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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java | 541 |
1 files changed, 541 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java new file mode 100644 index 000000000..719669eae --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/gtk/GtkImage.java @@ -0,0 +1,541 @@ +/* GtkImage.java + Copyright (C) 2005, 2006 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.Image; +import java.awt.image.ColorModel; +import java.awt.image.DirectColorModel; +import java.awt.image.MemoryImageSource; +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 java.io.ByteArrayOutputStream; +import java.io.BufferedInputStream; +import java.net.URL; +import gnu.classpath.Pointer; + +/** + * GtkImage - wraps a GdkPixbuf. + * + * 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 - + * don't change the name without changing the native code. + */ + Pointer pixbuf; + + /** + * Observer queue. + */ + Vector<ImageObserver> observers; + + /** + * 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); + + /** + * The singleton GtkImage that is returned on errors by GtkToolkit. + */ + private static GtkImage errorImage; + + /** + * Lock that should be held for all gdkpixbuf operations. We don't use + * the global gdk_threads_enter/leave functions in most places since + * most gdkpixbuf operations can be done in parallel to drawing and + * manipulating gtk widgets. + */ + static Object pixbufLock = new Object(); + + /** + * Allocate a PixBuf from a given ARGB32 buffer pointer. + */ + private native void initFromBuffer( long bufferPointer ); + + /** + * Returns a copy of the pixel data as a java array. + * Should be called with the pixbufLock held. + */ + native int[] getPixels(); + + /** + * Sets the pixel data from a java array. + * Should be called with the pixbufLock held. + */ + private native void setPixels(int[] pixels); + + /** + * Loads an image using gdk-pixbuf from a file. + * Should be called with the pixbufLock held. + */ + private native boolean loadPixbuf(String name); + + /** + * Loads an image using gdk-pixbuf from data. + * Should be called with the pixbufLock held. + */ + private native boolean loadImageFromData(byte[] data); + + /** + * Allocates a Gtk Pixbuf + * Should be called with the pixbufLock held. + */ + private native void createPixbuf(); + + /** + * Frees the above. + * Should be called with the pixbufLock held. + */ + private native void freePixbuf(); + + /** + * Sets the pixbuf to scaled copy of src image. hints are rendering hints. + * Should be called with the pixbufLock held. + */ + private native void createScaledPixbuf(GtkImage src, int hints); + + /** + * 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<ImageObserver>(); + source = producer; + errorLoading = false; + source.startProduction(new GtkImageConsumer(this, source)); + } + + /** + * Constructs a blank GtkImage. This is called when + * GtkToolkit.createImage (String) is called with an empty string + * argument (""). A blank image is loaded immediately upon + * construction and has width -1 and height -1. + */ + public GtkImage () + { + isLoaded = true; + observers = null; + props = new Hashtable<String,Object>(); + errorLoading = 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 + { + String path = f.getCanonicalPath(); + synchronized(pixbufLock) + { + if (loadPixbuf(f.getCanonicalPath()) != true) + throw new IllegalArgumentException("Couldn't load image: " + + filename); + } + } + catch(IOException e) + { + IllegalArgumentException iae; + iae = new IllegalArgumentException("Couldn't load image: " + + filename); + iae.initCause(e); + throw iae; + } + + isLoaded = true; + observers = null; + props = new Hashtable<String,Object>(); + } + + /** + * Constructs a GtkImage from a byte array of an image file. + * + * @throws IllegalArgumentException if the image could not be + * loaded. + */ + public GtkImage (byte[] data) + { + synchronized(pixbufLock) + { + if (loadImageFromData (data) != true) + throw new IllegalArgumentException ("Couldn't load image."); + } + + isLoaded = true; + observers = null; + props = new Hashtable<String,Object>(); + errorLoading = false; + } + + /** + * Constructs a GtkImage from a URL. May result in an error image. + */ + public GtkImage (URL url) + { + isLoaded = false; + observers = new Vector<ImageObserver>(); + errorLoading = false; + if( url == null) + return; + ByteArrayOutputStream baos = new ByteArrayOutputStream (5000); + try + { + BufferedInputStream bis = new BufferedInputStream (url.openStream()); + + byte[] buf = new byte[5000]; + int n = 0; + + while ((n = bis.read(buf)) != -1) + baos.write(buf, 0, n); + bis.close(); + } + catch(IOException e) + { + throw new IllegalArgumentException ("Couldn't load image."); + } + byte[] array = baos.toByteArray(); + synchronized(pixbufLock) + { + if (loadImageFromData(array) != true) + throw new IllegalArgumentException ("Couldn't load image."); + } + + isLoaded = true; + observers = null; + props = new Hashtable<String,Object>(); + } + + /** + * 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<String,Object>(); + isLoaded = true; + observers = null; + + // Use the GDK scaling method. + synchronized(pixbufLock) + { + createScaledPixbuf(src, hints); + } + } + + /** + * Package private constructor to create a GtkImage from a given + * PixBuf pointer. + */ + GtkImage (Pointer pixbuf) + { + this.pixbuf = pixbuf; + synchronized(pixbufLock) + { + createFromPixbuf(); + } + isLoaded = true; + observers = null; + props = new Hashtable<String,Object>(); + } + + /** + * Wraps a buffer with a GtkImage. + * + * @param bufferPointer a pointer to an ARGB32 buffer + */ + GtkImage(int width, int height, long bufferPointer) + { + this.width = width; + this.height = height; + props = new Hashtable<String,Object>(); + isLoaded = true; + observers = null; + initFromBuffer( bufferPointer ); + } + + /** + * Returns an empty GtkImage with the errorLoading flag set. + * Called from GtkToolKit when some error occured, but an image needs + * to be returned anyway. + */ + static synchronized GtkImage getErrorImage() + { + if (errorImage == null) + { + errorImage = new GtkImage(); + errorImage.errorLoading = true; + } + return errorImage; + } + + /** + * Native helper function for constructor that takes a pixbuf Pointer. + * Should be called with the pixbufLock held. + */ + private native void createFromPixbuf(); + + /** + * 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<String,Object>(); + + if (width <= 0 || height <= 0 || pixels == null) + { + errorLoading = true; + return; + } + + synchronized(pixbufLock) + { + createPixbuf(); + setPixels(pixels); + } + isLoaded = true; + deliver(); + } + + // 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; + + int[] pixels; + synchronized (pixbufLock) + { + if (!errorLoading) + pixels = getPixels(); + else + return null; + } + return new MemoryImageSource(width, height, nativeModel, pixels, + 0, width); + } + + /** + * Does nothing. Should not be called. + */ + public Graphics getGraphics () + { + throw new IllegalAccessError("This method only works for off-screen" + +" Images."); + } + + /** + * Returns a scaled instance of this pixbuf. + */ + 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<ImageObserver>(); + isLoaded = false; + synchronized(pixbufLock) + { + freePixbuf(); + } + source.startProduction(new GtkImageConsumer(this, source)); + } + } + + public void finalize() + { + if (isLoaded) + { + synchronized(pixbufLock) + { + freePixbuf(); + } + } + } + + /** + * 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; + } + + + // 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; + } +} |