From cdeeac163fb134a34c547cf1f45a4dd21daa41ea Mon Sep 17 00:00:00 2001
From: gdk <gab.dark.100@gmail.com>
Date: Sun, 13 Oct 2019 23:24:31 -0300
Subject: [PATCH] Improved Min/Mip -> MinFilter enum conversion

---
 .../Image/SamplerDescriptor.cs                | 38 +++++++++++++++++--
 .../Image/SamplerMinFilter.cs                 |  8 ++++
 .../Image/SamplerMipFilter.cs                 |  9 +++++
 3 files changed, 52 insertions(+), 3 deletions(-)
 create mode 100644 Ryujinx.Graphics.Gpu/Image/SamplerMinFilter.cs
 create mode 100644 Ryujinx.Graphics.Gpu/Image/SamplerMipFilter.cs

diff --git a/Ryujinx.Graphics.Gpu/Image/SamplerDescriptor.cs b/Ryujinx.Graphics.Gpu/Image/SamplerDescriptor.cs
index 0a43dd1b..c94473a2 100644
--- a/Ryujinx.Graphics.Gpu/Image/SamplerDescriptor.cs
+++ b/Ryujinx.Graphics.Gpu/Image/SamplerDescriptor.cs
@@ -94,10 +94,42 @@ namespace Ryujinx.Graphics.Gpu.Image
 
         public MinFilter UnpackMinFilter()
         {
-            int minFilter = (int)(Word1 >> 4) & 3;
-            int mipFilter = (int)(Word1 >> 6) & 3;
+            SamplerMinFilter minFilter = (SamplerMinFilter)((Word1 >> 4) & 3);
+            SamplerMipFilter mipFilter = (SamplerMipFilter)((Word1 >> 6) & 3);
 
-            return (MinFilter)(minFilter + (mipFilter - 1) * 2);
+            return ConvertFilter(minFilter, mipFilter);
+        }
+
+        private static MinFilter ConvertFilter(SamplerMinFilter minFilter, SamplerMipFilter mipFilter)
+        {
+            switch (mipFilter)
+            {
+                case SamplerMipFilter.None:
+                    switch (minFilter)
+                    {
+                        case SamplerMinFilter.Nearest: return MinFilter.Nearest;
+                        case SamplerMinFilter.Linear:  return MinFilter.Linear;
+                    }
+                    break;
+
+                case SamplerMipFilter.Nearest:
+                    switch (minFilter)
+                    {
+                        case SamplerMinFilter.Nearest: return MinFilter.NearestMipmapNearest;
+                        case SamplerMinFilter.Linear:  return MinFilter.LinearMipmapNearest;
+                    }
+                    break;
+
+                case SamplerMipFilter.Linear:
+                    switch (minFilter)
+                    {
+                        case SamplerMinFilter.Nearest: return MinFilter.NearestMipmapLinear;
+                        case SamplerMinFilter.Linear:  return MinFilter.LinearMipmapLinear;
+                    }
+                    break;
+            }
+
+            return MinFilter.Nearest;
         }
 
         public ReductionFilter UnpackReductionFilter()
diff --git a/Ryujinx.Graphics.Gpu/Image/SamplerMinFilter.cs b/Ryujinx.Graphics.Gpu/Image/SamplerMinFilter.cs
new file mode 100644
index 00000000..b3274b64
--- /dev/null
+++ b/Ryujinx.Graphics.Gpu/Image/SamplerMinFilter.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.Graphics.Gpu.Image
+{
+    enum SamplerMinFilter
+    {
+        Nearest = 1,
+        Linear
+    }
+}
diff --git a/Ryujinx.Graphics.Gpu/Image/SamplerMipFilter.cs b/Ryujinx.Graphics.Gpu/Image/SamplerMipFilter.cs
new file mode 100644
index 00000000..0bc9eb92
--- /dev/null
+++ b/Ryujinx.Graphics.Gpu/Image/SamplerMipFilter.cs
@@ -0,0 +1,9 @@
+namespace Ryujinx.Graphics.Gpu.Image
+{
+    enum SamplerMipFilter
+    {
+        None = 1,
+        Nearest,
+        Linear
+    }
+}