Webview overlay support

The basic idea is to create a child surface control from the root surface control passed from ViewRootImpl to the render thread.

Transactions are sent back to the java layer to get merged.

In case of offscreen layers, SurfaceControl must be disabled.

This new feature is disabled for Vulkan at the moment, a new CL will be used to enable the support.

Bug: 173671170
Test: manual, webview apks
Change-Id: I119405d13eca3c59fd3ec78e50dc7739f78411d4

1 files changed, 15 insertions, 1 deletions

diff --git a/libs/hwui/renderthread/RenderThread.h b/libs/hwui/renderthread/RenderThread.h
index 9e5bce76e228..cd9b923f4b3a 100644
--- a/libs/hwui/renderthread/RenderThread.h
+++ b/libs/hwui/renderthread/RenderThread.h
@@ -79,25 +79,39 @@ struct VsyncSource {
     virtual ~VsyncSource() {}
 };
 
+typedef ASurfaceControl* (*ASC_create)(ASurfaceControl* parent, const char* debug_name);
 typedef void (*ASC_acquire)(ASurfaceControl* control);
 typedef void (*ASC_release)(ASurfaceControl* control);
 
 typedef void (*ASC_registerSurfaceStatsListener)(ASurfaceControl* control, void* context,
         ASurfaceControl_SurfaceStatsListener func);
 typedef void (*ASC_unregisterSurfaceStatsListener)(void* context,
-                                       ASurfaceControl_SurfaceStatsListener func);
+                                                   ASurfaceControl_SurfaceStatsListener func);
 
 typedef int64_t (*ASCStats_getAcquireTime)(ASurfaceControlStats* stats);
 typedef uint64_t (*ASCStats_getFrameNumber)(ASurfaceControlStats* stats);
 
+typedef ASurfaceTransaction* (*AST_create)();
+typedef void (*AST_delete)(ASurfaceTransaction* transaction);
+typedef void (*AST_apply)(ASurfaceTransaction* transaction);
+typedef void (*AST_setVisibility)(ASurfaceTransaction* transaction,
+                                  ASurfaceControl* surface_control, int8_t visibility);
+
 struct ASurfaceControlFunctions {
     ASurfaceControlFunctions();
+
+    ASC_create createFunc;
     ASC_acquire acquireFunc;
     ASC_release releaseFunc;
     ASC_registerSurfaceStatsListener registerListenerFunc;
     ASC_unregisterSurfaceStatsListener unregisterListenerFunc;
     ASCStats_getAcquireTime getAcquireTimeFunc;
     ASCStats_getFrameNumber getFrameNumberFunc;
+
+    AST_create transactionCreateFunc;
+    AST_delete transactionDeleteFunc;
+    AST_apply transactionApplyFunc;
+    AST_setVisibility transactionSetVisibilityFunc;
 };
 
 class ChoreographerSource;