/* * Copyright (C) 2004 MobileBlogger Development Team */package net.sourceforge.mobileblogger;import java.io.IOException;import javax.microedition.lcdui.*;import javax.microedition.media.*;import javax.microedition.media.control.*;import javax.microedition.midlet.*;public class Camera extends Form implements CommandListener {  private MIDlet midlet;  private Display display;  private Command mExitCommand, mCameraCommand;  private Command mBackCommand, mCaptureCommand;  private Player mPlayer;  private VideoControl mVideoControl;  /*********************/  public Camera(MIDlet m, Display d) {	  super("Photo Blogging");	  midlet = m;	  display = d;      mExitCommand = new Command("Exit", Command.EXIT, 0);      mCameraCommand = new Command("Camera", Command.SCREEN, 0);      mBackCommand = new Command("Back", Command.BACK, 0);      mCaptureCommand = new Command("Capture", Command.SCREEN, 0);      addCommand(mBackCommand);    String supports = System.getProperty("video.snapshot.encodings");    if (supports != null && supports.length() > 0) {      append("Ready to take pictures.");      addCommand(mCameraCommand);    }    else      append("Mobile Blogger cannot use this " +          "device to take pictures.");    setCommandListener(this);  }  /*********************/  public void commandAction(Command c, Displayable s) {    if (c.getCommandType() == Command.EXIT) {      display.setCurrent( new Menu(midlet, display) );    }    else if (c == mCameraCommand)      showCamera();    else if (c == mBackCommand)      display.setCurrent( new Menu(midlet, display) );    else if (c == mCaptureCommand) {      capture();    }  }  /******************/  private void showCamera() {    try {      mPlayer = Manager.createPlayer("capture://video");      mPlayer.realize();      mVideoControl = (VideoControl)mPlayer.getControl("VideoControl");      Canvas canvas = new CameraCanvas(midlet, mVideoControl, this);      canvas.addCommand(mBackCommand);      canvas.addCommand(mCaptureCommand);      canvas.setCommandListener(this);      display.setCurrent(canvas);      mPlayer.start();    }    catch (IOException ioe) { handleException(ioe); }    catch (MediaException me) { handleException(me); }  } /*******************/  public void capture() {    try {      // Get the image.      byte[] raw = mVideoControl.getSnapshot(null);      Image image = Image.createImage(raw, 0, raw.length);      Image thumb = createThumbnail(image);      // Place it in the main form.      if (size() > 0 && get(0) instanceof StringItem)        delete(0);      append(thumb);      // Flip back to the main form.      display.setCurrent(this);      // Shut down the player.      mPlayer.close();      mPlayer = null;      mVideoControl = null;    }    catch (MediaException me) { handleException(me); }  }  private void handleException(Exception e) {    Alert a = new Alert("Exception", e.toString(), null, null);    a.setTimeout(50);    append("Mobile Blogger cannot use this " +          "device to take pictures. Press Back.");    //display.setCurrent( new Menu(midlet, display) );  }  /********************/  private Image createThumbnail(Image image) {    int sourceWidth = image.getWidth();    int sourceHeight = image.getHeight();    int thumbWidth = 64;    int thumbHeight = -1;    if (thumbHeight == -1)      thumbHeight = thumbWidth * sourceHeight / sourceWidth;    Image thumb = Image.createImage(thumbWidth, thumbHeight);    Graphics g = thumb.getGraphics();    for (int y = 0; y < thumbHeight; y++) {      for (int x = 0; x < thumbWidth; x++) {        g.setClip(x, y, 1, 1);        int dx = x * sourceWidth / thumbWidth;        int dy = y * sourceHeight / thumbHeight;        g.drawImage(image, x - dx, y - dy, Graphics.LEFT | Graphics.TOP);      }    }    Image immutableThumb = Image.createImage(thumb);    return immutableThumb;  }}