content: package org.libsdl.app;
  
  import javax.microedition.khronos.egl.EGL10;
  import javax.microedition.khronos.egl.EGLConfig;
  import javax.microedition.khronos.egl.EGLContext;
  import javax.microedition.khronos.opengles.GL10;
  import javax.microedition.khronos.egl.*;
  
  import android.app.*;
  import android.content.*;
  import android.view.*;
  import android.os.*;
  import android.util.Log;
  import android.graphics.*;
  import android.text.method.*;
  import android.text.*;
  import android.media.*;
  import android.hardware.*;
  import android.content.*;
  
  import java.lang.*;
  
  
  /**
      SDL Activity
  */
  public class SDLActivity extends Activity {
  
      // Main components
      private static SDLActivity mSingleton;
      private static SDLSurface mSurface;
  
      // This is what SDL runs in. It invokes SDL_main(), eventually
      private static Thread mSDLThread;
  
      // Audio
      private static Thread mAudioThread;
      private static AudioTrack mAudioTrack;
  
      // EGL private objects
      private static EGLContext  mEGLContext;
      private static EGLSurface  mEGLSurface;
      private static EGLDisplay  mEGLDisplay;
      private static EGLConfig   mEGLConfig;
      private static int mGLMajor, mGLMinor;
  
      // Load the .so
      static {
          System.loadLibrary("SDL");
          //System.loadLibrary("SDL_image");
          //System.loadLibrary("SDL_mixer");
          //System.loadLibrary("SDL_ttf");
          System.loadLibrary("main");
      }
  
      // Setup
      protected void onCreate(Bundle savedInstanceState) {
          //Log.v("SDL", "onCreate()");
          super.onCreate(savedInstanceState);
          
          // So we can call stuff from static callbacks
          mSingleton = this;
  
          // Set up the surface
          mSurface = new SDLSurface(getApplication());
          setContentView(mSurface);
          SurfaceHolder holder = mSurface.getHolder();
      }
  
      // Events
      protected void onPause() {
          Log.v("SDL", "onPause()");
          super.onPause();
          SDLActivity.nativePause();
      }
  
      protected void onResume() {
          Log.v("SDL", "onResume()");
          super.onResume();
          SDLActivity.nativeResume();
      }
  
      protected void onDestroy() {
          super.onDestroy();
          Log.v("SDL", "onDestroy()");
          // Send a quit message to the application
          SDLActivity.nativeQuit();
  
          // Now wait for the SDL thread to quit
          if (mSDLThread != null) {
              try {
                  mSDLThread.join();
              } catch(Exception e) {
                  Log.v("SDL", "Problem stopping thread: " + e);
              }
              mSDLThread = null;
  
              //Log.v("SDL", "Finished waiting for SDL thread");
          }
      }
  
      // Messages from the SDLMain thread
      static int COMMAND_CHANGE_TITLE = 1;
  
      // Handler for the messages
      Handler commandHandler = new Handler() {
          public void handleMessage(Message msg) {
              if (msg.arg1 == COMMAND_CHANGE_TITLE) {
                  setTitle((String)msg.obj);
              }
          }
      };
  
      // Send a message from the SDLMain thread
      void sendCommand(int command, Object data) {
          Message msg = commandHandler.obtainMessage();
          msg.arg1 = command;
          msg.obj = data;
          commandHandler.sendMessage(msg);
      }
  
      // C functions we call
      public static native void nativeInit();
      public static native void nativeQuit();
      public static native void nativePause();
      public static native void nativeResume();
      public static native void onNativeResize(int x, int y, int format);
      public static native void onNativeKeyDown(int keycode);
      public static native void onNativeKeyUp(int keycode);
      public static native void onNativeTouch(int touchDevId, int pointerFingerId,
                                              int action, float x, 
                                              float y, float p);
      public static native void onNativeAccel(float x, float y, float z);
      public static native void nativeRunAudioThread();
  
  
      // Java functions called from C
  
      public static boolean createGLContext(int majorVersion, int minorVersion) {
          return initEGL(majorVersion, minorVersion);
      }
  
      public static void flipBuffers() {
          flipEGL();
      }
  
      public static void setActivityTitle(String title) {
          // Called from SDLMain() thread and can't directly affect the view
          mSingleton.sendCommand(COMMAND_CHANGE_TITLE, title);
      }
  
      public static Context getContext() {
          return mSingleton;
      }
  
      public static void startApp() {
          // Start up the C app thread
          if (mSDLThread == null) {
              mSDLThread = new Thread(new SDLMain(), "SDLThread");
              mSDLThread.start();
          }
          else {
              SDLActivity.nativeResume();
          }
      }
  
      // EGL functions
      public static boolean initEGL(int majorVersion, int minorVersion) {
          if (SDLActivity.mEGLDisplay == null) {
              //Log.v("SDL", "Starting up OpenGL ES " + majorVersion + "." + minorVersion);
  
              try {
                  EGL10 egl = (EGL10)EGLContext.getEGL();
  
                  EGLDisplay dpy = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
  
                  int[] version = new int[2];
                  egl.eglInitialize(dpy, version);
  
                  int EGL_OPENGL_ES_BIT = 1;
                  int EGL_OPENGL_ES2_BIT = 4;
                  int renderableType = 0;
                  if (majorVersion == 2) {
                      renderableType = EGL_OPENGL_ES2_BIT;
                  } else if (majorVersion == 1) {
                      renderableType = EGL_OPENGL_ES_BIT;
                  }
                  int[] configSpec = {
                      //EGL10.EGL_DEPTH_SIZE,   16,
                      EGL10.EGL_RENDERABLE_TYPE, renderableType,
                      EGL10.EGL_NONE
                  };
                  EGLConfig[] configs = new EGLConfig[1];
                  int[] num_config = new int[1];
                  if (!egl.eglChooseConfig(dpy, configSpec, configs, 1, num_config) || num_config[0] == 0) {
                      Log.e("SDL", "No EGL config available");
                      return false;
                  }
                  EGLConfig config = configs[0];
  
                  /*int EGL_CONTEXT_CLIENT_VERSION=0x3098;
                  int contextAttrs[] = new int[] { EGL_CONTEXT_CLIENT_VERSION, majorVersion, EGL10.EGL_NONE };
                  EGLContext ctx = egl.eglCreateContext(dpy, config, EGL10.EGL_NO_CONTEXT, contextAttrs);
  
                  if (ctx == EGL10.EGL_NO_CONTEXT) {
                      Log.e("SDL", "Couldn't create context");
                      return false;
                  }
                  SDLActivity.mEGLContext = ctx;*/
                  SDLActivity.mEGLDisplay = dpy;
                  SDLActivity.mEGLConfig = config;
                  SDLActivity.mGLMajor = majorVersion;
                  SDLActivity.mGLMinor = minorVersion;
  
                  SDLActivity.createEGLSurface();
              } catch(Exception e) {
                  Log.v("SDL", e + "");
                  for (StackTraceElement s : e.getStackTrace()) {
                      Log.v("SDL", s.toString());
                  }
              }
          }
          else SDLActivity.createEGLSurface();
  
          return true;
      }
  
      public static boolean createEGLContext() {
          EGL10 egl = (EGL10)EGLContext.getEGL();
          int EGL_CONTEXT_CLIENT_VERSION=0x3098;
          int contextAttrs[] = new int[] { EGL_CONTEXT_CLIENT_VERSION, SDLActivity.mGLMajor, EGL10.EGL_NONE };
          SDLActivity.mEGLContext = egl.eglCreateContext(SDLActivity.mEGLDisplay, SDLActivity.mEGLConfig, EGL10.EGL_NO_CONTEXT, contextAttrs);
          if (SDLActivity.mEGLContext == EGL10.EGL_NO_CONTEXT) {
              Log.e("SDL", "Couldn't create context");
              return false;
          }
          return true;
      }
  
      public static boolean createEGLSurface() {
          if (SDLActivity.mEGLDisplay != null && SDLActivity.mEGLConfig != null) {
              EGL10 egl = (EGL10)EGLContext.getEGL();
              if (SDLActivity.mEGLContext == null) createEGLContext();
  
              Log.v("SDL", "Creating new EGL Surface");
              EGLSurface surface = egl.eglCreateWindowSurface(SDLActivity.mEGLDisplay, SDLActivity.mEGLConfig, SDLActivity.mSurface, null);
              if (surface == EGL10.EGL_NO_SURFACE) {
                  Log.e("SDL", "Couldn't create surface");
                  return false;
              }
  
              if (!egl.eglMakeCurrent(SDLActivity.mEGLDisplay, surface, surface, SDLActivity.mEGLContext)) {
                  Log.e("SDL", "Old EGL Context doesnt work, trying with a new one");
                  createEGLContext();
                  if (!egl.eglMakeCurrent(SDLActivity.mEGLDisplay, surface, surface, SDLActivity.mEGLContext)) {
                      Log.e("SDL", "Failed making EGL Context current");
                      return false;
                  }
              }
              SDLActivity.mEGLSurface = surface;
              return true;
          }
          return false;
      }
  
      // EGL buffer flip
      public static void flipEGL() {
          try {
              EGL10 egl = (EGL10)EGLContext.getEGL();
  
              egl.eglWaitNative(EGL10.EGL_CORE_NATIVE_ENGINE, null);
  
              // drawing here
  
              egl.eglWaitGL();
  
              egl.eglSwapBuffers(SDLActivity.mEGLDisplay, SDLActivity.mEGLSurface);
  
  
          } catch(Exception e) {
              Log.v("SDL", "flipEGL(): " + e);
              for (StackTraceElement s : e.getStackTrace()) {
                  Log.v("SDL", s.toString());
              }
          }
      }
  
      // Audio
      private static Object buf;
      
      public static Object audioInit(int sampleRate, boolean is16Bit, boolean isStereo, int desiredFrames) {
          int channelConfig = isStereo ? AudioFormat.CHANNEL_CONFIGURATION_STEREO : AudioFormat.CHANNEL_CONFIGURATION_MONO;
          int audioFormat = is16Bit ? AudioFormat.ENCODING_PCM_16BIT : AudioFormat.ENCODING_PCM_8BIT;
          int frameSize = (isStereo ? 2 : 1) * (is16Bit ? 2 : 1);
          
          Log.v("SDL", "SDL audio: wanted " + (isStereo ? "stereo" : "mono") + " " + (is16Bit ? "16-bit" : "8-bit") + " " + ((float)sampleRate / 1000f) + "kHz, " + desiredFrames + " frames buffer");
          
          // Let the user pick a larger buffer if they really want -- but ye
          // gods they probably shouldn't, the minimums are horrifyingly high
          // latency already
          desiredFrames = Math.max(desiredFrames, (AudioTrack.getMinBufferSize(sampleRate, channelConfig, audioFormat) + frameSize - 1) / frameSize);
          
          mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
                  channelConfig, audioFormat, desiredFrames * frameSize, AudioTrack.MODE_STREAM);
          
          audioStartThread();
          
          Log.v("SDL", "SDL audio: got " + ((mAudioTrack.getChannelCount() >= 2) ? "stereo" : "mono") + " " + ((mAudioTrack.getAudioFormat() == AudioFormat.ENCODING_PCM_16BIT) ? "16-bit" : "8-bit") + " " + ((float)mAudioTrack.getSampleRate() / 1000f) + "kHz, " + desiredFrames + " frames buffer");
          
          if (is16Bit) {
              buf = new short[desiredFrames * (isStereo ? 2 : 1)];
          } else {
              buf = new byte[desiredFrames * (isStereo ? 2 : 1)]; 
          }
          return buf;
      }
      
      public static void audioStartThread() {
          mAudioThread = new Thread(new Runnable() {
              public void run() {
                  mAudioTrack.play();
                  nativeRunAudioThread();
              }
          });
          
          // I'd take REALTIME if I could get it!
          mAudioThread.setPriority(Thread.MAX_PRIORITY);
          mAudioThread.start();
      }
      
      public static void audioWriteShortBuffer(short[] buffer) {
          for (int i = 0; i < buffer.length; ) {
              int result = mAudioTrack.write(buffer, i, buffer.length - i);
              if (result > 0) {
                  i += result;
              } else if (result == 0) {
                  try {
                      Thread.sleep(1);
                  } catch(InterruptedException e) {
                      // Nom nom
                  }
              } else {
                  Log.w("SDL", "SDL audio: error return from write(short)");
                  return;
              }
          }
      }
      
      public static void audioWriteByteBuffer(byte[] buffer) {
          for (int i = 0; i < buffer.length; ) {
              int result = mAudioTrack.write(buffer, i, buffer.length - i);
              if (result > 0) {
                  i += result;
              } else if (result == 0) {
                  try {
                      Thread.sleep(1);
                  } catch(InterruptedException e) {
                      // Nom nom
                  }
              } else {
                  Log.w("SDL", "SDL audio: error return from write(short)");
                  return;
              }
          }
      }
  
      public static void audioQuit() {
          if (mAudioThread != null) {
              try {
                  mAudioThread.join();
              } catch(Exception e) {
                  Log.v("SDL", "Problem stopping audio thread: " + e);
              }
              mAudioThread = null;
  
              //Log.v("SDL", "Finished waiting for audio thread");
          }
  
          if (mAudioTrack != null) {
              mAudioTrack.stop();
              mAudioTrack = null;
          }
      }
  }
  
  /**
      Simple nativeInit() runnable
  */
  class SDLMain implements Runnable {
      public void run() {
          // Runs SDL_main()
          SDLActivity.nativeInit();
  
          //Log.v("SDL", "SDL thread terminated");
      }
  }
  
  
  /**
      SDLSurface. This is what we draw on, so we need to know when it's created
      in order to do anything useful. 
  
      Because of this, that's where we set up the SDL thread
  */
  class SDLSurface extends SurfaceView implements SurfaceHolder.Callback, 
      View.OnKeyListener, View.OnTouchListener, SensorEventListener  {
  
      // Sensors
      private static SensorManager mSensorManager;
  
      // Startup    
      public SDLSurface(Context context) {
          super(context);
          getHolder().addCallback(this); 
      
          setFocusable(true);
          setFocusableInTouchMode(true);
          requestFocus();
          setOnKeyListener(this); 
          setOnTouchListener(this);   
  
          mSensorManager = (SensorManager)context.getSystemService("sensor");  
      }
  
      // Called when we have a valid drawing surface
      public void surfaceCreated(SurfaceHolder holder) {
          Log.v("SDL", "surfaceCreated()");
          holder.setType(SurfaceHolder.SURFACE_TYPE_GPU);
          SDLActivity.createEGLSurface();
          enableSensor(Sensor.TYPE_ACCELEROMETER, true);
      }
  
      // Called when we lose the surface
      public void surfaceDestroyed(SurfaceHolder holder) {
          Log.v("SDL", "surfaceDestroyed()");
          SDLActivity.nativePause();
          enableSensor(Sensor.TYPE_ACCELEROMETER, false);
      }
  
      // Called when the surface is resized
      public void surfaceChanged(SurfaceHolder holder,
                                 int format, int width, int height) {
          Log.v("SDL", "surfaceChanged()");
  
          int sdlFormat = 0x85151002; // SDL_PIXELFORMAT_RGB565 by default
          switch (format) {
          case PixelFormat.A_8:
              Log.v("SDL", "pixel format A_8");
              break;
          case PixelFormat.LA_88:
              Log.v("SDL", "pixel format LA_88");
              break;
          case PixelFormat.L_8:
              Log.v("SDL", "pixel format L_8");
              break;
          case PixelFormat.RGBA_4444:
              Log.v("SDL", "pixel format RGBA_4444");
              sdlFormat = 0x85421002; // SDL_PIXELFORMAT_RGBA4444
              break;
          case PixelFormat.RGBA_5551:
              Log.v("SDL", "pixel format RGBA_5551");
              sdlFormat = 0x85441002; // SDL_PIXELFORMAT_RGBA5551
              break;
          case PixelFormat.RGBA_8888:
              Log.v("SDL", "pixel format RGBA_8888");
              sdlFormat = 0x86462004; // SDL_PIXELFORMAT_RGBA8888
              break;
          case PixelFormat.RGBX_8888:
              Log.v("SDL", "pixel format RGBX_8888");
              sdlFormat = 0x86262004; // SDL_PIXELFORMAT_RGBX8888
              break;
          case PixelFormat.RGB_332:
              Log.v("SDL", "pixel format RGB_332");
              sdlFormat = 0x84110801; // SDL_PIXELFORMAT_RGB332
              break;
          case PixelFormat.RGB_565:
              Log.v("SDL", "pixel format RGB_565");
              sdlFormat = 0x85151002; // SDL_PIXELFORMAT_RGB565
              break;
          case PixelFormat.RGB_888:
              Log.v("SDL", "pixel format RGB_888");
              // Not sure this is right, maybe SDL_PIXELFORMAT_RGB24 instead?
              sdlFormat = 0x86161804; // SDL_PIXELFORMAT_RGB888
              break;
          default:
              Log.v("SDL", "pixel format unknown " + format);
              break;
          }
          SDLActivity.onNativeResize(width, height, sdlFormat);
          Log.v("SDL", "Window size:" + width + "x"+height);
  
          SDLActivity.startApp();
      }
  
      // unused
      public void onDraw(Canvas canvas) {}
  
  
  
  
      // Key events
      public boolean onKey(View  v, int keyCode, KeyEvent event) {
  
          if (event.getAction() == KeyEvent.ACTION_DOWN) {
              //Log.v("SDL", "key down: " + keyCode);
              SDLActivity.onNativeKeyDown(keyCode);
              return true;
          }
          else if (event.getAction() == KeyEvent.ACTION_UP) {
              //Log.v("SDL", "key up: " + keyCode);
              SDLActivity.onNativeKeyUp(keyCode);
              return true;
          }
          
          return false;
      }
  
      // Touch events
      public boolean onTouch(View v, MotionEvent event) {
          {
               final int touchDevId = event.getDeviceId();
               final int pointerCount = event.getPointerCount();
               // touchId, pointerId, action, x, y, pressure
               int actionPointerIndex = event.getActionIndex();
               int pointerFingerId = event.getPointerId(actionPointerIndex);
               int action = event.getActionMasked();
  
               float x = event.getX(actionPointerIndex);
               float y = event.getY(actionPointerIndex);
               float p = event.getPressure(actionPointerIndex);
  
               if (action == MotionEvent.ACTION_MOVE && pointerCount > 1) {
                  // TODO send motion to every pointer if its position has
                  // changed since prev event.
                  for (int i = 0; i < pointerCount; i++) {
                      pointerFingerId = event.getPointerId(i);
                      x = event.getX(i);
                      y = event.getY(i);
                      p = event.getPressure(i);
                      SDLActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);
                  }
               } else {
                  SDLActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);
               }
          }
        return true;
     } 
  
      // Sensor events
      public void enableSensor(int sensortype, boolean enabled) {
          // TODO: This uses getDefaultSensor - what if we have >1 accels?
          if (enabled) {
              mSensorManager.registerListener(this, 
                              mSensorManager.getDefaultSensor(sensortype), 
                              SensorManager.SENSOR_DELAY_GAME, null);
          } else {
              mSensorManager.unregisterListener(this, 
                              mSensorManager.getDefaultSensor(sensortype));
          }
      }
      
      public void onAccuracyChanged(Sensor sensor, int accuracy) {
          // TODO
      }
  
      public void onSensorChanged(SensorEvent event) {
          if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
              SDLActivity.onNativeAccel(event.values[0] / SensorManager.GRAVITY_EARTH,
                                        event.values[1] / SensorManager.GRAVITY_EARTH,
                                        event.values[2] / SensorManager.GRAVITY_EARTH);
          }
      }
  
  }
  
  