The implementation shall initialize itself as soon as possible, ie if the attached {@link javax.media.nativewindow.NativeSurface NativeSurface} becomes visible/realized. The following protocol shall be satisfied:
Another implementation detail is the drawable reconfiguration. One use case is where a window is being
dragged to another screen with a different pixel configuration, ie {@link GLCapabilities}. The implementation
shall be able to detect such cases in conjunction with the associated {@link javax.media.nativewindow.NativeSurface NativeSurface}.
For example, AWT's {@link java.awt.Canvas} 's {@link java.awt.Canvas#getGraphicsConfiguration getGraphicsConfiguration()}
is capable to determine a display device change. This is demonstrated within {@link javax.media.opengl.awt.GLCanvas}'s
and NEWT's AWTCanvas {@link javax.media.opengl.awt.GLCanvas#getGraphicsConfiguration getGraphicsConfiguration()}
specialization. Another demonstration is NEWT's {@link javax.media.nativewindow.NativeWindow NativeWindow}
implementation on the Windows platform, which utilizes the native platform's MonitorFromWindow(HWND) function.
All OpenGL resources shall be regenerated, while the drawable's {@link GLCapabilities} has
to be chosen again. The following protocol shall be satisfied.
Avoiding breakage with older applications and because of the situation
mentioned above, the boolean system property jogl.screenchange.action will control the
screen change action as follows:
-Djogl.screenchange.action=false Disable the drawable reconfiguration (the default)
-Djogl.screenchange.action=true Enable the drawable reconfiguration
*/
public interface GLAutoDrawable extends GLDrawable {
/** Flag reflecting wheather the drawable reconfiguration will be issued in
* case a screen device change occured, e.g. in a multihead environment,
* where you drag the window to another monitor. */
public static final boolean SCREEN_CHANGE_ACTION_ENABLED = Debug.getBooleanProperty("jogl.screenchange.action", true);
/**
* If the implementation uses delegation, return the delegated {@link GLDrawable} instance,
* otherwise return this instance.
*/
public GLDrawable getDelegatedDrawable();
/**
* Returns the context associated with this drawable. The returned
* context will be synchronized.
* Don't rely on it's identity, the context may change.
*/
public GLContext getContext();
/**
* Associate a new context to this drawable and also propagates the context/drawable switch by
* calling {@link GLContext#setGLDrawable(GLDrawable, boolean) newCtx.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.
*
*
* @param newCtx the new context
* @return the replaced GLContext, maybe null
*
* @see GLContext#setGLDrawable(GLDrawable, boolean)
* @see GLContext#setGLReadDrawable(GLDrawable)
* @see jogamp.opengl.GLDrawableHelper#switchContext(GLDrawable, GLContext, GLContext, int)
*/
public GLContext setContext(GLContext newCtx);
/**
* Adds the given {@link GLEventListener listener} to the end of this drawable queue.
* The {@link GLEventListener listeners} are notified of events in the order of the queue.
* * The newly added listener's {@link GLEventListener#init(GLAutoDrawable) init(..)} * method will be called once before any other of it's callback methods. * See {@link #getGLEventListenerInitState(GLEventListener)} for details. *
* @param listener The GLEventListener object to be inserted */ public void addGLEventListener(GLEventListener listener); /** * Adds the given {@link GLEventListener listener} at the given index of this drawable queue. * The {@link GLEventListener listeners} are notified of events in the order of the queue. ** The newly added listener's {@link GLEventListener#init(GLAutoDrawable) init(..)} * method will be called once before any other of it's callback methods. * See {@link #getGLEventListenerInitState(GLEventListener)} for details. *
* @param index 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(). * @param listener The GLEventListener object to be inserted * @throws IndexOutOfBoundsException If the index is not within (0 <= index && index <= size()), or -1 */ public void addGLEventListener(int index, GLEventListener listener) throws IndexOutOfBoundsException; /** * Returns the number of {@link GLEventListener} of this drawable queue. * @return The number of GLEventListener objects of this drawable queue. */ public int getGLEventListenerCount(); /** * Returns the {@link GLEventListener} at the given index of this drawable queue. * @param index 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. * @return The GLEventListener object at the given index. * @throws IndexOutOfBoundsException If the index is not within (0 <= index && index < size()), or -1 */ public GLEventListener getGLEventListener(int index) throws IndexOutOfBoundsException; /** * Retrieves whether the given {@link GLEventListener listener} is initialized or not. ** After {@link #addGLEventListener(GLEventListener) adding} a {@link GLEventListener} it is * marked uninitialized and added to a list of to be initialized {@link GLEventListener}. * If such uninitialized {@link GLEventListener}'s handler methods (reshape, display) * are about to be invoked, it's {@link GLEventListener#init(GLAutoDrawable) init(..)} method is invoked first. * Afterwards the {@link GLEventListener} is marked initialized * and removed from the list of to be initialized {@link GLEventListener}. *
*
* This methods returns the {@link GLEventListener} initialized state,
* i.e. returns false if it is included in the list of to be initialized {@link GLEventListener},
* otherwise true.
*
* This methods allows manually setting the {@link GLEventListener} initialized state, * i.e. adding it to, or removing it from the list of to be initialized {@link GLEventListener}. * See {@link #getGLEventListenerInitState(GLEventListener)} for details. *
** Warning: This method does not validate whether the given {@link GLEventListener listener's} * is member of this drawable queue, i.e. {@link #addGLEventListener(GLEventListener) added}. *
** This method is only exposed to allow users full control over the {@link GLEventListener}'s state * and is usually not recommended to change. *
** One use case is moving a {@link GLContext} and their initialized {@link GLEventListener} * from one {@link GLAutoDrawable} to another, * where a subsequent {@link GLEventListener#init(GLAutoDrawable) init(..)} call after adding it * to the new owner is neither required nor desired. * See {@link com.jogamp.opengl.util.GLDrawableUtil#swapGLContextAndAllGLEventListener(GLAutoDrawable, GLAutoDrawable) swapGLContextAndAllGLEventListener(..)}. *
* @param listener the GLEventListener object to perform a state change. * @param initialized iftrue, mark the listener initialized, otherwise uninitialized.
*/
public void setGLEventListenerInitState(GLEventListener listener, boolean initialized);
/**
* Disposes the given {@link GLEventListener listener} via {@link GLEventListener#dispose(GLAutoDrawable) dispose(..)}
* if it has been initialized and added to this queue.
*
* If remove is true, the {@link GLEventListener} is removed from this drawable queue before disposal,
* otherwise marked uninitialized.
*
* If an {@link GLAnimatorControl} is being attached and the current thread is different * than {@link GLAnimatorControl#getThread() the animator's thread}, it is paused during the operation. *
** Note that this is an expensive operation, since {@link GLEventListener#dispose(GLAutoDrawable) dispose(..)} * is decorated by {@link GLContext#makeCurrent()} and {@link GLContext#release()}. *
** Use {@link #removeGLEventListener(GLEventListener) removeGLEventListener(listener)} instead * if you just want to remove the {@link GLEventListener 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 * {@link GLEventListener} handler (reshape, display, etc.), that it is not * guaranteed that all other listeners will be evaluated properly * during this update cycle. *
* @param listener The GLEventListener object to be disposed and removed ifremove is true
* @param remove pass true to have the listener removed from this drawable queue, otherwise pass false
* @return the disposed and/or removed GLEventListener, or null if no action was performed, i.e. listener was not added
*/
public GLEventListener disposeGLEventListener(GLEventListener listener, boolean remove);
/**
* Removes the given {@link GLEventListener listener} from this drawable queue.
* * This is an inexpensive operation, since the removed listener's * {@link GLEventListener#dispose(GLAutoDrawable) dispose(..)} method will not be called. *
** Use {@link #disposeGLEventListener(GLEventListener, boolean) disposeGLEventListener(listener, true)} * instead to ensure disposal of the {@link GLEventListener listener}'s (OpenGL) resources. *
** Note that if this is done from within a particular drawable's * {@link GLEventListener} handler (reshape, display, etc.), that it is not * guaranteed that all other listeners will be evaluated properly * during this update cycle. *
* @param listener The GLEventListener object to be removed * @return the removed GLEventListener, or null if listener was not added */ public GLEventListener removeGLEventListener(GLEventListener listener); /** * Registers the usage of an animator, an {@link javax.media.opengl.GLAnimatorControl} implementation. * The animator will be queried whether it's animating, ie periodically issuing {@link #display()} calls or not. *
* This method shall be called by an animator implementation only,
* e.g. {@link com.jogamp.opengl.util.Animator#add(javax.media.opengl.GLAutoDrawable)}, passing it's control implementation,
* and {@link com.jogamp.opengl.util.Animator#remove(javax.media.opengl.GLAutoDrawable)}, passing null.
*
* Impacts {@link #display()} and {@link #invoke(boolean, GLRunnable)} semantics.
null reference indicates no animator is using
* this GLAutoDrawable,GLAutoDrawable.
*
* @throws GLException if an animator is already registered.
* @see #display()
* @see #invoke(boolean, GLRunnable)
* @see javax.media.opengl.GLAnimatorControl
*/
public abstract void setAnimator(GLAnimatorControl animatorControl) throws GLException;
/**
* @return the registered {@link javax.media.opengl.GLAnimatorControl} implementation, using this GLAutoDrawable.
*
* @see #setAnimator(javax.media.opengl.GLAnimatorControl)
* @see javax.media.opengl.GLAnimatorControl
*/
public GLAnimatorControl getAnimator();
/**
* Dedicates this instance's {@link GLContext} to the given thread.setExclusiveContextThread(null) has been called.
*
* Default non-exclusive behavior is requested via setExclusiveContextThread(null),
* which will cause the next call of {@link #display()} on the exclusive thread to
* release the {@link GLContext}. Only after it's async release, {@link #getExclusiveContextThread()}
* will return null.
*
* To release a previous made exclusive thread, a user issues setExclusiveContextThread(null)
* and may poll {@link #getExclusiveContextThread()} until it returns null,
* while the exclusive thread is still running.
*
* Note: Setting a new exclusive thread without properly releasing a previous one * will throw an GLException. *
** Note: Utilizing this feature w/ AWT could lead to an AWT-EDT deadlock, depending on the AWT implementation. * Hence it is advised not to use it with native AWT GLAutoDrawable like GLCanvas. *
** One scenario could be to dedicate the context to the {@link GLAnimatorControl#getThread() animator thread} * and spare redundant context switches, see {@link com.jogamp.opengl.util.AnimatorBase#setExclusiveContext(boolean)}. *
* @param t the exclusive thread to claim the context, ornull for default operation.
* @return previous exclusive context thread
* @throws GLException If an exclusive thread is still active but a new one is attempted to be set
* @see com.jogamp.opengl.util.AnimatorBase#setExclusiveContext(boolean)
*/
public Thread setExclusiveContextThread(Thread t) throws GLException;
/**
* @see #setExclusiveContextThread(Thread)
*/
public Thread getExclusiveContextThread();
/**
* Enqueues a one-shot {@link GLRunnable},
* which will be executed within the next {@link #display()} call
* after all registered {@link GLEventListener}s
* {@link GLEventListener#display(GLAutoDrawable) display(GLAutoDrawable)}
* methods has been called.
*
* If no {@link GLAnimatorControl} is animating (default),
* or if the current thread is the animator thread,
* a {@link #display()} call is issued after enqueue the GLRunnable,
* hence the {@link GLRunnable} will be executed right away.
*
* If an {@link GLAnimatorControl animator} is running,
* no explicit {@link #display()} call is issued, allowing the {@link GLAnimatorControl animator} to perform it when it's due.
*
* If wait is true the call blocks until the glRunnable
* has been executed by the {@link GLAnimatorControl animator}, otherwise the method returns immediately.
*
* If wait is true and
* {@link #isRealized()} returns false or {@link #getContext()} returns null,
* the call is ignored and returns false.
* This helps avoiding deadlocking the caller.
*
* The internal queue of {@link GLRunnable}'s is being flushed with {@link #destroy()} * where all blocked callers are being notified. *
* * @param wait iftrue block until execution of glRunnable is finished, otherwise return immediately w/o waiting
* @param glRunnable the {@link GLRunnable} to execute within {@link #display()}
* @return true if the {@link GLRunnable} has been processed or queued, otherwise false.
*
* @see #setAnimator(GLAnimatorControl)
* @see #display()
* @see GLRunnable
* @see #enqueue(GLRunnable)
*/
public boolean invoke(boolean wait, GLRunnable glRunnable);
/**
* Extends {@link #invoke(boolean, GLRunnable)} functionality
* allowing to inject a list of {@link GLRunnable}s.
* @param wait if true block until execution of the last glRunnable is finished, otherwise return immediately w/o waiting
* @param glRunnables the {@link GLRunnable}s to execute within {@link #display()}
* @return true if the {@link GLRunnable}s has been processed or queued, otherwise false.
*/
public boolean invoke(boolean wait, List* Causes OpenGL rendering to be performed for this GLAutoDrawable * in the following order: *
* May be called periodically by a running {@link javax.media.opengl.GLAnimatorControl} implementation,
* which must register itself with {@link #setAnimator(javax.media.opengl.GLAnimatorControl)}.
* Called automatically by the window system toolkit upon receiving a repaint() request,
* except an {@link javax.media.opengl.GLAnimatorControl} implementation {@link javax.media.opengl.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 {@link GLEventListener#display * display(..)} callback.
** In case of a new generated OpenGL context, * the implementation shall call {@link GLEventListener#init init(..)} for all * registered {@link GLEventListener}s before making the * actual {@link GLEventListener#display display(..)} calls, * in case this has not been done yet.
* * @see #setAnimator(javax.media.opengl.GLAnimatorControl) */ public void display(); /** Enables or disables automatic buffer swapping for this drawable. By default this property is set to true; when true, after all GLEventListeners have been called for a display() event, the front and back buffers are swapped, displaying the results of the render. When disabled, the user is responsible for calling {@link #swapBuffers(..)} manually. */ public void setAutoSwapBufferMode(boolean enable); /** Indicates whether automatic buffer swapping is enabled for this drawable. See {@link #setAutoSwapBufferMode}. */ public boolean getAutoSwapBufferMode(); /** * @param flags Additional context creation flags. * * @see GLContext#setContextCreationFlags(int) * @see GLContext#enableGLDebugMessage(boolean) */ public void setContextCreationFlags(int flags); /** * @return Additional context creation flags */ public int getContextCreationFlags(); /** * {@inheritDoc} ** 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 {@link #setContext(GLContext)}. *
** The GLAutoDrawable implementation shall also set the * context creation flags as customized w/ {@link #setContextCreationFlags(int)}. *
*/ @Override public GLContext createContext(GLContext shareWith); /** Returns the {@link GL} pipeline object this GLAutoDrawable uses. If this method is called outside of the {@link 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. */ public GL getGL(); /** Sets the {@link GL} 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. @return the set GL pipeline or null if not successful */ public GL setGL(GL gl); /** * Method may return the upstream UI toolkit object * holding this {@link GLAutoDrawable} instance, if exist. ** Currently known Java UI toolkits and it's known return types are: * *
| Toolkit | GLAutoDrawable Implementation | ~ | Return Type of getUpstreamWidget() * |
| NEWT | {@link com.jogamp.newt.opengl.GLWindow} | has a | {@link com.jogamp.newt.Window} * |
| SWT | {@link com.jogamp.opengl.swt.GLCanvas} | is a | {@link org.eclipse.swt.widgets.Canvas} * |
| AWT | {@link javax.media.opengl.awt.GLCanvas} | is a | {@link java.awt.Canvas} * |
| AWT | {@link javax.media.opengl.awt.GLJPanel} | is a | {@link javax.swing.JPanel} * |
* This method may also return null if no UI toolkit is being used,
* as common for offscreen rendering.
*