1 files changed, 624 insertions, 0 deletions
diff --git a/backends/platform/android/jni.cpp b/backends/platform/android/jni.cpp
new file mode 100644
index 0000000000..13aef11fa2
--- /dev/null
+++ b/backends/platform/android/jni.cpp
@@ -0,0 +1,624 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#if defined(__ANDROID__)
+
+// Allow use of stuff in <time.h>
+#define FORBIDDEN_SYMBOL_EXCEPTION_time_h
+
+// Disable printf override in common/forbidden.h to avoid
+// clashes with log.h from the Android SDK.
+// That header file uses
+//   __attribute__ ((format(printf, 3, 4)))
+// which gets messed up by our override mechanism; this could
+// be avoided by either changing the Android SDK to use the equally
+// legal and valid
+//   __attribute__ ((format(printf, 3, 4)))
+// or by refining our printf override to use a varadic macro
+// (which then wouldn't be portable, though).
+// Anyway, for now we just disable the printf override globally
+// for the Android port
+#define FORBIDDEN_SYMBOL_EXCEPTION_printf
+
+#include "base/main.h"
+#include "base/version.h"
+#include "common/config-manager.h"
+#include "common/error.h"
+#include "common/textconsole.h"
+#include "engines/engine.h"
+
+#include "backends/platform/android/android.h"
+#include "backends/platform/android/asset-archive.h"
+#include "backends/platform/android/jni.h"
+
+__attribute__ ((visibility("default")))
+jint JNICALL JNI_OnLoad(JavaVM *vm, void *) {
+	return JNI::onLoad(vm);
+}
+
+JavaVM *JNI::_vm = 0;
+jobject JNI::_jobj = 0;
+jobject JNI::_jobj_audio_track = 0;
+jobject JNI::_jobj_egl = 0;
+jobject JNI::_jobj_egl_display = 0;
+jobject JNI::_jobj_egl_surface = 0;
+
+Common::Archive *JNI::_asset_archive = 0;
+OSystem_Android *JNI::_system = 0;
+
+bool JNI::pause = false;
+sem_t JNI::pause_sem = { 0 };
+
+int JNI::surface_changeid = 0;
+int JNI::egl_surface_width = 0;
+int JNI::egl_surface_height = 0;
+bool JNI::_ready_for_events = 0;
+
+jmethodID JNI::_MID_getDPI = 0;
+jmethodID JNI::_MID_displayMessageOnOSD = 0;
+jmethodID JNI::_MID_setWindowCaption = 0;
+jmethodID JNI::_MID_showVirtualKeyboard = 0;
+jmethodID JNI::_MID_getSysArchives = 0;
+jmethodID JNI::_MID_getPluginDirectories = 0;
+jmethodID JNI::_MID_initSurface = 0;
+jmethodID JNI::_MID_deinitSurface = 0;
+
+jmethodID JNI::_MID_EGL10_eglSwapBuffers = 0;
+
+jmethodID JNI::_MID_AudioTrack_flush = 0;
+jmethodID JNI::_MID_AudioTrack_pause = 0;
+jmethodID JNI::_MID_AudioTrack_play = 0;
+jmethodID JNI::_MID_AudioTrack_stop = 0;
+jmethodID JNI::_MID_AudioTrack_write = 0;
+
+const JNINativeMethod JNI::_natives[] = {
+	{ "create", "(Landroid/content/res/AssetManager;"
+				"Ljavax/microedition/khronos/egl/EGL10;"
+				"Ljavax/microedition/khronos/egl/EGLDisplay;"
+				"Landroid/media/AudioTrack;II)V",
+		(void *)JNI::create },
+	{ "destroy", "()V",
+		(void *)JNI::destroy },
+	{ "setSurface", "(II)V",
+		(void *)JNI::setSurface },
+	{ "main", "([Ljava/lang/String;)I",
+		(void *)JNI::main },
+	{ "pushEvent", "(IIIIII)V",
+		(void *)JNI::pushEvent },
+	{ "enableZoning", "(Z)V",
+		(void *)JNI::enableZoning },
+	{ "setPause", "(Z)V",
+		(void *)JNI::setPause }
+};
+
+JNI::JNI() {
+}
+
+JNI::~JNI() {
+}
+
+jint JNI::onLoad(JavaVM *vm) {
+	_vm = vm;
+
+	JNIEnv *env;
+
+	if (_vm->GetEnv((void **)&env, JNI_VERSION_1_2))
+		return JNI_ERR;
+
+	jclass cls = env->FindClass("org/inodes/gus/scummvm/ScummVM");
+	if (cls == 0)
+		return JNI_ERR;
+
+	if (env->RegisterNatives(cls, _natives, ARRAYSIZE(_natives)) < 0)
+		return JNI_ERR;
+
+	return JNI_VERSION_1_2;
+}
+
+JNIEnv *JNI::getEnv() {
+	JNIEnv *env = 0;
+
+	jint res = _vm->GetEnv((void **)&env, JNI_VERSION_1_2);
+
+	if (res != JNI_OK) {
+		LOGE("GetEnv() failed: %d", res);
+		abort();
+	}
+
+	return env;
+}
+
+void JNI::attachThread() {
+	JNIEnv *env = 0;
+
+	jint res = _vm->AttachCurrentThread(&env, 0);
+
+	if (res != JNI_OK) {
+		LOGE("AttachCurrentThread() failed: %d", res);
+		abort();
+	}
+}
+
+void JNI::detachThread() {
+	jint res = _vm->DetachCurrentThread();
+
+	if (res != JNI_OK) {
+		LOGE("DetachCurrentThread() failed: %d", res);
+		abort();
+	}
+}
+
+void JNI::setReadyForEvents(bool ready) {
+	_ready_for_events = ready;
+}
+
+void JNI::throwByName(JNIEnv *env, const char *name, const char *msg) {
+	jclass cls = env->FindClass(name);
+
+	// if cls is 0, an exception has already been thrown
+	if (cls != 0)
+		env->ThrowNew(cls, msg);
+
+	env->DeleteLocalRef(cls);
+}
+
+void JNI::throwRuntimeException(JNIEnv *env, const char *msg) {
+	throwByName(env, "java/lang/RuntimeException", msg);
+}
+
+// calls to the dark side
+
+void JNI::getDPI(float *values) {
+	values[0] = 0.0;
+	values[1] = 0.0;
+
+	JNIEnv *env = JNI::getEnv();
+
+	jfloatArray array = env->NewFloatArray(2);
+
+	env->CallVoidMethod(_jobj, _MID_getDPI, array);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Failed to get DPIs");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	} else {
+		jfloat *res = env->GetFloatArrayElements(array, 0);
+
+		if (res) {
+			values[0] = res[0];
+			values[1] = res[1];
+
+			env->ReleaseFloatArrayElements(array, res, 0);
+		}
+	}
+
+	env->DeleteLocalRef(array);
+}
+
+void JNI::displayMessageOnOSD(const char *msg) {
+	JNIEnv *env = JNI::getEnv();
+	jstring java_msg = env->NewStringUTF(msg);
+
+	env->CallVoidMethod(_jobj, _MID_displayMessageOnOSD, java_msg);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Failed to display OSD message");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+
+	env->DeleteLocalRef(java_msg);
+}
+
+void JNI::setWindowCaption(const char *caption) {
+	JNIEnv *env = JNI::getEnv();
+	jstring java_caption = env->NewStringUTF(caption);
+
+	env->CallVoidMethod(_jobj, _MID_setWindowCaption, java_caption);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Failed to set window caption");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+
+	env->DeleteLocalRef(java_caption);
+}
+
+void JNI::showVirtualKeyboard(bool enable) {
+	JNIEnv *env = JNI::getEnv();
+
+	env->CallVoidMethod(_jobj, _MID_showVirtualKeyboard, enable);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Error trying to show virtual keyboard");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+}
+
+void JNI::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {
+	JNIEnv *env = JNI::getEnv();
+
+	s.add("ASSET", _asset_archive, priority, false);
+
+	jobjectArray array =
+		(jobjectArray)env->CallObjectMethod(_jobj, _MID_getSysArchives);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Error finding system archive path");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+
+		return;
+	}
+
+	jsize size = env->GetArrayLength(array);
+	for (jsize i = 0; i < size; ++i) {
+		jstring path_obj = (jstring)env->GetObjectArrayElement(array, i);
+		const char *path = env->GetStringUTFChars(path_obj, 0);
+
+		if (path != 0) {
+			s.addDirectory(path, path, priority);
+			env->ReleaseStringUTFChars(path_obj, path);
+		}
+
+		env->DeleteLocalRef(path_obj);
+	}
+}
+
+void JNI::getPluginDirectories(Common::FSList &dirs) {
+	JNIEnv *env = JNI::getEnv();
+
+	jobjectArray array =
+		(jobjectArray)env->CallObjectMethod(_jobj, _MID_getPluginDirectories);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Error finding plugin directories");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+
+		return;
+	}
+
+	jsize size = env->GetArrayLength(array);
+	for (jsize i = 0; i < size; ++i) {
+		jstring path_obj = (jstring)env->GetObjectArrayElement(array, i);
+
+		if (path_obj == 0)
+			continue;
+
+		const char *path = env->GetStringUTFChars(path_obj, 0);
+
+		if (path == 0) {
+			LOGE("Error getting string characters from plugin directory");
+
+			env->ExceptionClear();
+			env->DeleteLocalRef(path_obj);
+
+			continue;
+		}
+
+		dirs.push_back(Common::FSNode(path));
+
+		env->ReleaseStringUTFChars(path_obj, path);
+		env->DeleteLocalRef(path_obj);
+	}
+}
+
+bool JNI::initSurface() {
+	JNIEnv *env = JNI::getEnv();
+
+	jobject obj = env->CallObjectMethod(_jobj, _MID_initSurface);
+
+	if (!obj || env->ExceptionCheck()) {
+		LOGE("initSurface failed");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+
+		return false;
+	}
+
+	_jobj_egl_surface = env->NewGlobalRef(obj);
+
+	return true;
+}
+
+void JNI::deinitSurface() {
+	JNIEnv *env = JNI::getEnv();
+
+	env->CallVoidMethod(_jobj, _MID_deinitSurface);
+
+	if (env->ExceptionCheck()) {
+		LOGE("deinitSurface failed");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+
+	env->DeleteGlobalRef(_jobj_egl_surface);
+	_jobj_egl_surface = 0;
+}
+
+void JNI::setAudioPause() {
+	JNIEnv *env = JNI::getEnv();
+
+	env->CallVoidMethod(_jobj_audio_track, _MID_AudioTrack_flush);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Error flushing AudioTrack");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+
+	env->CallVoidMethod(_jobj_audio_track, _MID_AudioTrack_pause);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Error setting AudioTrack: pause");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+}
+
+void JNI::setAudioPlay() {
+	JNIEnv *env = JNI::getEnv();
+
+	env->CallVoidMethod(_jobj_audio_track, _MID_AudioTrack_play);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Error setting AudioTrack: play");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+}
+
+void JNI::setAudioStop() {
+	JNIEnv *env = JNI::getEnv();
+
+	env->CallVoidMethod(_jobj_audio_track, _MID_AudioTrack_stop);
+
+	if (env->ExceptionCheck()) {
+		LOGE("Error setting AudioTrack: stop");
+
+		env->ExceptionDescribe();
+		env->ExceptionClear();
+	}
+}
+
+// natives for the dark side
+
+void JNI::create(JNIEnv *env, jobject self, jobject asset_manager,
+				jobject egl, jobject egl_display,
+				jobject at, jint audio_sample_rate, jint audio_buffer_size) {
+	LOGI(gScummVMFullVersion);
+
+	assert(!_system);
+
+	pause = false;
+	// initial value of zero!
+	sem_init(&pause_sem, 0, 0);
+
+	_asset_archive = new AndroidAssetArchive(asset_manager);
+	assert(_asset_archive);
+
+	_system = new OSystem_Android(audio_sample_rate, audio_buffer_size);
+	assert(_system);
+
+	// weak global ref to allow class to be unloaded
+	// ... except dalvik implements NewWeakGlobalRef only on froyo
+	//_jobj = env->NewWeakGlobalRef(self);
+
+	_jobj = env->NewGlobalRef(self);
+
+	jclass cls = env->GetObjectClass(_jobj);
+
+#define FIND_METHOD(prefix, name, signature) do {							\
+		_MID_ ## prefix ## name = env->GetMethodID(cls, #name, signature);	\
+		if (_MID_ ## prefix ## name == 0)									\
+			return;															\
+	} while (0)
+
+	FIND_METHOD(, setWindowCaption, "(Ljava/lang/String;)V");
+	FIND_METHOD(, getDPI, "([F)V");
+	FIND_METHOD(, displayMessageOnOSD, "(Ljava/lang/String;)V");
+	FIND_METHOD(, showVirtualKeyboard, "(Z)V");
+	FIND_METHOD(, getSysArchives, "()[Ljava/lang/String;");
+	FIND_METHOD(, getPluginDirectories, "()[Ljava/lang/String;");
+	FIND_METHOD(, initSurface, "()Ljavax/microedition/khronos/egl/EGLSurface;");
+	FIND_METHOD(, deinitSurface, "()V");
+
+	_jobj_egl = env->NewGlobalRef(egl);
+	_jobj_egl_display = env->NewGlobalRef(egl_display);
+
+	cls = env->GetObjectClass(_jobj_egl);
+
+	FIND_METHOD(EGL10_, eglSwapBuffers,
+				"(Ljavax/microedition/khronos/egl/EGLDisplay;"
+				"Ljavax/microedition/khronos/egl/EGLSurface;)Z");
+
+	_jobj_audio_track = env->NewGlobalRef(at);
+
+	cls = env->GetObjectClass(_jobj_audio_track);
+
+	FIND_METHOD(AudioTrack_, flush, "()V");
+	FIND_METHOD(AudioTrack_, pause, "()V");
+	FIND_METHOD(AudioTrack_, play, "()V");
+	FIND_METHOD(AudioTrack_, stop, "()V");
+	FIND_METHOD(AudioTrack_, write, "([BII)I");
+
+#undef FIND_METHOD
+
+	g_system = _system;
+}
+
+void JNI::destroy(JNIEnv *env, jobject self) {
+	delete _asset_archive;
+	_asset_archive = 0;
+
+	delete _system;
+	g_system = 0;
+	_system = 0;
+
+	sem_destroy(&pause_sem);
+
+	// see above
+	//JNI::getEnv()->DeleteWeakGlobalRef(_jobj);
+
+	JNI::getEnv()->DeleteGlobalRef(_jobj_egl_display);
+	JNI::getEnv()->DeleteGlobalRef(_jobj_egl);
+	JNI::getEnv()->DeleteGlobalRef(_jobj_audio_track);
+	JNI::getEnv()->DeleteGlobalRef(_jobj);
+}
+
+void JNI::setSurface(JNIEnv *env, jobject self, jint width, jint height) {
+	egl_surface_width = width;
+	egl_surface_height = height;
+	surface_changeid++;
+}
+
+jint JNI::main(JNIEnv *env, jobject self, jobjectArray args) {
+	assert(_system);
+
+	const int MAX_NARGS = 32;
+	int res = -1;
+
+	int argc = env->GetArrayLength(args);
+	if (argc > MAX_NARGS) {
+		throwByName(env, "java/lang/IllegalArgumentException",
+					"too many arguments");
+		return 0;
+	}
+
+	char *argv[MAX_NARGS];
+
+	// note use in cleanup loop below
+	int nargs;
+
+	for (nargs = 0; nargs < argc; ++nargs) {
+		jstring arg = (jstring)env->GetObjectArrayElement(args, nargs);
+
+		if (arg == 0) {
+			argv[nargs] = 0;
+		} else {
+			const char *cstr = env->GetStringUTFChars(arg, 0);
+
+			argv[nargs] = const_cast<char *>(cstr);
+
+			// exception already thrown?
+			if (cstr == 0)
+				goto cleanup;
+		}
+
+		env->DeleteLocalRef(arg);
+	}
+
+#ifdef DYNAMIC_MODULES
+	PluginManager::instance().addPluginProvider(new AndroidPluginProvider());
+#endif
+
+	LOGI("Entering scummvm_main with %d args", argc);
+
+	res = scummvm_main(argc, argv);
+
+	LOGI("scummvm_main exited with code %d", res);
+
+	_system->quit();
+
+cleanup:
+	nargs--;
+
+	for (int i = 0; i < nargs; ++i) {
+		if (argv[i] == 0)
+			continue;
+
+		jstring arg = (jstring)env->GetObjectArrayElement(args, nargs);
+
+		// Exception already thrown?
+		if (arg == 0)
+			return res;
+
+		env->ReleaseStringUTFChars(arg, argv[i]);
+		env->DeleteLocalRef(arg);
+	}
+
+	return res;
+}
+
+void JNI::pushEvent(JNIEnv *env, jobject self, int type, int arg1, int arg2,
+					int arg3, int arg4, int arg5) {
+	// drop events until we're ready and after we quit
+	if (!_ready_for_events) {
+		LOGW("dropping event");
+		return;
+	}
+
+	assert(_system);
+
+	_system->pushEvent(type, arg1, arg2, arg3, arg4, arg5);
+}
+
+void JNI::enableZoning(JNIEnv *env, jobject self, jboolean enable) {
+	assert(_system);
+
+	_system->enableZoning(enable);
+}
+
+void JNI::setPause(JNIEnv *env, jobject self, jboolean value) {
+	if (!_system)
+		return;
+
+	if (g_engine) {
+		LOGD("pauseEngine: %d", value);
+
+		g_engine->pauseEngine(value);
+
+		if (value &&
+				g_engine->hasFeature(Engine::kSupportsSavingDuringRuntime) &&
+				g_engine->canSaveGameStateCurrently())
+			g_engine->saveGameState(0, "Android parachute");
+	}
+
+	pause = value;
+
+	if (!pause) {
+		// wake up all threads
+		for (uint i = 0; i < 3; ++i)
+			sem_post(&pause_sem);
+	}
+}
+
+#endif
+