RegionSpanIterator

extends Object
implements SpanIterator

java.lang.Object
↳	sun.java2d.pipe.RegionSpanIterator

Class Overview

This class implements the ShapeIterator interface for a Region. This is useful as the source iterator of a device clip region (in its native guise), and also as the result of clipping a Region to a rectangle.

Summary

Public Constructors
	RegionSpanIterator(Region r) Constructs an instance based on the given Region

Public Methods
long	getNativeIterator() This method returns a native pointer to a function block that can be used by a native method to perform the same iteration cycle that the above methods provide while avoiding upcalls to the Java object.
void	getPathBox(int[] pathbox) Gets the bbox of the available region spans.
void	intersectClipBox(int clox, int cloy, int chix, int chiy) Intersect the box used for clipping the output spans with the given box.
boolean	nextSpan(int[] spanbox) Fetches the next span that needs to be operated on.
void	skipDownTo(int y) This method tells the iterator that it may skip all spans whose Y range is completely above the indicated Y coordinate.

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Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this object.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
final Class<?>	getClass() Returns the runtime class of this `Object`.
int	hashCode() Returns a hash code value for the object.
final void	notify() Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll() Wakes up all threads that are waiting on this object's monitor.
String	toString() Returns a string representation of the object.
final void	wait() Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
final void	wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
final void	wait(long timeout) Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.

From interface sun.java2d.pipe.SpanIterator

Public Constructors

public RegionSpanIterator (Region r)

Constructs an instance based on the given Region

Public Methods

public long getNativeIterator ()

This method returns a native pointer to a function block that can be used by a native method to perform the same iteration cycle that the above methods provide while avoiding upcalls to the Java object. The definition of the structure whose pointer is returned by this method is defined in:

     src/share/native/sun/java2d/pipe/SpanIterator.h

public void getPathBox (int[] pathbox)

Gets the bbox of the available region spans.

public void intersectClipBox (int clox, int cloy, int chix, int chiy)

Intersect the box used for clipping the output spans with the given box.

public boolean nextSpan (int[] spanbox)

Fetches the next span that needs to be operated on. If the return value is false then there are no more spans.

public void skipDownTo (int y)

This method tells the iterator that it may skip all spans whose Y range is completely above the indicated Y coordinate.

Interfaces

Classes