsets[b] + yy * scanlineStride + xx;
+ iArray[outOffset++] =
+ data.getElem(bankIndices[b], offset);
+ }
+ }
+ }
+ return iArray;
+ }
+
+ public int getSample(int x, int y, int b, DataBuffer data)
+ {
+ int offset = bandOffsets[b] + y * scanlineStride + x;
+ return data.getElem(bankIndices[b], offset);
+ }
+
+ public float getSampleFloat(int x, int y, int b, DataBuffer data)
+ {
+ int offset = bandOffsets[b] + y * scanlineStride + x;
+ return data.getElemFloat(bankIndices[b], offset);
+ }
+
+ public double getSampleDouble(int x, int y, int b, DataBuffer data)
+ {
+ int offset = bandOffsets[b] + y * scanlineStride + x;
+ return data.getElemDouble(bankIndices[b], offset);
+ }
+
+ /**
+ * Copy one band's samples from a region into an array.
+ *
+ * Copies from one band the samples of the pixels in the rectangle starting
+ * at x, y that is w pixels wide and h scanlines high.
+ *
+ * If iArray is null, a new array is allocated, filled, and returned.
+ *
+ * @param x The x-coordinate of the pixel rectangle to store in
+ * <code>iArray</code>.
+ * @param y The y-coordinate of the pixel rectangle to store in
+ * <code>iArray</code>.
+ * @param w The width in pixels of the rectangle.
+ * @param h The height in pixels of the rectangle.
+ * @param b The band to retrieve.
+ * @param iArray The int array to store the pixels into or null to force
+ * creation.
+ * @param data The DataBuffer that is the source of the pixel data.
+ * @return The primitive array containing the pixel data.
+ */
+ public int[] getSamples(int x, int y, int w, int h, int b, int[] iArray,
+ DataBuffer data)
+ {
+ if (iArray == null) iArray = new int[w*h];
+ int outOffset = 0;
+ int maxX = x + w;
+ int maxY = y + h;
+ for (int yy = y; yy < maxY; yy++)
+ {
+ for (int xx = x; xx < maxX; xx++)
+ {
+ int offset = bandOffsets[b] + yy * scanlineStride + xx;
+ iArray[outOffset++] =
+ data.getElem(bankIndices[b], offset);
+ }
+ }
+ return iArray;
+ }
+
+
+ /**
+ * Set the pixel at x, y to the value in the first element of the primitive
+ * array obj.
+ *
+ * @param x The x-coordinate of the data elements in <code>obj</code>.
+ * @param y The y-coordinate of the data elements in <code>obj</code>.
+ * @param obj The primitive array containing the data elements to set.
+ * @param data The DataBuffer to store the data elements into.
+ * @see java.awt.image.SampleModel#setDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer)
+ */
+ public void setDataElements(int x, int y, Object obj, DataBuffer data)
+ {
+ int transferType = getTransferType();
+ if (getTransferType() != data.getDataType())
+ {
+ throw new IllegalArgumentException("transfer type ("+
+ getTransferType()+"), "+
+ "does not match data "+
+ "buffer type (" +
+ data.getDataType() +
+ ").");
+ }
+
+ int offset = y * scanlineStride + x;
+
+ try
+ {
+ switch (transferType)
+ {
+ case DataBuffer.TYPE_BYTE:
+ {
+ DataBufferByte out = (DataBufferByte) data;
+ byte[] in = (byte[]) obj;
+ for (int i=0; i < numBands; i++)
+ out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
+ return;
+ }
+ case DataBuffer.TYPE_SHORT:
+ {
+ DataBufferShort out = (DataBufferShort) data;
+ short[] in = (short[]) obj;
+ for (int i=0; i < numBands; i++)
+ out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
+ return;
+ }
+ case DataBuffer.TYPE_USHORT:
+ {
+ DataBufferUShort out = (DataBufferUShort) data;
+ short[] in = (short[]) obj;
+ for (int i=0; i < numBands; i++)
+ out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
+ return;
+ }
+ case DataBuffer.TYPE_INT:
+ {
+ DataBufferInt out = (DataBufferInt) data;
+ int[] in = (int[]) obj;
+ for (int i=0; i < numBands; i++)
+ out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
+ return;
+ }
+ case DataBuffer.TYPE_FLOAT:
+ {
+ DataBufferFloat out = (DataBufferFloat) data;
+ float[] in = (float[]) obj;
+ for (int i=0; i < numBands; i++)
+ out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
+ return;
+ }
+ case DataBuffer.TYPE_DOUBLE:
+ {
+ DataBufferDouble out = (DataBufferDouble) data;
+ double[] in = (double[]) obj;
+ for (int i=0; i < numBands; i++)
+ out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
+ return;
+ }
+ default:
+ throw new ClassCastException("Unsupported data type");
+ }
+ }
+ catch (ArrayIndexOutOfBoundsException aioobe)
+ {
+ String msg = "While writing data elements" +
+ ", x="+x+", y="+y+
+ ", width="+width+", height="+height+
+ ", scanlineStride="+scanlineStride+
+ ", offset="+offset+
+ ", data.getSize()="+data.getSize()+
+ ", data.getOffset()="+data.getOffset()+
+ ": " +
+ aioobe;
+ throw new ArrayIndexOutOfBoundsException(msg);
+ }
+ }
+
+ public void setPixel(int x, int y, int[] iArray, DataBuffer data)
+ {
+ for (int b=0; b < numBands; b++)
+ data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x,
+ iArray[b]);
+ }
+
+ public void setPixels(int x, int y, int w, int h, int[] iArray,
+ DataBuffer data)
+ {
+ int inOffset = 0;
+ for (int hh = 0; hh < h; hh++)
+ {
+ for (int ww = 0; ww < w; ww++)
+ {
+ int offset = y * scanlineStride + (x + ww);
+ for (int b=0; b < numBands; b++)
+ data.setElem(bankIndices[b], bandOffsets[b] + offset,
+ iArray[inOffset++]);
+ }
+ y++;
+ }
+ }
+
+ public void setSample(int x, int y, int b, int s, DataBuffer data)
+ {
+ data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
+ }
+
+ public void setSample(int x, int y, int b, float s, DataBuffer data)
+ {
+ data.setElemFloat(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
+ }
+
+ public void setSample(int x, int y, int b, double s, DataBuffer data)
+ {
+ data.setElemDouble(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
+ }
+
+ public void setSamples(int x, int y, int w, int h, int b, int[] iArray,
+ DataBuffer data)
+ {
+ int inOffset = 0;
+
+ switch (getTransferType())
+ {
+ case DataBuffer.TYPE_BYTE:
+ {
+ DataBufferByte out = (DataBufferByte) data;
+ byte[] 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] = (byte)iArray[inOffset++];
+ }
+ y++;
+ }
+ return;
+ }
+ case DataBuffer.TYPE_SHORT:
+ {
+ DataBufferShort out = (DataBufferShort) data;
+ short[] 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] = (short)iArray[inOffset++];
+ }
+ y++;
+ }
+ return;
+ }
+ case DataBuffer.TYPE_USHORT:
+ {
+ DataBufferShort out = (DataBufferShort) data;
+ short[] 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] = (short)iArray[inOffset++];
+ }
+ y++;
+ }
+ return;
+ }
+ case DataBuffer.TYPE_INT:
+ {
+ 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();
+ }
+}
OSDN Git Service
