Pass 3

apps/LoopThroughWithOpenGLCompositing/runtime/RenderSnapshotBuilder.cpp

@@ -0,0 +1,208 @@
+#include "RenderSnapshotBuilder.h"
+
+#include "RuntimeClock.h"
+#include "RuntimeParameterUtils.h"
+#include "RuntimeStore.h"
+#include "ShaderCompiler.h"
+
+#include <algorithm>
+#include <chrono>
+#include <filesystem>
+#include <mutex>
+#include <utility>
+
+RenderSnapshotBuilder::RenderSnapshotBuilder(RuntimeStore& runtimeStore) :
+	mRuntimeStore(runtimeStore)
+{
+}
+
+bool RenderSnapshotBuilder::BuildLayerPassFragmentShaderSources(const std::string& layerId, std::vector<ShaderPassBuildSource>& passSources, std::string& error) const
+{
+	try
+	{
+		ShaderPackage shaderPackage;
+		if (!mRuntimeStore.CopyShaderPackageForStoredLayer(layerId, shaderPackage, error))
+			return false;
+
+		std::filesystem::path repoRoot;
+		std::filesystem::path wrapperPath;
+		std::filesystem::path generatedGlslPath;
+		std::filesystem::path patchedGlslPath;
+		unsigned maxTemporalHistoryFrames = 0;
+		mRuntimeStore.GetShaderCompilerInputs(repoRoot, wrapperPath, generatedGlslPath, patchedGlslPath, maxTemporalHistoryFrames);
+
+		ShaderCompiler compiler(
+			repoRoot,
+			wrapperPath,
+			generatedGlslPath,
+			patchedGlslPath,
+			maxTemporalHistoryFrames);
+		passSources.clear();
+		passSources.reserve(shaderPackage.passes.size());
+		for (const ShaderPassDefinition& pass : shaderPackage.passes)
+		{
+			ShaderPassBuildSource passSource;
+			passSource.passId = pass.id;
+			passSource.inputNames = pass.inputNames;
+			passSource.outputName = pass.outputName;
+			if (!compiler.BuildPassFragmentShaderSource(shaderPackage, pass, passSource.fragmentShaderSource, error))
+				return false;
+			passSources.push_back(std::move(passSource));
+		}
+		return true;
+	}
+	catch (const std::exception& exception)
+	{
+		error = std::string("RenderSnapshotBuilder::BuildLayerPassFragmentShaderSources exception: ") + exception.what();
+		return false;
+	}
+	catch (...)
+	{
+		error = "RenderSnapshotBuilder::BuildLayerPassFragmentShaderSources threw a non-standard exception.";
+		return false;
+	}
+}
+
+unsigned RenderSnapshotBuilder::GetMaxTemporalHistoryFrames() const
+{
+	return mRuntimeStore.GetConfiguredMaxTemporalHistoryFrames();
+}
+
+RuntimeSnapshotVersions RenderSnapshotBuilder::GetVersions() const
+{
+	RuntimeSnapshotVersions versions;
+	versions.renderStateVersion = mRenderStateVersion.load(std::memory_order_relaxed);
+	versions.parameterStateVersion = mParameterStateVersion.load(std::memory_order_relaxed);
+	return versions;
+}
+
+void RenderSnapshotBuilder::AdvanceFrame()
+{
+	++mFrameCounter;
+}
+
+void RenderSnapshotBuilder::BuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const
+{
+	std::lock_guard<std::mutex> lock(mRuntimeStore.mMutex);
+	BuildLayerRenderStatesLocked(outputWidth, outputHeight, states);
+}
+
+bool RenderSnapshotBuilder::TryBuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const
+{
+	std::unique_lock<std::mutex> lock(mRuntimeStore.mMutex, std::try_to_lock);
+	if (!lock.owns_lock())
+		return false;
+
+	BuildLayerRenderStatesLocked(outputWidth, outputHeight, states);
+	return true;
+}
+
+bool RenderSnapshotBuilder::TryRefreshLayerParameters(std::vector<RuntimeRenderState>& states) const
+{
+	std::unique_lock<std::mutex> lock(mRuntimeStore.mMutex, std::try_to_lock);
+	if (!lock.owns_lock())
+		return false;
+
+	RefreshLayerParametersLocked(states);
+	return true;
+}
+
+void RenderSnapshotBuilder::RefreshDynamicRenderStateFields(std::vector<RuntimeRenderState>& states) const
+{
+	std::lock_guard<std::mutex> lock(mRuntimeStore.mMutex);
+	RefreshDynamicRenderStateFieldsLocked(states);
+}
+
+void RenderSnapshotBuilder::MarkRenderStateDirty()
+{
+	mRenderStateVersion.fetch_add(1, std::memory_order_relaxed);
+	mParameterStateVersion.fetch_add(1, std::memory_order_relaxed);
+}
+
+void RenderSnapshotBuilder::MarkParameterStateDirty()
+{
+	mParameterStateVersion.fetch_add(1, std::memory_order_relaxed);
+}
+
+void RenderSnapshotBuilder::BuildLayerRenderStatesLocked(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const
+{
+	states.clear();
+	const HealthTelemetry::SignalStatusSnapshot signalStatus = mRuntimeStore.mHealthTelemetry.GetSignalStatusSnapshot();
+
+	for (const RuntimeStore::LayerPersistentState& layer : mRuntimeStore.mLayerStack.Layers())
+	{
+		const ShaderPackage* shaderPackage = mRuntimeStore.mShaderCatalog.FindPackage(layer.shaderId);
+		if (!shaderPackage)
+			continue;
+
+		RuntimeRenderState state;
+		state.layerId = layer.id;
+		state.shaderId = layer.shaderId;
+		state.shaderName = shaderPackage->displayName;
+		state.mixAmount = 1.0;
+		state.bypass = layer.bypass ? 1.0 : 0.0;
+		state.inputWidth = signalStatus.width;
+		state.inputHeight = signalStatus.height;
+		state.outputWidth = outputWidth;
+		state.outputHeight = outputHeight;
+		state.parameterDefinitions = shaderPackage->parameters;
+		state.textureAssets = shaderPackage->textureAssets;
+		state.fontAssets = shaderPackage->fontAssets;
+		state.isTemporal = shaderPackage->temporal.enabled;
+		state.temporalHistorySource = shaderPackage->temporal.historySource;
+		state.requestedTemporalHistoryLength = shaderPackage->temporal.requestedHistoryLength;
+		state.effectiveTemporalHistoryLength = shaderPackage->temporal.effectiveHistoryLength;
+		state.feedback = shaderPackage->feedback;
+
+		for (const ShaderParameterDefinition& definition : shaderPackage->parameters)
+		{
+			ShaderParameterValue value = DefaultValueForDefinition(definition);
+			auto valueIt = layer.parameterValues.find(definition.id);
+			if (valueIt != layer.parameterValues.end())
+				value = valueIt->second;
+			state.parameterValues[definition.id] = value;
+		}
+
+		states.push_back(state);
+	}
+
+	RefreshDynamicRenderStateFieldsLocked(states);
+}
+
+void RenderSnapshotBuilder::RefreshLayerParametersLocked(std::vector<RuntimeRenderState>& states) const
+{
+	for (RuntimeRenderState& state : states)
+	{
+		const auto layerIt = std::find_if(mRuntimeStore.mLayerStack.Layers().begin(), mRuntimeStore.mLayerStack.Layers().end(),
+			[&state](const RuntimeStore::LayerPersistentState& layer) { return layer.id == state.layerId; });
+		if (layerIt == mRuntimeStore.mLayerStack.Layers().end())
+			continue;
+
+		state.bypass = layerIt->bypass ? 1.0 : 0.0;
+		state.parameterValues.clear();
+		for (const ShaderParameterDefinition& definition : state.parameterDefinitions)
+		{
+			ShaderParameterValue value = DefaultValueForDefinition(definition);
+			auto valueIt = layerIt->parameterValues.find(definition.id);
+			if (valueIt != layerIt->parameterValues.end())
+				value = valueIt->second;
+			state.parameterValues[definition.id] = value;
+		}
+	}
+}
+
+void RenderSnapshotBuilder::RefreshDynamicRenderStateFieldsLocked(std::vector<RuntimeRenderState>& states) const
+{
+	const RuntimeClockSnapshot clock = GetRuntimeClockSnapshot();
+	const double timeSeconds = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::steady_clock::now() - mRuntimeStore.mStartTime).count();
+	const double frameCount = static_cast<double>(mFrameCounter.load(std::memory_order_relaxed));
+
+	for (RuntimeRenderState& state : states)
+	{
+		state.timeSeconds = timeSeconds;
+		state.utcTimeSeconds = clock.utcTimeSeconds;
+		state.utcOffsetSeconds = clock.utcOffsetSeconds;
+		state.startupRandom = mRuntimeStore.mStartupRandom;
+		state.frameCount = frameCount;
+	}
+}