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

/* Copyright (C) 2000, 2002  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
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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permission to link this library with independent modules to produce an
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package java.awt.image;

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

/**
 * @author Rolf W. Rasmussen <rolfwr@ii.uib.no>
 */
public class WritableRaster extends Raster
{
  protected WritableRaster(SampleModel sampleModel, Point origin) 
  {
    this(sampleModel, sampleModel.createDataBuffer(), origin);
  }
  
  protected WritableRaster(SampleModel sampleModel,
			   DataBuffer dataBuffer, Point origin)
  {
    this(sampleModel, dataBuffer,
	 new Rectangle(origin.x, origin.y,
		       sampleModel.getWidth(), sampleModel.getHeight()),
	 origin,
	 null);
  }

  protected WritableRaster(SampleModel sampleModel, 
			   DataBuffer dataBuffer,
			   Rectangle aRegion,
			   Point sampleModelTranslate,
			   WritableRaster parent)
  {
    super(sampleModel, dataBuffer, aRegion, sampleModelTranslate,
	  parent);
  }

  public WritableRaster getWritableParent()
  {
    return (WritableRaster) getParent();
  }
  
  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);
  }

  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
    
    // FIXME: Throw RasterFormatException if child bounds extends
    // beyond the bounds of this raster.
    
    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 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);
  }

  public void setRect(Raster srcRaster)
  {
    setRect(0, 0, 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);
  }

  public void setPixel(int x, int y, int[] iArray)
  {
    sampleModel.setPixel(x-sampleModelTranslateX,
			 y-sampleModelTranslateY,
			 iArray, dataBuffer);
  }

  public void setPixel(int x, int y, float[] fArray)
  {
    sampleModel.setPixel(x-sampleModelTranslateX,
			 y-sampleModelTranslateY,
			 fArray, dataBuffer);
  }

  public void setPixel(int x, int y, double[] dArray)
  {
    sampleModel.setPixel(x-sampleModelTranslateX,
			 y-sampleModelTranslateY,
			 dArray, dataBuffer);
  }

  public void setPixels(int x, int y, int w, int h, int[] iArray)
  {
    sampleModel.setPixels(x-sampleModelTranslateX,
			  y-sampleModelTranslateY,
			  w, h, iArray, dataBuffer);
  }

  public void setPixels(int x, int y, int w, int h, float[] fArray)
  {
    sampleModel.setPixels(x-sampleModelTranslateX,
			  y-sampleModelTranslateY,
			  w, h, fArray, dataBuffer);
  }

  public void setPixels(int x, int y, int w, int h, double[] dArray)
  {
    sampleModel.setPixels(x-sampleModelTranslateX,
			  y-sampleModelTranslateY,
			  w, h, dArray, dataBuffer);
  }

  public void setSample(int x, int y, int b, int s)
  {
    sampleModel.setSample(x-sampleModelTranslateX,
			  y-sampleModelTranslateY,
			  b, s, dataBuffer);
  }

  public void setSample(int x, int y, int b, float s)
  {
    sampleModel.setSample(x-sampleModelTranslateX,
			  y-sampleModelTranslateY,
			  b, s, dataBuffer);
  }

  public void setSample(int x, int y, int b, double s)
  {
    sampleModel.setSample(x-sampleModelTranslateX,
			  y-sampleModelTranslateY,
			  b, s, dataBuffer);
  }

  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);
  }

  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);
  }

  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);
  }
}