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/* AreaAveragingScaleFilter.java -- Java class for filtering images
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the non-peer AWT libraries of GNU Classpath.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation, either version 2 of the License, or
(at your option) any later verion.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; if not, write to the Free Software Foundation
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA. */
package java.awt.image;
/**
* This filter should produce images which do not have image artifacts
* like broken lines which were originally unbroken. The cost is of
* course speed. Using bi-linear interpolation here against 4 pixel
* points should give the desired results although Sun does not
* specify what the exact algorithm should be.
* <br>
* Currently this filter does nothing and needs to be implemented.
*
* @author C. Brian Jones (cbj@gnu.org)
*/
public class AreaAveragingScaleFilter extends ReplicateScaleFilter
{
/**
* Construct an instance of <code>AreaAveragingScaleFilter</code> which
* should be used in conjunction with a <code>FilteredImageSource</code>
* object.
*
* @param width the width of the destination image
* @param height the height of the destination image
*/
public AreaAveragingScaleFilter(int width, int height) {
super(width, height);
}
/**
* The <code>ImageProducer</code> should call this method with a
* bit mask of hints from any of <code>RANDOMPIXELORDER</code>,
* <code>TOPDOWNLEFTRIGHT</code>, <code>COMPLETESCANLINES</code>,
* <code>SINGLEPASS</code>, <code>SINGLEFRAME</code> from the
* <code>ImageConsumer</code> interface.
* <br>
* FIXME - more than likely Sun's implementation desires
* <code>TOPDOWNLEFTRIGHT</code> order and this method is overloaded here
* in order to assure that mask is part of the hints added to
* the consumer.
*
* @param flags a bit mask of hints
* @see ImageConsumer
*/
public void setHints(int flags)
{
consumer.setHints(flags);
}
/**
* This function delivers a rectangle of pixels where any
* pixel(m,n) is stored in the array as a <code>byte</code> at
* index (n * scansize + m + offset).
*
* @param x the x coordinate of the rectangle
* @param y the y coordinate of the rectangle
* @param w the width of the rectangle
* @param h the height of the rectangle
* @param model the <code>ColorModel</code> used to translate the pixels
* @param pixels the array of pixel values
* @param offset the index of the first pixels in the <code>pixels</code> array
* @param scansize the width to use in extracting pixels from the <code>pixels</code> array
*/
public void setPixels(int x, int y, int w, int h,
ColorModel model, byte[] pixels, int offset, int scansize)
{
consumer.setPixels(x, y, w, h, model, pixels, offset, scansize);
}
/**
* This function delivers a rectangle of pixels where any
* pixel(m,n) is stored in the array as an <code>int</code> at
* index (n * scansize + m + offset).
*
* @param x the x coordinate of the rectangle
* @param y the y coordinate of the rectangle
* @param w the width of the rectangle
* @param h the height of the rectangle
* @param model the <code>ColorModel</code> used to translate the pixels
* @param pixels the array of pixel values
* @param offset the index of the first pixels in the <code>pixels</code> array
* @param scansize the width to use in extracting pixels from the <code>pixels</code> array
*/
public void setPixels(int x, int y, int w, int h,
ColorModel model, int[] pixels, int offset, int scansize)
{
consumer.setPixels(x, y, w, h, model, pixels, offset, scansize);
}
}
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