[Testing] - Added tests for Graphics IImage Breaking Issues 30350 & 30425

src/Controls/tests/TestCases.HostApp/Issues/Issue30350.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<controls:TestContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+                          xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+                          xmlns:controls="clr-namespace:Maui.Controls.Sample.Issues"
+                          x:Class="Maui.Controls.Sample.Issues.Issue30350"
+                          x:DataType="controls:Issue30350">
+    <ScrollView>
+        <VerticalStackLayout Padding="20"
+                             Spacing="15">
+            <Label
+                AutomationId="WaitForStubControl"
+                Text="Issue 30350 - IImage downsize broken - images flipped/rotated since 9.0.80"
+                FontSize="16"
+                HorizontalOptions="Center"/>
+
+            <!-- Original Image Info -->
+            <Label>
+                <Label.FormattedText>
+                    <FormattedString>
+                        <Span Text="Original image: "/>
+                        <Span Text="{Binding OriginalSize}"
+                              FontAttributes="Bold"
+                              TextColor="Blue"/>
+                    </FormattedString>
+                </Label.FormattedText>
+            </Label>
+
+            <!-- Original Image Display -->
+            <Image Source="{Binding OriginalSource}"
+                   AutomationId="OriginalImage"
+                   HeightRequest="200"
+                   Aspect="AspectFit"/>
+
+            <!-- Downsized Image Info -->
+            <Label>
+                <Label.FormattedText>
+                    <FormattedString>
+                        <Span Text="Downsized image: "/>
+                        <Span Text="{Binding DownsizedImageSize}"
+                              FontAttributes="Bold"
+                              TextColor="Blue"/>
+                    </FormattedString>
+                </Label.FormattedText>
+            </Label>
+
+            <!-- Downsized Image Display -->
+            <Image Source="{Binding DownsizedSource}"
+                   AutomationId="DownsizedImage"
+                   HeightRequest="200"
+                   Aspect="AspectFit"/>
+
+            <!-- Status -->
+            <Label x:Name="StatusLabel"
+                   AutomationId="StatusLabel"
+                   Text="Loading images..."
+                   FontSize="14"
+                   HorizontalOptions="Center"
+                   TextColor="Green"/>
+
+        </VerticalStackLayout>
+    </ScrollView>
+</controls:TestContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue30350.xaml.cs

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+using System;
+using System.ComponentModel;
+using System.IO;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks;
+using Microsoft.Maui.Graphics;
+using Microsoft.Maui.Graphics.Platform;
+using IImage = Microsoft.Maui.Graphics.IImage;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 30350, "IImage downsize broken starting from 9.0.80 and not fixed in 9.0.81", PlatformAffected.iOS)]
+	public partial class Issue30350 : TestContentPage
+	{
+		private ImageSource _originalSource;
+		private string _originalSize;
+		private ImageSource _downsizedSource;
+		private string _downsizedImageSize;
+
+		public Issue30350()
+		{
+			InitializeComponent();
+			BindingContext = this;
+		}
+
+		protected override void Init()
+		{
+			// Delay loading to ensure all controls are initialized
+			Dispatcher.Dispatch(async () => await LoadImagesAsync());
+		}
+
+		public ImageSource OriginalSource
+		{
+			get => _originalSource;
+			set
+			{
+				if (Equals(value, _originalSource))
+					return;
+				_originalSource = value;
+				OnPropertyChanged();
+			}
+		}
+
+		public ImageSource DownsizedSource
+		{
+			get => _downsizedSource;
+			set
+			{
+				if (Equals(value, _downsizedSource))
+					return;
+				_downsizedSource = value;
+				OnPropertyChanged();
+			}
+		}
+
+		public string OriginalSize
+		{
+			get => _originalSize;
+			set
+			{
+				if (value == _originalSize)
+					return;
+				_originalSize = value;
+				OnPropertyChanged();
+			}
+		}
+
+		public string DownsizedImageSize
+		{
+			get => _downsizedImageSize;
+			set
+			{
+				if (value == _downsizedImageSize)
+					return;
+				_downsizedImageSize = value;
+				OnPropertyChanged();
+			}
+		}
+
+		private async Task LoadImagesAsync()
+		{
+			try
+			{
+				// Check if StatusLabel is available
+				if (StatusLabel != null)
+					StatusLabel.Text = "Loading images...";
+
+				// Load original image from embedded resource  
+				OriginalSource = ImageSource.FromResource("Controls.TestCases.HostApp.Resources.Images.royals.png");
+
+				// Load IImage for processing
+				var assembly = GetType().GetTypeInfo().Assembly;
+				using var stream = assembly.GetManifestResourceStream("Controls.TestCases.HostApp.Resources.Images.royals.png");
+
+				if (stream == null)
+				{
+					if (StatusLabel != null)
+						StatusLabel.Text = "Error: Could not load royals.png resource";
+					return;
+				}
+
+				var originalImage = PlatformImage.FromStream(stream);
+				if (originalImage == null)
+				{
+					if (StatusLabel != null)
+						StatusLabel.Text = "Error: Could not create IImage from stream";
+					return;
+				}
+
+				OriginalSize = $"{originalImage.Width}x{originalImage.Height}";
+
+				// Perform downsize operation - this is where the issue occurs in MAUI 9.0.80+
+				// The downsized image should be flipped/rotated incorrectly on iOS 9.0.80+
+				var downsizedImage = originalImage.Downsize(100);
+				if (downsizedImage == null)
+				{
+					if (StatusLabel != null)
+						StatusLabel.Text = "Error: Downsize operation failed";
+					return;
+				}
+
+				DownsizedImageSize = $"{downsizedImage.Width}x{downsizedImage.Height}";
+
+				// Convert downsized IImage to ImageSource
+				using var downsizedStream = new MemoryStream();
+				await downsizedImage.SaveAsync(downsizedStream, ImageFormat.Png);
+				downsizedStream.Position = 0;
+
+				DownsizedSource = ImageSource.FromStream(() => new MemoryStream(downsizedStream.ToArray()));
+
+				if (StatusLabel != null)
+					StatusLabel.Text = "Images loaded. Compare for flipping/rotation issues in MAUI 9.0.80+";
+			}
+			catch (Exception ex)
+			{
+				if (StatusLabel != null)
+					StatusLabel.Text = $"Error loading images: {ex.Message}";
+			}
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue30426.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<controls:TestContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+                          xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+                          xmlns:controls="clr-namespace:Maui.Controls.Sample.Issues"
+                          x:Class="Maui.Controls.Sample.Issues.Issue30426">
+    <ScrollView>
+        <VerticalStackLayout Padding="20"
+                Spacing="15">
+            <Label
+                AutomationId="WaitForStubControl"
+                Text="Issue 30426 - IImage Downsize() throws Exception in 9.0.81 when called from background thread on iOS"
+                FontSize="16"
+                HorizontalOptions="Center"/>
+
+            <!-- Image display area -->
+            <Border
+                Stroke="Gray"
+                StrokeThickness="1"
+                BackgroundColor="LightGray"
+                HeightRequest="200"
+                WidthRequest="300"
+                HorizontalOptions="Center">
+                <Image x:Name="DisplayImage"
+                       AutomationId="DisplayImage"
+                       Aspect="AspectFit"
+                        Source="royals.png"/>
+            </Border>
+
+            <!-- File info display -->
+            <Label x:Name="FileSizeLabel"
+                   AutomationId="FileSizeLabel"
+                   Text="File Size: Not loaded"
+                   FontSize="14"/>
+
+            <Label x:Name="DimensionsLabel"
+                   AutomationId="DimensionsLabel"
+                   Text="Dimensions: Not loaded"
+                   FontSize="14"/>
+
+            <!-- Load Image Button -->
+            <Button
+                x:Name="LoadImageButton"
+                AutomationId="LoadImageButton"
+                Text="Load Embedded Image (royals.png)"
+                Clicked="OnSelectImageClicked"/>
+
+            <Label Text="Resize Percentage:"
+                    FontSize="16"/>
+            <Label x:Name="ResizeLabel"
+                    Text="50%"/>
+            <Slider x:Name="ResizeSlider"
+                    AutomationId="ResizeSlider"
+                    Minimum="10"
+                    Maximum="100"
+                    Value="50"
+                    ValueChanged="OnResizeSliderChanged"/>
+
+            <Button
+                x:Name="ProcessImageButton"
+                AutomationId="ProcessImageButton"
+                Text="Process Image (IImage.Downsize())"
+                Clicked="OnProcessImageClicked"/>
+
+            <!-- Status and results -->
+            <Label x:Name="StatusLabel"
+                   AutomationId="StatusLabel"
+                   Text="Status: Ready"
+                   FontSize="14"
+                   TextColor="Blue"/>
+
+            <Label x:Name="ErrorLabel"
+                   AutomationId="ErrorLabel"
+                   Text=""
+                   FontSize="14"
+                   TextColor="Red"
+                   IsVisible="False"/>
+
+        </VerticalStackLayout>
+    </ScrollView>
+</controls:TestContentPage>