MeshMaterialShaderType.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    MeshMaterialShader.h: Mesh material shader definitions.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "Shader.h"
#include "MaterialShaderType.h"
 
class FMaterial;
class FMaterialShaderMapId;
class FShaderCommonCompileJob;
class FShaderCompileJob;
class FUniformExpressionSet;
class FVertexFactoryType;
class FMeshMaterialShader;
enum class EShaderCompileJobPriority : uint8;
 
class FMeshMaterialShaderType : public FShaderType
{
public:
    struct CompiledShaderInitializerType : FMaterialShaderType::CompiledShaderInitializerType
    {
        const FVertexFactoryType* VertexFactoryType;
        CompiledShaderInitializerType(
            const FShaderType* InType,
            int32 PermutationId,
            const FShaderCompilerOutput& CompilerOutput,
            const FUniformExpressionSet& InUniformExpressionSet,
            const FSHAHash& InMaterialShaderMapHash,
            const FString& InDebugDescription,
            const FShaderPipelineType* InShaderPipeline,
            const FVertexFactoryType* InVertexFactoryType
            ):
            FMaterialShaderType::CompiledShaderInitializerType(InType,PermutationId,CompilerOutput,InUniformExpressionSet,InMaterialShaderMapHash,InShaderPipeline,InVertexFactoryType,InDebugDescription),
            VertexFactoryType(InVertexFactoryType)
        {}
    };
 
    IMPLEMENT_SHADER_TYPE_CONSTRUCTOR(FMeshMaterialShaderType, EShaderTypeForDynamicCast::MeshMaterial, TEXT("mesh material shader"));
 
#if WITH_EDITOR
    void BeginCompileShader(
        EShaderCompileJobPriority Priority,
        uint32 ShaderMapJobId,
        int32 PermutationId,
        EShaderPlatform Platform,
        EShaderPermutationFlags PermutationFlags,
        const FMaterial* Material,
        const FMaterialShaderMapId& ShaderMapId,
        FSharedShaderCompilerEnvironment* MaterialEnvironment,
        const FVertexFactoryType* VertexFactoryType,
        TArray<TRefCountPtr<FShaderCommonCompileJob>>& NewJobs,
        const FString& DebugGroupName,
        const TCHAR* DebugDescription,
        const TCHAR* DebugExtension
        ) const;
 
    static void BeginCompileShaderPipeline(
        EShaderCompileJobPriority Priority,
        uint32 ShaderMapJobId,
        int32 PermutationId,
        EShaderPlatform Platform,
        EShaderPermutationFlags PermutationFlags,
        const FMaterial* Material,
        const FMaterialShaderMapId& ShaderMapId,
        FSharedShaderCompilerEnvironment* MaterialEnvironment,
        const FVertexFactoryType* VertexFactoryType,
        const FShaderPipelineType* ShaderPipeline,
        TArray<TRefCountPtr<FShaderCommonCompileJob>>& NewJobs,
        const FString& DebugGroupName,
        const TCHAR* DebugDescription,
        const TCHAR* DebugExtension
        );
 
    FShader* FinishCompileShader(
        const FUniformExpressionSet& UniformExpressionSet, 
        const FSHAHash& MaterialShaderMapHash,
        const FShaderCompileJob& CurrentJob,
        const FShaderPipelineType* ShaderPipeline,
        const FString& InDebugDescription
        ) const;
#endif // WITH_EDITOR
 
    bool ShouldCompilePermutation(EShaderPlatform Platform, const FMaterialShaderParameters& MaterialParameters, const FVertexFactoryType* VertexFactoryType, int32 PermutationId, EShaderPermutationFlags Flags) const;
 
    static bool ShouldCompileVertexFactoryPermutation(EShaderPlatform Platform, const FMaterialShaderParameters& MaterialParameters, const FVertexFactoryType* VertexFactoryType, const FShaderType* ShaderType, EShaderPermutationFlags Flags);
 
    static bool ShouldCompileVertexFactoryPipeline(const FShaderPipelineType* ShaderPipelineType, EShaderPlatform Platform, const FMaterialShaderParameters& MaterialParameters, const FVertexFactoryType* VertexFactoryType, EShaderPermutationFlags Flags);
 
    static bool ShouldCompilePipeline(const FShaderPipelineType* ShaderPipelineType, EShaderPlatform Platform, const FMaterialShaderParameters& MaterialParameters, const FVertexFactoryType* VertexFactoryType, EShaderPermutationFlags Flags);
 
#if WITH_EDITOR
    void SetupCompileEnvironment(EShaderPlatform Platform, const FMaterialShaderParameters& MaterialParameters, const FVertexFactoryType* VertexFactoryType, int32 PermutationId, EShaderPermutationFlags PermutationFlags, FShaderCompilerEnvironment& Environment) const;
#endif // WITH_EDITOR
};