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jeremybenn |
/* QtImageConsumer.java --
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Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt.peer.qt;
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import java.awt.image.ColorModel;
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import java.awt.image.ImageConsumer;
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import java.awt.image.ImageProducer;
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import java.util.Hashtable;
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/**
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* Helper class to QtImage. Sits and gathers pixels for a QtImage and then
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* calls QtImage.setImage().
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*
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* @author Sven de Marothy
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*/
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public class QtImageConsumer implements ImageConsumer
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{
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private QtImage target;
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private int width, height;
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private Hashtable properties;
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private int[] pixelCache = null;
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private ImageProducer source;
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public QtImageConsumer(QtImage target, ImageProducer source)
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{
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this.target = target;
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this.source = source;
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}
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public synchronized void imageComplete (int status)
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{
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source.removeConsumer(this);
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target.setImage(width, height, pixelCache, properties);
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}
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public synchronized void setColorModel (ColorModel model)
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{
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// This method is to inform on what the most used color model
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// in the image is, for optimization reasons. We ignore this
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// information.
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}
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public synchronized void setDimensions (int width, int height)
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{
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pixelCache = new int[width*height];
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this.width = width;
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this.height = height;
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}
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public synchronized void setHints (int flags)
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{
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// This method informs us in which order the pixels are
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// delivered, for progressive-loading support, etc.
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// Since we wait until it's all loaded, we can ignore the hints.
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}
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public synchronized void setPixels (int x, int y, int width, int height,
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ColorModel cm, byte[] pixels,
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int offset, int scansize)
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{
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setPixels (x, y, width, height, cm, convertPixels (pixels), offset,
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scansize);
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}
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public synchronized void setPixels (int x, int y, int width, int height,
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ColorModel cm, int[] pixels,
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int offset, int scansize)
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{
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if (pixelCache == null)
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return; // Not sure this should ever happen.
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if (cm.equals(QtImage.nativeModel))
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for (int i = 0; i < height; i++)
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System.arraycopy (pixels, offset + (i * scansize),
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pixelCache, (y + i) * this.width + x,
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width);
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else
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{
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for (int i = 0; i < height; i++)
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for (int j = 0; j < width; j++)
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{
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// get in AARRGGBB and convert to AABBGGRR
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int pix = cm.getRGB(pixels[offset + (i * scansize) + x + j]);
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byte b = (byte)(pix & 0xFF);
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byte r = (byte)(((pix & 0x00FF0000) >> 16) & 0xFF);
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pix &= 0xFF00FF00;
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pix |= ((b & 0xFF) << 16);
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pix |= (r & 0xFF);
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pixelCache[(y + i) * this.width + x + j] = pix;
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}
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}
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}
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/**
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* This is an old method, no idea if it's correct.
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*/
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private int[] convertPixels (byte[] pixels)
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{
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int ret[] = new int[pixels.length];
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for (int i = 0; i < pixels.length; i++)
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ret[i] = pixels[i] & 0xFF;
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return ret;
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}
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public synchronized void setProperties (Hashtable props)
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{
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this.properties = props;
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}
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}
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