llvm-gcc-4.2/libjava/classpath/java/awt/image/BufferedImageFilter.java

/* Copyright (C) 2004  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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02110-1301 USA.

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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;

/**
 * The BufferedImageFilter class wraps BufferedImageOp objects in a Filter.
 * 
 * When pixels are pushed through the filter, we create a BufferedImage,
 * apply the BufferedImageOp, and pass the filtered pixels to the base class.
 * 
 * @author jlquinn@optonline.net
 */
public class BufferedImageFilter extends ImageFilter implements Cloneable
{
  private BufferedImageOp op;

  /**
   * 
   */
  public BufferedImageFilter(BufferedImageOp op)
  {
    super();
    if (op == null)
      throw new NullPointerException("BufferedImageFilter null"
				     + " op in constructor");
    this.op = op;
  }
  
  /**
   * @return Returns the contained BufferedImageOp.
   */
  public BufferedImageOp getBufferedImageOp()
  {
    return op;
  }

  // FIXME: Definitely not sure this is the right thing.  I'm not sure how to
  // create a compatible sample model that incorporates scansize != w.  I
  // asume off is handled by the db itself.
  public void setPixels(int x, int y, int w, int h, ColorModel model,
			byte[] pixels, int off, int scansize)
  {
    // Create an input BufferedImage
    DataBufferByte db = new DataBufferByte(pixels, scansize * h + off, off);
    SampleModel sm = model.createCompatibleSampleModel(scansize, h);
    WritableRaster wr = new WritableRaster(sm, db, new Point(0, 0));
    BufferedImage in =
      new BufferedImage(model, wr, model.isAlphaPremultiplied(), null);
    BufferedImage out = op.createCompatibleDestImage(in, model);
    op.filter(in, out);
    DataBuffer dbout = out.getRaster().getDataBuffer(); 
    super.setPixels(0, 0, w, h, model, ((DataBufferByte)dbout).getData(), 0,
		    scansize);
  }

  // FIXME: Definitely not sure this is the right thing.  I'm not sure how
  // to create a compatible sample model that incorporates
  // scansize != w.  I asume off is handled by the db itself.
  public void setPixels(int x, int y, int w, int h, ColorModel model,
			int[] pixels, int off, int scansize)
  {
    // Create an input BufferedImage
    DataBufferInt db = new DataBufferInt(pixels, scansize * h + off, off);
    SampleModel sm = model.createCompatibleSampleModel(scansize, h);
    WritableRaster wr = new WritableRaster(sm, db, new Point(0, 0));
    BufferedImage in =
      new BufferedImage(model, wr, model.isAlphaPremultiplied(), null);
    BufferedImage out = op.createCompatibleDestImage(in, model);
    op.filter(in, out);
    DataBuffer dbout = out.getRaster().getDataBuffer(); 
    super.setPixels(0, 0, w, h, model, ((DataBufferInt)dbout).getData(), 0,
		    scansize);
  }
}