================
@@ -497,3 +497,49 @@ signature and passed to the shader without requiring a
constant buffer resource:
#. **Num32BitValues**: The number of 32-bit values included in this constant
buffer.
Root constants provide a fast way to pass small amounts of data directly to
the shader without the overhead of creating and binding a constant buffer
resource.
+
+Root Descriptor
+~~~~~~~~~~~~~~~
+
+Root descriptors provide a direct mechanism for binding individual resources
to shader stages in the Direct3D 12
+rendering pipeline. They represent a critical interface for efficient resource
management, allowing applications
+to specify how shader stages access specific GPU resources.
+
+.. code-block:: cpp
+
+ enum RootDescriptorFlags {
+ None = 0,
+ DataVolatile = 0x2,
+ DataStaticWhileSetAtExecute = 0x4,
+ DataStatic = 0x8,
+ }
+
+ // Version 1.0 Root Descriptor
+ struct RootDescriptor_V1_0 {
+ uint32_t ShaderRegister;
+ uint32_t RegisterSpace;
+ };
+
+ // Version 1.1 Root Descriptor
+ struct RootDescriptor_V1_1 {
+ uint32_t ShaderRegister;
+ uint32_t RegisterSpace;
+ // Bitfield of flags from the Flags enum
+ uint32_t Flags;
+ };
+
+Version 1.1 of Root Descriptors has introduced some flags that can hint the
drivers into
+performing further code optimizations. For details about it, check `Direct X
documentation
<https://learn.microsoft.com/en-us/windows/win32/direct3d12/root-signature-version-1-1#static-and-volatile-flags>`_.
----------------
inbelic wrote:
```suggestion
performing further code optimizations. For details, check
`Direct X documentation
<https://learn.microsoft.com/en-us/windows/win32/direct3d12/root-signature-version-1-1#static-and-volatile-flags>`_.
```
https://github.com/llvm/llvm-project/pull/129759
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