Initial revision

From-SVN: r104578

libjava/classpath/gnu/java/awt/peer/qt/QtImageConsumer.java

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+/* QtImageConsumer.java --
+   Copyright (C)  2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.java.awt.peer.qt;
+
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.image.ColorModel;
+import java.awt.image.DirectColorModel;
+import java.awt.image.ImageConsumer;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+import java.util.Hashtable;
+import java.util.Vector;
+
+/**
+ * Helper class to QtImage. Sits and gathers pixels for a QtImage and then
+ * calls QtImage.setImage().
+ *
+ * @author Sven de Marothy
+ */
+public class QtImageConsumer implements ImageConsumer
+{
+  private QtImage target;
+  private int width, height;
+  private Hashtable properties;
+  private int[] pixelCache = null;
+  private ImageProducer source;
+
+  public QtImageConsumer(QtImage target, ImageProducer source)
+  {
+    this.target = target;
+    this.source = source;
+  }
+
+  public synchronized void imageComplete (int status)
+  {
+    source.removeConsumer(this);
+    target.setImage(width, height, pixelCache, properties);
+  }
+
+  public synchronized void setColorModel (ColorModel model)
+  {
+    // This method is to inform on what the most used color model
+    // in the image is, for optimization reasons. We ignore this
+    // information.
+  }
+
+  public synchronized void setDimensions (int width, int height)
+  {
+    pixelCache = new int[width*height];
+
+    this.width = width;
+    this.height = height;
+  }
+
+  public synchronized void setHints (int flags)
+  {
+    // This method informs us in which order the pixels are
+    // delivered, for progressive-loading support, etc. 
+    // Since we wait until it's all loaded, we can ignore the hints.
+  }
+
+  public synchronized void setPixels (int x, int y, int width, int height, 
+				      ColorModel cm, byte[] pixels,
+				      int offset, int scansize)
+  {
+    setPixels (x, y, width, height, cm, convertPixels (pixels), offset,
+               scansize);
+  }
+
+  public synchronized void setPixels (int x, int y, int width, int height, 
+				      ColorModel cm, int[] pixels,
+				      int offset, int scansize)
+  {
+    if (pixelCache == null)
+      return; // Not sure this should ever happen.
+
+    if (cm.equals(QtImage.nativeModel))
+      for (int i = 0; i < height; i++)
+	System.arraycopy (pixels, offset + (i * scansize),
+			  pixelCache, (y + i) * this.width + x,
+			  width);
+    else
+      {
+	for (int i = 0; i < height; i++)
+	  for (int j = 0; j < width; j++)
+	    {
+	      // get in AARRGGBB and convert to AABBGGRR
+	      int pix = cm.getRGB(pixels[offset + (i * scansize) + x + j]);
+	      byte b = (byte)(pix & 0xFF);
+	      byte r = (byte)(((pix & 0x00FF0000) >> 16) & 0xFF);
+	      pix &= 0xFF00FF00;
+	      pix |= ((b & 0xFF) << 16);
+	      pix |= (r & 0xFF);
+	      pixelCache[(y + i) * this.width + x + j] = pix;
+	    }
+      }
+  }
+
+  /**
+   * This is an old method, no idea if it's correct.
+   */
+  private int[] convertPixels (byte[] pixels)
+  {
+    int ret[] = new int[pixels.length];
+
+    for (int i = 0; i < pixels.length; i++)
+      ret[i] = pixels[i] & 0xFF;
+    
+    return ret;
+  }
+
+  public synchronized void setProperties (Hashtable props)
+  {
+    this.properties = props;
+  }
+}
+
+