Revert "Remove package:image dependency (#115674)" (#115680)

This reverts commit cf2c9f6e.

dev/integration_tests/ui/pubspec.yaml

@@ -8,6 +8,7 @@ environment:
 # It can probably be removed, see the comment in that file.
 
 dependencies:
+  image: 3.2.2
   flutter:
     sdk: flutter
   flutter_driver:
@@ -42,6 +43,7 @@ dependencies:
   node_preamble: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   package_config: 2.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   path: 1.8.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  petitparser: 5.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   pool: 1.5.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   pub_semver: 2.1.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   shelf: 1.4.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -64,6 +66,7 @@ dependencies:
   web_socket_channel: 2.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webdriver: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   webkit_inspection_protocol: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  xml: 6.2.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
 dev_dependencies:
@@ -79,4 +82,4 @@ flutter:
   assets:
     - assets/foo.png
 
-# PUBSPEC CHECKSUM: 691e
+# PUBSPEC CHECKSUM: 321a

dev/integration_tests/ui/test_driver/screenshot_test.dart

+// 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.
+
+// This test is used by devicelab, test "integration_ui_ios_screenshot".
+// Its use of package:image is, at the time of writing, the only use of that
+// package in this repository. If package:image is a problem, it is probably
+// fine to just remove this test since the value of the test is probably not
+// as much as the cost of the dependency.
+
+import 'package:flutter_driver/flutter_driver.dart';
+import 'package:image/image.dart';
+
+import 'package:test/test.dart' hide TypeMatcher, isInstanceOf;
+
+void main() {
+  group('FlutterDriver', () {
+    late FlutterDriver driver;
+
+    setUpAll(() async {
+      driver = await FlutterDriver.connect();
+    });
+
+    tearDownAll(() async {
+      await driver.close();
+    });
+
+    test('should take screenshot', () async {
+      final SerializableFinder toggleBtn = find.byValueKey('toggle');
+      // Cards use a magic background color that we look for in the screenshots.
+      final Matcher cardsAreVisible = contains(getColor(0xff, 0x01, 0x02));
+      await driver.waitFor(toggleBtn);
+
+      bool cardsShouldBeVisible = false;
+      Image? imageBefore = decodePng(await driver.screenshot());
+      for (int i = 0; i < 10; i += 1) {
+        await driver.tap(toggleBtn);
+        cardsShouldBeVisible = !cardsShouldBeVisible;
+        final Image? imageAfter = decodePng(await driver.screenshot());
+
+        if (cardsShouldBeVisible) {
+          expect(imageBefore?.data, isNot(cardsAreVisible));
+          expect(imageAfter?.data, cardsAreVisible);
+        } else {
+          expect(imageBefore?.data, cardsAreVisible);
+          expect(imageAfter?.data, isNot(cardsAreVisible));
+        }
+
+        imageBefore = imageAfter;
+      }
+    }, timeout: Timeout.none);
+  });
+}