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> Unreal Engine API Reference > Runtime > RenderCore > FShaderCode > AddOptionalData > FShaderCode::AddOptionalData

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FShaderCode::AddOptionalData

Note: we don't hash the optional attachments in GenerateOutputHash() as they would prevent sharing (e.g. many material share the save VS) can be called after the non optional data was stored in ShaderData

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MacOS

Linux

References

Module	RenderCore
Header	/Engine/Source/Runtime/RenderCore/Public/ShaderCore.h
Include	#include "ShaderCore.h"

Syntax

void AddOptionalData
(
    uint8 Key,
    const uint8 * ValuePtr,
    uint32 ValueSize
)

Remarks

Note: we don't hash the optional attachments in GenerateOutputHash() as they would prevent sharing (e.g. many material share the save VS) can be called after the non optional data was stored in ShaderData

Parameters

Parameter	Description
Key	uint8 to save memory so max 255, e.g. FShaderCodePackedResourceCounts::Key
Size	0, only restriction is that sum of all optional data values must be < 4GB

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