[coreimage] Add generator support for CIVector[] and enable it in CIMeshGenerator. Fix #4226 (#4715)

src/coreimage.cs

@@ -5569,9 +5569,8 @@ namespace CoreImage {
 	[Mac (10,14, onlyOn64: true)]
 	[BaseType (typeof (CIFilter))]
 	interface CIMeshGenerator {
-		// https://github.com/xamarin/xamarin-macios/issues/4226
-		//[CoreImageFilterProperty ("inputMesh")]
-		//CIVector [] Mesh { get; set; }
+		[CoreImageFilterProperty ("inputMesh")]
+		CIVector [] Mesh { get; set; }
 		[CoreImageFilterProperty ("inputWidth")]
 		float Width { get; set; }
 		[CoreImageFilterProperty ("inputColor")]

src/generator-filters.cs

@@ -199,6 +199,10 @@ public partial class Generator {
 			// NSString should not be added - it should be bound as a string
 			print ("return (string) (ValueForKey (\"{0}\") as NSString);", propertyName);
 			break;
+		case "CIVector[]":
+			print ($"var handle = GetHandle (\"{propertyName}\");");
+			print ("return NSArray.ArrayFromHandle<CIVector> (handle);");
+			break;
 		default:
 			throw new BindingException (1018, true, "Unimplemented CoreImage property type {0}", propertyType);
 		}
@@ -247,6 +251,20 @@ public partial class Generator {
 			print ("SetValue (\"{0}\", ns);", propertyName);
 			indent--;
 			break;
+		case "CIVector[]":
+			print ("if (value == null) {");
+			indent++;
+			print ($"SetHandle (\"{propertyName}\", IntPtr.Zero);");
+			indent--;
+			print ("} else {");
+			indent++;
+			print ("using (var array = NSArray.FromNSObjects (value))");
+			indent++;
+			print ($"SetHandle (\"{propertyName}\", array.GetHandle ());");
+			indent--;
+			indent--;
+			print ("}");
+			break;
 		default:
 			throw new BindingException (1018, true, "Unimplemented CoreImage property type {0}", propertyType);
 		}

tests/monotouch-test/CoreImage/FilterTest.cs

@@ -153,6 +153,20 @@ namespace MonoTouchFixtures.CoreImage {
 				}
 			}
 		}
+
+		[Test]
+		public void CIVectorArray ()
+		{
+			TestRuntime.AssertXcodeVersion (10, 0);
+
+			using (var f = new CIMeshGenerator ()) {
+				Assert.Null (f.Mesh, "Mesh/Null");
+				f.Mesh = new CIVector [1] { new CIVector (1) };
+				Assert.That (f.Mesh.Length, Is.EqualTo (1), "Mesh/Non-null");
+				f.Mesh = null;
+				Assert.Null (f.Mesh, "Mesh/Null/again");
+			}
+		}
 	}
 }