khmer_pdf_fixer 0.1.1

Flutter helpers for rendering Khmer text in generated PDFs with bundled Siemreap font support.

Khmer PDF Fixer

khmer_pdf_fixer is a Flutter package for generating PDFs that contain Khmer text. It bundles the Siemreap font, provides helper widgets for the pdf package, and includes both:

• a Unicode reorderer for simple Khmer text flows in the pdf package
• a raster-text fallback for cases where Khmer OpenType shaping is required

Why this package exists

The Dart pdf package does not perform full Khmer shaping. That means complex Khmer clusters, split vowels, and stacked marks can render incorrectly when drawn as plain PDF text.

This package gives you two approaches:

• KhmerText, KhmerParagraph, KhmerHeader, KhmerRichText, KhmerBulletList, and KhmerTable for lightweight helper usage
• KhmerTextRaster for stronger rendering fidelity by shaping Khmer with Flutter first, then embedding the result as an image in the PDF

If your document contains important Khmer body copy, headings, or tables, prefer KhmerTextRaster.

Features

• Bundled Siemreap-Regular.ttf
• KhmerFontManager for loading the bundled font into pdf
• .fix string extension for Khmer visual reordering
• Khmer PDF widgets for common document structures
• Raster Khmer renderer for better visual output in generated PDFs

Installation

dependencies:
  khmer_pdf_fixer: ^0.1.1

Then run:

flutter pub get

Basic usage

Initialize the bundled font before building PDF text styles:

await KhmerFontManager().initialize();

PDF text helper usage

import 'package:khmer_pdf_fixer/khmer_pdf_fixer.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;

final pdf = pw.Document();

await KhmerFontManager().initialize();

pdf.addPage(
  pw.Page(
    build: (context) => pw.Column(
      crossAxisAlignment: pw.CrossAxisAlignment.start,
      children: [
        KhmerHeader('វិក្កយបត្រ'),
        KhmerParagraph('អត្ថបទខ្មែរ'),
        KhmerText(
          'សូមអរគុណ!',
          fontSize: 18,
          color: PdfColors.green700,
        ),
      ],
    ),
  ),
);

Raster fallback usage

Use this when Khmer shaping quality matters more than selectable PDF text:

import 'package:khmer_pdf_fixer/khmer_pdf_fixer.dart';
import 'package:pdf/widgets.dart' as pw;

final widget = await KhmerTextRaster.create(
  'សូមស្វាគមន៍មកកាន់ប្រព័ន្ធរបស់យើង។',
  fontSize: 16,
  maxWidth: 400,
);

pdf.addPage(
  pw.Page(
    build: (context) => widget,
  ),
);

API overview

• KhmerFontManager
• KhmerFontType
• KhmerText
• KhmerHeader
• KhmerParagraph
• KhmerRichText
• KhmerBulletList
• KhmerTable
• KhmerTextRaster
• String.fix

Current limitation

The plain PDF text helpers still rely on heuristics because the underlying pdf package does not support full Khmer shaping. For the most reliable Khmer output, use KhmerTextRaster.

Example app

The example app in example/ generates a sample invoice PDF and demonstrates the raster fallback path for Khmer rendering.

License

Apache-2.0