Added trigger

apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeHost.cpp

@@ -136,6 +136,7 @@ std::string ShaderParameterTypeToString(ShaderParameterType type)
 	case ShaderParameterType::Boolean: return "bool";
 	case ShaderParameterType::Enum: return "enum";
 	case ShaderParameterType::Text: return "text";
+	case ShaderParameterType::Trigger: return "trigger";
 	}
 	return "unknown";
 }
@@ -187,6 +188,11 @@ bool ParseShaderParameterType(const std::string& typeName, ShaderParameterType&
 		type = ShaderParameterType::Text;
 		return true;
 	}
+	if (typeName == "trigger")
+	{
+		type = ShaderParameterType::Trigger;
+		return true;
+	}
 	return false;
 }
 
@@ -1011,6 +1017,15 @@ bool RuntimeHost::UpdateLayerParameter(const std::string& layerId, const std::st
 		return false;
 	}
 
+	if (parameterIt->type == ShaderParameterType::Trigger)
+	{
+		ShaderParameterValue& value = layer->parameterValues[parameterId];
+		const double previousCount = value.numberValues.empty() ? 0.0 : value.numberValues[0];
+		const double triggerTime = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::steady_clock::now() - mStartTime).count();
+		value.numberValues = { previousCount + 1.0, triggerTime };
+		return true;
+	}
+
 	ShaderParameterValue normalized;
 	if (!NormalizeAndValidateValue(*parameterIt, newValue, normalized, error))
 		return false;
@@ -1057,6 +1072,15 @@ bool RuntimeHost::UpdateLayerParameterByControlKey(const std::string& layerKey,
 		return false;
 	}
 
+	if (parameterIt->type == ShaderParameterType::Trigger)
+	{
+		ShaderParameterValue& value = matchedLayer->parameterValues[parameterIt->id];
+		const double previousCount = value.numberValues.empty() ? 0.0 : value.numberValues[0];
+		const double triggerTime = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::steady_clock::now() - mStartTime).count();
+		value.numberValues = { previousCount + 1.0, triggerTime };
+		return true;
+	}
+
 	ShaderParameterValue normalized;
 	if (!NormalizeAndValidateValue(*parameterIt, newValue, normalized, error))
 		return false;
@@ -1714,6 +1738,12 @@ void RuntimeHost::EnsureLayerDefaultsLocked(LayerPersistentState& layerState, co
 			}
 			break;
 		}
+		case ShaderParameterType::Trigger:
+			if (valueIt->second.numberValues.empty())
+				valueJson = JsonValue(0.0);
+			else
+				valueJson = JsonValue(std::max(0.0, std::floor(valueIt->second.numberValues.front())));
+			break;
 		}
 
 		if (!shouldNormalize)
@@ -2103,6 +2133,8 @@ JsonValue RuntimeHost::SerializeParameterValue(const ShaderParameterDefinition&
 		return JsonValue(value.enumValue);
 	case ShaderParameterType::Text:
 		return JsonValue(value.textValue);
+	case ShaderParameterType::Trigger:
+		return JsonValue(value.numberValues.empty() ? 0.0 : value.numberValues.front());
 	case ShaderParameterType::Float:
 		return JsonValue(value.numberValues.empty() ? 0.0 : value.numberValues.front());
 	case ShaderParameterType::Vec2: