| // 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:async'; |
| import 'dart:developer' as developer; |
| import 'dart:ui'; |
| |
| import 'package:litetest/litetest.dart'; |
| import 'package:vm_service/vm_service.dart' as vms; |
| import 'package:vm_service/vm_service_io.dart'; |
| |
| void main() { |
| test('Canvas.saveLayer emits tracing', () async { |
| final developer.ServiceProtocolInfo info = await developer.Service.getInfo(); |
| |
| if (info.serverUri == null) { |
| fail('This test must not be run with --disable-observatory.'); |
| } |
| |
| final vms.VmService vmService = await vmServiceConnectUri( |
| 'ws://localhost:${info.serverUri!.port}${info.serverUri!.path}ws', |
| ); |
| |
| final Completer<void> completer = Completer<void>(); |
| window.onBeginFrame = (Duration timeStamp) async { |
| final PictureRecorder recorder = PictureRecorder(); |
| final Canvas canvas = Canvas(recorder); |
| canvas.drawColor(const Color(0xff0000ff), BlendMode.srcOut); |
| canvas.drawPaint(Paint()..imageFilter = ImageFilter.blur(sigmaX: 2, sigmaY: 3)); |
| canvas.saveLayer(null, Paint()); |
| canvas.drawRect(const Rect.fromLTRB(10, 10, 20, 20), Paint()); |
| canvas.saveLayer(const Rect.fromLTWH(0, 0, 100, 100), Paint()); |
| canvas.drawRect(const Rect.fromLTRB(10, 10, 20, 20), Paint()); |
| canvas.drawRect(const Rect.fromLTRB(15, 15, 25, 25), Paint()); |
| canvas.restore(); |
| canvas.restore(); |
| final Picture picture = recorder.endRecording(); |
| |
| final SceneBuilder builder = SceneBuilder(); |
| builder.addPicture(Offset.zero, picture); |
| final Scene scene = builder.build(); |
| |
| await scene.toImage(100, 100); |
| scene.dispose(); |
| completer.complete(); |
| }; |
| window.scheduleFrame(); |
| await completer.future; |
| |
| final vms.Timeline timeline = await vmService.getVMTimeline(); |
| await vmService.dispose(); |
| |
| int saveLayerRecordCount = 0; |
| int saveLayerCount = 0; |
| for (final vms.TimelineEvent event in timeline.traceEvents!) { |
| final Map<String, dynamic> json = event.json!; |
| if (json['ph'] == 'B') { |
| if (json['name'] == 'ui.Canvas::saveLayer (Recorded)') { |
| saveLayerRecordCount += 1; |
| } |
| if (json['name'] == 'Canvas::saveLayer') { |
| saveLayerCount += 1; |
| } |
| } |
| } |
| expect(saveLayerRecordCount, 3); |
| expect(saveLayerCount, 3); |
| }); |
| } |