javax.media.nativewindow
Interface AbstractGraphicsDevice

All Superinterfaces:

Cloneable

All Known Implementing Classes:

AWTGraphicsDevice, DefaultGraphicsDevice, EGLGraphicsDevice, MacOSXGraphicsDevice, WindowsGraphicsDevice, X11GraphicsDevice

public interface AbstractGraphicsDevice
extends Cloneable

A interface describing a graphics device in a toolkit-independent manner.

Field Summary

static String	DEFAULT_CONNECTION Dummy connection value for a default connection where no native support for multiple devices is available
static int	DEFAULT_UNIT Default unit id for the 1st device: 0
static String	EXTERNAL_CONNECTION Dummy connection value for an external connection where no native support for multiple devices is available

Method Summary

boolean	close() Optionally closing the device.
String	getConnection() Returns the semantic GraphicsDevice connection.
long	getHandle() Returns the native handle of the underlying native device, if such thing exist.
String	getType() Returns the type of the underlying subsystem, ie NativeWindowFactory.TYPE_KD, NativeWindowFactory.TYPE_X11, ..
String	getUniqueID() Returns a unique ID String of this device using type, connection and unitID.
int	getUnitID() Returns the graphics device unit ID.
void	lock() Optionally locking the device, utilizing eg ToolkitLock.
void	unlock() Optionally unlocking the device, utilizing eg ToolkitLock.

Field Detail

DEFAULT_CONNECTION

static final String DEFAULT_CONNECTION

Dummy connection value for a default connection where no native support for multiple devices is available

See Also:

Constant Field Values

EXTERNAL_CONNECTION

static final String EXTERNAL_CONNECTION

Dummy connection value for an external connection where no native support for multiple devices is available

See Also:

Constant Field Values

DEFAULT_UNIT

static final int DEFAULT_UNIT

Default unit id for the 1st device: 0

See Also:

Constant Field Values

Method Detail

getType

String getType()

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

getConnection

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 getUnitID().

getUnitID

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 getConnection().

Returns:

getUniqueID

String getUniqueID()

Returns a unique ID String of this device using type, connection and unitID.
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.

getHandle

long getHandle()

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

lock

void lock()

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

unlock

void unlock()

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

close

boolean close()

Optionally closing the device.

The default implementation is a NOP, just setting the handle to null.

The specific implementing, ie X11GraphicsDevice, shall have a enable/disable like javax.media.nativewindow.x11.X11GraphicsDevice#setCloseDisplay(boolean, boolean),
which shall be invoked at creation time to determine ownership/role of freeing the resource.

Returns:

true if the handle was not null, otherwise false.