--- a/gfx/layers/d3d11/TextureD3D11.cpp
+++ b/gfx/layers/d3d11/TextureD3D11.cpp
@@ -181,17 +181,17 @@ TextureClientD3D11::GetAsDrawTarget()
     return mDrawTarget;
   }
 
   mDrawTarget = Factory::CreateDrawTargetForD3D10Texture(mTexture, mFormat);
   return mDrawTarget;
 }
 
 bool
-TextureClientD3D11::AllocateForSurface(gfx::IntSize aSize, TextureAllocationFlags)
+TextureClientD3D11::AllocateForSurface(gfx::IntSize aSize, TextureAllocationFlags aFlags)
 {
   mSize = aSize;
   ID3D10Device* device = gfxWindowsPlatform::GetPlatform()->GetD3D10Device();
 
   CD3D10_TEXTURE2D_DESC newDesc(SurfaceFormatToDXGIFormat(mFormat),
                                 aSize.width, aSize.height, 1, 1,
                                 D3D10_BIND_RENDER_TARGET | D3D10_BIND_SHADER_RESOURCE);
 
@@ -199,16 +199,24 @@ TextureClientD3D11::AllocateForSurface(g
 
   HRESULT hr = device->CreateTexture2D(&newDesc, nullptr, byRef(mTexture));
 
   if (FAILED(hr)) {
     LOGD3D11("Error creating texture for client!");
     return false;
   }
 
+  if (aFlags & ALLOC_CLEAR_BUFFER) {
+    DebugOnly<bool> locked = Lock(OPEN_WRITE_ONLY);
+    MOZ_ASSERT(locked);
+    RefPtr<DrawTarget> dt = GetAsDrawTarget();
+    dt->ClearRect(Rect(0, 0, GetSize().width, GetSize().height));
+    Unlock();
+  }
+
   return true;
 }
 
 bool
 TextureClientD3D11::ToSurfaceDescriptor(SurfaceDescriptor& aOutDescriptor)
 {
   if (!IsAllocated()) {
     return false;

--- a/gfx/layers/d3d9/TextureD3D9.cpp
+++ b/gfx/layers/d3d9/TextureD3D9.cpp
@@ -1346,16 +1346,24 @@ CairoTextureClientD3D9::AllocateForSurfa
 
   DeviceManagerD3D9* deviceManager = gfxWindowsPlatform::GetPlatform()->GetD3D9DeviceManager();
   if (!deviceManager ||
       !(mTexture = deviceManager->CreateTexture(mSize, format, D3DPOOL_SYSTEMMEM, nullptr))) {
     NS_WARNING("Could not create d3d9 texture");
     return false;
   }
 
+  if (aFlags & ALLOC_CLEAR_BUFFER) {
+    DebugOnly<bool> locked = Lock(OPEN_WRITE_ONLY);
+    MOZ_ASSERT(locked);
+    RefPtr<DrawTarget> dt = GetAsDrawTarget();
+    dt->ClearRect(Rect(0, 0, GetSize().width, GetSize().height));
+    Unlock();
+  }
+
   MOZ_ASSERT(mTexture);
   return true;
 }
 
 TextureClientData*
 CairoTextureClientD3D9::DropTextureData()
 {
   TextureClientData* data = new D3D9TextureClientData(mTexture);