upstream-flutter-samples/asset_transformation/lib/main.dart

import 'package:flutter/material.dart';
import 'package:vector_graphics/vector_graphics.dart';

void main() {
  runApp(const MainApp());
}

class MainApp extends StatelessWidget {
  const MainApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Container(
          padding: const EdgeInsets.all(50),
          child: Column(
            children: [
              const Text(
                'This is an image asset that was declared in pubspec.yaml. '
                'If you open the file, you will notice that the image is '
                'colorful, but in the app it appears in grayscale. This is '
                'because the transformer it was declared with produced the '
                'image in grayscale. Explore the grayscale_transformer directory '
                'to see the source and learn how to write your own Dart package '
                'that can be used as an asset transformer in Flutter.',
              ),
              Image.asset('assets/colorful.jpg'),
              const Divider(height: 75),
              const Text(
                "This is an SVG image rendered using the vector_graphics "
                "package. Normally, the package can only render images produced "
                "by the vector_graphics_compiler package. However, since we "
                "configured the SVG asset with vector_graphics_compiler as a "
                "transformer, we can render it directly using the "
                "vector_graphics API.",
              ),
              const VectorGraphic(loader: AssetBytesLoader('assets/svg.svg')),
            ],
          ),
        ),
      ),
    );
  }
}