| // 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. |
| |
| // @dart = 2.6 |
| import 'dart:io'; |
| import 'dart:typed_data'; |
| import 'dart:ui' as ui; |
| |
| import 'package:test/test.dart'; |
| import 'package:path/path.dart' as path; |
| |
| void main() { |
| |
| test('Animation metadata', () async { |
| Uint8List data = await _getSkiaResource('alphabetAnim.gif').readAsBytes(); |
| ui.Codec codec = await ui.instantiateImageCodec(data); |
| expect(codec, isNotNull); |
| expect(codec.frameCount, 13); |
| expect(codec.repetitionCount, 0); |
| codec.dispose(); |
| |
| data = await _getSkiaResource('test640x479.gif').readAsBytes(); |
| codec = await ui.instantiateImageCodec(data); |
| expect(codec.frameCount, 4); |
| expect(codec.repetitionCount, -1); |
| }); |
| |
| test('Fails with invalid data', () async { |
| final Uint8List data = Uint8List.fromList(<int>[1, 2, 3]); |
| expect( |
| () => ui.instantiateImageCodec(data), |
| throwsA(exceptionWithMessage('Invalid image data')) |
| ); |
| }); |
| |
| test('nextFrame', () async { |
| final Uint8List data = await _getSkiaResource('test640x479.gif').readAsBytes(); |
| final ui.Codec codec = await ui.instantiateImageCodec(data); |
| final List<List<int>> decodedFrameInfos = <List<int>>[]; |
| for (int i = 0; i < 5; i++) { |
| final ui.FrameInfo frameInfo = await codec.getNextFrame(); |
| decodedFrameInfos.add(<int>[ |
| frameInfo.duration.inMilliseconds, |
| frameInfo.image.width, |
| frameInfo.image.height, |
| ]); |
| } |
| expect(decodedFrameInfos, equals(<List<int>>[ |
| <int>[200, 640, 479], |
| <int>[200, 640, 479], |
| <int>[200, 640, 479], |
| <int>[200, 640, 479], |
| <int>[200, 640, 479], |
| ])); |
| }); |
| |
| test('non animated image', () async { |
| final Uint8List data = await _getSkiaResource('baby_tux.png').readAsBytes(); |
| final ui.Codec codec = await ui.instantiateImageCodec(data); |
| final List<List<int>> decodedFrameInfos = <List<int>>[]; |
| for (int i = 0; i < 2; i++) { |
| final ui.FrameInfo frameInfo = await codec.getNextFrame(); |
| decodedFrameInfos.add(<int>[ |
| frameInfo.duration.inMilliseconds, |
| frameInfo.image.width, |
| frameInfo.image.height, |
| ]); |
| } |
| expect(decodedFrameInfos, equals(<List<int>>[ |
| <int>[0, 240, 246], |
| <int>[0, 240, 246], |
| ])); |
| }); |
| } |
| |
| /// Returns a File handle to a file in the skia/resources directory. |
| File _getSkiaResource(String fileName) { |
| // As Platform.script is not working for flutter_tester |
| // (https://github.com/flutter/flutter/issues/12847), this is currently |
| // assuming the curent working directory is engine/src. |
| // This is fragile and should be changed once the Platform.script issue is |
| // resolved. |
| final String assetPath = |
| path.join('third_party', 'skia', 'resources', 'images', fileName); |
| return File(assetPath); |
| } |
| |
| Matcher exceptionWithMessage(String m) { |
| return predicate<Exception>((Exception e) { |
| return e is Exception && e.toString().contains(m); |
| }); |
| } |