| // 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'; |
| import 'dart:ui' as ui; |
| |
| import 'package:flutter/material.dart'; |
| |
| import 'recorder.dart'; |
| |
| const String chars = '1234567890' |
| 'abcdefghijklmnopqrstuvwxyz' |
| 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' |
| '!@#%^&()[]{}<>,./?;:"`~-_=+|'; |
| |
| String _randomize(String text) { |
| return text.replaceAllMapped( |
| '*', |
| // Passing a seed so the results are reproducible. |
| (_) => chars[Random(0).nextInt(chars.length)], |
| ); |
| } |
| |
| class ParagraphGenerator { |
| int _counter = 0; |
| |
| /// Randomizes the given [text] and creates a paragraph with a unique |
| /// font-size so that the engine doesn't reuse a cached ruler. |
| ui.Paragraph generate( |
| String text, { |
| int? maxLines, |
| bool hasEllipsis = false, |
| }) { |
| final ui.ParagraphBuilder builder = ui.ParagraphBuilder(ui.ParagraphStyle( |
| fontFamily: 'sans-serif', |
| maxLines: maxLines, |
| ellipsis: hasEllipsis ? '...' : null, |
| )) |
| // Start from a font-size of 8.0 and go up by 0.01 each time. |
| ..pushStyle(ui.TextStyle(fontSize: 8.0 + _counter * 0.01)) |
| ..addText(_randomize(text)); |
| _counter++; |
| return builder.build(); |
| } |
| } |
| |
| /// Which mode to run [BenchBuildColorsGrid] in. |
| enum _TestMode { |
| /// Uses the HTML rendering backend with the canvas 2D text layout. |
| useCanvasTextLayout, |
| |
| /// Uses CanvasKit for everything. |
| useCanvasKit, |
| } |
| |
| /// Repeatedly lays out a paragraph. |
| /// |
| /// Creates a different paragraph each time in order to avoid hitting the cache. |
| class BenchTextLayout extends RawRecorder { |
| BenchTextLayout.canvas() |
| : super(name: canvasBenchmarkName); |
| |
| BenchTextLayout.canvasKit() |
| : super(name: canvasKitBenchmarkName); |
| |
| static const String canvasBenchmarkName = 'text_canvas_layout'; |
| static const String canvasKitBenchmarkName = 'text_canvaskit_layout'; |
| |
| final ParagraphGenerator generator = ParagraphGenerator(); |
| |
| static const String singleLineText = '*** ** ****'; |
| static const String multiLineText = '*** ****** **** *** ******** * *** ' |
| '******* **** ********** *** ******* ' |
| '**** ***** *** ******** *** ********* ' |
| '** * *** ******* ***********'; |
| |
| @override |
| void body(Profile profile) { |
| recordParagraphOperations( |
| profile: profile, |
| paragraph: generator.generate(singleLineText), |
| text: singleLineText, |
| keyPrefix: 'single_line', |
| maxWidth: 800.0, |
| ); |
| |
| recordParagraphOperations( |
| profile: profile, |
| paragraph: generator.generate(multiLineText), |
| text: multiLineText, |
| keyPrefix: 'multi_line', |
| maxWidth: 200.0, |
| ); |
| |
| recordParagraphOperations( |
| profile: profile, |
| paragraph: generator.generate(multiLineText, maxLines: 2), |
| text: multiLineText, |
| keyPrefix: 'max_lines', |
| maxWidth: 200.0, |
| ); |
| |
| recordParagraphOperations( |
| profile: profile, |
| paragraph: generator.generate(multiLineText, hasEllipsis: true), |
| text: multiLineText, |
| keyPrefix: 'ellipsis', |
| maxWidth: 200.0, |
| ); |
| } |
| |
| void recordParagraphOperations({ |
| required Profile profile, |
| required ui.Paragraph paragraph, |
| required String text, |
| required String keyPrefix, |
| required double maxWidth, |
| }) { |
| profile.record('$keyPrefix.layout', () { |
| paragraph.layout(ui.ParagraphConstraints(width: maxWidth)); |
| }, reported: true); |
| profile.record('$keyPrefix.getBoxesForRange', () { |
| for (int start = 0; start < text.length; start += 3) { |
| for (int end = start + 1; end < text.length; end *= 2) { |
| paragraph.getBoxesForRange(start, end); |
| } |
| } |
| }, reported: true); |
| profile.record('$keyPrefix.getPositionForOffset', () { |
| for (double dx = 0.0; dx < paragraph.width; dx += 10.0) { |
| for (double dy = 0.0; dy < paragraph.height; dy += 10.0) { |
| paragraph.getPositionForOffset(Offset(dx, dy)); |
| } |
| } |
| }, reported: true); |
| } |
| } |
| |
| /// Repeatedly lays out the same paragraph. |
| /// |
| /// Uses the same paragraph content to make sure we hit the cache. It doesn't |
| /// use the same paragraph instance because the layout method will shortcircuit |
| /// in that case. |
| class BenchTextCachedLayout extends RawRecorder { |
| BenchTextCachedLayout.canvas() |
| : super(name: canvasBenchmarkName); |
| |
| BenchTextCachedLayout.canvasKit() |
| : super(name: canvasKitBenchmarkName); |
| |
| static const String canvasBenchmarkName = 'text_canvas_cached_layout'; |
| static const String canvasKitBenchmarkName = 'text_canvas_kit_cached_layout'; |
| |
| @override |
| void body(Profile profile) { |
| final ui.ParagraphBuilder builder = ui.ParagraphBuilder(ui.ParagraphStyle(fontFamily: 'sans-serif')) |
| ..pushStyle(ui.TextStyle(fontSize: 12.0)) |
| ..addText( |
| 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, ' |
| 'sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.', |
| ); |
| final ui.Paragraph paragraph = builder.build(); |
| profile.record('layout', () { |
| paragraph.layout(const ui.ParagraphConstraints(width: double.infinity)); |
| }, reported: true); |
| } |
| } |
| |
| /// Global counter incremented every time the benchmark is asked to |
| /// [createWidget]. |
| /// |
| /// The purpose of this counter is to make sure the rendered paragraphs on each |
| /// build are unique. |
| int _counter = 0; |
| |
| /// Measures how expensive it is to construct a realistic text-heavy piece of UI. |
| /// |
| /// The benchmark constructs a tabbed view, where each tab displays a list of |
| /// colors. Each color's description is made of several [Text] nodes. |
| class BenchBuildColorsGrid extends WidgetBuildRecorder { |
| BenchBuildColorsGrid.canvas() |
| : _mode = _TestMode.useCanvasTextLayout, super(name: canvasBenchmarkName); |
| |
| BenchBuildColorsGrid.canvasKit() |
| : _mode = _TestMode.useCanvasKit, super(name: canvasKitBenchmarkName); |
| |
| /// Disables tracing for this benchmark. |
| /// |
| /// When tracing is enabled, DOM layout takes longer to complete. This has a |
| /// significant effect on the benchmark since we do a lot of text layout |
| /// operations that trigger synchronous DOM layout. |
| @override |
| bool get isTracingEnabled => false; |
| |
| static const String canvasBenchmarkName = 'text_canvas_color_grid'; |
| static const String canvasKitBenchmarkName = 'text_canvas_kit_color_grid'; |
| |
| /// Whether to use the new canvas-based text measurement implementation. |
| final _TestMode _mode; |
| |
| num _textLayoutMicros = 0; |
| |
| @override |
| Future<void> setUpAll() async { |
| super.setUpAll(); |
| registerEngineBenchmarkValueListener('text_layout', (num value) { |
| _textLayoutMicros += value; |
| }); |
| } |
| |
| @override |
| Future<void> tearDownAll() async { |
| stopListeningToEngineBenchmarkValues('text_layout'); |
| } |
| |
| @override |
| void frameWillDraw() { |
| super.frameWillDraw(); |
| _textLayoutMicros = 0; |
| } |
| |
| @override |
| void frameDidDraw() { |
| // We need to do this before calling [super.frameDidDraw] because the latter |
| // updates the value of [showWidget] in preparation for the next frame. |
| // TODO(yjbanov): https://github.com/flutter/flutter/issues/53877 |
| if (showWidget && _mode != _TestMode.useCanvasKit) { |
| profile!.addDataPoint( |
| 'text_layout', |
| Duration(microseconds: _textLayoutMicros.toInt()), |
| reported: true, |
| ); |
| } |
| super.frameDidDraw(); |
| } |
| |
| @override |
| Widget createWidget() { |
| _counter++; |
| return const MaterialApp(home: ColorsDemo()); |
| } |
| } |
| |
| // The code below was copied from `colors_demo.dart` in the `flutter_gallery` |
| // example. |
| |
| const double kColorItemHeight = 48.0; |
| |
| class Palette { |
| Palette({required this.name, required this.primary, this.accent, this.threshold = 900}); |
| |
| final String name; |
| final MaterialColor primary; |
| final MaterialAccentColor? accent; |
| final int |
| threshold; // titles for indices > threshold are white, otherwise black |
| } |
| |
| final List<Palette> allPalettes = <Palette>[ |
| Palette( |
| name: 'RED', |
| primary: Colors.red, |
| accent: Colors.redAccent, |
| threshold: 300), |
| Palette( |
| name: 'PINK', |
| primary: Colors.pink, |
| accent: Colors.pinkAccent, |
| threshold: 200), |
| Palette( |
| name: 'PURPLE', |
| primary: Colors.purple, |
| accent: Colors.purpleAccent, |
| threshold: 200), |
| Palette( |
| name: 'DEEP PURPLE', |
| primary: Colors.deepPurple, |
| accent: Colors.deepPurpleAccent, |
| threshold: 200), |
| Palette( |
| name: 'INDIGO', |
| primary: Colors.indigo, |
| accent: Colors.indigoAccent, |
| threshold: 200), |
| Palette( |
| name: 'BLUE', |
| primary: Colors.blue, |
| accent: Colors.blueAccent, |
| threshold: 400), |
| Palette( |
| name: 'LIGHT BLUE', |
| primary: Colors.lightBlue, |
| accent: Colors.lightBlueAccent, |
| threshold: 500), |
| Palette( |
| name: 'CYAN', |
| primary: Colors.cyan, |
| accent: Colors.cyanAccent, |
| threshold: 600), |
| Palette( |
| name: 'TEAL', |
| primary: Colors.teal, |
| accent: Colors.tealAccent, |
| threshold: 400), |
| Palette( |
| name: 'GREEN', |
| primary: Colors.green, |
| accent: Colors.greenAccent, |
| threshold: 500), |
| Palette( |
| name: 'LIGHT GREEN', |
| primary: Colors.lightGreen, |
| accent: Colors.lightGreenAccent, |
| threshold: 600), |
| Palette( |
| name: 'LIME', |
| primary: Colors.lime, |
| accent: Colors.limeAccent, |
| threshold: 800), |
| Palette(name: 'YELLOW', primary: Colors.yellow, accent: Colors.yellowAccent), |
| Palette(name: 'AMBER', primary: Colors.amber, accent: Colors.amberAccent), |
| Palette( |
| name: 'ORANGE', |
| primary: Colors.orange, |
| accent: Colors.orangeAccent, |
| threshold: 700), |
| Palette( |
| name: 'DEEP ORANGE', |
| primary: Colors.deepOrange, |
| accent: Colors.deepOrangeAccent, |
| threshold: 400), |
| Palette(name: 'BROWN', primary: Colors.brown, threshold: 200), |
| Palette(name: 'GREY', primary: Colors.grey, threshold: 500), |
| Palette(name: 'BLUE GREY', primary: Colors.blueGrey, threshold: 500), |
| ]; |
| |
| class ColorItem extends StatelessWidget { |
| const ColorItem({ |
| super.key, |
| required this.index, |
| required this.color, |
| this.prefix = '', |
| }); |
| |
| final int index; |
| final Color color; |
| final String prefix; |
| |
| String colorString() => |
| "$_counter:#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}"; |
| |
| @override |
| Widget build(BuildContext context) { |
| return Semantics( |
| container: true, |
| child: Container( |
| height: kColorItemHeight, |
| padding: const EdgeInsets.symmetric(horizontal: 16.0), |
| color: color, |
| child: SafeArea( |
| top: false, |
| bottom: false, |
| child: Row( |
| mainAxisAlignment: MainAxisAlignment.spaceBetween, |
| children: <Widget>[ |
| Text('$_counter:$prefix$index'), |
| Text(colorString()), |
| ], |
| ), |
| ), |
| ), |
| ); |
| } |
| } |
| |
| class PaletteTabView extends StatelessWidget { |
| const PaletteTabView({ |
| super.key, |
| required this.colors, |
| }); |
| |
| final Palette colors; |
| |
| static const List<int> primaryKeys = <int>[ |
| 50, |
| 100, |
| 200, |
| 300, |
| 400, |
| 500, |
| 600, |
| 700, |
| 800, |
| 900, |
| ]; |
| static const List<int> accentKeys = <int>[100, 200, 400, 700]; |
| |
| @override |
| Widget build(BuildContext context) { |
| final TextTheme textTheme = Theme.of(context).textTheme; |
| final TextStyle whiteTextStyle = |
| textTheme.bodyMedium!.copyWith(color: Colors.white); |
| final TextStyle blackTextStyle = |
| textTheme.bodyMedium!.copyWith(color: Colors.black); |
| return Scrollbar( |
| child: ListView( |
| itemExtent: kColorItemHeight, |
| children: <Widget>[ |
| ...primaryKeys.map<Widget>((int index) { |
| return DefaultTextStyle( |
| style: index > colors.threshold ? whiteTextStyle : blackTextStyle, |
| child: ColorItem(index: index, color: colors.primary[index]!), |
| ); |
| }), |
| if (colors.accent != null) |
| ...accentKeys.map<Widget>((int index) { |
| return DefaultTextStyle( |
| style: |
| index > colors.threshold ? whiteTextStyle : blackTextStyle, |
| child: ColorItem( |
| index: index, color: colors.accent![index]!, prefix: 'A'), |
| ); |
| }), |
| ], |
| ), |
| ); |
| } |
| } |
| |
| class ColorsDemo extends StatelessWidget { |
| const ColorsDemo({super.key}); |
| |
| @override |
| Widget build(BuildContext context) { |
| return DefaultTabController( |
| length: allPalettes.length, |
| child: Scaffold( |
| appBar: AppBar( |
| elevation: 0.0, |
| title: const Text('Colors'), |
| bottom: TabBar( |
| isScrollable: true, |
| tabs: allPalettes |
| .map<Widget>( |
| (Palette swatch) => Tab(text: '$_counter:${swatch.name}')) |
| .toList(), |
| ), |
| ), |
| body: TabBarView( |
| children: allPalettes.map<Widget>((Palette colors) { |
| return PaletteTabView(colors: colors); |
| }).toList(), |
| ), |
| ), |
| ); |
| } |
| } |
