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jni.h

/* 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.
 *
 * $URL$
 * $Id$
 *
 */

#ifndef _ANDROID_JNI_H_
#define _ANDROID_JNI_H_

#if defined(__ANDROID__)

#include <jni.h>
#include <semaphore.h>

#include "common/fs.h"
#include "common/archive.h"

class OSystem_Android;

class JNI {
private:
      JNI();
      virtual ~JNI();

public:
      static bool pause;
      static sem_t pause_sem;

      static int surface_changeid;
      static int egl_surface_width;
      static int egl_surface_height;

      static jint onLoad(JavaVM *vm);

      static JNIEnv *getEnv();

      static void attachThread();
      static void detachThread();

      static void setReadyForEvents(bool ready);

      static void getPluginDirectories(Common::FSList &dirs);
      static void setWindowCaption(const char *caption);
      static void getDPI(float *values);
      static void displayMessageOnOSD(const char *msg);
      static void showVirtualKeyboard(bool enable);
      static void addSysArchivesToSearchSet(Common::SearchSet &s, int priority);

      static inline bool haveSurface();
      static inline bool swapBuffers();
      static bool initSurface();
      static void deinitSurface();

      static void setAudioPause();
      static void setAudioPlay();
      static void setAudioStop();

      static inline int writeAudio(JNIEnv *env, jbyteArray &data, int offset,
                                                      int size);

private:
      static JavaVM *_vm;
      // back pointer to (java) peer instance
      static jobject _jobj;
      static jobject _jobj_audio_track;
      static jobject _jobj_egl;
      static jobject _jobj_egl_display;
      static jobject _jobj_egl_surface;

      static Common::Archive *_asset_archive;
      static OSystem_Android *_system;

      static bool _ready_for_events;

      static jmethodID _MID_getDPI;
      static jmethodID _MID_displayMessageOnOSD;
      static jmethodID _MID_setWindowCaption;
      static jmethodID _MID_showVirtualKeyboard;
      static jmethodID _MID_getSysArchives;
      static jmethodID _MID_getPluginDirectories;
      static jmethodID _MID_initSurface;
      static jmethodID _MID_deinitSurface;

      static jmethodID _MID_EGL10_eglSwapBuffers;

      static jmethodID _MID_AudioTrack_flush;
      static jmethodID _MID_AudioTrack_pause;
      static jmethodID _MID_AudioTrack_play;
      static jmethodID _MID_AudioTrack_stop;
      static jmethodID _MID_AudioTrack_write;

      static const JNINativeMethod _natives[];

      static void throwByName(JNIEnv *env, const char *name, const char *msg);
      static void throwRuntimeException(JNIEnv *env, const char *msg);

      // natives for the dark side
      static void create(JNIEnv *env, jobject self, jobject asset_manager,
                                    jobject egl, jobject egl_display,
                                    jobject at, jint audio_sample_rate,
                                    jint audio_buffer_size);
      static void destroy(JNIEnv *env, jobject self);

      static void setSurface(JNIEnv *env, jobject self, jint width, jint height);
      static jint main(JNIEnv *env, jobject self, jobjectArray args);

      static void pushEvent(JNIEnv *env, jobject self, int type, int arg1,
                                          int arg2, int arg3, int arg4, int arg5);
      static void enableZoning(JNIEnv *env, jobject self, jboolean enable);

      static void setPause(JNIEnv *env, jobject self, jboolean value);
};

inline bool JNI::haveSurface() {
      return _jobj_egl_surface != 0;
}

inline bool JNI::swapBuffers() {
      JNIEnv *env = JNI::getEnv();

      return env->CallBooleanMethod(_jobj_egl, _MID_EGL10_eglSwapBuffers,
                                                      _jobj_egl_display, _jobj_egl_surface);
}

inline int JNI::writeAudio(JNIEnv *env, jbyteArray &data, int offset, int size) {
      return env->CallIntMethod(_jobj_audio_track, _MID_AudioTrack_write, data,
                                                offset, size);
}

#endif
#endif


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