Cleanup GDI interop in System.Drawing.Common (#39727)

* Cleanup GDI object Interop

* Cleanup GDI region interop

* Cleanup GDI font interop

* Cleanup GDI DC interop

* Address PR feedback

src/Common/src/Interop/Windows/Gdi32/Interop.CombineRgn.cs

@@ -0,0 +1,32 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        public enum CombineMode : int
+        {
+            RGN_AND = 1,
+            RGN_XOR = 3,
+            RGN_DIFF = 4,
+        }
+
+        [DllImport(Libraries.Gdi32, SetLastError = true, ExactSpelling = true)]
+        public static extern RegionType CombineRgn(IntPtr hrgnDst, IntPtr hrgnSrc1, IntPtr hrgnSrc2, CombineMode iMode);
+
+        public static RegionType CombineRgn(HandleRef hrgnDst, HandleRef hrgnSrc1, HandleRef hrgnSrc2, CombineMode iMode)
+        {
+            RegionType result = CombineRgn(hrgnDst.Handle, hrgnSrc1.Handle, hrgnSrc2.Handle, iMode);
+            GC.KeepAlive(hrgnDst.Wrapper);
+            GC.KeepAlive(hrgnSrc1.Wrapper);
+            GC.KeepAlive(hrgnSrc2.Wrapper);
+            return result;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.CreateCompatibleDC.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern IntPtr CreateCompatibleDC(IntPtr hdc);
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.CreateDC.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true, CharSet = CharSet.Unicode)]
+        public static extern IntPtr CreateDCW(string pwszDriver, string pwszDevice, string pszPort, IntPtr pdm);
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.CreateFontIndirect.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true, CharSet = CharSet.Unicode)]
+        public static extern IntPtr CreateFontIndirectW(ref User32.LOGFONT lplf);
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.CreateIC.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true, CharSet = CharSet.Unicode)]
+        public static extern IntPtr CreateICW(string pszDriver, string pszDevice, string pszPort, IntPtr pdm);
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.CreateRectRgn.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern IntPtr CreateRectRgn(int x1, int y1, int x2, int y2);
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.DeleteDC.cs

@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern bool DeleteDC(IntPtr hdc);
+
+        public static bool DeleteDC(HandleRef hdc)
+        {
+            bool result = DeleteDC(hdc.Handle);
+            GC.KeepAlive(hdc.Wrapper);
+            return result;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.DeleteObject.cs

@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern bool DeleteObject(IntPtr ho);
+
+        public static bool DeleteObject(HandleRef ho)
+        {
+            bool result = DeleteObject(ho.Handle);
+            GC.KeepAlive(ho.Wrapper);
+            return result;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.GetClipRgn.cs

@@ -0,0 +1,31 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern int GetClipRgn(IntPtr hdc, IntPtr hrgn);
+
+        public static int GetClipRgn(HandleRef hdc, IntPtr hrgn)
+        {
+            int result = GetClipRgn(hdc.Handle, hrgn);
+            GC.KeepAlive(hdc.Wrapper);
+            return result;
+        }
+
+        public static int GetClipRgn(HandleRef hdc, HandleRef hrgn)
+        {
+            int result = GetClipRgn(hdc.Handle, hrgn.Handle);
+            GC.KeepAlive(hdc.Wrapper);
+            GC.KeepAlive(hrgn.Wrapper);
+            return result;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.GetCurrentObject.cs

@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern IntPtr GetCurrentObject(IntPtr hdc, ObjectType type);
+
+        public static IntPtr GetCurrentObject(HandleRef hdc, ObjectType type)
+        {
+            IntPtr result = GetCurrentObject(hdc.Handle, type);
+            GC.KeepAlive(hdc.Wrapper);
+            return result;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.GetDeviceCaps.cs

@@ -0,0 +1,44 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        public enum DeviceCapability : int
+        {
+            TECHNOLOGY = 2,
+            VERTRES = 10,
+            HORZRES = 8,
+            BITSPIXEL = 12,
+            PLANES = 14,
+            LOGPIXELSX = 88,
+            LOGPIXELSY = 90,
+            PHYSICALWIDTH = 110,
+            PHYSICALHEIGHT = 111,
+            PHYSICALOFFSETX = 112,
+            PHYSICALOFFSETY = 113
+        }
+
+        public static class DeviceTechnology
+        {
+            public const int DT_PLOTTER = 0;
+            public const int DT_RASPRINTER = 2;
+        }
+
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern int GetDeviceCaps(IntPtr hdc, DeviceCapability index);
+
+        public static int GetDeviceCaps(HandleRef hdc, DeviceCapability index)
+        {
+            int caps = GetDeviceCaps(hdc.Handle, index);
+            GC.KeepAlive(hdc.Wrapper);
+            return caps;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.GetObjectType.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern ObjectType GetObjectType(IntPtr h);
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.GetRgnBox.cs

@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern RegionType GetRgnBox(IntPtr hrgn, ref RECT lprc);
+
+        public static RegionType GetRgnBox(HandleRef hrgn, ref RECT lprc)
+        {
+            RegionType result = GetRgnBox(hrgn.Handle, ref lprc);
+            GC.KeepAlive(hrgn.Wrapper);
+            return result;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.GetStockObject.cs

@@ -0,0 +1,20 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        public enum StockObject : int
+        {
+            DEFAULT_GUI_FONT = 17
+        }
+
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern IntPtr GetStockObject(StockObject i);
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.ObjectType.cs

@@ -0,0 +1,27 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        public enum ObjectType : int
+        {
+            OBJ_PEN = 1,
+            OBJ_BRUSH = 2,
+            OBJ_DC = 3,
+            OBJ_METADC = 4,
+            OBJ_PAL = 5,
+            OBJ_FONT = 6,
+            OBJ_BITMAP = 7,
+            OBJ_REGION = 8,
+            OBJ_METAFILE = 9,
+            OBJ_MEMDC = 10,
+            OBJ_EXTPEN = 11,
+            OBJ_ENHMETADC = 12,
+            OBJ_ENHMETAFILE = 13,
+            OBJ_COLORSPACE = 14
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.OffsetViewportOrgEx.cs

@@ -0,0 +1,23 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Drawing;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [DllImport(Libraries.Gdi32, ExactSpelling = true)]
+        public static extern bool OffsetViewportOrgEx(IntPtr hdc, int x, int y, ref Point lppt);
+
+        public static bool OffsetViewportOrgEx(HandleRef hdc, int x, int y, ref Point lppt)
+        {
+            bool result = OffsetViewportOrgEx(hdc.Handle, x, y, ref lppt);
+            GC.KeepAlive(hdc.Wrapper);
+            return result;
+        }
+    }
+}

src/Common/src/Interop/Windows/Gdi32/Interop.RECT.cs

@@ -0,0 +1,23 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Drawing;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Gdi32
+    {
+        [StructLayout(LayoutKind.Sequential)]
+        public struct RECT
+        {
+            public int left;
+            public int top;
+            public int right;
+            public int bottom;
+
+            public Size Size => new Size(right - left, bottom - top);
+        }
+    }
+}