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Dalamud/Utility/TerraFxCom/TerraFxD3D11Extensions.cs

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+using TerraFX.Interop.DirectX;
+using TerraFX.Interop.Windows;
+
+namespace Dalamud.Utility.TerraFxCom;
+
+/// <summary>Extension methods for D3D11 TerraFX objects.</summary>
+internal static class TerraFxD3D11Extensions
+{
+    /// <summary>Creates a 2D texture with the given descriptor.</summary>
+    /// <param name="device">Device to copy from and to.</param>
+    /// <param name="desc">Resource descriptor.</param>
+    /// <param name="copyFrom">Optional initial data for the texture.</param>
+    /// <returns>New copied texture.</returns>
+    public static unsafe ComPtr<ID3D11Texture2D> CreateTexture2D(
+        this ComPtr<ID3D11Device> device,
+        D3D11_TEXTURE2D_DESC desc,
+        ComPtr<ID3D11Texture2D> copyFrom = default)
+    {
+        using var tmpTex = default(ComPtr<ID3D11Texture2D>);
+        device.Get()->CreateTexture2D(&desc, null, tmpTex.GetAddressOf()).ThrowOnError();
+
+        if (!copyFrom.IsEmpty())
+        {
+            using var context = default(ComPtr<ID3D11DeviceContext>);
+            device.Get()->GetImmediateContext(context.GetAddressOf());
+            context.Get()->CopyResource((ID3D11Resource*)tmpTex.Get(), (ID3D11Resource*)copyFrom.Get());
+        }
+
+        return new(tmpTex);
+    }
+
+    /// <summary>Creates a shader resource view for a resource.</summary>
+    /// <param name="device">Device to create the resource view into.</param>
+    /// <param name="resource">Resource to create a view on.</param>
+    /// <param name="desc">Resource view descriptor.</param>
+    /// <typeparam name="T">Type of the resource.</typeparam>
+    /// <returns>New shader resource view.</returns>
+    public static unsafe ComPtr<ID3D11ShaderResourceView> CreateShaderResourceView<T>(
+        this ComPtr<ID3D11Device> device,
+        ComPtr<T> resource,
+        in D3D11_SHADER_RESOURCE_VIEW_DESC desc)
+        where T : unmanaged, ID3D11Resource.Interface
+    {
+        fixed (D3D11_SHADER_RESOURCE_VIEW_DESC* pDesc = &desc)
+        {
+            var srv = default(ComPtr<ID3D11ShaderResourceView>);
+            device.Get()->CreateShaderResourceView(
+                    (ID3D11Resource*)resource.Get(),
+                    pDesc,
+                    srv.GetAddressOf())
+                .ThrowOnError();
+            return srv;
+        }
+    }
+    
+    /// <summary>Gets the descriptor for a <see cref="ID3D11Texture2D"/>.</summary>
+    /// <param name="texture">Texture.</param>
+    /// <returns>Texture descriptor.</returns>
+    public static unsafe D3D11_TEXTURE2D_DESC GetDesc(this ComPtr<ID3D11Texture2D> texture)
+    {
+        var desc = default(D3D11_TEXTURE2D_DESC);
+        texture.Get()->GetDesc(&desc);
+        return desc;
+    }
+}