[llvm] [DirectX] Documenting Root Signature Binary representation (PR #131011)

[Justin Bogner via llvm-commits]

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@@ -612,3 +612,48 @@ RootDescriptorTable provides basic table structure:
 #. **NumDescriptorRanges**: Number of descriptor ranges
 #. **DescriptorRangesOffset**: Offset to descriptor range array
 
+Static Samplers
+~~~~~~~~~~~~~~~
+
+Static samplers provide a way to define fixed sampler states within the root signature itself.
+
+.. code-block:: cpp
+
+   struct StaticSamplerDesc {
+      FilterMode Filter;
+      TextureAddressMode AddressU;
+      TextureAddressMode AddressV;
+      TextureAddressMode AddressW;
+      float MipLODBias;
+      uint32_t MaxAnisotropy;
+      ComparisonFunc ComparisonFunc;
+      StaticBorderColor BorderColor;
+      float MinLOD;
+      float MaxLOD;
+      uint32_t ShaderRegister;
+      uint32_t RegisterSpace;
+      ShaderVisibility ShaderVisibility;
+   };
+
+
+The StaticSamplerDesc structure defines all properties of a static sampler:
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bogner wrote:

This references a lot of types that aren't defined in this document. As a description of a binary format it really needs to discuss the sizes and layout of things more so than what the things are for.

https://github.com/llvm/llvm-project/pull/131011