Copying ViewCapture from last frame when possible. (7308c390) · Commits · e / os / android_packages_apps_Trebuchet

quickstep/src/com/android/quickstep/util/ViewCapture.java

+118 −42

Original line number	Diff line number	Diff line
		@@ -67,6 +67,10 @@ public class ViewCapture {

		private static final String TAG = "ViewCapture";

		// These flags are copies of two private flags in the View class.
		private static final int PFLAG_INVALIDATED = 0x80000000;
		private static final int PFLAG_DIRTY_MASK = 0x00200000;

		// Number of frames to keep in memory
		private static final int MEMORY_SIZE = 2000;
		// Initial size of the reference pool. This is at least be 5 * total number of views in
		@@ -187,6 +191,7 @@ public class ViewCapture {
		private final ViewRef mViewRef = new ViewRef();

		private int mFrameIndexBg = -1;
		private boolean mIsFirstFrame = true;
		private final long[] mFrameTimesBg = new long[MEMORY_SIZE];
		private final ViewPropertyRef[] mNodesBg = new ViewPropertyRef[MEMORY_SIZE];

		@@ -205,6 +210,7 @@ public class ViewCapture {
		Message m = Message.obtain(mHandler);
		m.obj = mViewRef.next;
		mHandler.sendMessage(m);
		mIsFirstFrame = false;
		Trace.endSection();
		}

		@@ -214,9 +220,9 @@ public class ViewCapture {
		*/
		@WorkerThread
		private boolean captureViewPropertiesBg(Message msg) {
		ViewRef start = (ViewRef) msg.obj;
		ViewRef viewRefStart = (ViewRef) msg.obj;
		long time = msg.getWhen();
		if (start == null) {
		if (viewRefStart == null) {
		return false;
		}
		mFrameIndexBg++;
		@@ -227,12 +233,11 @@ public class ViewCapture {

		ViewPropertyRef recycle = mNodesBg[mFrameIndexBg];

		ViewPropertyRef result = null;
		ViewPropertyRef resultStart = null;
		ViewPropertyRef resultEnd = null;

		ViewRef current = start;
		ViewRef last = start;
		while (current != null) {
		ViewRef viewRefEnd = viewRefStart;
		while (viewRefEnd != null) {
		ViewPropertyRef propertyRef = recycle;
		if (propertyRef == null) {
		propertyRef = new ViewPropertyRef();
		@@ -241,24 +246,64 @@ public class ViewCapture {
		propertyRef.next = null;
		}

		propertyRef.transfer(current);
		last = current;
		current = current.next;
		ViewPropertyRef copy = null;
		if (viewRefEnd.childCount < 0) {
		copy = findInLastFrame(viewRefEnd.view.hashCode());
		viewRefEnd.childCount = (copy != null) ? copy.childCount : 0;
		}
		viewRefEnd.transferTo(propertyRef);

		if (resultStart == null) {
		resultStart = propertyRef;
		resultEnd = resultStart;
		} else {
		resultEnd.next = propertyRef;
		resultEnd = resultEnd.next;
		}

		if (copy != null) {
		int pending = copy.childCount;
		while (pending > 0) {
		copy = copy.next;
		pending = pending - 1 + copy.childCount;

		if (result == null) {
		result = propertyRef;
		resultEnd = result;
		propertyRef = recycle;
		if (propertyRef == null) {
		propertyRef = new ViewPropertyRef();
		} else {
		recycle = recycle.next;
		propertyRef.next = null;
		}

		copy.transferTo(propertyRef);

		resultEnd.next = propertyRef;
		resultEnd = propertyRef;
		resultEnd = resultEnd.next;
		}
		}

		if (viewRefEnd.next == null) {
		// The compiler will complain about using a non-final variable from
		// an outer class in a lambda if we pass in viewRefEnd directly.
		final ViewRef finalViewRefEnd = viewRefEnd;
		MAIN_EXECUTOR.execute(() -> addToPool(viewRefStart, finalViewRefEnd));
		break;
		}
		viewRefEnd = viewRefEnd.next;
		}
		mNodesBg[mFrameIndexBg] = result;
		ViewRef end = last;
		MAIN_EXECUTOR.execute(() -> addToPool(start, end));
		mNodesBg[mFrameIndexBg] = resultStart;
		return true;
		}

		private ViewPropertyRef findInLastFrame(int hashCode) {
		int lastFrameIndex = (mFrameIndexBg == 0) ? MEMORY_SIZE - 1 : mFrameIndexBg - 1;
		ViewPropertyRef viewPropertyRef = mNodesBg[lastFrameIndex];
		while (viewPropertyRef != null && viewPropertyRef.hashCode != hashCode) {
		viewPropertyRef = viewPropertyRef.next;
		}
		return viewPropertyRef;
		}

		void attachToRoot() {
		if (mRoot.isAttachedToWindow()) {
		mRoot.getViewTreeObserver().addOnDrawListener(this);
		@@ -314,8 +359,16 @@ public class ViewCapture {
		ref.view = view;
		start.next = ref;
		if (view instanceof ViewGroup) {
		ViewRef result = ref;
		ViewGroup parent = (ViewGroup) view;
		// If a view has not changed since the last frame, we will copy
		// its children from the last processed frame's data.
		if ((view.mPrivateFlags & (PFLAG_INVALIDATED \| PFLAG_DIRTY_MASK)) == 0
		&& !mIsFirstFrame) {
		// A negative child count is the signal to copy this view from the last frame.
		ref.childCount = -parent.getChildCount();
		return ref;
		}
		ViewRef result = ref;
		int childCount = ref.childCount = parent.getChildCount();
		for (int i = 0; i < childCount; i++) {
		result = captureViewTree(parent.getChildAt(i), result);
		@@ -349,31 +402,27 @@ public class ViewCapture {

		public ViewPropertyRef next;

		public void transfer(ViewRef viewRef) {
		childCount = viewRef.childCount;

		View view = viewRef.view;
		viewRef.view = null;

		clazz = view.getClass();
		hashCode = view.hashCode();
		id = view.getId();
		left = view.getLeft();
		top = view.getTop();
		right = view.getRight();
		bottom = view.getBottom();
		scrollX = view.getScrollX();
		scrollY = view.getScrollY();

		translateX = view.getTranslationX();
		translateY = view.getTranslationY();
		scaleX = view.getScaleX();
		scaleY = view.getScaleY();
		alpha = view.getAlpha();

		visibility = view.getVisibility();
		willNotDraw = view.willNotDraw();
		elevation = view.getElevation();
		public void transferTo(ViewPropertyRef out) {
		out.clazz = this.clazz;
		out.hashCode = this.hashCode;
		out.childCount = this.childCount;
		out.id = this.id;
		out.left = this.left;
		out.top = this.top;
		out.right = this.right;
		out.bottom = this.bottom;
		out.scrollX = this.scrollX;
		out.scrollY = this.scrollY;
		out.scaleX = this.scaleX;
		out.scaleY = this.scaleY;
		out.translateX = this.translateX;
		out.translateY = this.translateY;
		out.alpha = this.alpha;
		out.visibility = this.visibility;
		out.willNotDraw = this.willNotDraw;
		out.clipChildren = this.clipChildren;
		out.next = this.next;
		out.elevation = this.elevation;
		}

		/**
		@@ -420,6 +469,33 @@ public class ViewCapture {
		public View view;
		public int childCount = 0;
		public ViewRef next;

		public void transferTo(ViewPropertyRef out) {
		out.childCount = this.childCount;

		View view = this.view;
		this.view = null;

		out.clazz = view.getClass();
		out.hashCode = view.hashCode();
		out.id = view.getId();
		out.left = view.getLeft();
		out.top = view.getTop();
		out.right = view.getRight();
		out.bottom = view.getBottom();
		out.scrollX = view.getScrollX();
		out.scrollY = view.getScrollY();

		out.translateX = view.getTranslationX();
		out.translateY = view.getTranslationY();
		out.scaleX = view.getScaleX();
		out.scaleY = view.getScaleY();
		out.alpha = view.getAlpha();
		out.elevation = view.getElevation();

		out.visibility = view.getVisibility();
		out.willNotDraw = view.willNotDraw();
		}
		}

		private static final class ViewIdProvider {