gomp-20050608-branch/libjava/classpath/gnu/java/awt/peer/qt/QtImageConsumer.java

   1 /* QtImageConsumer.java --
   2    Copyright (C)  2005  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package gnu.java.awt.peer.qt;
  39
  40 import java.awt.Graphics;
  41 import java.awt.Image;
  42 import java.awt.image.ColorModel;
  43 import java.awt.image.DirectColorModel;
  44 import java.awt.image.ImageConsumer;
  45 import java.awt.image.ImageObserver;
  46 import java.awt.image.ImageProducer;
  47 import java.util.Hashtable;
  48 import java.util.Vector;
  49
  50 /**
  51  * Helper class to QtImage. Sits and gathers pixels for a QtImage and then
  52  * calls QtImage.setImage().
  53  *
  54  * @author Sven de Marothy
  55  */
  56 public class QtImageConsumer implements ImageConsumer
  57 {
  58   private QtImage target;
  59   private int width, height;
  60   private Hashtable properties;
  61   private int[] pixelCache = null;
  62   private ImageProducer source;
  63
  64   public QtImageConsumer(QtImage target, ImageProducer source)
  65   {
  66     this.target = target;
  67     this.source = source;
  68   }
  69
  70   public synchronized void imageComplete (int status)
  71   {
  72     source.removeConsumer(this);
  73     target.setImage(width, height, pixelCache, properties);
  74   }
  75
  76   public synchronized void setColorModel (ColorModel model)
  77   {
  78     // This method is to inform on what the most used color model
  79     // in the image is, for optimization reasons. We ignore this
  80     // information.
  81   }
  82
  83   public synchronized void setDimensions (int width, int height)
  84   {
  85     pixelCache = new int[width*height];
  86
  87     this.width = width;
  88     this.height = height;
  89   }
  90
  91   public synchronized void setHints (int flags)
  92   {
  93     // This method informs us in which order the pixels are
  94     // delivered, for progressive-loading support, etc.
  95     // Since we wait until it's all loaded, we can ignore the hints.
  96   }
  97
  98   public synchronized void setPixels (int x, int y, int width, int height,
  99                                       ColorModel cm, byte[] pixels,
 100                                       int offset, int scansize)
 101   {
 102     setPixels (x, y, width, height, cm, convertPixels (pixels), offset,
 103                scansize);
 104   }
 105
 106   public synchronized void setPixels (int x, int y, int width, int height,
 107                                       ColorModel cm, int[] pixels,
 108                                       int offset, int scansize)
 109   {
 110     if (pixelCache == null)
 111       return; // Not sure this should ever happen.
 112
 113     if (cm.equals(QtImage.nativeModel))
 114       for (int i = 0; i < height; i++)
 115         System.arraycopy (pixels, offset + (i * scansize),
 116                           pixelCache, (y + i) * this.width + x,
 117                           width);
 118     else
 119       {
 120         for (int i = 0; i < height; i++)
 121           for (int j = 0; j < width; j++)
 122             {
 123               // get in AARRGGBB and convert to AABBGGRR
 124               int pix = cm.getRGB(pixels[offset + (i * scansize) + x + j]);
 125               byte b = (byte)(pix & 0xFF);
 126               byte r = (byte)(((pix & 0x00FF0000) >> 16) & 0xFF);
 127               pix &= 0xFF00FF00;
 128               pix |= ((b & 0xFF) << 16);
 129               pix |= (r & 0xFF);
 130               pixelCache[(y + i) * this.width + x + j] = pix;
 131             }
 132       }
 133   }
 134
 135   /**
 136    * This is an old method, no idea if it's correct.
 137    */
 138   private int[] convertPixels (byte[] pixels)
 139   {
 140     int ret[] = new int[pixels.length];
 141
 142     for (int i = 0; i < pixels.length; i++)
 143       ret[i] = pixels[i] & 0xFF;
 144
 145     return ret;
 146   }
 147
 148   public synchronized void setProperties (Hashtable props)
 149   {
 150     this.properties = props;
 151   }
 152 }
 153
 154