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Viewing changes to src/jcsp-demos/raytrace/Harvester.java

  • Committer: Bazaar Package Importer
  • Author(s): Miguel Landaeta
  • Date: 2010-06-20 18:12:26 UTC
  • Revision ID: james.westby@ubuntu.com-20100620181226-8yg8d9rjjjiuy7oz
Tags: upstream-1.1-rc4
Import upstream version 1.1-rc4

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src/jcsp-demos/raytrace/Harvester.java
 
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    //////////////////////////////////////////////////////////////////////
 
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    //                                                                  //
 
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    //  JCSP ("CSP for Java") Libraries                                 //
 
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    //  Copyright (C) 1996-2008 Peter Welch and Paul Austin.            //
 
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    //                2001-2004 Quickstone Technologies Limited.        //
 
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    //                                                                  //
 
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    //  This library is free software; you can redistribute it and/or   //
 
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    //  modify it under the terms of the GNU Lesser General Public      //
 
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    //  License as published by the Free Software Foundation; either    //
 
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    //  version 2.1 of the License, or (at your option) any later       //
 
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    //  version.                                                        //
 
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    //                                                                  //
 
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    //  This library is distributed in the hope that it will be         //
 
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    //  useful, but WITHOUT ANY WARRANTY; without even the implied      //
 
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    //  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR         //
 
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    //  PURPOSE. See the GNU Lesser General Public License for more     //
 
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    //  details.                                                        //
 
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    //                                                                  //
 
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    //  You should have received a copy of the GNU Lesser General       //
 
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    //  Public License along with this library; if not, write to the    //
 
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    //  Free Software Foundation, Inc., 59 Temple Place, Suite 330,     //
 
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    //  Boston, MA 02111-1307, USA.                                     //
 
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    //                                                                  //
 
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    //  Author contact: P.H.Welch@kent.ac.uk                             //
 
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    //                                                                  //
 
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    //                                                                  //
 
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    //////////////////////////////////////////////////////////////////////
 
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import org.jcsp.lang.*;
 
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import org.jcsp.awt.*;
 
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import java.awt.*;
 
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import java.awt.image.*;
 
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/**
 
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 * @author Quickstone Technologies Limited
 
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 */
 
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class Harvester implements CSProcess {
 
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        private final ChannelInput[] fromWorkers;
 
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        private final ChannelInput fromFarmer;
 
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        private final ChannelOutput toGraphics;
 
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        private final ChannelInput fromGraphics;
 
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        public Harvester (ChannelInput[] fromWorkers, ChannelInput fromFarmer,
 
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                            ChannelOutput toGraphics, ChannelInput fromGraphics) {
 
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                this.fromWorkers = fromWorkers;
 
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                this.fromFarmer = fromFarmer;
 
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                this.toGraphics = toGraphics;
 
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                this.fromGraphics = fromGraphics;
 
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        }
 
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        public void run () {
 
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                System.out.println ("Harvester: started");
 
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                final Counter counter = new Counter ();
 
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                final DisplayList displayList = new DisplayList ();
 
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                int currentFrame = 0;
 
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                int width = 0, height = 0;
 
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                int[] pixels = null;
 
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                MemoryImageSource mis = null;
 
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                Image image = null;
 
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                int numWorkers = 0, nextNumWorkers = 0, nextNumWorkersFrame = 0;
 
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            toGraphics.write (new GraphicsProtocol.SetPaintable (displayList));
 
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            fromGraphics.read ();
 
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                while (true) {
 
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                        // Synchronize with farmer
 
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                        //System.out.println ("Harvester: synchronize with farmer");
 
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                        ImagePacket ip = (ImagePacket)fromFarmer.read ();
 
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                        if (ip != null) {
 
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                                System.out.println ("Harvester: updating image configuration");
 
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                                width = ip.width;
 
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                                height = ip.height;
 
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                                pixels = new int[width * height];
 
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                                mis = new MemoryImageSource (width, height, pixels, 0, width);
 
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                                mis.setAnimated (true);
 
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                                toGraphics.write (new GraphicsProtocol.MakeMISImage (mis));
 
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                                image = (Image)fromGraphics.read ();
 
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                                displayList.set (new GraphicsCommand.DrawImage (image, 0, 0, width, height));
 
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                                if (ip.numWorkers != numWorkers) {
 
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                                        nextNumWorkers = ip.numWorkers;
 
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                                        nextNumWorkersFrame = ip.frame;
 
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                                }
 
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                        }
 
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                        // Read in the work packets for the current frame
 
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                        if (nextNumWorkersFrame == currentFrame) {
 
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                                numWorkers = nextNumWorkers;
 
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                        }
 
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                        int i = 0;
 
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                        try {
 
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                                //System.out.println ("Harvester: read frame " + currentFrame + " results");
 
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                        for (; i < numWorkers; i++) {
 
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                                ResultPacket rp = (ResultPacket)fromWorkers[currentFrame % fromWorkers.length].read ();
 
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                                rp.expand ();
 
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                                int j = rp.offset * width, x = 0;
 
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                                for (int kR = 0, kG = rp.color.length / 3, kB = (kG << 1); kB < rp.color.length; ) {
 
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                                        int a = (rp.color[kR++] << 16) & 0xFF0000;
 
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                                        a |= (rp.color[kG++] << 8) & 0xFF00;
 
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                                        pixels[j++] = 0xFF000000 | a | (rp.color[kB++] & 0xFF);
 
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                                        if (++x >= width) {
 
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                                                j += (rp.step - 1) * width;
 
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                                                x = 0;
 
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                                        }
 
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                                }
 
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                                rp.discard ();
 
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                        }
 
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                        mis.newPixels ();
 
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                        } catch (ArrayIndexOutOfBoundsException e) {
 
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                                System.out.println ("Harvester: array index problems");
 
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                                // Image has probably changed size. I don't care for elegance so just skip any outstanding packets
 
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                                i++;
 
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                                for (; i < numWorkers; i++) {
 
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                                fromWorkers[currentFrame % fromWorkers.length].read ();
 
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                                }
 
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                        }
 
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                        currentFrame++;
 
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                        counter.click ();
 
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                }
 
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        }
 
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}