TurboMagic

If you want to print bitmaps to an ESC/POS printer via sending raw ESP/POS commands you need to send 1 column and 8 rows of the image per byte. Means: there is a command which you tell how many columns youl will send and then you send one byte for each column containing the data for 8 rows bitwise encoded. So if you send bytes with the most significant bit and the last significant bit set but no other bits set with that command you'd get two lines in parallel. But the question would be why to do it that way? Why not use TPrinter's capabilities?

Well, you get something for free! And for quite a lot of folks its good enough. It's also more up to date than previous community editions were.

A solution was found now: The FBDriverLink of the FDConnection used in the application must have Embedded := true as well!

Hello, I'm using D12.1, FireDAC and Firebird 5.0 embedded. I try to create a backup using TFDIBBackup but that fails with this failure message: "Unable to complete network request to host "xnet://Global [FireDAC][Phys][FB]invalid service handle [FireDAC][Phys][FB]invalid service handle" I can successfully create a backup using gbak from command line though. I'm also quite sure creating a backup from my application works when Firebird server is installed. Here's my TFDIBBackup initialization code: constructor TDBBackup.Create(const DatabaseFileName : string; const VendorLib : string); begin inherited Create; FFBDriverLink := TFDPhysFBDriverLink.Create(nil); FFBDriverLink.VendorLib := VendorLib; FFBDriverLink.Embedded := true; FFBBackup := TFDIBBackup.Create(nil); FFBBackup.ConnectTimeout := 0; FFBBackup.Database := DatabaseFileName; FFBBackup.DriverLink := FFBDriverLink; FFBBackup.Password := c_DBPassword; FFBBackup.QueryTimeout := 2; FFBBackup.UserName := c_DBUserName; FFBBackup.Verbose := true; FFBBackup.Protocol := TIBProtocol.ipLocal; FFBBackup.AfterExecute := OnBackupFinishedInternal; FFBBackup.OnProgress := OnBackupProgressInternal; FFBBackup.OnError := OnBackupErrorInternal; FIsBackupRestoreActive := false; end; Vendor lib points to a fbclient.dll which exists and has the other libraries for embedded in the same directory and all other fbclient.dlls on the system are the exact same version and have the exact same other files in their directory: fbclient.dll firebird.conf firebird.msg gbak.exe gfix.exe ib_util.dll icudt63.dll icudt63l.dat icuin63.dll icuuc63.dll isql.exe msvcp140.dll vcruntime140.dll intl\fbintl.conf intl\fbintl.dll plugins\chacha.dll plugins\engine13.dll What am I'm doing wrong? Regular DB SQL queries via FireDac work just fine. Cheers TurboMagic

Hello, this is the same issue as the one described in the German DP (https://www.delphipraxis.net/215286-port-nicht-erzeugt-2.html), but there I don't get any further ideas. So I hope somebody here can help me. I have some application written in Delphi 10.3.3 which provides two endpoints and has worked in the past. One endpoint delivers a simplistic status website and the other can be used to query data via REST. For both the user can configure the port and whether to use HTTPS or not. If HTTPS is used a self signed certivicate is used and the application provides V1.0.2j of the OpenSSL libraries. Now I have the reproduceable case that the port for the REST interface is never created (says netstat -p TCP on the cmd.exe console) and the one for the status website some times is but most of the times isn't. The code for creating both DataSnap server instances is identical and looks like this: if FMyServiceEnabled and (not FRESTServer.Active) then begin FRESTServer.Bindings.Clear; FRESTServer.DefaultPort := FMyServicePort; FRESTServer.Active := True; log.Send(LevelBlue, cCategory, 'REST Server gestartet. Port: ' + FMyServicePort.ToString); end; if FStatusWebsite and (not FWebServer.Active) then begin FWebServer.Bindings.Clear; FWebServer.DefaultPort := FStatusPort; FWebServer.Active := True; log.Send(LevelBlue, cCategory, 'Web Server gestartet. Port: ' + FStatusPort.ToString); end; When looking into the logs generated, they show that this code was actually run. The issue happens on a customers PC and on my own machine as well. With another tool suggested by somebody in German DP (writing in EN 😉 ) I was able to see that both bind ahnd listen are called on the socket. But netstat doesn't show it... What can cause this and how to further diagnose this? Esp. what data snap does?

How is your text output handled within the VST? It could be that you're doing tings in OnGetText which are a bit time consuming.

Hello, if somebody is interested or needs to convert his JavaDoc comments to XMLDOC he might find use of my new little command line utility. It can be found here: https://github.com/MHumm/JavaDoc2XMLDOC Yes, I'm aware that it currently only converts summary, description, parameters and returns sections of JavaDoc and that it is written in procedural style (ok, code got longer than anticipated but it's structured code and contains XMLDOC comments 😉 ). License is Apache 2.0. So you can modify it if necessary.

So the recommendation is still the one from the stack overflow post: to build a static lib, which results in a .a file?

Sorry, but it's now still unclear how to handle iOS in this regards (I don't have the toolchain for this one yet): 1. Can Delphi create a dylib for iOS somebody else wih some other language could consume? (the StackOverflow post doesn't talk about dylibs) I know that it can for Android if creating a normal FMX app and stripping the FMX part out of that. But for iOS? 2. What would speak against .a files? What's the downside of those getting linked into the application of the person consuming those? I simply need to create something somebodfy else in some different language has to use and that needs to work on Android and on iOS. And before investing time into some implementation which will not work on iOS at the end I wanted to get clarification about that one.

Another question turned up now: from the shared objects (.so) I can create for Android I know, that I need to create one for 32 bit and one for 64 bit and need to place them into the right folders on the target device via deployment manager. Both have the same name though. Now what about .a files? When I generate them for 32 and 64 bit they will get output in the ios32 and ios64 or Android32 and Android64 subolders I guess. But the user of them using a different programming environment,, how has he to handle them? Place them into bitnnes/cpu dependant folders and have something conditional in his application so the right variant will be linked in?

Thanks for the answer! Does this mean this is "self contained"? That's how I understood this. For as non package developer it always sounded like packages require that you provide the used RTL packages as well, but I guess this is not the case here?

Thanks for the reply. As I haven't done any iOS development yet I don't have a MAC yet and thus wanted to investigate first whether it is possible for iOS at all. For Android it is possible but as written not via a library/DLL project! That won't properly work! As described one needs to generate a FMX project for this, as each of those generates an SO and then you strip out the FMX part and only grab the generated SO, which in a normal FMX project would be packed into the APK/AAB.

I have some code written in Delphi which should be reused in mobile projects which are unfortunately not written in Delphi. I have found out that for Android you can create a shared object .so. Strangely not via using the DLL project type but by using the normal cross platform GUI type and then stripping off the GUI support. Now the question is, can I achieve something similar for iOS? Can I create a dynamic or static library some other iOS programming environment can consume? I just found this help topic: https://docwiki.embarcadero.com/RADStudio/Sydney/en/API_(*.bpl,_*.dylib,_*.so) Would that be a way? (I haven't developed any packages yet and I would only want to export procedural stuff)

While Marco's blog post is nicely written it's not excactly what I'd need. Threading is not really new to me, but I would have the need to wait in there or so. But the Kastri Timer is something I really should look at. Thanks for bringing that one up!

Thanks for these links. The first one I know and already tried, but it crashes as well, but I need to try to understand their soruce better. I had thought to give TTimer a 2nd try as that one might be easier to understand. The 2nd link is really new to me.