Mono.Cairo: Add Region class for cairo_region_* API added in cairo 1.10

The Region type is needed for new API introduced by GDK 3.0.

This requires cairo 1.10 or above.

3 files changed, 254 insertions, 0 deletions

diff --git a/mcs/class/Mono.Cairo/Mono.Cairo.dll.sources b/mcs/class/Mono.Cairo/Mono.Cairo.dll.sources
index 648b557ca7b..880cdf2adc3 100644
--- a/mcs/class/Mono.Cairo/Mono.Cairo.dll.sources
+++ b/mcs/class/Mono.Cairo/Mono.Cairo.dll.sources
@@ -40,6 +40,7 @@
 ./Mono.Cairo/PSSurface.cs
 ./Mono.Cairo/RadialGradient.cs
 ./Mono.Cairo/Rectangle.cs
+./Mono.Cairo/Region.cs
 ./Mono.Cairo/ScaledFont.cs
 ./Mono.Cairo/SolidPattern.cs
 ./Mono.Cairo/Status.cs
diff --git a/mcs/class/Mono.Cairo/Mono.Cairo/NativeMethods.cs b/mcs/class/Mono.Cairo/Mono.Cairo/NativeMethods.cs
index 67e2051573d..c53f0009c00 100644
--- a/mcs/class/Mono.Cairo/Mono.Cairo/NativeMethods.cs
+++ b/mcs/class/Mono.Cairo/Mono.Cairo/NativeMethods.cs
@@ -483,6 +483,75 @@ namespace Cairo
 		internal static extern void cairo_reference (IntPtr cr);
 		
 		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern bool cairo_region_contains_point (IntPtr region, int x, int y);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern RegionOverlap cairo_region_contains_rectangle (IntPtr region, ref RectangleInt rectangle);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern IntPtr cairo_region_copy (IntPtr original);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern IntPtr cairo_region_create ();
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern IntPtr cairo_region_create_rectangle (ref RectangleInt rect);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern IntPtr cairo_region_create_rectangles (RectangleInt[] rects, int count);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern void cairo_region_destroy (IntPtr region);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern bool cairo_region_equal (IntPtr a, IntPtr b);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern void cairo_region_get_extents (IntPtr region, out RectangleInt extents);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern void cairo_region_get_rectangle (IntPtr region, int nth, out RectangleInt rectangle);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_intersect (IntPtr dst, IntPtr other);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_intersect_rectangle (IntPtr dst, ref RectangleInt rectangle);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern bool cairo_region_is_empty (IntPtr region);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern int cairo_region_num_rectangles (IntPtr region);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern IntPtr cairo_region_reference (IntPtr region);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_status (IntPtr region);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_subtract (IntPtr dst, IntPtr other);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_subtract_rectangle (IntPtr dst, ref RectangleInt rectangle);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern void cairo_region_translate (IntPtr region, int dx, int dy);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_union (IntPtr dst, IntPtr other);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_union_rectangle (IntPtr dst, ref RectangleInt rectangle);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_xor (IntPtr dst, IntPtr other);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
+		internal static extern Status cairo_region_xor_rectangle (IntPtr dst, ref RectangleInt rectangle);
+
+		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
 		internal static extern void cairo_rel_curve_to (IntPtr cr, double dx1, double dy1, double dx2, double dy2, double dx3, double dy3);
 		
 		[DllImport (cairo, CallingConvention=CallingConvention.Cdecl)]
diff --git a/mcs/class/Mono.Cairo/Mono.Cairo/Region.cs b/mcs/class/Mono.Cairo/Mono.Cairo/Region.cs
new file mode 100644
index 00000000000..e3b3eb1f83c
--- /dev/null
+++ b/mcs/class/Mono.Cairo/Mono.Cairo/Region.cs
@@ -0,0 +1,184 @@
+// Copyright (C) 2011 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace Cairo
+{
+
+	[StructLayout(LayoutKind.Sequential)]
+	public struct RectangleInt {
+		public int X;
+		public int Y;
+		public int Width;
+		public int Height;
+	}
+
+	public enum RegionOverlap {
+		In,
+		Out,
+		Part,
+	}
+
+	public class Region : IDisposable {
+
+		IntPtr handle;
+		public IntPtr Handle {
+			get { return handle; }
+		}
+
+		~Region ()
+		{
+			Console.WriteLine ("Cairo.Region finalizer reached - developer must dispose regions manually to avoid leakage due to thread-safety concerns.");
+		}
+
+		public Region (IntPtr handle) : this (handle, false) {}
+
+		public Region (IntPtr handle, bool owned)
+		{
+			this.handle = handle;
+			if (!owned)
+				NativeMethods.cairo_region_reference (handle);
+		}
+
+		public Region ()
+		{
+			handle = NativeMethods.cairo_region_create ();
+		}
+
+		public Region (RectangleInt rect)
+		{
+			handle = NativeMethods.cairo_region_create_rectangle (ref rect);
+		}
+
+		public Region (RectangleInt[] rects)
+		{
+			handle = NativeMethods.cairo_region_create_rectangles (rects, rects.Length);
+		}
+
+		public Region Copy ()
+		{
+			return new Region (NativeMethods.cairo_region_copy (Handle), true);
+		}
+
+		public void Dispose ()
+		{
+			if (handle != IntPtr.Zero)
+				NativeMethods.cairo_region_destroy (Handle);
+			handle = IntPtr.Zero;
+			GC.SuppressFinalize (this);
+		}
+
+		public override bool Equals (object obj)
+		{
+			return (obj is Region) && NativeMethods.cairo_region_equal (Handle, (obj as Region).Handle);
+		}
+
+		public override int GetHashCode ()
+		{
+			return Handle.GetHashCode ();
+		}
+
+		public Status Status {
+			get { return NativeMethods.cairo_region_status (Handle); }
+		}
+
+		public RectangleInt Extents {
+			get {
+				RectangleInt result;
+				NativeMethods.cairo_region_get_extents (Handle, out result);
+				return result;
+			}
+		}
+
+		public int NumRectangles {
+			get { return NativeMethods.cairo_region_num_rectangles (Handle); }
+		}
+
+		public RectangleInt GetRectangle (int nth)
+		{
+			RectangleInt val;
+			NativeMethods.cairo_region_get_rectangle (Handle, nth, out val);
+			return val;
+		}
+
+		public bool IsEmpty {
+			get { return NativeMethods.cairo_region_is_empty (Handle); }
+		}
+
+		public RegionOverlap ContainsPoint (RectangleInt rectangle)
+		{
+			return NativeMethods.cairo_region_contains_rectangle (Handle, ref rectangle);
+		}
+
+		public bool ContainsPoint (int x, int y)
+		{
+			return NativeMethods.cairo_region_contains_point (Handle, x, y);
+		}
+
+		public void Translate (int dx, int dy)
+		{
+			NativeMethods.cairo_region_translate (Handle, dx, dy);
+		}
+
+		public Status Subtract (Region other)
+		{
+			return NativeMethods.cairo_region_subtract (Handle, other.Handle);
+		}
+
+		public Status SubtractRectangle (RectangleInt rectangle)
+		{
+			return NativeMethods.cairo_region_subtract_rectangle (Handle, ref rectangle);
+		}
+
+		public Status Intersect (Region other)
+		{
+			return NativeMethods.cairo_region_intersect (Handle, other.Handle);
+		}
+
+		public Status IntersectRectangle (RectangleInt rectangle)
+		{
+			return NativeMethods.cairo_region_intersect_rectangle (Handle, ref rectangle);
+		}
+
+		public Status Union (Region other)
+		{
+			return NativeMethods.cairo_region_union (Handle, other.Handle);
+		}
+
+		public Status UnionRectangle (RectangleInt rectangle)
+		{
+			return NativeMethods.cairo_region_union_rectangle (Handle, ref rectangle);
+		}
+
+		public Status Xor (Region other)
+		{
+			return NativeMethods.cairo_region_xor (Handle, other.Handle);
+		}
+
+		public Status XorRectangle (RectangleInt rectangle)
+		{
+			return NativeMethods.cairo_region_xor_rectangle (Handle, ref rectangle);
+		}
+	}
+}