Moved xplat parts of IRenderManager to extension methods

src/Gtk/Perspex.Cairo/Media/Imaging/RenderTargetBitmapImpl.cs

@@ -3,6 +3,7 @@
 
 using System;
 using Perspex.Platform;
+using Perspex.Rendering;
 
 namespace Perspex.Cairo.Media.Imaging
 {

src/Gtk/Perspex.Cairo/Media/TileBrushes.cs

@@ -7,6 +7,7 @@ using Perspex.Cairo.Media.Imaging;
 using Perspex.Layout;
 using Perspex.Media;
 using Perspex.Platform;
+using Perspex.Rendering;
 
 namespace Perspex.Cairo.Media
 {

src/Gtk/Perspex.Cairo/Renderer.cs

@@ -15,7 +15,7 @@ namespace Perspex.Cairo
     /// <summary>
     /// A cairo renderer.
     /// </summary>
-    public class Renderer : RendererBase
+    public class Renderer : IRenderer
     {
         private readonly Surface _surface;
         private Gdk.Window _window;
@@ -40,7 +40,7 @@ namespace Perspex.Cairo
         /// </summary>
         /// <param name="width">The new width.</param>
         /// <param name="height">The new height.</param>
-        public override void Resize(int width, int height)
+        public  void Resize(int width, int height)
         {
             // Don't need to do anything here.
         }
@@ -51,7 +51,7 @@ namespace Perspex.Cairo
         /// </summary>
         /// <param name="handle">The platform-specific handle.</param>
         /// <returns>A surface wrapped in an <see cref="IDrawingContext"/>.</returns>
-        protected override IDrawingContext CreateDrawingContext(IPlatformHandle handle)
+        public IDrawingContext CreateDrawingContext(IPlatformHandle handle)
         {
             switch (handle.HandleDescriptor)
             {
@@ -68,11 +68,8 @@ namespace Perspex.Cairo
                         handle.HandleDescriptor));
             }
         }
-
-        [DllImport("user32.dll")]
-        private static extern IntPtr GetDC(IntPtr hwnd);
-
-        public override void Dispose()
+        
+        public void Dispose()
         {
 			if (_surface != null)
 		        _surface.Dispose();

src/Perspex.SceneGraph/Platform/IRenderer.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT license. See licence.md file in the project root for full license information.
 
 using System;
+using Perspex.Media;
 
 namespace Perspex.Platform
 {
@@ -17,16 +18,11 @@ namespace Perspex.Platform
     public interface IRenderer : IDisposable
     {
         /// <summary>
-        /// Gets the number of times <see cref="Render"/> has been called.
+        /// Creates an <see cref="IDrawingContext"/> for a rendering session.
         /// </summary>
-        int RenderCount { get; }
-
-        /// <summary>
-        /// Renders the specified visual.
-        /// </summary>
-        /// <param name="visual">The visual to render.</param>
-        /// <param name="handle">An optional platform-specific handle.</param>
-        void Render(IVisual visual, IPlatformHandle handle);
+        /// <param name="handle">The handle to use to create the context.</param>
+        /// <returns>An <see cref="IDrawingContext"/>.</returns>
+        IDrawingContext CreateDrawingContext(IPlatformHandle target);
 
         /// <summary>
         /// Resizes the rendered viewport.

src/Perspex.SceneGraph/Rendering/RendererBase.cs

@@ -14,61 +14,74 @@ namespace Perspex.Rendering
     /// <remarks>
     /// This class provides implements the platform-independent parts of <see cref="IRenderer"/>.
     /// </remarks>
-    public abstract class RendererBase : IRenderer
+    public static class RendererMixin
     {
         /// <summary>
-        /// Gets the number of times <see cref="Render(IVisual, IPlatformHandle)"/> has been called.
+        /// Renders the specified visual.
         /// </summary>
-        public int RenderCount
+        /// <param name="renderer">IRenderer instance</param>
+        /// <param name="visual">The visual to render.</param>
+        /// <param name="target">An optional platform-specific handle.</param>
+        public static void Render(this IRenderer renderer, IVisual visual, IPlatformHandle target)
         {
-            get;
-            private set;
+            using (var ctx = renderer.CreateDrawingContext(target))
+                ctx.Render(visual);
         }
 
-        public abstract void Dispose();
-
         /// <summary>
         /// Renders the specified visual.
         /// </summary>
+        /// <param name="renderer">IRenderer instance</param>
+        /// <param name="target">An optional platform-specific handle.</param>
         /// <param name="visual">The visual to render.</param>
-        /// <param name="handle">An optional platform-specific handle.</param>
-        public virtual void Render(IVisual visual, IPlatformHandle handle)
+        /// <param name="translation">The current translation.</param>
+        /// <param name="transform">The current transform.</param>
+        public static void Render(this IRenderer renderer, IVisual visual, IPlatformHandle target, Matrix translation, Matrix transform)
         {
-            Render(visual, handle, Matrix.Identity);
-            ++RenderCount;
+            using (var ctx = renderer.CreateDrawingContext(target))
+                ctx.Render(visual, translation, transform);
         }
 
         /// <summary>
         /// Renders the specified visual with the specified transform and clip.
         /// </summary>
+        /// <param name="renderer">IRenderer instance</param>
+        /// <param name="target">An optional platform-specific handle.</param>
         /// <param name="visual">The visual to render.</param>
-        /// <param name="handle">An optional platform-specific handle.</param>
         /// <param name="transform">The transform.</param>
         /// <param name="clip">An optional clip rectangle.</param>
-        public virtual void Render(IVisual visual, IPlatformHandle handle, Matrix transform, Rect? clip = null)
+        public static void Render(this IRenderer renderer, IVisual visual, IPlatformHandle target, Matrix transform, Rect? clip = null)
         {
-            using (var context = CreateDrawingContext(handle))
-            using (clip.HasValue ? context.PushClip(clip.Value) : null)
-            {
-                Render(visual, context, Matrix.Identity, transform);
-            }
+            using (var context = renderer.CreateDrawingContext(target))
+                context.Render(visual, transform, clip);
         }
 
         /// <summary>
-        /// Resizes the rendered viewport.
+        /// Renders the specified visual.
         /// </summary>
-        /// <param name="width">The new width.</param>
-        /// <param name="height">The new height.</param>
-        public abstract void Resize(int width, int height);
+        /// <param name="visual">The visual to render.</param>
+        /// 
+        /// <param name="context">The drawing context.</param>
+        public static void Render(this IDrawingContext context, IVisual visual)
+        {
+            context.Render(visual, Matrix.Identity);
+        }
 
         /// <summary>
-        /// When overriden by a derived class creates an <see cref="IDrawingContext"/> for a
-        /// rendering session.
+        /// Renders the specified visual with the specified transform and clip.
         /// </summary>
-        /// <param name="handle">The handle to use to create the context.</param>
-        /// <returns>An <see cref="IDrawingContext"/>.</returns>
-        protected abstract IDrawingContext CreateDrawingContext(IPlatformHandle handle);
-
+        /// <param name="visual">The visual to render.</param>
+        /// <param name="context">The drawing context.</param>
+        /// <param name="transform">The transform.</param>
+        /// <param name="clip">An optional clip rectangle.</param>
+        public static void Render(this IDrawingContext context, IVisual visual, Matrix transform, Rect? clip = null)
+        {
+            using (clip.HasValue ? context.PushClip(clip.Value) : null)
+            {
+                context.Render(visual, Matrix.Identity, transform);
+            }
+        }
+        
         /// <summary>
         /// Renders the specified visual.
         /// </summary>
@@ -76,7 +89,7 @@ namespace Perspex.Rendering
         /// <param name="context">The drawing context.</param>
         /// <param name="translation">The current translation.</param>
         /// <param name="transform">The current transform.</param>
-        protected virtual void Render(IVisual visual, IDrawingContext context, Matrix translation, Matrix transform)
+        public static void Render(this IDrawingContext context, IVisual visual, Matrix translation, Matrix transform)
         {
             var opacity = visual.Opacity;
 
@@ -108,7 +121,7 @@ namespace Perspex.Rendering
 
                     foreach (var child in visual.VisualChildren.OrderBy(x => x.ZIndex))
                     {
-                        Render(child, context, translation, transform);
+                        context.Render(child, translation, transform);
                     }
                 }
             }

src/Windows/Perspex.Direct2D1/Media/Imaging/RenderTargetBitmapImpl.cs

@@ -3,6 +3,7 @@
 
 using System;
 using Perspex.Platform;
+using Perspex.Rendering;
 using SharpDX.Direct2D1;
 using SharpDX.WIC;
 

src/Windows/Perspex.Direct2D1/Media/VisualBrushImpl.cs

@@ -4,6 +4,7 @@
 using System;
 using Perspex.Layout;
 using Perspex.Media;
+using Perspex.Rendering;
 using SharpDX.Direct2D1;
 
 namespace Perspex.Direct2D1.Media

src/Windows/Perspex.Direct2D1/Renderer.cs

@@ -12,7 +12,7 @@ using DwFactory = SharpDX.DirectWrite.Factory;
 
 namespace Perspex.Direct2D1
 {
-    public class Renderer : RendererBase
+    public class Renderer : IRenderer
     {
         /// <summary>
         /// The render target.
@@ -77,7 +77,7 @@ namespace Perspex.Direct2D1
         /// </summary>
         /// <param name="width">The new width.</param>
         /// <param name="height">The new height.</param>
-        public override void Resize(int width, int height)
+        public void Resize(int width, int height)
         {
             WindowRenderTarget window = _renderTarget as WindowRenderTarget;
 
@@ -96,12 +96,12 @@ namespace Perspex.Direct2D1
         /// </summary>
         /// <param name="handle">The platform handle. Unused.</param>
         /// <returns>An <see cref="IDrawingContext"/>.</returns>
-        protected override IDrawingContext CreateDrawingContext(IPlatformHandle handle)
+        public IDrawingContext CreateDrawingContext(IPlatformHandle handle)
         {
             return new DrawingContext(_renderTarget, DirectWriteFactory);
         }
 
-        public override void Dispose()
+        public void Dispose()
         {
             _renderTarget.Dispose();
         }