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java.lang.Objectorg.eclipse.swt.widgets.Widget
org.eclipse.swt.widgets.Control
org.eclipse.swt.widgets.Scrollable
org.eclipse.swt.widgets.Composite
org.eclipse.swt.widgets.Canvas
com.jogamp.opengl.swt.GLCanvas
public class GLCanvas
Native SWT Canvas implementing GLAutoDrawable
Implementation allows use of custom GLCapabilities.
| Field Summary |
|---|
| Fields inherited from class org.eclipse.swt.widgets.Composite |
|---|
embeddedHandle |
| Fields inherited from class org.eclipse.swt.widgets.Widget |
|---|
handle |
| Fields inherited from interface javax.media.opengl.GLAutoDrawable |
|---|
SCREEN_CHANGE_ACTION_ENABLED |
| Constructor Summary | |
|---|---|
GLCanvas(org.eclipse.swt.widgets.Composite parent,
int style,
GLCapabilitiesImmutable capsReqUser,
GLCapabilitiesChooser capsChooser,
GLContext shareWith)
Creates a new SWT GLCanvas. |
|
| Method Summary | |
|---|---|
void |
addGLEventListener(GLEventListener listener)
Adds the given listener to the end of this drawable queue. |
void |
addGLEventListener(int idx,
GLEventListener listener)
Adds the given listener at the given index of this drawable queue. |
static GLCanvas |
create(org.eclipse.swt.widgets.Composite parent,
int style,
GLCapabilitiesImmutable caps,
GLCapabilitiesChooser chooser,
GLContext shareWith)
Creates an instance using GLCanvas(Composite, int, GLCapabilitiesImmutable, GLCapabilitiesChooser, GLContext)
on the SWT thread. |
GLContext |
createContext(GLContext shareWith)
Creates a new context for drawing to this drawable that will optionally share display lists and other server-side OpenGL objects with the specified GLContext. |
void |
destroy()
Destroys all resources associated with this GLAutoDrawable, inclusive the GLContext. |
void |
display()
Causes OpenGL rendering to be performed for this GLAutoDrawable in the following order: Calling display(..) for all
registered GLEventListeners. |
void |
dispose()
|
GLEventListener |
disposeGLEventListener(GLEventListener listener,
boolean remove)
Disposes the given listener via dispose(..)
if it has been initialized and added to this queue. |
GLAnimatorControl |
getAnimator()
|
boolean |
getAutoSwapBufferMode()
Indicates whether automatic buffer swapping is enabled for this drawable. |
GLCapabilitiesImmutable |
getChosenGLCapabilities()
Fetches the GLCapabilitiesImmutable corresponding to the chosen
OpenGL capabilities (pixel format / visual / GLProfile) for this drawable.On some platforms, the pixel format is not directly associated with the drawable; a best attempt is made to return a reasonable value in this case. |
GLContext |
getContext()
Returns the context associated with this drawable. |
int |
getContextCreationFlags()
|
GLDrawable |
getDelegatedDrawable()
If the implementation uses delegation, return the delegated GLDrawable instance,
otherwise return this instance. |
GLDrawableFactory |
getFactory()
Return the GLDrawableFactory being used to create this instance. |
GL |
getGL()
Returns the GL pipeline object this GLAutoDrawable uses. |
GLEventListener |
getGLEventListener(int index)
Returns the GLEventListener at the given index of this drawable queue. |
int |
getGLEventListenerCount()
Returns the number of GLEventListener of this drawable queue. |
boolean |
getGLEventListenerInitState(GLEventListener listener)
Retrieves whether the given listener is initialized or not. |
GLProfile |
getGLProfile()
Fetches the GLProfile for this drawable. |
long |
getHandle()
This is the GL/Windowing drawable handle. It is usually the NativeSurface.getSurfaceHandle(),
ie the native surface handle of the underlying windowing toolkit.However, on X11/GLX this reflects a GLXDrawable, which represents a GLXWindow, GLXPixmap, or GLXPbuffer. On EGL, this represents the EGLSurface. |
int |
getHeight()
Returns the current height of this GLDrawable. |
NativeSurface |
getNativeSurface()
Returns the underlying native surface which surface handle represents this OpenGL drawable's native resource. |
GLCapabilitiesImmutable |
getRequestedGLCapabilities()
Accessor for the GLCapabilities that were requested (via the constructor parameter). |
Object |
getUpstreamWidget()
Method may return the upstream UI toolkit object holding this GLAutoDrawable instance, if exist. |
int |
getWidth()
Returns the current width of this GLDrawable. |
boolean |
invoke(boolean wait,
GLRunnable runnable)
Enqueues a one-shot GLRunnable,
which will be executed within the next GLAutoDrawable.display() call
after all registered GLEventListeners
display(GLAutoDrawable)
methods has been called. |
boolean |
invoke(boolean wait,
List<GLRunnable> runnables)
Extends GLAutoDrawable.invoke(boolean, GLRunnable) functionality
allowing to inject a list of GLRunnables. |
boolean |
isRealized()
|
static void |
main(String[] args)
|
GLEventListener |
removeGLEventListener(GLEventListener listener)
Removes the given listener from this drawable queue. |
void |
setAnimator(GLAnimatorControl arg0)
Registers the usage of an animator, an GLAnimatorControl implementation. |
void |
setAutoSwapBufferMode(boolean arg0)
Enables or disables automatic buffer swapping for this drawable. |
GLContext |
setContext(GLContext newCtx)
Associate a new context to this drawable and also propagates the context/drawable switch by calling newCtx.setGLDrawable(drawable, true);. |
void |
setContextCreationFlags(int arg0)
|
GL |
setGL(GL arg0)
Sets the GL pipeline object this GLAutoDrawable uses. |
void |
setGLEventListenerInitState(GLEventListener listener,
boolean initialized)
Sets the given listener's initialized state. |
void |
setRealized(boolean arg0)
Indicates to on-screen GLDrawable implementations whether the underlying window has been created and can be drawn into. |
void |
swapBuffers()
Swaps the front and back buffers of this drawable. |
String |
toString()
|
void |
update()
|
| Methods inherited from class org.eclipse.swt.widgets.Canvas |
|---|
drawBackground, getCaret, getIME, scroll, setCaret, setFont, setIME |
| Methods inherited from class org.eclipse.swt.widgets.Composite |
|---|
changed, computeSize, drawBackground, getBackgroundMode, getChildren, getClientArea, getLayout, getLayoutDeferred, getTabList, isLayoutDeferred, layout, layout, layout, layout, layout, setBackgroundMode, setFocus, setLayout, setLayoutDeferred, setTabList |
| Methods inherited from class org.eclipse.swt.widgets.Scrollable |
|---|
computeTrim, getBorderWidth, getHorizontalBar, getScrollbarsMode, getVerticalBar |
| Methods inherited from class org.eclipse.swt.widgets.Control |
|---|
addControlListener, addDragDetectListener, addFocusListener, addGestureListener, addHelpListener, addKeyListener, addMenuDetectListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addMouseWheelListener, addPaintListener, addTouchListener, addTraverseListener, computeSize, dragDetect, dragDetect, forceFocus, getAccessible, getBackground, getBackgroundImage, getBounds, getCursor, getDragDetect, getEnabled, getFont, getForeground, getLayoutData, getLocation, getMenu, getMonitor, getOrientation, getParent, getRegion, getShell, getSize, getToolTipText, getTouchEnabled, getVisible, internal_dispose_GC, internal_new_GC, isEnabled, isFocusControl, isReparentable, isVisible, moveAbove, moveBelow, pack, pack, print, redraw, redraw, removeControlListener, removeDragDetectListener, removeFocusListener, removeGestureListener, removeHelpListener, removeKeyListener, removeMenuDetectListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removeMouseWheelListener, removePaintListener, removeTouchListener, removeTraverseListener, setBackground, setBackgroundImage, setBounds, setBounds, setCapture, setCursor, setDragDetect, setEnabled, setForeground, setLayoutData, setLocation, setLocation, setMenu, setOrientation, setParent, setRedraw, setRegion, setSize, setSize, setToolTipText, setTouchEnabled, setVisible, toControl, toControl, toDisplay, toDisplay, traverse, traverse, traverse |
| Methods inherited from class org.eclipse.swt.widgets.Widget |
|---|
addDisposeListener, addListener, getData, getData, getDisplay, getListeners, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, reskin, setData, setData |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public GLCanvas(org.eclipse.swt.widgets.Composite parent,
int style,
GLCapabilitiesImmutable capsReqUser,
GLCapabilitiesChooser capsChooser,
GLContext shareWith)
parent - Required (non-null) parent Composite.style - Optional SWT style bit-field. The SWT.NO_BACKGROUND bit is set before passing this up to the
Canvas constructor, so OpenGL handles the background.capsReqUser - Optional GLCapabilities. If not provided, the default capabilities for the default GLProfile for the
graphics device determined by the parent Composite are used. Note that the GLCapabilities that are
actually used may differ based on the capabilities of the graphics device.capsChooser - Optional GLCapabilitiesChooser to customize the selection of the used GLCapabilities based on the
requested GLCapabilities, and the available capabilities of the graphics device.shareWith - Optional GLContext to share state (textures, vbos, shaders, etc.) with.| Method Detail |
|---|
public static GLCanvas create(org.eclipse.swt.widgets.Composite parent,
int style,
GLCapabilitiesImmutable caps,
GLCapabilitiesChooser chooser,
GLContext shareWith)
GLCanvas(Composite, int, GLCapabilitiesImmutable, GLCapabilitiesChooser, GLContext)
on the SWT thread.
parent - Required (non-null) parent Composite.style - Optional SWT style bit-field. The SWT.NO_BACKGROUND bit is set before passing this up to the
Canvas constructor, so OpenGL handles the background.caps - Optional GLCapabilities. If not provided, the default capabilities for the default GLProfile for the
graphics device determined by the parent Composite are used. Note that the GLCapabilities that are
actually used may differ based on the capabilities of the graphics device.chooser - Optional GLCapabilitiesChooser to customize the selection of the used GLCapabilities based on the
requested GLCapabilities, and the available capabilities of the graphics device.shareWith - Optional GLContext to share state (textures, vbos, shaders, etc.) with.
public void update()
update in class org.eclipse.swt.widgets.Controlpublic void dispose()
dispose in class org.eclipse.swt.widgets.Widgetpublic void display()
GLAutoDrawableCauses OpenGL rendering to be performed for this GLAutoDrawable in the following order:
display(..) for all
registered GLEventListeners. GLRunnable,
enqueued via GLAutoDrawable.invoke(boolean, GLRunnable).
May be called periodically by a running GLAnimatorControl implementation,
which must register itself with GLAutoDrawable.setAnimator(javax.media.opengl.GLAnimatorControl).
Called automatically by the window system toolkit upon receiving a repaint() request,
except an GLAnimatorControl implementation GLAnimatorControl.isAnimating().
This routine may also be called manually for better control over the
rendering process. It is legal to call another GLAutoDrawable's
display method from within the display(..) callback.
In case of a new generated OpenGL context,
the implementation shall call init(..) for all
registered GLEventListeners before making the
actual display(..) calls,
in case this has not been done yet.
display in interface GLAutoDrawableGLAutoDrawable.setAnimator(javax.media.opengl.GLAnimatorControl)public final Object getUpstreamWidget()
GLAutoDrawableGLAutoDrawable instance, if exist.
Currently known Java UI toolkits and it's known return types are:
| Toolkit | GLAutoDrawable Implementation | ~ | Return Type of getUpstreamWidget() |
| NEWT | GLWindow | has a | Window |
| SWT | GLCanvas | is a | Canvas |
| AWT | GLCanvas | is a | Canvas |
| AWT | GLJPanel | is a | JPanel |
This method may also return null if no UI toolkit is being used,
as common for offscreen rendering.
getUpstreamWidget in interface GLAutoDrawablepublic int getWidth()
GLDrawable
getWidth in interface GLDrawablepublic int getHeight()
GLDrawable
getHeight in interface GLDrawablepublic void addGLEventListener(GLEventListener listener)
GLAutoDrawablelistener to the end of this drawable queue.
The listeners are notified of events in the order of the queue.
The newly added listener's init(..)
method will be called once before any other of it's callback methods.
See GLAutoDrawable.getGLEventListenerInitState(GLEventListener) for details.
addGLEventListener in interface GLAutoDrawablelistener - The GLEventListener object to be inserted
public void addGLEventListener(int idx,
GLEventListener listener)
throws IndexOutOfBoundsException
GLAutoDrawablelistener at the given index of this drawable queue.
The listeners are notified of events in the order of the queue.
The newly added listener's init(..)
method will be called once before any other of it's callback methods.
See GLAutoDrawable.getGLEventListenerInitState(GLEventListener) for details.
addGLEventListener in interface GLAutoDrawableidx - Position where the listener will be inserted.
Should be within (0 <= index && index <= size()).
An index value of -1 is interpreted as the end of the list, size().listener - The GLEventListener object to be inserted
IndexOutOfBoundsException - If the index is not within (0 <= index && index <= size()), or -1public int getGLEventListenerCount()
GLAutoDrawableGLEventListener of this drawable queue.
getGLEventListenerCount in interface GLAutoDrawable
public GLEventListener getGLEventListener(int index)
throws IndexOutOfBoundsException
GLAutoDrawableGLEventListener at the given index of this drawable queue.
getGLEventListener in interface GLAutoDrawableindex - Position of the listener to be returned.
Should be within (0 <= index && index < size()).
An index value of -1 is interpreted as last listener, size()-1.
IndexOutOfBoundsException - If the index is not within (0 <= index && index < size()), or -1public boolean getGLEventListenerInitState(GLEventListener listener)
GLAutoDrawablelistener is initialized or not.
After adding a GLEventListener it is
marked uninitialized and added to a list of to be initialized GLEventListener.
If such uninitialized GLEventListener's handler methods (reshape, display)
are about to be invoked, it's init(..) method is invoked first.
Afterwards the GLEventListener is marked initialized
and removed from the list of to be initialized GLEventListener.
This methods returns the GLEventListener initialized state,
i.e. returns false if it is included in the list of to be initialized GLEventListener,
otherwise true.
getGLEventListenerInitState in interface GLAutoDrawablelistener - the GLEventListener object to query it's initialized state.
public void setGLEventListenerInitState(GLEventListener listener,
boolean initialized)
GLAutoDrawablelistener's initialized state.
This methods allows manually setting the GLEventListener initialized state,
i.e. adding it to, or removing it from the list of to be initialized GLEventListener.
See GLAutoDrawable.getGLEventListenerInitState(GLEventListener) for details.
Warning: This method does not validate whether the given listener's
is member of this drawable queue, i.e. added.
This method is only exposed to allow users full control over the GLEventListener's state
and is usually not recommended to change.
One use case is moving a GLContext and their initialized GLEventListener
from one GLAutoDrawable to another,
where a subsequent init(..) call after adding it
to the new owner is neither required nor desired.
See swapGLContextAndAllGLEventListener(..).
setGLEventListenerInitState in interface GLAutoDrawablelistener - the GLEventListener object to perform a state change.initialized - if true, mark the listener initialized, otherwise uninitialized.
public GLEventListener disposeGLEventListener(GLEventListener listener,
boolean remove)
GLAutoDrawablelistener via dispose(..)
if it has been initialized and added to this queue.
If remove is true, the GLEventListener is removed from this drawable queue before disposal,
otherwise marked uninitialized.
If an GLAnimatorControl is being attached and the current thread is different
than the animator's thread, it is paused during the operation.
Note that this is an expensive operation, since dispose(..)
is decorated by GLContext.makeCurrent() and GLContext.release().
Use removeGLEventListener(listener) instead
if you just want to remove the listener and don't care about the disposal of the it's (OpenGL) resources.
Also note that this is done from within a particular drawable's
GLEventListener handler (reshape, display, etc.), that it is not
guaranteed that all other listeners will be evaluated properly
during this update cycle.
disposeGLEventListener in interface GLAutoDrawablelistener - The GLEventListener object to be disposed and removed if remove is trueremove - pass true to have the listener removed from this drawable queue, otherwise pass false
public GLEventListener removeGLEventListener(GLEventListener listener)
GLAutoDrawablelistener from this drawable queue.
This is an inexpensive operation, since the removed listener's
dispose(..) method will not be called.
Use disposeGLEventListener(listener, true)
instead to ensure disposal of the listener's (OpenGL) resources.
Note that if this is done from within a particular drawable's
GLEventListener handler (reshape, display, etc.), that it is not
guaranteed that all other listeners will be evaluated properly
during this update cycle.
removeGLEventListener in interface GLAutoDrawablelistener - The GLEventListener object to be removed
public void destroy()
dispose(..) for all
registered GLEventListeners. Called automatically by the
window system toolkit upon receiving a destroy notification. This
routine may be called manually.
This impl. calls this class's dispose() SWT override,
where the actual implementation resides.
destroy in interface GLAutoDrawablepublic GLAnimatorControl getAnimator()
getAnimator in interface GLAutoDrawableGLAnimatorControl implementation, using this GLAutoDrawable.GLAutoDrawable.setAnimator(javax.media.opengl.GLAnimatorControl),
GLAnimatorControlpublic boolean getAutoSwapBufferMode()
GLAutoDrawableGLAutoDrawable.setAutoSwapBufferMode(boolean).
getAutoSwapBufferMode in interface GLAutoDrawablepublic final GLDrawable getDelegatedDrawable()
GLAutoDrawableGLDrawable instance,
otherwise return this instance.
getDelegatedDrawable in interface GLAutoDrawablepublic GLContext getContext()
GLAutoDrawable
getContext in interface GLAutoDrawablepublic int getContextCreationFlags()
getContextCreationFlags in interface GLAutoDrawablepublic GL getGL()
GLAutoDrawableGL pipeline object this GLAutoDrawable uses.
If this method is called outside of the GLEventListener's callback methods (init, display, etc.) it may
return null. Users should not rely on the identity of the
returned GL object; for example, users should not maintain a
hash table with the GL object as the key. Additionally, the GL
object should not be cached in client code, but should be
re-fetched from the GLAutoDrawable at the beginning of each call
to init, display, etc.
getGL in interface GLAutoDrawable
public boolean invoke(boolean wait,
GLRunnable runnable)
GLAutoDrawableGLRunnable,
which will be executed within the next GLAutoDrawable.display() call
after all registered GLEventListeners
display(GLAutoDrawable)
methods has been called.
If no GLAnimatorControl is animating (default),
or if the current thread is the animator thread,
a GLAutoDrawable.display() call is issued after enqueue the GLRunnable,
hence the GLRunnable will be executed right away.
If an animator is running,
no explicit GLAutoDrawable.display() call is issued, allowing the animator to perform it when it's due.
If wait is true the call blocks until the glRunnable
has been executed by the animator, otherwise the method returns immediately.
If wait is true and
GLDrawable.isRealized() returns false or GLAutoDrawable.getContext() returns null,
the call is ignored and returns false.
This helps avoiding deadlocking the caller.
The internal queue of GLRunnable's is being flushed with GLAutoDrawable.destroy()
where all blocked callers are being notified.
invoke in interface GLAutoDrawablewait - if true block until execution of glRunnable is finished, otherwise return immediately w/o waitingrunnable - the GLRunnable to execute within GLAutoDrawable.display()
true if the GLRunnable has been processed or queued, otherwise false.GLAutoDrawable.setAnimator(GLAnimatorControl),
GLAutoDrawable.display(),
GLRunnable,
#enqueue(GLRunnable)
public boolean invoke(boolean wait,
List<GLRunnable> runnables)
GLAutoDrawableGLAutoDrawable.invoke(boolean, GLRunnable) functionality
allowing to inject a list of GLRunnables.
invoke in interface GLAutoDrawablewait - if true block until execution of the last glRunnable is finished, otherwise return immediately w/o waitingrunnables - the GLRunnables to execute within GLAutoDrawable.display()
true if the GLRunnables has been processed or queued, otherwise false.
public void setAnimator(GLAnimatorControl arg0)
throws GLException
GLAutoDrawable
Registers the usage of an animator, an GLAnimatorControl implementation.
The animator will be queried whether it's animating, ie periodically issuing GLAutoDrawable.display() calls or not.
This method shall be called by an animator implementation only,
e.g. AnimatorBase.add(javax.media.opengl.GLAutoDrawable), passing it's control implementation,
and AnimatorBase.remove(javax.media.opengl.GLAutoDrawable), passing null.
Impacts GLAutoDrawable.display() and GLAutoDrawable.invoke(boolean, GLRunnable) semantics.
setAnimator in interface GLAutoDrawableGLException - if an animator is already registered.GLAutoDrawable.display(),
GLAutoDrawable.invoke(boolean, GLRunnable),
GLAnimatorControlpublic void setAutoSwapBufferMode(boolean arg0)
GLAutoDrawableGLDrawable.swapBuffers(..) manually.
setAutoSwapBufferMode in interface GLAutoDrawablepublic GLContext setContext(GLContext newCtx)
GLAutoDrawablenewCtx.setGLDrawable(drawable, true);.
drawable might be an inner GLDrawable instance if using a delegation pattern,
or this GLAutoDrawable instance.
If the old or new context was current on this thread, it is being released before switching the drawable. The new context will be made current afterwards, if it was current before. However the user shall take extra care that no other thread attempts to make this context current.
Be aware that the old context is still bound to the drawable, and that one context can only be bound to one drawable at one time!
In case you do not intend to use the old context anymore, i.e. not assigning it to another drawable, it shall be destroyed before setting the new context, i.e.:
GLContext oldCtx = glad.getContext();
if(null != oldCtx) {
oldCtx.destroy();
}
glad.setContext(newCtx);
This is required, since a context must have a valid drawable at all times
and this API shall not restrict the user in any way.
setContext in interface GLAutoDrawablenewCtx - the new context
nullGLContext.setGLDrawable(GLDrawable, boolean),
GLContext.setGLReadDrawable(GLDrawable),
GLDrawableHelper.switchContext(GLDrawable, GLContext, GLContext, int)public void setContextCreationFlags(int arg0)
setContextCreationFlags in interface GLAutoDrawablearg0 - Additional context creation flags.GLContext.setContextCreationFlags(int),
GLContext.enableGLDebugMessage(boolean)public GL setGL(GL arg0)
GLAutoDrawableGL pipeline object this GLAutoDrawable uses.
This should only be called from within the GLEventListener's
callback methods, and usually only from within the init()
method, in order to install a composable pipeline. See the JOGL
demos for examples.
setGL in interface GLAutoDrawablepublic GLContext createContext(GLContext shareWith)
GLAutoDrawable
The GLContext share need not be associated with this
GLDrawable and may be null if sharing of display lists and other
objects is not desired. See the note in the overview
documentation on
context sharing.
This GLAutoDrawable implementation holds it's own GLContext reference,
thus created a GLContext using this methods won't replace it implicitly.
To replace or set this GLAutoDrawable's GLContext you need to call GLAutoDrawable.setContext(GLContext).
The GLAutoDrawable implementation shall also set the
context creation flags as customized w/ GLAutoDrawable.setContextCreationFlags(int).
createContext in interface GLAutoDrawablecreateContext in interface GLDrawablepublic GLCapabilitiesImmutable getChosenGLCapabilities()
GLDrawableGLCapabilitiesImmutable corresponding to the chosen
OpenGL capabilities (pixel format / visual / GLProfile) for this drawable.NativeSurface's
AbstractGraphicsConfiguration, and if changes are necessary,
they should reflect those as well.
getChosenGLCapabilities in interface GLDrawablepublic GLCapabilitiesImmutable getRequestedGLCapabilities()
public GLDrawableFactory getFactory()
GLDrawableGLDrawableFactory being used to create this instance.
getFactory in interface GLDrawablepublic GLProfile getGLProfile()
GLDrawableGLProfile for this drawable.
Returns the GLProfile object, no copy.
getGLProfile in interface GLDrawablepublic long getHandle()
GLDrawableNativeSurface.getSurfaceHandle(),
ie the native surface handle of the underlying windowing toolkit.
getHandle in interface GLDrawablepublic NativeSurface getNativeSurface()
GLDrawable
getNativeSurface in interface GLDrawableGLDrawable.getHandle()public boolean isRealized()
isRealized in interface GLDrawablepublic void setRealized(boolean arg0)
GLDrawablesetRealized on a GLCanvas, a GLJPanel, or a
GLPbuffer, as these perform the appropriate calls on their
underlying GLDrawables internally.
Developers implementing new OpenGL components for various window
toolkits need to call this method against GLDrawables obtained
from the GLDrawableFactory via the GLDrawableFactory.getGLDrawable() method. It must typically be
called with an argument of true when the component
associated with the GLDrawable is realized and with an argument
of false just before the component is unrealized.
For the AWT, this means calling setRealized(true) in
the addNotify method and with an argument of
false in the removeNotify method.
GLDrawable implementations should handle multiple
cycles of setRealized(true) /
setRealized(false) calls. Most, if not all, Java
window toolkits have a persistent object associated with a given
component, regardless of whether that component is currently
realized. The GLDrawable object associated with a
particular component is intended to be similarly persistent. A
GLDrawable is intended to be created for a given
component when it is constructed and live as long as that
component. setRealized allows the
GLDrawable to re-initialize and destroy any
associated resources as the component becomes realized and
unrealized, respectively.
With an argument of true,
the minimum implementation shall call
NativeSurface's lockSurface() and if successfull:
GLCapabilities, which are associated with
the attached NativeSurface's AbstractGraphicsConfiguration.NativeSurface's unlockSurface().NativeSurface's lockSurface()
ensures resolving the window/surface handles, and the drawable's GLCapabilities
might have changed.
Calling this method has no other effects. For example, if
removeNotify is called on a Canvas implementation
for which a GLDrawable has been created, it is also necessary to
destroy all OpenGL contexts associated with that GLDrawable. This
is not done automatically by the implementation.
setRealized in interface GLDrawable
public void swapBuffers()
throws GLException
GLDrawableGLAutoDrawable implementations, when automatic buffer swapping
is enabled (as is the default), this method is called
automatically and should not be called by the end user.
swapBuffers in interface GLDrawableGLExceptionpublic String toString()
toString in interface GLDrawabletoString in class org.eclipse.swt.widgets.Widgetpublic static void main(String[] args)
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