Initial work

Ryujinx.Graphics.GAL/Sampler/AddressMode.cs

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+namespace Ryujinx.Graphics.GAL.Sampler
+{
+    public enum AddressMode
+    {
+        Repeat,
+        MirroredRepeat,
+        ClampToEdge,
+        ClampToBorder,
+        Clamp,
+        MirrorClampToEdge,
+        MirrorClampToBorder,
+        MirrorClamp
+    }
+}

Ryujinx.Graphics.GAL/Sampler/CompareMode.cs

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+namespace Ryujinx.Graphics.GAL.Sampler
+{
+    public enum CompareMode
+    {
+        None,
+        CompareRToTexture
+    }
+}

Ryujinx.Graphics.GAL/Sampler/MagFilter.cs

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+namespace Ryujinx.Graphics.GAL.Sampler
+{
+    public enum MagFilter
+    {
+        Nearest = 1,
+        Linear
+    }
+}

Ryujinx.Graphics.GAL/Sampler/MinFilter.cs

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+namespace Ryujinx.Graphics.GAL.Sampler
+{
+    public enum MinFilter
+    {
+        Nearest = 1,
+        Linear,
+        NearestMipmapNearest,
+        LinearMipmapNearest,
+        NearestMipmapLinear,
+        LinearMipmapLinear
+    }
+}

Ryujinx.Graphics.GAL/Sampler/SamplerCreateInfo.cs

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+using Ryujinx.Graphics.GAL.Color;
+
+namespace Ryujinx.Graphics.GAL.Sampler
+{
+    public struct SamplerCreateInfo
+    {
+        public MinFilter MinFilter { get; }
+        public MagFilter MagFilter { get; }
+
+        public AddressMode AddressU { get; }
+        public AddressMode AddressV { get; }
+        public AddressMode AddressP { get; }
+
+        public CompareMode CompareMode { get; }
+        public CompareOp   CompareOp   { get; }
+
+        public ColorF BorderColor { get; }
+
+        public float MinLod        { get; }
+        public float MaxLod        { get; }
+        public float MipLodBias    { get; }
+        public float MaxAnisotropy { get; }
+
+        public SamplerCreateInfo(
+            MinFilter   minFilter,
+            MagFilter   magFilter,
+            AddressMode addressU,
+            AddressMode addressV,
+            AddressMode addressP,
+            CompareMode compareMode,
+            CompareOp   compareOp,
+            ColorF      borderColor,
+            float       minLod,
+            float       maxLod,
+            float       mipLodBias,
+            float       maxAnisotropy)
+        {
+            MinFilter     = minFilter;
+            MagFilter     = magFilter;
+            AddressU      = addressU;
+            AddressV      = addressV;
+            AddressP      = addressP;
+            CompareMode   = compareMode;
+            CompareOp     = compareOp;
+            BorderColor   = borderColor;
+            MinLod        = minLod;
+            MaxLod        = maxLod;
+            MipLodBias    = mipLodBias;
+            MaxAnisotropy = maxAnisotropy;
+        }
+    }
+}