Pass 3

apps/LoopThroughWithOpenGLCompositing/runtime/LayerStackStore.h

@@ -0,0 +1,72 @@
+#pragma once
+
+#include "RuntimeJson.h"
+#include "ShaderPackageCatalog.h"
+#include "ShaderTypes.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <map>
+#include <string>
+#include <vector>
+
+class LayerStackStore
+{
+public:
+	struct LayerPersistentState
+	{
+		std::string id;
+		std::string shaderId;
+		bool bypass = false;
+		std::map<std::string, ShaderParameterValue> parameterValues;
+	};
+
+	struct StoredParameterSnapshot
+	{
+		std::string layerId;
+		ShaderParameterDefinition definition;
+		ShaderParameterValue currentValue;
+		bool hasCurrentValue = false;
+	};
+
+	bool LoadPersistentStateValue(const JsonValue& root);
+	JsonValue BuildPersistentStateValue(const ShaderPackageCatalog& shaderCatalog) const;
+	void NormalizeLayerIds();
+	void EnsureDefaultsForAllLayers(const ShaderPackageCatalog& shaderCatalog);
+	void EnsureDefaultLayer(const ShaderPackageCatalog& shaderCatalog);
+	void RemoveLayersWithMissingPackages(const ShaderPackageCatalog& shaderCatalog);
+
+	bool CreateLayer(const ShaderPackageCatalog& shaderCatalog, const std::string& shaderId, std::string& error);
+	bool DeleteLayer(const std::string& layerId, std::string& error);
+	bool MoveLayer(const std::string& layerId, int direction, std::string& error);
+	bool MoveLayerToIndex(const std::string& layerId, std::size_t targetIndex, std::string& error);
+	bool SetLayerBypassState(const std::string& layerId, bool bypassed, std::string& error);
+	bool SetLayerShaderSelection(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, const std::string& shaderId, std::string& error);
+	bool SetParameterValue(const std::string& layerId, const std::string& parameterId, const ShaderParameterValue& value, std::string& error);
+	bool ResetLayerParameterValues(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, std::string& error);
+
+	bool HasLayer(const std::string& layerId) const;
+	bool TryGetParameterById(const ShaderPackageCatalog& shaderCatalog, const std::string& layerId, const std::string& parameterId, StoredParameterSnapshot& snapshot, std::string& error) const;
+	bool TryGetParameterByControlKey(const ShaderPackageCatalog& shaderCatalog, const std::string& layerKey, const std::string& parameterKey, StoredParameterSnapshot& snapshot, std::string& error) const;
+	bool ResolveLayerMove(const std::string& layerId, int direction, bool& shouldMove, std::string& error) const;
+	bool ResolveLayerMoveToIndex(const std::string& layerId, std::size_t targetIndex, bool& shouldMove, std::string& error) const;
+
+	JsonValue BuildStackPresetValue(const ShaderPackageCatalog& shaderCatalog, const std::string& presetName) const;
+	bool LoadStackPresetValue(const ShaderPackageCatalog& shaderCatalog, const JsonValue& root, std::string& error);
+	static std::string MakeSafePresetFileStem(const std::string& presetName);
+
+	const std::vector<LayerPersistentState>& Layers() const;
+	std::vector<LayerPersistentState>& Layers();
+	std::size_t LayerCount() const;
+	const LayerPersistentState* FindLayerById(const std::string& layerId) const;
+	LayerPersistentState* FindLayerById(const std::string& layerId);
+
+private:
+	static ShaderParameterValue DefaultValueForDefinition(const ShaderParameterDefinition& definition);
+	static void EnsureLayerDefaults(LayerPersistentState& layerState, const ShaderPackage& shaderPackage);
+	static bool DeserializeLayerStack(const ShaderPackageCatalog& shaderCatalog, const JsonValue& layersValue, std::vector<LayerPersistentState>& layers, uint64_t& nextLayerId, std::string& error);
+	static std::string GenerateLayerId(std::vector<LayerPersistentState>& layers, uint64_t& nextLayerId);
+
+	std::vector<LayerPersistentState> mLayers;
+	uint64_t mNextLayerId = 0;
+};