vector_graphics 1.1.14 vector_graphics: ^1.1.14 copied to clipboard
A vector graphics rendering package for Flutter using a binary encoding.
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:developer';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:vector_graphics/vector_graphics.dart';
import 'package:vector_graphics_compiler/vector_graphics_compiler.dart';
void main() {
runApp(const MyApp());
}
/// The main example app widget.
class MyApp extends StatelessWidget {
/// Creates a new [MyApp].
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Vector Graphics Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const Scaffold(
body: Center(
child: VectorGraphic(
loader: NetworkSvgLoader(
'https://upload.wikimedia.org/wikipedia/commons/f/fd/Ghostscript_Tiger.svg',
),
),
),
),
);
}
}
/// A [BytesLoader] that converts a network URL into encoded SVG data.
class NetworkSvgLoader extends BytesLoader {
/// Creates a [NetworkSvgLoader] that loads an SVG from [url].
const NetworkSvgLoader(this.url);
/// The SVG URL.
final String url;
@override
Future<ByteData> loadBytes(BuildContext? context) async {
return compute((String svgUrl) async {
final http.Response request = await http.get(Uri.parse(svgUrl));
final TimelineTask task = TimelineTask()..start('encodeSvg');
final Uint8List compiledBytes = encodeSvg(
xml: request.body,
debugName: svgUrl,
enableClippingOptimizer: false,
enableMaskingOptimizer: false,
enableOverdrawOptimizer: false,
);
task.finish();
// sendAndExit will make sure this isn't copied.
return compiledBytes.buffer.asByteData();
}, url, debugLabel: 'Load Bytes');
}
@override
int get hashCode => url.hashCode;
@override
bool operator ==(Object other) {
return other is NetworkSvgLoader && other.url == url;
}
}