void BuildShader()
{
var activeNodeList = Graphing.ListPool <AbstractMaterialNode> .Get();
NodeUtils.DepthFirstCollectNodesFromNode(activeNodeList, m_OutputNode);
var shaderProperties = new PropertyCollector();
var shaderKeywords = new KeywordCollector();
m_GraphData.CollectShaderProperties(shaderProperties, m_Mode);
m_GraphData.CollectShaderKeywords(shaderKeywords, m_Mode);
if (m_GraphData.GetKeywordPermutationCount() > ShaderGraphPreferences.variantLimit)
{
m_GraphData.AddValidationError(m_OutputNode.guid, ShaderKeyword.kVariantLimitWarning, Rendering.ShaderCompilerMessageSeverity.Error);
m_ConfiguredTextures = shaderProperties.GetConfiguredTexutres();
m_Builder.AppendLines(ShaderGraphImporter.k_ErrorShader);
}
GetTargetImplementations();
foreach (var activeNode in activeNodeList.OfType <AbstractMaterialNode>())
{
activeNode.CollectShaderProperties(shaderProperties, m_Mode);
}
m_Builder.AppendLine(@"Shader ""{0}""", m_Name);
using (m_Builder.BlockScope())
{
GenerationUtils.GeneratePropertiesBlock(m_Builder, shaderProperties, shaderKeywords, m_Mode);
for (int i = 0; i < m_TargetImplementations.Length; i++)
{
TargetSetupContext context = new TargetSetupContext();
context.SetMasterNode(m_OutputNode as IMasterNode);
// Instead of setup target, we can also just do get context
m_TargetImplementations[i].SetupTarget(ref context);
GetAssetDependencyPaths(context);
GenerateSubShader(i, context.descriptor);
}
// Either grab the pipeline default for the active node or the user override
if (m_OutputNode is ICanChangeShaderGUI canChangeShaderGui)
{
string customEditor = GenerationUtils.FinalCustomEditorString(canChangeShaderGui);
if (customEditor != null)
{
m_Builder.AppendLine("CustomEditor \"" + customEditor + "\"");
}
}
m_Builder.AppendLine(@"FallBack ""Hidden/Shader Graph/FallbackError""");
}
m_ConfiguredTextures = shaderProperties.GetConfiguredTexutres();
}
public static GenerationResults GetShader(this GraphData graph, AbstractMaterialNode node, GenerationMode mode, string name)
{
// ----------------------------------------------------- //
// SETUP //
// ----------------------------------------------------- //
// -------------------------------------
// String builders
var finalShader = new ShaderStringBuilder();
var results = new GenerationResults();
var shaderProperties = new PropertyCollector();
var shaderKeywords = new KeywordCollector();
var shaderPropertyUniforms = new ShaderStringBuilder();
var shaderKeywordDeclarations = new ShaderStringBuilder();
var shaderKeywordPermutations = new ShaderStringBuilder(1);
var functionBuilder = new ShaderStringBuilder();
var functionRegistry = new FunctionRegistry(functionBuilder);
var vertexDescriptionFunction = new ShaderStringBuilder(0);
var surfaceDescriptionInputStruct = new ShaderStringBuilder(0);
var surfaceDescriptionStruct = new ShaderStringBuilder(0);
var surfaceDescriptionFunction = new ShaderStringBuilder(0);
var vertexInputs = new ShaderStringBuilder(0);
graph.CollectShaderKeywords(shaderKeywords, mode);
if (graph.GetKeywordPermutationCount() > ShaderGraphPreferences.variantLimit)
{
graph.AddValidationError(node.tempId, ShaderKeyword.kVariantLimitWarning, Rendering.ShaderCompilerMessageSeverity.Error);
results.configuredTextures = shaderProperties.GetConfiguredTexutres();
results.shader = string.Empty;
return(results);
}
// -------------------------------------
// Get Slot and Node lists
var activeNodeList = ListPool <AbstractMaterialNode> .Get();
NodeUtils.DepthFirstCollectNodesFromNode(activeNodeList, node);
var slots = new List <MaterialSlot>();
if (node is IMasterNode || node is SubGraphOutputNode)
{
slots.AddRange(node.GetInputSlots <MaterialSlot>());
}
else
{
var outputSlots = node.GetOutputSlots <MaterialSlot>().ToList();
if (outputSlots.Count > 0)
{
slots.Add(outputSlots[0]);
}
}
// -------------------------------------
// Get Requirements
var requirements = ShaderGraphRequirements.FromNodes(activeNodeList, ShaderStageCapability.Fragment);
// ----------------------------------------------------- //
// KEYWORDS //
// ----------------------------------------------------- //
// -------------------------------------
// Get keyword permutations
graph.CollectShaderKeywords(shaderKeywords, mode);
// Track permutation indicies for all nodes and requirements
List <int>[] keywordPermutationsPerNode = new List <int> [activeNodeList.Count];
// -------------------------------------
// Evaluate all permutations
for (int i = 0; i < shaderKeywords.permutations.Count; i++)
{
// Get active nodes for this permutation
var localNodes = ListPool <AbstractMaterialNode> .Get();
NodeUtils.DepthFirstCollectNodesFromNode(localNodes, node, keywordPermutation: shaderKeywords.permutations[i]);
// Track each pixel node in this permutation
foreach (AbstractMaterialNode pixelNode in localNodes)
{
int nodeIndex = activeNodeList.IndexOf(pixelNode);
if (keywordPermutationsPerNode[nodeIndex] == null)
{
keywordPermutationsPerNode[nodeIndex] = new List <int>();
}
keywordPermutationsPerNode[nodeIndex].Add(i);
}
// Get active requirements for this permutation
var localSurfaceRequirements = ShaderGraphRequirements.FromNodes(localNodes, ShaderStageCapability.Fragment, false);
var localPixelRequirements = ShaderGraphRequirements.FromNodes(localNodes, ShaderStageCapability.Fragment);
}
// ----------------------------------------------------- //
// START VERTEX DESCRIPTION //
// ----------------------------------------------------- //
// -------------------------------------
// Generate Vertex Description function
vertexDescriptionFunction.AppendLine("GraphVertexInput PopulateVertexData(GraphVertexInput v)");
using (vertexDescriptionFunction.BlockScope())
{
vertexDescriptionFunction.AppendLine("return v;");
}
// ----------------------------------------------------- //
// START SURFACE DESCRIPTION //
// ----------------------------------------------------- //
// -------------------------------------
// Generate Input structure for Surface Description function
// Surface Description Input requirements are needed to exclude intermediate translation spaces
GenerateSurfaceInputStruct(surfaceDescriptionInputStruct, requirements, "SurfaceDescriptionInputs");
results.previewMode = PreviewMode.Preview2D;
foreach (var pNode in activeNodeList)
{
if (pNode.previewMode == PreviewMode.Preview3D)
{
results.previewMode = PreviewMode.Preview3D;
break;
}
}
// -------------------------------------
// Generate Output structure for Surface Description function
GenerateSurfaceDescriptionStruct(surfaceDescriptionStruct, slots, useIdsInNames: !(node is IMasterNode));
// -------------------------------------
// Generate Surface Description function
GenerateSurfaceDescriptionFunction(
activeNodeList,
keywordPermutationsPerNode,
node,
graph,
surfaceDescriptionFunction,
functionRegistry,
shaderProperties,
shaderKeywords,
mode,
outputIdProperty: results.outputIdProperty);
// ----------------------------------------------------- //
// GENERATE VERTEX > PIXEL PIPELINE //
// ----------------------------------------------------- //
// -------------------------------------
// Keyword declarations
shaderKeywords.GetKeywordsDeclaration(shaderKeywordDeclarations, mode);
// -------------------------------------
// Property uniforms
shaderProperties.GetPropertiesDeclaration(shaderPropertyUniforms, mode, graph.concretePrecision);
// -------------------------------------
// Generate Input structure for Vertex shader
GenerateApplicationVertexInputs(requirements, vertexInputs);
// ----------------------------------------------------- //
// FINALIZE //
// ----------------------------------------------------- //
// -------------------------------------
// Build final shader
finalShader.AppendLine(@"Shader ""{0}""", name);
using (finalShader.BlockScope())
{
SubShaderGenerator.GeneratePropertiesBlock(finalShader, shaderProperties, shaderKeywords, mode);
finalShader.AppendNewLine();
finalShader.AppendLine(@"HLSLINCLUDE");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.render-pipelines.core/ShaderLibrary/Packing.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.render-pipelines.core/ShaderLibrary/NormalSurfaceGradient.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.render-pipelines.core/ShaderLibrary/UnityInstancing.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.render-pipelines.core/ShaderLibrary/EntityLighting.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.shadergraph/ShaderGraphLibrary/ShaderVariables.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.shadergraph/ShaderGraphLibrary/ShaderVariablesFunctions.hlsl""");
finalShader.AppendLine(@"#include ""Assets/Scripts/URP/com.unity.shadergraph/ShaderGraphLibrary/Functions.hlsl""");
finalShader.AppendLines(shaderKeywordDeclarations.ToString());
finalShader.AppendLine(@"#define SHADERGRAPH_PREVIEW 1");
finalShader.AppendNewLine();
finalShader.AppendLines(shaderKeywordPermutations.ToString());
finalShader.AppendLines(shaderPropertyUniforms.ToString());
finalShader.AppendNewLine();
finalShader.AppendLines(surfaceDescriptionInputStruct.ToString());
finalShader.AppendNewLine();
finalShader.Concat(functionBuilder);
finalShader.AppendNewLine();
finalShader.AppendLines(surfaceDescriptionStruct.ToString());
finalShader.AppendNewLine();
finalShader.AppendLines(surfaceDescriptionFunction.ToString());
finalShader.AppendNewLine();
finalShader.AppendLines(vertexInputs.ToString());
finalShader.AppendNewLine();
finalShader.AppendLines(vertexDescriptionFunction.ToString());
finalShader.AppendNewLine();
finalShader.AppendLine(@"ENDHLSL");
finalShader.AppendLines(ShaderGenerator.GetPreviewSubShader(node, requirements));
ListPool <AbstractMaterialNode> .Release(activeNodeList);
}
// -------------------------------------
// Finalize
results.configuredTextures = shaderProperties.GetConfiguredTexutres();
ShaderSourceMap sourceMap;
results.shader = finalShader.ToString(out sourceMap);
results.sourceMap = sourceMap;
return(results);
}