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Raster.java

/* Copyright (C) 2000, 2002, 2003, 2006,  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.

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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
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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
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package java.awt.image;

import java.awt.Point;
import java.awt.Rectangle;

import sun.awt.image.ByteBandedRaster;
import sun.awt.image.ByteComponentRaster;
import sun.awt.image.ByteInterleavedRaster;
import sun.awt.image.BytePackedRaster;
import sun.awt.image.IntegerComponentRaster;
import sun.awt.image.IntegerInterleavedRaster;
import sun.awt.image.ShortBandedRaster;
import sun.awt.image.ShortComponentRaster;
import sun.awt.image.ShortInterleavedRaster;
import sun.awt.image.SunWritableRaster;


/**
 * A rectangular collection of pixels composed from a {@link DataBuffer} which
 * stores the pixel values, and a {@link SampleModel} which is used to retrieve
 * the pixel values.
 * 
 * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
 */
00062 public class Raster
{
  /** The sample model used to access the pixel values. */
00065   protected SampleModel sampleModel;
  
  /** The data buffer used to store the pixel values. */
00068   protected DataBuffer dataBuffer;
  
  /** The x-coordinate of the top left corner of the raster. */
00071   protected int minX;
  
  /** The y-coordinate of the top left corner of the raster. */
00074   protected int minY;
  
  /** The width of the raster. */
00077   protected int width;
  
  /** The height of the raster. */
00080   protected int height;
  
  protected int sampleModelTranslateX;
  
  protected int sampleModelTranslateY;
  
  /** The number of bands. */
00087   protected int numBands;
  
  protected int numDataElements;
  
  /** The raster's parent. */
00092   protected Raster parent;
  
  static private native void initIDs();
  static
    {
      ColorModel.loadLibraries();
      initIDs();
    }

  /**
   * Creates a new raster.
   * 
   * @param sampleModel  the sample model.
   * @param origin  the origin.
   */
00107   protected Raster(SampleModel sampleModel, Point origin)
  {
    this(sampleModel, sampleModel.createDataBuffer(), origin);
  }
  
  /**
   * Creates a new raster.
   * 
   * @param sampleModel  the sample model.
   * @param dataBuffer  the data buffer.
   * @param origin  the origin.
   */
00119   protected Raster(SampleModel sampleModel, DataBuffer dataBuffer,
                   Point origin)
  {
    this(sampleModel, dataBuffer, new Rectangle(origin.x, origin.y,
         sampleModel.getWidth(), sampleModel.getHeight()), origin, null);
  }

  /**
   * Creates a new raster.
   * 
   * @param sampleModel  the sample model.
   * @param dataBuffer  the data buffer.
   * @param aRegion  the raster's bounds.
   * @param sampleModelTranslate  the translation (<code>null</code> permitted).
   * @param parent  the raster's parent.
   */
00135   protected Raster(SampleModel sampleModel, DataBuffer dataBuffer,
      Rectangle aRegion, Point sampleModelTranslate, Raster parent)
  {
    this.sampleModel = sampleModel;
    this.dataBuffer = dataBuffer;
    this.minX = aRegion.x;
    this.minY = aRegion.y;
    this.width = aRegion.width;
    this.height = aRegion.height;
    
    // If sampleModelTranslate is null, use (0,0).  Methods such as
    // Raster.createRaster are specified to allow for a null argument.
    if (sampleModelTranslate != null)
    {
      this.sampleModelTranslateX = sampleModelTranslate.x;
      this.sampleModelTranslateY = sampleModelTranslate.y;
    }

    this.numBands = sampleModel.getNumBands();
    this.numDataElements = sampleModel.getNumDataElements();
    this.parent = parent;
  }
    
  /**
   * Creates an interleaved raster using the specified data type.
   * 
   * @param dataType  the data type.
   * @param w  the width.
   * @param h  the height.
   * @param bands  the number of bands.
   * @param location
   * 
   * @return The new raster.
   */
00169   public static WritableRaster createInterleavedRaster(int dataType,
      int w, int h, int bands, Point location)
  {
    int[] bandOffsets = new int[bands];
    // TODO: Maybe not generate this every time.
    for (int b = 0; b < bands; b++) 
      bandOffsets[b] = b;
    
    int scanlineStride = bands * w;
    return createInterleavedRaster(dataType, w, h, scanlineStride, bands,
                                   bandOffsets, location);
  }

  /**
   * Creates an interleaved raster.
   * 
   * @param dataType  the data type.
   * @param w  the width.
   * @param h  the height.
   * @param scanlineStride  the number of data elements from a sample on one 
   *     row to the corresponding sample on the next row.
   * @param pixelStride  the number of elements from a sample in one pixel to
   *     the corresponding sample in the next pixel.
   * @param bandOffsets  the band offsets.
   * @param location
   * 
   * @return The new raster.
   */
00197   public static WritableRaster createInterleavedRaster(int dataType, 
      int w, int h, int scanlineStride, int pixelStride, int[] bandOffsets,
      Point location)
  {
    SampleModel sm = new PixelInterleavedSampleModel(dataType, w, h, pixelStride,
        scanlineStride, bandOffsets);

    if (location == null)
      location = new Point(0,0);

    if (dataType == DataBuffer.TYPE_BYTE)
      return new ByteInterleavedRaster(sm, location);
    else if (dataType == DataBuffer.TYPE_SHORT)
      return new ShortInterleavedRaster(sm, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }

  /**
   * Creates a new banded raster.
   * 
   * @param dataType  the data type.
   * @param w  the width.
   * @param h  the height.
   * @param bands  the number of bands.
   * @param location  
   * 
   * @return The new raster.
   */
00226   public static WritableRaster createBandedRaster(int dataType, int w, int h, 
      int bands, Point location)
  {
    SampleModel sm = new BandedSampleModel(dataType, w, h, bands);

    if (location == null)
      location = new Point(0,0);

    if (dataType == DataBuffer.TYPE_BYTE)
      return new ByteBandedRaster(sm, location);
    else if (dataType == DataBuffer.TYPE_USHORT)
      return new ShortBandedRaster(sm, location);
    else if (dataType == DataBuffer.TYPE_INT)
      return new SunWritableRaster(sm, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }

  /**
   * Creates a new banded raster.
   * 
   * @param dataType  the data type.
   * @param w  the width.
   * @param h  the height.
   * @param scanlineStride  the number of data elements from a sample on one 
   *     row to the corresponding sample on the next row.
   * @param bankIndices  the index for each bank.
   * @param bandOffsets  the offset for each band.
   * @param location
   * 
   * @return The new raster.
   */
00258   public static WritableRaster createBandedRaster(int dataType, int w, int h,
      int scanlineStride, int[] bankIndices, int[] bandOffsets, Point location)
  {
    SampleModel sm = new BandedSampleModel(dataType, w, h, scanlineStride,
                                           bankIndices, bandOffsets);

    if (location == null)
      location = new Point(0,0);

    if (dataType == DataBuffer.TYPE_BYTE)
      return new ByteBandedRaster(sm, location);
    else if (dataType == DataBuffer.TYPE_USHORT)
      return new ShortBandedRaster(sm, location);
    else if (dataType == DataBuffer.TYPE_INT)
      return new SunWritableRaster(sm, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }
  
  /**
   * Creates a new packed raster.
   * 
   * @param dataType  the data type.
   * @param w  the width.
   * @param h  the height.
   * @param bandMasks  the bit mask for each band.
   * @param location 
   * 
   * @return The new raster.
   */
00288   public static WritableRaster createPackedRaster(int dataType, int w, int h,
      int[] bandMasks, Point location)
  {
    SampleModel sm = new SinglePixelPackedSampleModel(dataType, w, h,
                                                     bandMasks);

    if (location == null)
      location = new Point(0,0);

    if (dataType == DataBuffer.TYPE_BYTE)
      return new ByteInterleavedRaster(sm, location);
    else if (dataType == DataBuffer.TYPE_USHORT)
      return new ShortInterleavedRaster(sm, location);
    else if (dataType == DataBuffer.TYPE_INT)
      return new IntegerInterleavedRaster(sm, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }

  /**
   * Creates a new raster.
   * 
   * @param dataType  the data type.
   * @param w  the width.
   * @param h  the height.
   * @param bands  the number of bands.
   * @param bitsPerBand  the number of bits per band.
   * @param location
   * 
   * @return The new raster.
   */
00319   public static WritableRaster createPackedRaster(int dataType,
      int w, int h, int bands, int bitsPerBand, Point location)
  {
    if (bands <= 0 || (bands * bitsPerBand > getTypeBits(dataType)))
      throw new IllegalArgumentException();

    if (location == null)
      location = new Point(0,0);

    if (bands == 1)
      {
        SampleModel sm = new MultiPixelPackedSampleModel(dataType, w, h, bitsPerBand);

        if (dataType == DataBuffer.TYPE_BYTE)
          return new ByteInterleavedRaster(sm, location);
        else if (dataType == DataBuffer.TYPE_USHORT || dataType == DataBuffer.TYPE_INT)
          return new SunWritableRaster(sm, location);
        else
          throw new IllegalArgumentException("Data type is not supported.");
      }
    else
      {
        int[] bandMasks = new int[bands];
        int mask = 0x1;
        for (int bits = bitsPerBand; --bits != 0;)
          mask = (mask << 1) | 0x1;
        for (int i = 0; i < bands; i++)
          {
            bandMasks[i] = mask;
            mask <<= bitsPerBand;
          }
          
        SampleModel sm = new SinglePixelPackedSampleModel(dataType, w, h, bandMasks);

        if (dataType == DataBuffer.TYPE_BYTE)
          return new ByteInterleavedRaster(sm, location);
        else if (dataType == DataBuffer.TYPE_USHORT)
          return new ShortInterleavedRaster(sm, location);
        else if (dataType == DataBuffer.TYPE_INT)
          return new IntegerInterleavedRaster(sm, location);
        else
          throw new IllegalArgumentException("Data type is not supported.");
      }
  }

  /**
   * Creates a new interleaved raster.
   * 
   * @param dataBuffer  the data buffer.
   * @param w  the width.
   * @param h  the height.
   * @param scanlineStride  the number of data elements from a sample on one 
   *     row to the corresponding sample on the next row.
   * @param pixelStride  the number of elements from a sample in one pixel to
   *     the corresponding sample in the next pixel.
   * @param bandOffsets  the offset for each band.
   * @param location
   * 
   * @return The new raster.
   */
00379   public static WritableRaster createInterleavedRaster(DataBuffer dataBuffer, 
      int w, int h, int scanlineStride, int pixelStride, int[] bandOffsets, 
      Point location)
  {
    SampleModel sm = new PixelInterleavedSampleModel(dataBuffer.getDataType(),
        w, h, pixelStride, scanlineStride, bandOffsets);

    if (location == null)
      location = new Point(0,0);

    if (dataBuffer.getDataType() == DataBuffer.TYPE_BYTE)
      return new ByteInterleavedRaster(sm, dataBuffer, location);
    else if (dataBuffer.getDataType() == DataBuffer.TYPE_USHORT)
      return new ShortInterleavedRaster(sm, dataBuffer, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }

  /**
   * Creates a new banded raster.
   * 
   * @param dataBuffer  the data buffer.
   * @param w  the width.
   * @param h  the height.
   * @param scanlineStride  the number of data elements from a sample on one 
   *     row to the corresponding sample on the next row.
   * @param bankIndices  the index for each bank.
   * @param bandOffsets  the band offsets.
   * @param location
   * 
   * @return The new raster.
   */
00411   public static WritableRaster createBandedRaster(DataBuffer dataBuffer,
      int w, int h, int scanlineStride, int[] bankIndices, int[] bandOffsets,
      Point location)
  {
    SampleModel sm = new BandedSampleModel(dataBuffer.getDataType(),
        w, h, scanlineStride, bankIndices, bandOffsets);

    if (location == null)
      location = new Point(0,0);

    if (dataBuffer.getDataType() == DataBuffer.TYPE_BYTE)
      return new ByteBandedRaster(sm, dataBuffer, location);
    else if (dataBuffer.getDataType() == DataBuffer.TYPE_USHORT)
      return new ShortBandedRaster(sm, dataBuffer, location);
    else if (dataBuffer.getDataType() == DataBuffer.TYPE_INT)
      return new SunWritableRaster(sm, dataBuffer, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }
  
  /**
   * Creates a new packed raster.
   * 
   * @param dataBuffer  the data buffer.
   * @param w  the width.
   * @param h  the height.
   * @param scanlineStride  the number of data elements from a sample on one 
   *     row to the corresponding sample on the next row.
   * @param bandMasks  the bit mask for each band.
   * @param location
   * 
   * @return The new raster.
   */
00444   public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
      int w, int h, int scanlineStride, int[] bandMasks, Point location)
 {
    SampleModel sm = new SinglePixelPackedSampleModel(dataBuffer.getDataType(),
        w, h, scanlineStride, bandMasks);

    if (location == null)
      location = new Point(0,0);

    if (dataBuffer.getDataType() == DataBuffer.TYPE_BYTE)
      return new ByteInterleavedRaster(sm, dataBuffer, location);
    else if (dataBuffer.getDataType() == DataBuffer.TYPE_USHORT)
      return new ShortInterleavedRaster(sm, dataBuffer, location);
    else if (dataBuffer.getDataType() == DataBuffer.TYPE_INT)
      return new IntegerInterleavedRaster(sm, dataBuffer, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }
  
  /**
   * Creates a new packed raster.
   * 
   * @param dataBuffer  the data buffer.
   * @param w  the width.
   * @param h  the height.
   * @param bitsPerPixel  the number of bits per pixel.
   * @param location
   * 
   * @return The new raster.
   */
00474   public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
      int w, int h, int bitsPerPixel, Point location)
  {
    SampleModel sm = new MultiPixelPackedSampleModel(dataBuffer.getDataType(),
        w, h, bitsPerPixel);  

    if (location == null)
      location = new Point(0,0);

    if (dataBuffer.getDataType() == DataBuffer.TYPE_BYTE)
      return new ByteInterleavedRaster(sm, dataBuffer, location);
    else if (dataBuffer.getDataType() == DataBuffer.TYPE_USHORT 
      || dataBuffer.getDataType() == DataBuffer.TYPE_INT)
      return new SunWritableRaster(sm, dataBuffer, location);
    else
      throw new IllegalArgumentException("Data type is not supported.");
  }
    
  /**
   * Creates a new raster.
   * 
   * @param sm  the sample model.
   * @param db  the data buffer.
   * @param location
   * 
   * @return The new raster.
   */
00501   public static Raster createRaster(SampleModel sm, DataBuffer db,
                                    Point location)
  {
    return new Raster(sm, db, location);
  }

  /**
   * Creates a new writable raster.
   * 
   * @param sm  the sample model.
   * @param location
   * 
   * @return The new writable raster.
   */
00515   public static WritableRaster createWritableRaster(SampleModel sm,
                                                    Point location)
  {
    if (sm instanceof PixelInterleavedSampleModel)
      {
        if (sm.dataType == DataBuffer.TYPE_BYTE)
          return new ByteInterleavedRaster(sm, location);
        else if (sm.dataType == DataBuffer.TYPE_SHORT)
          return new ShortInterleavedRaster(sm, location);
      }
    else if (sm instanceof BandedSampleModel)
      {
        if (sm.dataType == DataBuffer.TYPE_BYTE)
          return new ByteBandedRaster(sm, location);
        else if (sm.dataType == DataBuffer.TYPE_USHORT)
          return new ShortBandedRaster(sm, location);
      }
    else if (sm instanceof SinglePixelPackedSampleModel
             || sm instanceof MultiPixelPackedSampleModel)
      {
        if (sm.numBands == 1)
          {
            if (sm.dataType == DataBuffer.TYPE_BYTE)
              return new BytePackedRaster(sm, location);
          }
        else
          {
            if (sm.dataType == DataBuffer.TYPE_BYTE)
              return new ByteInterleavedRaster(sm, location);
            else if (sm.dataType == DataBuffer.TYPE_USHORT)
              return new ShortInterleavedRaster(sm, location);
            else if (sm.dataType == DataBuffer.TYPE_INT)
              return new IntegerInterleavedRaster(sm, location);
          }
      }

    return new SunWritableRaster(sm, location);
  }

  /**
   * Creates a new writable raster.
   * 
   * @param sm  the sample model.
   * @param db  the data buffer.
   * @param location 
   * 
   * @return The new writable raster.
   */
00563   public static WritableRaster createWritableRaster(SampleModel sm,
      DataBuffer db, Point location)
  {
    if (sm instanceof PixelInterleavedSampleModel)
      {
        if (sm.dataType == DataBuffer.TYPE_BYTE)
          return new ByteInterleavedRaster(sm, db, location);
        else if (sm.dataType == DataBuffer.TYPE_SHORT)
          return new ShortInterleavedRaster(sm, db, location);
      }
    else if (sm instanceof BandedSampleModel)
      {
        if (sm.dataType == DataBuffer.TYPE_BYTE)
          return new ByteBandedRaster(sm, db, location);
        else if (sm.dataType == DataBuffer.TYPE_USHORT)
          return new ShortBandedRaster(sm, db, location);
      }
    else if (sm instanceof SinglePixelPackedSampleModel
             || sm instanceof MultiPixelPackedSampleModel)
      {
        if (sm.numBands == 1)
          {
            if (sm.dataType == DataBuffer.TYPE_BYTE)
              return new BytePackedRaster(sm, db, location);
          }
        else
          {
            if (sm.dataType == DataBuffer.TYPE_BYTE)
              return new ByteInterleavedRaster(sm, db, location);
            else if (sm.dataType == DataBuffer.TYPE_USHORT)
              return new ShortInterleavedRaster(sm, db, location);
            else if (sm.dataType == DataBuffer.TYPE_INT)
              return new IntegerInterleavedRaster(sm, db, location);
          }
      }

    return new SunWritableRaster(sm, db, location);
  }

  /**
   * Returns the raster's parent.
   * 
   * @return The raster's parent.
   */
00607   public Raster getParent()
  {
    return parent;
  }

  /**
   * Returns the x-translation.
   * 
   * @return The x-translation.
   */
00617   public final int getSampleModelTranslateX()
  {
    return sampleModelTranslateX;
  }

  /**
   * Returns the y-translation.
   * 
   * @return The y-translation.
   */
00627   public final int getSampleModelTranslateY()
  {
    return sampleModelTranslateY;
  }

  /**
   * Creates a new writable raster that is compatible with this raster.
   * 
   * @return A new writable raster.
   */
00637   public WritableRaster createCompatibleWritableRaster()
  {
    return new SunWritableRaster(getSampleModel(), new Point(minX, minY));
  }

  /**
   * Creates a new writable raster that is compatible with this raster.
   * 
   * @param w  the width.
   * @param h  the height.
   * 
   * @return A new writable raster.
   */
00650   public WritableRaster createCompatibleWritableRaster(int w, int h)
  {
    return createCompatibleWritableRaster(minX, minY, w, h);
  }

  /**
   * Creates a new writable raster that is compatible with this raster, with
   * the specified bounds.
   * 
   * @param rect  the raster bounds.
   * 
   * @return A new writable raster.
   */
00663   public WritableRaster createCompatibleWritableRaster(Rectangle rect)
  {
    return createCompatibleWritableRaster(rect.x, rect.y,
                                          rect.width, rect.height);
  }

  /**
   * Creates a new writable raster that is compatible with this raster, with
   * the specified bounds.
   * 
   * @param x  the x-coordinate of the top-left corner of the raster.
   * @param y  the y-coordinate of the top-left corner of the raster.
   * @param w  the raster width.
   * @param h  the raster height.
   * 
   * @return A new writable raster.
   */
00680   public WritableRaster createCompatibleWritableRaster(int x, int y,
                                                       int w, int h)
  {
    SampleModel sm = getSampleModel().createCompatibleSampleModel(w, h);
    return new SunWritableRaster(sm, sm.createDataBuffer(), new Point(x, y));
  }

  public Raster createTranslatedChild(int childMinX, int childMinY) {
    return createChild(minX, minY, width, height, childMinX, childMinY, null);
  }

  public Raster createChild(int parentX, int parentY, int width,
                            int height, int childMinX, int childMinY,
                            int[] bandList)
  {
    if (parentX < minX || parentX + width > minX + this.width
        || parentY < minY || parentY + height > minY + this.height)
      throw new RasterFormatException("Child raster extends beyond parent");
    
    SampleModel sm = (bandList == null) ?
      sampleModel :
      sampleModel.createSubsetSampleModel(bandList);

    /*
        data origin
       /
      +-------------------------
      |\. __ parent trans
      | \`.  
      |  \ `.    parent origin
      |   \  `. /
      |   /\   +-------- - -
      |trans\ /<\-- deltaTrans
      |child +-+-\---- - - 
      |     /|`|  \__ parent [x, y]
      |child | |`. \
      |origin| :  `.\
      |      |    / `\
      |      :   /    +
      | child [x, y] 

      parent_xy - parent_trans = child_xy - child_trans

      child_trans = parent_trans + child_xy - parent_xy
    */

    return new Raster(sm, dataBuffer,
        new Rectangle(childMinX, childMinY, width, height),
        new Point(sampleModelTranslateX + childMinX - parentX,
                  sampleModelTranslateY + childMinY - parentY),
        this);
  }

  /**
   * Returns a new rectangle containing the bounds of this raster.
   * 
   * @return A new rectangle containing the bounds of this raster.
   */
00738   public Rectangle getBounds()
  {
    return new Rectangle(minX, minY, width, height);
  }

  /**
   * Returns the x-coordinate of the top left corner of the raster.
   * 
   * @return The x-coordinate of the top left corner of the raster.
   */
00748   public final int getMinX()
  {
    return minX;
  }

  /**
   * Returns the t-coordinate of the top left corner of the raster.
   * 
   * @return The t-coordinate of the top left corner of the raster.
   */
00758   public final int getMinY()
  {
    return minY;
  }

  /**
   * Returns the width of the raster.
   * 
   * @return The width of the raster.
   */
00768   public final int getWidth()
  {
    return width;
  }

  /**
   * Returns the height of the raster.
   * 
   * @return The height of the raster.
   */
00778   public final int getHeight()
  {
    return height;
  }

  /**
   * Returns the number of bands for this raster.
   * 
   * @return The number of bands.
   */
00788   public final int getNumBands()
  {
    return numBands;
  }
    
  public final int getNumDataElements()
  {
    return numDataElements;
  }
  
  /**
   * Returns the transfer type for the raster (this is determined by the 
   * raster's sample model).
   * 
   * @return The transfer type.
   */
00804   public final int getTransferType()
  {
    return sampleModel.getTransferType();
  }

  /**
   * Returns the data buffer that stores the pixel data for this raster.
   * 
   * @return The data buffer.
   */
00814   public DataBuffer getDataBuffer()
  {
    return dataBuffer;
  }

  /**
   * Returns the sample model that accesses the data buffer (to extract pixel
   * data) for this raster.
   * 
   * @return The sample model.
   */
00825   public SampleModel getSampleModel()
  {
    return sampleModel;
  }

  public Object getDataElements(int x, int y, Object outData)
  {
    return sampleModel.getDataElements(x - sampleModelTranslateX,
        y - sampleModelTranslateY, outData, dataBuffer);
  }

  public Object getDataElements(int x, int y, int w, int h, Object outData)
  {
    return sampleModel.getDataElements(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, outData, dataBuffer);
  }

  /**
   * Returns an array containing the samples for the pixel at (x, y) in the
   * raster.  If <code>iArray</code> is not <code>null</code>, it will be 
   * populated with the sample values and returned as the result of
   * this function (this avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param iArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The pixel sample values.
   */
00855   public int[] getPixel(int x, int y, int[] iArray)
  {
    return sampleModel.getPixel(x - sampleModelTranslateX,
        y - sampleModelTranslateY, iArray, dataBuffer);
  }

  /**
   * Returns an array containing the samples for the pixel at (x, y) in the
   * raster.  If <code>fArray</code> is not <code>null</code>, it will be 
   * populated with the sample values and returned as the result of
   * this function (this avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param fArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The pixel sample values.
   */
00874   public float[] getPixel(int x, int y, float[] fArray)
  {
    return sampleModel.getPixel(x - sampleModelTranslateX,
        y - sampleModelTranslateY, fArray, dataBuffer);
  }

  /**
   * Returns an array containing the samples for the pixel at (x, y) in the
   * raster.  If <code>dArray</code> is not <code>null</code>, it will be 
   * populated with the sample values and returned as the result of
   * this function (this avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param dArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The pixel sample values.
   */
00893   public double[] getPixel(int x, int y, double[] dArray)
  {
    return sampleModel.getPixel(x - sampleModelTranslateX,
        y - sampleModelTranslateY, dArray, dataBuffer);
  }

  /**
   * Returns an array containing the samples for the pixels in the region 
   * specified by (x, y, w, h) in the raster.  The array is ordered by pixels 
   * (that is, all the samples for the first pixel are grouped together, 
   * followed by all the samples for the second pixel, and so on).  
   * If <code>iArray</code> is not <code>null</code>, it will be populated 
   * with the sample values and returned as the result of this function (this 
   * avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the top-left pixel.
   * @param y  the y-coordinate of the top-left pixel.
   * @param w  the width of the region of pixels.
   * @param h  the height of the region of pixels.
   * @param iArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The pixel sample values.
   */
00917   public int[] getPixels(int x, int y, int w, int h, int[] iArray)
  {
    return sampleModel.getPixels(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, iArray, dataBuffer);
  }

  /**
   * Returns an array containing the samples for the pixels in the region 
   * specified by (x, y, w, h) in the raster.  The array is ordered by pixels 
   * (that is, all the samples for the first pixel are grouped together, 
   * followed by all the samples for the second pixel, and so on).  
   * If <code>fArray</code> is not <code>null</code>, it will be populated 
   * with the sample values and returned as the result of this function (this 
   * avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the top-left pixel.
   * @param y  the y-coordinate of the top-left pixel.
   * @param w  the width of the region of pixels.
   * @param h  the height of the region of pixels.
   * @param fArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The pixel sample values.
   */
00941   public float[] getPixels(int x, int y, int w, int h, float[] fArray)
  {
    return sampleModel.getPixels(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, fArray, dataBuffer);
  }

  /**
   * Returns an array containing the samples for the pixels in the region 
   * specified by (x, y, w, h) in the raster.  The array is ordered by pixels 
   * (that is, all the samples for the first pixel are grouped together, 
   * followed by all the samples for the second pixel, and so on).  
   * If <code>dArray</code> is not <code>null</code>, it will be populated 
   * with the sample values and returned as the result of this function (this 
   * avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the top-left pixel.
   * @param y  the y-coordinate of the top-left pixel.
   * @param w  the width of the region of pixels.
   * @param h  the height of the region of pixels.
   * @param dArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The pixel sample values.
   */
00965   public double[] getPixels(int x, int y, int w, int h, double[] dArray)
  {
    return sampleModel.getPixels(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, dArray, dataBuffer);
  }

  /**
   * Returns the sample value for the pixel at (x, y) in the raster.
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param b  the band (in the range <code>0</code> to 
   *     <code>getNumBands() - 1</code>).
   * 
   * @return The sample value.
   */
00981   public int getSample(int x, int y, int b)
  {
    return sampleModel.getSample(x - sampleModelTranslateX,
        y - sampleModelTranslateY, b, dataBuffer);
  }

  /**
   * Returns the sample value for the pixel at (x, y) in the raster.
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param b  the band (in the range <code>0</code> to 
   *     <code>getNumBands() - 1</code>).
   * 
   * @return The sample value.
   * 
   * @see #getSample(int, int, int)
   */
00999   public float getSampleFloat(int x, int y, int b)
  {
    return sampleModel.getSampleFloat(x - sampleModelTranslateX,
        y - sampleModelTranslateY, b, dataBuffer);
  }

  /**
   * Returns the sample value for the pixel at (x, y) in the raster.
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param b  the band (in the range <code>0</code> to 
   *     <code>getNumBands() - 1</code>).
   * 
   * @return The sample value.
   * 
   * @see #getSample(int, int, int)
   */
01017   public double getSampleDouble(int x, int y, int b)
  {
    return sampleModel.getSampleDouble(x - sampleModelTranslateX,
        y - sampleModelTranslateY, b, dataBuffer);
  }

  /**
   * Returns an array containing the samples from one band for the pixels in 
   * the region specified by (x, y, w, h) in the raster.  If 
   * <code>iArray</code> is not <code>null</code>, it will be 
   * populated with the sample values and returned as the result of this 
   * function (this avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the top-left pixel.
   * @param y  the y-coordinate of the top-left pixel.
   * @param w  the width of the region of pixels.
   * @param h  the height of the region of pixels.
   * @param b  the band (in the range <code>0</code> to 
   *     </code>getNumBands() - 1</code>).
   * @param iArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The sample values.
   */
01041   public int[] getSamples(int x, int y, int w, int h, int b,
                          int[] iArray)
  {
    return sampleModel.getSamples(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, b, iArray, dataBuffer);
  }

  /**
   * Returns an array containing the samples from one band for the pixels in 
   * the region specified by (x, y, w, h) in the raster.  If 
   * <code>fArray</code> is not <code>null</code>, it will be 
   * populated with the sample values and returned as the result of this 
   * function (this avoids allocating a new array instance).
   *
   * @param x  the x-coordinate of the top-left pixel.
   * @param y  the y-coordinate of the top-left pixel.
   * @param w  the width of the region of pixels.
   * @param h  the height of the region of pixels.
   * @param b  the band (in the range <code>0</code> to 
   *     </code>getNumBands() - 1</code>).
   * @param fArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The sample values.
   */  
01066   public float[] getSamples(int x, int y, int w, int h, int b, float[] fArray)
  {
    return sampleModel.getSamples(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, b, fArray, dataBuffer);
  }

  /**
   * Returns an array containing the samples from one band for the pixels in 
   * the region specified by (x, y, w, h) in the raster.  If 
   * <code>dArray</code> is not <code>null</code>, it will be 
   * populated with the sample values and returned as the result of this 
   * function (this avoids allocating a new array instance).
   * 
   * @param x  the x-coordinate of the top-left pixel.
   * @param y  the y-coordinate of the top-left pixel.
   * @param w  the width of the region of pixels.
   * @param h  the height of the region of pixels.
   * @param b  the band (in the range <code>0</code> to 
   *     </code>getNumBands() - 1</code>).
   * @param dArray  an array to populate with the sample values and return as 
   *     the result (if <code>null</code>, a new array will be allocated).
   * 
   * @return The sample values.
   */
01090   public double[] getSamples(int x, int y, int w, int h, int b, 
                             double[] dArray)
  {
    return sampleModel.getSamples(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, b, dArray, dataBuffer);
  }
  
  /**
   * Create a String representing the state of this Raster.
   * 
   * @return A String representing the stat of this Raster.
   */
01102   public String toString()
  {
    StringBuffer result = new StringBuffer();
    
    result.append(getClass().getName());
    result.append("[(");
    result.append(minX).append(",").append(minY).append("), ");
    result.append(width).append(" x ").append(height).append(",");
    result.append(sampleModel).append(",");
    result.append(dataBuffer);
    result.append("]");
    
    return result.toString();
  }

  /**
   * Returns the number of bits used to represent the specified data type.  
   * Valid types are:
   * <ul>
   *   <li>{@link DataBuffer#TYPE_BYTE};</li>
   *   <li>{@link DataBuffer#TYPE_USHORT};</li>
   *   <li>{@link DataBuffer#TYPE_SHORT};</li>
   *   <li>{@link DataBuffer#TYPE_INT};</li>
   *   <li>{@link DataBuffer#TYPE_FLOAT};</li>
   *   <li>{@link DataBuffer#TYPE_DOUBLE};</li>
   * </ul>
   * This method returns 0 for invalid data types.
   * 
   * @param dataType  the data type.
   * 
   * @return The number of bits used to represent the specified data type.
   */
01134   private static int getTypeBits(int dataType)
  {
    switch (dataType)
      {
      case DataBuffer.TYPE_BYTE:
        return 8;
      case DataBuffer.TYPE_USHORT:
      case DataBuffer.TYPE_SHORT:
        return 16;
      case DataBuffer.TYPE_INT:
      case DataBuffer.TYPE_FLOAT:
        return 32;
      case DataBuffer.TYPE_DOUBLE:
        return 64;
      default:
        return 0;
      }
  }
}

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