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LightSctrPostProcess.cpp
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LightSctrPostProcess.cpp
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/////////////////////////////////////////////////////////////////////////////////////////////
// Copyright 2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/////////////////////////////////////////////////////////////////////////////////////////////
#include "StdAfx.h"
#include "LightSctrPostProcess.h"
#include <atlcomcli.h>
#include <cassert>
#include <stdio.h>
#include "ShaderMacroHelper.h"
#define _USE_MATH_DEFINES
#include <math.h>
#ifndef V
#define V(x) { hr = (x); assert( SUCCEEDED(hr) ); }
#endif
#ifndef V_RETURN
#define V_RETURN(x) { hr = (x); assert( SUCCEEDED(hr) ); if( FAILED(hr) ) { return hr; } }
#endif
CLightSctrPostProcess :: CLightSctrPostProcess() :
m_uiSampleRefinementCSThreadGroupSize(0),
// Using small group size is inefficient because a lot of SIMD lanes become idle
m_uiSampleRefinementCSMinimumThreadGroupSize(128),// Must be greater than 32
m_fTurbidity(1.02f),
m_strEffectPath( L"fx\\LightScattering.fx" ),
m_bUseCombinedMinMaxTexture(false)
{
ComputeScatteringCoefficients();
}
CLightSctrPostProcess :: ~CLightSctrPostProcess()
{
}
HRESULT CLightSctrPostProcess :: OnCreateDevice(ID3D11Device* in_pd3dDevice,
ID3D11DeviceContext *in_pd3dDeviceContext)
{
HRESULT hr;
// Create depth stencil states
D3D11_DEPTH_STENCIL_DESC EnableDepthTestDSDesc;
ZeroMemory(&EnableDepthTestDSDesc, sizeof(EnableDepthTestDSDesc));
EnableDepthTestDSDesc.DepthEnable = TRUE;
EnableDepthTestDSDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ZERO;
EnableDepthTestDSDesc.DepthFunc = D3D11_COMPARISON_EQUAL;
V_RETURN( in_pd3dDevice->CreateDepthStencilState( &EnableDepthTestDSDesc, &m_pEnableDepthCmpEqDS) );
// Disable depth testing
D3D11_DEPTH_STENCIL_DESC DisableDepthTestDSDesc;
ZeroMemory(&DisableDepthTestDSDesc, sizeof(DisableDepthTestDSDesc));
DisableDepthTestDSDesc.DepthEnable = FALSE;
DisableDepthTestDSDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ZERO;
V_RETURN( in_pd3dDevice->CreateDepthStencilState( &DisableDepthTestDSDesc, &m_pDisableDepthTestDS) );
// Disable depth testing and always increment stencil value
// This depth stencil state is used to mark samples which will undergo further processing
// Pixel shader discards pixels which should not be further processed, thus keeping the
// stencil value untouched
// For instance, pixel shader performing epipolar coordinates generation discards all
// sampes, whoose coordinates are outside the screen [-1,1]x[-1,1] area
D3D11_DEPTH_STENCIL_DESC DisbaleDepthIncrStencilDSSDesc = DisableDepthTestDSDesc;
DisbaleDepthIncrStencilDSSDesc.StencilEnable = TRUE;
DisbaleDepthIncrStencilDSSDesc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
DisbaleDepthIncrStencilDSSDesc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_INCR;
DisbaleDepthIncrStencilDSSDesc.FrontFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
DisbaleDepthIncrStencilDSSDesc.FrontFace.StencilDepthFailOp = D3D11_STENCIL_OP_KEEP;
DisbaleDepthIncrStencilDSSDesc.BackFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
DisbaleDepthIncrStencilDSSDesc.BackFace.StencilPassOp = D3D11_STENCIL_OP_INCR;
DisbaleDepthIncrStencilDSSDesc.BackFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
DisbaleDepthIncrStencilDSSDesc.BackFace.StencilDepthFailOp = D3D11_STENCIL_OP_KEEP;
DisbaleDepthIncrStencilDSSDesc.StencilReadMask = D3D11_DEFAULT_STENCIL_READ_MASK;
DisbaleDepthIncrStencilDSSDesc.StencilWriteMask = D3D11_DEFAULT_STENCIL_WRITE_MASK;
V_RETURN( in_pd3dDevice->CreateDepthStencilState( &DisbaleDepthIncrStencilDSSDesc, &m_pDisableDepthTestIncrStencilDS) );
// Disable depth testing, stencil testing function equal, increment stencil
// This state is used to process only these pixels that were marked at the previous pass
// All pixels whith different stencil value are discarded from further processing as well
// as some pixels can also be discarded during the draw call
// For instance, pixel shader marking ray marching samples processes only these pixels which are inside
// the screen. It also discards all but these samples which are interpolated from themselves
D3D11_DEPTH_STENCIL_DESC DisbaleDepthStencilEqualIncrStencilDSSDesc = DisbaleDepthIncrStencilDSSDesc;
DisbaleDepthStencilEqualIncrStencilDSSDesc.FrontFace.StencilFunc = D3D11_COMPARISON_EQUAL;
DisbaleDepthStencilEqualIncrStencilDSSDesc.BackFace.StencilFunc = D3D11_COMPARISON_EQUAL;
V_RETURN( in_pd3dDevice->CreateDepthStencilState( &DisbaleDepthStencilEqualIncrStencilDSSDesc, &m_pNoDepth_StEqual_IncrStencilDS) );
D3D11_DEPTH_STENCIL_DESC DisbaleDepthStencilEqualKeepStencilDSSDesc = DisbaleDepthStencilEqualIncrStencilDSSDesc;
DisbaleDepthStencilEqualKeepStencilDSSDesc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
DisbaleDepthStencilEqualKeepStencilDSSDesc.BackFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
V_RETURN( in_pd3dDevice->CreateDepthStencilState( &DisbaleDepthStencilEqualKeepStencilDSSDesc, &m_pNoDepth_StEqual_KeepStencilDS) );
// Create rasterizer state
D3D11_RASTERIZER_DESC SolidFillNoCullRSDesc;
ZeroMemory(&SolidFillNoCullRSDesc, sizeof(SolidFillNoCullRSDesc));
SolidFillNoCullRSDesc.FillMode = D3D11_FILL_SOLID;
SolidFillNoCullRSDesc.CullMode = D3D11_CULL_NONE;
V_RETURN( in_pd3dDevice->CreateRasterizerState( &SolidFillNoCullRSDesc, &m_pSolidFillNoCullRS) );
// Create default blend state
D3D11_BLEND_DESC DefaultBlendStateDesc;
ZeroMemory(&DefaultBlendStateDesc, sizeof(DefaultBlendStateDesc));
DefaultBlendStateDesc.IndependentBlendEnable = FALSE;
for(int i=0; i< _countof(DefaultBlendStateDesc.RenderTarget); i++)
DefaultBlendStateDesc.RenderTarget[i].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
V_RETURN( in_pd3dDevice->CreateBlendState( &DefaultBlendStateDesc, &m_pDefaultBS) );
D3D11_BLEND_DESC AdditiveBlendStateDesc;
ZeroMemory(&AdditiveBlendStateDesc, sizeof(AdditiveBlendStateDesc));
AdditiveBlendStateDesc.IndependentBlendEnable = FALSE;
for(int i=0; i< _countof(AdditiveBlendStateDesc.RenderTarget); i++)
AdditiveBlendStateDesc.RenderTarget[i].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
AdditiveBlendStateDesc.RenderTarget[0].BlendEnable = TRUE;
AdditiveBlendStateDesc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
AdditiveBlendStateDesc.RenderTarget[0].BlendOpAlpha= D3D11_BLEND_OP_ADD;
AdditiveBlendStateDesc.RenderTarget[0].DestBlend = D3D11_BLEND_ONE;
AdditiveBlendStateDesc.RenderTarget[0].DestBlendAlpha= D3D11_BLEND_ONE;
AdditiveBlendStateDesc.RenderTarget[0].SrcBlend = D3D11_BLEND_ONE;
AdditiveBlendStateDesc.RenderTarget[0].SrcBlendAlpha= D3D11_BLEND_ONE;
V_RETURN( in_pd3dDevice->CreateBlendState( &AdditiveBlendStateDesc, &m_pAdditiveBlendBS) );
D3D11_BLEND_DESC AlphaBlendStateDesc = AdditiveBlendStateDesc;
AlphaBlendStateDesc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
AlphaBlendStateDesc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_SRC_ALPHA;
AlphaBlendStateDesc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
AlphaBlendStateDesc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
V_RETURN( in_pd3dDevice->CreateBlendState( &AlphaBlendStateDesc, &m_pAlphaBlendBS) );
// Create samplers
D3D11_SAMPLER_DESC SamLinearBorder0Desc =
{
D3D11_FILTER_MIN_MAG_MIP_LINEAR,
D3D11_TEXTURE_ADDRESS_BORDER,
D3D11_TEXTURE_ADDRESS_BORDER,
D3D11_TEXTURE_ADDRESS_BORDER,
0, //FLOAT MipLODBias;
0, //UINT MaxAnisotropy;
D3D11_COMPARISON_NEVER, // D3D11_COMPARISON_FUNC ComparisonFunc;
{0.f, 0.f, 0.f, 0.f}, //FLOAT BorderColor[ 4 ];
-FLT_MAX, //FLOAT MinLOD;
+FLT_MAX //FLOAT MaxLOD;
};
V_RETURN( in_pd3dDevice->CreateSamplerState( &SamLinearBorder0Desc, &m_psamLinearBorder0) );
D3D11_SAMPLER_DESC SamLinearClampDesc =
{
D3D11_FILTER_MIN_MAG_MIP_LINEAR,
D3D11_TEXTURE_ADDRESS_CLAMP,
D3D11_TEXTURE_ADDRESS_CLAMP,
D3D11_TEXTURE_ADDRESS_CLAMP,
0, //FLOAT MipLODBias;
0, //UINT MaxAnisotropy;
D3D11_COMPARISON_NEVER, // D3D11_COMPARISON_FUNC ComparisonFunc;
{0.f, 0.f, 0.f, 0.f}, //FLOAT BorderColor[ 4 ];
-FLT_MAX, //FLOAT MinLOD;
+FLT_MAX //FLOAT MaxLOD;
};
V_RETURN( in_pd3dDevice->CreateSamplerState( &SamLinearClampDesc, &m_psamLinearClamp) );
D3D11_SAMPLER_DESC SamPointClampDesc = SamLinearClampDesc;
SamPointClampDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_POINT;
V_RETURN( in_pd3dDevice->CreateSamplerState( &SamPointClampDesc, &m_psamPointClamp) );
D3D11_SAMPLER_DESC SamComparisonDesc =
{
D3D11_FILTER_COMPARISON_MIN_MAG_LINEAR_MIP_POINT,
D3D11_TEXTURE_ADDRESS_BORDER,
D3D11_TEXTURE_ADDRESS_BORDER,
D3D11_TEXTURE_ADDRESS_BORDER,
0, //FLOAT MipLODBias;
0, //UINT MaxAnisotropy;
D3D11_COMPARISON_GREATER, // D3D11_COMPARISON_FUNC ComparisonFunc;
{0.f, 0.f, 0.f, 0.f}, //FLOAT BorderColor[ 4 ];
-FLT_MAX, //FLOAT MinLOD;
+FLT_MAX //FLOAT MaxLOD;
};
V_RETURN( in_pd3dDevice->CreateSamplerState( &SamComparisonDesc, &m_psamComparison) );
// Create constant buffers
D3D11_BUFFER_DESC CBDesc =
{
sizeof(SCameraAttribs),
D3D11_USAGE_DYNAMIC,
D3D11_BIND_CONSTANT_BUFFER,
D3D11_CPU_ACCESS_WRITE, //UINT CPUAccessFlags
0, //UINT MiscFlags;
0, //UINT StructureByteStride;
};
V_RETURN( in_pd3dDevice->CreateBuffer( &CBDesc, NULL, &m_pcbCameraAttribs) );
//CBDesc.ByteWidth = sizeof(SLightAttribs);
//V_RETURN( in_pd3dDevice->CreateBuffer( &CBDesc, NULL, &m_pcbLightAttribs) );
CBDesc.ByteWidth = sizeof(SPostProcessingAttribs);
V_RETURN( in_pd3dDevice->CreateBuffer( &CBDesc, NULL, &m_pcbPostProcessingAttribs) );
CBDesc.ByteWidth = sizeof(SMiscDynamicParams);
V_RETURN( in_pd3dDevice->CreateBuffer( &CBDesc, NULL, &m_pcbMiscParams) );
CBDesc.ByteWidth = sizeof(SAirScatteringAttribs);
CBDesc.Usage = D3D11_USAGE_DEFAULT;
CBDesc.CPUAccessFlags = 0;
D3D11_SUBRESOURCE_DATA InitData =
{
&m_MediaParams,
0, // UINT SysMemPitch
0 // UINT SysMemSlicePitch
};
V_RETURN( in_pd3dDevice->CreateBuffer( &CBDesc, &InitData, &m_pcbMediaAttribs) );
CRenderTechnique GenerateScreenSizeQuadTech;
GenerateScreenSizeQuadTech.SetDeviceAndContext( in_pd3dDevice, in_pd3dDeviceContext );
V( GenerateScreenSizeQuadTech.CreateVertexShaderFromFile(m_strEffectPath, "GenerateScreenSizeQuadVS", NULL ) );
m_pGenerateScreenSizeQuadVS = GenerateScreenSizeQuadTech.GetVS();
CreatePrecomputedOpticalDepthTexture(in_pd3dDevice, in_pd3dDeviceContext);
return S_OK;
}
void CLightSctrPostProcess :: OnDestroyDevice()
{
m_ptex2DSliceEndpointsSRV.Release();
m_ptex2DSliceEndpointsRTV.Release();
m_ptex2DCoordinateTextureSRV.Release();
m_ptex2DCoordinateTextureRTV.Release();
m_ptex2DEpipolarImageDSV.Release();
m_ptex2DInterpolationSourcesSRV.Release();
m_ptex2DInterpolationSourcesUAV.Release();
m_ptex2DEpipolarCamSpaceZSRV.Release();
m_ptex2DEpipolarCamSpaceZRTV.Release();
m_ptex2DEpipolarInscatteringSRV.Release();
m_ptex2DEpipolarInscatteringRTV.Release();
m_ptex2DEpipolarExtinctionSRV.Release();
m_ptex2DEpipolarExtinctionRTV.Release();
m_ptex2DInitialScatteredLightSRV.Release();
m_ptex2DInitialScatteredLightRTV.Release();
m_ptex2DScreenSizeDSV.Release();
m_ptex2DCameraSpaceZRTV.Release();
m_ptex2DCameraSpaceZSRV.Release();
for(int i=0; i < _countof(m_ptex2DMinMaxShadowMapSRV); ++i)
m_ptex2DMinMaxShadowMapSRV[i].Release();
for(int i=0; i < _countof(m_ptex2DMinMaxShadowMapRTV); ++i)
m_ptex2DMinMaxShadowMapRTV[i].Release();
m_ptex2DSliceUVDirAndOriginSRV.Release();
m_ptex2DSliceUVDirAndOriginRTV.Release();
m_ptex2DOccludedNetDensityToAtmTopSRV.Release();
m_ptex2DOccludedNetDensityToAtmTopRTV.Release();
m_ptex3DSingleScatteringSRV.Release();
m_ptex3DHighOrderScatteringSRV.Release();
m_ptex3DMultipleScatteringSRV.Release();
m_ptex2DLowResLuminanceSRV.Release();
m_ptex2DLowResLuminanceRTV.Release();
m_ptex2DAverageLuminanceRTV.Release();
m_ptex2DAverageLuminanceSRV.Release();
m_ptex2DAmbientSkyLightRTV.Release();
m_ptex2DAmbientSkyLightSRV.Release();
m_ptex2DSphereRandomSamplingSRV.Release();
m_psamLinearClamp.Release();
m_psamLinearBorder0.Release();
m_psamComparison.Release();
m_psamPointClamp.Release();
m_ReconstrCamSpaceZTech.Release();
m_RendedSliceEndpointsTech.Release();
m_RendedCoordTexTech.Release();
m_RefineSampleLocationsTech.Release();
m_RenderCoarseUnshadowedInsctrTech.Release();
m_MarkRayMarchingSamplesInStencilTech.Release();
m_RenderSliceUVDirInSMTech.Release();
m_InitializeMinMaxShadowMapTech.Release();
m_ComputeMinMaxSMLevelTech.Release();
m_DoRayMarchTech[0].Release();
m_DoRayMarchTech[1].Release();
m_InterpolateIrradianceTech.Release();
m_UnwarpEpipolarSctrImgTech.Release();
m_UnwarpAndRenderLuminanceTech.Release();
m_UpdateAverageLuminanceTech.Release();
for(size_t i=0; i<_countof(m_FixInsctrAtDepthBreaksTech); ++i)
m_FixInsctrAtDepthBreaksTech[i].Release();
m_RenderSampleLocationsTech.Release();
m_RenderSunTech.Release();
m_PrecomputeSingleSctrTech.Release();
m_ComputeSctrRadianceTech.Release();
m_ComputeScatteringOrderTech.Release();
m_AddScatteringOrderTech.Release();
m_pGenerateScreenSizeQuadVS.Release();
m_pEnableDepthCmpEqDS.Release();
m_pDisableDepthTestDS.Release();
m_pDisableDepthTestIncrStencilDS.Release();
m_pNoDepth_StEqual_IncrStencilDS.Release();
m_pNoDepth_StEqual_KeepStencilDS.Release();
m_pSolidFillNoCullRS.Release();
m_pDefaultBS.Release();
m_pAdditiveBlendBS.Release();
m_pAlphaBlendBS.Release();
m_pcbCameraAttribs.Release();
//m_pcbLightAttribs.Release();
m_pcbPostProcessingAttribs.Release();
m_pcbMediaAttribs.Release();
m_pcbMiscParams.Release();
}
HRESULT CLightSctrPostProcess :: OnResizedSwapChain(ID3D11Device* pd3dDevice, UINT uiBackBufferWidth, UINT uiBackBufferHeight)
{
m_uiBackBufferWidth = uiBackBufferWidth;
m_uiBackBufferHeight = uiBackBufferHeight;
D3D11_TEXTURE2D_DESC ScreenSizeDepthStencilTexDesc =
{
uiBackBufferWidth, //UINT Width;
uiBackBufferHeight, //UINT Height;
1, //UINT MipLevels;
1, //UINT ArraySize;
DXGI_FORMAT_D24_UNORM_S8_UINT, //DXGI_FORMAT Format;
{1,0}, //DXGI_SAMPLE_DESC SampleDesc;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_DEPTH_STENCIL, //UINT BindFlags;
0, //UINT CPUAccessFlags;
0, //UINT MiscFlags;
};
m_ptex2DScreenSizeDSV.Release();
CComPtr<ID3D11Texture2D> ptex2DScreenSizeDepthStencil;
// Create 2-D texture, shader resource and target view buffers on the device
HRESULT hr;
V_RETURN( pd3dDevice->CreateTexture2D( &ScreenSizeDepthStencilTexDesc, NULL, &ptex2DScreenSizeDepthStencil) );
V_RETURN( pd3dDevice->CreateDepthStencilView( ptex2DScreenSizeDepthStencil, NULL, &m_ptex2DScreenSizeDSV) );
m_ptex2DCameraSpaceZRTV.Release();
m_ptex2DCameraSpaceZSRV.Release();
D3D11_TEXTURE2D_DESC CamSpaceZTexDesc = ScreenSizeDepthStencilTexDesc;
CamSpaceZTexDesc.Format = DXGI_FORMAT_R32_FLOAT;
CamSpaceZTexDesc.BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;
CComPtr<ID3D11Texture2D> ptex2DCamSpaceZ;
V_RETURN( pd3dDevice->CreateTexture2D( &CamSpaceZTexDesc, NULL, &ptex2DCamSpaceZ) );
V_RETURN( pd3dDevice->CreateShaderResourceView( ptex2DCamSpaceZ, NULL, &m_ptex2DCameraSpaceZSRV) );
V_RETURN( pd3dDevice->CreateRenderTargetView( ptex2DCamSpaceZ, NULL, &m_ptex2DCameraSpaceZRTV) );
m_RendedSliceEndpointsTech.Release();
m_RendedCoordTexTech.Release();
m_RenderSliceUVDirInSMTech.Release();
m_RenderSampleLocationsTech.Release();
m_UnwarpEpipolarSctrImgTech.Release();
m_UnwarpAndRenderLuminanceTech.Release();
return S_OK;
}
static void UnbindResources(ID3D11DeviceContext *pDeviceCtx)
{
ID3D11ShaderResourceView *pDummySRVs[12]={NULL};
ID3D11UnorderedAccessView *pDummyUAVs[8]={NULL};
pDeviceCtx->PSSetShaderResources(0, _countof(pDummySRVs), pDummySRVs);
pDeviceCtx->VSSetShaderResources(0, _countof(pDummySRVs), pDummySRVs);
pDeviceCtx->GSSetShaderResources(0, _countof(pDummySRVs), pDummySRVs);
pDeviceCtx->CSSetShaderResources(0, _countof(pDummySRVs), pDummySRVs);
pDeviceCtx->CSSetUnorderedAccessViews(0, _countof(pDummyUAVs), pDummyUAVs, NULL);
}
static void RenderQuad(ID3D11DeviceContext *pd3dDeviceCtx,
CRenderTechnique &State,
int iWidth = 0, int iHeight = 0,
int iTopLeftX = 0, int iTopLeftY = 0,
int iNumInstances = 1)
{
// Initialize the viewport
if( !iWidth && !iHeight )
{
assert( iTopLeftX == 0 && iTopLeftY == 0 );
CComPtr<ID3D11RenderTargetView> pRTV;
pd3dDeviceCtx->OMGetRenderTargets(1, &pRTV, NULL);
CComPtr<ID3D11Resource> pDstTex;
pRTV->GetResource( &pDstTex );
D3D11_TEXTURE2D_DESC DstTexDesc;
CComQIPtr<ID3D11Texture2D>(pDstTex)->GetDesc( &DstTexDesc );
iWidth = DstTexDesc.Width;
iHeight = DstTexDesc.Height;
}
D3D11_VIEWPORT NewViewPort;
NewViewPort.TopLeftX = static_cast<float>( iTopLeftX );
NewViewPort.TopLeftY = static_cast<float>( iTopLeftY );
NewViewPort.Width = static_cast<float>( iWidth );
NewViewPort.Height = static_cast<float>( iHeight );
NewViewPort.MinDepth = 0;
NewViewPort.MaxDepth = 1;
// Set the viewport
pd3dDeviceCtx->RSSetViewports(1, &NewViewPort);
UINT offset[1] = {0};
UINT stride[1] = {0};
ID3D11Buffer *ppBuffers[1] = {0};
pd3dDeviceCtx->IASetVertexBuffers(0, 1, ppBuffers, stride, offset);
// There is no input-layout object and the primitive topology is triangle strip
pd3dDeviceCtx->IASetInputLayout(NULL);
pd3dDeviceCtx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
State.Apply();
if( iNumInstances == 1 )
{
// Draw 4 vertices (two triangles )
pd3dDeviceCtx->Draw(4, 0);
}
else
{
// Draw 4 vertices (two triangles ) x number of instances
pd3dDeviceCtx->DrawInstanced(4, iNumInstances, 0, 0);
}
// Unbind resources
UnbindResources( pd3dDeviceCtx );
}
void CLightSctrPostProcess :: DefineMacros(class CD3DShaderMacroHelper &Macros)
{
Macros.AddShaderMacro("NUM_EPIPOLAR_SLICES", m_PostProcessingAttribs.m_uiNumEpipolarSlices);
Macros.AddShaderMacro("MAX_SAMPLES_IN_SLICE", m_PostProcessingAttribs.m_uiMaxSamplesInSlice);
Macros.AddShaderMacro("OPTIMIZE_SAMPLE_LOCATIONS", m_PostProcessingAttribs.m_bOptimizeSampleLocations);
Macros.AddShaderMacro("USE_COMBINED_MIN_MAX_TEXTURE", m_bUseCombinedMinMaxTexture );
Macros.AddShaderMacro("EXTINCTION_EVAL_MODE", m_PostProcessingAttribs.m_uiExtinctionEvalMode );
Macros.AddShaderMacro("ENABLE_LIGHT_SHAFTS", m_PostProcessingAttribs.m_bEnableLightShafts);
Macros.AddShaderMacro("MULTIPLE_SCATTERING_MODE", m_PostProcessingAttribs.m_uiMultipleScatteringMode);
Macros.AddShaderMacro("SINGLE_SCATTERING_MODE", m_PostProcessingAttribs.m_uiSingleScatteringMode);
{
std::stringstream ss;
ss<<"float2("<<m_uiBackBufferWidth<<","<<m_uiBackBufferHeight<<")";
Macros.AddShaderMacro("SCREEN_RESLOUTION", ss.str());
}
{
std::stringstream ss;
ss<<"float4("<<sm_iPrecomputedSctrUDim<<","
<<sm_iPrecomputedSctrVDim<<","
<<sm_iPrecomputedSctrWDim<<","
<<sm_iPrecomputedSctrQDim<<")";
Macros.AddShaderMacro("PRECOMPUTED_SCTR_LUT_DIM", ss.str());
}
Macros.AddShaderMacro("EARTH_RADIUS", m_MediaParams.fEarthRadius);
Macros.AddShaderMacro("ATM_TOP_HEIGHT", m_MediaParams.fAtmTopHeight);
Macros.AddShaderMacro("ATM_TOP_RADIUS", m_MediaParams.fAtmTopRadius);
{
std::stringstream ss;
ss<<"float2("<<m_MediaParams.f2ParticleScaleHeight.x<<","<<m_MediaParams.f2ParticleScaleHeight.y<<")";
Macros.AddShaderMacro("PARTICLE_SCALE_HEIGHT", ss.str());
}
}
HRESULT CLightSctrPostProcess::CreatePrecomputedOpticalDepthTexture(ID3D11Device* in_pd3dDevice,
ID3D11DeviceContext *in_pd3dDeviceContext)
{
HRESULT hr;
CRenderTechnique PrecomputeNetDensityToAtmTopTech;
PrecomputeNetDensityToAtmTopTech.SetDeviceAndContext(in_pd3dDevice, in_pd3dDeviceContext);
CD3DShaderMacroHelper Macros;
Macros.Finalize();
PrecomputeNetDensityToAtmTopTech.CreatePixelShaderFromFile( m_strEffectPath, "PrecomputeNetDensityToAtmTopPS", Macros );
PrecomputeNetDensityToAtmTopTech.SetVS( m_pGenerateScreenSizeQuadVS );
PrecomputeNetDensityToAtmTopTech.SetDS( m_pDisableDepthTestDS, 0 );
PrecomputeNetDensityToAtmTopTech.SetRS( m_pSolidFillNoCullRS );
PrecomputeNetDensityToAtmTopTech.SetBS( m_pDefaultBS );
D3D11_TEXTURE2D_DESC NetDensityToAtmTopTexDesc =
{
sm_iNumPrecomputedHeights, //UINT Width;
sm_iNumPrecomputedAngles, //UINT Height;
1, //UINT MipLevels;
1, //UINT ArraySize;
DXGI_FORMAT_R32G32_FLOAT, //DXGI_FORMAT Format;
{1,0}, //DXGI_SAMPLE_DESC SampleDesc;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET, //UINT BindFlags;
0, //UINT CPUAccessFlags;
0, //UINT MiscFlags;
};
m_ptex2DOccludedNetDensityToAtmTopSRV.Release();
m_ptex2DOccludedNetDensityToAtmTopRTV.Release();
CComPtr<ID3D11Texture2D> ptex2DOccludedNetDensityToAtmTop;
V_RETURN( in_pd3dDevice->CreateTexture2D( &NetDensityToAtmTopTexDesc, NULL, &ptex2DOccludedNetDensityToAtmTop) );
V_RETURN( in_pd3dDevice->CreateShaderResourceView( ptex2DOccludedNetDensityToAtmTop, NULL, &m_ptex2DOccludedNetDensityToAtmTopSRV) );
V_RETURN( in_pd3dDevice->CreateRenderTargetView( ptex2DOccludedNetDensityToAtmTop, NULL, &m_ptex2DOccludedNetDensityToAtmTopRTV) );
ID3D11RenderTargetView *pRTVs[] = { m_ptex2DOccludedNetDensityToAtmTopRTV };
in_pd3dDeviceContext->OMSetRenderTargets(_countof(pRTVs), pRTVs, NULL);
ID3D11Buffer *pCBs[] = {m_pcbMediaAttribs};
in_pd3dDeviceContext->PSSetConstantBuffers(1, _countof(pCBs), pCBs);
RenderQuad(in_pd3dDeviceContext, PrecomputeNetDensityToAtmTopTech);
in_pd3dDeviceContext->OMSetRenderTargets(0, NULL, NULL);
return S_OK;
}
void CLightSctrPostProcess :: CreateRandomSphereSamplingTexture(ID3D11Device *pDevice)
{
D3D11_TEXTURE2D_DESC RandomSphereSamplingTexDesc =
{
sm_iNumRandomSamplesOnSphere, //UINT Width;
1, //UINT Height;
1, //UINT MipLevels;
1, //UINT ArraySize;
DXGI_FORMAT_R32G32B32A32_FLOAT, //DXGI_FORMAT Format;
{1,0}, //DXGI_SAMPLE_DESC SampleDesc;
D3D11_USAGE_IMMUTABLE, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE, //UINT BindFlags;
0, //UINT CPUAccessFlags;
0, //UINT MiscFlags;
};
std::vector<D3DXVECTOR4> SphereSampling(sm_iNumRandomSamplesOnSphere);
for(int iSample = 0; iSample < sm_iNumRandomSamplesOnSphere; ++iSample)
{
D3DXVECTOR4 &f4Sample = SphereSampling[iSample];
f4Sample.z = ((float)rand()/(float)RAND_MAX) * 2.f - 1.f;
float t = ((float)rand()/(float)RAND_MAX) * 2.f * PI;
float r = sqrt( max(1 - f4Sample.z*f4Sample.z, 0.f) );
f4Sample.x = r * cos(t);
f4Sample.y = r * sin(t);
f4Sample.w = 0;
}
D3D11_SUBRESOURCE_DATA InitData =
{
&SphereSampling[0],
sm_iNumRandomSamplesOnSphere*sizeof(D3DXVECTOR4), // UINT SysMemPitch
0 // UINT SysMemSlicePitch
};
HRESULT hr;
CComPtr<ID3D11Texture2D> ptex2DSphereRandomSampling;
V( pDevice->CreateTexture2D( &RandomSphereSamplingTexDesc, &InitData, &ptex2DSphereRandomSampling) );
V( pDevice->CreateShaderResourceView( ptex2DSphereRandomSampling, NULL, &m_ptex2DSphereRandomSamplingSRV) );
}
HRESULT CLightSctrPostProcess :: CreatePrecomputedScatteringLUT(ID3D11Device *pDevice, ID3D11DeviceContext *pContext)
{
HRESULT hr;
if( !m_PrecomputeSingleSctrTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_PrecomputeSingleSctrTech.SetDeviceAndContext(pDevice, pContext);
m_PrecomputeSingleSctrTech.CreatePixelShaderFromFile( m_strEffectPath, "PrecomputeSingleScatteringPS", Macros );
m_PrecomputeSingleSctrTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_PrecomputeSingleSctrTech.SetDS( m_pDisableDepthTestDS );
m_PrecomputeSingleSctrTech.SetRS( m_pSolidFillNoCullRS );
m_PrecomputeSingleSctrTech.SetBS( m_pDefaultBS );
}
if( !m_ComputeSctrRadianceTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.AddShaderMacro( "NUM_RANDOM_SPHERE_SAMPLES", sm_iNumRandomSamplesOnSphere );
Macros.Finalize();
m_ComputeSctrRadianceTech.SetDeviceAndContext(pDevice, pContext);
m_ComputeSctrRadianceTech.CreatePixelShaderFromFile( m_strEffectPath, "ComputeSctrRadiancePS", Macros );
m_ComputeSctrRadianceTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_ComputeSctrRadianceTech.SetDS( m_pDisableDepthTestDS );
m_ComputeSctrRadianceTech.SetRS( m_pSolidFillNoCullRS );
m_ComputeSctrRadianceTech.SetBS( m_pDefaultBS );
}
if( !m_ComputeScatteringOrderTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_ComputeScatteringOrderTech.SetDeviceAndContext(pDevice, pContext);
m_ComputeScatteringOrderTech.CreatePixelShaderFromFile( m_strEffectPath, "ComputeScatteringOrderPS", Macros );
m_ComputeScatteringOrderTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_ComputeScatteringOrderTech.SetDS( m_pDisableDepthTestDS );
m_ComputeScatteringOrderTech.SetRS( m_pSolidFillNoCullRS );
m_ComputeScatteringOrderTech.SetBS( m_pDefaultBS );
}
if( !m_AddScatteringOrderTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_AddScatteringOrderTech.SetDeviceAndContext(pDevice, pContext);
m_AddScatteringOrderTech.CreatePixelShaderFromFile( m_strEffectPath, "AddScatteringOrderPS", Macros );
m_AddScatteringOrderTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_AddScatteringOrderTech.SetDS( m_pDisableDepthTestDS );
m_AddScatteringOrderTech.SetRS( m_pSolidFillNoCullRS );
m_AddScatteringOrderTech.SetBS( m_pAdditiveBlendBS );
}
if( !m_ptex2DSphereRandomSamplingSRV )
CreateRandomSphereSamplingTexture(pDevice);
m_ptex3DSingleScatteringSRV.Release();
m_ptex3DHighOrderScatteringSRV.Release();
m_ptex3DMultipleScatteringSRV.Release();
D3D11_TEXTURE3D_DESC PrecomputedSctrTexDesc =
{
sm_iPrecomputedSctrUDim, //UINT Width;
sm_iPrecomputedSctrVDim, //UINT Height;
sm_iPrecomputedSctrWDim * sm_iPrecomputedSctrQDim, //UINT Depth;
1, //UINT MipLevels;
DXGI_FORMAT_R16G16B16A16_FLOAT,//DXGI_FORMAT Format;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE,//UINT BindFlags;
0,//UINT CPUAccessFlags;
0//UINT MiscFlags;
};
CComPtr<ID3D11Texture3D> ptex3DSingleSctr, ptex3DHighOrderSctr, ptex3DMultipleSctr;
V_RETURN(pDevice->CreateTexture3D(&PrecomputedSctrTexDesc, NULL, &ptex3DSingleSctr));
V_RETURN(pDevice->CreateShaderResourceView(ptex3DSingleSctr, NULL, &m_ptex3DSingleScatteringSRV));
V_RETURN(pDevice->CreateTexture3D(&PrecomputedSctrTexDesc, NULL, &ptex3DHighOrderSctr));
V_RETURN(pDevice->CreateShaderResourceView(ptex3DHighOrderSctr, NULL, &m_ptex3DHighOrderScatteringSRV));
V_RETURN(pDevice->CreateTexture3D(&PrecomputedSctrTexDesc, NULL, &ptex3DMultipleSctr));
V_RETURN(pDevice->CreateShaderResourceView(ptex3DMultipleSctr, NULL, &m_ptex3DMultipleScatteringSRV));
std::vector< CComPtr<ID3D11RenderTargetView> > ptex3DHighOrderSctrRTVs(PrecomputedSctrTexDesc.Depth);
std::vector< CComPtr<ID3D11RenderTargetView> > ptex3DMultipleSctrRTVs(PrecomputedSctrTexDesc.Depth);
// Precompute single scattering
for(UINT uiDepthSlice = 0; uiDepthSlice < PrecomputedSctrTexDesc.Depth; ++uiDepthSlice)
{
D3D11_RENDER_TARGET_VIEW_DESC CurrSliceRTVDesc;
CurrSliceRTVDesc.Format = PrecomputedSctrTexDesc.Format;
CurrSliceRTVDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE3D;
CurrSliceRTVDesc.Texture3D.MipSlice = 0;
CurrSliceRTVDesc.Texture3D.FirstWSlice = uiDepthSlice;
CurrSliceRTVDesc.Texture3D.WSize = 1;
CComPtr<ID3D11RenderTargetView> ptex3DCurrDepthSliceRTV;
V_RETURN(pDevice->CreateRenderTargetView(ptex3DSingleSctr, &CurrSliceRTVDesc, &ptex3DCurrDepthSliceRTV));
V_RETURN(pDevice->CreateRenderTargetView(ptex3DHighOrderSctr, &CurrSliceRTVDesc, &ptex3DHighOrderSctrRTVs[uiDepthSlice]));
float Zero[] = {0.f, 0.f, 0.f, 0.f};
pContext->ClearRenderTargetView(ptex3DHighOrderSctrRTVs[uiDepthSlice].p, Zero);
V_RETURN(pDevice->CreateRenderTargetView(ptex3DMultipleSctr, &CurrSliceRTVDesc, &ptex3DMultipleSctrRTVs[uiDepthSlice]));
pContext->OMSetRenderTargets(1, &ptex3DCurrDepthSliceRTV.p, NULL);
ID3D11ShaderResourceView *pSRVs[] =
{
m_ptex2DOccludedNetDensityToAtmTopSRV // Texture2D<float2> g_tex2DOccludedNetDensityToAtmTop : register( t5 );
};
pContext->PSSetShaderResources(5, _countof(pSRVs), pSRVs);
// Set sun zenith and sun view angles
SMiscDynamicParams MiscDynamicParams = {NULL};
UINT uiW = uiDepthSlice % sm_iPrecomputedSctrWDim;
UINT uiQ = uiDepthSlice / sm_iPrecomputedSctrWDim;
MiscDynamicParams.f2WQ.x = ((float)uiW + 0.5f) / (float)sm_iPrecomputedSctrWDim;
assert(0 < MiscDynamicParams.f2WQ.x && MiscDynamicParams.f2WQ.x < 1);
MiscDynamicParams.f2WQ.y = ((float)uiQ + 0.5f) / (float)sm_iPrecomputedSctrQDim;
assert(0 < MiscDynamicParams.f2WQ.y && MiscDynamicParams.f2WQ.y < 1);
UpdateConstantBuffer(pContext, m_pcbMiscParams, &MiscDynamicParams, sizeof(MiscDynamicParams));
//cbuffer cbMiscDynamicParams : register( b4 )
pContext->PSSetConstantBuffers(4, 1, &m_pcbMiscParams.p);
RenderQuad( pContext,
m_PrecomputeSingleSctrTech,
PrecomputedSctrTexDesc.Width, PrecomputedSctrTexDesc.Height );
}
// Precompute multiple scattering
// We need higher precision to store intermediate data
PrecomputedSctrTexDesc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
CComPtr<ID3D11Texture3D> ptex3DSctrRadiance, ptex3DInsctrOrder;
CComPtr<ID3D11ShaderResourceView> ptex3DSctrRadianceSRV, ptex3DInsctrOrderSRV;
V_RETURN(pDevice->CreateTexture3D(&PrecomputedSctrTexDesc, NULL, &ptex3DSctrRadiance));
V_RETURN(pDevice->CreateTexture3D(&PrecomputedSctrTexDesc, NULL, &ptex3DInsctrOrder));
V_RETURN(pDevice->CreateShaderResourceView(ptex3DSctrRadiance, NULL, &ptex3DSctrRadianceSRV));
V_RETURN(pDevice->CreateShaderResourceView(ptex3DInsctrOrder, NULL, &ptex3DInsctrOrderSRV));
std::vector< CComPtr<ID3D11RenderTargetView> > ptex3DSctrRadianceRTVs(PrecomputedSctrTexDesc.Depth), ptex3DInsctrOrderRTVs(PrecomputedSctrTexDesc.Depth);
for(UINT uiDepthSlice = 0; uiDepthSlice < PrecomputedSctrTexDesc.Depth; ++uiDepthSlice)
{
D3D11_RENDER_TARGET_VIEW_DESC CurrSliceRTVDesc;
CurrSliceRTVDesc.Format = PrecomputedSctrTexDesc.Format;
CurrSliceRTVDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE3D;
CurrSliceRTVDesc.Texture3D.MipSlice = 0;
CurrSliceRTVDesc.Texture3D.FirstWSlice = uiDepthSlice;
CurrSliceRTVDesc.Texture3D.WSize = 1;
V_RETURN(pDevice->CreateRenderTargetView(ptex3DSctrRadiance, &CurrSliceRTVDesc, &ptex3DSctrRadianceRTVs[uiDepthSlice]));
V_RETURN(pDevice->CreateRenderTargetView(ptex3DInsctrOrder, &CurrSliceRTVDesc, &ptex3DInsctrOrderRTVs[uiDepthSlice]));
}
const int iNumScatteringOrders = 4;
for(int iSctrOrder = 1; iSctrOrder < iNumScatteringOrders; ++iSctrOrder)
{
for(int iPass = 0; iPass < 3; ++iPass)
{
pContext->OMSetRenderTargets(0, NULL, NULL);
// Pass 0: compute differential in-scattering
// Pass 1: integrate differential in-scattering
// Pass 2: accumulate total multiple scattering
ID3D11ShaderResourceView *pSRVs[2] = {nullptr};
CRenderTechnique *pRenderTech = nullptr;
std::vector< CComPtr<ID3D11RenderTargetView> > *pRTVs;
switch(iPass)
{
case 0:
// Pre-compute the radiance of light scattered at a given point in given direction.
pRenderTech = &m_ComputeSctrRadianceTech;
pRTVs = &ptex3DSctrRadianceRTVs;
pSRVs[0] = (iSctrOrder == 1) ? m_ptex3DSingleScatteringSRV : ptex3DInsctrOrderSRV;
pSRVs[1] = m_ptex2DSphereRandomSamplingSRV;
break;
case 1:
// Compute in-scattering order for a given point and direction
pRenderTech = &m_ComputeScatteringOrderTech;
pRTVs = &ptex3DInsctrOrderRTVs;
pSRVs[0] = ptex3DSctrRadianceSRV;
break;
case 2:
// Accumulate in-scattering
pRenderTech = &m_AddScatteringOrderTech;
pRTVs = &ptex3DHighOrderSctrRTVs;
pSRVs[0] = ptex3DInsctrOrderSRV;
break;
}
for(UINT uiDepthSlice = 0; uiDepthSlice < PrecomputedSctrTexDesc.Depth; ++uiDepthSlice)
{
pContext->PSSetShaderResources(0, _countof(pSRVs), pSRVs);
// Set sun zenith and sun view angles
SMiscDynamicParams MiscDynamicParams = {NULL};
MiscDynamicParams.uiDepthSlice = uiDepthSlice;
UINT uiW = uiDepthSlice % sm_iPrecomputedSctrWDim;
UINT uiQ = uiDepthSlice / sm_iPrecomputedSctrWDim;
MiscDynamicParams.f2WQ.x = ((float)uiW + 0.5f) / (float)sm_iPrecomputedSctrWDim;
assert(0 < MiscDynamicParams.f2WQ.x && MiscDynamicParams.f2WQ.x < 1);
MiscDynamicParams.f2WQ.y = ((float)uiQ + 0.5f) / (float)sm_iPrecomputedSctrQDim;
assert(0 < MiscDynamicParams.f2WQ.y && MiscDynamicParams.f2WQ.y < 1);
UpdateConstantBuffer(pContext, m_pcbMiscParams, &MiscDynamicParams, sizeof(MiscDynamicParams));
//cbuffer cbMiscDynamicParams : register( b4 )
pContext->PSSetConstantBuffers(4, 1, &m_pcbMiscParams.p);
auto *pRTV = (ID3D11RenderTargetView*)(*pRTVs)[uiDepthSlice];
pContext->OMSetRenderTargets(1, &pRTV, NULL);
RenderQuad( pContext,
*pRenderTech,
PrecomputedSctrTexDesc.Width, PrecomputedSctrTexDesc.Height );
}
}
}
pContext->OMSetRenderTargets(0, NULL, NULL);
// Combine single scattering and higher order scattering into single texture
pContext->CopyResource(ptex3DMultipleSctr, ptex3DSingleSctr);
for(UINT uiDepthSlice = 0; uiDepthSlice < PrecomputedSctrTexDesc.Depth; ++uiDepthSlice)
{
ID3D11ShaderResourceView *pSRVs[1] = {m_ptex3DHighOrderScatteringSRV};
pContext->PSSetShaderResources(0, _countof(pSRVs), pSRVs);
SMiscDynamicParams MiscDynamicParams = {NULL};
MiscDynamicParams.uiDepthSlice = uiDepthSlice;
UpdateConstantBuffer(pContext, m_pcbMiscParams, &MiscDynamicParams, sizeof(MiscDynamicParams));
//cbuffer cbMiscDynamicParams : register( b4 )
pContext->PSSetConstantBuffers(4, 1, &m_pcbMiscParams.p);
auto *pRTV = (ID3D11RenderTargetView*)ptex3DMultipleSctrRTVs[uiDepthSlice];
pContext->OMSetRenderTargets(1, &pRTV, NULL);
RenderQuad( pContext,
m_AddScatteringOrderTech,
PrecomputedSctrTexDesc.Width, PrecomputedSctrTexDesc.Height );
}
pContext->OMSetRenderTargets(0, NULL, NULL);
return S_OK;
}
void CLightSctrPostProcess :: ReconstructCameraSpaceZ(SFrameAttribs &FrameAttribs)
{
if( !m_ReconstrCamSpaceZTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_ReconstrCamSpaceZTech.SetDeviceAndContext(FrameAttribs.pd3dDevice, FrameAttribs.pd3dDeviceContext);
m_ReconstrCamSpaceZTech.CreatePixelShaderFromFile( m_strEffectPath, "ReconstructCameraSpaceZPS", Macros );
m_ReconstrCamSpaceZTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_ReconstrCamSpaceZTech.SetDS( m_pDisableDepthTestDS );
m_ReconstrCamSpaceZTech.SetRS( m_pSolidFillNoCullRS );
m_ReconstrCamSpaceZTech.SetBS( m_pDefaultBS );
}
// Depth buffer is non-linear and cannot be interpolated directly
// We have to reconstruct camera space z to be able to use bilinear filtering
// Set render target first, because depth buffer is still bound on output and it must be unbound
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(1, &m_ptex2DCameraSpaceZRTV.p, NULL);
// Texture2D<float> g_tex2DCamSpaceZ : register( t0 );
FrameAttribs.pd3dDeviceContext->PSSetShaderResources(0, 1, &FrameAttribs.ptex2DSrcDepthBufferSRV);
RenderQuad( FrameAttribs.pd3dDeviceContext,
m_ReconstrCamSpaceZTech,
m_uiBackBufferWidth, m_uiBackBufferHeight );
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(0, NULL, NULL);
}
void CLightSctrPostProcess :: RenderSliceEndpoints(SFrameAttribs &FrameAttribs)
{
if( !m_RendedSliceEndpointsTech.IsValid() )
{
m_RendedSliceEndpointsTech.SetDeviceAndContext(FrameAttribs.pd3dDevice, FrameAttribs.pd3dDeviceContext);
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_RendedSliceEndpointsTech.CreatePixelShaderFromFile( m_strEffectPath, "GenerateSliceEndpointsPS", Macros );
m_RendedSliceEndpointsTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_RendedSliceEndpointsTech.SetDS( m_pDisableDepthTestDS );
m_RendedSliceEndpointsTech.SetRS( m_pSolidFillNoCullRS );
m_RendedSliceEndpointsTech.SetBS( m_pDefaultBS );
}
ID3D11RenderTargetView *ppRTVs[] = {m_ptex2DSliceEndpointsRTV};
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(_countof(ppRTVs), ppRTVs, NULL);
RenderQuad( FrameAttribs.pd3dDeviceContext, m_RendedSliceEndpointsTech,
m_PostProcessingAttribs.m_uiNumEpipolarSlices, 1 );
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(0, NULL, NULL);
}
void CLightSctrPostProcess :: RenderCoordinateTexture(SFrameAttribs &FrameAttribs)
{
if( !m_RendedCoordTexTech.IsValid() )
{
m_RendedCoordTexTech.SetDeviceAndContext(FrameAttribs.pd3dDevice, FrameAttribs.pd3dDeviceContext);
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_RendedCoordTexTech.CreatePixelShaderFromFile( m_strEffectPath, "GenerateCoordinateTexturePS", Macros );
m_RendedCoordTexTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_RendedCoordTexTech.SetDS( m_pDisableDepthTestIncrStencilDS );
m_RendedCoordTexTech.SetRS( m_pSolidFillNoCullRS );
m_RendedCoordTexTech.SetBS( m_pDefaultBS );
}
// Coordinate texture is a texture with dimensions [Total Samples X Num Slices]
// Texel t[i,j] contains projection-space screen cooridantes of the i-th sample in j-th epipolar slice
ID3D11RenderTargetView *ppRTVs[] = {m_ptex2DCoordinateTextureRTV, m_ptex2DEpipolarCamSpaceZRTV};
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(_countof(ppRTVs), ppRTVs, m_ptex2DEpipolarImageDSV);
static const float fInvalidCoordinate = -1e+30f; // Both coord texture and epipolar CamSpaceZ are 32-bit float
float InvalidCoords[] = {fInvalidCoordinate, fInvalidCoordinate, fInvalidCoordinate, fInvalidCoordinate};
// Clear both render targets with values that can't be correct projection space coordinates and camera space Z:
FrameAttribs.pd3dDeviceContext->ClearRenderTargetView(m_ptex2DCoordinateTextureRTV, InvalidCoords);
FrameAttribs.pd3dDeviceContext->ClearRenderTargetView(m_ptex2DEpipolarCamSpaceZRTV, InvalidCoords);
// Clear depth stencil view. Since we use stencil part only, there is no need to clear depth
// Set stencil value to 0
FrameAttribs.pd3dDeviceContext->ClearDepthStencilView(m_ptex2DEpipolarImageDSV, D3D11_CLEAR_STENCIL, 1.0f, 0);
ID3D11ShaderResourceView *pSRVs[] =
{
m_ptex2DCameraSpaceZSRV, // Texture2D<float> g_tex2DCamSpaceZ : register( t0 );
NULL, // Unused : register( t1 )
NULL, // Unused : register( t2 )
NULL, // Unused : register( t3 )
m_ptex2DSliceEndpointsSRV, // Texture2D<float4> g_tex2DSliceEndPoints : register( t4 );
};
FrameAttribs.pd3dDeviceContext->PSSetShaderResources(0, _countof(pSRVs), pSRVs);
// Depth stencil state is configured to always increment stencil value. If coordinates are outside the screen,
// the pixel shader discards the pixel and stencil value is left untouched. All such pixels will be skipped from
// further processing
RenderQuad( FrameAttribs.pd3dDeviceContext, m_RendedCoordTexTech,
m_PostProcessingAttribs.m_uiMaxSamplesInSlice, m_PostProcessingAttribs.m_uiNumEpipolarSlices );
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(0, NULL, NULL);
}
void CLightSctrPostProcess :: RenderCoarseUnshadowedInctr(SFrameAttribs &FrameAttribs)
{
if( !m_RenderCoarseUnshadowedInsctrTech.IsValid() )
{
m_RenderCoarseUnshadowedInsctrTech.SetDeviceAndContext(FrameAttribs.pd3dDevice, FrameAttribs.pd3dDeviceContext);
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_RenderCoarseUnshadowedInsctrTech.CreatePixelShaderFromFile( m_strEffectPath, "RenderCoarseUnshadowedInsctrPS", Macros );
m_RenderCoarseUnshadowedInsctrTech.SetVS( m_pGenerateScreenSizeQuadVS );
m_RenderCoarseUnshadowedInsctrTech.SetDS( m_pNoDepth_StEqual_KeepStencilDS, 1);
m_RenderCoarseUnshadowedInsctrTech.SetRS( m_pSolidFillNoCullRS );
m_RenderCoarseUnshadowedInsctrTech.SetBS( m_pDefaultBS );
}
if( m_PostProcessingAttribs.m_uiExtinctionEvalMode == EXTINCTION_EVAL_MODE_EPIPOLAR &&
!m_ptex2DEpipolarExtinctionSRV )
{
D3D11_TEXTURE2D_DESC EpipolarExtinctionTexDesc =
{
m_PostProcessingAttribs.m_uiMaxSamplesInSlice, //UINT Width;
m_PostProcessingAttribs.m_uiNumEpipolarSlices, //UINT Height;
1, //UINT MipLevels;
1, //UINT ArraySize;
DXGI_FORMAT_R8G8B8A8_UNORM, //DXGI_FORMAT Format;
{1,0}, //DXGI_SAMPLE_DESC SampleDesc;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET, //UINT BindFlags;
0, //UINT CPUAccessFlags;
0, //UINT MiscFlags;
};
CComPtr<ID3D11Texture2D> ptex2DEpipolarExtinction;
// Create 2-D texture, shader resource and target view buffers on the device
HRESULT hr;
V( FrameAttribs.pd3dDevice->CreateTexture2D( &EpipolarExtinctionTexDesc, NULL, &ptex2DEpipolarExtinction) );
V( FrameAttribs.pd3dDevice->CreateShaderResourceView( ptex2DEpipolarExtinction, NULL, &m_ptex2DEpipolarExtinctionSRV) );
V( FrameAttribs.pd3dDevice->CreateRenderTargetView( ptex2DEpipolarExtinction, NULL, &m_ptex2DEpipolarExtinctionRTV) );
}
ID3D11ShaderResourceView *pSRVs[] =
{
m_ptex2DCoordinateTextureSRV, //Texture2D<float2> g_tex2DCoordinates : register( t1 );
m_ptex2DEpipolarCamSpaceZSRV, //Texture2D<float> g_tex2DEpipolarCamSpaceZ : register( t2 );
nullptr, // t3
nullptr, // t4
m_ptex2DOccludedNetDensityToAtmTopSRV, // Texture2D<float2> g_tex2DOccludedNetDensityToAtmTop : register( t5 );
nullptr, // t6
m_ptex3DSingleScatteringSRV, // Texture3D<float3> g_tex3DSingleSctrLUT : register( t7 );
m_ptex3DHighOrderScatteringSRV, // Texture3D<float3> g_tex3DHighOrderSctrLUT : register( t8 );
m_ptex3DMultipleScatteringSRV // Texture3D<float3> g_tex3DMultipleSctrLUT : register( t9 );
};
FrameAttribs.pd3dDeviceContext->PSSetShaderResources(1, _countof(pSRVs), pSRVs);
float flt16max = 65504.f; // Epipolar Inscattering is 16-bit float
const float InvalidInsctr[] = {-flt16max, -flt16max, -flt16max, -flt16max};
if( m_ptex2DEpipolarInscatteringRTV )
FrameAttribs.pd3dDeviceContext->ClearRenderTargetView(m_ptex2DEpipolarInscatteringRTV, InvalidInsctr);
const float One[] = {1, 1, 1, 1};
if( m_ptex2DEpipolarExtinctionRTV )
FrameAttribs.pd3dDeviceContext->ClearRenderTargetView(m_ptex2DEpipolarExtinctionRTV, One);
ID3D11RenderTargetView *pRTVs[] = {m_ptex2DEpipolarInscatteringRTV, m_ptex2DEpipolarExtinctionRTV};
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(_countof(pRTVs),pRTVs, m_ptex2DEpipolarImageDSV);
RenderQuad( FrameAttribs.pd3dDeviceContext,
m_RenderCoarseUnshadowedInsctrTech,
m_PostProcessingAttribs.m_uiMaxSamplesInSlice, m_PostProcessingAttribs.m_uiNumEpipolarSlices );
FrameAttribs.pd3dDeviceContext->OMSetRenderTargets(0, NULL, NULL);
}
void CLightSctrPostProcess :: RefineSampleLocations(SFrameAttribs &FrameAttribs)
{
if( !m_RefineSampleLocationsTech.IsValid() )
{
m_RefineSampleLocationsTech.SetDeviceAndContext(FrameAttribs.pd3dDevice, FrameAttribs.pd3dDeviceContext);
// Thread group size must be at least as large as initial sample step
m_uiSampleRefinementCSThreadGroupSize = max( m_uiSampleRefinementCSMinimumThreadGroupSize, m_PostProcessingAttribs.m_uiInitialSampleStepInSlice );
// Thread group size cannot be larger than the total number of samples in slice
m_uiSampleRefinementCSThreadGroupSize = min( m_uiSampleRefinementCSThreadGroupSize, m_PostProcessingAttribs.m_uiMaxSamplesInSlice );
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);