Merge "Skip redrawing the bars if the surface aspect ratio matches" into qt-dev (f83de3a5) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/wm/TaskSnapshotSurface.java

+21 −9

Original line number	Diff line number	Diff line
		@@ -317,6 +317,11 @@ class TaskSnapshotSurface implements StartingSurface {
		throw new IllegalStateException("mSurface does not hold a valid surface.");
		}
		final SurfaceSession session = new SurfaceSession();
		// We consider nearly matched dimensions as there can be rounding errors and the user won't
		// notice very minute differences from scaling one dimension more than the other
		final boolean aspectRatioMismatch = Math.abs(
		((float) buffer.getWidth() / buffer.getHeight())
		- ((float) mFrame.width() / mFrame.height())) > 0.01f;

		// Keep a reference to it such that it doesn't get destroyed when finalized.
		mChildSurfaceControl = new SurfaceControl.Builder(session)
		@@ -328,16 +333,21 @@ class TaskSnapshotSurface implements StartingSurface {
		Surface surface = new Surface();
		surface.copyFrom(mChildSurfaceControl);

		// Clip off ugly navigation bar.
		final Rect crop = calculateSnapshotCrop();
		final Rect frame = calculateSnapshotFrame(crop);
		final Rect frame;
		SurfaceControl.openTransaction();
		try {
		// We can just show the surface here as it will still be hidden as the parent is
		// still hidden.
		mChildSurfaceControl.show();
		if (aspectRatioMismatch) {
		// Clip off ugly navigation bar.
		final Rect crop = calculateSnapshotCrop();
		frame = calculateSnapshotFrame(crop);
		mChildSurfaceControl.setWindowCrop(crop);
		mChildSurfaceControl.setPosition(frame.left, frame.top);
		} else {
		frame = null;
		}

		// Scale the mismatch dimensions to fill the task bounds
		final float scale = 1 / mSnapshot.getScale();
		@@ -348,11 +358,13 @@ class TaskSnapshotSurface implements StartingSurface {
		surface.attachAndQueueBuffer(buffer);
		surface.release();

		if (aspectRatioMismatch) {
		final Canvas c = mSurface.lockCanvas(null);
		drawBackgroundAndBars(c, frame);
		mSurface.unlockCanvasAndPost(c);
		mSurface.release();
		}
		}

		/**
		* Calculates the snapshot crop in snapshot coordinate space.