static void ProcessSubGraph(SubGraphAsset asset, GraphData graph)
{
var registry = new FunctionRegistry(new ShaderStringBuilder(), true);
registry.names.Clear();
asset.functions.Clear();
asset.nodeProperties.Clear();
asset.isValid = true;
graph.OnEnable();
graph.messageManager.ClearAll();
graph.ValidateGraph();
var assetPath = AssetDatabase.GUIDToAssetPath(asset.assetGuid);
asset.hlslName = NodeUtils.GetHLSLSafeName(Path.GetFileNameWithoutExtension(assetPath));
asset.inputStructName = $"Bindings_{asset.hlslName}_{asset.assetGuid}";
asset.functionName = $"SG_{asset.hlslName}_{asset.assetGuid}";
asset.path = graph.path;
var outputNode = (SubGraphOutputNode)graph.outputNode;
asset.outputs.Clear();
outputNode.GetInputSlots(asset.outputs);
List <AbstractMaterialNode> nodes = new List <AbstractMaterialNode>();
NodeUtils.DepthFirstCollectNodesFromNode(nodes, outputNode);
asset.effectiveShaderStage = ShaderStageCapability.All;
foreach (var slot in asset.outputs)
{
var stage = NodeUtils.GetEffectiveShaderStageCapability(slot, true);
if (stage != ShaderStageCapability.All)
{
asset.effectiveShaderStage = stage;
break;
}
}
asset.requirements = ShaderGraphRequirements.FromNodes(nodes, asset.effectiveShaderStage, false);
asset.inputs = graph.properties.ToList();
asset.graphPrecision = graph.concretePrecision;
asset.outputPrecision = outputNode.concretePrecision;
GatherFromGraph(assetPath, out var containsCircularDependency, out var descendents);
asset.descendents.AddRange(descendents);
var childrenSet = new HashSet <string>();
var anyErrors = false;
foreach (var node in nodes)
{
if (node is SubGraphNode subGraphNode)
{
var subGraphGuid = subGraphNode.subGraphGuid;
if (childrenSet.Add(subGraphGuid))
{
asset.children.Add(subGraphGuid);
}
}
if (node.hasError)
{
anyErrors = true;
}
}
if (!anyErrors && containsCircularDependency)
{
Debug.LogError($"Error in Graph at {assetPath}: Sub Graph contains a circular dependency.", asset);
anyErrors = true;
}
if (anyErrors)
{
asset.isValid = false;
registry.ProvideFunction(asset.functionName, sb => { });
return;
}
foreach (var node in nodes)
{
if (node is IGeneratesFunction generatesFunction)
{
registry.builder.currentNode = node;
generatesFunction.GenerateNodeFunction(registry, new GraphContext(asset.inputStructName), GenerationMode.ForReals);
registry.builder.ReplaceInCurrentMapping(PrecisionUtil.Token, node.concretePrecision.ToShaderString());
}
}
registry.ProvideFunction(asset.functionName, sb =>
{
var graphContext = new GraphContext(asset.inputStructName);
GraphUtil.GenerateSurfaceInputStruct(sb, asset.requirements, asset.inputStructName);
sb.AppendNewLine();
// Generate arguments... first INPUTS
var arguments = new List <string>();
foreach (var prop in asset.inputs)
{
prop.ValidateConcretePrecision(asset.graphPrecision);
arguments.Add(string.Format("{0}", prop.GetPropertyAsArgumentString()));
}
// now pass surface inputs
arguments.Add(string.Format("{0} IN", asset.inputStructName));
// Now generate outputs
foreach (var output in asset.outputs)
{
arguments.Add($"out {output.concreteValueType.ToShaderString(asset.outputPrecision)} {output.shaderOutputName}_{output.id}");
}
// Create the function prototype from the arguments
sb.AppendLine("void {0}({1})"
, asset.functionName
, arguments.Aggregate((current, next) => $"{current}, {next}"));
// now generate the function
using (sb.BlockScope())
{
// Just grab the body from the active nodes
foreach (var node in nodes)
{
if (node is IGeneratesBodyCode generatesBodyCode)
{
sb.currentNode = node;
generatesBodyCode.GenerateNodeCode(sb, graphContext, GenerationMode.ForReals);
sb.ReplaceInCurrentMapping(PrecisionUtil.Token, node.concretePrecision.ToShaderString());
}
}
foreach (var slot in asset.outputs)
{
sb.AppendLine($"{slot.shaderOutputName}_{slot.id} = {outputNode.GetSlotValue(slot.id, GenerationMode.ForReals, asset.outputPrecision)};");
}
}
});
asset.functions.AddRange(registry.names.Select(x => new FunctionPair(x, registry.sources[x])));
var collector = new PropertyCollector();
asset.nodeProperties = collector.properties;
foreach (var node in nodes)
{
node.CollectShaderProperties(collector, GenerationMode.ForReals);
}
asset.OnBeforeSerialize();
}
static void ProcessSubGraph(Dictionary <string, SubGraphData> subGraphMap, FunctionRegistry registry, SubGraphData subGraphData, GraphData graph)
{
registry.names.Clear();
subGraphData.functionNames.Clear();
subGraphData.nodeProperties.Clear();
subGraphData.isValid = true;
graph.OnEnable();
graph.messageManager.ClearAll();
graph.ValidateGraph();
var assetPath = AssetDatabase.GUIDToAssetPath(subGraphData.assetGuid);
subGraphData.hlslName = NodeUtils.GetHLSLSafeName(Path.GetFileNameWithoutExtension(assetPath));
subGraphData.inputStructName = $"Bindings_{subGraphData.hlslName}_{subGraphData.assetGuid}";
subGraphData.functionName = $"SG_{subGraphData.hlslName}_{subGraphData.assetGuid}";
subGraphData.path = graph.path;
var outputNode = (SubGraphOutputNode)graph.outputNode;
subGraphData.outputs.Clear();
outputNode.GetInputSlots(subGraphData.outputs);
List <AbstractMaterialNode> nodes = new List <AbstractMaterialNode>();
NodeUtils.DepthFirstCollectNodesFromNode(nodes, outputNode);
subGraphData.effectiveShaderStage = ShaderStageCapability.All;
foreach (var slot in subGraphData.outputs)
{
var stage = NodeUtils.GetEffectiveShaderStageCapability(slot, true);
if (stage != ShaderStageCapability.All)
{
subGraphData.effectiveShaderStage = stage;
break;
}
}
subGraphData.requirements = ShaderGraphRequirements.FromNodes(nodes, subGraphData.effectiveShaderStage, false);
subGraphData.inputs = graph.properties.ToList();
foreach (var node in nodes)
{
if (node.hasError)
{
subGraphData.isValid = false;
registry.ProvideFunction(subGraphData.functionName, sb => { });
return;
}
}
foreach (var node in nodes)
{
if (node is SubGraphNode subGraphNode)
{
var nestedData = subGraphMap[subGraphNode.subGraphGuid];
foreach (var functionName in nestedData.functionNames)
{
registry.names.Add(functionName);
}
}
else if (node is IGeneratesFunction generatesFunction)
{
generatesFunction.GenerateNodeFunction(registry, new GraphContext(subGraphData.inputStructName), GenerationMode.ForReals);
}
}
registry.ProvideFunction(subGraphData.functionName, sb =>
{
var graphContext = new GraphContext(subGraphData.inputStructName);
GraphUtil.GenerateSurfaceInputStruct(sb, subGraphData.requirements, subGraphData.inputStructName);
sb.AppendNewLine();
// Generate arguments... first INPUTS
var arguments = new List <string>();
foreach (var prop in subGraphData.inputs)
{
arguments.Add(string.Format("{0}", prop.GetPropertyAsArgumentString()));
}
// now pass surface inputs
arguments.Add(string.Format("{0} IN", subGraphData.inputStructName));
// Now generate outputs
foreach (var output in subGraphData.outputs)
{
arguments.Add($"out {output.concreteValueType.ToString(outputNode.precision)} {output.shaderOutputName}_{output.id}");
}
// Create the function prototype from the arguments
sb.AppendLine("void {0}({1})"
, subGraphData.functionName
, arguments.Aggregate((current, next) => $"{current}, {next}"));
// now generate the function
using (sb.BlockScope())
{
// Just grab the body from the active nodes
var bodyGenerator = new ShaderGenerator();
foreach (var node in nodes)
{
if (node is IGeneratesBodyCode)
{
(node as IGeneratesBodyCode).GenerateNodeCode(bodyGenerator, graphContext, GenerationMode.ForReals);
}
}
foreach (var slot in subGraphData.outputs)
{
bodyGenerator.AddShaderChunk($"{slot.shaderOutputName}_{slot.id} = {outputNode.GetSlotValue(slot.id, GenerationMode.ForReals)};");
}
sb.Append(bodyGenerator.GetShaderString(1));
}
});
subGraphData.functionNames.AddRange(registry.names.Distinct());
var collector = new PropertyCollector();
subGraphData.nodeProperties = collector.properties;
foreach (var node in nodes)
{
node.CollectShaderProperties(collector, GenerationMode.ForReals);
}
subGraphData.OnBeforeSerialize();
}
