feat: Font manifest (backport #17118)

build/nuget/Uno.WinUI.Skia.Gtk.props

@@ -4,6 +4,7 @@
 	<PropertyGroup>
 		<IsUnoHead>true</IsUnoHead>
 		<UnoRuntimeIdentifier>Skia</UnoRuntimeIdentifier>
+		<SupportsFontManifest>true</SupportsFontManifest>
 	</PropertyGroup>
 
 </Project>

build/nuget/Uno.WinUI.Skia.Linux.FrameBuffer.props

@@ -4,6 +4,7 @@
 	<PropertyGroup>
 		<IsUnoHead>true</IsUnoHead>
 		<UnoRuntimeIdentifier>Skia</UnoRuntimeIdentifier>
+		<SupportsFontManifest>true</SupportsFontManifest>
 		<UnoIsSkiaLinuxFramebufferHead>true</UnoIsSkiaLinuxFramebufferHead>
 	</PropertyGroup>
 

build/nuget/Uno.WinUI.Skia.MacOS.props

@@ -4,6 +4,7 @@
 	<PropertyGroup>
 		<IsUnoHead>true</IsUnoHead>
 		<UnoRuntimeIdentifier>Skia</UnoRuntimeIdentifier>
+		<SupportsFontManifest>true</SupportsFontManifest>
 	</PropertyGroup>
 
 </Project>

build/nuget/Uno.WinUI.Skia.Wpf.props

@@ -4,6 +4,7 @@
   <PropertyGroup>
 	<IsUnoHead>true</IsUnoHead>
 	<UnoRuntimeIdentifier>Skia</UnoRuntimeIdentifier>
+	<SupportsFontManifest>true</SupportsFontManifest>
   </PropertyGroup>
 
 </Project>

build/nuget/Uno.WinUI.Skia.X11.props

@@ -4,6 +4,7 @@
 	<PropertyGroup>
 		<IsUnoHead>true</IsUnoHead>
 		<UnoRuntimeIdentifier>Skia</UnoRuntimeIdentifier>
+		<SupportsFontManifest>true</SupportsFontManifest>
 	</PropertyGroup>
 
 </Project>

build/nuget/uno.winui.common.props

@@ -7,5 +7,8 @@
 				'$(UnoDisableOmnisharpTargetsImport)'=='' 
 				and '$(UnoForceSingleTFM)' == 'true'
 				and Exists($([MSBuild]::GetPathOfFileAbove('uno.vscode.props', '$(MSBuildThisFileDirectory)../.vscode/')))" />
-
+
+	<PropertyGroup>
+		<SupportsFontManifest Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)'))=='ios'">true</SupportsFontManifest>
+	</PropertyGroup>
 </Project>

src/SamplesApp/UITests.Shared/Assets/Fonts/OpenSans/OpenSans.ttf.manifest

@@ -0,0 +1,34 @@
+ {
+	"fonts": [
+        {
+			"font_style": "italic",
+			"font_weight": 400,
+			"font_stretch": "Condensed",
+			"family_name": "ms-appx:///Assets/Fonts/OpenSans/OpenSans_Condensed-MediumItalic.ttf"
+		},
+		{
+			"font_style": "normal",
+			"font_weight": 400,
+			"font_stretch": "SemiCondensed",
+			"family_name": "ms-appx:///Assets/Fonts/OpenSans/OpenSans_SemiCondensed-Regular.ttf"
+		},
+		{
+			"font_style": "normal",
+			"font_weight": 600,
+			"font_stretch": "SemiCondensed",
+			"family_name": "ms-appx:///Assets/Fonts/OpenSans/OpenSans_SemiCondensed-SemiBold.ttf"
+		},
+        {
+			"font_style": "normal",
+			"font_weight": 700,
+			"font_stretch": "Normal",
+			"family_name": "ms-appx:///Assets/Fonts/OpenSans/OpenSans-Bold.ttf"
+		},
+        {
+			"font_style": "normal",
+			"font_weight": 400,
+			"font_stretch": "Normal",
+			"family_name": "ms-appx:///Assets/Fonts/OpenSans/OpenSans-Regular.ttf"
+		},
+	]
+} 

src/SamplesApp/UITests.Shared/UITests.Shared.projitems

@@ -9574,6 +9574,8 @@
     <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\Even Badder Mofo.ttf" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\FamilyGuy-4grW.ttf" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\Nillambari-K7y1W.ttf" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\OpenSans\*.ttf" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\OpenSans\OpenSans.ttf.manifest" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\Renaiss-Italic.ttf" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\RoteFlora.ttf" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\Formats\animated.gif" />

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Controls/Given_TextBlock.cs

@@ -35,14 +35,96 @@ namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Controls
 	[RunsOnUIThread]
 	public class Given_TextBlock
 	{
+#if __ANDROID__
+		[Ignore("Visually looks good, but fails :(")]
+#endif
+		[TestMethod]
+		[DataRow((ushort)400, FontStyle.Italic, FontStretch.Condensed, "ms-appx:///Assets/Fonts/OpenSans/OpenSans_Condensed-MediumItalic.ttf")]
+		[DataRow((ushort)400, FontStyle.Normal, FontStretch.SemiCondensed, "ms-appx:///Assets/Fonts/OpenSans/OpenSans_SemiCondensed-Regular.ttf")]
+		[DataRow((ushort)600, FontStyle.Normal, FontStretch.SemiCondensed, "ms-appx:///Assets/Fonts/OpenSans/OpenSans_SemiCondensed-SemiBold.ttf")]
+		[DataRow((ushort)700, FontStyle.Normal, FontStretch.Normal, "ms-appx:///Assets/Fonts/OpenSans/OpenSans-Bold.ttf")]
+		[DataRow((ushort)400, FontStyle.Normal, FontStretch.Normal, "ms-appx:///Assets/Fonts/OpenSans/OpenSans-Regular.ttf")]
+		public async Task When_Font_Has_Manifest(ushort weight, FontStyle style, FontStretch stretch, string ttfFile)
+		{
+			if (!ApiInformation.IsTypePresent("Microsoft.UI.Xaml.Media.Imaging.RenderTargetBitmap"))
+			{
+				Assert.Inconclusive(); // System.NotImplementedException: RenderTargetBitmap is not supported on this platform.;
+			}
+
+			var SUT = new TextBlock
+			{
+				Text = "Hello World!",
+				FontSize = 18,
+				FontStyle = style,
+				FontStretch = stretch,
+				FontWeight = new FontWeight(weight),
+				FontFamily = new FontFamily("ms-appx:///Assets/Fonts/OpenSans/OpenSans.ttf"),
+			};
+			var SUTContainer = new Border()
+			{
+				Width = 200,
+				Height = 100,
+				Child = SUT
+			};
+
+			var expectedTB = new TextBlock
+			{
+				Text = "Hello World!",
+				FontSize = 18,
+				FontFamily = new FontFamily(ttfFile)
+			};
+			var expectedTBContainer = new Border()
+			{
+				Width = 200,
+				Height = 100,
+				Child = expectedTB
+			};
+
+			var differentTtf = "ms-appx:///Assets/Fonts/OpenSans/OpenSans-Bold.ttf";
+			if (ttfFile == differentTtf)
+			{
+				differentTtf = "ms-appx:///Assets/Fonts/OpenSans/OpenSans-Regular.ttf";
+			}
+
+			var differentTB = new TextBlock
+			{
+				Text = "Hello World!",
+				FontSize = 18,
+				FontFamily = new FontFamily(differentTtf),
+			};
+			var differentTBContainer = new Border()
+			{
+				Width = 200,
+				Height = 100,
+				Child = differentTB
+			};
+
+			var sp = new StackPanel()
+			{
+				Children =
+				{
+					SUTContainer,
+					expectedTBContainer,
+					differentTBContainer,
+				},
+			};
+
+			await UITestHelper.Load(sp);
+			var actual = await UITestHelper.ScreenShot(SUTContainer);
+			var expected = await UITestHelper.ScreenShot(expectedTBContainer);
+			var different = await UITestHelper.ScreenShot(differentTBContainer);
+			await ImageAssert.AreEqualAsync(actual, expected);
+			await ImageAssert.AreNotEqualAsync(actual, different);
+		}
+
 #if __SKIA__
 		[TestMethod]
 		// It looks like CI might not have any installed fonts with Chinese characters which could cause the test to fail
 		[Ignore("Fails on CI")]
 		public async Task Check_FontFallback()
 		{
 			var SUT = new TextBlock { Text = "示例文本", FontSize = 24 };
-			var skFont = FontDetailsCache.GetFont(SUT.FontFamily?.Source, (float)SUT.FontSize, SUT.FontWeight, SUT.FontStyle).SKFont;
+			var skFont = FontDetailsCache.GetFont(SUT.FontFamily?.Source, (float)SUT.FontSize, SUT.FontWeight, SUT.FontStretch, SUT.FontStyle).SKFont;
 			Assert.IsFalse(skFont.ContainsGlyph(SUT.Text[0]));
 
 			var fallbackFont = SKFontManager.Default.MatchCharacter(SUT.Text[0]);

src/Uno.UI.Toolkit/Storage/StorageFileHelper.cs

@@ -1,11 +1,11 @@
 #nullable enable
-using System.Threading;
 using System;
-using System.Threading.Tasks;
-using Uno;
-using System.Reflection;
 using System.Collections.Generic;
 using System.IO;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+using Uno;
 
 namespace Uno.UI.Toolkit;
 
@@ -16,14 +16,16 @@ public partial class StorageFileHelper
 	/// </summary>
 	/// <param name="fileName">relative file path</param>
 	/// <returns>A task that will complete with a result of true if file exists, otherwise with a result of false.</returns>
-	public static async Task<bool> ExistsInPackage(string fileName) => await FileExistsInPackage(fileName);
-
-#if IS_UNIT_TESTS || __NETSTD_REFERENCE__
-	private static Task<bool> FileExistsInPackage(string fileName)
-		=> throw new NotImplementedException();
+	public static async Task<bool> ExistsInPackage(string fileName)
+	{
+#if HAS_UNO
+		return await Windows.Storage.Helpers.StorageFileHelper.ExistsInPackage(fileName);
+#else
+		return await FileExistsInPackage(fileName);
 #endif
+	}
 
-#if __SKIA__ || WINDOWS || WINAPPSDK || WINDOWS_UWP || WINUI
+#if !HAS_UNO
 	private static Task<bool> FileExistsInPackage(string fileName)
 	{
 		var executingPath = Assembly.GetExecutingAssembly().Location;

src/Uno.UI/Controls/PaintPool.Android.cs

@@ -23,6 +23,7 @@ internal class TextPaintPool
 		private record Entry(
 			FontWeight FontWeight,
 			FontStyle FontStyle,
+			FontStretch FontStretch,
 			FontFamily FontFamily,
 			double FontSize,
 			double CharacterSpacing,
@@ -38,6 +39,7 @@ private class EntryComparer : IEqualityComparer<Entry>
 			public bool Equals(Entry x, Entry y) =>
 				x.FontWeight == y.FontWeight
 				&& x.FontStyle == y.FontStyle
+				&& x.FontStretch == y.FontStretch
 				&& x.FontFamily == y.FontFamily
 				&& x.Foreground == y.Foreground
 				&& x.FontSize == y.FontSize
@@ -48,6 +50,7 @@ public bool Equals(Entry x, Entry y) =>
 			public int GetHashCode(Entry entry) =>
 				entry.FontWeight.GetHashCode()
 				^ entry.FontStyle.GetHashCode()
+				^ entry.FontStretch.GetHashCode()
 				^ entry.FontFamily?.GetHashCode() ?? 0
 				^ entry.Foreground.GetHashCode()
 				^ entry.FontSize.GetHashCode()
@@ -74,19 +77,19 @@ public int GetHashCode(Entry entry) =>
 		/// can be tricky to place properly.
 		/// </remarks>
 		/// <returns>A <see cref="TextPaint"/> instance.</returns>
-		public static TextPaint GetPaint(FontWeight fontWeight, FontStyle fontStyle, FontFamily fontFamily, double fontSize, double characterSpacing, Windows.UI.Color foreground, Shader shader, BaseLineAlignment baselineAlignment, TextDecorations textDecorations)
+		public static TextPaint GetPaint(FontWeight fontWeight, FontStyle fontStyle, FontStretch fontStretch, FontFamily fontFamily, double fontSize, double characterSpacing, Windows.UI.Color foreground, Shader shader, BaseLineAlignment baselineAlignment, TextDecorations textDecorations)
 		{
 			if (shader != null)
 			{
 				// The "Shader" native object can't be use as a cache key
-				return InnerBuildPaint(fontWeight, fontStyle, fontFamily, fontSize, characterSpacing, foreground, shader, baselineAlignment, textDecorations);
+				return InnerBuildPaint(fontWeight, fontStyle, fontStretch, fontFamily, fontSize, characterSpacing, foreground, shader, baselineAlignment, textDecorations);
 			}
 
-			var key = new Entry(fontWeight, fontStyle, fontFamily, fontSize, characterSpacing, foreground, baselineAlignment, textDecorations);
+			var key = new Entry(fontWeight, fontStyle, fontStretch, fontFamily, fontSize, characterSpacing, foreground, baselineAlignment, textDecorations);
 
 			if (!_entries.TryGetValue(key, out var paint))
 			{
-				_entries.Add(key, paint = InnerBuildPaint(fontWeight, fontStyle, fontFamily, fontSize, characterSpacing, foreground, shader, baselineAlignment, textDecorations));
+				_entries.Add(key, paint = InnerBuildPaint(fontWeight, fontStyle, fontStretch, fontFamily, fontSize, characterSpacing, foreground, shader, baselineAlignment, textDecorations));
 				_entriesList.Add(key);
 
 				TryScavenge();
@@ -123,15 +126,15 @@ private static void TryScavenge()
 			}
 		}
 
-		private static TextPaint InnerBuildPaint(FontWeight fontWeight, FontStyle fontStyle, FontFamily fontFamily, double fontSize, double characterSpacing, Color foreground, Shader shader, BaseLineAlignment baselineAlignment, TextDecorations textDecorations)
+		private static TextPaint InnerBuildPaint(FontWeight fontWeight, FontStyle fontStyle, FontStretch fontStretch, FontFamily fontFamily, double fontSize, double characterSpacing, Color foreground, Shader shader, BaseLineAlignment baselineAlignment, TextDecorations textDecorations)
 		{
 			var paintSpecs = BuildPaintValueSpecs(fontSize, characterSpacing);
 
 			return TextPaintPoolNative.BuildPaint(
 				paintSpecs.density,
 				paintSpecs.textSize,
 				paintSpecs.letterSpacing,
-				FontHelper.FontFamilyToTypeFace(fontFamily, fontWeight, fontStyle),
+				FontHelper.FontFamilyToTypeFace(fontFamily, fontWeight, fontStyle, fontStretch),
 				(int)((Android.Graphics.Color)foreground),
 				(textDecorations & TextDecorations.Underline) == TextDecorations.Underline,
 				(textDecorations & TextDecorations.Strikethrough) == TextDecorations.Strikethrough,