向Dart命令行应用程序添加字体

import 'dart:ui' as ui;

void main() {
  loadFonts().then((_) {
    // 在这里运行您的应用程序代码
  });
}

Future<void> loadFonts() async {
  final fontData = await rootBundle.load('fonts/your_font.ttf');
  final fontLoader = ui.FontLoader('YourFont');
  fontLoader.addFont(fontData);
  await fontLoader.load();
}

import 'dart:ui' as ui;

void main() {
  loadFonts().then((_) {
    printWithCustomFont('Hello, World!', 'YourFont', 24);
  });
}

void printWithCustomFont(String text, String fontName, double fontSize) {
  final textStyle = ui.TextStyle(
    fontFamily: fontName,
    fontSize: fontSize,
  );
  final paragraphStyle = ui.ParagraphStyle(textStyle: textStyle);
  final paragraphBuilder = ui.ParagraphBuilder(paragraphStyle)
    ..addText(text);
  final paragraph = paragraphBuilder.build();
  paragraph.layout(ui.ParagraphConstraints(width: 300));
  final canvas = ui.Canvas();
  paragraph.paint(canvas, const ui.Offset(0, 0));
  final output = canvas
      .toImage(300, paragraph.height.toInt())
      .toByteData(format: ui.ImageByteFormat.png);
  print(output);
}