Cleaning up and finalizing the d2d1*helper bindings

sources/Interop/D2D1/um/d2d1/D2D1.cs

@@ -14,6 +14,20 @@ public static unsafe partial class D2D1
         [return: NativeTypeName("HRESULT")]
         public static extern int D2D1CreateFactory(D2D1_FACTORY_TYPE factoryType, [NativeTypeName("const IID &")] Guid* riid, [NativeTypeName("const D2D1_FACTORY_OPTIONS *")] D2D1_FACTORY_OPTIONS* pFactoryOptions, [NativeTypeName("void **")] void** ppIFactory);
 
+        [DllImport(LibraryPath, CallingConvention = CallingConvention.StdCall, EntryPoint = "D2D1MakeRotateMatrix", ExactSpelling = true)]
+        public static extern void D2D1MakeRotateMatrix([NativeTypeName("FLOAT")] float angle, [NativeTypeName("D2D1_POINT_2F")] D2D_POINT_2F center, [NativeTypeName("D2D1_MATRIX_3X2_F *")] D2D_MATRIX_3X2_F* matrix);
+
+        [DllImport(LibraryPath, CallingConvention = CallingConvention.StdCall, EntryPoint = "D2D1MakeSkewMatrix", ExactSpelling = true)]
+        public static extern void D2D1MakeSkewMatrix([NativeTypeName("FLOAT")] float angleX, [NativeTypeName("FLOAT")] float angleY, [NativeTypeName("D2D1_POINT_2F")] D2D_POINT_2F center, [NativeTypeName("D2D1_MATRIX_3X2_F *")] D2D_MATRIX_3X2_F* matrix);
+
+        [DllImport(LibraryPath, CallingConvention = CallingConvention.StdCall, EntryPoint = "D2D1IsMatrixInvertible", ExactSpelling = true)]
+        [return: NativeTypeName("BOOL")]
+        public static extern int D2D1IsMatrixInvertible([NativeTypeName("const D2D1_MATRIX_3X2_F *")] D2D_MATRIX_3X2_F* matrix);
+
+        [DllImport(LibraryPath, CallingConvention = CallingConvention.StdCall, EntryPoint = "D2D1InvertMatrix", ExactSpelling = true)]
+        [return: NativeTypeName("BOOL")]
+        public static extern int D2D1InvertMatrix([NativeTypeName("D2D1_MATRIX_3X2_F *")] D2D_MATRIX_3X2_F* matrix);
+
         [return: NativeTypeName("HRESULT")]
         public static int D2D1CreateFactory(D2D1_FACTORY_TYPE factoryType, [NativeTypeName("const IID &")] Guid* riid, [NativeTypeName("void **")] void** factory)
         {

sources/Interop/D2D1/um/d2d1/D2D1_ARC_SEGMENT.Manual.cs

@@ -3,17 +3,15 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_ARC_SEGMENT
     {
-        public D2D1_ARC_SEGMENT(in D2D_POINT_2F point, in D2D_SIZE_F size, float rotationAngle, D2D1_SWEEP_DIRECTION sweepDirection, D2D1_ARC_SIZE arcSize)
+        public D2D1_ARC_SEGMENT([NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F point, [NativeTypeName("const D2D1_SIZE_F &")] in D2D_SIZE_F size, [NativeTypeName("FLOAT")] float rotationAngle, D2D1_SWEEP_DIRECTION sweepDirection, D2D1_ARC_SIZE arcSize)
         {
-            this.point = point;
-            this.size = size;
-            this.rotationAngle = rotationAngle;
-            this.sweepDirection = sweepDirection;
-            this.arcSize = arcSize;
+            this = ArcSegment(point, size, rotationAngle, sweepDirection, arcSize);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_BEZIER_SEGMENT.Manual.cs

@@ -3,15 +3,15 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_BEZIER_SEGMENT
     {
-        public D2D1_BEZIER_SEGMENT(in D2D_POINT_2F point1, in D2D_POINT_2F point2, in D2D_POINT_2F point3)
+        public D2D1_BEZIER_SEGMENT([NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F point1, [NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F point2, [NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F point3)
         {
-            this.point1 = point1;
-            this.point2 = point2;
-            this.point3 = point3;
+            this = BezierSegment(point1, point2, point3);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_BITMAP_BRUSH_PROPERTIES.Manual.cs

@@ -3,17 +3,19 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+using static TerraFX.Interop.D2D1_BITMAP_INTERPOLATION_MODE;
+using static TerraFX.Interop.D2D1_EXTEND_MODE;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_BITMAP_BRUSH_PROPERTIES
     {
-        public static readonly D2D1_BITMAP_BRUSH_PROPERTIES DEFAULT = new D2D1_BITMAP_BRUSH_PROPERTIES(D2D1_EXTEND_MODE.D2D1_EXTEND_MODE_CLAMP, D2D1_EXTEND_MODE.D2D1_EXTEND_MODE_CLAMP, D2D1_BITMAP_INTERPOLATION_MODE.D2D1_BITMAP_INTERPOLATION_MODE_LINEAR);
+        public static readonly D2D1_BITMAP_BRUSH_PROPERTIES DEFAULT = new D2D1_BITMAP_BRUSH_PROPERTIES(D2D1_EXTEND_MODE_CLAMP, D2D1_EXTEND_MODE_CLAMP, D2D1_BITMAP_INTERPOLATION_MODE_LINEAR);
 
-        public D2D1_BITMAP_BRUSH_PROPERTIES(D2D1_EXTEND_MODE extendModeX, D2D1_EXTEND_MODE extendModeY, D2D1_BITMAP_INTERPOLATION_MODE interpolationMode)
+        public D2D1_BITMAP_BRUSH_PROPERTIES(D2D1_EXTEND_MODE extendModeX = D2D1_EXTEND_MODE_CLAMP, D2D1_EXTEND_MODE extendModeY = D2D1_EXTEND_MODE_CLAMP, D2D1_BITMAP_INTERPOLATION_MODE interpolationMode = D2D1_BITMAP_INTERPOLATION_MODE_LINEAR)
         {
-            this.extendModeX = extendModeX;
-            this.extendModeY = extendModeY;
-            this.interpolationMode = interpolationMode;
+            this = BitmapBrushProperties(extendModeX, extendModeY, interpolationMode);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_BITMAP_PROPERTIES.Manual.cs

@@ -3,17 +3,17 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_BITMAP_PROPERTIES
     {
-        public static readonly D2D1_BITMAP_PROPERTIES DEFAULT = new D2D1_BITMAP_PROPERTIES(D2D1_PIXEL_FORMAT.DEFAULT, 96.0f, 96.0f);
+        public static readonly D2D1_BITMAP_PROPERTIES DEFAULT = new D2D1_BITMAP_PROPERTIES(default, 96.0f, 96.0f);
 
-        public D2D1_BITMAP_PROPERTIES(D2D1_PIXEL_FORMAT pixelFormat, float dpiX, float dpiY)
+        public D2D1_BITMAP_PROPERTIES([NativeTypeName("const D2D1_PIXEL_FORMAT &")] in D2D1_PIXEL_FORMAT pixelFormat = default, [NativeTypeName("FLOAT")] float dpiX = 96.0f, [NativeTypeName("FLOAT")] float dpiY = 96.0f)
         {
-            this.pixelFormat = pixelFormat;
-            this.dpiX = dpiX;
-            this.dpiY = dpiY;
+            this = BitmapProperties(pixelFormat, dpiX, dpiY);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_BRUSH_PROPERTIES.Manual.cs

@@ -4,17 +4,21 @@
 // Original source is Copyright © Microsoft. All rights reserved.
 
 using System.Runtime.InteropServices;
+using static TerraFX.Interop.D2D1;
 
 namespace TerraFX.Interop
 {
     public partial struct D2D1_BRUSH_PROPERTIES
     {
         public static readonly D2D1_BRUSH_PROPERTIES DEFAULT = new D2D1_BRUSH_PROPERTIES(1.0f, D2D_MATRIX_3X2_F.Identity);
 
-        public D2D1_BRUSH_PROPERTIES(float opacity, in D2D_MATRIX_3X2_F transform)
+        public D2D1_BRUSH_PROPERTIES([NativeTypeName("FLOAT")] float opacity = 1.0f) : this(opacity, IdentityMatrix)
         {
-            this.opacity = opacity;
-            this.transform = transform;
+        }
+
+        public D2D1_BRUSH_PROPERTIES([NativeTypeName("FLOAT"), Optional, DefaultParameterValue(1.0f)] float opacity, [NativeTypeName("const D2D1_MATRIX_3X2_F &")] in D2D_MATRIX_3X2_F transform)
+        {
+            this = BrushProperties(opacity, transform);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_DRAWING_STATE_DESCRIPTION.Manual.cs

@@ -3,19 +3,25 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using System.Runtime.InteropServices;
+using static TerraFX.Interop.D2D1;
+using static TerraFX.Interop.D2D1_ANTIALIAS_MODE;
+using static TerraFX.Interop.D2D1_TEXT_ANTIALIAS_MODE;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_DRAWING_STATE_DESCRIPTION
     {
-        public static readonly D2D1_DRAWING_STATE_DESCRIPTION DEFAULT = new D2D1_DRAWING_STATE_DESCRIPTION(D2D1_ANTIALIAS_MODE.D2D1_ANTIALIAS_MODE_PER_PRIMITIVE, D2D1_TEXT_ANTIALIAS_MODE.D2D1_TEXT_ANTIALIAS_MODE_DEFAULT, 0ul, 0ul, D2D_MATRIX_3X2_F.Identity);
+        public static readonly D2D1_DRAWING_STATE_DESCRIPTION DEFAULT = new D2D1_DRAWING_STATE_DESCRIPTION(D2D1_ANTIALIAS_MODE_PER_PRIMITIVE, D2D1_TEXT_ANTIALIAS_MODE_DEFAULT, 0, 0, IdentityMatrix);
+
+        public D2D1_DRAWING_STATE_DESCRIPTION(D2D1_ANTIALIAS_MODE antialiasMode = D2D1_ANTIALIAS_MODE_PER_PRIMITIVE, D2D1_TEXT_ANTIALIAS_MODE textAntialiasMode = D2D1_TEXT_ANTIALIAS_MODE_DEFAULT, [NativeTypeName("D2D1_TAG")] ulong tag1 = 0, [NativeTypeName("D2D1_TAG")] ulong tag2 = 0)
+            : this(antialiasMode, textAntialiasMode, tag1, tag2, IdentityMatrix)
+        {
+        }
 
-        public D2D1_DRAWING_STATE_DESCRIPTION(D2D1_ANTIALIAS_MODE antialiasMode, D2D1_TEXT_ANTIALIAS_MODE textAntialiasMode, ulong tag1, ulong tag2, D2D_MATRIX_3X2_F transform)
+        public D2D1_DRAWING_STATE_DESCRIPTION([Optional] D2D1_ANTIALIAS_MODE antialiasMode, [Optional] D2D1_TEXT_ANTIALIAS_MODE textAntialiasMode, [NativeTypeName("D2D1_TAG"), Optional] ulong tag1, [NativeTypeName("D2D1_TAG"), Optional] ulong tag2, [NativeTypeName("const D2D1_MATRIX_3X2_F &")] D2D_MATRIX_3X2_F transform)
         {
-            this.antialiasMode = antialiasMode;
-            this.textAntialiasMode = textAntialiasMode;
-            this.tag1 = tag1;
-            this.tag2 = tag2;
-            this.transform = transform;
+            this = DrawingStateDescription(antialiasMode, textAntialiasMode, tag1, tag2, transform);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_ELLIPSE.Manual.cs

@@ -3,15 +3,15 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_ELLIPSE
     {
-        public D2D1_ELLIPSE(in D2D_POINT_2F center, float radiusX, float radiusY)
+        public D2D1_ELLIPSE([NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F center, [NativeTypeName("FLOAT")] float radiusX, [NativeTypeName("FLOAT")] float radiusY)
         {
-            point = center;
-            this.radiusX = radiusX;
-            this.radiusY = radiusY;
+            this = Ellipse(center, radiusX, radiusY);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_GRADIENT_STOP.Manual.cs

@@ -3,14 +3,15 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_GRADIENT_STOP
     {
-        public D2D1_GRADIENT_STOP(float position, in DXGI_RGBA color)
+        public D2D1_GRADIENT_STOP([NativeTypeName("FLOAT")] float position, [NativeTypeName("const D2D1_COLOR_F &")] in DXGI_RGBA color)
         {
-            this.position = position;
-            this.color = color;
+            this = GradientStop(position, color);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_HWND_RENDER_TARGET_PROPERTIES.Manual.cs

@@ -4,20 +4,16 @@
 // Original source is Copyright © Microsoft. All rights reserved.
 
 using System;
+using static TerraFX.Interop.D2D1;
+using static TerraFX.Interop.D2D1_PRESENT_OPTIONS;
 
 namespace TerraFX.Interop
 {
     public partial struct D2D1_HWND_RENDER_TARGET_PROPERTIES
     {
-        public D2D1_HWND_RENDER_TARGET_PROPERTIES(IntPtr hwnd, D2D_SIZE_U pixelSize, D2D1_PRESENT_OPTIONS presentOptions = D2D1_PRESENT_OPTIONS.D2D1_PRESENT_OPTIONS_NONE)
-        {
-            this.hwnd = hwnd;
-            this.pixelSize = pixelSize;
-            this.presentOptions = presentOptions;
-        }
-
-        public D2D1_HWND_RENDER_TARGET_PROPERTIES(IntPtr hwnd, D2D1_PRESENT_OPTIONS presentOptions = D2D1_PRESENT_OPTIONS.D2D1_PRESENT_OPTIONS_NONE) : this(hwnd, new D2D_SIZE_U(0, 0), presentOptions)
+        public D2D1_HWND_RENDER_TARGET_PROPERTIES([NativeTypeName("HWND")] IntPtr hwnd, [NativeTypeName("D2D1_SIZE_U")] D2D_SIZE_U pixelSize = default, D2D1_PRESENT_OPTIONS presentOptions = D2D1_PRESENT_OPTIONS_NONE)
         {
+            this = HwndRenderTargetProperties(hwnd, pixelSize, presentOptions);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_LAYER_PARAMETERS.Manual.cs

@@ -3,21 +3,35 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using System.Runtime.InteropServices;
+using static TerraFX.Interop.D2D1;
+using static TerraFX.Interop.D2D1_ANTIALIAS_MODE;
+using static TerraFX.Interop.D2D1_LAYER_OPTIONS;
+
 namespace TerraFX.Interop
 {
     public unsafe partial struct D2D1_LAYER_PARAMETERS
     {
-        public static readonly D2D1_LAYER_PARAMETERS DEFAULT = new D2D1_LAYER_PARAMETERS(D2D_RECT_F.Infinite, null, D2D1_ANTIALIAS_MODE.D2D1_ANTIALIAS_MODE_PER_PRIMITIVE, D2D_MATRIX_3X2_F.Identity, 1.0f, null, D2D1_LAYER_OPTIONS.D2D1_LAYER_OPTIONS_NONE);
+        public static readonly D2D1_LAYER_PARAMETERS DEFAULT = new D2D1_LAYER_PARAMETERS(InfiniteRect, null, D2D1_ANTIALIAS_MODE_PER_PRIMITIVE, IdentityMatrix, 1.0f, null, D2D1_LAYER_OPTIONS_NONE);
+
+        public D2D1_LAYER_PARAMETERS([NativeTypeName("ID2D1Geometry *"), Optional] ID2D1Geometry* geometricMask, [Optional] D2D1_ANTIALIAS_MODE maskAntialiasMode, [NativeTypeName("FLOAT")] float opacity = 1.0f, [NativeTypeName("ID2D1Brush *")] ID2D1Brush* opacityBrush = null, D2D1_LAYER_OPTIONS layerOptions = D2D1_LAYER_OPTIONS_NONE)
+             : this(InfiniteRect, geometricMask, maskAntialiasMode, IdentityMatrix, opacity, opacityBrush, layerOptions)
+        {
+        }
+
+        public D2D1_LAYER_PARAMETERS([NativeTypeName("const D2D1_RECT_F")] in D2D_RECT_F contentBounds, [NativeTypeName("ID2D1Geometry *"), Optional] ID2D1Geometry* geometricMask, [Optional] D2D1_ANTIALIAS_MODE maskAntialiasMode, [NativeTypeName("FLOAT")] float opacity = 1.0f, [NativeTypeName("ID2D1Brush *")] ID2D1Brush* opacityBrush = null, D2D1_LAYER_OPTIONS layerOptions = D2D1_LAYER_OPTIONS_NONE)
+            : this(contentBounds, geometricMask, maskAntialiasMode, IdentityMatrix, opacity, opacityBrush, layerOptions)
+        {
+        }
+
+        public D2D1_LAYER_PARAMETERS([NativeTypeName("ID2D1Geometry *"), Optional] ID2D1Geometry* geometricMask, [Optional] D2D1_ANTIALIAS_MODE maskAntialiasMode, [NativeTypeName("D2D1_MATRIX_3X2_F")] D2D_MATRIX_3X2_F maskTransform, [NativeTypeName("FLOAT")] float opacity = 1.0f, [NativeTypeName("ID2D1Brush *")] ID2D1Brush* opacityBrush = null, D2D1_LAYER_OPTIONS layerOptions = D2D1_LAYER_OPTIONS_NONE)
+            : this(InfiniteRect, geometricMask, maskAntialiasMode, maskTransform, opacity, opacityBrush, layerOptions)
+        {
+        }
 
-        public D2D1_LAYER_PARAMETERS(D2D_RECT_F contentBounds, ID2D1Geometry* geometricMask, D2D1_ANTIALIAS_MODE maskAntialiasMode, D2D_MATRIX_3X2_F maskTransform, float opacity, ID2D1Brush* opacityBrush, D2D1_LAYER_OPTIONS layerOptions)
+        public D2D1_LAYER_PARAMETERS([NativeTypeName("const D2D1_RECT_F")] in D2D_RECT_F contentBounds, [NativeTypeName("ID2D1Geometry *"), Optional] ID2D1Geometry* geometricMask, [Optional] D2D1_ANTIALIAS_MODE maskAntialiasMode, [NativeTypeName("D2D1_MATRIX_3X2_F")] D2D_MATRIX_3X2_F maskTransform, [NativeTypeName("FLOAT")] float opacity = 1.0f, [NativeTypeName("ID2D1Brush *")] ID2D1Brush* opacityBrush = null, D2D1_LAYER_OPTIONS layerOptions = D2D1_LAYER_OPTIONS_NONE)
         {
-            this.contentBounds = contentBounds;
-            this.geometricMask = geometricMask;
-            this.maskAntialiasMode = maskAntialiasMode;
-            this.maskTransform = maskTransform;
-            this.opacity = opacity;
-            this.opacityBrush = opacityBrush;
-            this.layerOptions = layerOptions;
+            this = LayerParameters(contentBounds, geometricMask, maskAntialiasMode, maskTransform, opacity, opacityBrush, layerOptions);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES.Manual.cs

@@ -3,14 +3,15 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES
     {
-        public D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES(in D2D_POINT_2F startPoint, in D2D_POINT_2F endPoint)
+        public D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES([NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F startPoint, [NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F endPoint)
         {
-            this.startPoint = startPoint;
-            this.endPoint = endPoint;
+            this = LinearGradientBrushProperties(startPoint, endPoint);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_QUADRATIC_BEZIER_SEGMENT.Manual.cs

@@ -3,14 +3,15 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_QUADRATIC_BEZIER_SEGMENT
     {
-        public D2D1_QUADRATIC_BEZIER_SEGMENT(in D2D_POINT_2F point1, in D2D_POINT_2F point2)
+        public D2D1_QUADRATIC_BEZIER_SEGMENT([NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F point1, [NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F point2)
         {
-            this.point1 = point1;
-            this.point2 = point2;
+            this = QuadraticBezierSegment(point1, point2);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_RADIAL_GRADIENT_BRUSH_PROPERTIES.Manual.cs

@@ -3,16 +3,15 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_RADIAL_GRADIENT_BRUSH_PROPERTIES
     {
-        public D2D1_RADIAL_GRADIENT_BRUSH_PROPERTIES(in D2D_POINT_2F center, in D2D_POINT_2F gradientOriginOffset, float radiusX, float radiusY)
+        public D2D1_RADIAL_GRADIENT_BRUSH_PROPERTIES([NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F center, [NativeTypeName("const D2D1_POINT_2F &")] in D2D_POINT_2F gradientOriginOffset, [NativeTypeName("FLOAT")] float radiusX, [NativeTypeName("FLOAT")] float radiusY)
         {
-            this.center = center;
-            this.gradientOriginOffset = gradientOriginOffset;
-            this.radiusX = radiusX;
-            this.radiusY = radiusY;
+            this = RadialGradientBrushProperties(center, gradientOriginOffset, radiusX, radiusY);
         }
     }
 }

sources/Interop/D2D1/um/d2d1/D2D1_RENDER_TARGET_PROPERTIES.Manual.cs

@@ -3,20 +3,20 @@
 // Ported from um/d2d1helper.h in the Windows SDK for Windows 10.0.18362.0
 // Original source is Copyright © Microsoft. All rights reserved.
 
+using static TerraFX.Interop.D2D1;
+using static TerraFX.Interop.D2D1_FEATURE_LEVEL;
+using static TerraFX.Interop.D2D1_RENDER_TARGET_TYPE;
+using static TerraFX.Interop.D2D1_RENDER_TARGET_USAGE;
+
 namespace TerraFX.Interop
 {
     public partial struct D2D1_RENDER_TARGET_PROPERTIES
     {
-        public static readonly D2D1_RENDER_TARGET_PROPERTIES DEFAULT = new D2D1_RENDER_TARGET_PROPERTIES(D2D1_RENDER_TARGET_TYPE.D2D1_RENDER_TARGET_TYPE_DEFAULT, D2D1_PIXEL_FORMAT.DEFAULT, 0.0f, 0.0f, D2D1_RENDER_TARGET_USAGE.D2D1_RENDER_TARGET_USAGE_NONE, D2D1_FEATURE_LEVEL.D2D1_FEATURE_LEVEL_DEFAULT);
+        public static readonly D2D1_RENDER_TARGET_PROPERTIES DEFAULT = new D2D1_RENDER_TARGET_PROPERTIES(D2D1_RENDER_TARGET_TYPE_DEFAULT, default, 0.0f, 0.0f, D2D1_RENDER_TARGET_USAGE_NONE, D2D1_FEATURE_LEVEL_DEFAULT);
 
-        public D2D1_RENDER_TARGET_PROPERTIES(D2D1_RENDER_TARGET_TYPE type, D2D1_PIXEL_FORMAT pixelFormat, float dpiX, float dpiY, D2D1_RENDER_TARGET_USAGE usage, D2D1_FEATURE_LEVEL minLevel)
+        public D2D1_RENDER_TARGET_PROPERTIES(D2D1_RENDER_TARGET_TYPE type = D2D1_RENDER_TARGET_TYPE_DEFAULT, [NativeTypeName("const D2D1_PIXEL_FORMAT &")] in D2D1_PIXEL_FORMAT pixelFormat = default, [NativeTypeName("FLOAT")] float dpiX = 0.0f, [NativeTypeName("FLOAT")] float dpiY = 0.0f, D2D1_RENDER_TARGET_USAGE usage = D2D1_RENDER_TARGET_USAGE_NONE, D2D1_FEATURE_LEVEL minLevel = D2D1_FEATURE_LEVEL_DEFAULT)
         {
-            this.type = type;
-            this.pixelFormat = pixelFormat;
-            this.dpiX = dpiX;
-            this.dpiY = dpiY;
-            this.usage = usage;
-            this.minLevel = minLevel;
+            this = RenderTargetProperties(type, pixelFormat, dpiX, dpiY, usage, minLevel);
         }
     }
 }