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Diffstat (limited to 'imgui-1.92.1/examples/example_android_opengl3/main.cpp')
| -rw-r--r-- | imgui-1.92.1/examples/example_android_opengl3/main.cpp | 382 |
1 files changed, 0 insertions, 382 deletions
diff --git a/imgui-1.92.1/examples/example_android_opengl3/main.cpp b/imgui-1.92.1/examples/example_android_opengl3/main.cpp deleted file mode 100644 index 452cb77..0000000 --- a/imgui-1.92.1/examples/example_android_opengl3/main.cpp +++ /dev/null @@ -1,382 +0,0 @@ -// dear imgui: standalone example application for Android + OpenGL ES 3 - -// Learn about Dear ImGui: -// - FAQ https://dearimgui.com/faq -// - Getting Started https://dearimgui.com/getting-started -// - Documentation https://dearimgui.com/docs (same as your local docs/ folder). -// - Introduction, links and more at the top of imgui.cpp - -#include "imgui.h" -#include "imgui_impl_android.h" -#include "imgui_impl_opengl3.h" -#include <android/log.h> -#include <android_native_app_glue.h> -#include <android/asset_manager.h> -#include <EGL/egl.h> -#include <GLES3/gl3.h> -#include <string> - -// Data -static EGLDisplay g_EglDisplay = EGL_NO_DISPLAY; -static EGLSurface g_EglSurface = EGL_NO_SURFACE; -static EGLContext g_EglContext = EGL_NO_CONTEXT; -static struct android_app* g_App = nullptr; -static bool g_Initialized = false; -static char g_LogTag[] = "ImGuiExample"; -static std::string g_IniFilename = ""; - -// Forward declarations of helper functions -static void Init(struct android_app* app); -static void Shutdown(); -static void MainLoopStep(); -static int ShowSoftKeyboardInput(); -static int PollUnicodeChars(); -static int GetAssetData(const char* filename, void** out_data); - -// Main code -static void handleAppCmd(struct android_app* app, int32_t appCmd) -{ - switch (appCmd) - { - case APP_CMD_SAVE_STATE: - break; - case APP_CMD_INIT_WINDOW: - Init(app); - break; - case APP_CMD_TERM_WINDOW: - Shutdown(); - break; - case APP_CMD_GAINED_FOCUS: - case APP_CMD_LOST_FOCUS: - break; - } -} - -static int32_t handleInputEvent(struct android_app* app, AInputEvent* inputEvent) -{ - return ImGui_ImplAndroid_HandleInputEvent(inputEvent); -} - -void android_main(struct android_app* app) -{ - app->onAppCmd = handleAppCmd; - app->onInputEvent = handleInputEvent; - - while (true) - { - int out_events; - struct android_poll_source* out_data; - - // Poll all events. If the app is not visible, this loop blocks until g_Initialized == true. - while (ALooper_pollOnce(g_Initialized ? 0 : -1, nullptr, &out_events, (void**)&out_data) >= 0) - { - // Process one event - if (out_data != nullptr) - out_data->process(app, out_data); - - // Exit the app by returning from within the infinite loop - if (app->destroyRequested != 0) - { - // shutdown() should have been called already while processing the - // app command APP_CMD_TERM_WINDOW. But we play save here - if (!g_Initialized) - Shutdown(); - - return; - } - } - - // Initiate a new frame - MainLoopStep(); - } -} - -void Init(struct android_app* app) -{ - if (g_Initialized) - return; - - g_App = app; - ANativeWindow_acquire(g_App->window); - - // Initialize EGL - // This is mostly boilerplate code for EGL... - { - g_EglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY); - if (g_EglDisplay == EGL_NO_DISPLAY) - __android_log_print(ANDROID_LOG_ERROR, g_LogTag, "%s", "eglGetDisplay(EGL_DEFAULT_DISPLAY) returned EGL_NO_DISPLAY"); - - if (eglInitialize(g_EglDisplay, 0, 0) != EGL_TRUE) - __android_log_print(ANDROID_LOG_ERROR, g_LogTag, "%s", "eglInitialize() returned with an error"); - - const EGLint egl_attributes[] = { EGL_BLUE_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_RED_SIZE, 8, EGL_DEPTH_SIZE, 24, EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_NONE }; - EGLint num_configs = 0; - if (eglChooseConfig(g_EglDisplay, egl_attributes, nullptr, 0, &num_configs) != EGL_TRUE) - __android_log_print(ANDROID_LOG_ERROR, g_LogTag, "%s", "eglChooseConfig() returned with an error"); - if (num_configs == 0) - __android_log_print(ANDROID_LOG_ERROR, g_LogTag, "%s", "eglChooseConfig() returned 0 matching config"); - - // Get the first matching config - EGLConfig egl_config; - eglChooseConfig(g_EglDisplay, egl_attributes, &egl_config, 1, &num_configs); - EGLint egl_format; - eglGetConfigAttrib(g_EglDisplay, egl_config, EGL_NATIVE_VISUAL_ID, &egl_format); - ANativeWindow_setBuffersGeometry(g_App->window, 0, 0, egl_format); - - const EGLint egl_context_attributes[] = { EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE }; - g_EglContext = eglCreateContext(g_EglDisplay, egl_config, EGL_NO_CONTEXT, egl_context_attributes); - - if (g_EglContext == EGL_NO_CONTEXT) - __android_log_print(ANDROID_LOG_ERROR, g_LogTag, "%s", "eglCreateContext() returned EGL_NO_CONTEXT"); - - g_EglSurface = eglCreateWindowSurface(g_EglDisplay, egl_config, g_App->window, nullptr); - eglMakeCurrent(g_EglDisplay, g_EglSurface, g_EglSurface, g_EglContext); - } - - // Setup Dear ImGui context - IMGUI_CHECKVERSION(); - ImGui::CreateContext(); - ImGuiIO& io = ImGui::GetIO(); - - // Redirect loading/saving of .ini file to our location. - // Make sure 'g_IniFilename' persists while we use Dear ImGui. - g_IniFilename = std::string(app->activity->internalDataPath) + "/imgui.ini"; - io.IniFilename = g_IniFilename.c_str();; - - // Setup Dear ImGui style - ImGui::StyleColorsDark(); - //ImGui::StyleColorsLight(); - - // Setup Platform/Renderer backends - ImGui_ImplAndroid_Init(g_App->window); - ImGui_ImplOpenGL3_Init("#version 300 es"); - - // 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. - // - 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). - // - 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 \\ ! - // - Android: The TTF files have to be placed into the assets/ directory (android/app/src/main/assets), we use our GetAssetData() helper to retrieve them. - - // We load the default font with increased size to improve readability on many devices with "high" DPI. - // FIXME: Put some effort into DPI awareness. - // Important: when calling AddFontFromMemoryTTF(), ownership of font_data is transferred by Dear ImGui by default (deleted is handled by Dear ImGui), unless we set FontDataOwnedByAtlas=false in ImFontConfig - ImFontConfig font_cfg; - font_cfg.SizePixels = 22.0f; - io.Fonts->AddFontDefault(&font_cfg); - //void* font_data; - //int font_data_size; - //ImFont* font; - //font_data_size = GetAssetData("segoeui.ttf", &font_data); - //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 16.0f); - //IM_ASSERT(font != nullptr); - //font_data_size = GetAssetData("DroidSans.ttf", &font_data); - //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 16.0f); - //IM_ASSERT(font != nullptr); - //font_data_size = GetAssetData("Roboto-Medium.ttf", &font_data); - //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 16.0f); - //IM_ASSERT(font != nullptr); - //font_data_size = GetAssetData("Cousine-Regular.ttf", &font_data); - //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 15.0f); - //IM_ASSERT(font != nullptr); - //font_data_size = GetAssetData("ArialUni.ttf", &font_data); - //font = io.Fonts->AddFontFromMemoryTTF(font_data, font_data_size, 18.0f); - //IM_ASSERT(font != nullptr); - - // Arbitrary scale-up - // FIXME: Put some effort into DPI awareness - ImGui::GetStyle().ScaleAllSizes(3.0f); - - g_Initialized = true; -} - -void MainLoopStep() -{ - ImGuiIO& io = ImGui::GetIO(); - if (g_EglDisplay == EGL_NO_DISPLAY) - return; - - // Our state - // (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow) - static bool show_demo_window = true; - static bool show_another_window = false; - static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f); - - // Poll Unicode characters via JNI - // FIXME: do not call this every frame because of JNI overhead - PollUnicodeChars(); - - // Open on-screen (soft) input if requested by Dear ImGui - static bool WantTextInputLast = false; - if (io.WantTextInput && !WantTextInputLast) - ShowSoftKeyboardInput(); - WantTextInputLast = io.WantTextInput; - - // Start the Dear ImGui frame - ImGui_ImplOpenGL3_NewFrame(); - ImGui_ImplAndroid_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::Render(); - glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y); - glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w); - glClear(GL_COLOR_BUFFER_BIT); - ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData()); - eglSwapBuffers(g_EglDisplay, g_EglSurface); -} - -void Shutdown() -{ - if (!g_Initialized) - return; - - // Cleanup - ImGui_ImplOpenGL3_Shutdown(); - ImGui_ImplAndroid_Shutdown(); - ImGui::DestroyContext(); - - if (g_EglDisplay != EGL_NO_DISPLAY) - { - eglMakeCurrent(g_EglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); - - if (g_EglContext != EGL_NO_CONTEXT) - eglDestroyContext(g_EglDisplay, g_EglContext); - - if (g_EglSurface != EGL_NO_SURFACE) - eglDestroySurface(g_EglDisplay, g_EglSurface); - - eglTerminate(g_EglDisplay); - } - - g_EglDisplay = EGL_NO_DISPLAY; - g_EglContext = EGL_NO_CONTEXT; - g_EglSurface = EGL_NO_SURFACE; - ANativeWindow_release(g_App->window); - - g_Initialized = false; -} - -// Helper functions - -// Unfortunately, there is no way to show the on-screen input from native code. -// Therefore, we call ShowSoftKeyboardInput() of the main activity implemented in MainActivity.kt via JNI. -static int ShowSoftKeyboardInput() -{ - JavaVM* java_vm = g_App->activity->vm; - JNIEnv* java_env = nullptr; - - jint jni_return = java_vm->GetEnv((void**)&java_env, JNI_VERSION_1_6); - if (jni_return == JNI_ERR) - return -1; - - jni_return = java_vm->AttachCurrentThread(&java_env, nullptr); - if (jni_return != JNI_OK) - return -2; - - jclass native_activity_clazz = java_env->GetObjectClass(g_App->activity->clazz); - if (native_activity_clazz == nullptr) - return -3; - - jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "showSoftInput", "()V"); - if (method_id == nullptr) - return -4; - - java_env->CallVoidMethod(g_App->activity->clazz, method_id); - - jni_return = java_vm->DetachCurrentThread(); - if (jni_return != JNI_OK) - return -5; - - return 0; -} - -// Unfortunately, the native KeyEvent implementation has no getUnicodeChar() function. -// Therefore, we implement the processing of KeyEvents in MainActivity.kt and poll -// the resulting Unicode characters here via JNI and send them to Dear ImGui. -static int PollUnicodeChars() -{ - JavaVM* java_vm = g_App->activity->vm; - JNIEnv* java_env = nullptr; - - jint jni_return = java_vm->GetEnv((void**)&java_env, JNI_VERSION_1_6); - if (jni_return == JNI_ERR) - return -1; - - jni_return = java_vm->AttachCurrentThread(&java_env, nullptr); - if (jni_return != JNI_OK) - return -2; - - jclass native_activity_clazz = java_env->GetObjectClass(g_App->activity->clazz); - if (native_activity_clazz == nullptr) - return -3; - - jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "pollUnicodeChar", "()I"); - if (method_id == nullptr) - return -4; - - // Send the actual characters to Dear ImGui - ImGuiIO& io = ImGui::GetIO(); - jint unicode_character; - while ((unicode_character = java_env->CallIntMethod(g_App->activity->clazz, method_id)) != 0) - io.AddInputCharacter(unicode_character); - - jni_return = java_vm->DetachCurrentThread(); - if (jni_return != JNI_OK) - return -5; - - return 0; -} - -// Helper to retrieve data placed into the assets/ directory (android/app/src/main/assets) -static int GetAssetData(const char* filename, void** outData) -{ - int num_bytes = 0; - AAsset* asset_descriptor = AAssetManager_open(g_App->activity->assetManager, filename, AASSET_MODE_BUFFER); - if (asset_descriptor) - { - num_bytes = AAsset_getLength(asset_descriptor); - *outData = IM_ALLOC(num_bytes); - int64_t num_bytes_read = AAsset_read(asset_descriptor, *outData, num_bytes); - AAsset_close(asset_descriptor); - IM_ASSERT(num_bytes_read == num_bytes); - } - return num_bytes; -} |