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/* QtImageConsumer.java --

   Copyright (C)  2005, 2006  Free Software Foundation, Inc.

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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General Public License for more details.

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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

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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

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package gnu.java.awt.peer.qt;

import java.awt.image.ColorModel;

import java.awt.image.ImageConsumer;

import java.awt.image.ImageProducer;

import java.util.Hashtable;

/**

 * Helper class to QtImage. Sits and gathers pixels for a QtImage and then

 * calls QtImage.setImage().

 *

 * @author Sven de Marothy

 */

public class QtImageConsumer implements ImageConsumer

{

  private QtImage target;

  private int width, height;

  private Hashtable properties;

  private int[] pixelCache = null;

  private ImageProducer source;

  public QtImageConsumer(QtImage target, ImageProducer source)

  {

    this.target = target;

    this.source = source;

  }

  public synchronized void imageComplete (int status)

  {

    source.removeConsumer(this);

    target.setImage(width, height, pixelCache, properties);

  }

  public synchronized void setColorModel (ColorModel model)

  {

    // This method is to inform on what the most used color model

    // in the image is, for optimization reasons. We ignore this

    // information.

  }

  public synchronized void setDimensions (int width, int height)

  {

    pixelCache = new int[width*height];

    this.width = width;

    this.height = height;

  }

  public synchronized void setHints (int flags)

  {

    // This method informs us in which order the pixels are

    // delivered, for progressive-loading support, etc.

    // Since we wait until it's all loaded, we can ignore the hints.

  }

  public synchronized void setPixels (int x, int y, int width, int height,

                                      ColorModel cm, byte[] pixels,

                                      int offset, int scansize)

  {

    setPixels (x, y, width, height, cm, convertPixels (pixels), offset,

               scansize);

  }

  public synchronized void setPixels (int x, int y, int width, int height,

                                      ColorModel cm, int[] pixels,

                                      int offset, int scansize)

  {

    if (pixelCache == null)

      return; // Not sure this should ever happen.

    if (cm.equals(QtImage.nativeModel))

      for (int i = 0; i < height; i++)

        System.arraycopy (pixels, offset + (i * scansize),

                          pixelCache, (y + i) * this.width + x,

                          width);

    else

      {

        for (int i = 0; i < height; i++)

          for (int j = 0; j < width; j++)

            {

              // get in AARRGGBB and convert to AABBGGRR

              int pix = cm.getRGB(pixels[offset + (i * scansize) + x + j]);

              byte b = (byte)(pix & 0xFF);

              byte r = (byte)(((pix & 0x00FF0000) >> 16) & 0xFF);

              pix &= 0xFF00FF00;

              pix |= ((b & 0xFF) << 16);

              pix |= (r & 0xFF);

              pixelCache[(y + i) * this.width + x + j] = pix;

            }

      }

  }

  /**

   * This is an old method, no idea if it's correct.

   */

  private int[] convertPixels (byte[] pixels)

  {

    int ret[] = new int[pixels.length];

    for (int i = 0; i < pixels.length; i++)

      ret[i] = pixels[i] & 0xFF;

    return ret;

  }

  public synchronized void setProperties (Hashtable props)

  {

    this.properties = props;

  }

}