JNIEXPORT void JNICALL
awt_Unlock(JNIEnv* env)
{
if (awtLockInited) {
AWT_FLUSH_UNLOCK();
}
}
/**
* This function invokes the native threadsafe flushing and unlocking
* mechanism (e.g. the AWT_FLUSH_UNLOCK() macro in the GLX case) to ensure
* the preceding OpenGL commands are completed before the surface is unlocked
* in a synchronized manner. See OGLSurfaceData.h for more information
* on the recognized constant values for the flushFlag parameter.
*/
void
OGLSD_UnlockImpl(JNIEnv *env, jint flushFlag)
{
J2dTraceLn1(J2D_TRACE_INFO, "in OGLSD_UnlockImpl (flush=%d)", flushFlag);
switch (flushFlag) {
case OGLSD_FLUSH_ON_JED:
// if we're on the JED thread, we can use the native Toolkit thread
// flushing mechanism, which will post an asynchronous event that will
// eventually flush the context that is current to this thread
needGLFlush = JNI_TRUE;
AWT_FLUSH_UNLOCK();
break;
case OGLSD_FLUSH_NOW:
// otherwise, we have no choice but to flush immediately (or else
// any rendering not invoked from the JED thread could be left
// unflushed)
j2d_glFlush();
// FALLTHROUGH
case OGLSD_NO_FLUSH:
default:
AWT_UNLOCK();
break;
}
}
/**
* This is the native dispose method that gets invoked when the Java-level
* thread associated with this context is about to go away. This method
* invokes the AWT_LOCK mechanism for thread safety, then destroys the
* OGLContext kept in thread-local storage.
*/
static void
GLXGC_DisposeOGLContext(JNIEnv *env, jlong pData)
{
OGLContext *oglc = (OGLContext *)jlong_to_ptr(pData);
J2dTraceLn(J2D_TRACE_INFO, "in GLXGC_DisposeOGLContext");
AWT_LOCK();
GLXGC_DestroyOGLContext(env, oglc);
AWT_FLUSH_UNLOCK();
}
/*
* Unlock the drawing surface of the target component for native rendering.
*/
JNIEXPORT void JNICALL awt_DrawingSurface_Unlock(JAWT_DrawingSurface* ds)
{
JNIEnv* env;
if (ds == NULL) {
#ifdef DEBUG
fprintf(stderr, "Drawing Surface is NULL\n");
#endif
return;
}
env = ds->env;
AWT_FLUSH_UNLOCK();
}
/*
* Lock the surface of the target component for native rendering.
* When finished drawing, the surface must be unlocked with
* Unlock(). This function returns a bitmask with one or more of the
* following values:
*
* JAWT_LOCK_ERROR - When an error has occurred and the surface could not
* be locked.
*
* JAWT_LOCK_CLIP_CHANGED - When the clip region has changed.
*
* JAWT_LOCK_BOUNDS_CHANGED - When the bounds of the surface have changed.
*
* JAWT_LOCK_SURFACE_CHANGED - When the surface itself has changed
*/
JNIEXPORT jint JNICALL awt_DrawingSurface_Lock(JAWT_DrawingSurface* ds)
{
JNIEnv* env;
jobject target, peer;
jclass componentClass;
jint drawState;
if (ds == NULL) {
#ifdef DEBUG
fprintf(stderr, "Drawing Surface is NULL\n");
#endif
return (jint)JAWT_LOCK_ERROR;
}
env = ds->env;
target = ds->target;
/* Make sure the target is a java.awt.Component */
componentClass = (*env)->FindClass(env, "java/awt/Component");
if (!(*env)->IsInstanceOf(env, target, componentClass)) {
#ifdef DEBUG
fprintf(stderr, "Target is not a component\n");
#endif
return (jint)JAWT_LOCK_ERROR;
}
if (!awtLockInited) {
return (jint)JAWT_LOCK_ERROR;
}
AWT_LOCK();
/* Get the peer of the target component */
peer = (*env)->GetObjectField(env, target, componentIDs.peer);
if (JNU_IsNull(env, peer)) {
#ifdef DEBUG
fprintf(stderr, "Component peer is NULL\n");
#endif
AWT_FLUSH_UNLOCK();
return (jint)JAWT_LOCK_ERROR;
}
#ifndef XAWT
drawState = (*env)->GetIntField(env, peer, mComponentPeerIDs.drawState);
(*env)->SetIntField(env, peer, mComponentPeerIDs.drawState, 0);
#else
drawState = (*env)->GetIntField(env, peer, drawStateID);
(*env)->SetIntField(env, peer, drawStateID, 0);
#endif
return drawState;
}