Added an Mac OS OpenGL sample

build.cake

@@ -868,6 +868,10 @@ Task ("samples")
             c.Configuration = "Release"; 
             c.Properties ["Platform"] = new [] { "iPhoneSimulator" };
         });
+        RunNuGetRestore ("./samples/Skia.OSX.GLDemo/Skia.OSX.GLDemo.sln");
+        DotNetBuild ("./samples/Skia.OSX.GLDemo/Skia.OSX.GLDemo.sln", c => { 
+            c.Configuration = "Release"; 
+        });
     }
 
     if (IsRunningOnWindows ()) {
@@ -884,19 +888,18 @@ Task ("samples")
         DotNetBuild ("./samples/Skia.Forms.Demo/Skia.Forms.Demo.Windows.sln", c => { 
             c.Configuration = "Release"; 
         });
+        RunNuGetRestore ("./samples/Skia.WindowsDesktop.GLDemo/Skia.WindowsDesktop.GLDemo.sln");
+        DotNetBuild ("./samples/Skia.WindowsDesktop.GLDemo/Skia.WindowsDesktop.GLDemo.sln", c => { 
+            c.Configuration = "Release"; 
+            c.Properties ["Platform"] = new [] { "x86" };
+        });
     }
 
     RunNuGetRestore ("./samples/Skia.WindowsDesktop.Demo/Skia.WindowsDesktop.Demo.sln");
     DotNetBuild ("./samples/Skia.WindowsDesktop.Demo/Skia.WindowsDesktop.Demo.sln", c => { 
         c.Configuration = "Release"; 
         c.Properties ["Platform"] = new [] { "x86" };
     });
-
-    RunNuGetRestore ("./samples/Skia.WindowsDesktop.GLDemo/Skia.WindowsDesktop.GLDemo.sln");
-    DotNetBuild ("./samples/Skia.WindowsDesktop.GLDemo/Skia.WindowsDesktop.GLDemo.sln", c => { 
-        c.Configuration = "Release"; 
-        c.Properties ["Platform"] = new [] { "x86" };
-    });
 });
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////

samples/Skia.OSX.GLDemo/AppDelegate.cs

@@ -0,0 +1,29 @@
+using AppKit;
+using Foundation;
+
+namespace Skia.OSX.Demo
+{
+	[Register ("AppDelegate")]
+	public partial class AppDelegate : NSApplicationDelegate
+	{
+		public AppDelegate ()
+		{
+		}
+
+		public override void DidFinishLaunching (NSNotification notification)
+		{
+			// Insert code here to initialize your application
+		}
+
+		public override void WillTerminate (NSNotification notification)
+		{
+			// Insert code here to tear down your application
+		}
+
+		public override bool ApplicationShouldTerminateAfterLastWindowClosed (NSApplication sender)
+		{
+			return true;
+		}
+	}
+}
+

samples/Skia.OSX.GLDemo/Info.plist

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleName</key>
+	<string>Skia.OSX.Demo</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.xamarin.skia-osx-demo</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>10.10</string>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>billholmes</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+	<key>NSMainStoryboardFile</key>
+	<string>Main</string>
+	<key>XSAppIconAssets</key>
+	<string>Resources/Images.xcassets/AppIcons.appiconset</string>
+
+</dict>
+</plist>

samples/Skia.OSX.GLDemo/Main.cs

@@ -0,0 +1,13 @@
+using AppKit;
+
+namespace Skia.OSX.Demo
+{
+	static class MainClass
+	{
+		static void Main (string[] args)
+		{
+			NSApplication.Init ();
+			NSApplication.Main (args);
+		}
+	}
+}

samples/Skia.OSX.GLDemo/Main.storyboard

@@ -0,0 +1,107 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="10116" systemVersion="15E65" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="10116"/>
+    </dependencies>
+    <scenes>
+        <!--Application-->
+        <scene sceneID="JPo-4y-FX3">
+            <objects>
+                <application id="hnw-xV-0zn" sceneMemberID="viewController">
+                    <menu key="mainMenu" title="Main Menu" systemMenu="main" id="AYu-sK-qS6">
+                        <items>
+                            <menuItem title="Skia.OSX.Demo" id="1Xt-HY-uBw">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Skia.OSX.Demo" systemMenu="apple" id="uQy-DD-JDr">
+                                    <items>
+                                        <menuItem title="About Skia.OSX.Demo" id="5kV-Vb-QxS">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="orderFrontStandardAboutPanel:" target="Ady-hI-5gd" id="Exp-CZ-Vem"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem isSeparatorItem="YES" id="eHP-pT-vMg"/>
+                                        <menuItem title="Quit Skia.OSX.Demo" keyEquivalent="q" id="4sb-4s-VLi">
+                                            <connections>
+                                                <action selector="terminate:" target="Ady-hI-5gd" id="Te7-pn-YzF"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                        </items>
+                    </menu>
+                    <connections>
+                        <outlet property="delegate" destination="Voe-Tx-rLC" id="PrD-fu-P6m"/>
+                    </connections>
+                </application>
+                <customObject id="Voe-Tx-rLC" customClass="AppDelegate"/>
+                <customObject id="Ady-hI-5gd" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="75" y="0.0"/>
+        </scene>
+        <!--Window Controller-->
+        <scene sceneID="R2V-B0-nI4">
+            <objects>
+                <windowController id="B8D-0N-5wS" sceneMemberID="viewController">
+                    <window key="window" title="Window" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" oneShot="NO" releasedWhenClosed="NO" showsToolbarButton="NO" visibleAtLaunch="NO" animationBehavior="default" id="IQv-IB-iLA">
+                        <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
+                        <windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
+                        <rect key="contentRect" x="196" y="240" width="480" height="270"/>
+                        <rect key="screenRect" x="0.0" y="0.0" width="1680" height="1027"/>
+                    </window>
+                    <connections>
+                        <segue destination="XfG-lQ-9wD" kind="relationship" relationship="window.shadowedContentViewController" id="cq2-FE-JQM"/>
+                    </connections>
+                </windowController>
+                <customObject id="Oky-zY-oP4" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="75" y="250"/>
+        </scene>
+        <!--View Controller-->
+        <scene sceneID="hIz-AP-VOD">
+            <objects>
+                <viewController id="XfG-lQ-9wD" customClass="ViewController" sceneMemberID="viewController">
+                    <customView key="view" id="QUA-QF-Q3f">
+                        <rect key="frame" x="0.0" y="0.0" width="450" height="300"/>
+                        <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                        <subviews>
+                            <view translatesAutoresizingMaskIntoConstraints="NO" id="m2S-Jp-Qdl" customClass="SkiaView">
+                                <rect key="frame" x="0.0" y="0.0" width="450" height="300"/>
+                            </view>
+                            <popUpButton verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="mnJ-8z-WRI">
+                                <rect key="frame" x="228" y="17" width="205" height="26"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="200" id="3Ya-mE-NFc"/>
+                                    <constraint firstAttribute="height" constant="21" id="PW1-2o-QII"/>
+                                </constraints>
+                                <popUpButtonCell key="cell" type="push" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" id="5te-c2-WKW">
+                                    <behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
+                                    <font key="font" metaFont="menu"/>
+                                    <menu key="menu" id="LKv-bG-q8C"/>
+                                </popUpButtonCell>
+                                <connections>
+                                    <action selector="PopUpButtonAction:" target="XfG-lQ-9wD" id="lmM-6c-sIb"/>
+                                </connections>
+                            </popUpButton>
+                        </subviews>
+                        <constraints>
+                            <constraint firstAttribute="bottom" secondItem="mnJ-8z-WRI" secondAttribute="bottom" constant="20" id="A3L-Bb-rlF"/>
+                            <constraint firstAttribute="trailing" secondItem="mnJ-8z-WRI" secondAttribute="trailing" constant="20" id="DYI-UX-Zkb"/>
+                            <constraint firstAttribute="bottom" secondItem="m2S-Jp-Qdl" secondAttribute="bottom" id="Gw9-r7-0Df"/>
+                            <constraint firstItem="m2S-Jp-Qdl" firstAttribute="top" secondItem="QUA-QF-Q3f" secondAttribute="top" id="Uut-tC-oBU"/>
+                            <constraint firstItem="m2S-Jp-Qdl" firstAttribute="leading" secondItem="QUA-QF-Q3f" secondAttribute="leading" id="Xcr-Wg-5ia"/>
+                            <constraint firstAttribute="trailing" secondItem="m2S-Jp-Qdl" secondAttribute="trailing" id="rZp-9d-Lpb"/>
+                        </constraints>
+                    </customView>
+                    <connections>
+                        <outlet property="PopUpButton" destination="mnJ-8z-WRI" id="mEQ-lK-fod"/>
+                        <outlet property="SkiaView" destination="m2S-Jp-Qdl" id="8ta-WW-AHG"/>
+                    </connections>
+                </viewController>
+                <customObject id="rPt-NT-nkU" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="75" y="655"/>
+        </scene>
+    </scenes>
+</document>