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• DLL Config in Mono

  - by nubela

  Hi, I'm trying to pick up Svn.NET (http://www.pumacode.org/projects/svndotnet/) library for use in my Mono project. I tried compiling its mockapp - svnmockapp project (http://www.pumacode.org/projects/svndotnet/browser/trunk/SvnMockApp) , I am able to get the references right and get it compiled right. I understand that it references 2 other modules libapr (libapr-1.so.0) and svn_client (libsvn_client-1.so.0) , by which I've created PumaCode.SvnDotNet.dll.config in /bin/Debug . That is all I've done to tried to try to get the mockapp at least outputting something to show that it is indeed interfacing SVN. Nevertheless, it is not working. Commands that are entered that doesn't interface SVN works fine: $ mono SvnTest.exe -usage Usage: SvnTest <subcommand> [options] Short Options: ~?.V Subcommands: add, checkout[co], status[st], update[up] For help on subcommands, use the -?/--help subcommand option. Commands that tries to access SVN throws an exception: $ mono SvnTest.exe st An exception was thrown by the type initializer for PumaCode.SvnDotNet.AprSharp.Apr Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object at PumaCode.SvnDotNet.SubversionSharp.SvnMockApp.CmdBase.Run (PumaCode.SvnDotNet.SubversionSharp.SvnMockApp.SubCommand sc, System.String[] args) [0x00000] at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception&) at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] --- End of inner exception stack trace --- at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] at PumaCode.SvnDotNet.SubversionSharp.SvnMockApp.Application.Run (System.String[] args) [0x00000] at PumaCode.SvnDotNet.SubversionSharp.SvnMockApp.Application.Main (System.String[] args) [0x00000] Using MONO_DEBUG_LEVEL="debug", we get the following log pasted here. At the tail end of the log, we see this: . . . Mono-INFO: DllImport attempting to load: 'libapr-1'. Mono-INFO: DllImport loading location: 'libapr-1.so'. Mono-INFO: DllImport error loading library: 'libapr-1.so: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport loading library: './libapr-1.so'. Mono-INFO: DllImport error loading library './libapr-1.so: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport loading: 'libapr-1'. Mono-INFO: DllImport error loading library 'libapr-1: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport attempting to load: 'libapr-1'. Mono-INFO: DllImport loading location: 'libapr-1.so'. Mono-INFO: DllImport error loading library: 'libapr-1.so: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport loading library: './libapr-1.so'. Mono-INFO: DllImport error loading library './libapr-1.so: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport loading: 'libapr-1'. Mono-INFO: DllImport error loading library 'libapr-1: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport attempting to load: 'libapr-1'. Mono-INFO: DllImport loading location: 'libapr-1.so'. Mono-INFO: DllImport error loading library: 'libapr-1.so: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport loading library: './libapr-1.so'. Mono-INFO: DllImport error loading library './libapr-1.so: cannot open shared object file: No such file or directory'. Mono-INFO: DllImport loading: 'libapr-1'. Mono-INFO: DllImport error loading library 'libapr-1: cannot open shared object file: No such file or directory'. An exception was thrown by the type initializer for PumaCode.SvnDotNet.AprSharp.Apr I've tried to symlink the appropriate modules in the directory where SvnTest.exe exists, but this still persist. How can I fix this? Did I place the PumaCode.SvnDotNet.dll.config in the wrong folder? (I placed it at /bin/Debug and also tried /bin) What can I do to remedy this? Thank you for your kind help! Much appreciated! Heres the config file: (PumaCode.SvnDotNet.dll.config) <configuration> <dllmap dll="libapr" target="/usr/lib/libapr-1.so.0"/> <dllmap dll="svn_client-1" target="/usr/lib/libsvn_client-1.so.0"/> </configuration>

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• Hello World Pagelet

  - by astemkov

  Introduction The goal of this exercise is to give you a basic feel of how you can use Pagelet Producer to proxy a web page We will proxy a simple static Hello World web page, cut one section out of that page and present it as a pagelet that you can later insert on your own application page or to your portal page such as WebCenter Portal space or WebCenter Interaction community page. Hello World sample app This is the static web page we will work with: Let's assume the following: The Hello World web page is running on server http://appserver.company.com:1234/ The Hello World web page path is: http://appserver.company.com:1234/helloworld/ Initial Pagelet Producer setup Let's assume that the Pagelet Producer server is running on http://pageletserver.company.com:8889/pagelets/ First let's check that Pagelet Producer is up and running. In order to do that we just need to access the following URL: http://pageletserver.company.com:8889/pagelets/ And this is what should be returned: Now you can access Pagelet Producer administration screens using this URL: http://pageletserver.company.com:8889/pagelets/admin This is how the UI looks: Now if you connect to the internet via proxy server, you need to configure proxy in Pagelet Producer settings. In the Navigator pane: Jump To - Settings Click on "Proxy" Enter your proxy server configuration: Creating a resource First thing that you need to do is to create a resource for your web page. This will tell Pagelet Producer that all sub-paths of the web page should be proxied. It also will allow you to setup common rules of how your web page should be proxied and will serve as a container for your pagelets. In the Navigator pane: Jump To - Resources Click on any existing resource (ex. welcome_resource) Click on "Create selected type" toolbar button at the top of the Navigator pane Select "Web" in the "Select Producer Type" dialog box and click "OK" Now after the resource is created let's click on "General" sub-item a specify the following values Name = AppServer Source URL = http://appserver.company.com:1234/ Destination URL = /appserver/ Click on "Save" toolbar button at the top of the Navigator pane After the resource is created our web page becomes accessible by the URL: http://pageletserver.company.com:8889/pagelets/appserver/helloworld/ So in original web page address Source URL is replaced with Pagelet Producer URL (http://pageletserver.company.com:8889/pagelets) + Destination URL Creating a pagelet Now let's create "Hello World" pagelet. Under the resource node activate Pagelets subnode Click on "Create selected type" toolbar button at the top of the Navigator pane Click on "General" sub-node of newly created pagelet and specify the following values Name = Hello_World Library = MyLib Library is used for logical grouping. The portals use the "Library" value to group pagelets in their respective UI's. For example, when adding pagelets to a WebCenter Portal space you would see the individual pagelets listed under the "Library" name. URL Suffix = helloworld/index.html this is where the Hello World page html is served from Click on "Save" toolbar button at the top of the Navigator pane The Library name can be anything you want, it doesn't have to match the resource name at all. It is used as a logical grouping of pagelets, and you can include pagelets from multiple resources into the same library or create a new library for each pagelet. After you save the pagelet you can access it here: http://pageletserver.company.com:8889/pagelets/inject/v2/pagelet/MyLib/Hello_World which is : http://pageletserver.company.com:8889/pagelets/inject/v2/pagelet/ + [Library] + [Name] Or to test the injection of a pagelet into iframe you can click on the pagelets "Documentation" sub-node and use "Access Pagelet using REST" URL: This is what we will see: Clipping The pagelet that we just created covers the whole web page, but we want just the "Hello World" segment of it. So let's clip it. Under the Hello_World pagelet node activate Clipper sub-node Click on "Create selected type" toolbar button at the top of the Navigator pane Specify a Name for newly created clipper. For example: "c1" Click on "Content" sub-node of the clipper Click on "Launch Clipper" button New browser window will open By moving a mouse pointer over the web page select the area you want to clip: Click left mouse button - the browser window will disappear and you will see that Clipping Path was automatically generated Now let's save and access the link from the "Documentation" page again Here's our pagelet nicely clipped and ready for being used on your Web Center Space

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• Thread safe double buffering

  - by kdavis8

  I am trying to implement a draw map method that will draw the tiled image across the surface of the component. I'm having issue with this code. The double buffering does not seem to be working, because the sprite flickers like crazy; my source code: package myPackage; import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Toolkit; import java.awt.image.BufferStrategy; import java.awt.image.BufferedImage; import javax.swing.JFrame; public class GameView extends JFrame implements Runnable { public BufferedImage backbuffer; public Graphics2D g2d; public Image img; Thread gameloop; Scene scene; public GameView() { super("Game View"); setSize(600, 600); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); backbuffer = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB); g2d = backbuffer.createGraphics(); Toolkit tk = Toolkit.getDefaultToolkit(); img = tk.getImage(this.getClass().getResource("cage.png")); scene = new Scene(g2d, this); gameloop = new Thread(this); gameloop.start(); } public static void main(String args[]) { new GameView(); } public void paint(Graphics g) { g.drawImage(backbuffer, 0, 0, this); repaint(); } @Override public void run() { // TODO Auto-generated method stub Thread t = Thread.currentThread(); while (t == gameloop) { scene.getScene("dirtmap"); g2d.drawImage(img, 80, 80,this![enter image description here][1]); } } private void drawScene(String string) { // TODO Auto-generated method stub // g2d.setColor(Color.white); // g2d.fillRect(0, 0, getWidth(), getHeight()); scene.getScene(string); } } package myPackage; import java.awt.Color; import java.awt.Component; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Toolkit; public class Scene { Graphics g2d; Component c; boolean loaded = false; public Scene(Graphics2D gr, Component co) { g2d = gr; c = co; } public void getScene(String mapName) { Toolkit tk = Toolkit.getDefaultToolkit(); Image tile = tk.getImage(this.getClass().getResource("dirt.png")); // g2d.setColor(Color.red); for (int y = 0; y <= 18; y++) { for (int x = 0; x <= 18; x += 1) { g2d.drawImage(tile, x * 32, y * 32, c); } } loaded = true; } }

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• capturing video from ip camera

  - by Ruby

  I am trying to capture video from ip camera into my application , its giving exception com.sun.image.codec.jpeg.ImageFormatException: Not a JPEG file: starts with 0x0d 0x0a at sun.awt.image.codec.JPEGImageDecoderImpl.readJPEGStream(Native Method) at sun.awt.image.codec.JPEGImageDecoderImpl.decodeAsBufferedImage(Unknown Source) at test.AxisCamera1.readJPG(AxisCamera1.java:130) at test.AxisCamera1.readMJPGStream(AxisCamera1.java:121) at test.AxisCamera1.readStream(AxisCamera1.java:100) at test.AxisCamera1.run(AxisCamera1.java:171) at java.lang.Thread.run(Unknown Source) its giving exception at image = decoder.decodeAsBufferedImage(); Here is the code i am trying private static final long serialVersionUID = 1L; public boolean useMJPGStream = true; public String jpgURL = "http://ip here/video.cgi/jpg/image.cgi?resolution=640×480"; public String mjpgURL = "http://ip here /video.cgi/mjpg/video.cgi?resolution=640×480"; DataInputStream dis; private BufferedImage image = null; public Dimension imageSize = null; public boolean connected = false; private boolean initCompleted = false; HttpURLConnection huc = null; Component parent; /** Creates a new instance of AxisCamera */ public AxisCamera1(Component parent_) { parent = parent_; } public void connect() { try { URL u = new URL(useMJPGStream ? mjpgURL : jpgURL); huc = (HttpURLConnection) u.openConnection(); // System.out.println(huc.getContentType()); InputStream is = huc.getInputStream(); connected = true; BufferedInputStream bis = new BufferedInputStream(is); dis = new DataInputStream(bis); if (!initCompleted) initDisplay(); } catch (IOException e) { // incase no connection exists wait and try // again, instead of printing the error try { huc.disconnect(); Thread.sleep(60); } catch (InterruptedException ie) { huc.disconnect(); connect(); } connect(); } catch (Exception e) { ; } } public void initDisplay() { // setup the display if (useMJPGStream) readMJPGStream(); else { readJPG(); disconnect(); } imageSize = new Dimension(image.getWidth(this), image.getHeight(this)); setPreferredSize(imageSize); parent.setSize(imageSize); parent.validate(); initCompleted = true; } public void disconnect() { try { if (connected) { dis.close(); connected = false; } } catch (Exception e) { ; } } public void paint(Graphics g) { // used to set the image on the panel if (image != null) g.drawImage(image, 0, 0, this); } public void readStream() { // the basic method to continuously read the // stream try { if (useMJPGStream) { while (true) { readMJPGStream(); parent.repaint(); } } else { while (true) { connect(); readJPG(); parent.repaint(); disconnect(); } } } catch (Exception e) { ; } } public void readMJPGStream() { // preprocess the mjpg stream to remove the // mjpg encapsulation readLine(3, dis); // discard the first 3 lines readJPG(); readLine(2, dis); // discard the last two lines } public void readJPG() { // read the embedded jpeg image try { JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(dis); image = decoder.decodeAsBufferedImage(); } catch (Exception e) { e.printStackTrace(); disconnect(); } } public void readLine(int n, DataInputStream dis) { // used to strip out the // header lines for (int i = 0; i < n; i++) { readLine(dis); } } public void readLine(DataInputStream dis) { try { boolean end = false; String lineEnd = "\n"; // assumes that the end of the line is marked // with this byte[] lineEndBytes = lineEnd.getBytes(); byte[] byteBuf = new byte[lineEndBytes.length]; while (!end) { dis.read(byteBuf, 0, lineEndBytes.length); String t = new String(byteBuf); System.out.print(t); // uncomment if you want to see what the // lines actually look like if (t.equals(lineEnd)) end = true; } } catch (Exception e) { e.printStackTrace(); } } public void run() { System.out.println("in Run..................."); connect(); readStream(); } @SuppressWarnings("deprecation") public static void main(String[] args) { JFrame jframe = new JFrame(); jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); AxisCamera1 axPanel = new AxisCamera1(jframe); new Thread(axPanel).start(); jframe.getContentPane().add(axPanel); jframe.pack(); jframe.show(); } } Any suggestions what I am doing wrong here??

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• HTML, CSS: how can I merge these divs in order to use float:left property on their children ?

  - by Patrick

  hi, I've 2 sets of thumbnails and in each set I'm displaying them one nearby each other in 4 columns using float:left. I would like to "merge" the 2 sets (but I cannot change the html code) because I want the thumbnails of the second set floating right after the last thumbnail of the first set. In other terms, if in the last row there are only 2 thumbnails and the last 2 columns are empty, the thumbnails of the second set should fill the empty columns of the last row of the first set. This is the code... <div class="field field-type-filefield field-field-image"> <div class="field-items"> <div class="field-item odd"> <a rel="lightbox[field_image][First image&lt;br /&gt;&lt;br /&gt;&lt;a href=&quot;/lancelmaat/content/stalkshow&quot; id=&quot;node_link_text&quot; class=&quot;active&quot;&gt;View Image Details&lt;/a&gt;]" href="http://localhost/lancelmaat/sites/default/files/files/projects/Stalkshow/images/LPrisPetjong.jpeg" class="lightbox-processed"><img width="89" height="89" title="" alt="First image" src="http://localhost/lancelmaat/sites/default/files/imagecache/galleryImage/files/projects/Stalkshow/images/LPrisPetjong.jpeg"></a> </div> <div class="field-item even"> <a rel="lightbox[field_image][Second image&lt;br /&gt;&lt;br /&gt;&lt;a href=&quot;/lancelmaat/content/stalkshow&quot; id=&quot;node_link_text&quot; class=&quot;active&quot;&gt;View Image Details&lt;/a&gt;]" href="http://localhost/lancelmaat/sites/default/files/files/projects/Stalkshow/images/SeoulLEDScreen2a.jpeg" class="lightbox-processed"><img width="89" height="89" title="" alt="Second image" src="http://localhost/lancelmaat/sites/default/files/imagecache/galleryImage/files/projects/Stalkshow/images/SeoulLEDScreen2a.jpeg"></a> </div> <div class="field-item odd"> <a rel="lightbox[field_image][Third image&lt;br /&gt;&lt;br /&gt;&lt;a href=&quot;/lancelmaat/content/stalkshow&quot; id=&quot;node_link_text&quot; class=&quot;active&quot;&gt;View Image Details&lt;/a&gt;]" href="http://localhost/lancelmaat/sites/default/files/files/projects/Stalkshow/images/SeoulSKT6.jpeg" class="lightbox-processed"><img width="89" height="89" title="" alt="Third image" src="http://localhost/lancelmaat/sites/default/files/imagecache/galleryImage/files/projects/Stalkshow/images/SeoulSKT6.jpeg"></a> </div> </div> <!-- second set --> <div class="field field-type-filefield field-field-video"> <div class="field-items"> <div class="field-item odd"> <a rel="lightbox[field_video][Video Number 1&lt;br /&gt;&lt;br /&gt;&lt;a href=&quot;/lancelmaat/content/stalkshow&quot; id=&quot;node_link_text&quot; class=&quot;active&quot;&gt;View Image Details&lt;/a&gt;]" href="http://localhost/lancelmaat/sites/default/files/files/projects/Stalkshow/videos/StalkSeoul8d1Mbps.flv" class="lightbox-processed"><img title="" alt="Video Number 1" src="http://localhost/lancelmaat/sites/default/files/imagecache/galleryVideo/files/projects/Stalkshow/videos/StalkSeoul8d1Mbps.flv"></a> </div> <div class="field-item even"> <a rel="lightbox[field_video][Video Number 2&lt;br /&gt;&lt;br /&gt;&lt;a href=&quot;/lancelmaat/content/stalkshow&quot; id=&quot;node_link_text&quot; class=&quot;active&quot;&gt;View Image Details&lt;/a&gt;]" href="http://localhost/lancelmaat/sites/default/files/files/projects/Stalkshow/videos/stalkshowdvd21Mbps.flv" class="lightbox-processed"><img title="" alt="Video Number 2" src="http://localhost/lancelmaat/sites/default/files/imagecache/galleryVideo/files/projects/Stalkshow/videos/stalkshowdvd21Mbps.flv"></a> </div> <div class="field-item odd"> <a rel="lightbox[field_video][Video Number 3&lt;br /&gt;&lt;br /&gt;&lt;a href=&quot;/lancelmaat/content/stalkshow&quot; id=&quot;node_link_text&quot; class=&quot;active&quot;&gt;View Image Details&lt;/a&gt;]" href="http://localhost/lancelmaat/sites/default/files/files/projects/Stalkshow/videos/StalkShowMoscow1Mbps.flv" class="lightbox-processed"><img title="" alt="Video Number 3" src="http://localhost/lancelmaat/sites/default/files/imagecache/galleryVideo/files/projects/Stalkshow/videos/StalkShowMoscow1Mbps.flv"></a> </div> </div> </div> How can I merge these divs in order to use float:left property on their children ? thanks

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• JPA - insert and retrieve clob and blob types

  - by pachunoori.vinay.kumar(at)oracle.com

  This article describes about the JPA feature for handling clob and blob data types.You will learn the following in this article. @Lob annotation Client code to insert and retrieve the clob/blob types End to End ADFaces application to retrieve the image from database table and display it in web page. Use Case Description Persisting and reading the image from database using JPA clob/blob type. @Lob annotation By default, TopLink JPA assumes that all persistent data can be represented as typical database data types. Use the @Lob annotation with a basic mapping to specify that a persistent property or field should be persisted as a large object to a database-supported large object type. A Lob may be either a binary or character type. TopLink JPA infers the Lob type from the type of the persistent field or property. For string and character-based types, the default is Clob. In all other cases, the default is Blob. Example Below code shows how to use this annotation to specify that persistent field picture should be persisted as a Blob. public class Person implements Serializable {    @Id    @Column(nullable = false, length = 20)    private String name;    @Column(nullable = false)    @Lob    private byte[] picture;    @Column(nullable = false, length = 20) } Client code to insert and retrieve the clob/blob types Reading a image file and inserting to Database table Below client code will read the image from a file and persist to Person table in database.                       Person p=new Person();                      p.setName("Tom");                      p.setSex("male");                      p.setPicture(writtingImage("Image location"));// - c:\images\test.jpg                       sessionEJB.persistPerson(p); //Retrieving the image from Database table and writing to a file                       List<Person> plist=sessionEJB.getPersonFindAll();//                      Person person=(Person)plist.get(0);//get a person object                      retrieveImage(person.getPicture());   //get picture retrieved from Table //Private method to create byte[] from image file  private static byte[] writtingImage(String fileLocation) {      System.out.println("file lication is"+fileLocation);     IOManager manager=new IOManager();        try {           return manager.getBytesFromFile(fileLocation);                    } catch (IOException e) {        }        return null;    } //Private method to read byte[] from database and write to a image file    private static void retrieveImage(byte[] b) {    IOManager manager=new IOManager();        try {            manager.putBytesInFile("c:\\webtest.jpg",b);        } catch (IOException e) {        }    } End to End ADFaces application to retrieve the image from database table and display it in web page. Please find the application in this link. Following are the j2ee components used in the sample application. ADFFaces(jspx page) HttpServlet Class - Will make a call to EJB and retrieve the person object from person table.Read the byte[] and write to response using Outputstream. SessionEJBBean - This is a session facade to make a local call to JPA entities JPA Entity(Person.java) - Person java class with setter and getter method annotated with @Lob representing the clob/blob types for picture field.

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• using isight camera in macbookpro(8,2) on ubuntu 12.04 virtualbox VM

  - by Kurt Spindler

  I'm having a lot of trouble using the built-in isight camera on my macbookpro8,2 (early 2011) from an ubuntu 12.04 virtual machine, run inside VirtualBox. The following is the log I get when I try to run guvcview ubuntu@ubuntu:~$ guvcview guvcview 1.5.3 ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround71 ALSA lib setup.c:565:(add_elem) Cannot obtain info for CTL elem (MIXER,'IEC958 Playback Default',0,0,0): No such file or directory ALSA lib setup.c:565:(add_elem) Cannot obtain info for CTL elem (MIXER,'IEC958 Playback Default',0,0,0): No such file or directory ALSA lib setup.c:565:(add_elem) Cannot obtain info for CTL elem (MIXER,'IEC958 Playback Default',0,0,0): No such file or directory ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib pcm_dmix.c:957:(snd_pcm_dmix_open) The dmix plugin supports only playback stream Cannot connect to server socket err = No such file or directory Cannot connect to server socket jack server is not running or cannot be started video device: /dev/video0 Init. FaceTime HD Camera (Built-in) (location: usb-0000:00:0b.0-1) { pixelformat = 'YUYV', description = 'YUV 4:2:2 (YUYV)' } { discrete: width = 160, height = 120 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 176, height = 144 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 320, height = 240 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 352, height = 288 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 640, height = 480 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1280, height = 720 } Time interval between frame: 1/10, { pixelformat = 'MJPG', description = 'MJPEG' } { discrete: width = 960, height = 540 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1024, height = 576 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1280, height = 720 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { pixelformat = 'RGB3', description = 'RGB3' } { discrete: width = 160, height = 120 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 176, height = 144 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 320, height = 240 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 352, height = 288 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 640, height = 480 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1280, height = 720 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 960, height = 540 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1024, height = 576 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { pixelformat = 'BGR3', description = 'BGR3' } { discrete: width = 160, height = 120 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 176, height = 144 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 320, height = 240 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 352, height = 288 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 640, height = 480 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1280, height = 720 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 960, height = 540 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1024, height = 576 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { pixelformat = 'YU12', description = 'YU12' } { discrete: width = 160, height = 120 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 176, height = 144 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 320, height = 240 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 352, height = 288 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 640, height = 480 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1280, height = 720 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 960, height = 540 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1024, height = 576 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { pixelformat = 'YV12', description = 'YV12' } { discrete: width = 160, height = 120 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 176, height = 144 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 320, height = 240 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 352, height = 288 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 640, height = 480 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1280, height = 720 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 960, height = 540 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, { discrete: width = 1024, height = 576 } Time interval between frame: 100/2997, 1/25, 1/24, 1/15, vid:05ac pid:8509 driver:uvcvideo checking format: 1196444237 VIDIOC_G_COMP:: Invalid argument compression control not supported fps is set to 1/25 drawing controls no codec detected for H264 no codec detected for MP3 - (lavc) Checking video mode 960x540@32bpp : OK Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable Could not grab image (select timeout): Resource temporarily unavailable write /home/ubuntu/.guvcviewrc OK free controls cleaned allocations - 100% Closing portaudio ...OK Closing GTK... OK ubuntu@ubuntu:~$ Any help would be greatly appreciated. Only clue I have is that I initially was having problems, tried using the old method of fixing isights (involving installing isight-firmware-tools) before realizing that I just hadn't turned on the VM setting to allow the VM to access the webcam. :) Anyway, I wonder if installing that messed something up. However, I think this is a red herring because I've: shut down and turned back on the Mac, restarted the VM, tried a different VM (for which I never installed isight-firmware-tools, and created an entirely new ubuntu vm. All instances have had this problem. Similarly, other viewers, such as cheese, avplay, avconv have had all various kinds of errors.

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• Why are only some of my objects being rendered?

  - by BleedObsidian

  Every time I create a new asteroid the previous one is no longer rendered? I did some debugging and printed out the size of Array-List 'Small' and when a new asteroid is created it doesn't go down, so the thread is still there it's just not being rendered, Why? StatePlay: package me.bleedobsidian.astroidjump; import org.newdawn.slick.GameContainer; import org.newdawn.slick.Graphics; import org.newdawn.slick.SlickException; import org.newdawn.slick.state.BasicGameState; import org.newdawn.slick.state.StateBasedGame; public class StatePlay extends BasicGameState { int stateID = 10; Player player; Asteroids asteroids; StatePlay(int stateID) { this.stateID = stateID; } @Override public int getID() { return stateID; } @Override public void init(GameContainer gc, StateBasedGame sbg) throws SlickException { ResManager.loadImages(); player = new Player(); asteroids = new Asteroids(); } @Override public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException { g.setAntiAlias(true); player.render(g); asteroids.render(g); g.drawString("Asteroids: " + Asteroids.small.size(), 10, 25); } @Override public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException { player.update(gc, delta); asteroids.update(delta); } } Asteroids: package me.bleedobsidian.astroidjump; import java.util.ArrayList; import java.util.Timer; import org.newdawn.slick.Graphics; import org.newdawn.slick.Image; import org.newdawn.slick.SpriteSheet; public class Asteroids { public static ArrayList<Asteroid_Small> small = new ArrayList<Asteroid_Small>(); static SpriteSheet small_sprites = new SpriteSheet(ResManager.asteroids_small_ss, 32, 32); static Image small_1 = small_sprites.getSubImage(0, 0); static Image small_2 = small_sprites.getSubImage(1, 0); static Image small_3 = small_sprites.getSubImage(2, 0); static Image small_4 = small_sprites.getSubImage(3, 0); static boolean asteroids = true; static int diff = 0; Asteroids() { Task_Asteroids TaskA = new Task_Asteroids(); Timer timer = new Timer("Asteroids"); if(diff == 0) { timer.schedule(TaskA, 0, 4000); } else if(diff == 1) { timer.schedule(TaskA, 0, 3000); } } public static Image chooseSmallImage(int i) { if(i == 0) { return small_1; } else if(i == 1) { return small_2; } else if(i == 2) { return small_3; } else if(i == 3) { return small_4; } else { return small_1; } } public static void level_manager(float x) { if(x < 1000) { diff = 0; } else if(x < 2000) { diff = 1; } else if(x < 3000) { diff = 2; } else if(x < 5000) { diff = 3; } else if(x < 10000) { diff = 4; } else { diff = 5; } } public void update(int delta) { for(int s = 0; s < small.size(); s++) { Asteroid_Small as = small.get(s); as.update(delta); } } public void render(Graphics g) { for(int s = 0; s < small.size(); s++) { Asteroid_Small as = small.get(s); as.render(g); } } public static void setAsteroids(boolean tf) { asteroids = tf; } } Asteroid_Small: package me.bleedobsidian.astroidjump; import org.newdawn.slick.Graphics; import org.newdawn.slick.Image; public class Asteroid_Small { private static Image me; private static float x = 0; private static float y = 0; private static float speed = 0; private static float rotation = 0; private static float rotation_speed = 0; Asteroid_Small(Image i, float x, float y, float rs, float sp) { me = i; Asteroid_Small.x = x; Asteroid_Small.y = y; Asteroid_Small.rotation_speed = rs; Asteroid_Small.speed = sp; } public void update(int delta) { x -= speed * delta; rotation += rotation_speed * delta; me.setRotation(rotation); } public void render(Graphics g) { g.drawImage(me, x, y); } } Task_Asteroid: package me.bleedobsidian.astroidjump; import java.util.TimerTask; public class Task_Asteroids extends TimerTask { public void run() { if(Asteroids.diff == 0) { int randImage = (int) (Math.random() * 4); int randHeight = (int) (Math.random() * 480); Asteroids.small.add(new Asteroid_Small(Asteroids.chooseSmallImage(randImage), Player.x + 960, randHeight, 0.05f, 0.04f)); } } }

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• SignalR Server Error "The ConnectionId is in the incorrect format." with SignalR-ObjC Library

  - by ozzotto

  Before asking a separate question I've done lots of googling about it and added a comment in the already existing stackoverflow question. I have a SignalR Hub (tried both v. 1.1.3 and 2.0.0-rc) in my server with the below code: [HubName("TestHub")] public class TestHub : Hub { [Authorize] public void TestMethod(string test) { //some stuff here Clients.Caller.NotifyOnTestCompleted(); } } The problem persists if I remove the Authorize attribute. And in my iOS client I try to call it with the below code: SRHubConnection *hubConnection = [SRHubConnection connectionWithURL:_baseURL]; SRHubProxy *hubProxy = [hubConnection createHubProxy:@"TestHub"]; [hubProxy on:@"NotifyOnTestCompleted" perform:self selector:@selector(stopConnection)]; hubConnection.started = ^{ [hubProxy invoke:@"TestMethod" withArgs:@[@"test"]]; }; //received, error handling [hubConnection start]; When the app starts the user is not logged in and there is no open SignalR connection. The users logs in by calling a Login service in the server which makes use of WebSecurity.Login method. If the login service returns success I then make the above call to SignalR Hub and I get the server error 500 with description "The ConnectionId is in the incorrect format.". The full server stacktrace is the following: Exception information: Exception type: InvalidOperationException Exception message: The ConnectionId is in the incorrect format. at Microsoft.AspNet.SignalR.PersistentConnection.GetConnectionId(HostContext context, String connectionToken) at Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequest(HostContext context) at Microsoft.AspNet.SignalR.Hubs.HubDispatcher.ProcessRequest(HostContext context) at Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequest(IDictionary`2 environment) at Microsoft.Owin.Mapping.MapMiddleware.<Invoke>d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult ar) at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Request information: Request URL: http://myserverip/signalr/signalr/connect?transport=webSockets&connectionToken=axJs EQMZxpmUopL36owSUkdhNs85E0fyB2XvV5R5znZfXYI/CiPbTRQ3kASc3 mq60cLkZU7coYo1P fbC0U1LR2rI6WIvCNIMOmv/mHut/Unt9mX3XFkQb053DmWgCan5zHA==&connectionData=[{"Name":"testhub"}] Request path: /signalr/signalr/connect User host address: User: Is authenticated: False Authentication Type: Thread account name: IIS APPPOOL\DefaultAppPool Thread information: Thread ID: 14 Thread account name: IIS APPPOOL\DefaultAppPool Is impersonating: True Stack trace: at Microsoft.AspNet.SignalR.PersistentConnection.GetConnectionId(HostContext context, String connectionToken) at Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequest(HostContext context) at Microsoft.AspNet.SignalR.Hubs.HubDispatcher.ProcessRequest(HostContext context) at Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequest(IDictionary`2 environment) at Microsoft.Owin.Mapping.MapMiddleware.<Invoke>d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult ar) at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) I understand this is some kind of authentication and user identity mismatching but up to now I have found no way of solving it. All other questions suggest stoping the opened connection when the user identity changes but as I mentioned above I have no open connection before the user logs in successfully. Any help would be much appreciated. Thank you.

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• WPF WriteableBitmap Memory Leak?

  - by Mario

  Hello, everyone! I'm trying to figure out how to release a WriteableBitmap memory. In the next section of code I fill the backbuffer of a WriteableBitmap with a really large amount of data from "BigImage" (3600 * 4800 px, just for testing) If I comment the lines where bitmap and image are equaled to null, the memory it´s not release and the application consumes ~230 MB, even when Image and bitmap are no longer used! As you can see at the end of the code its necessary to call GC.Collect() to release the memory. So the question is, what is the right way to free the memory used by a WriteableBitmap object? Is GC.Collect() the only way? Any help would be great. PS. Sorry for my bad english. private void buttonTest_Click(object sender, RoutedEventArgs e) { Image image = new Image(); image.Source = new BitmapImage(new Uri("BigImage")); WriteableBitmap bitmap = new WriteableBitmap( (BitmapSource)image.Source); bitmap.Lock(); // Bitmap processing bitmap.Unlock(); image = null; bitmap = null; GC.Collect(); }

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• C# TCP Hole Punch (NAT Traversal) Library or something?

  - by user293531

  I want to do TCP Hole Punching (NAT Traversal) in C#. It can be done with a rendevouzs server if needed. I found http://sharpstunt.codeplex.com/ but can not get this to work. Ideally i need some method which i give a PortNumber (int) as parameter that after a call to this method is available ("Port Forwarded") at the NAT. It would be also ok if the methode just returns some port number which is then available at the NAT. Has anybody done this in C# ? Can you give me working examples for sharpstunt or something else? Thank you

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• Ant and Flex-4 problem, MXMLC.jar not found !

  - by Ali

  Hi all, I updated a flex application from flex 3.5 to flex 4.0. We are using ant for compiling our project and we have a mxmlc task to handle the flex part. After the upgrade, our mxmlc task broke. Here is the task definition: <taskdef resource="flexTasks.tasks"> <classpath> <pathelement path="${FLEX_HOME}/ant/lib/flexTasks.jar"/> <pathelement path="${FLEX_HOME}/lib/flexTasks.jar"/> <fileset dir="${FLEX_HOME}/lib"> <include name="**/*.jar"/> </fileset> </classpath> </taskdef> And here is mxmlc task <mxmlc file="${src}/Main.mxml" output="${build}/main.swf" debug="true" target-player="10" services="../src/main/webapp/WEB-INF/flex/services-config.xml" context-root="/" > <compiler.library-path dir="${lib}"> <include name="*.swc"/> </compiler.library-path> <compiler.library-path dir="${FLEX_HOME}/frameworks/libs"> <include name="*.swc"/> </compiler.library-path> <compiler.library-path dir="${FLEX_HOME}/frameworks/libs/player/10.0"> <include name="*.swc"/> </compiler.library-path> <compiler.library-path dir="${FLEX_HOME}/frameworks/locale"> <include name="**/*"/> </compiler.library-path> </mxmlc> And we are getting: The class not found in jar file: mxmlc.jar I checked the ${FLEX_HOME}/lib folder and I can see the mxmlc.jar file there. I appreciate your comments for resolving this matter, Thanks, -A

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• App using MonoTouch Core Graphics mysteriously crashes

  - by Stephen Ashley

  My app launches with a view controller and a simple view consisting of a button and a subview. When the user touches the button, the subview is populated with scrollviews that display the column headers, row headers, and cells of a spreadsheet. To draw the cells, I use CGBitmapContext to draw the cells, generate an image, and then put the image into the imageview contained in the scrollview that displays the cells. When I run the app on the iPad, it displays the cells just fine, and the scrollview lets the user scroll around in the spreadsheet without any problems. If the user touches the button a second time, the spreadsheet redraws and continues to work perfectly, If, however, the user touches the button a third time, the app crashes. There is no exception information display in the Application Output window. My first thought was that the successive button pushes were using up all the available memory, so I overrode the DidReceiveMemoryWarning method in the view controller and used a breakpoint to confirm that this method was not getting called. My next thought was that the CGBitmapContext was not getting released and looked for a Monotouch equivalent of Objective C's CGContextRelease() function. The closest I could find was the CGBitmapContext instance method Dispose(), which I called, without solving the problem. In order to free up as much memory as possible (in case I was somehow running out of memory without tripping a warning), I tried forcing garbage collection each time I finished using a CGBitmapContext. This made the problem worse. Now the program would crash moments after displaying the spreadsheet the first time. This caused me to wonder whether the Garbage Collector was somehow collecting something necessary to the continued display of graphics on the screen. I would be grateful for any suggestions on further avenues to investigate for the cause of these crashes. I have included the source code for the SpreadsheetView class. The relevant method is DrawSpreadsheet(), which is called when the button is touched. Thank you for your assistance on this matter. Stephen Ashley public class SpreadsheetView : UIView { public ISpreadsheetMessenger spreadsheetMessenger = null; public UIScrollView cellsScrollView = null; public UIImageView cellsImageView = null; public SpreadsheetView(RectangleF frame) : base() { Frame = frame; BackgroundColor = Constants.backgroundBlack; AutosizesSubviews = true; } public void DrawSpreadsheet() { UInt16 RowHeaderWidth = spreadsheetMessenger.RowHeaderWidth; UInt16 RowHeaderHeight = spreadsheetMessenger.RowHeaderHeight; UInt16 RowCount = spreadsheetMessenger.RowCount; UInt16 ColumnHeaderWidth = spreadsheetMessenger.ColumnHeaderWidth; UInt16 ColumnHeaderHeight = spreadsheetMessenger.ColumnHeaderHeight; UInt16 ColumnCount = spreadsheetMessenger.ColumnCount; // Add the corner UIImageView cornerView = new UIImageView(new RectangleF(0f, 0f, RowHeaderWidth, ColumnHeaderHeight)); cornerView.BackgroundColor = Constants.headingColor; CGColorSpace cornerColorSpace = null; CGBitmapContext cornerContext = null; IntPtr buffer = Marshal.AllocHGlobal(RowHeaderWidth * ColumnHeaderHeight * 4); if (buffer == IntPtr.Zero) throw new OutOfMemoryException("Out of memory."); try { cornerColorSpace = CGColorSpace.CreateDeviceRGB(); cornerContext = new CGBitmapContext (buffer, RowHeaderWidth, ColumnHeaderHeight, 8, 4 * RowHeaderWidth, cornerColorSpace, CGImageAlphaInfo.PremultipliedFirst); cornerContext.SetFillColorWithColor(Constants.headingColor.CGColor); cornerContext.FillRect(new RectangleF(0f, 0f, RowHeaderWidth, ColumnHeaderHeight)); cornerView.Image = UIImage.FromImage(cornerContext.ToImage()); } finally { Marshal.FreeHGlobal(buffer); if (cornerContext != null) { cornerContext.Dispose(); cornerContext = null; } if (cornerColorSpace != null) { cornerColorSpace.Dispose(); cornerColorSpace = null; } } cornerView.Image = DrawBottomRightCorner(cornerView.Image); AddSubview(cornerView); // Add the cellsScrollView cellsScrollView = new UIScrollView (new RectangleF(RowHeaderWidth, ColumnHeaderHeight, Frame.Width - RowHeaderWidth, Frame.Height - ColumnHeaderHeight)); cellsScrollView.ContentSize = new SizeF (ColumnCount * ColumnHeaderWidth, RowCount * RowHeaderHeight); Size iContentSize = new Size((int)cellsScrollView.ContentSize.Width, (int)cellsScrollView.ContentSize.Height); cellsScrollView.BackgroundColor = UIColor.Black; AddSubview(cellsScrollView); CGColorSpace colorSpace = null; CGBitmapContext context = null; CGGradient gradient = null; UIImage image = null; int bytesPerRow = 4 * iContentSize.Width; int byteCount = bytesPerRow * iContentSize.Height; buffer = Marshal.AllocHGlobal(byteCount); if (buffer == IntPtr.Zero) throw new OutOfMemoryException("Out of memory."); try { colorSpace = CGColorSpace.CreateDeviceRGB(); context = new CGBitmapContext (buffer, iContentSize.Width, iContentSize.Height, 8, 4 * iContentSize.Width, colorSpace, CGImageAlphaInfo.PremultipliedFirst); float[] components = new float[] {.75f, .75f, .75f, 1f, .25f, .25f, .25f, 1f}; float[] locations = new float[]{0f, 1f}; gradient = new CGGradient(colorSpace, components, locations); PointF startPoint = new PointF(0f, (float)iContentSize.Height); PointF endPoint = new PointF((float)iContentSize.Width, 0f); context.DrawLinearGradient(gradient, startPoint, endPoint, 0); context.SetLineWidth(Constants.lineWidth); context.BeginPath(); for (UInt16 i = 1; i <= RowCount; i++) { context.MoveTo (0f, iContentSize.Height - i * RowHeaderHeight + (Constants.lineWidth/2)); context.AddLineToPoint((float)iContentSize.Width, iContentSize.Height - i * RowHeaderHeight + (Constants.lineWidth/2)); } for (UInt16 j = 1; j <= ColumnCount; j++) { context.MoveTo((float)j * ColumnHeaderWidth - Constants.lineWidth/2, (float)iContentSize.Height); context.AddLineToPoint((float)j * ColumnHeaderWidth - Constants.lineWidth/2, 0f); } context.StrokePath(); image = UIImage.FromImage(context.ToImage()); } finally { Marshal.FreeHGlobal(buffer); if (gradient != null) { gradient.Dispose(); gradient = null; } if (context != null) { context.Dispose(); context = null; } if (colorSpace != null) { colorSpace.Dispose(); colorSpace = null; } // GC.Collect(); //GC.WaitForPendingFinalizers(); } UIImage finalImage = ActivateCell(1, 1, image); finalImage = ActivateCell(0, 0, finalImage); cellsImageView = new UIImageView(finalImage); cellsImageView.Frame = new RectangleF(0f, 0f, iContentSize.Width, iContentSize.Height); cellsScrollView.AddSubview(cellsImageView); } private UIImage ActivateCell(UInt16 column, UInt16 row, UIImage backgroundImage) { UInt16 ColumnHeaderWidth = (UInt16)spreadsheetMessenger.ColumnHeaderWidth; UInt16 RowHeaderHeight = (UInt16)spreadsheetMessenger.RowHeaderHeight; CGColorSpace cellColorSpace = null; CGBitmapContext cellContext = null; UIImage cellImage = null; IntPtr buffer = Marshal.AllocHGlobal(4 * ColumnHeaderWidth * RowHeaderHeight); if (buffer == IntPtr.Zero) throw new OutOfMemoryException("Out of memory: ActivateCell()"); try { cellColorSpace = CGColorSpace.CreateDeviceRGB(); // Create a bitmap the size of a cell cellContext = new CGBitmapContext (buffer, ColumnHeaderWidth, RowHeaderHeight, 8, 4 * ColumnHeaderWidth, cellColorSpace, CGImageAlphaInfo.PremultipliedFirst); // Paint it white cellContext.SetFillColorWithColor(UIColor.White.CGColor); cellContext.FillRect(new RectangleF(0f, 0f, ColumnHeaderWidth, RowHeaderHeight)); // Convert it to an image cellImage = UIImage.FromImage(cellContext.ToImage()); } finally { Marshal.FreeHGlobal(buffer); if (cellContext != null) { cellContext.Dispose(); cellContext = null; } if (cellColorSpace != null) { cellColorSpace.Dispose(); cellColorSpace = null; } // GC.Collect(); //GC.WaitForPendingFinalizers(); } // Draw the border on the cell image cellImage = DrawBottomRightCorner(cellImage); CGColorSpace colorSpace = null; CGBitmapContext context = null; Size iContentSize = new Size((int)backgroundImage.Size.Width, (int)backgroundImage.Size.Height); buffer = Marshal.AllocHGlobal(4 * iContentSize.Width * iContentSize.Height); if (buffer == IntPtr.Zero) throw new OutOfMemoryException("Out of memory: ActivateCell()."); try { colorSpace = CGColorSpace.CreateDeviceRGB(); // Set up a bitmap context the size of the whole grid context = new CGBitmapContext (buffer, iContentSize.Width, iContentSize.Height, 8, 4 * iContentSize.Width, colorSpace, CGImageAlphaInfo.PremultipliedFirst); // Draw the original grid into the bitmap context.DrawImage(new RectangleF(0f, 0f, iContentSize.Width, iContentSize.Height), backgroundImage.CGImage); // Draw the cell image into the bitmap context.DrawImage(new RectangleF(column * ColumnHeaderWidth, iContentSize.Height - (row + 1) * RowHeaderHeight, ColumnHeaderWidth, RowHeaderHeight), cellImage.CGImage); // Convert the bitmap back to an image backgroundImage = UIImage.FromImage(context.ToImage()); } finally { Marshal.FreeHGlobal(buffer); if (context != null) { context.Dispose(); context = null; } if (colorSpace != null) { colorSpace.Dispose(); colorSpace = null; } // GC.Collect(); //GC.WaitForPendingFinalizers(); } return backgroundImage; } private UIImage DrawBottomRightCorner(UIImage image) { int width = (int)image.Size.Width; int height = (int)image.Size.Height; float lineWidth = Constants.lineWidth; CGColorSpace colorSpace = null; CGBitmapContext context = null; UIImage returnImage = null; IntPtr buffer = Marshal.AllocHGlobal(4 * width * height); if (buffer == IntPtr.Zero) throw new OutOfMemoryException("Out of memory: DrawBottomRightCorner()."); try { colorSpace = CGColorSpace.CreateDeviceRGB(); context = new CGBitmapContext (buffer, width, height, 8, 4 * width, colorSpace, CGImageAlphaInfo.PremultipliedFirst); context.DrawImage(new RectangleF(0f, 0f, width, height), image.CGImage); context.BeginPath(); context.MoveTo(0f, (int)(lineWidth/2f)); context.AddLineToPoint(width - (int)(lineWidth/2f), (int)(lineWidth/2f)); context.AddLineToPoint(width - (int)(lineWidth/2f), height); context.SetLineWidth(Constants.lineWidth); context.SetStrokeColorWithColor(UIColor.Black.CGColor); context.StrokePath(); returnImage = UIImage.FromImage(context.ToImage()); } finally { Marshal.FreeHGlobal(buffer); if (context != null){ context.Dispose(); context = null;} if (colorSpace != null){ colorSpace.Dispose(); colorSpace = null;} // GC.Collect(); //GC.WaitForPendingFinalizers(); } return returnImage; } }

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• What disk image should I use with VirtualBox, VDI, VMDK, VHD or HDD?

  - by Sorin Sbarnea

  Latest versions of VirtualBox supports several formats for virtual disks, but they forgot to provide a comparison between them. VDI VMDK VHD HDD Now, I am interested about a recommendation or comparison that considers the following: be able to use dynamic sizing be able to have snapshots be able to move my virtual machine to another OS or even another free virtualization solution with minimal effort (probably something that would run fine on Ubuntu). performance

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• How to remove Thumbnail property of a JPEG image without distrubing other Exif data in C ++ .net.

  - by Ravi shankar

  I have an application which edits the metadata part of the JPEG image. I have to remove the thumbnail metadata with out disturbing other metadata. I have tried out the code below but was not successful in removing thumbnail metadata. can some help me out in solving this query thanks in advance. array<String^>^ query = gcnew array<String^>(4); query[0] = "/app1/ifd/tiff:"; query[1] = "/app1/ifd/tiff/subifd:"; query[2] = "/ifd/tiff:"; query[3] = "/ifd/tiff/subifd:"; for each (String^ SetQuery in query) { metaData->RemoveQuery(SetQuery + "{uint=256}"); metaData->RemoveQuery(SetQuery + "{uint=257}"); metaData->RemoveQuery(SetQuery + "{uint=258}"); metaData->RemoveQuery(SetQuery + "{uint=259}"); metaData->RemoveQuery(SetQuery + "{uint=273}"); metaData->RemoveQuery(SetQuery + "{uint=262}"); metaData->RemoveQuery(SetQuery + "{uint=277}"); metaData->RemoveQuery(SetQuery + "{uint=278}"); metaData->RemoveQuery(SetQuery + "{uint=279}"); metaData->RemoveQuery(SetQuery + "{uint=282}"); metaData->RemoveQuery(SetQuery + "{uint=283}"); metaData->RemoveQuery(SetQuery + "{uint=284}"); metaData->RemoveQuery(SetQuery + "{uint=296}"); metaData->RemoveQuery(SetQuery + "{uint=513}"); metaData->RemoveQuery(SetQuery + "{uint=514}"); metaData->RemoveQuery(SetQuery + "{uint=529}"); metaData->RemoveQuery(SetQuery + "{uint=530}"); metaData->RemoveQuery(SetQuery + "{uint=531}"); metaData->RemoveQuery(SetQuery + "{uint=532}"); }

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• OpenCV : How to display webcam capture in windows form application?

  - by sneixum

  generally we display webcam or video motion in opencv windows with : CvCapture* capture = cvCreateCameraCapture(0); cvNamedWindow( "title", CV_WINDOW_AUTOSIZE ); cvMoveWindow("title",x,y); while(1) { frame = cvQueryFrame( capture ); if( !frame ) { break; } cvShowImage( "title", frame ); char c = cvWaitKey(33); if( c == 27 ) { break; } } i tried to use pictureBox that is successful to display image in windows form with this : pictureBox1-Image = gcnew System::Drawing::Bitmap( image-width,image-height,image-widthStep,System::Drawing::Imaging::PixelFormat::Undefined, ( System::IntPtr ) image- imageData); but when im trying to display captured image from video it wont works, here is the source : CvCapture* capture = cvCreateCameraCapture(0); while(1) { frame = cvQueryFrame( capture ); if( !frame ) { break; } pictureBox1->Image = gcnew System::Drawing::Bitmap( frame->width,frame->height,frame->widthStep,System::Drawing::Imaging::PixelFormat::Undefined, ( System::IntPtr ) frame-> imageData); char c = cvWaitKey(33); if( c == 27 ) { break; } } is there anyway to use windows form instead opencv windows to show video or webcam? or is there something wrong with my code? thanks for your help.. :)

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• UIImageWriteToSavedPhotosAlbum with malloc_error

  - by lbalves

  I have an NIB file with a button. When I click this button, the setWallpaper: selector is called. Everything works as expected (the image is saved), excepte by the error thrown by malloc. malloc: *** error for object 0x184d000: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug I've set a breakpoint at malloc_error_break, but I don't understand anything from the debugger. I couldn't even find the object 0x184d000. Does anyone know why is this happening? I had also tried to retain the UIImage before sending it to UIImageWriteToSavedPhotosAlbum, but without success. My code is below: - (IBAction)setWallpaper:(id)sender { UIImage *image = [UIImage imageNamed:@"wallpaper_01.png"]; UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil); } - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Galo!!!",@"Saved image message: title") message:NSLocalizedString(@"Now, check your \"saved photos\" group at \"photos\" app in your iPhone and select the actions menu > set as wallpaper.",@"Saved image message") delegate:nil cancelButtonTitle:NSLocalizedString(@"OK",@"OK Button") otherButtonTitles:nil]; [alertView show]; [alertView release]; }

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• Is there a library for notification/alert in .NET?

  - by sajid.nizami

  I need to design a notifications framework written solely in .Net. I was wondering is there were some libraries already available to ease in creating rules for the notifications. PS: Anything other than SQL Server Notifications please. Note: Notifications as in Emails and SMS notifications.

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• Send and Receive JSON using RestClient and Sinatra

  - by lakshmanan

  Hi, I am trying to send a JSON data to a Sinatra app by RestClient ruby API. At client(client.rb) (using RestClient API) response = RestClient.post 'http://localhost:4567/solve', jdata, :content_type => :json, :accept => :json At server (Sinatra) require "rubygems" require "sinatra" post '/solve/:data' do jdata = params[:data] for_json = JSON.parse(jdata) end I get the following error /Library/Ruby/Gems/1.8/gems/rest-client-1.5.1/lib/restclient/abstract_response.rb:53:in `return!': Resource Not Found (RestClient::ResourceNotFound) from /Library/Ruby/Gems/1.8/gems/rest-client-1.5.1/lib/restclient/request.rb:193:in `process_result' from /Library/Ruby/Gems/1.8/gems/rest-client-1.5.1/lib/restclient/request.rb:142:in `transmit' from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/net/http.rb:543:in `start' from /Library/Ruby/Gems/1.8/gems/rest-client-1.5.1/lib/restclient/request.rb:139:in `transmit' from /Library/Ruby/Gems/1.8/gems/rest-client-1.5.1/lib/restclient/request.rb:56:in `execute' from /Library/Ruby/Gems/1.8/gems/rest-client-1.5.1/lib/restclient/request.rb:31:in `execute' from /Library/Ruby/Gems/1.8/gems/rest-client-1.5.1/lib/restclient.rb:72:in `post' from client.rb:52 All I want is to send JSON data and receive a JSON data back using RestClient and Sinatra..but whatever I try, I get the above error. I m stuck with this for 3 hours. Please help

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• What are ProductCode & UpgradeCode & GUID? How to detect if certain application/library is already i

  - by claws

  I've already gone through: http://stackoverflow.com/questions/211192/check-if-the-application-is-already-installed http://stackoverflow.com/questions/488717/detecting-if-a-program-is-already-installed-with-nsis http://nsis.sourceforge.net/Add_uninstall_information_to_Add/Remove_Programs My questions are little more in depth and little more general. So, as you understood my problem is that I want to check if "Certain Applications" are already installed on the user's machine? I'm generating the installer using Advanced Installer. First few questions: What is Upgrade Code? Advanced installer has option, Product Version (identify by Upgrade Code) What is Product Code? Advanced installer Product Version (identify by Product Code) Component is installed : GUID. What is GUID? All the above three has values like this: {49EB7A6A-1CEF-4A1E-9E89-B9A4993963E3} I don't know what these values are but it seems that computer is recognizing software using this kind of strange ID. My required applications are MySQL DBMS MySQL .NET Connector One fact that I discovered is Upgrade Code & Product Code can be extracted from its "msi installer". MySQL Server Installer = mysql-5.1.43-win32.msi Upgrade Code = {49EB7A6A-1CEF-4A1E-9E89-B9A4993963E3} Product Code = {0ECED7D8-FF53-4DC9-958E-C2177F528DE4} GUID (for component Installed) = ???? Uninstall Path = HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{0ECED7D8-FF53-4DC9-958E-C2177F528DE4} Installer = mysql-5.1.46-win32.msi Upgrade Code = {49EB7A6A-1CEF-4A1E-9E89-B9A4993963E3} Product Code = {EA8FDE5A-2B33-4EDD-B7E7-8D179DF731A5} GUID (for component Installed) = ???? Uninstall Path = HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{EA8FDE5A-2B33-4EDD-B7E7-8D179DF731A5} Installer = mysql-essential-5.1.46-win32.msi Upgrade Code = {49EB7A6A-1CEF-4A1E-9E89-B9A4993963E3} Product Code = {AD33AF2C-6485-4106-B012-1D9CDC88A454} GUID (for component Installed) = ???? Uninstall Path = HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{AD33AF2C-6485-4106-B012-1D9CDC88A454} Installer = mysql-essential-5.1.46-win32.msi Upgrade Code = {49EB7A6A-1CEF-4A1E-9E89-B9A4993963E3} Product Code = {9A4DA7EF-A7B9-4282-90AD-10976AA24E69} GUID (for component Installed) = ???? Uninstall Path = HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{9A4DA7EF-A7B9-4282-90AD-10976AA24E69} Observation from above data: UpgradeCode of a software is constant & is irrespective of its version. ProductCode is version specific & it is used by the MSI internally which is actually reasonable because. MSI allows applications of different versions to be installed side by side. I don't know how to find GUID. MySQL ADO .NET Driver Installer = mysql.data.5.2.5.msi Upgrade Code = --- Product Code = {5FD88490-011C-4DF1-B886-F298D955171B} GUID (for component Installed) = ???? Installer = mysql.data.6.2.2.msi Upgrade Code = --- Product Code = {5FD88490-011C-4DF1-B886-F298D955171B} GUID (for component Installed) = ???? UninstallPath =HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{5FD88490-011C-4DF1-B886-F298D955171B} Installer = mysql.data.6.2.3.msi Upgrade Code = --- Product Code = {5FD88490-011C-4DF1-B886-F298D955171B} GUID (for component Installed) = ???? Observations from above data: - surprisingly, it couldn't find UpgradeCode from installer of mysql.data.*.msi. I wonder why? This contradicts with my above observation. - ProductCode for all different versions is same here. This again contradicts my above observations. -I still don't know how to find GUID. Now, What exactly are these ProductCode & UpgradeCode & GUID. Which denotes what? Why are above observations contradicting? I don't care about versions. I don't want to depend on Application Name then how do I check if MySQL driver & MySQL ADO .NET. Does detection become simple if they are .NET assemblies? How to do then? I don't want to ship the assemblies with my deployed files.

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• UIImage cropping on user selected rectangle in iphone?

  - by Rajendra Bhole

  Hi, I developing an small application in which i want to crop the UIImage captured by imagePickerControllerSourceTypeOfCamera. The UIImage should crop by user selected crop area or cropped rectangle. That means first user capture the image from the camera.Then on captured image the user selected an rectangle having color gray.That image(image data) should crop from that gray colored rectangle. My under develop code is as follows. -(IBAction) getPhoto:(id)sender { UIImagePickerController* imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.delegate = self; if((UIButton *) sender == btnphotoAlbum) { imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; } else { imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera; } imagePickerController.allowsImageEditing = YES; //imagePickerController.toolbar.barStyle =UIBarStyleBlackOpaque; //UIToolbar *toolBar=[[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 20, 320)]; //imagePickerController. [self presentModalViewController:imagePickerController animated:YES]; } (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo { UIImage *selectedImage = image; UIImage *originalImage = [editingInfo objectForKey:@"UIImagePickerControllerOriginalImage"]; NSValue *cropRect = [editingInfo objectForKey:UIImagePickerControllerCropRect]; CGRect theRect = [cropRect CGRectValue]; //captureImage.image =[info objectForKey:@"UIImagePickerControllerOriginalImage"]; [picker dismissModalViewControllerAnimated:YES]; } How i crop the image?

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• How effective can this Tagging solution be?

  - by Pablo

  Im working on an image sharing site and want to implement tagging for the images. I've read Questions #20856 and #2504150 I have few concerns with the approach on the questions above. First of all it looks easy to link an image to a tag. However getting images by tag relation is not as easy. Not easy because you will have to get the image-to-tag relation from one table and then make a big query with a bunch of OR statements( one OR for every image). Before i even research the tagging topic i started testing the following method: This tables as examples: Table: Image Columns: ItemID, Title, Tags Table: Tag Columns: TagID, Name The Tags column in the Image table takes a string with multiple tagID from the Tag table enclosed by dashes(-). For example: -65-25-105- Links an image with the TagID 65,25 and 105. With this method i find it easier to get images by tag as i can get the TagID with one query and get all the images with another simple query like: SELECT * FROM Image WHERE Tags LIKE %-65-% So if i use this method for tagging, How effective this is? Is querying by LIKE %-65-% a slow process? What problems can i face in the future?

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• Is this error caused by a 64-bit library being accessed by a Java program running in a 32-bit JVM?

  - by Mike

  I'm trying to create a simple Java app that uses JNI to call some native functions. I've followed the examples in the JNI Programming Guide and can't seem to get them to work. I have the following Hello World program, written in Java: class HelloWorld { private native void print(); public static void main(String [] args) { new HelloWorld().print(); } static { System.load("/home/mike/Desktop/libHelloWorld.so"); } } I compile it using javac HelloWorld.java, just like normal. Then I run javah -jni HelloWorld, and finally the following: gcc34 -shared -fpic -o libHelloWorld.so -I/<path to JDK>/include -I/<path to JDK>/include/linux HelloWorld.c gcc34 is the name of the GCC program on my machine here at work (I don't control that) and I obviously place the real path to the JDK in that command. When I run my program, using the standard java HelloWorld, I get an error saying the following: Exception in thread "main" java.lang.UnsatisfiedLinkError: /home/mike/Desktop/libHelloWorld.so: /home/mike/Desktop/libHelloWorld.so: wrong ELF class: ELFCLASS64 (Possible causes: architecture word width mismatch) at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1778) at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1674) at java.lang.Runtime.load0(Runtime.java:770) at java.lang.System.load(System.java:1003) at HelloWorld.<clinit>(HelloWorld.java:8) Could not find the main class: HelloWorld. Program will exit. I know I'm running a 32-bit JVM (and unfortunately, as of right now, I'm not allowed to get a 64-bit JVM). I tried telling GCC to compile in 32-bit mode using the "-m32" option, but we don't have (and again, can't get) what we need for that. Does this sound like a 32/64-bit conflict or something else?

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• iPhone: CATiledLayer/UIScrollView wont scroll after zooming and only zooms to anchor point

  - by Brodie4598

  Here is the problem... I am using CA Tiled Layer to display a large jpg. The view loads okay, and when I go to scroll around, it works fine. However, as soon as I zoom in or out once, it scrolls to the top left (to the anchor point) and will not scroll at all. The zooming works fine, but I just cannot scroll. Here is my code: #import <QuartzCore/QuartzCore.h> #import "PracticeViewController.h" @implementation practiceViewController //@synthesize image; - (void)viewDidLoad { NSString *path = [[NSBundle mainBundle] pathForResource:@"H-5" ofType:@"jpg"]; NSData *data = [NSData dataWithContentsOfFile:path]; image = [UIImage imageWithData:data]; CGRect pageRect = CGRectMake(0, 0, image.size.width, image.size.height); CATiledLayer *tiledLayer = [CATiledLayer layer]; tiledLayer.anchorPoint = CGPointMake(0.0f, 1.0f); tiledLayer.delegate = self; tiledLayer.tileSize = CGSizeMake(1000, 1000); tiledLayer.levelsOfDetail = 6; tiledLayer.levelsOfDetailBias = 0; tiledLayer.bounds = pageRect; tiledLayer.transform = CATransform3DMakeScale(1.0f, -1.0f, 0.3f); myContentView = [[UIView alloc] initWithFrame:self.view.bounds]; [myContentView.layer addSublayer:tiledLayer]; UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds]; scrollView.delegate = self; scrollView.contentSize = pageRect.size; scrollView.minimumZoomScale = .2; scrollView.maximumZoomScale = 1; [scrollView addSubview:myContentView]; [self.view addSubview:scrollView]; } - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView { return myContentView; } - (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx { NSString *path = [[NSBundle mainBundle] pathForResource:@"H-5" ofType:@"jpg"]; NSData *data = [NSData dataWithContentsOfFile:path]; image = [UIImage imageWithData:data]; CGRect imageRect = CGRectMake (0.0, 0.0, image.size.width, image.size.height); CGContextDrawImage (ctx, imageRect, [image CGImage]); } @end

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• Is there a C# datetime library that can handle dates from present to 12,000 bc?

  - by Jason Hernandez

  That's pretty much it. I don't need high precision in the Paleolithic Era, but I would like to be able to represent these date without jumping through too many hoops. Thanks, Jason

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