1 files changed, 494 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java b/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java
new file mode 100644
index 00000000000..abb4137f4ae
--- /dev/null
+++ b/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java
@@ -0,0 +1,494 @@
+/* GtkImage.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.gtk;
+
+import java.awt.Graphics;
+import java.awt.Color;
+import java.awt.Image;
+import java.awt.image.ColorModel;
+import java.awt.image.DirectColorModel;
+import java.awt.image.MemoryImageSource;
+import java.awt.image.ImageConsumer;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+import java.io.File;
+import java.io.IOException;
+import java.util.Hashtable;
+import java.util.Vector;
+import gnu.classpath.RawData;
+
+/**
+ * GtkImage - wraps a GdkPixbuf or GdkPixmap.
+ *
+ * The constructor GtkImage(int, int) creates an 'off-screen' GdkPixmap,
+ * this can be drawn to (it's a GdkDrawable), and correspondingly, you can
+ * create a GdkGraphics object for it. 
+ *
+ * This corresponds to the Image implementation returned by 
+ * Component.createImage(int, int). 
+ *
+ * A GdkPixbuf is 'on-screen' and the gdk cannot draw to it,
+ * this is used for the other constructors (and other createImage methods), and
+ * corresponds to the Image implementations returned by the Toolkit.createImage
+ * methods, and is basically immutable. 
+ *
+ * @author Sven de Marothy
+ */
+public class GtkImage extends Image
+{
+  int width = -1, height = -1;
+
+  /**
+   * Properties.
+   */
+  Hashtable props;
+
+  /**
+   * Loaded or not flag, for asynchronous compatibility.
+   */
+  boolean isLoaded;
+
+  /**
+   * Pointer to the GdkPixbuf
+   */
+  RawData pixmap;
+
+  /**
+   * Observer queue.
+   */
+  Vector observers;
+
+  /**
+   * If offScreen is set, a GdkBitmap is wrapped and not a Pixbuf.
+   */
+  boolean offScreen;
+
+  /**
+   * Error flag for loading.
+   */
+  boolean errorLoading;
+
+  /**
+   * Original source, if created from an ImageProducer.
+   */
+  ImageProducer source;
+
+  /*
+   * The 32-bit AABBGGRR format the GDK uses.
+   */
+  static ColorModel nativeModel = new DirectColorModel(32, 
+						       0x000000FF,
+						       0x0000FF00,
+						       0x00FF0000,
+						       0xFF000000);
+
+  /**
+   * Returns a copy of the pixel data as a java array.
+   */
+  private native int[] getPixels();
+
+  /**
+   * Sets the pixel data from a java array.
+   */
+  private native void setPixels(int[] pixels);
+
+  /**
+   * Loads an image using gdk-pixbuf.
+   */
+  private native boolean loadPixbuf(String name);
+
+  /**
+   * Allocates a Gtk Pixbuf or pixmap
+   */
+  private native void createPixmap();
+
+  /**
+   * Frees the above.
+   */
+  private native void freePixmap();
+
+  /**
+   * Sets the pixmap to scaled copy of src image. hints are rendering hints.
+   */
+  private native void createScaledPixmap(GtkImage src, int hints);
+
+  /**
+   * Draws the image, optionally scaled and composited.
+   */
+  private native void drawPixelsScaled (GdkGraphics gc, 
+					int bg_red, int bg_green, int bg_blue, 
+					int x, int y, int width, int height, 
+					boolean composite);
+
+  /**
+   * Draws the image, optionally scaled flipped and composited.
+   */
+  private native void drawPixelsScaledFlipped (GdkGraphics gc, 
+					       int bg_red, int bg_green, 
+					       int bg_blue, 
+					       boolean flipX, boolean flipY,
+					       int srcX, int srcY,
+					       int srcWidth, int srcHeight,
+					       int dstX, int dstY,
+					       int dstWidth, int dstHeight,
+					       boolean composite);
+
+  /**
+   * Constructs a GtkImage from an ImageProducer. Asynchronity is handled in
+   * the following manner: 
+   * A GtkImageConsumer gets the image data, and calls setImage() when 
+   * completely finished. The GtkImage is not considered loaded until the
+   * GtkImageConsumer is completely finished. We go for all "all or nothing".
+   */
+  public GtkImage (ImageProducer producer)
+  {
+    isLoaded = false;
+    observers = new Vector();
+    source = producer;
+    errorLoading = false;
+    source.startProduction(new GtkImageConsumer(this, source));
+    offScreen = false;
+  }
+
+  /**
+   * Constructs a GtkImage by loading a given file.
+   *
+   * @throws IllegalArgumentException if the image could not be loaded.
+   */
+  public GtkImage (String filename)
+  {
+    File f = new File(filename);
+    try
+      {
+	if (loadPixbuf(f.getCanonicalPath()) != true)
+	  throw new IllegalArgumentException("Couldn't load image: "+filename);
+      } 
+    catch(IOException e)
+      {
+	  throw new IllegalArgumentException("Couldn't load image: "+filename);
+      }
+
+    isLoaded = true;
+    observers = null;
+    offScreen = false;
+    props = new Hashtable();
+  }
+
+  /**
+   * Constructs an empty GtkImage.
+   */
+  public GtkImage (int width, int height)
+  {
+    this.width = width;
+    this.height = height;
+    props = new Hashtable();
+    isLoaded = true;
+    observers = null;
+    offScreen = true;
+    createPixmap();
+  }
+
+  /**
+   * Constructs a scaled version of the src bitmap, using the GDK.
+   */
+  private GtkImage (GtkImage src, int width, int height, int hints)
+  {
+    this.width = width;
+    this.height = height;
+    props = new Hashtable();
+    isLoaded = true;
+    observers = null;
+    offScreen = false;
+
+    // Use the GDK scaling method.
+    createScaledPixmap(src, hints);
+  }
+
+  /**
+   * Callback from the image consumer.
+   */
+  public void setImage(int width, int height, 
+		       int[] pixels, Hashtable properties)
+  {
+    this.width = width;
+    this.height = height;
+    props = (properties != null) ? properties : new Hashtable();
+
+    if (width <= 0 || height <= 0 || pixels == null)
+      {
+	errorLoading = true;
+	return;
+      }
+
+    isLoaded = true;
+    deliver();
+    createPixmap();
+    setPixels(pixels);
+  }
+
+  // java.awt.Image methods ////////////////////////////////////////////////
+
+  public synchronized int getWidth (ImageObserver observer)
+  {
+    if (addObserver(observer))
+      return -1;
+
+    return width;
+  }
+  
+  public synchronized int getHeight (ImageObserver observer)
+  {
+    if (addObserver(observer))
+      return -1;
+    
+    return height;
+  }
+
+  public synchronized Object getProperty (String name, ImageObserver observer)
+  {
+    if (addObserver(observer))
+      return UndefinedProperty;
+    
+    Object value = props.get (name);
+    return (value == null) ? UndefinedProperty : value;
+  }
+
+  /**
+   * Returns the source of this image.
+   */
+  public ImageProducer getSource ()
+  {
+    if (!isLoaded)
+      return null;
+    return new MemoryImageSource(width, height, nativeModel, getPixels(), 
+				 0, width);
+  }
+
+  /**
+   * Creates a GdkGraphics context for this pixmap.
+   */
+  public Graphics getGraphics ()
+  {
+    if (!isLoaded) 
+      return null;
+    if (offScreen)
+      return new GdkGraphics(this);
+    else
+      throw new IllegalAccessError("This method only works for off-screen"
+				   +" Images.");
+  }
+  
+  /**
+   * Returns a scaled instance of this pixmap.
+   */
+  public Image getScaledInstance(int width,
+				 int height,
+				 int hints)
+  {
+    if (width <= 0 || height <= 0)
+      throw new IllegalArgumentException("Width and height of scaled bitmap"+
+					 "must be >= 0");
+
+    return new GtkImage(this, width, height, hints);
+  }
+
+  /**
+   * If the image is loaded and comes from an ImageProducer, 
+   * regenerate the image from there.
+   *
+   * I have no idea if this is ever actually used. Since GtkImage can't be
+   * instantiated directly, how is the user to know if it was created from
+   * an ImageProducer or not?
+   */
+  public synchronized void flush ()
+  {
+    if (isLoaded && source != null)
+      {
+	observers = new Vector();
+	isLoaded = false;
+	freePixmap();
+	source.startProduction(new GtkImageConsumer(this, source));
+      }
+  }
+
+  public void finalize()
+  {
+    if (isLoaded)
+      freePixmap();
+  }
+
+  /**
+   * Returns the image status, used by GtkToolkit
+   */
+  public int checkImage (ImageObserver observer)
+  {
+    if (addObserver(observer))
+      {
+	if (errorLoading == true)
+	  return ImageObserver.ERROR;
+	else
+	  return 0;
+      }
+
+    return ImageObserver.ALLBITS | ImageObserver.WIDTH | ImageObserver.HEIGHT;
+  }
+
+  // Drawing methods ////////////////////////////////////////////////
+
+  /**
+   * Draws an image with eventual scaling/transforming.
+   */
+  public boolean drawImage (GdkGraphics g, int dx1, int dy1, int dx2, int dy2, 
+			    int sx1, int sy1, int sx2, int sy2, 
+			    Color bgcolor, ImageObserver observer)
+  {
+    if (addObserver(observer))
+      return false;
+
+    boolean flipX = (dx1 > dx2)^(sx1 > sx2);
+    boolean flipY = (dy1 > dy2)^(sy1 > sy2);
+    int dstWidth = Math.abs (dx2 - dx1);
+    int dstHeight = Math.abs (dy2 - dy1);
+    int srcWidth = Math.abs (sx2 - sx1);
+    int srcHeight = Math.abs (sy2 - sy1);
+    int srcX = (sx1 < sx2) ? sx1 : sx2;
+    int srcY = (sy1 < sy2) ? sy1 : sy2;
+    int dstX = (dx1 < dx2) ? dx1 : dx2;
+    int dstY = (dy1 < dy2) ? dy1 : dy2;
+
+    // Clipping. This requires the dst to be scaled as well, 
+    if (srcWidth > width)
+      {
+	dstWidth = (int)((double)dstWidth*((double)width/(double)srcWidth));
+	srcWidth = width - srcX;
+      }
+
+    if (srcHeight > height) 
+      {
+	dstHeight = (int)((double)dstHeight*((double)height/(double)srcHeight));
+	srcHeight = height - srcY;
+      }
+
+    if (srcWidth + srcX > width)
+      {
+	dstWidth = (int)((double)dstWidth * (double)(width - srcX)/(double)srcWidth);
+	srcWidth = width - srcX;
+      }
+
+    if (srcHeight + srcY > height)
+      {
+	dstHeight = (int)((double)dstHeight * (double)(width - srcY)/(double)srcHeight);
+	srcHeight = height - srcY;
+      }
+
+    if ( srcWidth <= 0 || srcHeight <= 0 || dstWidth <= 0 || dstHeight <= 0)
+      return true;
+
+    if(bgcolor != null)
+      drawPixelsScaledFlipped (g, bgcolor.getRed (), bgcolor.getGreen (), 
+			       bgcolor.getBlue (), 
+			       flipX, flipY,
+			       srcX, srcY,
+			       srcWidth, srcHeight,
+			       dstX,  dstY,
+			       dstWidth, dstHeight,
+			       true);
+    else
+      drawPixelsScaledFlipped (g, 0, 0, 0, flipX, flipY,
+			       srcX, srcY, srcWidth, srcHeight,
+			       dstX,  dstY, dstWidth, dstHeight,
+			       false);
+    return true;
+  }
+
+  /**
+   * Draws an image to the GdkGraphics context, at (x,y) scaled to 
+   * width and height, with optional compositing with a background color.
+   */
+  public boolean drawImage (GdkGraphics g, int x, int y, int width, int height,
+			    Color bgcolor, ImageObserver observer)
+  {
+    if (addObserver(observer))
+      return false;
+
+    if(bgcolor != null)
+      drawPixelsScaled(g, bgcolor.getRed (), bgcolor.getGreen (), 
+		       bgcolor.getBlue (), x, y, width, height, true);
+    else
+      drawPixelsScaled(g, 0, 0, 0, x, y, width, height, false);
+
+    return true;
+  }
+
+  // Private methods ////////////////////////////////////////////////
+
+  /**
+   * Delivers notifications to all queued observers.
+   */
+  private void deliver()
+  {
+    int flags = ImageObserver.HEIGHT | 
+      ImageObserver.WIDTH |
+      ImageObserver.PROPERTIES |
+      ImageObserver.ALLBITS;
+
+    if (observers != null)
+      for(int i=0; i < observers.size(); i++)
+	((ImageObserver)observers.elementAt(i)).
+	  imageUpdate(this, flags, 0, 0, width, height);
+
+    observers = null;
+  }
+  
+  /**
+   * Adds an observer, if we need to.
+   * @return true if an observer was added.
+   */
+  private boolean addObserver(ImageObserver observer)
+  {
+    if (!isLoaded)
+      {
+	if(observer != null)
+	  if (!observers.contains (observer))
+	    observers.addElement (observer);
+	return true;
+      }
+    return false;
+  }
+}