Bug 1461239 - Use InvalidateRenderedFrame() when necessary r=nical

gfx/layers/wr/AsyncImagePipelineManager.cpp

@@ -280,6 +280,8 @@ AsyncImagePipelineManager::UpdateImageKeys(const wr::Epoch& aEpoch,
   }
 
   if (aPipeline->mWrTextureWrapper) {
+    // Force frame rendering, since WebRenderTextureHost update its data outside of WebRender.
+    aMaybeFastTxn.InvalidateRenderedFrame();
     HoldExternalImage(aPipelineId, aEpoch, aPipeline->mWrTextureWrapper);
   }
 

gfx/layers/wr/WebRenderBridgeParent.cpp

@@ -1393,6 +1393,12 @@ WebRenderBridgeParent::RecvScheduleComposite()
   if (mDestroyed) {
     return IPC_OK();
   }
+
+  // Force frame rendering during next frame generation.
+  wr::TransactionBuilder fastTxn(/* aUseSceneBuilderThread */ false);
+  fastTxn.InvalidateRenderedFrame();
+  mApi->SendTransaction(fastTxn);
+
   ScheduleGenerateFrame();
   return IPC_OK();
 }

gfx/webrender_bindings/WebRenderAPI.cpp

@@ -208,6 +208,12 @@ TransactionBuilder::GenerateFrame()
   wr_transaction_generate_frame(mTxn);
 }
 
+void
+TransactionBuilder::InvalidateRenderedFrame()
+{
+  wr_transaction_invalidate_rendered_frame(mTxn);
+}
+
 void
 TransactionBuilder::UpdateDynamicProperties(const nsTArray<wr::WrOpacityProperty>& aOpacityArray,
                                      const nsTArray<wr::WrTransformProperty>& aTransformArray)

gfx/webrender_bindings/WebRenderAPI.h

@@ -89,6 +89,8 @@ public:
 
   void GenerateFrame();
 
+  void InvalidateRenderedFrame();
+
   void UpdateDynamicProperties(const nsTArray<wr::WrOpacityProperty>& aOpacityArray,
                                const nsTArray<wr::WrTransformProperty>& aTransformArray);
 

gfx/webrender_bindings/src/bindings.rs

@@ -1274,6 +1274,11 @@ pub extern "C" fn wr_transaction_generate_frame(txn: &mut Transaction) {
     txn.generate_frame();
 }
 
+#[no_mangle]
+pub extern "C" fn wr_transaction_invalidate_rendered_frame(txn: &mut Transaction) {
+    txn.invalidate_rendered_frame();
+}
+
 #[no_mangle]
 pub extern "C" fn wr_transaction_update_dynamic_properties(
     txn: &mut Transaction,

gfx/webrender_bindings/webrender_ffi_generated.h

@@ -1820,6 +1820,10 @@ WR_INLINE
 void wr_transaction_generate_frame(Transaction *aTxn)
 WR_FUNC;
 
+WR_INLINE
+void wr_transaction_invalidate_rendered_frame(Transaction *aTxn)
+WR_FUNC;
+
 WR_INLINE
 bool wr_transaction_is_empty(const Transaction *aTxn)
 WR_FUNC;