void RTShadows_DrawMetrics(
RenderCore::Metal::DeviceContext& context,
LightingParserContext& parserContext, MainTargetsBox& mainTargets)
{
SavedTargets savedTargets(context);
auto restoreMarker = savedTargets.MakeResetMarker(context);
context.GetUnderlying()->OMSetRenderTargets(1, savedTargets.GetRenderTargets(), nullptr); // (unbind depth)
context.BindPS(MakeResourceList(5, mainTargets._gbufferRTVsSRV[0], mainTargets._gbufferRTVsSRV[1], mainTargets._gbufferRTVsSRV[2], mainTargets._msaaDepthBufferSRV));
const bool useMsaaSamplers = mainTargets._desc._sampling._sampleCount > 1;
StringMeld<256> defines;
defines << "SHADOW_CASCADE_MODE=2";
if (useMsaaSamplers) defines << ";MSAA_SAMPLERS=1";
auto& debuggingShader = ::Assets::GetAssetDep<Metal::ShaderProgram>(
"game/xleres/basic2D.vsh:fullscreen:vs_*",
"game/xleres/shadowgen/rtshadmetrics.sh:ps_main:ps_*",
defines.get());
Metal::BoundUniforms uniforms(debuggingShader);
Techniques::TechniqueContext::BindGlobalUniforms(uniforms);
uniforms.BindShaderResources(1, {"RTSListsHead", "RTSLinkedLists", "RTSTriangles", "DepthTexture"});
uniforms.BindConstantBuffers(1, {"OrthogonalShadowProjection", "ScreenToShadowProjection"});
context.Bind(debuggingShader);
context.Bind(Techniques::CommonResources()._blendStraightAlpha);
SetupVertexGeneratorShader(context);
for (const auto& p:parserContext._preparedRTShadows) {
const Metal::ShaderResourceView* srvs[] =
{ &p.second._listHeadSRV, &p.second._linkedListsSRV, &p.second._trianglesSRV, &mainTargets._msaaDepthBufferSRV };
SharedPkt constants[2];
const Metal::ConstantBuffer* prebuiltConstants[2] = {nullptr, nullptr};
prebuiltConstants[0] = &p.second._orthoCB;
constants[1] = BuildScreenToShadowConstants(
p.second, parserContext.GetProjectionDesc()._cameraToWorld,
parserContext.GetProjectionDesc()._cameraToProjection);
uniforms.Apply(
context, parserContext.GetGlobalUniformsStream(),
Metal::UniformsStream(constants, prebuiltConstants, dimof(constants), srvs, dimof(srvs)));
}
context.Draw(4);
}
void VegetationSpawn_Prepare(
Metal::DeviceContext* context, LightingParserContext& parserContext,
const VegetationSpawnConfig& cfg, VegetationSpawnResources& res)
{
// Prepare the scene for vegetation spawn
// This means binding our output buffers to the stream output slots,
// and then rendering the terrain with a special technique.
// We can use flags to force the scene parser to render only the terrain
//
// If we use "GeometryShader::SetDefaultStreamOutputInitializers", then future
// geometry shaders will be created as stream-output shaders.
using namespace RenderCore;
auto oldSO = Metal::GeometryShader::GetDefaultStreamOutputInitializers();
ID3D::Query* begunQuery = nullptr;
auto oldCamera = parserContext.GetProjectionDesc();
CATCH_ASSETS_BEGIN
auto& perlinNoiseRes = Techniques::FindCachedBox2<SceneEngine::PerlinNoiseResources>();
context->BindGS(MakeResourceList(12, perlinNoiseRes._gradShaderResource, perlinNoiseRes._permShaderResource));
context->BindGS(MakeResourceList(Metal::SamplerState()));
// we have to clear vertex input "3", because this is the instancing input slot -- and
// we're going to be writing to buffers that will be used for instancing.
// ID3D::Buffer* nullBuffer = nullptr; unsigned zero = 0;
// context->GetUnderlying()->IASetVertexBuffers(3, 1, &nullBuffer, &zero, &zero);
context->Unbind<Metal::VertexBuffer>();
context->UnbindVS<Metal::ShaderResourceView>(15, 1);
float maxDrawDistance = 0.f;
for (const auto& m:cfg._materials)
for (const auto& b:m._buckets)
maxDrawDistance = std::max(b._maxDrawDistance, maxDrawDistance);
class InstanceSpawnConstants
{
public:
Float4x4 _worldToCullFrustum;
float _gridSpacing, _baseDrawDistanceSq, _jitterAmount;
unsigned _dummy;
Float4 _materialParams[8];
Float4 _suppressionNoiseParams[8];
} instanceSpawnConstants = {
parserContext.GetProjectionDesc()._worldToProjection,
cfg._baseGridSpacing, maxDrawDistance*maxDrawDistance, cfg._jitterAmount, 0,
{ Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>(),
Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>() },
{ Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>(),
Zero<Float4>(), Zero<Float4>(), Zero<Float4>(), Zero<Float4>() }
};
for (unsigned mi=0; mi<std::min(cfg._materials.size(), dimof(instanceSpawnConstants._materialParams)); ++mi) {
instanceSpawnConstants._materialParams[mi][0] = cfg._materials[mi]._suppressionThreshold;
instanceSpawnConstants._suppressionNoiseParams[mi][0] = cfg._materials[mi]._suppressionNoise;
instanceSpawnConstants._suppressionNoiseParams[mi][1] = cfg._materials[mi]._suppressionGain;
instanceSpawnConstants._suppressionNoiseParams[mi][2] = cfg._materials[mi]._suppressionLacunarity;
}
context->BindGS(MakeResourceList(5, Metal::ConstantBuffer(&instanceSpawnConstants, sizeof(InstanceSpawnConstants))));
const bool needQuery = false;
if (constant_expression<needQuery>::result()) {
begunQuery = res._streamOutputCountsQuery.get();
context->GetUnderlying()->Begin(begunQuery);
}
static const Metal::InputElementDesc eles[] = {
// Our instance format is very simple. It's just a position and
// rotation value (in 32 bit floats)
// I'm not sure if the hardware will support 16 bit floats in a
// stream output buffer (though maybe we could use fixed point
// 16 bit integers?)
// We write a "type" value to a second buffer. Let's keep that
// buffer as small as possible, because we have to clear it
// before hand
Metal::InputElementDesc("INSTANCEPOS", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
// vertex in slot 1 must have a vertex stride that is a multiple of 4
Metal::InputElementDesc("INSTANCEPARAM", 0, Metal::NativeFormat::R32_UINT, 1)
};
// How do we clear an SO buffer? We can't make it an unorderedaccess view or render target.
// The only obvious way is to use CopyResource, and copy from a prepared "cleared" buffer
Metal::Copy(*context, res._streamOutputResources[1]->GetUnderlying(), res._clearedTypesResource->GetUnderlying());
unsigned strides[2] = { Stream0VertexSize, Stream1VertexSize };
Metal::GeometryShader::SetDefaultStreamOutputInitializers(
Metal::GeometryShader::StreamOutputInitializers(eles, dimof(eles), strides, 2));
SceneParseSettings parseSettings(
SceneParseSettings::BatchFilter::General,
SceneParseSettings::Toggles::Terrain);
// Adjust the far clip so that it's very close...
// We might want to widen the field of view slightly
// by moving the camera back a bit. This could help make
// sure that objects near the camera and on the edge of the screen
// get included
auto newProjDesc = AdjustProjDesc(oldCamera, maxDrawDistance);
// We have to call "SetGlobalTransform" to force the camera changes to have effect.
// Ideally there would be a cleaner way to automatically update the constants
// when the bound camera changes...
LightingParser_SetGlobalTransform(*context, parserContext, newProjDesc);
context->BindSO(MakeResourceList(res._streamOutputBuffers[0], res._streamOutputBuffers[1]));
parserContext.GetSceneParser()->ExecuteScene(context, parserContext, parseSettings, 5);
context->UnbindSO();
// After the scene execute, we need to use a compute shader to separate the
// stream output data into it's bins.
static const unsigned MaxOutputBinCount = 8;
ID3D::UnorderedAccessView* outputBins[MaxOutputBinCount];
unsigned initialCounts[MaxOutputBinCount];
std::fill(outputBins, &outputBins[dimof(outputBins)], nullptr);
std::fill(initialCounts, &initialCounts[dimof(initialCounts)], 0);
auto outputBinCount = std::min((unsigned)cfg._objectTypes.size(), (unsigned)res._instanceBufferUAVs.size());
for (unsigned c=0; c<outputBinCount; ++c) {
unsigned clearValues[] = { 0, 0, 0, 0 };
context->Clear(res._instanceBufferUAVs[c], clearValues);
outputBins[c] = res._instanceBufferUAVs[c].GetUnderlying();
}
context->BindCS(MakeResourceList(res._streamOutputSRV[0], res._streamOutputSRV[1]));
context->GetUnderlying()->CSSetUnorderedAccessViews(0, outputBinCount, outputBins, initialCounts);
class InstanceSeparateConstants
{
public:
UInt4 _binThresholds[16];
Float4 _drawDistanceSq[16];
} instanceSeparateConstants;
XlZeroMemory(instanceSeparateConstants);
StringMeld<1024> shaderParams;
unsigned premapBinCount = 0;
for (unsigned mi=0; mi<cfg._materials.size(); ++mi) {
const auto& m = cfg._materials[mi];
float combinedWeight = 0.f; // m._noSpawnWeight;
for (const auto& b:m._buckets) combinedWeight += b._frequencyWeight;
unsigned weightIterator = 0;
for (unsigned c=0; c<std::min(dimof(instanceSeparateConstants._binThresholds), m._buckets.size()); ++c) {
weightIterator += unsigned(4095.f * m._buckets[c]._frequencyWeight / combinedWeight);
instanceSeparateConstants._binThresholds[premapBinCount][0] = (mi<<12) | weightIterator;
instanceSeparateConstants._drawDistanceSq[premapBinCount][0]
= m._buckets[c]._maxDrawDistance * m._buckets[c]._maxDrawDistance;
shaderParams << "OUTPUT_BUFFER_MAP" << premapBinCount << "=" << m._buckets[c]._objectType << ";";
++premapBinCount;
}
}
for (unsigned c=premapBinCount; c<dimof(instanceSeparateConstants._binThresholds); ++c)
shaderParams << "OUTPUT_BUFFER_MAP" << c << "=0;";
shaderParams << "INSTANCE_BIN_COUNT=" << premapBinCount;
context->BindCS(MakeResourceList(
parserContext.GetGlobalTransformCB(),
Metal::ConstantBuffer(&instanceSeparateConstants, sizeof(instanceSeparateConstants))));
context->Bind(::Assets::GetAssetDep<Metal::ComputeShader>(
"game/xleres/Vegetation/InstanceSpawnSeparate.csh:main:cs_*",
shaderParams.get()));
context->Dispatch(StreamOutputMaxCount / 256);
// unbind all of the UAVs again
context->UnbindCS<Metal::UnorderedAccessView>(0, outputBinCount);
context->UnbindCS<Metal::ShaderResourceView>(0, 2);
res._isPrepared = true;
CATCH_ASSETS_END(parserContext)
if (begunQuery) {
context->GetUnderlying()->End(begunQuery);
}
// (reset the camera transform if it's changed)
LightingParser_SetGlobalTransform(*context, parserContext, oldCamera);
context->UnbindSO();
Metal::GeometryShader::SetDefaultStreamOutputInitializers(oldSO);
// oldTargets.ResetToOldTargets(context);
}
PreparedRTShadowFrustum PrepareRTShadows(
IThreadContext& context,
Metal::DeviceContext& metalContext,
LightingParserContext& parserContext,
PreparedScene& preparedScene,
const ShadowProjectionDesc& frustum,
unsigned shadowFrustumIndex)
{
SceneParseSettings sceneParseSettings(
SceneParseSettings::BatchFilter::RayTracedShadows,
~SceneParseSettings::Toggles::BitField(0),
shadowFrustumIndex);
if (!parserContext.GetSceneParser()->HasContent(sceneParseSettings))
return PreparedRTShadowFrustum();
Metal::GPUProfiler::DebugAnnotation anno(metalContext, L"Prepare-RTShadows");
auto& box = Techniques::FindCachedBox2<RTShadowsBox>(256, 256, 1024*1024, 32, 64*1024);
auto oldSO = Metal::GeometryShader::GetDefaultStreamOutputInitializers();
static const Metal::InputElementDesc soVertex[] =
{
Metal::InputElementDesc("A", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("B", 0, Metal::NativeFormat::R32G32_FLOAT),
Metal::InputElementDesc("C", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("D", 0, Metal::NativeFormat::R32G32B32_FLOAT)
};
static const Metal::InputElementDesc il[] =
{
Metal::InputElementDesc("A", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("B", 0, Metal::NativeFormat::R32G32_FLOAT),
Metal::InputElementDesc("C", 0, Metal::NativeFormat::R32G32B32A32_FLOAT),
Metal::InputElementDesc("D", 0, Metal::NativeFormat::R32G32B32_FLOAT)
};
metalContext.UnbindPS<Metal::ShaderResourceView>(5, 3);
const unsigned bufferCount = 1;
unsigned strides[] = { 52 };
unsigned offsets[] = { 0 };
Metal::GeometryShader::SetDefaultStreamOutputInitializers(
Metal::GeometryShader::StreamOutputInitializers(soVertex, dimof(soVertex), strides, 1));
static_assert(bufferCount == dimof(strides), "Stream output buffer count mismatch");
static_assert(bufferCount == dimof(offsets), "Stream output buffer count mismatch");
metalContext.BindSO(MakeResourceList(box._triangleBufferVB));
// set up the render state for writing into the grid buffer
SavedTargets savedTargets(metalContext);
metalContext.Bind(box._gridBufferViewport);
metalContext.Unbind<Metal::RenderTargetView>();
metalContext.Bind(Techniques::CommonResources()._blendOpaque);
metalContext.Bind(Techniques::CommonResources()._defaultRasterizer); // for newer video cards, we need "conservative raster" enabled
PreparedRTShadowFrustum preparedResult;
preparedResult.InitialiseConstants(&metalContext, frustum._projections);
using TC = Techniques::TechniqueContext;
parserContext.SetGlobalCB(metalContext, TC::CB_ShadowProjection, &preparedResult._arbitraryCBSource, sizeof(preparedResult._arbitraryCBSource));
parserContext.SetGlobalCB(metalContext, TC::CB_OrthoShadowProjection, &preparedResult._orthoCBSource, sizeof(preparedResult._orthoCBSource));
parserContext.GetTechniqueContext()._runtimeState.SetParameter(
StringShadowCascadeMode,
(preparedResult._mode == ShadowProjectionDesc::Projections::Mode::Ortho)?2:1);
// Now, we need to transform the object's triangle buffer into shadow
// projection space during this step (also applying skinning, wind bending, and
// any other animation effects.
//
// Each object that will be used with projected shadows must have a buffer
// containing the triangle information.
//
// We can deal with this in a number of ways:
// 1. rtwritetiles shader writes triangles out in a stream-output step
// 2. transform triangles first, then pass that information through the rtwritetiles shader
// 3. transform triangles completely separately from the rtwritetiles step
//
// Method 1 would avoid extra transformations of the input data, and actually
// simplifies some of the shader work. We don't need any special input buffers
// or extra input data. The shaders just take generic model information, and build
// everything they need, as they need it.
//
// We can also choose to reject backfacing triangles at this point, as well as
// removing triangles that are culled from the frustum.
//
Float4x4 savedWorldToProjection = parserContext.GetProjectionDesc()._worldToProjection;
parserContext.GetProjectionDesc()._worldToProjection = frustum._worldToClip;
auto cleanup = MakeAutoCleanup(
[&parserContext, &savedWorldToProjection]() {
parserContext.GetProjectionDesc()._worldToProjection = savedWorldToProjection;
parserContext.GetTechniqueContext()._runtimeState.SetParameter(StringShadowCascadeMode, 0);
});
CATCH_ASSETS_BEGIN
parserContext.GetSceneParser()->ExecuteScene(
context, parserContext, sceneParseSettings,
preparedScene, TechniqueIndex_RTShadowGen);
CATCH_ASSETS_END(parserContext)
metalContext.UnbindSO();
Metal::GeometryShader::SetDefaultStreamOutputInitializers(oldSO);
// We have the list of triangles. Let's render then into the final
// grid buffer viewport. This should create a list of triangles for
// each cell in the grid. The goal is to reduce the number of triangles
// that the ray tracing shader needs to look at.
//
// We could attempt to do this in the same step above. But that creates
// some problems with frustum cull and back face culling. This order
// allows us reduce the total triangle count before we start assigning
// primitive ids.
//
// todo -- also calculate min/max for each grid during this step
CATCH_ASSETS_BEGIN
auto& shader = ::Assets::GetAssetDep<Metal::ShaderProgram>(
"game/xleres/shadowgen/rtwritetiles.sh:vs_passthrough:vs_*",
"game/xleres/shadowgen/consraster.sh:gs_conservativeRasterization:gs_*",
"game/xleres/shadowgen/rtwritetiles.sh:ps_main:ps_*",
"OUTPUT_PRIM_ID=1;INPUT_RAYTEST_TRIS=1");
metalContext.Bind(shader);
Metal::BoundInputLayout inputLayout(Metal::InputLayout(il, dimof(il)), shader);
metalContext.Bind(inputLayout);
// no shader constants/resources required
unsigned clearValues[] = { 0, 0, 0, 0 };
metalContext.Clear(box._gridBufferUAV, clearValues);
metalContext.Bind(Techniques::CommonResources()._blendOpaque);
metalContext.Bind(Techniques::CommonResources()._dssDisable);
metalContext.Bind(Techniques::CommonResources()._cullDisable);
metalContext.Bind(Metal::Topology::PointList);
metalContext.Bind(MakeResourceList(box._triangleBufferVB), strides[0], offsets[0]);
metalContext.Bind(
MakeResourceList(box._dummyRTV), nullptr,
MakeResourceList(box._gridBufferUAV, box._listsBufferUAV));
metalContext.DrawAuto();
CATCH_ASSETS_END(parserContext)
metalContext.Bind(Metal::Topology::TriangleList);
savedTargets.ResetToOldTargets(metalContext);
preparedResult._listHeadSRV = box._gridBufferSRV;
preparedResult._linkedListsSRV = box._listsBufferSRV;
preparedResult._trianglesSRV = box._triangleBufferSRV;
return std::move(preparedResult);
}
void AmbientOcclusion_Render( Metal::DeviceContext* context,
LightingParserContext& parserContext,
AmbientOcclusionResources& resources,
Metal::ShaderResourceView& depthBuffer,
Metal::ShaderResourceView* normalsBuffer,
const Metal::ViewportDesc& mainViewport)
{
// Not working for orthogonal projection matrices
if (IsOrthogonalProjection(parserContext.GetProjectionDesc()._cameraToProjection))
return;
static float SceneScale = 1.f;
//
// See nvidia header on documentation for interface to NVSSAO
// Note that MSAA behaviour is a little strange. the nvidia library
// will take a MSAA render target as input, but will write out
// non-MSAA data. So we can't blend directly to a MSAA buffer (
// blending a non-MSAA buffer with a MSAA buffer will remove the
// samples information!)
//
GFSDK_SSAO_InputData_D3D11 inputData;
auto projectionMatrixTranspose = parserContext.GetProjectionDesc()._cameraToProjection;
inputData.DepthData.DepthTextureType = GFSDK_SSAO_HARDWARE_DEPTHS;
inputData.DepthData.ProjectionMatrix.Data = GFSDK_SSAO_Float4x4((const float*)&projectionMatrixTranspose);
inputData.DepthData.ProjectionMatrix.Layout = GFSDK_SSAO_COLUMN_MAJOR_ORDER;
inputData.DepthData.pFullResDepthTextureSRV = depthBuffer.GetUnderlying();
inputData.DepthData.MetersToViewSpaceUnits = SceneScale;
inputData.DepthData.Viewport.Enable = true;
inputData.DepthData.Viewport.TopLeftX = (GFSDK_SSAO_UINT)mainViewport.TopLeftX;
inputData.DepthData.Viewport.TopLeftY = (GFSDK_SSAO_UINT)mainViewport.TopLeftY;
inputData.DepthData.Viewport.Width = (GFSDK_SSAO_UINT)mainViewport.Width;
inputData.DepthData.Viewport.Height = (GFSDK_SSAO_UINT)mainViewport.Height;
inputData.DepthData.Viewport.MinDepth = mainViewport.MinDepth;
inputData.DepthData.Viewport.MaxDepth = mainViewport.MaxDepth;
if (resources._useNormals && normalsBuffer) {
if (resources._normalsResolveFormat != Metal::NativeFormat::Unknown) {
context->GetUnderlying()->ResolveSubresource(
resources._resolvedNormals.get(), 0,
Metal::ExtractResource<ID3D::Resource>(normalsBuffer->GetUnderlying()).get(), 0,
Metal::AsDXGIFormat(resources._normalsResolveFormat));
inputData.NormalData.pFullResNormalTextureSRV = resources._resolvedNormalsSRV.GetUnderlying();
} else {
inputData.NormalData.pFullResNormalTextureSRV = normalsBuffer->GetUnderlying();
}
// when using UNORM normal data, use:
// inputData.NormalData.DecodeScale = 2.f;
// inputData.NormalData.DecodeBias = -1.f;
assert(Metal::GetComponentType(
Metal::AsNativeFormat(Metal::TextureDesc2D(normalsBuffer->GetUnderlying()).Format))
== Metal::FormatComponentType::SNorm);
inputData.NormalData.DecodeScale = 1.f;
inputData.NormalData.DecodeBias = 0.f;
auto worldToView = InvertOrthonormalTransform(parserContext.GetProjectionDesc()._cameraToWorld);
worldToView(2, 0) = -worldToView(2, 0);
worldToView(2, 1) = -worldToView(2, 1);
worldToView(2, 2) = -worldToView(2, 2);
worldToView(2, 3) = -worldToView(2, 3);
inputData.NormalData.WorldToViewMatrix.Data = GFSDK_SSAO_Float4x4((float*)&worldToView);
inputData.NormalData.WorldToViewMatrix.Layout = GFSDK_SSAO_COLUMN_MAJOR_ORDER;
inputData.NormalData.Enable = true;
}
context->InvalidateCachedState(); // (nvidia code might change some states)
// Getting a warning message here if the pixel shader used
// immediately before this point uses class instances. Seems to
// be ok if we unbind the pixel shader first.
context->Unbind<RenderCore::Metal::PixelShader>();
context->Unbind<RenderCore::Metal::VertexShader>();
context->Unbind<RenderCore::Metal::GeometryShader>();
auto parameters = BuildAOParameters();
auto status = resources._aoContext->RenderAO(
context->GetUnderlying(),
&inputData, ¶meters,
resources._aoTarget.GetUnderlying());
assert(status == GFSDK_SSAO_OK); (void)status;
if (Tweakable("AODebugging", false)) {
parserContext._pendingOverlays.push_back(
std::bind(&AmbientOcclusion_DrawDebugging, std::placeholders::_1, std::ref(resources)));
}
}