[Mono-winforms-list] Initial MacOS/Quartz patches

[kangaroo]

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Heres the first in the patchset for MacOS/Quartz support;

this set is relatively simple; we add a FromHwndWithSize call to 
graphics (we need to pass width and height for quartz) for mac only 
calls; we check for an environment variable 
(MONO_MWF_USE_QUARTZ_BACKEND) to see if we're going to use 
XplatUIOSX.cs (this will be fine going forward cause we can set that in 
the bundlemaker script)

umm; and it adds the call into the libgdiplus land

libgdiplus patches to follow soon; they're a little more difficult due 
to X11/Quartz conflicting definitions (Point/Rect/Etc); I should be 
able to make them play nice tho by just avoiding some of the explicity 
casting in quartz that isn't really needed.

Ok to commit?

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Index: System.Drawing/System.Drawing/gdipFunctions.cs
===================================================================
--- System.Drawing/System.Drawing/gdipFunctions.cs	(revision 37350)
+++ System.Drawing/System.Drawing/gdipFunctions.cs	(working copy)
@@ -1601,6 +1601,10 @@
 
 		}
 		
+		/* Mac only function calls */
+		[DllImport("gdiplus.dll")]
+		internal static extern Status GdipCreateFromQuartz_macosx (IntPtr cgref, int width, int height, out IntPtr graphics);
+
 		/* Linux only function calls*/
 		[DllImport("gdiplus.dll")]
 		internal static extern Status GdipSetVisibleClip_linux (IntPtr graphics, ref Rectangle rect);
Index: System.Drawing/System.Drawing/Graphics.cs
===================================================================
--- System.Drawing/System.Drawing/Graphics.cs	(revision 37350)
+++ System.Drawing/System.Drawing/Graphics.cs	(working copy)
@@ -1253,6 +1253,13 @@
 			return null;
 		}
 
+		public static Graphics FromHwndWithSize (IntPtr hwnd, int width, int height) {
+			IntPtr graphics;
+			Status s = GDIPlus.GdipCreateFromQuartz_macosx (hwnd, width, height, out graphics);
+			GDIPlus.CheckStatus (s);
+			return new Graphics (graphics);
+		}
+
 		[EditorBrowsable (EditorBrowsableState.Advanced)]		
 		public static Graphics FromHwnd (IntPtr hwnd)
 		{
@@ -1264,6 +1271,7 @@
 				}
 
 				return FromXDrawable (hwnd, display);
+
 			}
 
 			Status status = GDIPlus.GdipCreateFromHWND (hwnd, out graphics);
Index: Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs
===================================================================
--- Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs	(revision 37359)
+++ Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs	(working copy)
@@ -183,7 +183,10 @@
 			default_class_name="SWFClass";
 
 			if (Environment.OSVersion.Platform == (PlatformID)128) {
-				driver=XplatUIX11.GetInstance();
+				if (Environment.GetEnvironmentVariable ("MONO_MWF_USE_QUARTZ_BACKEND") != null)
+					driver=XplatUIOSX.GetInstance();
+				else
+					driver=XplatUIX11.GetInstance();
 			} else {
 				driver=XplatUIWin32.GetInstance();
 			}
Index: Managed.Windows.Forms/System.Windows.Forms.dll.sources
===================================================================
--- Managed.Windows.Forms/System.Windows.Forms.dll.sources	(revision 37350)
+++ Managed.Windows.Forms/System.Windows.Forms.dll.sources	(working copy)
@@ -233,3 +233,4 @@
 System.Windows.Forms/XplatUIStructs.cs
 System.Windows.Forms/XplatUIWin32.cs
 System.Windows.Forms/XplatUIX11.cs
+System.Windows.Forms/XplatUIOSX.cs

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-kangaroo

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