Class GtkVolatileImage

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

public GtkVolatileImage(int width,
                        int height)

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

public boolean contentsLost()

Overrides:

contentsLost in interface VolatileImage

public 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

public Graphics2D createGraphics()

Overrides:

createGraphics in interface VolatileImage

public void dispose()

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

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

See Also:

System.gc(), System.runFinalizersOnExit(boolean), java.lang.ref

public ImageCapabilities getCapabilities()

Overrides:

getCapabilities in interface VolatileImage

public Graphics getGraphics()

Overrides:

getGraphics in interface VolatileImage

public int getHeight()

Overrides:

getHeight in interface VolatileImage

public int getHeight(ImageObserver observer)

Overrides:

getHeight in interface Image

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.

public Object getProperty(String name,
                          ImageObserver observer)

Overrides:

getProperty in interface Image

public BufferedImage getSnapshot()

Overrides:

getSnapshot in interface VolatileImage

public int getWidth()

Overrides:

getWidth in interface VolatileImage

public int getWidth(ImageObserver observer)

Overrides:

getWidth in interface Image

public int validate(GraphicsConfiguration gc)

Overrides:

validate in interface VolatileImage