void FRCPassPostProcessScreenSpaceReflections::Process(FRenderingCompositePassContext& Context)
{
SCOPED_DRAW_EVENT(Context.RHICmdList, ScreenSpaceReflections, DEC_SCENE_ITEMS);
const FSceneView& View = Context.View;
const auto FeatureLevel = Context.GetFeatureLevel();
const FSceneRenderTargetItem& DestRenderTarget = PassOutputs[0].RequestSurface(Context);
// Set the view family's render target/viewport.
SetRenderTarget(Context.RHICmdList, DestRenderTarget.TargetableTexture, FTextureRHIRef());
Context.RHICmdList.Clear(true, FLinearColor(0, 0, 0, 0), false, 1.0f, false, 0, FIntRect());
Context.SetViewportAndCallRHI(View.ViewRect);
// set the state
Context.RHICmdList.SetBlendState(TStaticBlendState<>::GetRHI());
Context.RHICmdList.SetRasterizerState(TStaticRasterizerState<>::GetRHI());
Context.RHICmdList.SetDepthStencilState(TStaticDepthStencilState<false, CF_Always>::GetRHI());
int SSRQuality = ComputeSSRQuality(View.FinalPostProcessSettings.ScreenSpaceReflectionQuality);
SSRQuality = FMath::Clamp(SSRQuality, 1, 4);
uint32 iPreFrame = bPrevFrame ? 1 : 0;
if (View.Family->EngineShowFlags.VisualizeSSR)
{
iPreFrame = 0;
SSRQuality = 0;
}
TShaderMapRef< FPostProcessVS > VertexShader(Context.GetShaderMap());
#define CASE(A, B) \
case (A + 2 * (B + 3 * 0 )): \
{ \
TShaderMapRef< FPostProcessScreenSpaceReflectionsPS<A, B> > PixelShader(Context.GetShaderMap()); \
static FGlobalBoundShaderState BoundShaderState; \
SetGlobalBoundShaderState(Context.RHICmdList, FeatureLevel, BoundShaderState, GFilterVertexDeclaration.VertexDeclarationRHI, *VertexShader, *PixelShader); \
VertexShader->SetParameters(Context); \
PixelShader->SetParameters(Context); \
}; \
break
switch (iPreFrame + 2 * (SSRQuality + 3 * 0))
{
CASE(0,0);
CASE(0,1); CASE(1,1);
CASE(0,2); CASE(1,2);
CASE(0,3); CASE(1,3);
CASE(0,4); CASE(1,4);
default:
check(!"Missing case in FRCPassPostProcessScreenSpaceReflections");
}
#undef CASE
// Draw a quad mapping scene color to the view's render target
DrawRectangle(
Context.RHICmdList,
0, 0,
View.ViewRect.Width(), View.ViewRect.Height(),
View.ViewRect.Min.X, View.ViewRect.Min.Y,
View.ViewRect.Width(), View.ViewRect.Height(),
View.ViewRect.Size(),
GSceneRenderTargets.GetBufferSizeXY(),
*VertexShader,
EDRF_UseTriangleOptimization);
Context.RHICmdList.CopyToResolveTarget(DestRenderTarget.TargetableTexture, DestRenderTarget.ShaderResourceTexture, false, FResolveParams());
}
void FRCPassPostProcessScreenSpaceReflections::Process(FRenderingCompositePassContext& Context)
{
auto& RHICmdList = Context.RHICmdList;
FSceneRenderTargets& SceneContext = FSceneRenderTargets::Get(RHICmdList);
const FSceneView& View = Context.View;
const auto FeatureLevel = Context.GetFeatureLevel();
int32 SSRQuality = ComputeSSRQuality(View.FinalPostProcessSettings.ScreenSpaceReflectionQuality);
uint32 iPreFrame = bPrevFrame ? 1 : 0;
SSRQuality = FMath::Clamp(SSRQuality, 1, 4);
const bool VisualizeSSR = View.Family->EngineShowFlags.VisualizeSSR;
const bool SSRStencilPrePass = CVarSSRStencil.GetValueOnRenderThread() != 0 && !VisualizeSSR;
FRenderingCompositeOutputRef* Input2 = GetInput(ePId_Input2);
const bool SSRConeTracing = Input2 && Input2->GetOutput();
if (VisualizeSSR)
{
iPreFrame = 0;
SSRQuality = 0;
}
else if (SSRConeTracing)
{
SSRQuality = SSRConeQuality;
}
const FSceneRenderTargetItem& DestRenderTarget = PassOutputs[0].RequestSurface(Context);
if (SSRStencilPrePass)
{ // ScreenSpaceReflectionsStencil draw event
SCOPED_DRAW_EVENT(RHICmdList, ScreenSpaceReflectionsStencil);
TShaderMapRef< FPostProcessVS > VertexShader(Context.GetShaderMap());
TShaderMapRef< FPostProcessScreenSpaceReflectionsStencilPS > PixelShader(Context.GetShaderMap());
// bind the dest render target and the depth stencil render target
SetRenderTarget(RHICmdList, DestRenderTarget.TargetableTexture, SceneContext.GetSceneDepthSurface(), ESimpleRenderTargetMode::EUninitializedColorAndDepth, FExclusiveDepthStencil::DepthRead_StencilWrite);
Context.SetViewportAndCallRHI(View.ViewRect);
// Clear stencil to 0
RHICmdList.Clear(false, FLinearColor::White, false, (float)ERHIZBuffer::FarPlane, true, 0, View.ViewRect);
// bind shader
static FGlobalBoundShaderState BoundShaderState;
SetGlobalBoundShaderState(Context.RHICmdList, FeatureLevel, BoundShaderState, GFilterVertexDeclaration.VertexDeclarationRHI, *VertexShader, *PixelShader);
VertexShader->SetParameters(Context);
PixelShader->SetParameters(Context, SSRQuality, true);
// Clobers the stencil to pixel that should not compute SSR
RHICmdList.SetDepthStencilState(TStaticDepthStencilState<false, CF_Always, true, CF_Always, SO_Replace, SO_Replace, SO_Replace>::GetRHI(), 0x80);
// Set rasterizer state to solid
RHICmdList.SetRasterizerState(TStaticRasterizerState<>::GetRHI());
// disable blend mode
RHICmdList.SetBlendState(TStaticBlendState<>::GetRHI());
// Draw a quad mapping scene color to the view's render target to set stencil to set the stencil mask where it needs to be
DrawRectangle(
Context.RHICmdList,
0, 0,
View.ViewRect.Width(), View.ViewRect.Height(),
View.ViewRect.Min.X, View.ViewRect.Min.Y,
View.ViewRect.Width(), View.ViewRect.Height(),
View.ViewRect.Size(),
SceneContext.GetBufferSizeXY(),
*VertexShader,
EDRF_UseTriangleOptimization);
} // ScreenSpaceReflectionsStencil draw event
{ // ScreenSpaceReflections draw event
SCOPED_DRAW_EVENT(Context.RHICmdList, ScreenSpaceReflections);
if (SSRStencilPrePass)
{
// set up the stencil test to match 0, meaning FPostProcessScreenSpaceReflectionsStencilPS has been discarded
RHICmdList.SetDepthStencilState(TStaticDepthStencilState<false, CF_Always, true, CF_Equal, SO_Keep, SO_Keep, SO_Keep>::GetRHI(), 0);
}
else
{
// bind only the dest render target
SetRenderTarget(RHICmdList, DestRenderTarget.TargetableTexture, FTextureRHIRef());
Context.SetViewportAndCallRHI(View.ViewRect);
RHICmdList.SetDepthStencilState(TStaticDepthStencilState<false, CF_Always>::GetRHI());
}
// clear DestRenderTarget only outside of the view's rectangle
RHICmdList.Clear(true, FLinearColor::Black, false, (float)ERHIZBuffer::FarPlane, false, 0, View.ViewRect);
// set the state
RHICmdList.SetBlendState(TStaticBlendState<>::GetRHI());
RHICmdList.SetRasterizerState(TStaticRasterizerState<>::GetRHI());
TShaderMapRef< FPostProcessVS > VertexShader(Context.GetShaderMap());
#define CASE(A, B) \
case (A + 2 * (B + 3 * 0 )): \
{ \
TShaderMapRef< FPostProcessScreenSpaceReflectionsPS<A, B> > PixelShader(Context.GetShaderMap()); \
static FGlobalBoundShaderState BoundShaderState; \
SetGlobalBoundShaderState(RHICmdList, FeatureLevel, BoundShaderState, GFilterVertexDeclaration.VertexDeclarationRHI, *VertexShader, *PixelShader); \
VertexShader->SetParameters(Context); \
PixelShader->SetParameters(Context); \
}; \
break
switch (iPreFrame + 2 * (SSRQuality + 3 * 0))
{
CASE(0,0);
CASE(0,1); CASE(1,1);
CASE(0,2); CASE(1,2);
CASE(0,3); CASE(1,3);
CASE(0,4); CASE(1,4);
CASE(0,5); CASE(1,5); //SSRConeQuality
default:
check(!"Missing case in FRCPassPostProcessScreenSpaceReflections");
}
#undef CASE
// Draw a quad mapping scene color to the view's render target
DrawRectangle(
RHICmdList,
0, 0,
View.ViewRect.Width(), View.ViewRect.Height(),
View.ViewRect.Min.X, View.ViewRect.Min.Y,
View.ViewRect.Width(), View.ViewRect.Height(),
View.ViewRect.Size(),
FSceneRenderTargets::Get(Context.RHICmdList).GetBufferSizeXY(),
*VertexShader,
EDRF_UseTriangleOptimization);
RHICmdList.CopyToResolveTarget(DestRenderTarget.TargetableTexture, DestRenderTarget.ShaderResourceTexture, false, FResolveParams());
} // ScreenSpaceReflections
}
