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ImGUI 1.87 繪制D3D外部菜單( 二 )

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繪制效果如下：

ImGUI 1.87 繪制D3D外部菜單

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另外 ， Imgui也支持繪制到整個屏幕上，也可以當作全局GUI界面來使用 。
#include "imgui.h"#include "imgui_impl_dx9.h"#include "imgui_impl_win32.h"#include <d3d9.h>#include <tchar.h>#include <iostream>#pragma execution_character_set("utf-8")// 全局變量static HWND hwnd;static HWND GameHwnd;static RECT WindowRectangle;static int WindowWide, WindowHeight;static LPDIRECT3D9 g_pD3D = NULL;static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;static D3DPRESENT_PARAMETERS g_d3dpp = {};// 單選框設置狀態bool show_another_window = false;// imgui 回調函數// By: LySharkextern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);bool CreateDeviceD3D(HWND hWnd){ if ((g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)) == NULL) {return false; } 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; 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 = NULL; } if (g_pD3D) {g_pD3D->Release();g_pD3D = NULL; }}// https://www.cnblogs.com/lysharkvoid ResetDevice(){ ImGui_ImplDX9_InvalidateDeviceObjects(); HRESULT hr = g_pd3dDevice->Reset(&g_d3dpp); if (hr == D3DERR_INVALIDCALL) {IM_ASSERT(0); } ImGui_ImplDX9_CreateDeviceObjects();}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 (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED){g_d3dpp.BackBufferWidth = LOWORD(lParam);g_d3dpp.BackBufferHeight = HIWORD(lParam);ResetDevice();}return 0; case WM_SYSCOMMAND:if ((wParam & 0xfff0) == SC_KEYMENU){return 0;}break; case WM_DESTROY:PostQuitMessage(0);return 0; } return DefWindowProc(hWnd, msg, wParam, lParam);}// 繪制主方法// lyshark.comvoid DrawImGUI(){ // 啟動IMGUI自繪 ImGui_ImplDX9_NewFrame(); ImGui_ImplWin32_NewFrame(); ImGui::NewFrame(); static float f = 0.0f; static int counter = 0; static char sz[256] = { 0 }; ImGui::Begin("LyShark 輔助GUI主菜單"); ImGui::Text("這是一段測試字符串"); ImGui::Checkbox("彈出子窗口", &show_another_window); ImGui::SliderFloat("浮點條", &f, 0.0f, 1.0f); ImGui::InputText("輸入內容", sz, 256, 0, 0, 0); if (ImGui::Button("點我觸發"))counter++; ImGui::SameLine(); ImGui::Text("觸發次數 = %d", counter); ImGui::Text("當前FPS: %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate); ImGui::End(); if (show_another_window) {ImGui::Begin("我是子窗體", &show_another_window);ImGui::Text(" 您好,LyShark !");if (ImGui::Button("關閉窗體"))show_another_window = false;ImGui::End(); } ImGui::EndFrame();}// 自身窗口循環事件void WindowMessageLoop(){ bool done = false; while (!done) {// 每次都將窗體置頂并跟隨游戲窗體移動GetWindowRect(GameHwnd, &WindowRectangle);WindowWide = (WindowRectangle.right) - (WindowRectangle.left);WindowHeight = (WindowRectangle.bottom) - (WindowRectangle.top);DWORD dwStyle = GetWindowLong(GameHwnd, GWL_STYLE);if (dwStyle & WS_BORDER){WindowRectangle.top += 23;WindowHeight -= 23;}// 跟隨窗口移動MoveWindow(hwnd, WindowRectangle.left + 8, WindowRectangle.top + 8, WindowWide - 11, WindowHeight - 11, true);// 開始消息循環MSG msg;while (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE)){TranslateMessage(&msg);DispatchMessage(&msg);if (msg.message == WM_QUIT){done = true;}}if (done){break;}// 開始繪制DrawImGUI();g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, FALSE);g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, FALSE);g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0, 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);if (result == D3DERR_DEVICELOST && g_pd3dDevice->TestCooperativeLevel() == D3DERR_DEVICENOTRESET){ResetDevice();} }}int main(int argc, char *argv[]){ // 注冊窗體類 WNDCLASSEX wc; // 附加到整個屏幕上 wc.cbClsExtra = NULL; wc.cbSize = sizeof(WNDCLASSEX); wc.cbWndExtra = NULL; wc.hbrBackground = (HBRUSH)CreateSolidBrush(RGB(0, 0, 0)); wc.hCursor = LoadCursor(0, IDC_ARROW); wc.hIcon = LoadIcon(0, IDI_APPLICATION); wc.hIconSm = LoadIcon(0, IDI_APPLICATION); wc.hInstance = GetModuleHandle(NULL); wc.lpfnWndProc = (WNDPROC)WndProc; wc.lpszClassName = L" "; wc.lpszMenuName = L" "; wc.style = CS_VREDRAW | CS_HREDRAW; ::RegisterClassEx(&wc); // 屏幕寬度和高度 WindowWide = GetSystemMetrics(SM_CXSCREEN); WindowHeight = GetSystemMetrics(SM_CYSCREEN); // 創建窗體 HWND hwnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_LAYERED | WS_EX_TOOLWINDOW, L" ", L" ", WS_POPUP, 1, 1, WindowWide, WindowHeight, 0, 0, wc.hInstance, 0); // 顯示窗口 SetLayeredWindowAttributes(hwnd, 0, 1.0f, LWA_ALPHA); SetLayeredWindowAttributes(hwnd, 0, RGB(0, 0, 0), LWA_COLORKEY); ShowWindow(hwnd, SW_SHOW); // 初始化D3D if (!CreateDeviceD3D(hwnd)) {CleanupDeviceD3D();UnregisterClass(wc.lpszClassName, wc.hInstance);return 0; } // 更新窗體 UpdateWindow(hwnd); // 初始化ImGUI ImGui::CreateContext(); ImGuiIO& io = ImGui::GetIO(); (void)io; io.Fonts->AddFontFromFileTTF("c:/windows/fonts/simhei.ttf", 13.0f, NULL, io.Fonts->GetGlyphRangesChineseSimplifiedCommon()); ImGui::StyleColorsDark(); ImGui_ImplWin32_Init(hwnd); ImGui_ImplDX9_Init(g_pd3dDevice); // 開始執行繪制循環事件 WindowMessageLoop(); ImGui_ImplDX9_Shutdown(); ImGui_ImplWin32_Shutdown(); ImGui::DestroyContext(); CleanupDeviceD3D(); DestroyWindow(hwnd); UnregisterClass(wc.lpszClassName, wc.hInstance); return 0;}

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