B64 or Z64 with Zebra SDK ??

Hello,

For me with a PNG file (no transparency) it is working as follows, once you did the read to end:

Calling the method to get ZPL:

var zpl = GetImgZpl(text);
Console.WriteLine(zpl);

The method:

private string GetImgZpl(string imgTxt)
{
    return "^XA"
        + "~" + imgTxt
        + "^FO70,70^IME:IMAGE.PNG^FS"
        + "^IDE:IMAGE.PNG"
        + "^XZ";
}

Generated ZPL:

^XA
~ DYE:IMAGE p p 2764  :B64:iVBORw0KGgoAA (lots of characters...) LzRYWmUgMAAAAASUVORK5CYII=:e11c
^FO70,70
^IME:IMAGE.PNG
^FS
^IDE:IMAGE.PNG
^XZ

This ZPL is sent to the printer and works fine. There are some escaped characters in the formatting above, but the point is that I just get the command as it is returned by PrinterUtil method without any additional processing. The ZPL loads the image in the printer, prints it, then delete from memory (E:).

Good luck,

Diego

Hi Robin.

I'm trying to have a ZPL code from a JPG image ....but the result of the ConvertGraphic funciton is not correctly printed by our Zebra ZT230.

These are the few code lines (Vb.Net - I wrote the ZPL in a file):

        Dim Fs As System.IO.FileStream

        Dim Ms As New System.IO.MemoryStream

        Dim Im As Sdk.Graphics.ZebraImageI

        Im = ZebraImageFactory.GetImage("C:\Zebra\150_00_00_02.jpg")

        Sdk.Printer.PrinterUtil.ConvertGraphic("c:\Zebra\IMAGE.PNG", Im, 20, 20, Ms)

        Fs = New IO.FileStream("C:\Zebra\ZPL.txt", IO.FileMode.Create)

        Ms.WriteTo(Fs)

I tried to put the result of the ZPL.txt file after the ZPL command ^GFA ....but I don't know how to set the three parameters of the ^GF command ....and ....in any case the image printed is not the same as the source jpg.

Where I go wrong ?

Thank you in advance !

Hi Daniel, You can use the storeImage() command before sending the zpl and then use the ^FO in combination with the ^IM command to modify the location in your ZPL:

^XA...

^FO10,608^IME:IMAGE.PNG^FS

...^XZ

X and Y coordinates are generally for the top left corner of the image.

Or you can use the printImage() inside format to place it.

String zplStart = "^XA...";

String zplEnd = "...^XZ";

printer.getConnection.write(zplStart.getBytes());

printer.printImage("myImage.png", 10, 608, 0, 0, true);

printer.getConnection.write(zplEnd.getBytes());

I can't give you specifics for the X and Y locations because I don't know how big your receipt is, or exactly how far down the page it is.

Hi Tim, Sorry this is coming to you so late, but it might help others who need it.  The Zebra .Net SDK has a ConvertGraphic() function to convert an image into a B64 encoded PNG image. You can use this without ever opening the connection to a printer.  It does add a ZPL download header, but you can remove it by searching for the string ":B64:" and removing everything before that.  The filePathOnPrinter must have the PNG extension to convert to a B64 image.

MemoryStream ms = new MemoryStream();
ZebraImageI image = ZebraImageFactory.GetImage(pathOnComputer);
PrinterUtil.ConvertGraphic("E:IMAGE.PNG", image, ms);
ms.Write(buffer, 0, ms.Length);

There are also likely 3rd party libraries to do this.