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satdump/android/main.cpp
Aang23 fba70dc2a5 Oops
2025-07-10 21:07:17 +02:00

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#include "backend.h"
#include "core/config.h"
#include "init.h"
#include "loader/loader.h"
#include "logger.h"
#include "main_ui.h"
#include <android/asset_manager.h>
#include <android/log.h>
#include <unistd.h>
// Data
EGLDisplay g_EglDisplay = EGL_NO_DISPLAY;
EGLSurface g_EglSurface = EGL_NO_SURFACE;
static EGLContext g_EglContext = EGL_NO_CONTEXT;
static bool g_Initialized = false;
static char g_LogTag[] = "SatDump";
extern struct android_app *g_App;
extern std::string android_plugins_dir;
bool was_init = false;
// Forward declarations of helper functions
static int ShowSoftKeyboardInput();
static int HideSoftKeyboardInput();
static int PollUnicodeChars();
static int GetAssetData(const char *filename, void **out_data);
void bindImageTextureFunctions();
void init(struct android_app *app)
{
setenv("LIBUSB_ANDROID_JVM_PTR", std::to_string((size_t)app).c_str(), true);
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, NULL);
eglMakeCurrent(g_EglDisplay, g_EglSurface, g_EglSurface, g_EglContext);
}
if (!was_init)
{
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO &io = ImGui::GetIO();
// Disable loading/saving of .ini file from disk.
// FIXME: Consider using LoadIniSettingsFromMemory() / SaveIniSettingsToMemory() to save in appropriate location for Android.
io.IniFilename = NULL;
}
// Setup Platform/Renderer backends
ImGui_ImplAndroid_Init(g_App->window);
ImGui_ImplOpenGL3_Init("#version 300 es");
if (!was_init)
{
// Setup Dear ImGui style
// ImGui::StyleColorsDark();
// ImGui::StyleColorsClassic();
initLogger();
style::setFonts(backend::device_scale);
HideSoftKeyboardInput();
eglSwapInterval(g_EglDisplay, 0);
std::shared_ptr<satdump::LoadingScreenSink> loading_screen_sink = std::make_shared<satdump::LoadingScreenSink>();
logger->add_sink(loading_screen_sink);
satdump::tle_do_update_on_init = false;
satdump::initSatdump();
satdump::initMainUI();
// Shut down loading screen
logger->del_sink(loading_screen_sink);
loading_screen_sink.reset();
// Set font again to adjust for DPI
eglSwapInterval(g_EglDisplay, 1);
// TLE
satdump::ui_thread_pool.push([&](int) { satdump::autoUpdateTLE(satdump::user_path + "/satdump_tles.txt"); });
was_init = true;
}
else
HideSoftKeyboardInput();
g_Initialized = true;
}
void tick()
{
ImGuiIO &io = ImGui::GetIO();
if (g_EglDisplay == EGL_NO_DISPLAY)
return;
// 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();
if (!io.WantTextInput && WantTextInputLast)
HideSoftKeyboardInput();
WantTextInputLast = io.WantTextInput;
// Rendering
satdump::renderMainUI();
}
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;
}
static void handleAppCmd(struct android_app *app, int32_t appCmd)
{
switch (appCmd)
{
case APP_CMD_INIT_WINDOW:
init(app);
break;
case APP_CMD_TERM_WINDOW:
case APP_CMD_PAUSE:
shutdown();
break;
case APP_CMD_SAVE_STATE:
// satdump::recorder_app->save_settings(); // TODOREWORK!!!!
// satdump::explorer_app->save_settings(); // TODOREWORK!!!!
satdump::satdump_cfg.saveUser();
break;
}
}
static int32_t handleInputEvent(struct android_app *app, AInputEvent *inputEvent) { return ImGui_ImplAndroid_HandleInputEvent(inputEvent); }
std::string getAppFilesDir(struct android_app *app)
{
JavaVM *java_vm = app->activity->vm;
JNIEnv *java_env = NULL;
jint jni_return = java_vm->GetEnv((void **)&java_env, JNI_VERSION_1_6);
if (jni_return == JNI_ERR)
throw std::runtime_error("Could not get JNI environement");
jni_return = java_vm->AttachCurrentThread(&java_env, NULL);
if (jni_return != JNI_OK)
throw std::runtime_error("Could not attach to thread");
jclass native_activity_clazz = java_env->GetObjectClass(app->activity->clazz);
if (native_activity_clazz == NULL)
throw std::runtime_error("Could not get MainActivity class");
jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "getAppDir", "()Ljava/lang/String;");
if (method_id == NULL)
throw std::runtime_error("Could not get methode ID");
jstring jstr = (jstring)java_env->CallObjectMethod(app->activity->clazz, method_id);
const char *_str = java_env->GetStringUTFChars(jstr, NULL);
std::string str(_str);
java_env->ReleaseStringUTFChars(jstr, _str);
jni_return = java_vm->DetachCurrentThread();
if (jni_return != JNI_OK)
throw std::runtime_error("Could not detach from thread");
return str;
}
std::string getPluginsDir(struct android_app *app)
{
JavaVM *java_vm = app->activity->vm;
JNIEnv *java_env = NULL;
jint jni_return = java_vm->GetEnv((void **)&java_env, JNI_VERSION_1_6);
if (jni_return == JNI_ERR)
throw std::runtime_error("Could not get JNI environement");
jni_return = java_vm->AttachCurrentThread(&java_env, NULL);
if (jni_return != JNI_OK)
throw std::runtime_error("Could not attach to thread");
jclass native_activity_clazz = java_env->GetObjectClass(app->activity->clazz);
if (native_activity_clazz == NULL)
throw std::runtime_error("Could not get MainActivity class");
jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "get_plugins_directory", "()Ljava/lang/String;");
if (method_id == NULL)
throw std::runtime_error("Could not get methode ID");
jstring jstr = (jstring)java_env->CallObjectMethod(app->activity->clazz, method_id);
const char *_str = java_env->GetStringUTFChars(jstr, NULL);
std::string str(_str);
java_env->ReleaseStringUTFChars(jstr, _str);
jni_return = java_vm->DetachCurrentThread();
if (jni_return != JNI_OK)
throw std::runtime_error("Could not detach from thread");
return str;
}
void android_main(struct android_app *app)
{
g_App = app;
bindImageTextureFunctions();
bindBackendFunctions();
std::string path = getAppFilesDir(app);
android_plugins_dir = getPluginsDir(app);
chdir(path.c_str());
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_pollAll(g_Initialized ? 0 : -1, NULL, &out_events, (void **)&out_data) >= 0)
{
// Process one event
if (out_data != NULL)
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
tick();
}
}
// 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 = NULL;
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, NULL);
if (jni_return != JNI_OK)
return -2;
jclass native_activity_clazz = java_env->GetObjectClass(g_App->activity->clazz);
if (native_activity_clazz == NULL)
return -3;
jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "showSoftInput", "()V");
if (method_id == NULL)
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;
}
static int HideSoftKeyboardInput()
{
JavaVM *java_vm = g_App->activity->vm;
JNIEnv *java_env = NULL;
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, NULL);
if (jni_return != JNI_OK)
return -2;
jclass native_activity_clazz = java_env->GetObjectClass(g_App->activity->clazz);
if (native_activity_clazz == NULL)
return -3;
jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "hideSoftInput", "()V");
if (method_id == NULL)
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 = NULL;
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, NULL);
if (jni_return != JNI_OK)
return -2;
jclass native_activity_clazz = java_env->GetObjectClass(g_App->activity->clazz);
if (native_activity_clazz == NULL)
return -3;
jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "pollUnicodeChar", "()I");
if (method_id == NULL)
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)
{
if (unicode_character == 0x08) // BackSpace
{
io.AddKeyEvent(ImGuiKey_Backspace, true);
io.AddKeyEvent(ImGuiKey_Backspace, false);
}
else
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;
}
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