SurfaceControl: Add getTransformToDisplayInverse

For seamless rotation, the window manager needs
access to this flag, as it will apply the inverse
display transform itself to all other windows.

Bug: 28823590
Change-Id: Ifeee1078a9cb4cd01c8052570c137c6228b2f13d
diff --git a/services/surfaceflinger/Client.cpp b/services/surfaceflinger/Client.cpp
index 2a025b8..415bdca 100644
--- a/services/surfaceflinger/Client.cpp
+++ b/services/surfaceflinger/Client.cpp
@@ -173,5 +173,15 @@
     return NO_ERROR;
 }
 
+status_t Client::getTransformToDisplayInverse(const sp<IBinder>& handle,
+        bool* outTransformToDisplayInverse) const {
+    sp<Layer> layer = getLayerUser(handle);
+    if (layer == NULL) {
+        return NAME_NOT_FOUND;
+    }
+    *outTransformToDisplayInverse = layer->getTransformToDisplayInverse();
+    return NO_ERROR;
+}
+
 // ---------------------------------------------------------------------------
 }; // namespace android