mirror of
https://github.com/ocornut/imgui.git
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120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
#include <jni.h>
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#include <thread>
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#include <chrono>
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#include <dlfcn.h>
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#include <android/native_window.h>
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#include <EGL/egl.h>
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#include <GLES3/gl3.h>
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#include <android/log.h>
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#include "dobby.h"
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#include "imgui.h"
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#include "backends/imgui_impl_android.h"
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#include "backends/imgui_impl_opengl3.h"
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#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, "ModMenu", __VA_ARGS__)
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// 全局变量
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static ANativeWindow* g_AndroidWindow = nullptr;
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static bool g_ImGuiReady = false;
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static int g_GlWidth = 0;
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static int g_GlHeight = 0;
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// 原始 eglSwapBuffers 函数指针类型定义
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typedef EGLBoolean (*eglSwapBuffers_t)(EGLDisplay dpy, EGLSurface surface);
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eglSwapBuffers_t original_eglSwapBuffers = nullptr;
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// ==================== ImGui 菜单绘制 ====================
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void RenderImGui() {
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if (!g_ImGuiReady) return;
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ImGui_ImplOpenGL3_NewFrame();
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ImGui_ImplAndroid_NewFrame();
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ImGui::NewFrame();
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// 在这里绘制你的菜单内容
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ImGui::Begin("Mod Menu");
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ImGui::Text("Injected via eglSwapBuffers Hook");
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ImGui::Text("FPS: %.1f", ImGui::GetIO().Framerate);
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if (ImGui::Button("Click me")) {
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LOGI("Button clicked!");
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}
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ImGui::End();
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ImGui::Render();
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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}
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// ==================== Hook 函数 ====================
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EGLBoolean hooked_eglSwapBuffers(EGLDisplay dpy, EGLSurface surface) {
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// 延迟初始化 ImGui（只执行一次）
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static bool initialized = false;
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if (!initialized && g_AndroidWindow != nullptr) {
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// 获取 EGL 上下文信息
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eglQuerySurface(dpy, surface, EGL_WIDTH, &g_GlWidth);
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eglQuerySurface(dpy, surface, EGL_HEIGHT, &g_GlHeight);
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// 初始化 ImGui
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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ImGui_ImplAndroid_Init(g_AndroidWindow);
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ImGui_ImplOpenGL3_Init("#version 300 es");
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ImGui::StyleColorsDark();
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initialized = true;
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g_ImGuiReady = true;
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LOGI("ImGui initialized successfully! Width: %d, Height: %d", g_GlWidth, g_GlHeight);
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}
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// 执行 ImGui 绘制
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if (g_ImGuiReady) {
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RenderImGui();
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}
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// 调用原函数，保证游戏画面正常显示
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return original_eglSwapBuffers(dpy, surface);
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}
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// ==================== 安装 Hook ====================
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void InstallHook() {
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void* libegl = dlopen("libEGL.so", RTLD_LAZY);
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if (!libegl) {
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LOGI("Failed to load libEGL.so");
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return;
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}
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void* func = dlsym(libegl, "eglSwapBuffers");
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if (func) {
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DobbyHook(func, (void*)hooked_eglSwapBuffers, (void**)&original_eglSwapBuffers);
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LOGI("Dobby hook installed on eglSwapBuffers");
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}
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dlclose(libegl);
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}
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// ==================== 等待 libEGL 加载并 Hook ====================
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void SetupHooksThread() {
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LOGI("SetupHooksThread started, waiting for libEGL.so...");
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while (true) {
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if (dlopen("libEGL.so", RTLD_LAZY | RTLD_NOLOAD)) {
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LOGI("libEGL.so found, installing hook...");
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InstallHook();
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break;
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}
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std::this_thread::sleep_for(std::chrono::seconds(1));
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}
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}
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// ==================== so 入口 ====================
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__attribute__((constructor))
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void Init() {
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LOGI("libmodmenu.so loaded!");
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std::thread(SetupHooksThread).detach();
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}
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// ==================== JNI 函数，用于从 Java 层传递 ANativeWindow ====================
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extern "C" JNIEXPORT void JNICALL
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Java_com_yourpackage_ModMenu_setNativeWindow(JNIEnv* env, jobject thiz, jobject surface) {
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if (surface != nullptr) {
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g_AndroidWindow = ANativeWindow_fromSurface(env, surface);
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LOGI("Native window received from Java layer");
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}
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}
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