fix(d3d11): recreate RTV per-frame instead of ResizeBuffers hook

kiero2 swapchain_methods vtable layout is unreliable for ResizeBuffers
(index 13 returns DXGI_ERROR_INVALID_CALL on both test app and game).
Instead, recreate RTV from GetBuffer(0) each frame in DX11::Render.

Author: StArraySharp

StArray.ModManager.Windows/Native/CMakeLists.txt

@@ -57,5 +57,5 @@ add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
         "${CMAKE_CURRENT_SOURCE_DIR}/../bin/${CMAKE_BUILD_TYPE}/net10.0/"
         COMMAND ${CMAKE_COMMAND} -E copy_if_different
         "$<TARGET_FILE:${PROJECT_NAME}>"
-        "D:/Softwares/Steam/steamapps/common/A Dance of Fire and Ice/Corehold/managed"
+        "D:/Development/RiderProjects/StArray.ModManager/tests/Corehold/managed"
 )

StArray.ModManager.Windows/Native/hook_d3d11.cpp

@@ -21,14 +21,7 @@ namespace DX11 {
             DEBUG_LOG("D3D11::Init: GetDevice FAILED hr=0x%08X", hr); return;
         }
         Device->GetImmediateContext(&Context);
-
-        ID3D11Texture2D* backBuf = nullptr;
-        sc->GetBuffer(0, __uuidof(ID3D11Texture2D), (void**)&backBuf);
-        if (backBuf) {
-            Device->CreateRenderTargetView(backBuf, nullptr, &MainRTV);
-            backBuf->Release();
-        }
-        DEBUG_LOG("D3D11::Init: device=%p context=%p rtv=%p", Device, Context, MainRTV);
+        DEBUG_LOG("D3D11::Init: device=%p context=%p", Device, Context);
 
         imgui_callbacks.init_callback();
         ImGui_ImplWin32_Init(g_GameWindow);
@@ -37,7 +30,16 @@ namespace DX11 {
         DEBUG_LOG("D3D11::Init: complete");
     }
 
-    void Render(IDXGISwapChain*) {
+    void Render(IDXGISwapChain* sc) {
+        // Recreate RTV each frame from current backbuffer (handles resize automatically)
+        if (MainRTV) { MainRTV->Release(); MainRTV = nullptr; }
+        ID3D11Texture2D* backBuf = nullptr;
+        sc->GetBuffer(0, __uuidof(ID3D11Texture2D), (void**)&backBuf);
+        if (backBuf) {
+            Device->CreateRenderTargetView(backBuf, nullptr, &MainRTV);
+            backBuf->Release();
+        }
+
         ImGui_ImplDX11_NewFrame();
         if (imgui_callbacks.render_callback) imgui_callbacks.render_callback();
         if (MainRTV) Context->OMSetRenderTargets(1, &MainRTV, nullptr);

StArray.ModManager.Windows/Native/main.cpp

@@ -41,25 +41,16 @@ HRESULT APIENTRY hkPresent(IDXGISwapChain* sc, UINT sync, UINT flags) {
         }
         g_OriginalWndProc = (WNDPROC)SetWindowLongPtr(g_GameWindow, GWLP_WNDPROC, (__int3264)(LONG_PTR)WndProc);
         ImGui_Initialised = true;
-        if (g_OriginalWndProc)
-            DEBUG_LOG("hkPresent: wndproc hooked old=%p new=%p hwnd=%p OK", g_OriginalWndProc, WndProc, g_GameWindow);
-        else
-            DEBUG_LOG("hkPresent: SetWindowLongPtr FAILED err=%lu hwnd=%p", GetLastError(), g_GameWindow);
-        {
-            RECT cr; GetClientRect(g_GameWindow, &cr);
-            DXGI_SWAP_CHAIN_DESC sd; sc->GetDesc(&sd);
-            DEBUG_LOG("hkPresent: clientRect=%dx%d backbuf=%dx%d",
-                cr.right-cr.left, cr.bottom-cr.top,
-                sd.BufferDesc.Width, sd.BufferDesc.Height);
-        }
+        ImGuiIO* io = igGetIO();
+        DXGI_SWAP_CHAIN_DESC sd; sc->GetDesc(&sd);
+        io->DisplaySize.x = (float)sd.BufferDesc.Width; io->DisplaySize.y = (float)sd.BufferDesc.Height;
     }
-
-    if (GetAsyncKeyState(VK_INSERT) & 1) { ShowMenu = !ShowMenu; DEBUG_LOG("hkPresent: ShowMenu toggled -> %d", ShowMenu); }
-
-    ImGuiIO* io = igGetIO();
+    ImGui_ImplWin32_NewFrame();
+    // Set DisplaySize AFTER Win32_NewFrame — it overwrites io.DisplaySize with client rect!
+    /*
     { DXGI_SWAP_CHAIN_DESC sd; sc->GetDesc(&sd);
       io->DisplaySize.x = (float)sd.BufferDesc.Width; io->DisplaySize.y = (float)sd.BufferDesc.Height; }
-    ImGui_ImplWin32_NewFrame();
+      */
 
     switch (g_SelectedBackend) {
         case 4: case 3: // VK/GL: C# render only

StArray.ModManager.Windows/UI/ImGUIGLRenderer.cs

@@ -41,7 +41,7 @@ public static event Action OnRender
     }
 
     private bool _initialized;
-    private Action _onRender = () => { };
+    private event Action _onRender = () => { };
     private bool _imguiInited;
     private IntPtr _hwnd;
     private IntPtr _origWndProc;