1 files changed, 115 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Gpu/Image/Sampler.cs b/src/Ryujinx.Graphics.Gpu/Image/Sampler.cs
new file mode 100644
index 00000000..b70ac9eb
--- /dev/null
+++ b/src/Ryujinx.Graphics.Gpu/Image/Sampler.cs
@@ -0,0 +1,115 @@
+using Ryujinx.Graphics.GAL;
+using System;
+
+namespace Ryujinx.Graphics.Gpu.Image
+{
+    /// <summary>
+    /// Cached sampler entry for sampler pools.
+    /// </summary>
+    class Sampler : IDisposable
+    {
+        /// <summary>
+        /// True if the sampler is disposed, false otherwise.
+        /// </summary>
+        public bool IsDisposed { get; private set; }
+
+        /// <summary>
+        /// Host sampler object.
+        /// </summary>
+        private readonly ISampler _hostSampler;
+
+        /// <summary>
+        /// Host sampler object, with anisotropy forced.
+        /// </summary>
+        private readonly ISampler _anisoSampler;
+
+        /// <summary>
+        /// Creates a new instance of the cached sampler.
+        /// </summary>
+        /// <param name="context">The GPU context the sampler belongs to</param>
+        /// <param name="descriptor">The Maxwell sampler descriptor</param>
+        public Sampler(GpuContext context, SamplerDescriptor descriptor)
+        {
+            MinFilter minFilter = descriptor.UnpackMinFilter();
+            MagFilter magFilter = descriptor.UnpackMagFilter();
+
+            bool seamlessCubemap = descriptor.UnpackSeamlessCubemap();
+
+            AddressMode addressU = descriptor.UnpackAddressU();
+            AddressMode addressV = descriptor.UnpackAddressV();
+            AddressMode addressP = descriptor.UnpackAddressP();
+
+            CompareMode compareMode = descriptor.UnpackCompareMode();
+            CompareOp   compareOp   = descriptor.UnpackCompareOp();
+
+            ColorF color = new ColorF(
+                descriptor.BorderColorR,
+                descriptor.BorderColorG,
+                descriptor.BorderColorB,
+                descriptor.BorderColorA);
+
+            float minLod     = descriptor.UnpackMinLod();
+            float maxLod     = descriptor.UnpackMaxLod();
+            float mipLodBias = descriptor.UnpackMipLodBias();
+
+            float maxRequestedAnisotropy = descriptor.UnpackMaxAnisotropy();
+            float maxSupportedAnisotropy = context.Capabilities.MaximumSupportedAnisotropy;
+
+            _hostSampler = context.Renderer.CreateSampler(new SamplerCreateInfo(
+                minFilter,
+                magFilter,
+                seamlessCubemap,
+                addressU,
+                addressV,
+                addressP,
+                compareMode,
+                compareOp,
+                color,
+                minLod,
+                maxLod,
+                mipLodBias,
+                Math.Min(maxRequestedAnisotropy, maxSupportedAnisotropy)));
+
+            if (GraphicsConfig.MaxAnisotropy >= 0 && GraphicsConfig.MaxAnisotropy <= 16 && (minFilter == MinFilter.LinearMipmapNearest || minFilter == MinFilter.LinearMipmapLinear))
+            {
+                maxRequestedAnisotropy = GraphicsConfig.MaxAnisotropy;
+
+                _anisoSampler = context.Renderer.CreateSampler(new SamplerCreateInfo(
+                    minFilter,
+                    magFilter,
+                    seamlessCubemap,
+                    addressU,
+                    addressV,
+                    addressP,
+                    compareMode,
+                    compareOp,
+                    color,
+                    minLod,
+                    maxLod,
+                    mipLodBias,
+                    Math.Min(maxRequestedAnisotropy, maxSupportedAnisotropy)));
+            }
+        }
+
+        /// <summary>
+        /// Gets a host sampler for the given texture.
+        /// </summary>
+        /// <param name="texture">Texture to be sampled</param>
+        /// <returns>A host sampler</returns>
+        public ISampler GetHostSampler(Texture texture)
+        {
+            return _anisoSampler != null && texture?.CanForceAnisotropy == true ? _anisoSampler : _hostSampler;
+        }
+
+        /// <summary>
+        /// Disposes the host sampler object.
+        /// </summary>
+        public void Dispose()
+        {
+            IsDisposed = true;
+
+            _hostSampler.Dispose();
+            _anisoSampler?.Dispose();
+        }
+    }
+}
+\ No newline at end of file