standalone_dx9.cpp

// dear imgui: standalone example application for DirectX 9
// If you are new to dear imgui, see examples/README.txt and documentation at the top of imgui.cpp.

#include "dx9menu.h"
#include "menu.h"
#include "menuimpl.h"
#include "imgui.h"
#include "imgui/examples/imgui_impl_dx9.h"
#include "imgui/examples/imgui_impl_win32.h"

// Data
static LPDIRECT3DDEVICE9        g_pd3dDevice = NULL;
static D3DPRESENT_PARAMETERS    g_d3dpp;

extern LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	if (DX9Menu::WndProc(hWnd, msg, wParam, lParam))
		return true;

    switch (msg)
    {
    case WM_SIZE:
        if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)
        {
            ImGui_ImplDX9_InvalidateDeviceObjects();
            g_d3dpp.BackBufferWidth  = LOWORD(lParam);
            g_d3dpp.BackBufferHeight = HIWORD(lParam);
            HRESULT hr = g_pd3dDevice->Reset(&g_d3dpp);
            if (hr == D3DERR_INVALIDCALL)
                IM_ASSERT(0);
            ImGui_ImplDX9_CreateDeviceObjects();
        }
        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 DefWindowProc(hWnd, msg, wParam, lParam);
}

int main(int, char**)
{
    // Create application window
    WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, NULL, NULL, _T("ImGui Example"), NULL };
    RegisterClassEx(&wc);
    HWND hwnd = CreateWindow(wc.lpszClassName, _T("Dear ImGui DirectX9 Example"), WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);

    // Initialize Direct3D
    LPDIRECT3D9 pD3D;
    if ((pD3D = Direct3DCreate9(D3D_SDK_VERSION)) == NULL)
    {
        UnregisterClass(wc.lpszClassName, wc.hInstance);
        return 0;
    }
    ZeroMemory(&g_d3dpp, sizeof(g_d3dpp));
    g_d3dpp.Windowed = TRUE;
    g_d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    g_d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
    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

    // Create the D3DDevice
    if (pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &g_d3dpp, &g_pd3dDevice) < 0)
    {
        pD3D->Release();
        UnregisterClass(wc.lpszClassName, wc.hInstance);
        return 0;
    }

    // Setup Dear ImGui context
    IMGUI_CHECKVERSION();

	DX9Menu::InitializeContext(g_pd3dDevice, hwnd);

    ImGuiIO& io = ImGui::GetIO(); (void)io;
    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls

	Menu::InitializeStyle();
	Menu::InitializeFonts();

    ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);

    // Main loop
    MSG msg;
    ZeroMemory(&msg, sizeof(msg));
    ShowWindow(hwnd, SW_SHOWDEFAULT);
    UpdateWindow(hwnd);
    while (msg.message != WM_QUIT)
    {
        // Poll and handle messages (inputs, window resize, etc.)
        // 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.
        // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
        // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
        if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
            continue;
        }

        // Start the Dear ImGui frame
        ImGui_ImplDX9_NewFrame();
        ImGui_ImplWin32_NewFrame();
        ImGui::NewFrame();

	    MenuImpl::Render();

        // 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*255.0f), (int)(clear_color.y*255.0f), (int)(clear_color.z*255.0f), (int)(clear_color.w*255.0f));
        g_pd3dDevice->Clear(0, NULL, 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(NULL, NULL, NULL, NULL);

        // Handle loss of D3D9 device
        if (result == D3DERR_DEVICELOST && g_pd3dDevice->TestCooperativeLevel() == D3DERR_DEVICENOTRESET)
        {
            ImGui_ImplDX9_InvalidateDeviceObjects();
            g_pd3dDevice->Reset(&g_d3dpp);
            ImGui_ImplDX9_CreateDeviceObjects();
        }
    }

    ImGui_ImplDX9_Shutdown();
    ImGui_ImplWin32_Shutdown();
    ImGui::DestroyContext();

    if (g_pd3dDevice) g_pd3dDevice->Release();
    if (pD3D) pD3D->Release();
    DestroyWindow(hwnd);
    UnregisterClass(wc.lpszClassName, wc.hInstance);

    return 0;
}