Initial font work

apps/LoopThroughWithOpenGLCompositing/RuntimeParameterUtils.cpp

@@ -36,6 +36,21 @@ std::vector<double> JsonArrayToNumbers(const JsonValue& value)
 	}
 	return numbers;
 }
+
+std::string NormalizeTextValue(const std::string& text, unsigned maxLength)
+{
+	std::string normalized;
+	normalized.reserve(std::min<std::size_t>(text.size(), maxLength));
+	for (unsigned char ch : text)
+	{
+		if (ch < 32 || ch > 126)
+			continue;
+		if (normalized.size() >= maxLength)
+			break;
+		normalized.push_back(static_cast<char>(ch));
+	}
+	return normalized;
+}
 }
 
 std::string MakeSafePresetFileStem(const std::string& presetName)
@@ -82,6 +97,9 @@ ShaderParameterValue DefaultValueForDefinition(const ShaderParameterDefinition&
 	case ShaderParameterType::Enum:
 		value.enumValue = definition.defaultEnumValue;
 		break;
+	case ShaderParameterType::Text:
+		value.textValue = NormalizeTextValue(definition.defaultTextValue, definition.maxLength);
+		break;
 	}
 	return value;
 }
@@ -164,6 +182,14 @@ bool NormalizeAndValidateParameterValue(const ShaderParameterDefinition& definit
 		error = "Enum parameter '" + definition.id + "' received unsupported option '" + selectedValue + "'.";
 		return false;
 	}
+	case ShaderParameterType::Text:
+		if (!value.isString())
+		{
+			error = "Expected string value for text parameter '" + definition.id + "'.";
+			return false;
+		}
+		normalizedValue.textValue = NormalizeTextValue(value.asString(), definition.maxLength);
+		return true;
 	}
 
 	return false;