refactor

apps/LoopThroughWithOpenGLCompositing/RuntimeParameterUtils.cpp

@@ -0,0 +1,170 @@
+#include "stdafx.h"
+#include "RuntimeParameterUtils.h"
+
+#include <algorithm>
+#include <cmath>
+#include <cctype>
+#include <vector>
+
+namespace
+{
+std::string TrimText(const std::string& text)
+{
+	std::size_t start = 0;
+	while (start < text.size() && std::isspace(static_cast<unsigned char>(text[start])))
+		++start;
+
+	std::size_t end = text.size();
+	while (end > start && std::isspace(static_cast<unsigned char>(text[end - 1])))
+		--end;
+
+	return text.substr(start, end - start);
+}
+
+bool IsFiniteNumber(double value)
+{
+	return std::isfinite(value) != 0;
+}
+
+std::vector<double> JsonArrayToNumbers(const JsonValue& value)
+{
+	std::vector<double> numbers;
+	for (const JsonValue& item : value.asArray())
+	{
+		if (item.isNumber())
+			numbers.push_back(item.asNumber());
+	}
+	return numbers;
+}
+}
+
+std::string MakeSafePresetFileStem(const std::string& presetName)
+{
+	std::string trimmed = TrimText(presetName);
+	std::string safe;
+	safe.reserve(trimmed.size());
+
+	for (unsigned char ch : trimmed)
+	{
+		if (std::isalnum(ch))
+			safe.push_back(static_cast<char>(std::tolower(ch)));
+		else if (ch == ' ' || ch == '-' || ch == '_')
+		{
+			if (safe.empty() || safe.back() == '-')
+				continue;
+			safe.push_back('-');
+		}
+	}
+
+	while (!safe.empty() && safe.back() == '-')
+		safe.pop_back();
+
+	return safe;
+}
+
+ShaderParameterValue DefaultValueForDefinition(const ShaderParameterDefinition& definition)
+{
+	ShaderParameterValue value;
+	switch (definition.type)
+	{
+	case ShaderParameterType::Float:
+		value.numberValues = definition.defaultNumbers.empty() ? std::vector<double>{ 0.0 } : definition.defaultNumbers;
+		break;
+	case ShaderParameterType::Vec2:
+		value.numberValues = definition.defaultNumbers.size() == 2 ? definition.defaultNumbers : std::vector<double>{ 0.0, 0.0 };
+		break;
+	case ShaderParameterType::Color:
+		value.numberValues = definition.defaultNumbers.size() == 4 ? definition.defaultNumbers : std::vector<double>{ 1.0, 1.0, 1.0, 1.0 };
+		break;
+	case ShaderParameterType::Boolean:
+		value.booleanValue = definition.defaultBoolean;
+		break;
+	case ShaderParameterType::Enum:
+		value.enumValue = definition.defaultEnumValue;
+		break;
+	}
+	return value;
+}
+
+bool NormalizeAndValidateParameterValue(const ShaderParameterDefinition& definition, const JsonValue& value, ShaderParameterValue& normalizedValue, std::string& error)
+{
+	normalizedValue = DefaultValueForDefinition(definition);
+
+	switch (definition.type)
+	{
+	case ShaderParameterType::Float:
+	{
+		if (!value.isNumber())
+		{
+			error = "Expected numeric value for float parameter '" + definition.id + "'.";
+			return false;
+		}
+		double number = value.asNumber();
+		if (!IsFiniteNumber(number))
+		{
+			error = "Float parameter '" + definition.id + "' must be finite.";
+			return false;
+		}
+		if (!definition.minNumbers.empty())
+			number = std::max(number, definition.minNumbers.front());
+		if (!definition.maxNumbers.empty())
+			number = std::min(number, definition.maxNumbers.front());
+		normalizedValue.numberValues = { number };
+		return true;
+	}
+	case ShaderParameterType::Vec2:
+	case ShaderParameterType::Color:
+	{
+		std::vector<double> numbers = JsonArrayToNumbers(value);
+		const std::size_t expectedSize = definition.type == ShaderParameterType::Vec2 ? 2 : 4;
+		if (numbers.size() != expectedSize)
+		{
+			error = "Expected array value of size " + std::to_string(expectedSize) + " for parameter '" + definition.id + "'.";
+			return false;
+		}
+		for (std::size_t index = 0; index < numbers.size(); ++index)
+		{
+			if (!IsFiniteNumber(numbers[index]))
+			{
+				error = "Parameter '" + definition.id + "' contains a non-finite value.";
+				return false;
+			}
+			if (index < definition.minNumbers.size())
+				numbers[index] = std::max(numbers[index], definition.minNumbers[index]);
+			if (index < definition.maxNumbers.size())
+				numbers[index] = std::min(numbers[index], definition.maxNumbers[index]);
+		}
+		normalizedValue.numberValues = numbers;
+		return true;
+	}
+	case ShaderParameterType::Boolean:
+		if (!value.isBoolean())
+		{
+			error = "Expected boolean value for parameter '" + definition.id + "'.";
+			return false;
+		}
+		normalizedValue.booleanValue = value.asBoolean();
+		return true;
+	case ShaderParameterType::Enum:
+	{
+		if (!value.isString())
+		{
+			error = "Expected string value for enum parameter '" + definition.id + "'.";
+			return false;
+		}
+		const std::string selectedValue = value.asString();
+		for (const ShaderParameterOption& option : definition.enumOptions)
+		{
+			if (option.value == selectedValue)
+			{
+				normalizedValue.enumValue = selectedValue;
+				return true;
+			}
+		}
+		error = "Enum parameter '" + definition.id + "' received unsupported option '" + selectedValue + "'.";
+		return false;
+	}
+	}
+
+	return false;
+}