Pdf creation library for dart/flutter 

This library is divided into two parts:

• a low-level Pdf creation library that takes care of the pdf bits generation.
• a Widgets system similar to Flutter’s, for easy high-level Pdf creation.

It can create a full multi-pages document with graphics, images, and text using TrueType fonts. With the ease of use you already know.

See an interactive demo here: https://davbfr.github.io/dart_pdf/.

Use the printing package https://pub.dev/packages/printing for full flutter print and share operation.

The coordinate system is using the internal Pdf unit:

• 1.0 is defined as 1 / 72.0 inch
• you can use the constants for centimeters, millimeters, and inch defined in PdfPageFormat

Installing 

If you want to print the Pdf document on an actual printer with Flutter, follow the instructions at https://pub.dev/packages/printing

1. Add this package to your package’s pubspec.yaml file as described on the installation tab
2. Import the librariesimport 'package:pdf/pdf.dart'; import 'package:pdf/widgets.dart' as pw;

Examples 

final pdf = pw.Document();

pdf.addPage(pw.Page(
      pageFormat: PdfPageFormat.a4,
      build: (pw.Context context) {
        return pw.Center(
          child: pw.Text("Hello World"),
        ); // Center
      })); // Page

To load an image from a file:

final image = PdfImage.file(
  pdf.document,
  bytes: File('test.webp').readAsBytesSync(),
);

pdf.addPage(pw.Page(
    build: (pw.Context context) {
      return pw.Center(
        child: pw.Image(image),
      ); // Center
    })); // Page

To use a TrueType font:

final Uint8List fontData = File('open-sans.ttf').readAsBytesSync();
final ttf = pw.Font.ttf(fontData.buffer.asByteData());

pdf.addPage(pw.Page(
    pageFormat: PdfPageFormat.a4,
    build: (pw.Context context) {
      return pw.Center(
        child: pw.Text('Hello World', style: pw.TextStyle(font: ttf, fontSize: 40)),
      ); // Center
    })); // Page

To save the pdf file:

// On Flutter, use the [path_provider](https://pub.dev/packages/path_provider) library:
//   final output = await getTemporaryDirectory();
//   final file = File("${output.path}/example.pdf");
final file = File("example.pdf");
await file.writeAsBytes(pdf.save());

Encryption and Digital Signature 

Encryption using RC4-40, RC4-128, AES-128, and AES-256 is fully supported using a separate library. This library also provides SHA1 or SHA-256 Digital Signature using your x509 certificate. The graphic signature is represented by a clickable widget that shows Digital Signature information.

Drop me an email for availability and more information.

Download Pdf creation library source code on GitHub

https://github.com/DavBfr/dart_pdf

Check out the implementation details of Pdf creation library on PUB

https://pub.dev/packages/pdf