Add a re-parent function to re-parent a specific child.

This is similar to reparentChildren, but the reparentChild will
only re-parent a specific child to the new parent and not all
children.

Test: Added test in Transaction_test for reparentChild.

Change-Id: I4275e0d5f1d5601b489956753c78a56d1a5d4c1c

1 files changed, 4 insertions, 0 deletions

diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index 9b06e63610..573f6856d6 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -45,6 +45,8 @@ status_t layer_state_t::write(Parcel& output) const
     output.writeInt32(overrideScalingMode);
     output.writeStrongBinder(IInterface::asBinder(barrierGbp));
     output.writeStrongBinder(relativeLayerHandle);
+    output.writeStrongBinder(parentHandleForChild);
+    output.writeStrongBinder(childHandle);
     output.write(transparentRegion);
     return NO_ERROR;
 }
@@ -77,6 +79,8 @@ status_t layer_state_t::read(const Parcel& input)
     barrierGbp =
         interface_cast<IGraphicBufferProducer>(input.readStrongBinder());
     relativeLayerHandle = input.readStrongBinder();
+    parentHandleForChild = input.readStrongBinder();
+    childHandle = input.readStrongBinder();
     input.read(transparentRegion);
     return NO_ERROR;
 }