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());
}
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);
}
}