Add support for converting Gdi+ bitmap to Direct2D bitmap

Add basic wraps to load a Gdi+ bitmap and a conversion method to RenderTarget to create a Direct2D bitmap.

Author: JeremyKuhne

src/samples/DirectDraw/ImagingDemo/Program.cs

@@ -7,6 +7,7 @@
 using Windows.Win32.Graphics.Direct2D;
 using Windows.Win32.Graphics.Imaging;
 using Bitmap = Windows.Win32.Graphics.Direct2D.Bitmap;
+using GdiPlusBitmap = Windows.Win32.Graphics.GdiPlus.Bitmap;
 
 namespace ImagingDemo;
 
@@ -19,6 +20,7 @@ private unsafe class ImagingDemo : MainWindow
     {
         private FormatConverter? _converter;
         private Bitmap? _bitmap;
+        private GdiPlusBitmap? _gdiPlusBitmap;
 
 
         public ImagingDemo() : base(
@@ -29,6 +31,7 @@ public ImagingDemo() : base(
         }
 
         [MemberNotNull(nameof(_converter))]
+        [MemberNotNull(nameof(_gdiPlusBitmap))]
         private void CreateBitmapFromFile(string fileName)
         {
             _converter?.Dispose();
@@ -37,16 +40,20 @@ private void CreateBitmapFromFile(string fileName)
             using BitmapDecoder decoder = new(fileName);
             using BitmapFrameDecode frame = decoder.GetFrame(0);
             _converter = new(frame);
+
+            _gdiPlusBitmap = new(fileName);
         }
 
         protected override void RenderTargetCreated()
         {
-            if (_converter is null)
+            if (_converter is null || _gdiPlusBitmap is null)
             {
                 CreateBitmapFromFile("Blue Marble 2012 Original.jpg");
             }
 
             _bitmap?.Dispose();
+
+            //_bitmap = RenderTarget.CreateBitmapFromGdiPlusBitmap(_gdiPlusBitmap);
             _bitmap = RenderTarget.CreateBitmapFromWicBitmap(_converter);
             base.RenderTargetCreated();
         }

src/thirtytwo/GlobalSuppressions.cs

@@ -12,5 +12,6 @@
 [assembly: SuppressMessage("Design", "CA1069:Enums values should not be duplicated", Justification = "Matches Windows", Scope = "type", Target = "~T:Windows.MessageBoxStyles")]
 [assembly: SuppressMessage("Design", "CA1069:Enums values should not be duplicated", Justification = "Matches Windows", Scope = "type", Target = "~T:Windows.WindowStyles")]
 [assembly: SuppressMessage("Design", "CA1069:Enums values should not be duplicated", Justification = "Matches Windows", Scope = "type", Target = "~T:Windows.VirtualKey")]
+[assembly: SuppressMessage("Design", "CA1069:Enums values should not be duplicated", Justification = "Matches Windows", Scope = "type", Target = "~T:Windows.Win32.Graphics.GdiPlus.PixelFormat")]
 [assembly: SuppressMessage("Usage", "CA2231:Overload operator equals on overriding value type Equals", Justification = "CsWin32", Scope = "type", Target = "~T:Windows.Win32.Foundation.PCWSTR")]
 [assembly: SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "Thread Local", Scope = "member", Target = "~F:Windows.WindowClass.t_initializeProcedure")]

src/thirtytwo/NativeMethods.txt

@@ -16,6 +16,7 @@ CLEARTYPE_NATURAL_QUALITY
 ClientToScreen
 CLIPBOARD_FORMAT
 CloseClipboard
+CLSID_WICImagingFactory2
 CoCreateInstance
 CoGetClassObject
 CombineRgn
@@ -93,15 +94,36 @@ FONT_WEIGHT
 FormatMessage
 FrameRect
 FVE_E_LOCKED_VOLUME
+GdipBitmapLockBits
+GdipBitmapUnlockBits
+GdipCreateBitmapFromDirectDrawSurface
+GdipCreateBitmapFromFile
+GdipCreateBitmapFromGdiDib
+GdipCreateBitmapFromGraphics
+GdipCreateBitmapFromHBITMAP
+GdipCreateBitmapFromHICON
+GdipCreateBitmapFromResource
+GdipCreateBitmapFromScan0
+GdipCreateBitmapFromStream
 GdipCreateFromHDC
+GdipCreateHBITMAPFromBitmap
+GdipCreateHICONFromBitmap
 GdipCreatePen1
 GdipCreateSolidFill
 GdipDeleteBrush
 GdipDeleteGraphics
 GdipDeletePen
+GdipDisposeImage
+GdipDrawImageRect
+GdipDrawImageRectRect
 GdipDrawLines
 GdipDrawLinesI
 GdipFillEllipse
+GdipGetImageBounds
+GdipGetImageFlags
+GdipGetImageGraphicsContext
+GdipGetImagePixelFormat
+GdipGetImageRawFormat
 GdiplusShutdown
 GdiplusStartup
 GdipSetSmoothingMode
@@ -168,6 +190,7 @@ GlobalFree
 GlobalLock
 GlobalSize
 GlobalUnlock
+GUID_WICPixelFormat32bppPBGRA
 HFONT
 HKEY_*
 HRESULT
@@ -194,6 +217,8 @@ IFileDialogCustomize
 IFileDialogEvents
 IFileOpenDialog
 IGlobalInterfaceTable
+ImageFlags
+ImageLockMode
 IMarshal
 IModalWindow
 InitCommonControlsEx
@@ -223,6 +248,7 @@ IsWindowEnabled
 IsWindowVisible
 IUIAutomationElement
 IUnknown
+IWICImagingFactory2
 KEY_INFORMATION_CLASS
 KEY_NAME_INFORMATION
 KF_*
@@ -262,6 +288,7 @@ OLEIVERB_*
 OpenClipboard
 PARAMDATA
 PeekMessage
+PixelFormat*
 PlaySound
 POINTS
 PolyBezier
@@ -281,8 +308,8 @@ RegQueryInfoKey
 RegQueryValueEx
 ReleaseCapture
 ReleaseDC
-RestoreDC
 RemoveClipboardFormatListener
+RestoreDC
 ROLE_SYSTEM_*
 RoundRect
 S_FALSE
@@ -362,7 +389,4 @@ VIRTUAL_KEY
 WIN32_ERROR
 WINDOWPOS
 WM_*
-XFORMCOORDS
-IWICImagingFactory2
-CLSID_WICImagingFactory2
-GUID_WICPixelFormat32bppPBGRA
+XFORMCOORDS

src/thirtytwo/Win32/Graphics/Direct2D/RenderTarget.cs

@@ -1,7 +1,11 @@
 // Copyright (c) Jeremy W. Kuhne. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
+using System.Drawing;
 using Windows.Support;
+using Windows.Win32.Graphics.Direct2D.Common;
+using Windows.Win32.Graphics.Dxgi.Common;
+using Windows.Win32.Graphics.Imaging;
 
 namespace Windows.Win32.Graphics.Direct2D;
 
@@ -13,5 +17,77 @@ public RenderTarget(ID2D1RenderTarget* renderTarget) : base((ID2D1Resource*)rend
     {
     }
 
+    /// <inheritdoc cref="ID2D1RenderTarget.CreateBitmapFromWicBitmap(IWICBitmapSource*, D2D1_BITMAP_PROPERTIES*, ID2D1Bitmap**)"/>
+    public Bitmap CreateBitmapFromWicBitmap<TBitmapSource>(
+        TBitmapSource wicBitmap)
+        where TBitmapSource : IPointer<IWICBitmapSource>
+    {
+        ID2D1Bitmap* d2dBitmap;
+        Pointer->CreateBitmapFromWicBitmap(
+            wicBitmap.Pointer,
+            bitmapProperties: (D2D1_BITMAP_PROPERTIES*)null,
+            &d2dBitmap).ThrowOnFailure();
+
+        Bitmap bitmap = new(d2dBitmap);
+        GC.KeepAlive(this);
+        GC.KeepAlive(wicBitmap);
+        return bitmap;
+    }
+
+    public Bitmap CreateBitmapFromGdiPlusBitmap(GdiPlus.Bitmap bitmap)
+    {
+        GdiPlus.PixelFormat pixelFormat = bitmap.PixelFormat;
+        RectangleF bounds = bitmap.Bounds;
+
+        const int BytesPerPixel = 4;
+
+        // We could let GDI+ do the buffer allocation, but for illustrative purposes I've done it here.
+        // Note that GDI+ always copies the data, even if it internally is in the desired format.
+        using BufferScope<byte> buffer = new((int)bounds.Width * (int)bounds.Height * BytesPerPixel);
+
+        fixed (byte* b = buffer)
+        {
+            GdiPlus.BitmapData bitmapData = new()
+            {
+                Width = (uint)bounds.Width,
+                Height = (uint)bounds.Height,
+                Stride = (int)bounds.Width * BytesPerPixel,
+                PixelFormat = (int)GdiPlus.PixelFormat.Format32bppArgb,
+                Scan0 = b
+            };
+
+            bitmap.LockBits(
+                new((int)bounds.X, (int)bounds.Y, (int)bounds.Width, (int)bounds.Height),
+                GdiPlus.ImageLockMode.ImageLockModeUserInputBuf | GdiPlus.ImageLockMode.ImageLockModeRead,
+                GdiPlus.PixelFormat.Format32bppArgb,
+                ref bitmapData);
+
+            D2D1_BITMAP_PROPERTIES bitmapProperties = new()
+            {
+                pixelFormat = new D2D1_PIXEL_FORMAT
+                {
+                    format = DXGI_FORMAT.DXGI_FORMAT_B8G8R8A8_UNORM,
+                    alphaMode = D2D1_ALPHA_MODE.D2D1_ALPHA_MODE_IGNORE
+                },
+                dpiX = 96,
+                dpiY = 96
+            };
+
+            ID2D1Bitmap* newBitmap;
+            HRESULT result = Pointer->CreateBitmap(
+                new((uint)bounds.Width, (uint)bounds.Height),
+                b,
+                (uint)bitmapData.Stride,
+                &bitmapProperties,
+                &newBitmap);
+
+            bitmap.UnlockBits(ref bitmapData);
+            result.ThrowOnFailure();
+
+            GC.KeepAlive(this);
+            return new Bitmap(newBitmap);
+        }
+    }
+
     public static implicit operator ID2D1RenderTarget*(RenderTarget renderTarget) => renderTarget.Pointer;
 }

src/thirtytwo/Win32/Graphics/Direct2D/RenderTargetExtensions.cs

@@ -117,25 +117,6 @@ public static void DrawTextLayout<TTarget, TLayout, TBrush>(
         GC.KeepAlive(defaultFillBrush);
     }
 
-    /// <inheritdoc cref="ID2D1RenderTarget.CreateBitmapFromWicBitmap(IWICBitmapSource*, D2D1_BITMAP_PROPERTIES*, ID2D1Bitmap**)"/>
-    public static Bitmap CreateBitmapFromWicBitmap<TRenderTarget, TBitmapSource>(
-        this TRenderTarget target,
-        TBitmapSource wicBitmap)
-        where TRenderTarget : IPointer<ID2D1RenderTarget>
-        where TBitmapSource : IPointer<IWICBitmapSource>
-    {
-        ID2D1Bitmap* d2dBitmap;
-        target.Pointer->CreateBitmapFromWicBitmap(
-            wicBitmap.Pointer,
-            bitmapProperties: (D2D1_BITMAP_PROPERTIES*)null,
-            &d2dBitmap).ThrowOnFailure();
-
-        Bitmap bitmap = new(d2dBitmap);
-        GC.KeepAlive(target);
-        GC.KeepAlive(wicBitmap);
-        return bitmap;
-    }
-
     public static void DrawBitmap<TRenderTarget, TBitmap>(
         this TRenderTarget target,
         TBitmap bitmap,

src/thirtytwo/Win32/Graphics/GdiPlus/Bitmap.cs

@@ -0,0 +1,61 @@
+// Copyright (c) Jeremy W. Kuhne. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.Drawing;
+using System.Runtime.CompilerServices;
+using Windows.Support;
+
+namespace Windows.Win32.Graphics.GdiPlus;
+
+public unsafe class Bitmap : Image, IPointer<GpBitmap>
+{
+    public unsafe new GpBitmap* Pointer => (GpBitmap*)base.Pointer;
+
+    public Bitmap(GpBitmap* bitmap) : base((GpImage*)bitmap) { }
+    public Bitmap(string filename) : this(Create(filename)) { }
+
+    private static GpBitmap* Create(string filename)
+    {
+        ArgumentNullException.ThrowIfNull(filename);
+        GdiPlus.Init();
+
+        fixed (char* fn = filename)
+        {
+            GpBitmap* bitmap;
+            Interop.GdipCreateBitmapFromFile(fn, &bitmap).ThrowIfFailed();
+            return bitmap;
+        }
+    }
+
+    /// <summary>
+    ///  Locks a rectangular portion of this bitmap and provides a temporary buffer that you can use to read or write
+    ///  pixel data in a specified format. Any pixel data that you write to the buffer is copied to the
+    ///  <see cref="Bitmap"/> object when you call <see cref="UnlockBits(ref BitmapData)"/>.
+    /// </summary>
+    /// <remarks>
+    ///  <para>
+    ///   <see href="https://learn.microsoft.com/windows/win32/api/gdiplusheaders/nf-gdiplusheaders-bitmap-lockbits">
+    ///   </see>
+    ///  </para>
+    /// </remarks>
+    public void LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format, ref BitmapData data)
+    {
+        // LockBits always creates a temporary copy of the data.
+        Interop.GdipBitmapLockBits(
+            Pointer,
+            (Rect*)&rect,
+            (uint)flags,
+            (int)format,
+            (BitmapData*)Unsafe.AsPointer(ref data)).ThrowIfFailed();
+
+        GC.KeepAlive(this);
+    }
+
+    public void UnlockBits(ref BitmapData data)
+    {
+        Interop.GdipBitmapUnlockBits(Pointer, (BitmapData*)Unsafe.AsPointer(ref data)).ThrowIfFailed();
+        GC.KeepAlive(this);
+    }
+
+    public static implicit operator GpBitmap*(Bitmap bitmap) => bitmap.Pointer;
+}