Work on making a proper event loop and implementing more of the engine

1 files changed, 131 insertions, 1 deletions

diff --git a/jni/main.c b/jni/main.c
index f309e64..12ed679 100644
--- a/jni/main.c
+++ b/jni/main.c
@@ -1,17 +1,147 @@
 #include <android_native_app_glue.h>
 #include <android/log.h>
+#include <android/sensor.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <string.h>
+#include <android/native_window.h>
+#include <android/set_abort_message.h>
+#include <android/choreographer.h>
+#include <android/hardware_buffer.h>
+#include <time.h>
+
+#define LOG_TAG "moku"
+
+#define _LOG(priority, fmt, ...)                    \
+  ((void)__android_log_print((priority), (LOG_TAG), \
+                             (fmt)__VA_OPT__(, ) __VA_ARGS__))
+
+#define LOGE(fmt, ...) _LOG(ANDROID_LOG_ERROR, (fmt)__VA_OPT__(, ) __VA_ARGS__)
+#define LOGW(fmt, ...) _LOG(ANDROID_LOG_WARN, (fmt)__VA_OPT__(, ) __VA_ARGS__)
+#define LOGI(fmt, ...) _LOG(ANDROID_LOG_INFO, (fmt)__VA_OPT__(, ) __VA_ARGS__)
+
+enum Color {
+	COLOR_RED = 0x000000ff,
+	COLOR_GREEN = 0x0000ff00,
+	COLOR_BLUE = 0x00ff0000
+};
+
+struct engine {
+	struct android_app *app;
+	int window_initialized;
+	int running;
+	int color;
+	uint64_t last_update;
+};
+
+struct engine *engine_new(struct android_app* app) {
+	struct engine engine;
+
+	memset(&engine, 0, sizeof(engine));
+	engine.window_initialized = 0;
+	engine.app = app;
+	engine.running = 0;
+	engine.color = 0;
+	engine.last_update = (uint64_t)0;
+}
+
+uint64_t get_timestamp_ns() {
+	struct timespec ts;
+	clock_gettime(CLOCK_REALTIME, &ts);
+	return (uint64_t)ts.tv_nsec + (uint64_t)ts.tv_sec * 1000000000;
+}
+
+static void engine_schedule_tick(struct engine *engine);
+
+static void engine_real_tick(struct engine *engine) {
+	if (!engine->running) return;
+
+	engine_schedule_tick(engine);
+}
+
+static void engine_tick(long frameTimeNanos, void *data) {
+	struct engine *engine;
+
+	if (!data) return;
+	engine = (struct engine*)data;
+
+	engine_real_tick(engine);
+}
+
+static void engine_schedule_tick(struct engine *engine) {
+	AChoreographer_postFrameCallback(AChoreographer_getInstance(), engine_tick, (void*)engine);
+}
+
+/* TODO implement these stubs */
+void engine_attach_window(struct engine *engine) {
+	if (ANativeWindow_setBuffersGeometry(engine->app->window, 0, 0, AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM) < 0) {
+		engine->window_initialized = 0;
+		return;
+	}
+	engine->window_initialized = 1;	
+	engine->color = COLOR_RED;
+	engine->last_update = get_timestamp_ns();
+};
+
+void engine_detach_window(struct engine *engine) {
+	/* Called when native window for app is destroyed. 
+	 * Doesn't mean app is being killed, also happens on rotate
+	 * Normally, with a traditional OpenGL app, do cleanup here
+	 * At the moment, it's fine to just set a flag to disable the rendering loop
+	 */
+	engine->window_initialized = 0;
+};
+
+void engine_resume(struct engine *engine) { 
+	if (!engine->running) {
+		engine->running = 1;
+		engine_schedule_tick(engine);
+	}
+};
+
+
+void engine_pause(struct engine *engine) {
+	
+};
+
+static void engine_handle_cmd(struct android_app *app, int32_t cmd) {
+	struct engine *engine;
+
+	engine = (struct engine *)app->userData;
+
+	switch (cmd) {
+		case APP_CMD_INIT_WINDOW:
+			engine_attach_window(engine);
+			break;
+		case APP_CMD_TERM_WINDOW:
+			engine_detach_window(engine);
+			break;
+		case APP_CMD_GAINED_FOCUS:
+			engine_resume(engine);
+			break;
+		case APP_CMD_LOST_FOCUS:
+			engine_pause(engine);
+			break;
+	}
+}
 
 void android_main(struct android_app *state) {
 	/* Declarations */
 	struct android_poll_source *source;
+	struct engine engine;
 	int events;
 
 	/* Code starts here */
 	app_dummy(); 
 
+	memset(&engine, 0, sizeof(engine));
+	state->userData = &engine;
+	state->onAppCmd = engine_handle_cmd;
+
 	/* do stuff here */
 	
-	while (1) {
+	while (!state->destroyRequested) {
 		if (ALooper_pollAll(-1, NULL, &events, (void**)&source) >= 0) {
 			if (source) {
 				source->process(state, source);