// TODO support ExcludeRect
void DrawClearQuadMRT(FRHICommandList& RHICmdList, ERHIFeatureLevel::Type FeatureLevel, bool bClearColor, int32 NumClearColors, const FLinearColor* ClearColorArray, bool bClearDepth, float Depth, bool bClearStencil, uint32 Stencil)
{
// Set new states
FBlendStateRHIParamRef BlendStateRHI;
if (NumClearColors <= 1)
{
BlendStateRHI = bClearColor
? TStaticBlendState<>::GetRHI()
: TStaticBlendState<CW_NONE>::GetRHI();
}
else
{
BlendStateRHI = bClearColor
? TStaticBlendState<>::GetRHI()
: TStaticBlendStateWriteMask<CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE>::GetRHI();
}
const FDepthStencilStateRHIParamRef DepthStencilStateRHI =
(bClearDepth && bClearStencil)
? TStaticDepthStencilState<
true, CF_Always,
true,CF_Always,SO_Replace,SO_Replace,SO_Replace,
false,CF_Always,SO_Replace,SO_Replace,SO_Replace,
0xff,0xff
>::GetRHI()
: bClearDepth
? TStaticDepthStencilState<true, CF_Always>::GetRHI()
: bClearStencil
? TStaticDepthStencilState<
false, CF_Always,
true,CF_Always,SO_Replace,SO_Replace,SO_Replace,
false,CF_Always,SO_Replace,SO_Replace,SO_Replace,
0xff,0xff
>::GetRHI()
: TStaticDepthStencilState<false, CF_Always>::GetRHI();
RHICmdList.SetRasterizerState(TStaticRasterizerState<FM_Solid, CM_None>::GetRHI());
RHICmdList.SetBlendState(BlendStateRHI);
RHICmdList.SetDepthStencilState(DepthStencilStateRHI);
auto ShaderMap = GetGlobalShaderMap(FeatureLevel);
// Set the new shaders
TShaderMapRef<TOneColorVS<true> > VertexShader(ShaderMap);
FOneColorPS* PixelShader = NULL;
// Set the shader to write to the appropriate number of render targets
// On AMD PC hardware, outputting to a color index in the shader without a matching render target set has a significant performance hit
if (NumClearColors <= 1)
{
TShaderMapRef<TOneColorPixelShaderMRT<1> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 2)
{
TShaderMapRef<TOneColorPixelShaderMRT<2> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 3)
{
TShaderMapRef<TOneColorPixelShaderMRT<3> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 4)
{
TShaderMapRef<TOneColorPixelShaderMRT<4> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 5)
{
TShaderMapRef<TOneColorPixelShaderMRT<5> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 6)
{
TShaderMapRef<TOneColorPixelShaderMRT<6> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 7)
{
TShaderMapRef<TOneColorPixelShaderMRT<7> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 8)
{
TShaderMapRef<TOneColorPixelShaderMRT<8> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
SetGlobalBoundShaderState(RHICmdList, FeatureLevel, GClearMRTBoundShaderState[FMath::Max(NumClearColors - 1, 0)], GetVertexDeclarationFVector4(), *VertexShader, PixelShader);
FLinearColor ShaderClearColors[MaxSimultaneousRenderTargets];
FMemory::Memzero(ShaderClearColors);
for (int32 i = 0; i < NumClearColors; i++)
{
ShaderClearColors[i] = ClearColorArray[i];
}
SetShaderValueArray(RHICmdList, PixelShader->GetPixelShader(),PixelShader->ColorParameter,ShaderClearColors,NumClearColors);
{
// Draw a fullscreen quad
/*if(ExcludeRect.Width() > 0 && ExcludeRect.Height() > 0)
{
// with a hole in it (optimization in case the hardware has non constant clear performance)
FVector4 OuterVertices[4];
OuterVertices[0].Set( -1.0f, 1.0f, Depth, 1.0f );
OuterVertices[1].Set( 1.0f, 1.0f, Depth, 1.0f );
OuterVertices[2].Set( 1.0f, -1.0f, Depth, 1.0f );
OuterVertices[3].Set( -1.0f, -1.0f, Depth, 1.0f );
float InvViewWidth = 1.0f / Viewport.Width;
float InvViewHeight = 1.0f / Viewport.Height;
FVector4 FractionRect = FVector4(ExcludeRect.Min.X * InvViewWidth, ExcludeRect.Min.Y * InvViewHeight, (ExcludeRect.Max.X - 1) * InvViewWidth, (ExcludeRect.Max.Y - 1) * InvViewHeight);
FVector4 InnerVertices[4];
InnerVertices[0].Set( FMath::Lerp(-1.0f, 1.0f, FractionRect.X), FMath::Lerp(1.0f, -1.0f, FractionRect.Y), Depth, 1.0f );
InnerVertices[1].Set( FMath::Lerp(-1.0f, 1.0f, FractionRect.Z), FMath::Lerp(1.0f, -1.0f, FractionRect.Y), Depth, 1.0f );
InnerVertices[2].Set( FMath::Lerp(-1.0f, 1.0f, FractionRect.Z), FMath::Lerp(1.0f, -1.0f, FractionRect.W), Depth, 1.0f );
InnerVertices[3].Set( FMath::Lerp(-1.0f, 1.0f, FractionRect.X), FMath::Lerp(1.0f, -1.0f, FractionRect.W), Depth, 1.0f );
FVector4 Vertices[10];
Vertices[0] = OuterVertices[0];
Vertices[1] = InnerVertices[0];
Vertices[2] = OuterVertices[1];
Vertices[3] = InnerVertices[1];
Vertices[4] = OuterVertices[2];
Vertices[5] = InnerVertices[2];
Vertices[6] = OuterVertices[3];
Vertices[7] = InnerVertices[3];
Vertices[8] = OuterVertices[0];
Vertices[9] = InnerVertices[0];
DrawPrimitiveUP(RHICmdList, PT_TriangleStrip, 8, Vertices, sizeof(Vertices[0]) );
}
else*/
{
// without a hole
FVector4 Vertices[4];
Vertices[0].Set( -1.0f, 1.0f, Depth, 1.0f );
Vertices[1].Set( 1.0f, 1.0f, Depth, 1.0f );
Vertices[2].Set( -1.0f, -1.0f, Depth, 1.0f );
Vertices[3].Set( 1.0f, -1.0f, Depth, 1.0f );
DrawPrimitiveUP(RHICmdList, PT_TriangleStrip, 2, Vertices, sizeof(Vertices[0]));
}
}
}
static void ClearQuadSetup( FRHICommandList& RHICmdList, ERHIFeatureLevel::Type FeatureLevel, bool bClearColor, int32 NumClearColors, const FLinearColor* ClearColorArray, bool bClearDepth, float Depth, bool bClearStencil, uint32 Stencil )
{
// Set new states
FBlendStateRHIParamRef BlendStateRHI;
if (NumClearColors <= 1)
{
BlendStateRHI = bClearColor
? TStaticBlendState<>::GetRHI()
: TStaticBlendState<CW_NONE>::GetRHI();
}
else
{
BlendStateRHI = bClearColor
? TStaticBlendState<>::GetRHI()
: TStaticBlendStateWriteMask<CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE,CW_NONE>::GetRHI();
}
const FDepthStencilStateRHIParamRef DepthStencilStateRHI =
(bClearDepth && bClearStencil)
? TStaticDepthStencilState<
true, CF_Always,
true,CF_Always,SO_Replace,SO_Replace,SO_Replace,
false,CF_Always,SO_Replace,SO_Replace,SO_Replace,
0xff,0xff
>::GetRHI()
: bClearDepth
? TStaticDepthStencilState<true, CF_Always>::GetRHI()
: bClearStencil
? TStaticDepthStencilState<
false, CF_Always,
true,CF_Always,SO_Replace,SO_Replace,SO_Replace,
false,CF_Always,SO_Replace,SO_Replace,SO_Replace,
0xff,0xff
>::GetRHI()
: TStaticDepthStencilState<false, CF_Always>::GetRHI();
RHICmdList.SetRasterizerState(TStaticRasterizerState<FM_Solid, CM_None>::GetRHI());
RHICmdList.SetBlendState(BlendStateRHI);
RHICmdList.SetDepthStencilState(DepthStencilStateRHI);
auto ShaderMap = GetGlobalShaderMap(FeatureLevel);
// Set the new shaders
TShaderMapRef<TOneColorVS<true> > VertexShader(ShaderMap);
FOneColorPS* PixelShader = NULL;
// Set the shader to write to the appropriate number of render targets
// On AMD PC hardware, outputting to a color index in the shader without a matching render target set has a significant performance hit
if (NumClearColors <= 1)
{
TShaderMapRef<TOneColorPixelShaderMRT<1> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 2)
{
TShaderMapRef<TOneColorPixelShaderMRT<2> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 3)
{
TShaderMapRef<TOneColorPixelShaderMRT<3> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 4)
{
TShaderMapRef<TOneColorPixelShaderMRT<4> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 5)
{
TShaderMapRef<TOneColorPixelShaderMRT<5> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 6)
{
TShaderMapRef<TOneColorPixelShaderMRT<6> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 7)
{
TShaderMapRef<TOneColorPixelShaderMRT<7> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
else if (NumClearColors == 8)
{
TShaderMapRef<TOneColorPixelShaderMRT<8> > MRTPixelShader(ShaderMap);
PixelShader = *MRTPixelShader;
}
SetGlobalBoundShaderState(RHICmdList, FeatureLevel, GClearMRTBoundShaderState[FMath::Max(NumClearColors - 1, 0)], GetVertexDeclarationFVector4(), *VertexShader, PixelShader);
PixelShader->SetColors(RHICmdList, ClearColorArray, NumClearColors);
}
/**
* Clears view where Z is still at the maximum value (ie no geometry rendered)
*/
void FDeferredShadingSceneRenderer::ClearGBufferAtMaxZ()
{
// Assumes BeginRenderingSceneColor() has been called before this function
SCOPED_DRAW_EVENT(ClearGBufferAtMaxZ, DEC_SCENE_ITEMS);
// Clear the G Buffer render targets
const bool bClearBlack = Views[0].Family->EngineShowFlags.ShaderComplexity || Views[0].Family->EngineShowFlags.StationaryLightOverlap;
// Same clear color from RHIClearMRT
FLinearColor ClearColors[6] =
{bClearBlack ? FLinearColor(0,0,0,0) : Views[0].BackgroundColor, FLinearColor(0.5f,0.5f,0.5f,0), FLinearColor(0,0,0,1), FLinearColor(0,0,0,0), FLinearColor(0,1,1,1), FLinearColor(1,1,1,1)};
uint32 NumActiveRenderTargets = GSceneRenderTargets.GetNumGBufferTargets();
TShaderMapRef<FOneColorVS> VertexShader(GetGlobalShaderMap());
FOneColorPS* PixelShader = NULL;
// Assume for now all code path supports SM4, otherwise render target numbers are changed
switch(NumActiveRenderTargets)
{
case 5:
{
TShaderMapRef<TOneColorPixelShaderMRT<5> > MRTPixelShader(GetGlobalShaderMap());
PixelShader = *MRTPixelShader;
}
break;
case 6:
{
TShaderMapRef<TOneColorPixelShaderMRT<6> > MRTPixelShader(GetGlobalShaderMap());
PixelShader = *MRTPixelShader;
}
break;
default:
case 1:
{
TShaderMapRef<TOneColorPixelShaderMRT<1> > MRTPixelShader(GetGlobalShaderMap());
PixelShader = *MRTPixelShader;
}
break;
}
SetGlobalBoundShaderState(GClearMRTBoundShaderState[NumActiveRenderTargets - 1], GetVertexDeclarationFVector4(), *VertexShader, PixelShader);
// Opaque rendering, depth test but no depth writes
RHISetRasterizerState( TStaticRasterizerState<FM_Solid,CM_None>::GetRHI() );
RHISetBlendState(TStaticBlendStateWriteMask<>::GetRHI());
// Note, this is a reversed Z depth surface, using CF_GreaterEqual.
RHISetDepthStencilState(TStaticDepthStencilState<false,CF_GreaterEqual>::GetRHI());
// Clear each viewport by drawing background color at MaxZ depth
for(int32 ViewIndex = 0;ViewIndex < Views.Num();ViewIndex++)
{
SCOPED_CONDITIONAL_DRAW_EVENTF(EventView, Views.Num() > 1, DEC_SCENE_ITEMS, TEXT("ClearView%d"), ViewIndex);
FViewInfo& View = Views[ViewIndex];
// Set viewport for this view
RHISetViewport(View.ViewRect.Min.X, View.ViewRect.Min.Y, 0, View.ViewRect.Max.X, View.ViewRect.Max.Y, 1);
// Setup PS
SetShaderValueArray(PixelShader->GetPixelShader(),PixelShader->ColorParameter, ClearColors, NumActiveRenderTargets);
// Render quad
RHIDrawPrimitiveUP(PT_TriangleStrip, 2, ClearQuadVertices, sizeof(ClearQuadVertices[0]) );
}
}
