gnu.java.awt.peer.gtk

Class GtkVolatileImage

Implemented Interfaces:
Transparency

public class GtkVolatileImage
extends VolatileImage

Field Summary

Fields inherited from class java.awt.image.VolatileImage

IMAGE_INCOMPATIBLE, IMAGE_OK, IMAGE_RESTORED, transparency

Fields inherited from class java.awt.Image

SCALE_AREA_AVERAGING, SCALE_DEFAULT, SCALE_FAST, SCALE_REPLICATE, SCALE_SMOOTH, UndefinedProperty, accelerationPriority

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

GtkVolatileImage(GtkComponentPeer component, int width, int height, ImageCapabilities caps)
GtkVolatileImage(int width, int height)
GtkVolatileImage(int width, int height, ImageCapabilities caps)

Method Summary

boolean
contentsLost()
void
copyArea(int x, int y, int w, int h, int dx, int dy)
protected static SampleModel
createGdkSampleModel(int w, int h)
Creates a SampleModel that matches GDK's native format
Graphics2D
createGraphics()
void
dispose()
void
drawVolatile(long srcPtr, int x, int y, int w, int h)
void
finalize()
Called on an object by the Virtual Machine at most once, at some point after the Object is determined unreachable but before it is destroyed.
ImageCapabilities
getCapabilities()
Graphics
getGraphics()
int
getHeight()
int
getHeight(ImageObserver observer)
int[]
getPixels()
Gets the pixels in the current image from GDK.
Object
getProperty(String name, ImageObserver observer)
BufferedImage
getSnapshot()
int
getWidth()
int
getWidth(ImageObserver observer)
int
validate(GraphicsConfiguration gc)

Methods inherited from class java.awt.image.VolatileImage

contentsLost, createGraphics, flush, getCapabilities, getGraphics, getHeight, getSnapshot, getSource, getTransparency, getWidth, validate

Methods inherited from class java.awt.Image

flush, getAccelerationPriority, getGraphics, getHeight, getProperty, getScaledInstance, getSource, getWidth, setAccelerationPriority

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GtkVolatileImage

public GtkVolatileImage(GtkComponentPeer component,
                        int width,
                        int height,
                        ImageCapabilities caps)

GtkVolatileImage

public GtkVolatileImage(int width,
                        int height)

GtkVolatileImage

public GtkVolatileImage(int width,
                        int height,
                        ImageCapabilities caps)

Method Details

contentsLost

public boolean contentsLost()
Overrides:
contentsLost in interface VolatileImage

copyArea

public void copyArea(int x,
                     int y,
                     int w,
                     int h,
                     int dx,
                     int dy)

createGdkSampleModel

protected static SampleModel createGdkSampleModel(int w,
                                                  int h)
Creates a SampleModel that matches GDK's native format

createGraphics

public Graphics2D createGraphics()
Overrides:
createGraphics in interface VolatileImage

dispose

public void dispose()

drawVolatile

public void drawVolatile(long srcPtr,
                         int x,
                         int y,
                         int w,
                         int h)

finalize

public void finalize()
Called on an object by the Virtual Machine at most once, at some point after the Object is determined unreachable but before it is destroyed. You would think that this means it eventually is called on every Object, but this is not necessarily the case. If execution terminates abnormally, garbage collection does not always happen. Thus you cannot rely on this method to always work. For finer control over garbage collection, use references from the java.lang.ref package.

Virtual Machines are free to not call this method if they can determine that it does nothing important; for example, if your class extends Object and overrides finalize to do simply super.finalize().

finalize() will be called by a Thread that has no locks on any Objects, and may be called concurrently. There are no guarantees on the order in which multiple objects are finalized. This means that finalize() is usually unsuited for performing actions that must be thread-safe, and that your implementation must be use defensive programming if it is to always work.

If an Exception is thrown from finalize() during garbage collection, it will be patently ignored and the Object will still be destroyed.

It is allowed, although not typical, for user code to call finalize() directly. User invocation does not affect whether automatic invocation will occur. It is also permitted, although not recommended, for a finalize() method to "revive" an object by making it reachable from normal code again.

Unlike constructors, finalize() does not get called for an object's superclass unless the implementation specifically calls super.finalize().

The default implementation does nothing.

Overrides:
finalize in interface Object

getCapabilities

public ImageCapabilities getCapabilities()
Overrides:
getCapabilities in interface VolatileImage

getGraphics

public Graphics getGraphics()
Overrides:
getGraphics in interface VolatileImage

getHeight

public int getHeight()
Overrides:
getHeight in interface VolatileImage

getHeight

public int getHeight(ImageObserver observer)
Overrides:
getHeight in interface Image

getPixels

public int[] getPixels()
Gets the pixels in the current image from GDK. Note that pixels are in 32-bit RGBA, non-premultiplied, which is different from Cairo's premultiplied ARGB, which is different from Java's standard non-premultiplied ARGB. Caution is advised when using this method, to ensure that the data format remains consistent with what you expect.
Returns:
the current pixels, as reported by GDK.

getProperty

public Object getProperty(String name,
                          ImageObserver observer)
Overrides:
getProperty in interface Image

getSnapshot

public BufferedImage getSnapshot()
Overrides:
getSnapshot in interface VolatileImage

getWidth

public int getWidth()
Overrides:
getWidth in interface VolatileImage

getWidth

public int getWidth(ImageObserver observer)
Overrides:
getWidth in interface Image

validate

public int validate(GraphicsConfiguration gc)
Overrides:
validate in interface VolatileImage

GtkVolatileImage.java -- wraps an X pixmap 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.