gnu.x11.extension
Class DBE

java.lang.Object
  gnu.x11.extension.Extension
      gnu.x11.extension.DBE

All Implemented Interfaces:

ErrorFactory

public class DBE
extends Extension
implements ErrorFactory

Double Buffer Extension. The specification can be found here (protocol).

Check this for an insightful discusson on the merit of DBE.

Nested Class Summary

class	DBE.BackBuffer
static class	DBE.ScreenVisualInfo DBE screen visual info.
static class	DBE.VisualInfo DBE visual info.

Field Summary

static int	BACKGROUND
static int	CLIENT_MAJOR_VERSION
static int	CLIENT_MINOR_VERSION
static int	COPIED
static Drawable[]	EMPTY
static java.lang.String	ERROR_STRING
static java.lang.String[]	MINOR_OPCODE_STRINGS
int	server_major_version
int	server_minor_version
static int	UNDEFINED
static int	UNTOUCHED

Fields inherited from class gnu.x11.extension.Extension

display, first_error, first_event, major_opcode, name

Constructor Summary

DBE(Display display)

Method Summary

DBE.BackBuffer	allocate(Window window, int swap_action_hint)
void	begin_idiom()
Error	build(Display display, int code, int seq_no, int bad, int minor_opcode, int major_opcode)
void	end_idiom()
java.lang.String	more_string() Additional information such as client version and server version to display in toString().
void	swap(Window[] windows, int[] actions)
void	swap(Window window, int action)
DBE.ScreenVisualInfo[]	visual_info(Drawable[] screen_specifiers) Get information about which visuals support double buffering.

Methods inherited from class gnu.x11.extension.Extension

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

MINOR_OPCODE_STRINGS

public static final java.lang.String[] MINOR_OPCODE_STRINGS

UNDEFINED

public static final int UNDEFINED

See Also:

Constant Field Values

BACKGROUND

public static final int BACKGROUND

See Also:

Constant Field Values

UNTOUCHED

public static final int UNTOUCHED

See Also:

Constant Field Values

COPIED

public static final int COPIED

See Also:

Constant Field Values

CLIENT_MAJOR_VERSION

public static final int CLIENT_MAJOR_VERSION

See Also:

Constant Field Values

CLIENT_MINOR_VERSION

public static final int CLIENT_MINOR_VERSION

See Also:

Constant Field Values

server_major_version

public int server_major_version

server_minor_version

public int server_minor_version

EMPTY

public static final Drawable[] EMPTY

ERROR_STRING

public static final java.lang.String ERROR_STRING

See Also:

Constant Field Values

Constructor Detail

DBE

public DBE(Display display)
    throws NotFoundException

Throws:

NotFoundException

Method Detail

swap

public void swap(Window[] windows,
                 int[] actions)

Parameters:

actions - array of actions; valid action: UNDEFINED BACKGROUND UNTOUCHED COPIED

See Also:

XdbeSwapBuffers

begin_idiom

public void begin_idiom()

See Also:

XdbeBeginIdiom

end_idiom

public void end_idiom()

See Also:

XdbeEndIdiom

visual_info

public DBE.ScreenVisualInfo[] visual_info(Drawable[] screen_specifiers)

Get information about which visuals support double buffering. There seems to be bug in all servers based on X Consortium sample implementation up to R6.5 (including XFree86 4.0.1 or earlier): the reply length of the reply is incorrect , causing a "read timed out" error.

Parameters:

screen_specifiers - valid: EMPTY

See Also:

XdbeGetVisualInfo

allocate

public DBE.BackBuffer allocate(Window window,
                               int swap_action_hint)

See Also:

XdbeAllocateBackBufferName, DBE.BackBuffer

build

public Error build(Display display,
                   int code,
                   int seq_no,
                   int bad,
                   int minor_opcode,
                   int major_opcode)

Specified by:

build in interface ErrorFactory

swap

public void swap(Window window,
                 int action)

See Also:

swap(Window[], int[])

more_string

public java.lang.String more_string()

Description copied from class: Extension

Additional information such as client version and server version to display in toString().

Overrides:

more_string in class Extension