// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.

#pragma once

#include "Core.h"
#include "ShaderCore.h"

/**
 * Preprocess a shader.
 * @param OutPreprocessedShader - Upon return contains the preprocessed source code.
 * @param ShaderOutput - ShaderOutput to which errors can be added.
 * @param ShaderInput - The shader compiler input.
 * @param AdditionalDefines - Additional defines with which to preprocess the shader.
 * @returns true if the shader is preprocessed without error.
 */
extern SHADERPREPROCESSOR_API bool PreprocessShader(
	FString& OutPreprocessedShader,
	FShaderCompilerOutput& ShaderOutput,
	const FShaderCompilerInput& ShaderInput,
	const FShaderCompilerDefinitions& AdditionalDefines
	);

/**
 * Preprocess a shader file, for non-usf files.
 * @param OutPreprocessedShader - Upon return contains the preprocessed source code.
 * @param ShaderOutput - ShaderOutput to which errors can be added.
 * @param ShaderInput - The shader compiler input.
 * @returns true if the shader is preprocessed without error.
 */
extern SHADERPREPROCESSOR_API bool PreprocessShaderFile(
	FString& OutPreprocessedShader,
	TArray<FShaderCompilerError>& OutShaderErrors,
	const FString& InShaderFile
	);