ResourceSignatureD3D12: use correct array size for inline constants when remapping resources (#672)

Author: TheMostDiligent

Graphics/GraphicsEngine/interface/PipelineResourceSignature.h

@@ -285,6 +285,9 @@ struct PipelineResourceDesc
     SHADER_TYPE                    ShaderStages  DEFAULT_INITIALIZER(SHADER_TYPE_UNKNOWN);
 
     /// Resource array size (must be 1 for non-array resources).
+    ///
+    /// For inline constants (see PIPELINE_RESOURCE_FLAG_INLINE_CONSTANTS),
+    /// this member specifies the number of 4-byte values.
     Uint32                         ArraySize     DEFAULT_INITIALIZER(1);
 
     /// Resource type, see Diligent::SHADER_RESOURCE_TYPE.

Graphics/GraphicsEngineD3D12/src/PipelineResourceSignatureD3D12Impl.cpp

@@ -730,12 +730,18 @@ void PipelineResourceSignatureD3D12Impl::UpdateShaderResourceBindingMap(Resource
 
         if ((ResDesc.ShaderStages & ShaderStage) != 0)
         {
+            VERIFY((ResDesc.Flags & PIPELINE_RESOURCE_FLAG_INLINE_CONSTANTS) == 0 || ResDesc.ResourceType == SHADER_RESOURCE_TYPE_CONSTANT_BUFFER,
+                   "Only constant buffers can be marked as INLINE_CONSTANTS. This error should've been caught by ValidatePipelineResourceSignatureDesc().");
+            const Uint32 ArraySize = (ResDesc.Flags & PIPELINE_RESOURCE_FLAG_INLINE_CONSTANTS) ?
+                1 : // For inline constants, ArraySize is the number of 4-byte constants
+                ResDesc.ArraySize;
+
             ResourceBinding::BindInfo BindInfo //
                 {
                     Attribs.Register,
                     Attribs.Space + BaseRegisterSpace,
-                    ResDesc.ArraySize,
-                    ResDesc.ResourceType //
+                    ArraySize,
+                    ResDesc.ResourceType,
                 };
             bool IsUnique = ResourceMap.emplace(HashMapStringKey{ResDesc.Name}, BindInfo).second;
             VERIFY(IsUnique, "Shader resource '", ResDesc.Name,