gcc/libjava/classpath/java/awt/image/WritableRaster.java

/* Copyright (C) 2000, 2002, 2003, 2006,  Free Software Foundation

This file is part of GNU Classpath.

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package java.awt.image;

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

/**
 * A raster with methods to support updating pixel values.
 * 
 * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
 */
public class WritableRaster extends Raster
{
  /**
   * Creates a new <code>WritableRaster</code>.
   * 
   * @param sampleModel  the sample model.
   * @param origin  the origin.
   */
  protected WritableRaster(SampleModel sampleModel, Point origin) 
  {
    this(sampleModel, sampleModel.createDataBuffer(), origin);
  }
  
  /**
   * Creates a new <code>WritableRaster</code> instance.
   * 
   * @param sampleModel  the sample model.
   * @param dataBuffer  the data buffer.
   * @param origin  the origin.
   */
  protected WritableRaster(SampleModel sampleModel, DataBuffer dataBuffer, 
                           Point origin)
  {
    this(sampleModel, dataBuffer,
         new Rectangle(origin != null ? origin.x : 0,
                       origin != null ? origin.y : 0,
                       sampleModel.getWidth(), sampleModel.getHeight()),
         origin, null);
  }

  /**
   * Creates a new <code>WritableRaster</code> instance.
   * 
   * @param sampleModel  the sample model.
   * @param dataBuffer  the data buffer.
   * @param aRegion  the raster's bounds.
   * @param sampleModelTranslate  the translation.
   * @param parent  the parent.
   */
  protected WritableRaster(SampleModel sampleModel, 
                           DataBuffer dataBuffer,
                           Rectangle aRegion,
                           Point sampleModelTranslate,
                           WritableRaster parent)
  {
    super(sampleModel, dataBuffer, aRegion, sampleModelTranslate, parent);
  }

  /**
   * Returns the raster's parent, cast as a {@link WritableRaster}.
   * 
   * @return The raster's parent.
   */
  public WritableRaster getWritableParent()
  {
    return (WritableRaster) getParent();
  }
  
  /**
   * @param childMinX
   * @param childMinY
   * @return
   */
  public WritableRaster createWritableTranslatedChild(int childMinX,
                                                      int childMinY)
  {
    // This mirrors the code from the super class
    int tcx = sampleModelTranslateX - minX + childMinX;
    int tcy = sampleModelTranslateY - minY + childMinY;
    
    return new WritableRaster(sampleModel, dataBuffer,
        new Rectangle(childMinX, childMinY, width, height), 
        new Point(tcx, tcy), this);
  }

  /**
   * 
   * @param parentX
   * @param parentY
   * @param w
   * @param h
   * @param childMinX
   * @param childMinY
   * @param bandList
   * @return
   */
  public WritableRaster createWritableChild(int parentX, int parentY,
      int w, int h, int childMinX, int childMinY, int[] bandList)
  {
    // This mirrors the code from the super class
    
    if (parentX < minX || parentX + w > minX + width
        || parentY < minY || parentY + h > minY + height)
      throw new RasterFormatException("Child raster extends beyond parent");
    
    SampleModel sm = (bandList == null) ?
      sampleModel :
      sampleModel.createSubsetSampleModel(bandList);
    
    return new WritableRaster(sm, dataBuffer,
        new Rectangle(childMinX, childMinY, w, h),
        new Point(sampleModelTranslateX + childMinX - parentX,
                  sampleModelTranslateY + childMinY - parentY),
        this);
  }
  
  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);

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

  public void setDataElements(int x, int y, Object inData)
  {
    sampleModel.setDataElements(x - sampleModelTranslateX, 
        y - sampleModelTranslateY, inData, dataBuffer);
  }

  public void setDataElements(int x, int y, Raster inRaster)
  {
    Object dataElements = getDataElements(0, 0, inRaster.getWidth(),
        inRaster.getHeight(), null);
    setDataElements(x, y, dataElements);
  }

  public void setDataElements(int x, int y, int w, int h, Object inData)
  {
    sampleModel.setDataElements(x - sampleModelTranslateX,
        y - sampleModelTranslateY, w, h, inData, dataBuffer);
  }

  /**
   * 
   * @param srcRaster
   */
  public void setRect(Raster srcRaster)
  {
    setRect(0, 0, srcRaster);
  }

  /**
   * 
   * @param dx
   * @param dy
   * @param srcRaster
   */
  public void setRect(int dx, int dy, Raster srcRaster) 
  {
    Rectangle targetUnclipped = new Rectangle(srcRaster.getMinX() + dx,
        srcRaster.getMinY() + dy, srcRaster.getWidth(), srcRaster.getHeight());
        
    Rectangle target = getBounds().intersection(targetUnclipped);

    if (target.isEmpty()) return;
    
    int sx = target.x - dx;
    int sy = target.y - dy;
    
    // FIXME: Do tests on rasters and use get/set data instead.
    
    /* The JDK documentation seems to imply this implementation.
       (the trucation of higher bits), but an implementation using
       get/setDataElements would be more efficient. None of the
       implementations would do anything sensible when the sample
       models don't match.
       
       But this is probably not the place to consider such
       optimizations.*/

    int[] pixels = srcRaster.getPixels(sx, sy, target.width, target.height,
                                       (int[]) null);

    setPixels(target.x, target.y, target.width, target.height, pixels);
  }

  /**
   * Sets the samples for the pixel at (x, y) in the raster to the specified 
   * values. 
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param iArray  the sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>iArray</code> is <code>null</code>.
   */
  public void setPixel(int x, int y, int[] iArray)
  {
    sampleModel.setPixel(x - sampleModelTranslateX, y - sampleModelTranslateY,
                         iArray, dataBuffer);
  }

  /**
   * Sets the samples for the pixel at (x, y) in the raster to the specified 
   * values. 
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param fArray  the sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>fArray</code> is <code>null</code>.
   */
  public void setPixel(int x, int y, float[] fArray)
  {
    sampleModel.setPixel(x - sampleModelTranslateX, y - sampleModelTranslateY,
                         fArray, dataBuffer);
  }

  /**
   * Sets the samples for the pixel at (x, y) in the raster to the specified 
   * values. 
   * 
   * @param x  the x-coordinate of the pixel.
   * @param y  the y-coordinate of the pixel.
   * @param dArray  the sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>dArray</code> is <code>null</code>.
   */
  public void setPixel(int x, int y, double[] dArray)
  {
    sampleModel.setPixel(x - sampleModelTranslateX, y - sampleModelTranslateY,
                         dArray, dataBuffer);
  }

  /**
   * Sets the sample values 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). 
   *  
   * @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  the pixel sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>iArray</code> is <code>null</code>.
   */
  public void setPixels(int x, int y, int w, int h, int[] iArray)
  {
    sampleModel.setPixels(x - sampleModelTranslateX, y - sampleModelTranslateY,
                          w, h, iArray, dataBuffer);
  }

  /**
   * Sets the sample values 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). 
   *  
   * @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  the pixel sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>fArray</code> is <code>null</code>.
   */
  public void setPixels(int x, int y, int w, int h, float[] fArray)
  {
    sampleModel.setPixels(x - sampleModelTranslateX, y - sampleModelTranslateY,
                          w, h, fArray, dataBuffer);
  }

  /**
   * Sets the sample values 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). 
   *  
   * @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  the pixel sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>dArray</code> is <code>null</code>.
   */
  public void setPixels(int x, int y, int w, int h, double[] dArray)
  {
    sampleModel.setPixels(x - sampleModelTranslateX, y - sampleModelTranslateY,
                          w, h, dArray, dataBuffer);
  }

  /**
   * Sets the sample value for a band 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>).
   * @param s  the sample value.
   */
  public void setSample(int x, int y, int b, int s)
  {
    sampleModel.setSample(x - sampleModelTranslateX, y - sampleModelTranslateY,
                          b, s, dataBuffer);
  }

  /**
   * Sets the sample value for a band 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>).
   * @param s  the sample value.
   */
  public void setSample(int x, int y, int b, float s)
  {
    sampleModel.setSample(x - sampleModelTranslateX, y - sampleModelTranslateY,
                          b, s, dataBuffer);
  }

  /**
   * Sets the sample value for a band 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>).
   * @param s  the sample value.
   */
  public void setSample(int x, int y, int b, double s)
  {
    sampleModel.setSample(x - sampleModelTranslateX, y - sampleModelTranslateY,
                          b, s, dataBuffer);
  }

  /**
   * Sets the sample values for one band for the pixels in the region 
   * specified by (x, y, w, h) in the raster. 
   * 
   * @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  the sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>iArray</code> is <code>null</code>.
   */
  public void setSamples(int x, int y, int w, int h, int b,
                         int[] iArray)
  {
    sampleModel.setSamples(x - sampleModelTranslateX, y - sampleModelTranslateY,
                           w, h, b, iArray, dataBuffer);
  }

  /**
   * Sets the sample values for one band for the pixels in the region 
   * specified by (x, y, w, h) in the raster. 
   * 
   * @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  the sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>fArray</code> is <code>null</code>.
   */
  public void setSamples(int x, int y, int w, int h, int b,
                         float[] fArray)
  {
    sampleModel.setSamples(x - sampleModelTranslateX, y - sampleModelTranslateY,
                           w, h, b, fArray, dataBuffer);
  }

  /**
   * Sets the sample values for one band for the pixels in the region 
   * specified by (x, y, w, h) in the raster. 
   * 
   * @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  the sample values (<code>null</code> not permitted).
   * 
   * @throws NullPointerException if <code>dArray</code> is <code>null</code>.
   */
  public void setSamples(int x, int y, int w, int h, int b,
                         double[] dArray)
  {
    sampleModel.setSamples(x - sampleModelTranslateX, y - sampleModelTranslateY,
                           w, h, b, dArray, dataBuffer);
  }
}