D3D12on7 changes

- Revert 2facdc7 (resize detection); was causing CTD even if not resizing for some users
- Initialize m_outWidth and m_outHeight

src/overlay/Overlay_D3D12.cpp

@@ -227,6 +227,8 @@ bool Overlay::InitializeD3D12Downlevel(ID3D12CommandQueue* pCommandQueue, ID3D12
     }
 
     m_pCommandQueue = pCommandQueue;
+    m_outWidth = static_cast<UINT>(pSourceTex2D->GetDesc().Width);
+    m_outHeight = pSourceTex2D->GetDesc().Height;
 
     if (hWindow != m_hWnd) 
         spdlog::warn("Overlay::InitializeD3D12Downlevel() - current output window does not match hooked window! Currently hooked to {0} while current output window is {1}.", reinterpret_cast<void*>(m_hWnd), reinterpret_cast<void*>(hWindow));

src/overlay/Overlay_Hooks.cpp

@@ -173,27 +173,15 @@ HRESULT Overlay::PresentD3D12Downlevel(ID3D12CommandQueueDownlevel* pCommandQueu
 {
     auto& overlay = Get();
 
-    // On Windows 7 there is no swap chain to query the current backbuffer index. Instead do a reverse lookup in the known backbuffer list
-    const auto it = std::find(overlay.m_downlevelBackbuffers.cbegin(), overlay.m_downlevelBackbuffers.cend(), pSourceTex2D);
-    bool resizing = false;
-    if (it == overlay.m_downlevelBackbuffers.cend())
-    {
-        if (overlay.m_initialized)
-        {
-            spdlog::warn("Overlay::PresentD3D12Downlevel() - buffer at {0} not found in backbuffer list! Assuming window was resized - note that support for resizing is experimental.", (void*)pSourceTex2D);
-            overlay.ResetD3D12State();
-        }
+    // On Windows 7 there is no swap chain to query the current backbuffer index, so instead we simply count to 3 and wrap around.
+    // Increment the buffer index here even if the overlay is not enabled, so we stay in sync with the game's present calls.
+    // TODO: investigate if there isn't a better way of doing this (finding the current index in the game exe?)
+    overlay.m_downlevelBufferIndex = (!overlay.m_initialized || overlay.m_downlevelBufferIndex == 2) ? 0 : overlay.m_downlevelBufferIndex + 1;
 
-        overlay.m_downlevelBackbuffers.emplace_back(pSourceTex2D);
-
-        // If we don't have a full backbuffer list, do not attempt to reinitialize yet
-        resizing = overlay.m_downlevelBackbuffers.size() < 3;
-    }
-    else
-       overlay.m_downlevelBufferIndex = static_cast<uint32_t>(std::distance(overlay.m_downlevelBackbuffers.cbegin(), it));
-
-    if (!resizing && overlay.InitializeD3D12Downlevel(overlay.m_pCommandQueue, pSourceTex2D, hWindow))
+    if (overlay.InitializeD3D12Downlevel(overlay.m_pCommandQueue, pSourceTex2D, hWindow))
+    {
         overlay.Render();
+    }
 
     return overlay.m_realPresentD3D12Downlevel(pCommandQueueDownlevel, pOpenCommandList, pSourceTex2D, hWindow, Flags);
 }