// 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/services.dart'; import 'package:flutter_test/flutter_test.dart'; import 'package:integration_test/integration_test.dart'; import 'package:wide_gamut_test/main.dart' as app; // See: https://developer.apple.com/documentation/metal/mtlpixelformat/mtlpixelformatbgr10_xr. double _decodeBGR10(int x) { const double max = 1.25098; const double min = -0.752941; const double intercept = min; const double slope = (max - min) / 1024.0; return (x * slope) + intercept; } double _decodeHalf(int x) { if (x == 0x7c00) { return double.infinity; } if (x == 0xfc00) { return -double.infinity; } final double sign = x & 0x8000 == 0 ? 1.0 : -1.0; final int exponent = (x >> 10) & 0x1f; final int fraction = x & 0x3ff; if (exponent == 0) { return sign * math.pow(2.0, -14) * (fraction / 1024.0); } else { return sign * math.pow(2.0, exponent - 15) * (1.0 + fraction / 1024.0); } } bool _isAlmost(double x, double y, double epsilon) { return (x - y).abs() < epsilon; } List<double> _deepRed = <double>[1.0931, -0.2268, -0.1501]; bool _findRGBAF16Color( Uint8List bytes, int width, int height, List<double> color) { final ByteData byteData = ByteData.sublistView(bytes); expect(bytes.lengthInBytes, width * height * 8); expect(bytes.lengthInBytes, byteData.lengthInBytes); bool foundDeepRed = false; for (int i = 0; i < bytes.lengthInBytes; i += 8) { final int pixel = byteData.getUint64(i, Endian.host); final double blue = _decodeHalf((pixel >> 32) & 0xffff); final double green = _decodeHalf((pixel >> 16) & 0xffff); final double red = _decodeHalf((pixel >> 0) & 0xffff); if (_isAlmost(red, color[0], 0.01) && _isAlmost(green, color[1], 0.01) && _isAlmost(blue, color[2], 0.01)) { foundDeepRed = true; } } return foundDeepRed; } bool _findBGRA10Color( Uint8List bytes, int width, int height, List<double> color) { final ByteData byteData = ByteData.sublistView(bytes); expect(bytes.lengthInBytes, width * height * 8); expect(bytes.lengthInBytes, byteData.lengthInBytes); bool foundDeepRed = false; for (int i = 0; i < bytes.lengthInBytes; i += 8) { final int pixel = byteData.getUint64(i, Endian.host); final double blue = _decodeBGR10((pixel >> 6) & 0x3ff); final double green = _decodeBGR10((pixel >> 22) & 0x3ff); final double red = _decodeBGR10((pixel >> 38) & 0x3ff); if (_isAlmost(red, color[0], 0.01) && _isAlmost(green, color[1], 0.01) && _isAlmost(blue, color[2], 0.01)) { foundDeepRed = true; } } return foundDeepRed; } bool _findBGR10Color( Uint8List bytes, int width, int height, List<double> color) { final ByteData byteData = ByteData.sublistView(bytes); expect(bytes.lengthInBytes, width * height * 4); expect(bytes.lengthInBytes, byteData.lengthInBytes); bool foundDeepRed = false; for (int i = 0; i < bytes.lengthInBytes; i += 4) { final int pixel = byteData.getUint32(i, Endian.host); final double blue = _decodeBGR10(pixel & 0x3ff); final double green = _decodeBGR10((pixel >> 10) & 0x3ff); final double red = _decodeBGR10((pixel >> 20) & 0x3ff); if (_isAlmost(red, color[0], 0.01) && _isAlmost(green, color[1], 0.01) && _isAlmost(blue, color[2], 0.01)) { foundDeepRed = true; } } return foundDeepRed; } bool _findColor(List<Object?> result, List<double> color) { expect(result, isNotNull); expect(result.length, 4); final int width = (result[0] as int?)!; final int height = (result[1] as int?)!; final String format = (result[2] as String?)!; if (format == 'MTLPixelFormatBGR10_XR') { return _findBGR10Color((result[3] as Uint8List?)!, width, height, color); } else if (format == 'MTLPixelFormatBGRA10_XR') { return _findBGRA10Color((result[3] as Uint8List?)!, width, height, color); } else if (format == 'MTLPixelFormatRGBA16Float') { return _findRGBAF16Color((result[3] as Uint8List?)!, width, height, color); } else { fail('Unsupported pixel format: $format'); } } void main() { IntegrationTestWidgetsFlutterBinding.ensureInitialized(); group('end-to-end test', () { testWidgets('look for display p3 deepest red', (WidgetTester tester) async { app.run(app.Setup.image); await tester.pumpAndSettle(const Duration(seconds: 2)); const MethodChannel channel = MethodChannel('flutter/screenshot'); final List<Object?> result = await channel.invokeMethod('test') as List<Object?>; expect(_findColor(result, _deepRed), isTrue); }); testWidgets('look for display p3 deepest red', (WidgetTester tester) async { app.run(app.Setup.canvasSaveLayer); await tester.pumpAndSettle(const Duration(seconds: 2)); const MethodChannel channel = MethodChannel('flutter/screenshot'); final List<Object?> result = await channel.invokeMethod('test') as List<Object?>; expect(_findColor(result, _deepRed), isTrue); }); testWidgets('no p3 deepest red without image', (WidgetTester tester) async { app.run(app.Setup.none); await tester.pumpAndSettle(const Duration(seconds: 2)); const MethodChannel channel = MethodChannel('flutter/screenshot'); final List<Object?> result = await channel.invokeMethod('test') as List<Object?>; expect(_findColor(result, _deepRed), isFalse); expect(_findColor(result, <double>[0.0, 1.0, 0.0]), isFalse); }); testWidgets('p3 deepest red with blur', (WidgetTester tester) async { app.run(app.Setup.blur); await tester.pumpAndSettle(const Duration(seconds: 2)); const MethodChannel channel = MethodChannel('flutter/screenshot'); final List<Object?> result = await channel.invokeMethod('test') as List<Object?>; expect(_findColor(result, _deepRed), isTrue); expect(_findColor(result, <double>[0.0, 1.0, 0.0]), isTrue); }); testWidgets('draw image with wide gamut works', (WidgetTester tester) async { app.run(app.Setup.drawnImage); await tester.pumpAndSettle(const Duration(seconds: 2)); const MethodChannel channel = MethodChannel('flutter/screenshot'); final List<Object?> result = await channel.invokeMethod('test') as List<Object?>; expect(_findColor(result, <double>[0.0, 1.0, 0.0]), isTrue); }); }); }