/* BufferFilter - non-solar version.  

 *

 * Buffers all data before sending it to next filter. 

 * If you want to, you can invoke this filter from another filter. See

 * technique used in CircleWaveFilter.

 *

 * Written by Marcus Hoverby.  Copyright (c) 1997 Marcus Hoverby.

 * You may modify and distribute this example for non-commercial

 * purposes. This code is provided without warranty.

 */







import java.awt.image.*;









/** 

 * The ImageFilter BufferFilter buffers the image data sent here and delivers

 * the image in one piece. If you want to, you can invoke this filter from 

 * another filter. See technique used in CircleWaveFilter.

 * @author Marcus Hoverby

 * @version v1.0

 * @see java.awt.image.ImageFilter

 */





public class BufferFilter extends ImageFilter {



  private int  width;

  private int  height;

  private ColorModel colormodel;

  private boolean isint;

  private int[]   intbuffer=null;

  private byte[]  bytebuffer=null;









  /**

   * Constructor

   */

  public BufferFilter() { }







  /** 

   * setPixels for images in direct format.

   */

  public void setPixels(int x, int y, int w, int h, ColorModel cm, 

                        int[] pix, int offset, int scansize) {

	//allready buffered?

    if ((x==0) && (h==height) && (offset==0) && (scansize==w)) intbuffer = pix;

    else if (intbuffer==null) intbuffer = new int[width*height];



    for (int cy=0; cy < h; cy++) {

      for (int cx=0; cx < w; cx++) {

        intbuffer[(cy+y)*width + cx] = pix[cy*scansize + cx + offset];

      }

    }

    colormodel = cm;

    isint = true;

  }







  /** 

   * setPixels for images in indexed format.

   */

  public void setPixels(int x, int y, int w, int h, ColorModel cm, 

                        byte[] pix, int offset, int scansize) {

	//allready buffered?

    if ((x==0) && (h==height) && (offset==0) && (scansize==w)) bytebuffer = pix;

    else if (bytebuffer==null) bytebuffer = new byte[width*height];



    for (int cy=0; cy < h; cy++) {

      for (int cx=0; cx < w; cx++) {

        bytebuffer[(cy+y)*width + cx] = pix[cy*scansize + cx + offset];

      }

    }

    colormodel = cm;

    isint = false;

  }







  /**

   * The image is complete and is ready to be sent to next filter.

   */

  public void imageComplete(int status) {

    if (isint && (intbuffer != null))

      consumer.setPixels(0, 0, width, height, colormodel, intbuffer, 0, width);

    else if (bytebuffer != null) consumer.setPixels(0, 0, width, height, colormodel, bytebuffer, 0, width);

    consumer.imageComplete(status);

    intbuffer = null;

    bytebuffer = null;

  }







  /** 

   * setDimensions in invoked by the ImageProducer and tells us how large

   * the image is. 

   */

  public void setDimensions(int w, int h) {

    intbuffer = null;

    bytebuffer = null;

    width = w;

    height = h;

    consumer.setDimensions(w, h);

  }







}





/*################# End of class CircleWaveFilter #################*/