lib/web_ui/test/canvaskit/no_create_image_bitmap_test.dart

// 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 'package:test/bootstrap/browser.dart';
import 'package:test/test.dart';
import 'package:ui/src/engine.dart';
import 'package:ui/ui.dart' as ui;

import 'common.dart';

void main() {
  internalBootstrapBrowserTest(() => testMain);
}

const ui.Rect region = ui.Rect.fromLTRB(0, 0, 500, 250);

/// Test that we can render even if `createImageBitmap` is not supported.
void testMain() {
  group('CanvasKit', () {
    setUpCanvasKitTest();
    setUp(() async {
      EngineFlutterDisplay.instance.debugOverrideDevicePixelRatio(1.0);
      debugDisableCreateImageBitmapSupport = true;
    });

    tearDown(() {
      debugDisableCreateImageBitmapSupport = false;
    });

    test('can render without createImageBitmap', () async {
      final CkPictureRecorder recorder = CkPictureRecorder();
      final CkCanvas canvas = recorder.beginRecording(region);

      final CkGradientLinear gradient = CkGradientLinear(
          ui.Offset(region.left + region.width / 4, region.height / 2),
          ui.Offset(region.right - region.width / 8, region.height / 2),
          const <ui.Color>[
            ui.Color(0xFF4285F4),
            ui.Color(0xFF34A853),
            ui.Color(0xFFFBBC05),
            ui.Color(0xFFEA4335),
            ui.Color(0xFF4285F4),
          ],
          const <double>[
            0.0,
            0.25,
            0.5,
            0.75,
            1.0,
          ],
          ui.TileMode.clamp,
          null);

      final CkPaint paint = CkPaint()..shader = gradient;

      canvas.drawRect(region, paint);

      await matchPictureGolden(
        'canvaskit_linear_gradient_no_create_image_bitmap.png',
        recorder.endRecording(),
        region: region,
      );
    });
  });
}