// Dear ImGui: standalone example application for DirectX 9 // If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp. // Read online: https://github.com/ocornut/imgui/tree/master/docs #include "imgui.h" #include "imgui_impl_dx9.h" #include "imgui_impl_win32.h" #include #include // Data static LPDIRECT3D9 g_pD3D = nullptr; static LPDIRECT3DDEVICE9 g_pd3dDevice = nullptr; static UINT g_ResizeWidth = 0, g_ResizeHeight = 0; static D3DPRESENT_PARAMETERS g_d3dpp = {}; // Forward declarations of helper functions bool CreateDeviceD3D(HWND hWnd); void CleanupDeviceD3D(); void ResetDevice(); LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); // Main code int main(int, char**) { // Create application window //ImGui_ImplWin32_EnableDpiAwareness(); WNDCLASSEXW wc = { sizeof(wc), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(nullptr), nullptr, nullptr, nullptr, nullptr, L"ImGui Example", nullptr }; ::RegisterClassExW(&wc); HWND hwnd = ::CreateWindowW(wc.lpszClassName, L"Dear ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, nullptr, nullptr, wc.hInstance, nullptr); // Initialize Direct3D if (!CreateDeviceD3D(hwnd)) { CleanupDeviceD3D(); ::UnregisterClassW(wc.lpszClassName, wc.hInstance); return 1; } // Show the window ::ShowWindow(hwnd, SW_SHOWDEFAULT); ::UpdateWindow(hwnd); // Setup Dear ImGui context IMGUI_CHECKVERSION(); ImGui::CreateContext(); ImGuiIO& io = ImGui::GetIO(); (void)io; io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls // Setup Dear ImGui style ImGui::StyleColorsDark(); //ImGui::StyleColorsLight(); // Setup Platform/Renderer backends ImGui_ImplWin32_Init(hwnd); ImGui_ImplDX9_Init(g_pd3dDevice); // Load Fonts // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple. // - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit). // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call. // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering. // - Read 'docs/FONTS.md' for more instructions and details. // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ ! //io.Fonts->AddFontDefault(); //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f); //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f); //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f); //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f); //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese()); //IM_ASSERT(font != nullptr); // Our state bool show_demo_window = true; bool show_another_window = false; ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f); // Main loop bool done = false; while (!done) { // Poll and handle messages (inputs, window resize, etc.) // See the WndProc() function below for our to dispatch events to the Win32 backend. MSG msg; while (::PeekMessage(&msg, nullptr, 0U, 0U, PM_REMOVE)) { ::TranslateMessage(&msg); ::DispatchMessage(&msg); if (msg.message == WM_QUIT) done = true; } if (done) break; // Handle window resize (we don't resize directly in the WM_SIZE handler) if (g_ResizeWidth != 0 && g_ResizeHeight != 0) { g_d3dpp.BackBufferWidth = g_ResizeWidth; g_d3dpp.BackBufferHeight = g_ResizeHeight; g_ResizeWidth = g_ResizeHeight = 0; ResetDevice(); } // Start the Dear ImGui frame ImGui_ImplDX9_NewFrame(); ImGui_ImplWin32_NewFrame(); ImGui::NewFrame(); // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!). if (show_demo_window) ImGui::ShowDemoWindow(&show_demo_window); // 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window. { static float f = 0.0f; static int counter = 0; ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it. ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too) ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state ImGui::Checkbox("Another Window", &show_another_window); ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated) counter++; ImGui::SameLine(); ImGui::Text("counter = %d", counter); ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate); ImGui::End(); } // 3. Show another simple window. if (show_another_window) { ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked) ImGui::Text("Hello from another window!"); if (ImGui::Button("Close Me")) show_another_window = false; ImGui::End(); } // Rendering ImGui::EndFrame(); g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, FALSE); g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE); g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, FALSE); D3DCOLOR clear_col_dx = D3DCOLOR_RGBA((int)(clear_color.x*clear_color.w*255.0f), (int)(clear_color.y*clear_color.w*255.0f), (int)(clear_color.z*clear_color.w*255.0f), (int)(clear_color.w*255.0f)); g_pd3dDevice->Clear(0, nullptr, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, clear_col_dx, 1.0f, 0); if (g_pd3dDevice->BeginScene() >= 0) { ImGui::Render(); ImGui_ImplDX9_RenderDrawData(ImGui::GetDrawData()); g_pd3dDevice->EndScene(); } HRESULT result = g_pd3dDevice->Present(nullptr, nullptr, nullptr, nullptr); // Handle loss of D3D9 device if (result == D3DERR_DEVICELOST && g_pd3dDevice->TestCooperativeLevel() == D3DERR_DEVICENOTRESET) ResetDevice(); } ImGui_ImplDX9_Shutdown(); ImGui_ImplWin32_Shutdown(); ImGui::DestroyContext(); CleanupDeviceD3D(); ::DestroyWindow(hwnd); ::UnregisterClassW(wc.lpszClassName, wc.hInstance); return 0; } // Helper functions bool CreateDeviceD3D(HWND hWnd) { if ((g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)) == nullptr) return false; // Create the D3DDevice ZeroMemory(&g_d3dpp, sizeof(g_d3dpp)); g_d3dpp.Windowed = TRUE; g_d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; g_d3dpp.BackBufferFormat = D3DFMT_UNKNOWN; // Need to use an explicit format with alpha if needing per-pixel alpha composition. g_d3dpp.EnableAutoDepthStencil = TRUE; g_d3dpp.AutoDepthStencilFormat = D3DFMT_D16; g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_ONE; // Present with vsync //g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE; // Present without vsync, maximum unthrottled framerate if (g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &g_d3dpp, &g_pd3dDevice) < 0) return false; return true; } void CleanupDeviceD3D() { if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = nullptr; } if (g_pD3D) { g_pD3D->Release(); g_pD3D = nullptr; } } void ResetDevice() { ImGui_ImplDX9_InvalidateDeviceObjects(); HRESULT hr = g_pd3dDevice->Reset(&g_d3dpp); if (hr == D3DERR_INVALIDCALL) IM_ASSERT(0); ImGui_ImplDX9_CreateDeviceObjects(); } // Forward declare message handler from imgui_impl_win32.cpp extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); // Win32 message handler // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs. // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data. // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data. // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags. LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { if (ImGui_ImplWin32_WndProcHandler(hWnd, msg, wParam, lParam)) return true; switch (msg) { case WM_SIZE: if (wParam == SIZE_MINIMIZED) return 0; g_ResizeWidth = (UINT)LOWORD(lParam); // Queue resize g_ResizeHeight = (UINT)HIWORD(lParam); return 0; case WM_SYSCOMMAND: if ((wParam & 0xfff0) == SC_KEYMENU) // Disable ALT application menu return 0; break; case WM_DESTROY: ::PostQuitMessage(0); return 0; } return ::DefWindowProcW(hWnd, msg, wParam, lParam); }