/*
* This private method should only be called inside a synchronized(sGLThreadManager) block.
*/
private void stopEglLocked() {
if (mHaveEgl) {
mHaveEgl = false;
mEglHelper.destroySurface();
sGLThreadManager.releaseEglSurface(this);
}
}
private void guardedRun() throws InterruptedException {
mEglHelper =
new EglHelper(mEGLConfigChooser, mEGLContextFactory, mEGLWindowSurfaceFactory, mGLWrapper);
try {
GL10 gl = null;
boolean tellRendererSurfaceCreated = true;
boolean tellRendererSurfaceChanged = true;
/*
* This is our main activity thread's loop, we go until asked to quit.
*/
while (!isDone()) {
/*
* Update the asynchronous state (window size)
*/
int w = 0;
int h = 0;
boolean changed = false;
boolean needStart = false;
boolean eventsWaiting = false;
synchronized (sGLThreadManager) {
while (true) {
// Manage acquiring and releasing the SurfaceView
// surface and the EGL surface.
if (mPaused) {
stopEglLocked();
}
if (!mHasSurface) {
if (!mWaitingForSurface) {
stopEglLocked();
mWaitingForSurface = true;
sGLThreadManager.notifyAll();
}
} else {
if (!mHaveEgl) {
if (sGLThreadManager.tryAcquireEglSurface(this)) {
mHaveEgl = true;
mEglHelper.start();
mRequestRender = true;
needStart = true;
}
}
}
// Check if we need to wait. If not, update any state
// that needs to be updated, copy any state that
// needs to be copied, and use "break" to exit the
// wait loop.
if (mDone) {
return;
}
if (mEventsWaiting) {
eventsWaiting = true;
mEventsWaiting = false;
break;
}
if ((!mPaused)
&& mHasSurface
&& mHaveEgl
&& (mWidth > 0)
&& (mHeight > 0)
&& (mRequestRender
|| (mRenderMode == GLWallpaperService.GLEngine.RENDERMODE_CONTINUOUSLY))) {
changed = mSizeChanged;
w = mWidth;
h = mHeight;
mSizeChanged = false;
mRequestRender = false;
if (mHasSurface && mWaitingForSurface) {
changed = true;
mWaitingForSurface = false;
sGLThreadManager.notifyAll();
}
break;
}
// By design, this is the only place where we wait().
if (LOG_THREADS) {
Log.i("GLThread", "waiting tid=" + getId());
}
sGLThreadManager.wait();
}
} // end of synchronized(sGLThreadManager)
/*
* Handle queued events
*/
if (eventsWaiting) {
Runnable r;
while ((r = getEvent()) != null) {
r.run();
if (isDone()) {
return;
}
}
// Go back and see if we need to wait to render.
continue;
}
if (needStart) {
tellRendererSurfaceCreated = true;
changed = true;
}
if (changed) {
gl = (GL10) mEglHelper.createSurface(mHolder);
tellRendererSurfaceChanged = true;
}
if (tellRendererSurfaceCreated) {
mRenderer.onSurfaceCreated(gl, mEglHelper.mEglConfig);
tellRendererSurfaceCreated = false;
}
if (tellRendererSurfaceChanged) {
mRenderer.onSurfaceChanged(gl, w, h);
tellRendererSurfaceChanged = false;
}
if ((w > 0) && (h > 0)) {
/* draw a frame here */
mRenderer.onDrawFrame(gl);
/*
* Once we're done with GL, we need to call swapBuffers() to instruct the system to display the
* rendered frame
*/
mEglHelper.swap();
Thread.sleep(10);
}
}
} finally {
/*
* clean-up everything...
*/
synchronized (sGLThreadManager) {
stopEglLocked();
mEglHelper.finish();
}
}
}