Bug 1828570 - Clear mCurrentTextureHost in...

Bug 1828570 - Clear mCurrentTextureHost in WebRenderImageHost::UseTextureHost() when mCurrentTextureHost wraps remote texture r=gfx-reviewers,lsalzman

The problem occurred when the remote texture fell back to the normal TextureHost.

mCurrentTextureHost have to be cleared in WebRenderImageHost::UseTextureHost() when mCurrentTextureHost wraps remote texture. When WebRenderImageHost::UseTextureHost() is called mCurrentTextureHost is chosen in WebRenderImageHost::GetAsTextureHostForComposite(). In the GetAsTextureHostForComposite(), mCurrentTextureHost should not wrap remote texture.

Differential Revision: https://phabricator.services.mozilla.com/D175838

gfx/layers/wr/WebRenderImageHost.cpp

@@ -63,6 +63,11 @@ void WebRenderImageHost::UseTextureHost(
     mPendingRemoteTextureWrappers.clear();
   }
 
+  if (mCurrentTextureHost &&
+      mCurrentTextureHost->AsRemoteTextureHostWrapper()) {
+    mCurrentTextureHost = nullptr;
+  }
+
   nsTArray<TimedImage> newImages;
 
   for (uint32_t i = 0; i < aTextures.Length(); ++i) {