| // 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:js_util' as js_util; |
| |
| import 'package:test/bootstrap/browser.dart'; |
| import 'package:test/test.dart'; |
| import 'package:ui/src/engine.dart'; |
| import 'package:ui/ui.dart' hide TextStyle; |
| |
| import '../../common/test_initialization.dart'; |
| import '../screenshot.dart'; |
| |
| void main() { |
| internalBootstrapBrowserTest(() => testMain); |
| } |
| |
| Future<void> testMain() async { |
| setUpUnitTests( |
| setUpTestViewDimensions: false, |
| ); |
| |
| test('Blend circles with difference and color', () async { |
| final RecordingCanvas rc = |
| RecordingCanvas(const Rect.fromLTRB(0, 0, 400, 300)); |
| rc.save(); |
| rc.drawRect( |
| const Rect.fromLTRB(0, 0, 400, 400), |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..color = const Color.fromARGB(255, 255, 255, 255)); |
| rc.drawCircle( |
| const Offset(100, 100), |
| 80.0, |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..color = const Color.fromARGB(128, 255, 0, 0) |
| ..blendMode = BlendMode.difference); |
| |
| rc.drawCircle( |
| const Offset(170, 100), |
| 80.0, |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..blendMode = BlendMode.color |
| ..color = const Color.fromARGB(128, 0, 255, 0)); |
| |
| rc.drawCircle( |
| const Offset(135, 170), |
| 80.0, |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..color = const Color.fromARGB(128, 255, 0, 0)); |
| rc.restore(); |
| |
| await canvasScreenshot(rc, 'canvas_blend_circle_diff_color'); |
| }); |
| |
| test('Blend circle and text with multiply', () async { |
| final RecordingCanvas rc = |
| RecordingCanvas(const Rect.fromLTRB(0, 0, 400, 300)); |
| rc.save(); |
| rc.drawRect( |
| const Rect.fromLTRB(0, 0, 400, 400), |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..color = const Color.fromARGB(255, 255, 255, 255)); |
| rc.drawCircle( |
| const Offset(100, 100), |
| 80.0, |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..color = const Color.fromARGB(128, 255, 0, 0) |
| ..blendMode = BlendMode.difference); |
| rc.drawCircle( |
| const Offset(170, 100), |
| 80.0, |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..blendMode = BlendMode.color |
| ..color = const Color.fromARGB(128, 0, 255, 0)); |
| |
| rc.drawCircle( |
| const Offset(135, 170), |
| 80.0, |
| SurfacePaint() |
| ..style = PaintingStyle.fill |
| ..color = const Color.fromARGB(128, 255, 0, 0)); |
| rc.drawImage(createTestImage(), const Offset(135.0, 130.0), |
| SurfacePaint()..blendMode = BlendMode.multiply); |
| rc.restore(); |
| await canvasScreenshot(rc, 'canvas_blend_image_multiply'); |
| }); |
| } |
| |
| HtmlImage createTestImage() { |
| const int width = 100; |
| const int height = 50; |
| final DomCanvasElement canvas = |
| createDomCanvasElement(width: width, height: height); |
| final DomCanvasRenderingContext2D ctx = canvas.context2D; |
| ctx.fillStyle = '#E04040'; |
| ctx.fillRect(0, 0, 33, 50); |
| ctx.fill(); |
| ctx.fillStyle = '#40E080'; |
| ctx.fillRect(33, 0, 33, 50); |
| ctx.fill(); |
| ctx.fillStyle = '#2040E0'; |
| ctx.fillRect(66, 0, 33, 50); |
| ctx.fill(); |
| final DomHTMLImageElement imageElement = createDomHTMLImageElement(); |
| imageElement.src = js_util.callMethod<String>(canvas, 'toDataURL', <dynamic>[]); |
| return HtmlImage(imageElement, width, height); |
| } |