SceneFilterRendering.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================
    SceneFilterRendering.h: Filter rendering definitions.
=============================================================================*/
 
#pragma once
 
#include "CoreMinimal.h"
#include "RenderResource.h"
#include "RendererInterface.h"
#include "ShaderParameters.h"
#include "Shader.h"
#include "PostProcess/SceneRenderTargets.h"
#include "ShaderParameterUtils.h"
#include "SceneRenderTargetParameters.h"
 
enum class EStereoscopicPass;
 
BEGIN_GLOBAL_SHADER_PARAMETER_STRUCT( FDrawRectangleParameters, )
    SHADER_PARAMETER( FVector4f, PosScaleBias )
    SHADER_PARAMETER( FVector4f, UVScaleBias )
    SHADER_PARAMETER( FVector4f, InvTargetSizeAndTextureSize )
END_GLOBAL_SHADER_PARAMETER_STRUCT()
 
extern RENDERER_API void DrawRectangle(
    FRHICommandList& RHICmdList,
    float X,
    float Y,
    float SizeX,
    float SizeY,
    float U,
    float V,
    float SizeU,
    float SizeV,
    FIntPoint TargetSize,
    FIntPoint TextureSize,
    const TShaderRef<FShader>& VertexShader,
    EDrawRectangleFlags Flags = EDRF_Default,
    uint32 InstanceCount = 1
    );
 
// NOTE: Assumes previously set PSO has PrimitiveType = PT_TriangleList
extern RENDERER_API void DrawTransformedRectangle(
    FRHICommandList& RHICmdList,
    float X,
    float Y,
    float SizeX,
    float SizeY,
    const FMatrix& PosTransform,
    float U,
    float V,
    float SizeU,
    float SizeV,
    const FMatrix& TexTransform,
    FIntPoint TargetSize,
    FIntPoint TextureSize
    );
 
// NOTE: Assumes previously set PSO has PrimitiveType = PT_TriangleList
extern RENDERER_API void DrawHmdMesh(
    FRHICommandList& RHICmdList,
    float X,
    float Y,
    float SizeX,
    float SizeY,
    float U,
    float V,
    float SizeU,
    float SizeV,
    FIntPoint TargetSize,
    FIntPoint TextureSize,
    EStereoscopicPass StereoView,
    const TShaderRef<FShader>& VertexShader,
    int32 InstanceCount = 1
    );
 
// NOTE: Assumes previously set PSO has PrimitiveType = PT_TriangleList
extern RENDERER_API void DrawPostProcessPass(
    FRHICommandList& RHICmdList,
    float X,
    float Y,
    float SizeX,
    float SizeY,
    float U,
    float V,
    float SizeU,
    float SizeV,
    FIntPoint TargetSize,
    FIntPoint TextureSize,
    const TShaderRef<FShader>& VertexShader,
    int32 StereoViewIndex,
    bool bHasCustomMesh,
    EDrawRectangleFlags Flags = EDRF_Default,
    int32 InstanceCount = 1
    );
 
class FTesselatedScreenRectangleIndexBuffer : public FIndexBuffer
{
public:
 
    // if one of those constants change, UpscaleVS needs to be recompiled
 
    // number of quads in x
    static const uint32 Width = 32;     // used for CylindricalProjection (smaller FOV could do less tessellation)
    // number of quads in y
    static const uint32 Height = 20;    // to minimize distortion we also tessellate in Y but a perspective distortion could do that with fewer triangles.
 
    void InitRHI(FRHICommandListBase& RHICmdList) override;
 
    uint32 NumVertices() const;
 
    uint32 NumPrimitives() const;
};