Replaced PushTransform by PushPreTransform and PushPostTransform

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

@@ -113,7 +113,7 @@ namespace Perspex.Cairo.Media
                     out drawRect);
 
                 using (ctx.PushClip(drawRect))
-                using (ctx.PushTransform(transform))
+                using (ctx.PushPostTransform(transform))
                 {
                     ctx.Render(visual);
                 }

src/Perspex.Application/Application.cs

@@ -177,7 +177,7 @@ namespace Perspex
         /// <param name="platformID">The value of Environment.OSVersion.Platform.</param>
         protected void InitializeSubsystems(int platformID)
         {
-            if (true)//platformID == 4 || platformID == 6)
+            if (platformID == 4 || platformID == 6)
             {
                 InitializeSubsystem("Perspex.Cairo");
                 InitializeSubsystem("Perspex.Gtk");

src/Perspex.SceneGraph/Media/DrawingContext.cs

@@ -147,10 +147,14 @@ namespace Perspex.Media
         /// </summary>
         /// <param name="matrix">The matrix</param>
         /// <returns>A disposable used to undo the transformation.</returns>
-        public PushedState PushTransform(Matrix matrix)
+        public PushedState PushPostTransform(Matrix matrix) => PushSetTransform(CurrentTransform*matrix);
+
+        public PushedState PushPreTransform(Matrix matrix) => PushSetTransform(matrix*CurrentTransform);
+        
+
+        PushedState PushSetTransform(Matrix matrix)
         {
             var oldMatrix = CurrentTransform;
-            matrix = oldMatrix*matrix;
             _impl.Transform = matrix;
             return new PushedState(this, PushedState.PushedStateType.Matrix, oldMatrix);
         }

src/Perspex.SceneGraph/Rendering/RendererBase.cs

@@ -50,9 +50,10 @@ namespace Perspex.Rendering
                     var offset = Matrix.CreateTranslation(origin);
                     renderTransform = (-offset)*visual.RenderTransform.Value*(offset);
                 }
-                m = context.CurrentTransform.Invert()*renderTransform*m*context.CurrentTransform;
+                m = renderTransform*m;
 
-                using (context.PushTransform(m))
+
+                using (context.PushPreTransform(m))
                 using (context.PushOpacity(opacity))
                 using (visual.ClipToBounds ? context.PushClip(new Rect(visual.Bounds.Size)) : default(DrawingContext.PushedState))
                 {

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

@@ -55,7 +55,7 @@ namespace Perspex.Direct2D1.Media
 
                 using (var ctx = renderer.CreateDrawingContext())
                 using (ctx.PushClip(drawRect))
-                using (ctx.PushTransform(transform))
+                using (ctx.PushPostTransform(transform))
                 {
                     ctx.Render(visual);
                 }