Merge "Reparent surface control for Webview overlay" into sc-dev am: 4d7a36be41

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15106351

Change-Id: I3a097b69f97d18cdae6a66b899a391d7f4d6a3d5

libs/hwui/WebViewFunctorManager.cpp

@@ -126,7 +126,14 @@ void WebViewFunctor::drawGl(const DrawGlInfo& drawInfo) {
                 renderthread::CanvasContext::getActiveContext();
         if (activeContext != nullptr) {
             ASurfaceControl* rootSurfaceControl = activeContext->getSurfaceControl();
-            if (rootSurfaceControl) overlayParams.overlaysMode = OverlaysMode::Enabled;
+            if (rootSurfaceControl) {
+                overlayParams.overlaysMode = OverlaysMode::Enabled;
+                int32_t rgid = activeContext->getSurfaceControlGenerationId();
+                if (mParentSurfaceControlGenerationId != rgid) {
+                    reparentSurfaceControl(rootSurfaceControl);
+                    mParentSurfaceControlGenerationId = rgid;
+                }
+            }
         }
     }
 
@@ -195,6 +202,7 @@ ASurfaceControl* WebViewFunctor::getSurfaceControl() {
     LOG_ALWAYS_FATAL_IF(rootSurfaceControl == nullptr, "Null root surface control!");
 
     auto funcs = renderthread::RenderThread::getInstance().getASurfaceControlFunctions();
+    mParentSurfaceControlGenerationId = activeContext->getSurfaceControlGenerationId();
     mSurfaceControl = funcs.createFunc(rootSurfaceControl, "Webview Overlay SurfaceControl");
     ASurfaceTransaction* transaction = funcs.transactionCreateFunc();
     activeContext->prepareSurfaceControlForWebview();
@@ -218,6 +226,17 @@ void WebViewFunctor::mergeTransaction(ASurfaceTransaction* transaction) {
     }
 }
 
+void WebViewFunctor::reparentSurfaceControl(ASurfaceControl* parent) {
+    ATRACE_NAME("WebViewFunctor::reparentSurfaceControl");
+    if (mSurfaceControl == nullptr) return;
+
+    auto funcs = renderthread::RenderThread::getInstance().getASurfaceControlFunctions();
+    ASurfaceTransaction* transaction = funcs.transactionCreateFunc();
+    funcs.transactionReparentFunc(transaction, mSurfaceControl, parent);
+    mergeTransaction(transaction);
+    funcs.transactionDeleteFunc(transaction);
+}
+
 WebViewFunctorManager& WebViewFunctorManager::instance() {
     static WebViewFunctorManager sInstance;
     return sInstance;

libs/hwui/WebViewFunctorManager.h

@@ -84,6 +84,9 @@ public:
         return sp<Handle>{new Handle(*this)};
     }
 
+private:
+    void reparentSurfaceControl(ASurfaceControl* parent);
+
 private:
     WebViewFunctorCallbacks mCallbacks;
     void* const mData;
@@ -91,6 +94,7 @@ private:
     RenderMode mMode;
     bool mHasContext = false;
     bool mCreatedHandle = false;
+    int32_t mParentSurfaceControlGenerationId = 0;
     ASurfaceControl* mSurfaceControl = nullptr;
 };
 

libs/hwui/renderthread/CanvasContext.cpp

@@ -201,6 +201,7 @@ void CanvasContext::setSurfaceControl(ASurfaceControl* surfaceControl) {
         funcs.releaseFunc(mSurfaceControl);
     }
     mSurfaceControl = surfaceControl;
+    mSurfaceControlGenerationId++;
     mExpectSurfaceStats = surfaceControl != nullptr;
     if (mSurfaceControl != nullptr) {
         funcs.acquireFunc(mSurfaceControl);

libs/hwui/renderthread/CanvasContext.h

@@ -110,6 +110,7 @@ public:
     GrDirectContext* getGrContext() const { return mRenderThread.getGrContext(); }
 
     ASurfaceControl* getSurfaceControl() const { return mSurfaceControl; }
+    int32_t getSurfaceControlGenerationId() const { return mSurfaceControlGenerationId; }
 
     // Won't take effect until next EGLSurface creation
     void setSwapBehavior(SwapBehavior swapBehavior);
@@ -253,6 +254,9 @@ private:
     // The SurfaceControl reference is passed from ViewRootImpl, can be set to
     // NULL to remove the reference
     ASurfaceControl* mSurfaceControl = nullptr;
+    // id to track surface control changes and WebViewFunctor uses it to determine
+    // whether reparenting is needed
+    int32_t mSurfaceControlGenerationId = 0;
     // stopped indicates the CanvasContext will reject actual redraw operations,
     // and defer repaint until it is un-stopped
     bool mStopped = false;

libs/hwui/renderthread/RenderThread.cpp

@@ -98,6 +98,10 @@ ASurfaceControlFunctions::ASurfaceControlFunctions() {
     LOG_ALWAYS_FATAL_IF(transactionApplyFunc == nullptr,
                         "Failed to find required symbol ASurfaceTransaction_apply!");
 
+    transactionReparentFunc = (AST_reparent)dlsym(handle_, "ASurfaceTransaction_reparent");
+    LOG_ALWAYS_FATAL_IF(transactionReparentFunc == nullptr,
+                        "Failed to find required symbol transactionReparentFunc!");
+
     transactionSetVisibilityFunc =
             (AST_setVisibility)dlsym(handle_, "ASurfaceTransaction_setVisibility");
     LOG_ALWAYS_FATAL_IF(transactionSetVisibilityFunc == nullptr,

libs/hwui/renderthread/RenderThread.h

@@ -94,6 +94,9 @@ 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_reparent)(ASurfaceTransaction* aSurfaceTransaction,
+                             ASurfaceControl* aSurfaceControl,
+                             ASurfaceControl* newParentASurfaceControl);
 typedef void (*AST_setVisibility)(ASurfaceTransaction* transaction,
                                   ASurfaceControl* surface_control, int8_t visibility);
 typedef void (*AST_setZOrder)(ASurfaceTransaction* transaction, ASurfaceControl* surface_control,
@@ -113,6 +116,7 @@ struct ASurfaceControlFunctions {
     AST_create transactionCreateFunc;
     AST_delete transactionDeleteFunc;
     AST_apply transactionApplyFunc;
+    AST_reparent transactionReparentFunc;
     AST_setVisibility transactionSetVisibilityFunc;
     AST_setZOrder transactionSetZOrderFunc;
 };