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maszyna/betterRenderer/renderer/source/ssao.cpp
maj00r 26501b0fd7 hoist standard includes above everything else 
Ordering them before the imports in the same file was not enough: a
project header on line 1 can import a module several levels down whose
global module fragment already pulled in the same standard header, and
that include guard does not cross the module boundary. Putting them
first means the guard is set before anything can import.

Skips vendored single-header libraries and anything inside an #if.
2026-09-10 01:02:17 +02:00

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#include <array>
#include <cstddef>
#include "ssao.h"
#include <nvrhi/nvrhi.h>
#include <nvrhi/utils.h>
#include "XeGTAO.h"
#include "gbuffer.h"
#include "nvrenderer/nvrenderer.h"
#include "nvrendererbackend.h"
#include "imgui/imgui.h"
import eu07.glm;
NvSsao::NvSsao(NvRenderer* renderer)
: m_backend(renderer->m_backend.get()),
m_gbuffer(renderer->m_gbuffer.get()),
m_width(0),
m_height(0) {}
void NvSsao::Init() {
using namespace nvrhi;
m_CSPrefilterDepths16x16 = m_backend->CreateShader(
"gtao_CSPrefilterDepths16x16", ShaderType::Compute);
m_CSGTAOLow = m_backend->CreateShader("gtao_CSGTAOLow", ShaderType::Compute);
m_CSGTAOMedium =
m_backend->CreateShader("gtao_CSGTAOMedium", ShaderType::Compute);
m_CSGTAOHigh =
m_backend->CreateShader("gtao_CSGTAOHigh", ShaderType::Compute);
m_CSGTAOUltra =
m_backend->CreateShader("gtao_CSGTAOUltra", ShaderType::Compute);
m_CSDenoisePass =
m_backend->CreateShader("gtao_CSDenoisePass", ShaderType::Compute);
m_CSDenoiseLastPass =
m_backend->CreateShader("gtao_CSDenoiseLastPass", ShaderType::Compute);
m_width = m_gbuffer->m_framebuffer->getFramebufferInfo().width;
m_height = m_gbuffer->m_framebuffer->getFramebufferInfo().height;
m_constantBuffer = m_backend->GetDevice()->createBuffer(
nvrhi::utils::CreateStaticConstantBufferDesc(
sizeof(XeGTAO::GTAOConstants), "XeGTAO Constants")
.setInitialState(ResourceStates::ConstantBuffer)
.setKeepInitialState(true));
m_workingDepths = m_backend->GetDevice()->createTexture(
nvrhi::TextureDesc()
.setDebugName("XeGTAO Working Depths")
.setWidth(m_width)
.setHeight(m_height)
.setIsUAV(true)
.setFormat(Format::R32_FLOAT)
.setMipLevels(XE_GTAO_DEPTH_MIP_LEVELS)
.setInitialState(ResourceStates::ShaderResource)
.setKeepInitialState(true));
m_workingEdges = m_backend->GetDevice()->createTexture(
nvrhi::TextureDesc()
.setDebugName("XeGTAO Working Edges")
.setWidth(m_width)
.setHeight(m_height)
.setIsUAV(true)
.setFormat(Format::R8_UNORM)
.setInitialState(ResourceStates::ShaderResource)
.setKeepInitialState(true));
m_debugImage = m_backend->GetDevice()->createTexture(
nvrhi::TextureDesc()
.setDebugName("XeGTAO Debug Image")
.setWidth(m_width)
.setHeight(m_height)
.setIsUAV(true)
.setFormat(Format::R11G11B10_FLOAT)
.setInitialState(ResourceStates::ShaderResource)
.setKeepInitialState(true));
m_workingAOTerm = m_backend->GetDevice()->createTexture(
nvrhi::TextureDesc()
.setDebugName("XeGTAO Working AO Term A")
.setWidth(m_width)
.setHeight(m_height)
.setIsUAV(true)
.setFormat(Format::R32_UINT)
.setInitialState(ResourceStates::ShaderResource)
.setKeepInitialState(true));
m_workingAOTermPong = m_backend->GetDevice()->createTexture(
nvrhi::TextureDesc()
.setDebugName("XeGTAO Working AO Term B")
.setWidth(m_width)
.setHeight(m_height)
.setIsUAV(true)
.setFormat(Format::R32_UINT)
.setInitialState(ResourceStates::ShaderResource)
.setKeepInitialState(true));
m_outputAO = m_backend->GetDevice()->createTexture(
nvrhi::TextureDesc()
.setDebugName("XeGTAO Output AO")
.setWidth(m_width)
.setHeight(m_height)
.setIsUAV(true)
.setFormat(Format::RGBA8_UNORM)
.setIsTypeless(true)
.setInitialState(ResourceStates::ShaderResource)
.setKeepInitialState(true));
SamplerHandle sampler_point = m_SamplerPoint =
m_backend->GetDevice()->createSampler(
nvrhi::SamplerDesc()
.setAllAddressModes(SamplerAddressMode::Clamp)
.setAllFilters(false));
{
BindingLayoutHandle blPrefilterDepths;
BindingSetDesc bsDescPrefilter =
BindingSetDesc()
.addItem(BindingSetItem::ConstantBuffer(0, m_constantBuffer))
.addItem(BindingSetItem::Texture_SRV(0, m_gbuffer->m_gbuffer_depth))
.addItem(BindingSetItem::Sampler(0, sampler_point));
for (int i = 0; i < XE_GTAO_DEPTH_MIP_LEVELS; ++i) {
bsDescPrefilter.addItem(
BindingSetItem::Texture_UAV(i, m_workingDepths, Format::UNKNOWN,
TextureSubresourceSet(i, 1, 0, 1)));
}
utils::CreateBindingSetAndLayout(m_backend->GetDevice(),
ShaderType::Compute, 0, bsDescPrefilter,
blPrefilterDepths, m_BSPrefilterDepths);
m_PSOPrefilterDepths = m_backend->GetDevice()->createComputePipeline(
ComputePipelineDesc()
.setComputeShader(m_CSPrefilterDepths16x16)
.addBindingLayout(blPrefilterDepths));
}
{
BindingLayoutHandle blGTAO;
utils::CreateBindingSetAndLayout(
m_backend->GetDevice(), ShaderType::Compute, 0,
BindingSetDesc()
.addItem(BindingSetItem::ConstantBuffer(0, m_constantBuffer))
.addItem(BindingSetItem ::Texture_SRV(0, m_workingDepths))
.addItem(BindingSetItem::Texture_UAV(0, m_workingAOTerm))
.addItem(BindingSetItem::Texture_UAV(1, m_workingEdges))
.addItem(BindingSetItem::Texture_UAV(2, m_debugImage))
.addItem(BindingSetItem::Sampler(0, sampler_point)),
blGTAO, m_BSGTAO);
std::array<IShader*, 4> const shaders{m_CSGTAOLow, m_CSGTAOMedium,
m_CSGTAOHigh, m_CSGTAOUltra};
for (int i = 0; i < 4; ++i) {
m_PSOGTAO[i] = m_backend->GetDevice()->createComputePipeline(
ComputePipelineDesc()
.setComputeShader(shaders[i])
.addBindingLayout(blGTAO));
}
}
{
BindingLayoutHandle blDenoise;
m_BLDenoise = m_backend->GetDevice()->createBindingLayout(
BindingLayoutDesc()
.setVisibility(nvrhi::ShaderType::Compute)
.addItem(BindingLayoutItem::ConstantBuffer(0))
.addItem(BindingLayoutItem::Texture_SRV(0))
.addItem(BindingLayoutItem::Texture_SRV(1))
.addItem(BindingLayoutItem::Texture_UAV(0))
.addItem(BindingLayoutItem::Texture_UAV(1))
.addItem(BindingLayoutItem::Texture_UAV(2))
.addItem(BindingLayoutItem::Sampler(0)));
utils::CreateBindingSetAndLayout(
m_backend->GetDevice(), ShaderType::Compute, 0,
BindingSetDesc()
.addItem(BindingSetItem::ConstantBuffer(0, m_constantBuffer))
.addItem(BindingSetItem::Texture_SRV(1, m_workingEdges))
.addItem(BindingSetItem::Texture_UAV(2, m_debugImage))
.addItem(BindingSetItem::Sampler(0, sampler_point)),
blDenoise, m_BSDenoise);
m_PSODenoise = m_backend->GetDevice()->createComputePipeline(
ComputePipelineDesc()
.setComputeShader(m_CSDenoisePass)
//.addBindingLayout(blDenoise)
.addBindingLayout(m_BLDenoise));
m_PSODenoiseLastPass = m_backend->GetDevice()->createComputePipeline(
ComputePipelineDesc()
.setComputeShader(m_CSDenoiseLastPass)
//.addBindingLayout(blDenoise)
.addBindingLayout(m_BLDenoise));
}
}
void NvSsao::Render(nvrhi::ICommandList* command_list,
const glm::mat4& projection, size_t frame_index) {
command_list->beginMarker("XeGTAO");
XeGTAO::GTAOConstants constants{};
XeGTAO::GTAOUpdateConstants(constants, m_width, m_height, settings,
projection, false, frame_index);
command_list->writeBuffer(m_constantBuffer, &constants, sizeof(constants));
{
command_list->beginMarker("Prefilter Depth");
nvrhi::ComputeState state;
state.setPipeline(m_PSOPrefilterDepths);
state.addBindingSet(m_BSPrefilterDepths);
command_list->setComputeState(state);
command_list->dispatch((m_width + 16 - 1) / 16, (m_height + 16 - 1) / 16,
1);
command_list->endMarker();
}
{
command_list->beginMarker("Main Pass");
nvrhi::ComputeState state;
state.setPipeline(m_PSOGTAO[glm::clamp(settings.QualityLevel, 0, 3)]);
state.addBindingSet(m_BSGTAO);
command_list->setComputeState(state);
command_list->dispatch(
(m_width + XE_GTAO_NUMTHREADS_X - 1) / XE_GTAO_NUMTHREADS_X,
(m_height + XE_GTAO_NUMTHREADS_Y - 1) / XE_GTAO_NUMTHREADS_Y, 1);
command_list->endMarker();
}
{
command_list->beginMarker("Denoise Pass");
int num_passes = settings.DenoisePasses;
nvrhi::ITexture* ping = m_workingAOTerm;
nvrhi::ITexture* pong = m_workingAOTermPong;
for (int i = 0; i < num_passes; ++i) {
nvrhi::ComputeState state;
bool last_pass = i == num_passes - 1;
auto bindingSet = m_backend->GetDevice()->createBindingSet(
nvrhi::BindingSetDesc()
.addItem(
nvrhi::BindingSetItem::ConstantBuffer(0, m_constantBuffer))
.addItem(nvrhi::BindingSetItem::Texture_SRV(0, ping))
.addItem(nvrhi::BindingSetItem::Texture_SRV(1, m_workingEdges))
.addItem(nvrhi::BindingSetItem::Texture_UAV(
0, last_pass ? m_outputAO.Get() : pong,
nvrhi::Format::R32_UINT))
.addItem(nvrhi::BindingSetItem::Texture_UAV(1, m_workingEdges))
.addItem(nvrhi::BindingSetItem::Texture_UAV(2, m_debugImage))
.addItem(nvrhi::BindingSetItem::Sampler(0, m_SamplerPoint)),
m_BLDenoise);
state.setPipeline(last_pass ? m_PSODenoiseLastPass : m_PSODenoise);
// state.addBindingSet(m_BSDenoise);
state.addBindingSet(bindingSet);
command_list->setComputeState(state);
command_list->dispatch(
(m_width + (XE_GTAO_NUMTHREADS_X * 2) - 1) /
(XE_GTAO_NUMTHREADS_X * 2),
(m_height + XE_GTAO_NUMTHREADS_Y - 1) / XE_GTAO_NUMTHREADS_Y, 1);
std::swap(ping, pong);
}
command_list->endMarker();
command_list->setTextureState(m_outputAO, nvrhi::AllSubresources,
nvrhi::ResourceStates::ShaderResource);
}
command_list->endMarker();
}
void NvSsao::OnGui(bool const open_now) {
static bool open = false;
open |= open_now;
if (open && ImGui::Begin("GTAO Settings", &open)) {
ImGui::InputInt("Quality level", &settings.QualityLevel);
ImGui::InputInt("Denoise passes", &settings.DenoisePasses);
ImGui::InputFloat("Radius", &settings.Radius);
if (ImGui::CollapsingHeader("Advanced")) {
ImGui::InputFloat("Radius multiplier", &settings.RadiusMultiplier);
ImGui::InputFloat("Falloff range", &settings.FalloffRange);
ImGui::InputFloat("Sample distribution power",
&settings.SampleDistributionPower);
ImGui::InputFloat("Thin occluder compensation",
&settings.ThinOccluderCompensation);
ImGui::InputFloat("Final value power", &settings.FinalValuePower);
ImGui::InputFloat("Depth MIP sampling offset",
&settings.DepthMIPSamplingOffset);
}
ImGui::End();
}
}
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