jni-android.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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef _ANDROID_JNI_H_
#define _ANDROID_JNI_H_

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

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

namespace Graphics {
    struct Surface;
}

class OSystem_Android;

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

public:
    static bool assets_updated;

    static bool pause;
    static sem_t pause_sem;

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

    static bool virt_keyboard_state;

    static int32 gestures_insets[4];
    static int32 cutout_insets[4];

    static jint onLoad(JavaVM *vm);

    static inline JNIEnv *getEnv() {
        JNIEnv *env = (JNIEnv*) pthread_getspecific(_env_tls);
        if (env != nullptr) {
            return env;
        }

        return fetchEnv();
    }

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

    static void setReadyForEvents(bool ready);
    static void wakeupForQuit();

    static void setWindowCaption(const Common::U32String &caption);

    typedef float DPIValues[3];
    static void getDPI(DPIValues &values);
    static void displayMessageOnOSD(const Common::U32String &msg);
    static bool openUrl(const Common::String &url);
    static bool hasTextInClipboard();
    static Common::U32String getTextFromClipboard();
    static bool setTextInClipboard(const Common::U32String &text);
    static bool isConnectionLimited();
    static void showVirtualKeyboard(bool enable);
    static void showOnScreenControls(int enableMask);
    static void setTouchMode(int touchMode);
    static int getTouchMode();
    static void setOrientation(int touchMode);
    static void addSysArchivesToSearchSet(Common::SearchSet &s, int priority);
    static Common::String getScummVMBasePath();
    static Common::String getScummVMAssetsPath();
    static Common::String getScummVMConfigPath();
    static Common::String getScummVMLogPath();
    static jint getAndroidSDKVersionId();
    static void setCurrentGame(const Common::String &target);

    static inline bool haveSurface();
    static inline bool swapBuffers();
    static bool initSurface();
    static void deinitSurface();
    static int eglVersion() {
        if (_egl_version) {
            return _egl_version;
        }
        return fetchEGLVersion();
    }

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

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

    static Common::Array<Common::String> getAllStorageLocations();

    static jobject getNewSAFTree(bool writable, const Common::String &initURI, const Common::String &prompt);
    static Common::Array<jobject> getSAFTrees();
    static jobject findSAFTree(const Common::String &name);

    static int exportBackup(const Common::U32String &prompt);
    static int importBackup(const Common::U32String &prompt, const Common::String &path);

private:
    static pthread_key_t _env_tls;

    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;
    // cached EGL version
    static int _egl_version;

    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_openUrl;
    static jmethodID _MID_hasTextInClipboard;
    static jmethodID _MID_getTextFromClipboard;
    static jmethodID _MID_setTextInClipboard;
    static jmethodID _MID_isConnectionLimited;
    static jmethodID _MID_setWindowCaption;
    static jmethodID _MID_showVirtualKeyboard;
    static jmethodID _MID_showOnScreenControls;
    static jmethodID _MID_setTouchMode;
    static jmethodID _MID_getTouchMode;
    static jmethodID _MID_setOrientation;
    static jmethodID _MID_getScummVMBasePath;
    static jmethodID _MID_getScummVMConfigPath;
    static jmethodID _MID_getScummVMLogPath;
    static jmethodID _MID_setCurrentGame;
    static jmethodID _MID_getSysArchives;
    static jmethodID _MID_getAllStorageLocations;
    static jmethodID _MID_initSurface;
    static jmethodID _MID_deinitSurface;
    static jmethodID _MID_eglVersion;
    static jmethodID _MID_getNewSAFTree;
    static jmethodID _MID_getSAFTrees;
    static jmethodID _MID_findSAFTree;
    static jmethodID _MID_exportBackup;
    static jmethodID _MID_importBackup;

    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,
                        jboolean assets_updated_);
    static void destroy(JNIEnv *env, jobject self);

    static void setSurface(JNIEnv *env, jobject self, jint width, jint height, jint bpp);
    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, int arg6);
    static void updateTouch(JNIEnv *env, jobject self, int action, int ptr, int x, int y);
    static void setupTouchMode(JNIEnv *env, jobject self, jint oldValue, jint newValue);
    static void syncVirtkeyboardState(JNIEnv *env, jobject self, jboolean newState);
    static void setPause(JNIEnv *env, jobject self, jboolean value);

    static void systemInsetsUpdated(JNIEnv *env, jobject self, jintArray gestureInsets, jintArray systemInsets, jintArray cutoutInsets);

    static jstring getNativeVersionInfo(JNIEnv *env, jobject self);
    static jstring convertToJString(JNIEnv *env, const Common::U32String &str);
    static Common::U32String convertFromJString(JNIEnv *env, const jstring &jstr);

    static JNIEnv *fetchEnv();
    static int fetchEGLVersion();
};

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