Fix building for Stride

Author: dima.am

src/Myra/Graphics2D/RenderContext.cs

@@ -47,8 +47,6 @@ public partial class RenderContext : IDisposable
             FilterMode = TextureFilterMode.Default
         };
 
-        private bool IsAnisotropicFilteringOn = false;
-
         private static RasterizerState UIRasterizerState
 		{
 			get
@@ -121,6 +119,7 @@ internal Rectangle DeviceScissor
 			}
 		}
 
+        private bool _isAnisotropicFilteringOn;
 
 		public Rectangle Scissor
 		{
@@ -271,7 +270,7 @@ public void Draw(Texture2D texture, Rectangle destinationRectangle, Rectangle? s
 		/// <param name="depth"></param>
 		public void Draw(Texture2D texture, Vector2 position, Rectangle? sourceRectangle, Color color, float rotation, Vector2 scale, float depth = 0.0f)
 		{
-			SetTextureFiltering(IsAnisotropicFilteringOn ? TextureFiltering.Anisotropic : TextureFiltering.Nearest);
+			SetTextureFiltering(_isAnisotropicFilteringOn ? TextureFiltering.Anisotropic : TextureFiltering.Nearest);
 			color = CrossEngineStuff.MultiplyColor(color, Opacity);
 			scale *= Transform.Scale;
 			rotation += Transform.Rotation;
@@ -455,9 +454,8 @@ public void Begin()
 				UIRasterizerState,
 				null);
 #elif STRIDE
-			var samplerState = _textureFiltering == TextureFiltering.Nearest ?
-				MyraEnvironment.Game.GraphicsDevice.SamplerStates.PointClamp :
-				MyraEnvironment.Game.GraphicsDevice.SamplerStates.LinearClamp;
+			var samplerState = SelectedSamplerState();
+
 			_renderer.Begin(MyraEnvironment.Game.GraphicsContext,
 				SpriteSortMode.Deferred,
 				BlendStates.AlphaBlend,
@@ -471,6 +469,7 @@ public void Begin()
 			_beginCalled = true;
 		}
 
+#if MONOGAME || FNA
         private SamplerState SelectedSamplerState()
         {
             switch (_textureFiltering)
@@ -485,6 +484,22 @@ private SamplerState SelectedSamplerState()
                     throw new ArgumentOutOfRangeException();
             }
         }
+#elif STRIDE
+        private SamplerState SelectedSamplerState()
+        {
+            switch (_textureFiltering)
+            {
+                case TextureFiltering.Nearest:
+                    return MyraEnvironment.Game.GraphicsDevice.SamplerStates.PointClamp;
+                case TextureFiltering.Linear:
+                    return MyraEnvironment.Game.GraphicsDevice.SamplerStates.LinearClamp;
+                case TextureFiltering.Anisotropic:
+                    return MyraEnvironment.Game.GraphicsDevice.SamplerStates.AnisotropicClamp;
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+        }
+#endif
 
         public void End()
 		{
@@ -523,7 +538,7 @@ public void Dispose()
 
         public void SetAnisotropicFilteringMode(bool isAnisotropicFiltering)
         {
-            IsAnisotropicFilteringOn = isAnisotropicFiltering;
+            _isAnisotropicFilteringOn = isAnisotropicFiltering;
         }
     }
 }