Font size for Chinese words

[jajazhou]

i try to set the font style as : e.SetStyles( PrintStyle.DoubleHeight | PrintStyle.DoubleWidth ),

the words include English & Chinese words, but the Chinese words cannot show as double Hight & double width, any solution?

[linycyc]

hi jajazhou I want to ask you how to print the tradition chinese word ? I try to encode utf-8 and big5, but not working, i use virtual printer form RawBT app

Thanks~

[jajazhou]

hi jajazhou I want to ask you how to print the tradition chinese word ? I try to encode utf-8 and big5, but not working, i use virtual printer form RawBT app

Thanks~

@linycyc changed this function:

    public virtual byte[] Print(string data)
    {
        // Fix OSX or Windows-style newlines
        data = data.Replace("\r\n", "\n");
        data = data.Replace("\r", "\n");

        // TODO: Sanitize...
        return data.ToCharArray().Select(x => (byte)x).ToArray();
    }

to:

    public virtual byte[] Print(string data)
    {
        // Fix OSX or Windows-style newlines
        data = data.Replace("\r\n", "\n");
        data = data.Replace("\r", "\n");

        // TODO: Sanitize...
        return Encoding.GetEncoding("BIG5").GetBytes(data);
    }

[jajazhou]

I solved this problem myself, add the function SetFonSize to class BaseCommandEmitter,

public virtual byte[] SetFonSize(FontStyle style) => new byte[] { Cmd.GS, Chars.StyleMode, (byte)style };

and the FontStyle enum as :

[Flags]
public enum FontStyle
{
    None         = 0,
    DoubleHeight = 1,
    DoubleWidth  = 1 << 4 
}

print example: `

             ..........

              e.SetFonSize( FontStyle.None), // reset to normal size

              e.SetFonSize( FontStyle.DoubleWidth), // set to double width

              e.PrintLine(somewords),

              e.SetFonSize( FontStyle.None),`  // reset to normal size

              ..........

[linycyc]

Hi @jajazhou

I try to use the new function, but the RawBT app still not show traditional chinese whether i need to use real pos printer device for my test?

  public virtual byte[] Print(string data)
    {
        // Fix OSX or Windows-style newlines
        data = data.Replace("\r\n", "\n");
        data = data.Replace("\r", "\n");

        // TODO: Sanitize...
        return Encoding.GetEncoding("BIG5").GetBytes(data);
    }

[jajazhou]

Hi @jajazhou

I try to use the new function, but the RawBT app still not show traditional chinese whether i need to use real pos printer device for my test?

  public virtual byte[] Print(string data)
    {
        // Fix OSX or Windows-style newlines
        data = data.Replace("\r\n", "\n");
        data = data.Replace("\r", "\n");

        // TODO: Sanitize...
        return Encoding.GetEncoding("BIG5").GetBytes(data);
    }

Yes, i think so. your printer must be supported for ESC/POS standard by Epson. and, maybe you should register encodingProvider(.net core 3.1).

[lukevp]

@jajazhou Would you be interested in contributing the FontSize changes as a PR? Would love to get you registered as a contributor in GitHub. If not, I can add support for this myself. Appreciate the contribution!