From 353c7f76715a37e45ff63df8dbb35ff2b657ae26 Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Sun, 26 Apr 2020 12:52:50 +0100
Subject: [PATCH] [tests] Add D3D9 swapchain refcounting tests

---
 tests/d3d9/test_d3d9_triangle.cpp | 38 +++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tests/d3d9/test_d3d9_triangle.cpp b/tests/d3d9/test_d3d9_triangle.cpp
index 5e6bc8b4..81549d0c 100644
--- a/tests/d3d9/test_d3d9_triangle.cpp
+++ b/tests/d3d9/test_d3d9_triangle.cpp
@@ -116,6 +116,44 @@ public:
       nullptr,
       &m_device);
 
+    // Funny Swapchain Refcounting
+    // "One of the things COM does really well, is lifecycle management"
+    // Implicit Swapchain
+    {
+      IDirect3DSurface9* pSurface1 = nullptr;
+      IDirect3DSurface9* pSurface2 = nullptr;
+      status = m_device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pSurface1);
+      D3DPRESENT_PARAMETERS newParams = params;
+      newParams.BackBufferWidth  = 10;
+      newParams.BackBufferHeight = 10;
+      status = m_device->Reset(&newParams);
+      status = m_device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pSurface2);
+
+      IDirect3DSwapChain9* pSwapChain2 = nullptr;
+      IDirect3DSwapChain9* pSwapChain3 = nullptr;
+      status = pSurface1->GetContainer(__uuidof(IDirect3DSwapChain9), reinterpret_cast<void**>(&pSwapChain2));
+      status = pSurface2->GetContainer(__uuidof(IDirect3DSwapChain9), reinterpret_cast<void**>(&pSwapChain3));
+
+      printf("E_NOINTERFACE! for pSwapchain2");
+      status = m_device->Reset(&params);
+    }
+    // Additional swapchain
+    {
+      IDirect3DSwapChain9* pSwapChain2 = nullptr;
+      IDirect3DSwapChain9* pSwapChain3 = nullptr;
+      IDirect3DSwapChain9* pSwapChain4 = nullptr;
+      IDirect3DSurface9* pSurface = nullptr;
+      status = m_device->CreateAdditionalSwapChain(&params, &pSwapChain2);
+      status = pSwapChain2->GetBackBuffer(0, D3DBACKBUFFER_TYPE_MONO, &pSurface);
+      status = pSurface->GetContainer(__uuidof(IDirect3DSwapChain9), reinterpret_cast<void**>(&pSwapChain3));
+      pSwapChain2->Release();
+      UINT count = pSwapChain2->Release();
+      printf("Count: %u - Should be 0 and swapchain dead!", count);
+      status = pSurface->GetContainer(__uuidof(IDirect3DSwapChain9), reinterpret_cast<void**>(&pSwapChain4));
+      // E_NOINTERFACE !
+      printf("E_NOINTERFACE!");
+    }
+
     m_device->AddRef();
 
     Com<IDirect3DSurface9> backbuffer;