SurfaceFlinger: Add parent-less relative layering.
This is a temporary functionality for the intermediate state where not
all child-surface like things in WM land are ported to use Child
Surfaces. In particular, we have ported SurfaceView to use child
surfaces and relative Z ordering. However the TV frameworks provide a
View framework component which overlays views over the SurfaceView but
below the main application window. Since we have not ported View
framework surfaces to use child layers, there is nothing the WM or
View Framework can do about this situation. Luckily the WM API's to
have requested this are @hide but we have the one media framework
component using it. In order to solve this issue we provide a method
to set Z ordering relative to another window without inheriting
its coordinate space as a child window would. This way the WM can
recognize these TYPE_APPLICATION_MEDIA_OVERLAY windows and Z-order
them at -1 with respect to the parents (and the SurfaceView can be at
-2).
Test: Included in transaction tests. Also manual test of bug repro steps with accomp frameworks/base CL
Bug: 36693738
Change-Id: I921852d3d34f67f79ec745b9703f9e679867e7a1
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index e21be8b..a5224ec 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -151,6 +151,12 @@
uint32_t appId;
uint32_t type;
+
+ // If non-null, a Surface this Surface's Z-order is interpreted relative to.
+ wp<Layer> zOrderRelativeOf;
+
+ // A list of surfaces whose Z-order is interpreted relative to ours.
+ SortedVector<wp<Layer>> zOrderRelatives;
};
// -----------------------------------------------------------------------
@@ -173,6 +179,8 @@
bool setFinalCrop(const Rect& crop, bool immediate);
bool setLayer(int32_t z);
+ bool setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t relativeZ);
+
bool setSize(uint32_t w, uint32_t h);
#ifdef USE_HWC2
bool setAlpha(float alpha);
@@ -549,6 +557,10 @@
void setParent(const sp<Layer>& layer);
+ LayerVector makeTraversalList();
+ void addZOrderRelative(const wp<Layer>& relative);
+ void removeZOrderRelative(const wp<Layer>& relative);
+
// -----------------------------------------------------------------------
class SyncPoint