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bgfx/3rdparty/native_app_glue/android_native_app_glue.c
Michał Cichoń 04732d89e3
Android NDK update, bgfx side (#2960) 
* Android: Add local copy of native_app_glue, patched to compile as C++.

* Android: List android-x86_64 configuration in makefile

* Android: Build shared-lib and examples by default

* Docs: Update Android build prerequisites

* CI: Add Android builds

* CI: **DO NOT MERGE** pick bx/PR with android support update
2022-10-22 12:02:34 -07:00

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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "android_native_app_glue.h"
#include <jni.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <android/log.h>
#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "threaded_app", __VA_ARGS__))
#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, "threaded_app", __VA_ARGS__))
/* For debug builds, always enable the debug traces in this library */
#ifndef NDEBUG
# define LOGV(...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, "threaded_app", __VA_ARGS__))
#else
# define LOGV(...) ((void)0)
#endif
static void free_saved_state(struct android_app* android_app) {
pthread_mutex_lock(&android_app->mutex);
if (android_app->savedState != NULL) {
free(android_app->savedState);
android_app->savedState = NULL;
android_app->savedStateSize = 0;
}
pthread_mutex_unlock(&android_app->mutex);
}
int8_t android_app_read_cmd(struct android_app* android_app) {
int8_t cmd;
if (read(android_app->msgread, &cmd, sizeof(cmd)) != sizeof(cmd)) {
LOGE("No data on command pipe!");
return -1;
}
if (cmd == APP_CMD_SAVE_STATE) free_saved_state(android_app);
return cmd;
}
static void print_cur_config(struct android_app* android_app) {
char lang[2], country[2];
AConfiguration_getLanguage(android_app->config, lang);
AConfiguration_getCountry(android_app->config, country);
LOGV("Config: mcc=%d mnc=%d lang=%c%c cnt=%c%c orien=%d touch=%d dens=%d "
"keys=%d nav=%d keysHid=%d navHid=%d sdk=%d size=%d long=%d "
"modetype=%d modenight=%d",
AConfiguration_getMcc(android_app->config),
AConfiguration_getMnc(android_app->config),
lang[0], lang[1], country[0], country[1],
AConfiguration_getOrientation(android_app->config),
AConfiguration_getTouchscreen(android_app->config),
AConfiguration_getDensity(android_app->config),
AConfiguration_getKeyboard(android_app->config),
AConfiguration_getNavigation(android_app->config),
AConfiguration_getKeysHidden(android_app->config),
AConfiguration_getNavHidden(android_app->config),
AConfiguration_getSdkVersion(android_app->config),
AConfiguration_getScreenSize(android_app->config),
AConfiguration_getScreenLong(android_app->config),
AConfiguration_getUiModeType(android_app->config),
AConfiguration_getUiModeNight(android_app->config));
}
void android_app_pre_exec_cmd(struct android_app* android_app, int8_t cmd) {
switch (cmd) {
case APP_CMD_INPUT_CHANGED:
LOGV("APP_CMD_INPUT_CHANGED");
pthread_mutex_lock(&android_app->mutex);
if (android_app->inputQueue != NULL) {
AInputQueue_detachLooper(android_app->inputQueue);
}
android_app->inputQueue = android_app->pendingInputQueue;
if (android_app->inputQueue != NULL) {
LOGV("Attaching input queue to looper");
AInputQueue_attachLooper(android_app->inputQueue,
android_app->looper, LOOPER_ID_INPUT, NULL,
&android_app->inputPollSource);
}
pthread_cond_broadcast(&android_app->cond);
pthread_mutex_unlock(&android_app->mutex);
break;
case APP_CMD_INIT_WINDOW:
LOGV("APP_CMD_INIT_WINDOW");
pthread_mutex_lock(&android_app->mutex);
android_app->window = android_app->pendingWindow;
pthread_cond_broadcast(&android_app->cond);
pthread_mutex_unlock(&android_app->mutex);
break;
case APP_CMD_TERM_WINDOW:
LOGV("APP_CMD_TERM_WINDOW");
pthread_cond_broadcast(&android_app->cond);
break;
case APP_CMD_RESUME:
case APP_CMD_START:
case APP_CMD_PAUSE:
case APP_CMD_STOP:
LOGV("activityState=%d", cmd);
pthread_mutex_lock(&android_app->mutex);
android_app->activityState = cmd;
pthread_cond_broadcast(&android_app->cond);
pthread_mutex_unlock(&android_app->mutex);
break;
case APP_CMD_CONFIG_CHANGED:
LOGV("APP_CMD_CONFIG_CHANGED");
AConfiguration_fromAssetManager(android_app->config,
android_app->activity->assetManager);
print_cur_config(android_app);
break;
case APP_CMD_DESTROY:
LOGV("APP_CMD_DESTROY");
android_app->destroyRequested = 1;
break;
}
}
void android_app_post_exec_cmd(struct android_app* android_app, int8_t cmd) {
switch (cmd) {
case APP_CMD_TERM_WINDOW:
LOGV("APP_CMD_TERM_WINDOW");
pthread_mutex_lock(&android_app->mutex);
android_app->window = NULL;
pthread_cond_broadcast(&android_app->cond);
pthread_mutex_unlock(&android_app->mutex);
break;
case APP_CMD_SAVE_STATE:
LOGV("APP_CMD_SAVE_STATE");
pthread_mutex_lock(&android_app->mutex);
android_app->stateSaved = 1;
pthread_cond_broadcast(&android_app->cond);
pthread_mutex_unlock(&android_app->mutex);
break;
case APP_CMD_RESUME:
free_saved_state(android_app);
break;
}
}
void app_dummy() {
}
static void android_app_destroy(struct android_app* android_app) {
LOGV("android_app_destroy!");
free_saved_state(android_app);
pthread_mutex_lock(&android_app->mutex);
if (android_app->inputQueue != NULL) {
AInputQueue_detachLooper(android_app->inputQueue);
}
AConfiguration_delete(android_app->config);
android_app->destroyed = 1;
pthread_cond_broadcast(&android_app->cond);
pthread_mutex_unlock(&android_app->mutex);
// Can't touch android_app object after this.
}
static void process_input(struct android_app* app, struct android_poll_source* source) {
AInputEvent* event = NULL;
while (AInputQueue_getEvent(app->inputQueue, &event) >= 0) {
LOGV("New input event: type=%d", AInputEvent_getType(event));
if (AInputQueue_preDispatchEvent(app->inputQueue, event)) {
continue;
}
int32_t handled = 0;
if (app->onInputEvent != NULL) handled = app->onInputEvent(app, event);
AInputQueue_finishEvent(app->inputQueue, event, handled);
}
}
static void process_cmd(struct android_app* app, struct android_poll_source* source) {
int8_t cmd = android_app_read_cmd(app);
android_app_pre_exec_cmd(app, cmd);
if (app->onAppCmd != NULL) app->onAppCmd(app, cmd);
android_app_post_exec_cmd(app, cmd);
}
static void* android_app_entry(void* param) {
struct android_app* android_app = (struct android_app*)param;
android_app->config = AConfiguration_new();
AConfiguration_fromAssetManager(android_app->config, android_app->activity->assetManager);
print_cur_config(android_app);
android_app->cmdPollSource.id = LOOPER_ID_MAIN;
android_app->cmdPollSource.app = android_app;
android_app->cmdPollSource.process = process_cmd;
android_app->inputPollSource.id = LOOPER_ID_INPUT;
android_app->inputPollSource.app = android_app;
android_app->inputPollSource.process = process_input;
ALooper* looper = ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS);
ALooper_addFd(looper, android_app->msgread, LOOPER_ID_MAIN, ALOOPER_EVENT_INPUT, NULL,
&android_app->cmdPollSource);
android_app->looper = looper;
pthread_mutex_lock(&android_app->mutex);
android_app->running = 1;
pthread_cond_broadcast(&android_app->cond);
pthread_mutex_unlock(&android_app->mutex);
android_main(android_app);
android_app_destroy(android_app);
return NULL;
}
// --------------------------------------------------------------------
// Native activity interaction (called from main thread)
// --------------------------------------------------------------------
static struct android_app* android_app_create(ANativeActivity* activity,
void* savedState, size_t savedStateSize) {
struct android_app* android_app = (struct android_app*)calloc(1, sizeof(struct android_app));
android_app->activity = activity;
pthread_mutex_init(&android_app->mutex, NULL);
pthread_cond_init(&android_app->cond, NULL);
if (savedState != NULL) {
android_app->savedState = malloc(savedStateSize);
android_app->savedStateSize = savedStateSize;
memcpy(android_app->savedState, savedState, savedStateSize);
}
int msgpipe[2];
if (pipe(msgpipe)) {
LOGE("could not create pipe: %s", strerror(errno));
return NULL;
}
android_app->msgread = msgpipe[0];
android_app->msgwrite = msgpipe[1];
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_create(&android_app->thread, &attr, android_app_entry, android_app);
// Wait for thread to start.
pthread_mutex_lock(&android_app->mutex);
while (!android_app->running) {
pthread_cond_wait(&android_app->cond, &android_app->mutex);
}
pthread_mutex_unlock(&android_app->mutex);
return android_app;
}
static void android_app_write_cmd(struct android_app* android_app, int8_t cmd) {
if (write(android_app->msgwrite, &cmd, sizeof(cmd)) != sizeof(cmd)) {
LOGE("Failure writing android_app cmd: %s", strerror(errno));
}
}
static void android_app_set_input(struct android_app* android_app, AInputQueue* inputQueue) {
pthread_mutex_lock(&android_app->mutex);
android_app->pendingInputQueue = inputQueue;
android_app_write_cmd(android_app, APP_CMD_INPUT_CHANGED);
while (android_app->inputQueue != android_app->pendingInputQueue) {
pthread_cond_wait(&android_app->cond, &android_app->mutex);
}
pthread_mutex_unlock(&android_app->mutex);
}
static void android_app_set_window(struct android_app* android_app, ANativeWindow* window) {
pthread_mutex_lock(&android_app->mutex);
if (android_app->pendingWindow != NULL) {
android_app_write_cmd(android_app, APP_CMD_TERM_WINDOW);
}
android_app->pendingWindow = window;
if (window != NULL) {
android_app_write_cmd(android_app, APP_CMD_INIT_WINDOW);
}
while (android_app->window != android_app->pendingWindow) {
pthread_cond_wait(&android_app->cond, &android_app->mutex);
}
pthread_mutex_unlock(&android_app->mutex);
}
static void android_app_set_activity_state(struct android_app* android_app, int8_t cmd) {
pthread_mutex_lock(&android_app->mutex);
android_app_write_cmd(android_app, cmd);
while (android_app->activityState != cmd) {
pthread_cond_wait(&android_app->cond, &android_app->mutex);
}
pthread_mutex_unlock(&android_app->mutex);
}
static void android_app_free(struct android_app* android_app) {
pthread_mutex_lock(&android_app->mutex);
android_app_write_cmd(android_app, APP_CMD_DESTROY);
while (!android_app->destroyed) {
pthread_cond_wait(&android_app->cond, &android_app->mutex);
}
pthread_mutex_unlock(&android_app->mutex);
close(android_app->msgread);
close(android_app->msgwrite);
pthread_cond_destroy(&android_app->cond);
pthread_mutex_destroy(&android_app->mutex);
free(android_app);
}
static struct android_app* ToApp(ANativeActivity* activity) {
return (struct android_app*) activity->instance;
}
static void onDestroy(ANativeActivity* activity) {
LOGV("Destroy: %p", activity);
android_app_free(ToApp(activity));
}
static void onStart(ANativeActivity* activity) {
LOGV("Start: %p", activity);
android_app_set_activity_state(ToApp(activity), APP_CMD_START);
}
static void onResume(ANativeActivity* activity) {
LOGV("Resume: %p", activity);
android_app_set_activity_state(ToApp(activity), APP_CMD_RESUME);
}
static void* onSaveInstanceState(ANativeActivity* activity, size_t* outLen) {
LOGV("SaveInstanceState: %p", activity);
struct android_app* android_app = ToApp(activity);
void* savedState = NULL;
pthread_mutex_lock(&android_app->mutex);
android_app->stateSaved = 0;
android_app_write_cmd(android_app, APP_CMD_SAVE_STATE);
while (!android_app->stateSaved) {
pthread_cond_wait(&android_app->cond, &android_app->mutex);
}
if (android_app->savedState != NULL) {
savedState = android_app->savedState;
*outLen = android_app->savedStateSize;
android_app->savedState = NULL;
android_app->savedStateSize = 0;
}
pthread_mutex_unlock(&android_app->mutex);
return savedState;
}
static void onPause(ANativeActivity* activity) {
LOGV("Pause: %p", activity);
android_app_set_activity_state(ToApp(activity), APP_CMD_PAUSE);
}
static void onStop(ANativeActivity* activity) {
LOGV("Stop: %p", activity);
android_app_set_activity_state(ToApp(activity), APP_CMD_STOP);
}
static void onConfigurationChanged(ANativeActivity* activity) {
LOGV("ConfigurationChanged: %p", activity);
android_app_write_cmd(ToApp(activity), APP_CMD_CONFIG_CHANGED);
}
static void onContentRectChanged(ANativeActivity* activity, const ARect* r) {
LOGV("ContentRectChanged: l=%d,t=%d,r=%d,b=%d", r->left, r->top, r->right, r->bottom);
struct android_app* android_app = ToApp(activity);
pthread_mutex_lock(&android_app->mutex);
android_app->contentRect = *r;
pthread_mutex_unlock(&android_app->mutex);
android_app_write_cmd(ToApp(activity), APP_CMD_CONTENT_RECT_CHANGED);
}
static void onLowMemory(ANativeActivity* activity) {
LOGV("LowMemory: %p", activity);
android_app_write_cmd(ToApp(activity), APP_CMD_LOW_MEMORY);
}
static void onWindowFocusChanged(ANativeActivity* activity, int focused) {
LOGV("WindowFocusChanged: %p -- %d", activity, focused);
android_app_write_cmd(ToApp(activity), focused ? APP_CMD_GAINED_FOCUS : APP_CMD_LOST_FOCUS);
}
static void onNativeWindowCreated(ANativeActivity* activity, ANativeWindow* window) {
LOGV("NativeWindowCreated: %p -- %p", activity, window);
android_app_set_window(ToApp(activity), window);
}
static void onNativeWindowDestroyed(ANativeActivity* activity, ANativeWindow* window) {
LOGV("NativeWindowDestroyed: %p -- %p", activity, window);
android_app_set_window(ToApp(activity), NULL);
}
static void onNativeWindowRedrawNeeded(ANativeActivity* activity, ANativeWindow* window) {
LOGV("NativeWindowRedrawNeeded: %p -- %p", activity, window);
android_app_write_cmd(ToApp(activity), APP_CMD_WINDOW_REDRAW_NEEDED);
}
static void onNativeWindowResized(ANativeActivity* activity, ANativeWindow* window) {
LOGV("NativeWindowResized: %p -- %p", activity, window);
android_app_write_cmd(ToApp(activity), APP_CMD_WINDOW_RESIZED);
}
static void onInputQueueCreated(ANativeActivity* activity, AInputQueue* queue) {
LOGV("InputQueueCreated: %p -- %p", activity, queue);
android_app_set_input(ToApp(activity), queue);
}
static void onInputQueueDestroyed(ANativeActivity* activity, AInputQueue* queue) {
LOGV("InputQueueDestroyed: %p -- %p", activity, queue);
android_app_set_input(ToApp(activity), NULL);
}
JNIEXPORT
void ANativeActivity_onCreate(ANativeActivity* activity, void* savedState, size_t savedStateSize) {
LOGV("Creating: %p", activity);
activity->callbacks->onConfigurationChanged = onConfigurationChanged;
activity->callbacks->onContentRectChanged = onContentRectChanged;
activity->callbacks->onDestroy = onDestroy;
activity->callbacks->onInputQueueCreated = onInputQueueCreated;
activity->callbacks->onInputQueueDestroyed = onInputQueueDestroyed;
activity->callbacks->onLowMemory = onLowMemory;
activity->callbacks->onNativeWindowCreated = onNativeWindowCreated;
activity->callbacks->onNativeWindowDestroyed = onNativeWindowDestroyed;
activity->callbacks->onNativeWindowRedrawNeeded = onNativeWindowRedrawNeeded;
activity->callbacks->onNativeWindowResized = onNativeWindowResized;
activity->callbacks->onPause = onPause;
activity->callbacks->onResume = onResume;
activity->callbacks->onSaveInstanceState = onSaveInstanceState;
activity->callbacks->onStart = onStart;
activity->callbacks->onStop = onStop;
activity->callbacks->onWindowFocusChanged = onWindowFocusChanged;
activity->instance = android_app_create(activity, savedState, savedStateSize);
}
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