void SetParameters(const FRenderingCompositePassContext& Context)
{
const FPixelShaderRHIParamRef ShaderRHI = GetPixelShader();
FGlobalShader::SetParameters(ShaderRHI, Context.View);
DeferredParameters.Set(ShaderRHI, Context.View);
{
bool bFiltered = false;
#if !(UE_BUILD_SHIPPING || UE_BUILD_TEST)
static const auto CVar = IConsoleManager::Get().FindTConsoleVariableDataInt(TEXT("r.MotionBlurFiltering"));
bFiltered = CVar->GetValueOnRenderThread() != 0;
#endif // !(UE_BUILD_SHIPPING || UE_BUILD_TEST)
if(bFiltered)
{
PostprocessParameter.SetPS(ShaderRHI, Context, TStaticSamplerState<SF_Bilinear,AM_Border,AM_Border,AM_Clamp>::GetRHI());
}
else
{
PostprocessParameter.SetPS(ShaderRHI, Context, TStaticSamplerState<SF_Point,AM_Border,AM_Border,AM_Clamp>::GetRHI());
}
}
if( Context.View.Family->EngineShowFlags.CameraInterpolation )
{
// Instead of finding the world space position of the current pixel, calculate the world space position offset by the camera position,
// then translate by the difference between last frame's camera position and this frame's camera position,
// then apply the rest of the transforms. This effectively avoids precision issues near the extents of large levels whose world space position is very large.
FVector ViewOriginDelta = Context.View.ViewMatrices.ViewOrigin - Context.View.PrevViewMatrices.ViewOrigin;
SetShaderValue(ShaderRHI, PrevViewProjMatrix, FTranslationMatrix(ViewOriginDelta) * Context.View.PrevViewRotationProjMatrix);
}
else
{
SetShaderValue( ShaderRHI, PrevViewProjMatrix, Context.View.ViewMatrices.GetViewRotationProjMatrix() );
}
TRefCountPtr<IPooledRenderTarget> InputPooledElement = Context.Pass->GetInput(ePId_Input0)->GetOutput()->RequestInput();
// to mask out samples from outside of the view
{
FIntPoint BufferSize = GSceneRenderTargets.GetBufferSizeXY();
FVector2D InvBufferSize(1.0f / BufferSize.X, 1.0f / BufferSize.Y);
FIntRect ClipRect = Context.View.ViewRect;
// to avoid leaking in content from the outside because of bilinear filtering, shrink
ClipRect.InflateRect(-1);
FVector2D MinUV(ClipRect.Min.X * InvBufferSize.X, ClipRect.Min.Y * InvBufferSize.Y);
FVector2D MaxUV(ClipRect.Max.X * InvBufferSize.X, ClipRect.Max.Y * InvBufferSize.Y);
FVector2D SizeUV = MaxUV - MinUV;
FVector2D Mul(1.0f / SizeUV.X, 1.0f / SizeUV.Y);
FVector2D Add = - MinUV * Mul;
FVector4 TextureViewMadValue(Mul.X, Mul.Y, Add.X, Add.Y);
SetShaderValue(ShaderRHI, TextureViewMad, TextureViewMadValue);
}
{
const float SizeX = Context.View.ViewRect.Width();
const float SizeY = Context.View.ViewRect.Height();
const float AspectRatio = SizeX / SizeY;
const float InvAspectRatio = SizeY / SizeX;
const FSceneViewState* ViewState = (FSceneViewState*) Context.View.State;
float MotionBlurTimeScale = ViewState ? ViewState->MotionBlurTimeScale : 1.0f;
float ViewMotionBlurScale = 0.5f * MotionBlurTimeScale * Context.View.FinalPostProcessSettings.MotionBlurAmount;
// MotionBlurInstanceScale was needed to hack some cases where motion blur wasn't working well, this shouldn't be needed any more, can clean this up later
float MotionBlurInstanceScale = 1;
float ObjectMotionBlurScale = MotionBlurInstanceScale * ViewMotionBlurScale;
// 0:no 1:full screen width, percent conversion
float MaxVelocity = Context.View.FinalPostProcessSettings.MotionBlurMax / 100.0f;
float InvMaxVelocity = 1.0f / MaxVelocity;
// *2 to convert to -1..1 -1..1 screen space
// / MaxFraction to map screenpos to -1..1 normalized MaxFraction
FVector4 MotionBlurParametersValue(
ObjectMotionBlurScale * InvMaxVelocity,
- ObjectMotionBlurScale * InvMaxVelocity * InvAspectRatio,
MaxVelocity * 2,
- MaxVelocity * 2 * AspectRatio);
SetShaderValue(ShaderRHI, MotionBlurParameters, MotionBlurParametersValue);
}
}
void SetParameters(const FRenderingCompositePassContext& Context)
{
const FPixelShaderRHIParamRef ShaderRHI = GetPixelShader();
FGlobalShader::SetParameters(Context.RHICmdList, ShaderRHI, Context.View);
DeferredParameters.Set(Context.RHICmdList, ShaderRHI, Context.View);
{
bool bFiltered = false;
#if !(UE_BUILD_SHIPPING || UE_BUILD_TEST)
bFiltered = CVarMotionBlurFiltering.GetValueOnRenderThread() != 0;
#endif // !(UE_BUILD_SHIPPING || UE_BUILD_TEST)
if(bFiltered)
{
//PostprocessParameter.SetPS(ShaderRHI, Context, TStaticSamplerState<SF_Bilinear,AM_Border,AM_Border,AM_Clamp>::GetRHI());
FSamplerStateRHIParamRef Filters[] =
{
TStaticSamplerState<SF_Bilinear,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
};
PostprocessParameter.SetPS( ShaderRHI, Context, 0, false, Filters );
}
else if( CVarMotionBlurSmoothMax.GetValueOnRenderThread() )
{
FSamplerStateRHIParamRef Filters[] =
{
TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
TStaticSamplerState<SF_Bilinear,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI(),
};
PostprocessParameter.SetPS( ShaderRHI, Context, 0, false, Filters );
}
else
{
PostprocessParameter.SetPS(ShaderRHI, Context, TStaticSamplerState<SF_Point,AM_Clamp,AM_Clamp,AM_Clamp>::GetRHI());
}
}
TRefCountPtr<IPooledRenderTarget> InputPooledElement = Context.Pass->GetInput(ePId_Input0)->GetOutput()->RequestInput();
{
const float SizeX = Context.View.ViewRect.Width();
const float SizeY = Context.View.ViewRect.Height();
const float AspectRatio = SizeX / SizeY;
const float InvAspectRatio = SizeY / SizeX;
const FSceneViewState* ViewState = (FSceneViewState*) Context.View.State;
const float MotionBlurTimeScale = ViewState ? ViewState->MotionBlurTimeScale : 1.0f;
const float ViewMotionBlurScale = 0.5f * MotionBlurTimeScale * Context.View.FinalPostProcessSettings.MotionBlurAmount;
// 0:no 1:full screen width
float MaxVelocity = Context.View.FinalPostProcessSettings.MotionBlurMax / 100.0f;
float InvMaxVelocity = 1.0f / MaxVelocity;
// *2 to convert to -1..1 -1..1 screen space
// / MaxFraction to map screenpos to -1..1 normalized MaxFraction
FVector4 MotionBlurParametersValue(
ViewMotionBlurScale,
AspectRatio,
MaxVelocity,
InvMaxVelocity);
SetShaderValue(Context.RHICmdList, ShaderRHI, MotionBlurParameters, MotionBlurParametersValue);
}
}