From e486f38515a53230b20e5d28087c64730ae997d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexander=20K=C3=B6plinger?= <alex.koeplinger@outlook.com>
Date: Wed, 8 Mar 2023 14:29:44 +0100
Subject: [PATCH] Add type-forwarders for Xamarin.Android compatibility to
 System.Drawing.Common.dll (#82839)

The legacy Xamarin.Android version of System.Drawing.Common.dll contained these types, add forwarders so we don't get a TypeLoadException when using an assembly compiled against that in modern .NET Android.

Fixes #82829
---
 .../src/CompatibilitySuppressions.xml         | 147 +++++++++++++++++-
 .../src/System.Drawing.Common.Forwards.cs     |  14 ++
 .../src/System.Drawing.Common.csproj          |   1 +
 3 files changed, 161 insertions(+), 1 deletion(-)
 create mode 100644 src/libraries/System.Drawing.Common/src/System.Drawing.Common.Forwards.cs

diff --git a/src/libraries/System.Drawing.Common/src/CompatibilitySuppressions.xml b/src/libraries/System.Drawing.Common/src/CompatibilitySuppressions.xml
index 40616c4cae530..a20c679664646 100644
--- a/src/libraries/System.Drawing.Common/src/CompatibilitySuppressions.xml
+++ b/src/libraries/System.Drawing.Common/src/CompatibilitySuppressions.xml
@@ -30,6 +30,151 @@
     <Left>lib/netstandard2.0/System.Drawing.Common.dll</Left>
     <Right>lib/net462/System.Drawing.Common.dll</Right>
   </Suppression>
+  <!-- the following suppression are for back-compatibility with legacy Xamarin which had these types in System.Drawing.Common.dll -->
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Color</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.KnownColor</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Point</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.PointF</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Rectangle</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.RectangleF</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Size</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.SizeF</Target>
+    <Left>ref/net6.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net6.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Color</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.KnownColor</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Point</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.PointF</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Rectangle</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.RectangleF</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Size</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.SizeF</Target>
+    <Left>ref/net7.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net7.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Color</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.KnownColor</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Point</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.PointF</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Rectangle</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.RectangleF</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.Size</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:System.Drawing.SizeF</Target>
+    <Left>ref/net8.0/System.Drawing.Common.dll</Left>
+    <Right>lib/net8.0/System.Drawing.Common.dll</Right>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0002</DiagnosticId>
     <Target>F:System.Drawing.Imaging.Encoder.ColorSpace</Target>
@@ -96,4 +241,4 @@
     <Left>lib/netstandard2.0/System.Drawing.Common.dll</Left>
     <Right>lib/net462/System.Drawing.Common.dll</Right>
   </Suppression>
-</Suppressions>
\ No newline at end of file
+</Suppressions>
diff --git a/src/libraries/System.Drawing.Common/src/System.Drawing.Common.Forwards.cs b/src/libraries/System.Drawing.Common/src/System.Drawing.Common.Forwards.cs
new file mode 100644
index 0000000000000..82ba631d1ce22
--- /dev/null
+++ b/src/libraries/System.Drawing.Common/src/System.Drawing.Common.Forwards.cs
@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// This is required for back-compatibility with legacy Xamarin which had these types in System.Drawing.Common.dll
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.Color))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.ColorTranslator))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.KnownColor))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.Point))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.PointF))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.Rectangle))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.RectangleF))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.Size))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.SizeF))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Drawing.SystemColors))]
diff --git a/src/libraries/System.Drawing.Common/src/System.Drawing.Common.csproj b/src/libraries/System.Drawing.Common/src/System.Drawing.Common.csproj
index 1d2060a61e8e3..0cb66ee946665 100644
--- a/src/libraries/System.Drawing.Common/src/System.Drawing.Common.csproj
+++ b/src/libraries/System.Drawing.Common/src/System.Drawing.Common.csproj
@@ -30,6 +30,7 @@ Since .NET 7, non-Windows platforms are not supported, even with the runtime con
 
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
     <Compile Include="SRDescriptionAttribute.cs" />
+    <Compile Include="System.Drawing.Common.Forwards.cs" />
     <Compile Include="System\Drawing\Bitmap.cs" />
     <Compile Include="System\Drawing\BitmapSuffixInSameAssemblyAttribute.cs" />
     <Compile Include="System\Drawing\BitmapSuffixInSatelliteAssemblyAttribute.cs" />