MetalShaderParameterCache.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    MetalShaderParameterCache.h: Metal RHI Shader Parameter Cache Class.
=============================================================================*/
 
#pragma once
 
#include "CrossCompilerCommon.h"
#include "MetalRHIPrivate.h"
 
class FMetalBufferData;
struct FMetalShaderBindings;
 
class FMetalShaderParameterCache
{
public:
    FMetalShaderParameterCache();
 
    ~FMetalShaderParameterCache();
 
    inline void PrepareGlobalUniforms(uint32 TypeIndex, uint32 UniformArraySize)
    {
        if (PackedGlobalUniformsSizes[TypeIndex] < UniformArraySize)
        {
            ResizeGlobalUniforms(TypeIndex, UniformArraySize);
        }
    }
 
    void Reset();
 
    void MarkAllDirty();
 
    void Set(uint32 BufferIndex, uint32 ByteOffset, uint32 NumBytes, const void* NewValues);
 
    void CommitPackedGlobals(class FMetalStateCache* Cache, class FMetalCommandEncoder* Encoder, uint32 Frequency, const FMetalShaderBindings& Bindings);
 
private:
    static constexpr uint32 SizeOfFloat = sizeof(float);
 
    FMetalBufferData* PackedGlobalUniforms[CrossCompiler::PACKED_TYPEINDEX_MAX];
 
    struct FRange
    {
        uint32 LowVector;
        uint32 HighVector;
    };
 
    FRange PackedGlobalUniformDirty[CrossCompiler::PACKED_TYPEINDEX_MAX];
 
    uint32 PackedGlobalUniformsSizes[CrossCompiler::PACKED_TYPEINDEX_MAX];
 
    void ResizeGlobalUniforms(uint32 TypeIndex, uint32 UniformArraySize);
};