Wrapping native gdi32.dll calls in a wrapper class

4 files changed, 64 insertions, 18 deletions

diff --git a/GdiTest/BitBltDrawingArea.cs b/GdiTest/BitBltDrawingArea.cs
index a5b8dab..3e7c4ec 100644
--- a/GdiTest/BitBltDrawingArea.cs
+++ b/GdiTest/BitBltDrawingArea.cs
@@ -2,26 +2,11 @@ using Gtk;
 using Cairo;
 using System;
 using System.Drawing;
-using System.Runtime.InteropServices;
 
 namespace GdiTest
 {
 	public class BitBltDrawingArea : DrawingArea
-	{
-		[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
-		
-		private static extern int BitBlt(
-		                                 IntPtr hdcDest,
-		                                 int nXDest,
-		                                 int nYDest,
-		                                 int nWidth,
-		                                 int nHeight,
-		                                 IntPtr hdcSrc,
-		                                 int nXSrc,
-		                                 int nYSrc,
-		                                 System.Int32 dwRop
-		                                 );
-		
+	{		
 		public BitBltDrawingArea ()
 		{
 		}
@@ -47,11 +32,11 @@ namespace GdiTest
 				cg.MoveTo (10, 10);
 				cg.LineTo (110, 110);
 				cg.Stroke ();
-				
+
 				System.Drawing.Graphics wg = Gtk.DotNet.Graphics.FromDrawable(this.GdkWindow, true);
 				IntPtr dc = wg.GetHdc();
 				
-				BitBlt(dc, 70, 0, 60, 60, dc, 0, 0, 0xCC0020);
+				Gdi32._BitBlt(dc, 70, 0, 60, 60, dc, 0, 0, 0xCC0020);
 			}
 			return true;
 		}
diff --git a/GdiTest/Gdi32.cs b/GdiTest/Gdi32.cs
new file mode 100644
index 0000000..74d822d
--- /dev/null
+++ b/GdiTest/Gdi32.cs
@@ -0,0 +1,59 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace GdiTest
+{
+	public class Gdi32
+	{		
+		[DllImport("gdi32.dll")]
+		
+		private static extern int BitBlt(
+		                                 IntPtr hdcDest,
+		                                 int nXDest,
+		                                 int nYDest,
+		                                 int nWidth,
+		                                 int nHeight,
+		                                 IntPtr hdcSrc,
+		                                 int nXSrc,
+		                                 int nYSrc,
+		                                 System.Int32 dwRop
+		                                 );
+		
+		static bool win32 = false;
+		
+		public Gdi32 ()
+		{
+		}
+		
+		public static void init()
+		{
+			int p = (int) Environment.OSVersion.Platform;
+			
+			if ((p == 4) || (p == 6) || (p == 128)) {
+				win32 = false;
+			} else {
+				win32 = true;
+			}
+		}
+		
+		public static void setWin32(bool pWin32)
+		{
+			win32 = pWin32;
+		}
+		
+		public static bool getWin32()
+		{
+			return win32;
+		}
+			
+		public static int _BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight,
+		                                 IntPtr hdcSrc, int nXSrc, int nYSrc, System.Int32 dwRop)
+		{
+			if (win32)
+				return BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, dwRop);
+			else
+				return -1;
+		}
+	}
+}
+
diff --git a/GdiTest/GdiTest.csproj b/GdiTest/GdiTest.csproj
index fda40e2..b92424e 100644
--- a/GdiTest/GdiTest.csproj
+++ b/GdiTest/GdiTest.csproj
@@ -57,6 +57,7 @@
     <Compile Include="AssemblyInfo.cs" />
     <Compile Include="LineDrawingArea.cs" />
     <Compile Include="BitBltDrawingArea.cs" />
+    <Compile Include="Gdi32.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/GdiTest/Main.cs b/GdiTest/Main.cs
index 7e1b01e..a72d184 100644
--- a/GdiTest/Main.cs
+++ b/GdiTest/Main.cs
@@ -8,6 +8,7 @@ namespace GdiTest
 	{
 		public static void Main (string[] args)
 		{
+			Gdi32.init();
 			Application.Init ();
 			MainWindow w = new MainWindow ();