javax.media.nativewindow

Class DefaultGraphicsDevice

java.lang.Object

javax.media.nativewindow.DefaultGraphicsDevice

All Implemented Interfaces:

Cloneable, AbstractGraphicsDevice

Direct Known Subclasses:

AWTGraphicsDevice, EGLGraphicsDevice, MacOSXGraphicsDevice, WindowsGraphicsDevice, X11GraphicsDevice

public class DefaultGraphicsDevice
extends Object
implements Cloneable, AbstractGraphicsDevice

Field Summary

Fields inherited from interface javax.media.nativewindow.AbstractGraphicsDevice

DEBUG, DEFAULT_CONNECTION, DEFAULT_UNIT, EXTERNAL_CONNECTION

Constructor Summary

Constructors

Constructor and Description
DefaultGraphicsDevice(String type, String connection, int unitID) Create an instance with the system default ToolkitLock, gathered via NativeWindowFactory.getDefaultToolkitLock(String).
DefaultGraphicsDevice(String type, String connection, int unitID, long handle) Create an instance with the system default ToolkitLock.
DefaultGraphicsDevice(String type, String connection, int unitID, long handle, ToolkitLock locker) Create an instance with the given ToolkitLock instance, or null ToolkitLock if null.

Method Summary

Methods

Modifier and Type	Method and Description
void	clearHandleOwner()
Object	clone()
boolean	close() Optionally closing the device if handle is not null.
String	getConnection() Returns the semantic GraphicsDevice connection. On platforms supporting remote devices, eg via tcp/ip network, the implementation shall return a unique name for each remote address. On X11 for example, the connection string should be as the following example. :0.0 for a local connection remote.host.net:0.0 for a remote connection To support multiple local device, see AbstractGraphicsDevice.getUnitID().
long	getHandle() Returns the native handle of the underlying native device, if such thing exist.
ToolkitLock	getToolkitLock()
String	getType() Returns the type of the underlying subsystem, ie NativeWindowFactory.TYPE_KD, NativeWindowFactory.TYPE_X11, ..
String	getUniqueID() Returns a unique ID object of this device using type, connection and unitID as it's key components.
int	getUnitID() Returns the graphics device unit ID. The unit ID support multiple graphics device configurations on a local machine. To support remote device, see AbstractGraphicsDevice.getConnection().
boolean	isHandleOwner()
void	lock() Optionally locking the device, utilizing eg ToolkitLock.lock().
boolean	open() Optionally [re]opening the device if handle is null.
static void	swapDeviceHandleAndOwnership(DefaultGraphicsDevice aDevice1, DefaultGraphicsDevice aDevice2)
String	toString()
void	unlock() Optionally unlocking the device, utilizing eg ToolkitLock.unlock().
void	validateLocked()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultGraphicsDevice

public DefaultGraphicsDevice(String type,
                     String connection,
                     int unitID)

Create an instance with the system default ToolkitLock, gathered via NativeWindowFactory.getDefaultToolkitLock(String).

Parameters:

type -

DefaultGraphicsDevice

public DefaultGraphicsDevice(String type,
                     String connection,
                     int unitID,
                     long handle)

Create an instance with the system default ToolkitLock. gathered via NativeWindowFactory.getDefaultToolkitLock(String, long).

Parameters:

type -

handle -

DefaultGraphicsDevice

public DefaultGraphicsDevice(String type,
                     String connection,
                     int unitID,
                     long handle,
                     ToolkitLock locker)

Create an instance with the given ToolkitLock instance, or null ToolkitLock if null.

Parameters:

type -

handle -

locker - if null, a non blocking null lock is used.

Method Detail

clone

public Object clone()

Specified by:

clone in interface AbstractGraphicsDevice

Overrides:

clone in class Object

getType

public final String getType()

Description copied from interface: AbstractGraphicsDevice

Returns the type of the underlying subsystem, ie NativeWindowFactory.TYPE_KD, NativeWindowFactory.TYPE_X11, ..

Specified by:

getType in interface AbstractGraphicsDevice

getConnection

public final String getConnection()

Description copied from interface: AbstractGraphicsDevice

Returns the semantic GraphicsDevice connection.
On platforms supporting remote devices, eg via tcp/ip network, the implementation shall return a unique name for each remote address.
On X11 for example, the connection string should be as the following example.

• :0.0 for a local connection
• remote.host.net:0.0 for a remote connection

To support multiple local device, see AbstractGraphicsDevice.getUnitID().

Specified by:

getConnection in interface AbstractGraphicsDevice

getUnitID

public final int getUnitID()

Description copied from interface: AbstractGraphicsDevice

Returns the graphics device unit ID.
The unit ID support multiple graphics device configurations on a local machine.
To support remote device, see AbstractGraphicsDevice.getConnection().

Specified by:

getUnitID in interface AbstractGraphicsDevice

Returns:

getUniqueID

public final String getUniqueID()

Description copied from interface: AbstractGraphicsDevice

Returns a unique ID object of this device using type, connection and unitID as it's key components.

The unique ID does not reflect the instance of the device, hence the handle is not included. The unique ID may be used as a key for semantic device mapping.

The returned string object reference is unique using String.intern() and hence can be used as a key itself.

Specified by:

getUniqueID in interface AbstractGraphicsDevice

getHandle

public final long getHandle()

Description copied from interface: AbstractGraphicsDevice

Returns the native handle of the underlying native device, if such thing exist.

Specified by:

getHandle in interface AbstractGraphicsDevice

lock

public final void lock()

Optionally locking the device, utilizing eg ToolkitLock.lock(). The lock implementation must be recursive.

Locking is perfomed via delegation to ToolkitLock.lock(), ToolkitLock.unlock().

Specified by:

lock in interface AbstractGraphicsDevice

See Also:

DefaultGraphicsDevice#DefaultGraphicsDevice(java.lang.String, long), DefaultGraphicsDevice#DefaultGraphicsDevice(java.lang.String, long, javax.media.nativewindow.ToolkitLock)

validateLocked

public final void validateLocked()
                          throws RuntimeException

Specified by:

validateLocked in interface AbstractGraphicsDevice

Throws:

RuntimeException - if current thread does not hold the lock

unlock

public final void unlock()

Optionally unlocking the device, utilizing eg ToolkitLock.unlock(). The lock implementation must be recursive.

Locking is perfomed via delegation to ToolkitLock.lock(), ToolkitLock.unlock().

Specified by:

unlock in interface AbstractGraphicsDevice

See Also:

DefaultGraphicsDevice#DefaultGraphicsDevice(java.lang.String, long), DefaultGraphicsDevice#DefaultGraphicsDevice(java.lang.String, long, javax.media.nativewindow.ToolkitLock)

open

public boolean open()

Description copied from interface: AbstractGraphicsDevice

Optionally [re]opening the device if handle is null.

The default implementation is a NOP.

Example implementations like X11GraphicsDevice or EGLGraphicsDevice issue the native open operation in case handle is null.

Specified by:

open in interface AbstractGraphicsDevice

Returns:

true if the handle was null and opening was successful, otherwise false.

close

public boolean close()

Description copied from interface: AbstractGraphicsDevice

Optionally closing the device if handle is not null.

The default implementation dispose it's ToolkitLock and sets the handle to null.

Example implementations like X11GraphicsDevice or EGLGraphicsDevice issue the native close operation or skip it depending on the handles's ownership.

Specified by:

close in interface AbstractGraphicsDevice

Returns:

true if the handle was not null and closing was successful, otherwise false.

isHandleOwner

public boolean isHandleOwner()

Specified by:

isHandleOwner in interface AbstractGraphicsDevice

Returns:

true if instance owns the handle to issue AbstractGraphicsDevice.close(), otherwise false.

clearHandleOwner

public void clearHandleOwner()

Specified by:

clearHandleOwner in interface AbstractGraphicsDevice

toString

public String toString()

Overrides:

toString in class Object

swapDeviceHandleAndOwnership

public static final void swapDeviceHandleAndOwnership(DefaultGraphicsDevice aDevice1,
                                DefaultGraphicsDevice aDevice2)

getToolkitLock

public final ToolkitLock getToolkitLock()

Returns:

the used ToolkitLock

See Also:

DefaultGraphicsDevice#DefaultGraphicsDevice(java.lang.String, long), DefaultGraphicsDevice#DefaultGraphicsDevice(java.lang.String, long, javax.media.nativewindow.ToolkitLock)