From f16336a10d36f18eb55efb1d62c7205de9e916c4 Mon Sep 17 00:00:00 2001
From: sotaro <sotaro.ikeda.g@gmail.com>
Date: Feb 15 2020 12:20:18 +0000
Subject: [Layers] Clear WrappingTextureSourceYCbCrBasic::mTexture correctly


---

diff --git a/gfx/layers/composite/TextureHost.cpp b/gfx/layers/composite/TextureHost.cpp
index b342f1d..8df7af4 100644
--- a/gfx/layers/composite/TextureHost.cpp
+++ b/gfx/layers/composite/TextureHost.cpp
@@ -555,6 +555,14 @@ void
 BufferTextureHost::DeallocateDeviceData()
 {
   if (mFirstSource && mFirstSource->NumCompositableRefs() > 0) {
+    // WrappingTextureSourceYCbCrBasic wraps YUV format BufferTextureHost.
+    // When BufferTextureHost is destroyed, data of
+    // WrappingTextureSourceYCbCrBasic becomes invalid.
+    if (mFirstSource->AsWrappingTextureSourceYCbCrBasic() &&
+        mFirstSource->IsOwnedBy(this)) {
+      mFirstSource->SetOwner(nullptr);
+      mFirstSource->DeallocateDeviceData();
+    }
     return;
   }