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Modules/multimedia/crop.java

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+/*
+crop.java
+ *
+ *    Copyright (c) 2000-2001, Ted Nelson and Tuomas Lukka
+ *
+ *    You may use and distribute under the terms of either the GNU Lesser
+ *    General Public License, either version 2 of the license or,
+ *    at your choice, any later version. Alternatively, you may use and
+ *    distribute under the terms of the XPL.
+ *
+ *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of
+ *    the licenses.
+ *
+ *    This software 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 README
+ *    file for more details.
+ *
+ */
+/*
+ *	Written by Tero Mäyränen
+ */
+
+package org.gzigzag.module.multimedia;
+import org.gzigzag.*;
+import java.awt.*;
+import java.awt.image.*;
+import java.util.*;
+
+/**
+ *	unfinished
+ */
+
+public class crop extends MediaZOb
+{
+	public static final String rcsid = "$Id: crop.java,v 1.2 2001/03/05 08:44:14 deetsay Exp $";
+
+	private Pixels pix = null;
+
+	private int oldframe=0, oldpw=0, oldph=0, oldpx=0, oldpy=0;
+
+	public Pixels getPixels()
+	{
+		Pixels inpix = readParam("input").getPixels();
+
+		int iw = inpix.getWidth();
+		int ih = inpix.getHeight();
+		int ix = inpix.getX();
+		int iy = inpix.getY();
+
+		int pw = readParam("width").getInt(iw);
+		int ph = readParam("height").getInt(ih);
+		int px = readParam("x").getInt(ix);
+		int py = readParam("y").getInt(iy);
+
+		if (pix != null && inpix.getFrame() == oldframe
+			&& pw == oldpw && ph == oldph && px == oldpx && py == oldpy)
+		{
+			return pix;
+		}
+		oldpw = pw; oldph = ph; oldpx = px; oldpy = py; oldframe = inpix.getFrame();
+
+		if (pix == null)
+		{
+			pix = new Pixels(pw, ph);
+		}
+		else
+		{
+			pix.setSize(pw, ph);
+		}
+		pix.setX(px);
+		pix.setY(py);
+
+		int p[] = pix.getPixels(), ip[] = inpix.getPixels();
+		int i = 0;
+		for (int y=py; y<py+ph; y++)
+		{
+			if ((y < iy) || (y >= iy + ih))
+			{
+				for (int x=0; x<pw; x++) p[i++] = 0xff000000;
+			}
+			else
+			{
+				for (int x=px; x<px+pw; x++)
+				{
+					if ((x < ix) || (x >= ix + iw)) p[i++] = 0xff000000;
+					else p[i++] = ip[ ((y-iy)*iw)+(x-ix) ];
+				}
+			}
+		}
+		pix.setFrame(pix.getFrame()+1);
+		return pix;
+	}
+}