// Copyright 2014 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:math' as math; import 'dart:typed_data'; import 'package:flutter/widgets.dart'; import 'recorder.dart'; const List<int> kTransparentImage = <int>[ 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, 0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x08, 0x06, 0x00, 0x00, 0x00, 0x1F, 0x15, 0xC4, 0x89, 0x00, 0x00, 0x00, 0x0A, 0x49, 0x44, 0x41, 0x54, 0x78, 0x9C, 0x63, 0x00, 0x01, 0x00, 0x00, 0x05, 0x00, 0x01, 0x0D, 0x0A, 0x2D, 0xB4, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4E, 0x44, 0xAE, ]; /// An animated GIF image with 3 1x1 pixel frames (a red, green, and blue /// frames). The GIF animates forever, and each frame has a 100ms delay. const List<int> kAnimatedGif = <int> [ 0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x01, 0x00, 0x01, 0x00, 0xa1, 0x03, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0xff, 0xff, 0x21, 0xff, 0x0b, 0x4e, 0x45, 0x54, 0x53, 0x43, 0x41, 0x50, 0x45, 0x32, 0x2e, 0x30, 0x03, 0x01, 0x00, 0x00, 0x00, 0x21, 0xf9, 0x04, 0x00, 0x0a, 0x00, 0xff, 0x00, 0x2c, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x02, 0x02, 0x4c, 0x01, 0x00, 0x21, 0xf9, 0x04, 0x00, 0x0a, 0x00, 0xff, 0x00, 0x2c, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x02, 0x02, 0x54, 0x01, 0x00, 0x21, 0xf9, 0x04, 0x00, 0x0a, 0x00, 0xff, 0x00, 0x2c, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x02, 0x02, 0x44, 0x01, 0x00, 0x3b, ]; /// Measures expense of constructing Image widgets. class BenchBuildImage extends WidgetRecorder { BenchBuildImage() : super(name: benchmarkName); static const String benchmarkName = 'draw_image'; @override Widget createWidget() { return Directionality( textDirection: TextDirection.ltr, child: _RotatingWidget( child: Row(children: <Widget>[ Image.memory(Uint8List.fromList(kTransparentImage)), Image.memory(Uint8List.fromList(kAnimatedGif)), ]), ), ); } } class _RotatingWidget extends StatefulWidget { const _RotatingWidget({this.child, Key key}) : super(key: key); final Widget child; @override _RotatingWidgetState createState() => _RotatingWidgetState(); } class _RotatingWidgetState extends State<_RotatingWidget> with SingleTickerProviderStateMixin { AnimationController controller; @override void initState() { super.initState(); controller = AnimationController( duration: const Duration(milliseconds: 200), vsync: this, )..repeat(); } @override Widget build(BuildContext context) { return AnimatedBuilder( animation: controller, builder: (BuildContext context, Widget child) { return Transform( transform: Matrix4.identity()..rotateZ(2 * math.pi * controller.value), child: widget.child, ); }, ); } }