Trying to create a pdf in different languages in flutter - flutter

Question

I want to print Hindi language in my PDF, I've also tried using Raleway-Regular.ttf font by Google but it also didn't worked.
final font = await rootBundle.load("fonts/ARIAL.TTF");
final ttf = pw.Font.ttf(font);
pdf.addPage(
pw.MultiPage(
pageFormat: PdfPageFormat.a4,
margin: pw.EdgeInsets.all(32),
build: (pw.Context context){
return <pw.Widget>[
pw.Center(
child: pw.Text("मेन",style: pw.TextStyle(fontSize: 16,font: ttf))
),
pw.SizedBox(height: 20),
pw.Center(
child: pw.Text("ABC",style: pw.TextStyle(fontSize: 16))
),
),
),
I'm getting following Error:
***I/flutter (24862): Cannot decode the string to Latin1.
I/flutter (24862): This font does not support Unicode characters.
I/flutter (24862): If you want to use strings other than Latin strings, use a TrueType (TTF) font instead.
I/flutter (24862): See https://github.com/DavBfr/dart_pdf/wiki/Fonts-Management
I/flutter (24862): ---------------------------------------------
E/flutter (24862): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: Invalid argument (string): Contains invalid characters.: "मेन"

Answer 1

I am also facing the same error its because the fonts you are using does not support that language , if you want to use hindi language then you can use hind-regular.ttl font it supports both the fonts hindi and english.
here is the example what i got.
// step 1- add font locatin in pubspec
fonts:
- family: hind
fonts:
- asset: assets/hind.ttf
//step 2-
final pdf = pw.Document();
final font = await rootBundle.load("assets/hind.ttf");
final ttf = pw.Font.ttf(font);
then just apply this ttf in the fontStyle
packages i m using -
import 'package:universal_html/html.dart' as html;
import 'package:pdf/widgets.dart' as pw;
universal_html: ^1.2.3
enter image description here
pdf: ^1.11.1

Answer 2

Some issues are there with Unicode translations . Please take care of it https://github.com/DavBfr/dart_pdf/issues/198
You can use syncfusion pdf library (You need to buy subscription). You will get all kind of support including search,rtl, unicode support .
final font = await rootBundle.load("assets/fonts/hind.ttf");
final ttf = Font.ttf(font);
final pdf = pw.Document();
pw.Text(
'Your text',
textDirection:TextDirection.rtl, // If you need in opp direction like urdu
style: pw.TextStyle(
font: ttf,))

Answer 3

If someone still has this problem
final data = await rootBundle.load('assets/fonts/opensans_regular.ttf');
final dataint = data.buffer.asUint8List(data.offsetInBytes,data.lengthInBytes);
final PdfFont font = PdfTrueTypeFont (date,12);

Answer 4

Most of the language not works well with the flutter pdf plugin
In Tamil language, I face problems when two characters merge.
so, i modified the tff with available tools and replaced that character with that character.
as the result, i can able to get the output
String path = 'assets/custom_Anand_MuktaMalar.ttf';
pw.Font? tamilFont = pw.Font.ttf(await rootBundle.load(path));
pw.Text('உவவுமதி உருவின் ஓங்கல் வெண்குடை'.toPrintPdf)
pdf.addPage(
pw.Page(
theme: pw.ThemeData(defaultTextStyle: pw.TextStyle(font: tamilFont)),
));
for further ref, you can see my project:
https://github.com/anandsubbu007/anand-work/tree/BLOC/tamil_pdf