commit ae0608381b2b4699218febd6d45ad9d307544d55
author Robert Carr <racarr@google.com> Mon Nov 28 10:51:00 2016 -0800
committer Robert Carr <racarr@google.com> Tue Jan 24 10:57:40 2017 -0800
tree 9cf2ccc9fb45be608329b963b3f960f506c882cd
parent 6cf6af0299f7e48bc5bcdcd6a6c0f5a8725e9411

SurfaceFlinger and libgui: Switch Z-order to signed type.

In preparation for SurfaceFlinger child layers. In that model
children's Z order will be relative to their parent. We need
negative Z values to represent children stacking below their
parent (e.g. SurfaceView). Java side already uses signed types
strangely enough.

Test: Basically a refactoring. SurfaceFlinger still works.
Change-Id: Ifcece69f6f9d917cbf5238a59f8e5de1e8ba6a25

include/private/gui/LayerState.h

diff --git a/include/private/gui/LayerState.h b/include/private/gui/LayerState.h
index b648751..b3481d6 100644
--- a/include/private/gui/LayerState.h
+++ b/include/private/gui/LayerState.h
@@ -84,7 +84,7 @@
             uint32_t        what;
             float           x;
             float           y;
-            uint32_t        z;
+            int32_t         z;
             uint32_t        w;
             uint32_t        h;
             uint32_t        layerStack;