コード例 #1
0
void FRCPassPostProcessWeightedSampleSum::Process(FRenderingCompositePassContext& Context)
{
	const FSceneView& View = Context.View;

	FRenderingCompositeOutput *Input = PassInputs[0].GetOutput();

	// input is not hooked up correctly
	check(Input);

	const FPooledRenderTargetDesc* InputDesc = GetInputDesc(ePId_Input0);

	// input is not hooked up correctly
	check(InputDesc);

	const FSceneViewFamily& ViewFamily = *(View.Family);

	FIntPoint SrcSize = InputDesc->Extent;
	FIntPoint DestSize = PassOutputs[0].RenderTargetDesc.Extent;

	// e.g. 4 means the input texture is 4x smaller than the buffer size
	FIntPoint SrcScaleFactor = GSceneRenderTargets.GetBufferSizeXY() / SrcSize;
	FIntPoint DstScaleFactor = GSceneRenderTargets.GetBufferSizeXY() / DestSize;

	TRefCountPtr<IPooledRenderTarget> InputPooledElement = Input->RequestInput();

	check(!InputPooledElement->IsFree());

	const FSceneRenderTargetItem& DestRenderTarget = PassOutputs[0].RequestSurface(Context);

	FVector2D InvSrcSize(1.0f / SrcSize.X, 1.0f / SrcSize.Y);
	// we scale by width because FOV is defined horizontally
	float SrcSizeForThisAxis = View.ViewRect.Width() / (float)SrcScaleFactor.X;

	// in texel (input resolution), /2 as we use the diameter, 100 as we use percent
	float EffectiveBlurRadius = SizeScale * SrcSizeForThisAxis  / 2 / 100.0f;

	FVector2D BlurOffsets[MAX_FILTER_SAMPLES];
	FLinearColor BlurWeights[MAX_FILTER_SAMPLES];
	FVector2D OffsetAndWeight[MAX_FILTER_SAMPLES];

	const auto FeatureLevel = Context.View.GetFeatureLevel();

	// compute 1D filtered samples
	uint32 MaxNumSamples = GetMaxNumSamples(FeatureLevel);

	uint32 NumSamples = Compute1DGaussianFilterKernel(FeatureLevel, EffectiveBlurRadius, OffsetAndWeight, MaxNumSamples, FilterShape, CrossCenterWeight);

	SCOPED_DRAW_EVENTF(Context.RHICmdList, PostProcessWeightedSampleSum, TEXT("PostProcessWeightedSampleSum#%d"), NumSamples);

	// compute weights as weighted contributions of the TintValue
	for(uint32 i = 0; i < NumSamples; ++i)
	{
		BlurWeights[i] = TintValue * OffsetAndWeight[i].Y;
	}

	SetRenderTarget(Context.RHICmdList, DestRenderTarget.TargetableTexture, FTextureRHIRef());

	Context.SetViewportAndCallRHI(0, 0, 0.0f, DestSize.X, DestSize.Y, 1.0f);

	// set the state
	Context.RHICmdList.SetBlendState(TStaticBlendState<>::GetRHI());
	Context.RHICmdList.SetRasterizerState(TStaticRasterizerState<>::GetRHI());
	Context.RHICmdList.SetDepthStencilState(TStaticDepthStencilState<false, CF_Always>::GetRHI());

	const FTextureRHIRef& FilterTexture = InputPooledElement->GetRenderTargetItem().ShaderResourceTexture;

	FRenderingCompositeOutput *Input1 = PassInputs[1].GetOutput();

	uint32 CombineMethodInt = 0;

	if(CombineMethod == EFCM_MaxMagnitude)
	{
		CombineMethodInt = 2;
	}

	// can be optimized
	FTextureRHIRef AdditiveTexture;

	if(Input1)
	{
		TRefCountPtr<IPooledRenderTarget> InputPooledElement1 = Input1->RequestInput();
		AdditiveTexture = InputPooledElement1->GetRenderTargetItem().ShaderResourceTexture;

		check(CombineMethod == EFCM_Weighted);

		CombineMethodInt = 1;
	}

	bool bDoFastBlur = DoFastBlur();

	if (FilterShape == EFS_Horiz)
	{
		float YOffset = bDoFastBlur ? (InvSrcSize.Y * 0.5f) : 0.0f;
		for (uint32 i = 0; i < NumSamples; ++i)
		{
			BlurOffsets[i] = FVector2D(InvSrcSize.X * OffsetAndWeight[i].X, YOffset);
		}
	}
	else
	{
		float YOffset = bDoFastBlur ? -(InvSrcSize.Y * 0.5f) : 0.0f;
		for (uint32 i = 0; i < NumSamples; ++i)
		{
			BlurOffsets[i] = FVector2D(0, InvSrcSize.Y * OffsetAndWeight[i].X + YOffset);
		}
	}

	FShader* VertexShader = nullptr;
	SetFilterShaders(
		Context.RHICmdList,
		FeatureLevel,
		TStaticSamplerState<SF_Bilinear,AM_Border,AM_Border,AM_Clamp>::GetRHI(),
		FilterTexture,
		AdditiveTexture,
		CombineMethodInt,
		BlurOffsets,
		BlurWeights,
		NumSamples,
		&VertexShader
		);

	bool bRequiresClear = true;
	// check if we have to clear the whole surface.
	// Otherwise perform the clear when the dest rectangle has been computed.
	if (FeatureLevel == ERHIFeatureLevel::ES2 || FeatureLevel == ERHIFeatureLevel::ES3_1)
	{
		Context.RHICmdList.Clear(true, FLinearColor(0, 0, 0, 0), false, 1.0f, false, 0, FIntRect());
		bRequiresClear = false;
	}

	FIntRect SrcRect =  FIntRect::DivideAndRoundUp(View.ViewRect, SrcScaleFactor);
	FIntRect DestRect = FIntRect::DivideAndRoundUp(View.ViewRect, DstScaleFactor);

	DrawQuad(Context.RHICmdList, bDoFastBlur, SrcRect, DestRect, bRequiresClear, DestSize, SrcSize, VertexShader);

	Context.RHICmdList.CopyToResolveTarget(DestRenderTarget.TargetableTexture, DestRenderTarget.ShaderResourceTexture, false, FResolveParams());
}
コード例 #2
0
	void SetPS(const FRenderingCompositePassContext& Context)
	{
		const FPixelShaderRHIParamRef ShaderRHI = GetPixelShader();

		FGlobalShader::SetParameters(Context.RHICmdList, ShaderRHI, Context.View);

		DeferredParameters.Set(Context.RHICmdList, ShaderRHI, Context.View);

		const FPostProcessSettings& Settings = Context.View.FinalPostProcessSettings;
		const FSceneViewFamily& ViewFamily = *(Context.View.Family);
		FSceneViewState* ViewState = (FSceneViewState*)Context.View.State;

		PostprocessParameter.SetPS(ShaderRHI, Context, TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI());

		// PostprocessInput1MS and EditorPrimitivesStencil
		{
			FRenderingCompositeOutputRef* OutputRef = Context.Pass->GetInput(ePId_Input1);

			check(OutputRef);

			FRenderingCompositeOutput* Input = OutputRef->GetOutput();

			check(Input);

			TRefCountPtr<IPooledRenderTarget> InputPooledElement = Input->RequestInput();

			check(InputPooledElement);

			FTexture2DRHIRef& TargetableTexture = (FTexture2DRHIRef&)InputPooledElement->GetRenderTargetItem().TargetableTexture;

			SetTextureParameter(Context.RHICmdList, ShaderRHI, PostprocessInput1MS, TargetableTexture);

			if(EditorPrimitivesStencil.IsBound())
			{
				// cache the stencil SRV to avoid create calls each frame (the cache element is stored in the state)
				if(ViewState->SelectionOutlineCacheKey != TargetableTexture)
				{
					// release if not the right one (as the internally SRV stores a pointer to the texture we cannot get a false positive)
					ViewState->SelectionOutlineCacheKey.SafeRelease();
					ViewState->SelectionOutlineCacheValue.SafeRelease();
				}

				if(!ViewState->SelectionOutlineCacheValue)
				{
					// create if needed
					ViewState->SelectionOutlineCacheKey = TargetableTexture;
					ViewState->SelectionOutlineCacheValue = RHICreateShaderResourceView(TargetableTexture, 0, 1, PF_X24_G8);
				}

				SetSRVParameter(Context.RHICmdList, ShaderRHI, EditorPrimitivesStencil, ViewState->SelectionOutlineCacheValue);
		}
		}

#if WITH_EDITOR
		{
			FLinearColor OutlineColorValue = Context.View.SelectionOutlineColor;
			FLinearColor SubduedOutlineColorValue = Context.View.SubduedSelectionOutlineColor;
			OutlineColorValue.A = GEngine->SelectionHighlightIntensity;

			SetShaderValue(Context.RHICmdList, ShaderRHI, OutlineColor, OutlineColorValue);
			SetShaderValue(Context.RHICmdList, ShaderRHI, SubduedOutlineColor, SubduedOutlineColorValue);
			SetShaderValue(Context.RHICmdList, ShaderRHI, BSPSelectionIntensity, GEngine->BSPSelectionHighlightIntensity);
		}
#else
		check(!"This shader is not used outside of the Editor.");
#endif

		{
			static const auto CVar = IConsoleManager::Get().FindTConsoleVariableDataFloat(TEXT("r.Editor.MovingPattern"));
		
			FLinearColor Value(0, CVar->GetValueOnRenderThread(), 0, 0);

			if(!ViewFamily.bRealtimeUpdate)
			{
				// no animation if realtime update is disabled
				Value.G = 0;
			}

			SetShaderValue(Context.RHICmdList, ShaderRHI, EditorRenderParams, Value);
		}
	}