OpenGLShaders.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    OpenGLShaders.h: OpenGL shader RHI declaration.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "OpenGLDrv.h"
 
enum EOpenGLShaderTargetPlatform
{
    OGLSTP_Unknown,
    OGLSTP_Desktop,
    OGLSTP_Android,
    OGLSTP_iOS,
};
 
struct FOpenGLShaderDeviceCapabilities
{
    EOpenGLShaderTargetPlatform TargetPlatform;
    EShaderPlatform MaxRHIShaderPlatform;
    bool bSupportsShaderFramebufferFetch;
    bool bRequiresARMShaderFramebufferFetchDepthStencilUndef;
    GLint MaxVaryingVectors;
    bool bRequiresDisabledEarlyFragmentTests;
    bool bRequiresReadOnlyBuffersWorkaround;
    bool bRequiresPreciseQualifierWorkaround;
};
 
void OPENGLDRV_API GetCurrentOpenGLShaderDeviceCapabilities(FOpenGLShaderDeviceCapabilities& Capabilities);
 
void OPENGLDRV_API GLSLToDeviceCompatibleGLSL(FAnsiCharArray& GlslCodeOriginal, const FString& ShaderName, GLenum TypeEnum, const FOpenGLShaderDeviceCapabilities& Capabilities, FAnsiCharArray& GlslCode);
 
 
// make some anon ns functions available to platform extensions
extern "C" void PE_AppendCString(TArray<ANSICHAR> & Dest, const ANSICHAR * Source);
extern "C" void PE_ReplaceCString(TArray<ANSICHAR> & Dest, const ANSICHAR * Source, const ANSICHAR * Replacement);