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using System.Collections.Generic;
using System.IO;
using System.Linq;
using UnityEditor.Graphing;
using UnityEngine; // Vector3,4
using UnityEditor.ShaderGraph;
namespace UnityEditor.Experimental.Rendering.HDPipeline
{
public static class HDRPShaderStructs
{
struct AttributesMesh
{
[Semantic("POSITION")] Vector3 positionOS;
[Semantic("NORMAL")][Optional] Vector3 normalOS;
[Semantic("TANGENT")][Optional] Vector4 tangentOS; // Stores bi-tangent sign in w
[Semantic("TEXCOORD0")][Optional] Vector2 uv0;
[Semantic("TEXCOORD1")][Optional] Vector2 uv1;
[Semantic("TEXCOORD2")][Optional] Vector2 uv2;
[Semantic("TEXCOORD3")][Optional] Vector2 uv3;
[Semantic("COLOR")][Optional] Vector4 color;
};
struct VaryingsMeshToPS
{
[Semantic("SV_Position")] Vector4 positionCS;
[Optional] Vector3 positionRWS;
[Optional] Vector3 normalWS;
[Optional] Vector4 tangentWS; // w contain mirror sign
[Optional] Vector2 texCoord0;
[Optional] Vector2 texCoord1;
[Optional] Vector2 texCoord2;
[Optional] Vector2 texCoord3;
[Optional] Vector4 color;
[Optional][Semantic("FRONT_FACE_SEMANTIC")][OverrideType("FRONT_FACE_TYPE")][PreprocessorIf("SHADER_STAGE_FRAGMENT")]
bool cullFace;
public static Dependency[] tessellationDependencies = new Dependency[]
{
new Dependency("VaryingsMeshToPS.positionRWS", "VaryingsMeshToDS.positionRWS"),
new Dependency("VaryingsMeshToPS.normalWS", "VaryingsMeshToDS.normalWS"),
new Dependency("VaryingsMeshToPS.tangentWS", "VaryingsMeshToDS.tangentWS"),
new Dependency("VaryingsMeshToPS.texCoord0", "VaryingsMeshToDS.texCoord0"),
new Dependency("VaryingsMeshToPS.texCoord1", "VaryingsMeshToDS.texCoord1"),
new Dependency("VaryingsMeshToPS.texCoord2", "VaryingsMeshToDS.texCoord2"),
new Dependency("VaryingsMeshToPS.texCoord3", "VaryingsMeshToDS.texCoord3"),
new Dependency("VaryingsMeshToPS.color", "VaryingsMeshToDS.color"),
};
public static Dependency[] standardDependencies = new Dependency[]
{
new Dependency("VaryingsMeshToPS.positionRWS", "AttributesMesh.positionOS"),
new Dependency("VaryingsMeshToPS.normalWS", "AttributesMesh.normalOS"),
new Dependency("VaryingsMeshToPS.tangentWS", "AttributesMesh.tangentOS"),
new Dependency("VaryingsMeshToPS.texCoord0", "AttributesMesh.uv0"),
new Dependency("VaryingsMeshToPS.texCoord1", "AttributesMesh.uv1"),
new Dependency("VaryingsMeshToPS.texCoord2", "AttributesMesh.uv2"),
new Dependency("VaryingsMeshToPS.texCoord3", "AttributesMesh.uv3"),
new Dependency("VaryingsMeshToPS.color", "AttributesMesh.color"),
};
};
struct VaryingsMeshToDS
{
Vector3 positionRWS;
Vector3 normalWS;
[Optional] Vector4 tangentWS;
[Optional] Vector2 texCoord0;
[Optional] Vector2 texCoord1;
[Optional] Vector2 texCoord2;
[Optional] Vector2 texCoord3;
[Optional] Vector4 color;
public static Dependency[] tessellationDependencies = new Dependency[]
{
new Dependency("VaryingsMeshToDS.tangentWS", "VaryingsMeshToPS.tangentWS"),
new Dependency("VaryingsMeshToDS.texCoord0", "VaryingsMeshToPS.texCoord0"),
new Dependency("VaryingsMeshToDS.texCoord1", "VaryingsMeshToPS.texCoord1"),
new Dependency("VaryingsMeshToDS.texCoord2", "VaryingsMeshToPS.texCoord2"),
new Dependency("VaryingsMeshToDS.texCoord3", "VaryingsMeshToPS.texCoord3"),
new Dependency("VaryingsMeshToDS.color", "VaryingsMeshToPS.color"),
};
};
struct FragInputs
{
public static Dependency[] dependencies = new Dependency[]
{
new Dependency("FragInputs.positionRWS", "VaryingsMeshToPS.positionRWS"),
new Dependency("FragInputs.worldToTangent", "VaryingsMeshToPS.tangentWS"),
new Dependency("FragInputs.worldToTangent", "VaryingsMeshToPS.normalWS"),
new Dependency("FragInputs.texCoord0", "VaryingsMeshToPS.texCoord0"),
new Dependency("FragInputs.texCoord1", "VaryingsMeshToPS.texCoord1"),
new Dependency("FragInputs.texCoord2", "VaryingsMeshToPS.texCoord2"),
new Dependency("FragInputs.texCoord3", "VaryingsMeshToPS.texCoord3"),
new Dependency("FragInputs.color", "VaryingsMeshToPS.color"),
new Dependency("FragInputs.isFrontFace", "VaryingsMeshToPS.cullFace"),
};
};
// this describes the input to the pixel shader graph eval
public struct SurfaceDescriptionInputs
{
[Optional] Vector3 ObjectSpaceNormal;
[Optional] Vector3 ViewSpaceNormal;
[Optional] Vector3 WorldSpaceNormal;
[Optional] Vector3 TangentSpaceNormal;
[Optional] Vector3 ObjectSpaceTangent;
[Optional] Vector3 ViewSpaceTangent;
[Optional] Vector3 WorldSpaceTangent;
[Optional] Vector3 TangentSpaceTangent;
[Optional] Vector3 ObjectSpaceBiTangent;
[Optional] Vector3 ViewSpaceBiTangent;
[Optional] Vector3 WorldSpaceBiTangent;
[Optional] Vector3 TangentSpaceBiTangent;
[Optional] Vector3 ObjectSpaceViewDirection;
[Optional] Vector3 ViewSpaceViewDirection;
[Optional] Vector3 WorldSpaceViewDirection;
[Optional] Vector3 TangentSpaceViewDirection;
[Optional] Vector3 ObjectSpacePosition;
[Optional] Vector3 ViewSpacePosition;
[Optional] Vector3 WorldSpacePosition;
[Optional] Vector3 TangentSpacePosition;
[Optional] Vector4 ScreenPosition;
[Optional] Vector4 uv0;
[Optional] Vector4 uv1;
[Optional] Vector4 uv2;
[Optional] Vector4 uv3;
[Optional] Vector4 VertexColor;
[Optional] float FaceSign;
public static Dependency[] dependencies = new Dependency[]
{
new Dependency("SurfaceDescriptionInputs.WorldSpaceNormal", "FragInputs.worldToTangent"),
new Dependency("SurfaceDescriptionInputs.ObjectSpaceNormal", "SurfaceDescriptionInputs.WorldSpaceNormal"),
new Dependency("SurfaceDescriptionInputs.ViewSpaceNormal", "SurfaceDescriptionInputs.WorldSpaceNormal"),
new Dependency("SurfaceDescriptionInputs.WorldSpaceTangent", "FragInputs.worldToTangent"),
new Dependency("SurfaceDescriptionInputs.ObjectSpaceTangent", "SurfaceDescriptionInputs.WorldSpaceTangent"),
new Dependency("SurfaceDescriptionInputs.ViewSpaceTangent", "SurfaceDescriptionInputs.WorldSpaceTangent"),
new Dependency("SurfaceDescriptionInputs.WorldSpaceBiTangent", "FragInputs.worldToTangent"),
new Dependency("SurfaceDescriptionInputs.ObjectSpaceBiTangent", "SurfaceDescriptionInputs.WorldSpaceBiTangent"),
new Dependency("SurfaceDescriptionInputs.ViewSpaceBiTangent", "SurfaceDescriptionInputs.WorldSpaceBiTangent"),
new Dependency("SurfaceDescriptionInputs.WorldSpacePosition", "FragInputs.positionRWS"),
new Dependency("SurfaceDescriptionInputs.ObjectSpacePosition", "FragInputs.positionRWS"),
new Dependency("SurfaceDescriptionInputs.ViewSpacePosition", "FragInputs.positionRWS"),
new Dependency("SurfaceDescriptionInputs.WorldSpaceViewDirection", "FragInputs.positionRWS"), // we build WorldSpaceViewDirection using FragInputs.positionRWS in GetWorldSpaceNormalizeViewDir()
new Dependency("SurfaceDescriptionInputs.ObjectSpaceViewDirection", "SurfaceDescriptionInputs.WorldSpaceViewDirection"),
new Dependency("SurfaceDescriptionInputs.ViewSpaceViewDirection", "SurfaceDescriptionInputs.WorldSpaceViewDirection"),
new Dependency("SurfaceDescriptionInputs.TangentSpaceViewDirection", "SurfaceDescriptionInputs.WorldSpaceViewDirection"),
new Dependency("SurfaceDescriptionInputs.TangentSpaceViewDirection", "SurfaceDescriptionInputs.WorldSpaceTangent"),
new Dependency("SurfaceDescriptionInputs.TangentSpaceViewDirection", "SurfaceDescriptionInputs.WorldSpaceBiTangent"),
new Dependency("SurfaceDescriptionInputs.TangentSpaceViewDirection", "SurfaceDescriptionInputs.WorldSpaceNormal"),
new Dependency("SurfaceDescriptionInputs.ScreenPosition", "SurfaceDescriptionInputs.WorldSpacePosition"),
new Dependency("SurfaceDescriptionInputs.uv0", "FragInputs.texCoord0"),
new Dependency("SurfaceDescriptionInputs.uv1", "FragInputs.texCoord1"),
new Dependency("SurfaceDescriptionInputs.uv2", "FragInputs.texCoord2"),
new Dependency("SurfaceDescriptionInputs.uv3", "FragInputs.texCoord3"),
new Dependency("SurfaceDescriptionInputs.VertexColor", "FragInputs.color"),
new Dependency("SurfaceDescriptionInputs.FaceSign", "FragInputs.isFrontFace"),
};
};
// this describes the input to the pixel shader graph eval
public struct VertexDescriptionInputs
{
[Optional] Vector3 ObjectSpaceNormal;
[Optional] Vector3 ViewSpaceNormal;
[Optional] Vector3 WorldSpaceNormal;
[Optional] Vector3 TangentSpaceNormal;
[Optional] Vector3 ObjectSpaceTangent;
[Optional] Vector3 ViewSpaceTangent;
[Optional] Vector3 WorldSpaceTangent;
[Optional] Vector3 TangentSpaceTangent;
[Optional] Vector3 ObjectSpaceBiTangent;
[Optional] Vector3 ViewSpaceBiTangent;
[Optional] Vector3 WorldSpaceBiTangent;
[Optional] Vector3 TangentSpaceBiTangent;
[Optional] Vector3 ObjectSpaceViewDirection;
[Optional] Vector3 ViewSpaceViewDirection;
[Optional] Vector3 WorldSpaceViewDirection;
[Optional] Vector3 TangentSpaceViewDirection;
[Optional] Vector3 ObjectSpacePosition;
[Optional] Vector3 ViewSpacePosition;
[Optional] Vector3 WorldSpacePosition;
[Optional] Vector3 TangentSpacePosition;
[Optional] Vector4 ScreenPosition;
[Optional] Vector4 uv0;
[Optional] Vector4 uv1;
[Optional] Vector4 uv2;
[Optional] Vector4 uv3;
[Optional] Vector4 VertexColor;
public static Dependency[] dependencies = new Dependency[]
{ // TODO: NOCHECKIN: these dependencies are not correct for vertex pass
new Dependency("VertexDescriptionInputs.ObjectSpaceNormal", "AttributesMesh.normalOS"),
new Dependency("VertexDescriptionInputs.WorldSpaceNormal", "AttributesMesh.normalOS"),
new Dependency("VertexDescriptionInputs.ViewSpaceNormal", "VertexDescriptionInputs.WorldSpaceNormal"),
new Dependency("VertexDescriptionInputs.ObjectSpaceTangent", "AttributesMesh.tangentOS"),
new Dependency("VertexDescriptionInputs.WorldSpaceTangent", "AttributesMesh.tangentOS"),
new Dependency("VertexDescriptionInputs.ViewSpaceTangent", "VertexDescriptionInputs.WorldSpaceTangent"),
new Dependency("VertexDescriptionInputs.ObjectSpaceBiTangent", "AttributesMesh.normalOS"),
new Dependency("VertexDescriptionInputs.ObjectSpaceBiTangent", "AttributesMesh.tangentOS"),
new Dependency("VertexDescriptionInputs.WorldSpaceBiTangent", "VertexDescriptionInputs.ObjectSpaceBiTangent"),
new Dependency("VertexDescriptionInputs.ViewSpaceBiTangent", "VertexDescriptionInputs.WorldSpaceBiTangent"),
new Dependency("VertexDescriptionInputs.ObjectSpacePosition", "AttributesMesh.positionOS"),
new Dependency("VertexDescriptionInputs.WorldSpacePosition", "AttributesMesh.positionOS"),
new Dependency("VertexDescriptionInputs.ViewSpacePosition", "VertexDescriptionInputs.WorldSpacePosition"),
new Dependency("VertexDescriptionInputs.WorldSpaceViewDirection", "VertexDescriptionInputs.WorldSpacePosition"),
new Dependency("VertexDescriptionInputs.ObjectSpaceViewDirection", "VertexDescriptionInputs.WorldSpaceViewDirection"),
new Dependency("VertexDescriptionInputs.ViewSpaceViewDirection", "VertexDescriptionInputs.WorldSpaceViewDirection"),
new Dependency("VertexDescriptionInputs.TangentSpaceViewDirection", "VertexDescriptionInputs.WorldSpaceViewDirection"),
new Dependency("VertexDescriptionInputs.TangentSpaceViewDirection", "VertexDescriptionInputs.WorldSpaceTangent"),
new Dependency("VertexDescriptionInputs.TangentSpaceViewDirection", "VertexDescriptionInputs.WorldSpaceBiTangent"),
new Dependency("VertexDescriptionInputs.TangentSpaceViewDirection", "VertexDescriptionInputs.WorldSpaceNormal"),
new Dependency("VertexDescriptionInputs.ScreenPosition", "VertexDescriptionInputs.WorldSpacePosition"),
new Dependency("VertexDescriptionInputs.uv0", "AttributesMesh.uv0"),
new Dependency("VertexDescriptionInputs.uv1", "AttributesMesh.uv1"),
new Dependency("VertexDescriptionInputs.uv2", "AttributesMesh.uv2"),
new Dependency("VertexDescriptionInputs.uv3", "AttributesMesh.uv3"),
new Dependency("VertexDescriptionInputs.VertexColor", "AttributesMesh.color"),
};
};
// TODO: move this out of HDRPShaderStructs
static public void AddActiveFieldsFromVertexGraphRequirements(HashSet<string> activeFields, ShaderGraphRequirements requirements)
{
if (requirements.requiresScreenPosition)
{
activeFields.Add("VertexDescriptionInputs.ScreenPosition");
}
if (requirements.requiresVertexColor)
{
activeFields.Add("VertexDescriptionInputs.VertexColor");
}
if (requirements.requiresNormal != 0)
{
if ((requirements.requiresNormal & NeededCoordinateSpace.Object) > 0)
activeFields.Add("VertexDescriptionInputs.ObjectSpaceNormal");
if ((requirements.requiresNormal & NeededCoordinateSpace.View) > 0)
activeFields.Add("VertexDescriptionInputs.ViewSpaceNormal");
if ((requirements.requiresNormal & NeededCoordinateSpace.World) > 0)
activeFields.Add("VertexDescriptionInputs.WorldSpaceNormal");
if ((requirements.requiresNormal & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("VertexDescriptionInputs.TangentSpaceNormal");
}
if (requirements.requiresTangent != 0)
{
if ((requirements.requiresTangent & NeededCoordinateSpace.Object) > 0)
activeFields.Add("VertexDescriptionInputs.ObjectSpaceTangent");
if ((requirements.requiresTangent & NeededCoordinateSpace.View) > 0)
activeFields.Add("VertexDescriptionInputs.ViewSpaceTangent");
if ((requirements.requiresTangent & NeededCoordinateSpace.World) > 0)
activeFields.Add("VertexDescriptionInputs.WorldSpaceTangent");
if ((requirements.requiresTangent & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("VertexDescriptionInputs.TangentSpaceTangent");
}
if (requirements.requiresBitangent != 0)
{
if ((requirements.requiresBitangent & NeededCoordinateSpace.Object) > 0)
activeFields.Add("VertexDescriptionInputs.ObjectSpaceBiTangent");
if ((requirements.requiresBitangent & NeededCoordinateSpace.View) > 0)
activeFields.Add("VertexDescriptionInputs.ViewSpaceBiTangent");
if ((requirements.requiresBitangent & NeededCoordinateSpace.World) > 0)
activeFields.Add("VertexDescriptionInputs.WorldSpaceBiTangent");
if ((requirements.requiresBitangent & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("VertexDescriptionInputs.TangentSpaceBiTangent");
}
if (requirements.requiresViewDir != 0)
{
if ((requirements.requiresViewDir & NeededCoordinateSpace.Object) > 0)
activeFields.Add("VertexDescriptionInputs.ObjectSpaceViewDirection");
if ((requirements.requiresViewDir & NeededCoordinateSpace.View) > 0)
activeFields.Add("VertexDescriptionInputs.ViewSpaceViewDirection");
if ((requirements.requiresViewDir & NeededCoordinateSpace.World) > 0)
activeFields.Add("VertexDescriptionInputs.WorldSpaceViewDirection");
if ((requirements.requiresViewDir & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("VertexDescriptionInputs.TangentSpaceViewDirection");
}
if (requirements.requiresPosition != 0)
{
if ((requirements.requiresPosition & NeededCoordinateSpace.Object) > 0)
activeFields.Add("VertexDescriptionInputs.ObjectSpacePosition");
if ((requirements.requiresPosition & NeededCoordinateSpace.View) > 0)
activeFields.Add("VertexDescriptionInputs.ViewSpacePosition");
if ((requirements.requiresPosition & NeededCoordinateSpace.World) > 0)
activeFields.Add("VertexDescriptionInputs.WorldSpacePosition");
if ((requirements.requiresPosition & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("VertexDescriptionInputs.TangentSpacePosition");
}
foreach (var channel in requirements.requiresMeshUVs.Distinct())
{
activeFields.Add("VertexDescriptionInputs." + channel.GetUVName());
}
}
// TODO: move this out of HDRPShaderStructs
static public void AddActiveFieldsFromPixelGraphRequirements(HashSet<string> activeFields, ShaderGraphRequirements requirements)
{
if (requirements.requiresScreenPosition)
{
activeFields.Add("SurfaceDescriptionInputs.ScreenPosition");
}
if (requirements.requiresVertexColor)
{
activeFields.Add("SurfaceDescriptionInputs.VertexColor");
}
if (requirements.requiresFaceSign)
{
activeFields.Add("SurfaceDescriptionInputs.FaceSign");
}
if (requirements.requiresNormal != 0)
{
if ((requirements.requiresNormal & NeededCoordinateSpace.Object) > 0)
activeFields.Add("SurfaceDescriptionInputs.ObjectSpaceNormal");
if ((requirements.requiresNormal & NeededCoordinateSpace.View) > 0)
activeFields.Add("SurfaceDescriptionInputs.ViewSpaceNormal");
if ((requirements.requiresNormal & NeededCoordinateSpace.World) > 0)
activeFields.Add("SurfaceDescriptionInputs.WorldSpaceNormal");
if ((requirements.requiresNormal & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("SurfaceDescriptionInputs.TangentSpaceNormal");
}
if (requirements.requiresTangent != 0)
{
if ((requirements.requiresTangent & NeededCoordinateSpace.Object) > 0)
activeFields.Add("SurfaceDescriptionInputs.ObjectSpaceTangent");
if ((requirements.requiresTangent & NeededCoordinateSpace.View) > 0)
activeFields.Add("SurfaceDescriptionInputs.ViewSpaceTangent");
if ((requirements.requiresTangent & NeededCoordinateSpace.World) > 0)
activeFields.Add("SurfaceDescriptionInputs.WorldSpaceTangent");
if ((requirements.requiresTangent & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("SurfaceDescriptionInputs.TangentSpaceTangent");
}
if (requirements.requiresBitangent != 0)
{
if ((requirements.requiresBitangent & NeededCoordinateSpace.Object) > 0)
activeFields.Add("SurfaceDescriptionInputs.ObjectSpaceBiTangent");
if ((requirements.requiresBitangent & NeededCoordinateSpace.View) > 0)
activeFields.Add("SurfaceDescriptionInputs.ViewSpaceBiTangent");
if ((requirements.requiresBitangent & NeededCoordinateSpace.World) > 0)
activeFields.Add("SurfaceDescriptionInputs.WorldSpaceBiTangent");
if ((requirements.requiresBitangent & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("SurfaceDescriptionInputs.TangentSpaceBiTangent");
}
if (requirements.requiresViewDir != 0)
{
if ((requirements.requiresViewDir & NeededCoordinateSpace.Object) > 0)
activeFields.Add("SurfaceDescriptionInputs.ObjectSpaceViewDirection");
if ((requirements.requiresViewDir & NeededCoordinateSpace.View) > 0)
activeFields.Add("SurfaceDescriptionInputs.ViewSpaceViewDirection");
if ((requirements.requiresViewDir & NeededCoordinateSpace.World) > 0)
activeFields.Add("SurfaceDescriptionInputs.WorldSpaceViewDirection");
if ((requirements.requiresViewDir & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("SurfaceDescriptionInputs.TangentSpaceViewDirection");
}
if (requirements.requiresPosition != 0)
{
if ((requirements.requiresPosition & NeededCoordinateSpace.Object) > 0)
activeFields.Add("SurfaceDescriptionInputs.ObjectSpacePosition");
if ((requirements.requiresPosition & NeededCoordinateSpace.View) > 0)
activeFields.Add("SurfaceDescriptionInputs.ViewSpacePosition");
if ((requirements.requiresPosition & NeededCoordinateSpace.World) > 0)
activeFields.Add("SurfaceDescriptionInputs.WorldSpacePosition");
if ((requirements.requiresPosition & NeededCoordinateSpace.Tangent) > 0)
activeFields.Add("SurfaceDescriptionInputs.TangentSpacePosition");
}
foreach (var channel in requirements.requiresMeshUVs.Distinct())
{
activeFields.Add("SurfaceDescriptionInputs." + channel.GetUVName());
}
}
public static void AddRequiredFields(
List<string> passRequiredFields, // fields the pass requires
HashSet<string> activeFields)
{
if (passRequiredFields != null)
{
foreach (var requiredField in passRequiredFields)
{
activeFields.Add(requiredField);
}
}
}
public static void Generate(
ShaderGenerator codeResult,
HashSet<string> activeFields)
{
// propagate requirements using dependencies
{
ShaderSpliceUtil.ApplyDependencies(
activeFields,
new List<Dependency[]>()
{
FragInputs.dependencies,
VaryingsMeshToPS.standardDependencies,
SurfaceDescriptionInputs.dependencies,
VertexDescriptionInputs.dependencies
});
}
// generate code based on requirements
ShaderSpliceUtil.BuildType(typeof(AttributesMesh), activeFields, codeResult);
ShaderSpliceUtil.BuildType(typeof(VaryingsMeshToPS), activeFields, codeResult);
ShaderSpliceUtil.BuildType(typeof(VaryingsMeshToDS), activeFields, codeResult);
ShaderSpliceUtil.BuildPackedType(typeof(VaryingsMeshToPS), activeFields, codeResult);
ShaderSpliceUtil.BuildPackedType(typeof(VaryingsMeshToDS), activeFields, codeResult);
}
};
public struct Pass
{
public string Name;
public string LightMode;
public string ShaderPassName;
public List<string> Includes;
public string TemplateName;
public List<string> ExtraDefines;
public List<int> VertexShaderSlots; // These control what slots are used by the pass vertex shader
public List<int> PixelShaderSlots; // These control what slots are used by the pass pixel shader
public string CullOverride;
public string BlendOverride;
public string BlendOpOverride;
public string ZTestOverride;
public string ZWriteOverride;
public string ColorMaskOverride;
public List<string> StencilOverride;
public List<string> RequiredFields; // feeds into the dependency analysis
public ShaderGraphRequirements requirements;
};
public static class HDSubShaderUtilities
{
public static bool GenerateShaderPass(AbstractMaterialNode masterNode, Pass pass, GenerationMode mode, SurfaceMaterialOptions materialOptions, HashSet<string> activeFields, ShaderGenerator result, List<string> sourceAssetDependencyPaths)
{
var templateLocation = Path.Combine(Path.Combine(Path.Combine(HDEditorUtils.GetHDRenderPipelinePath(), "Editor"), "ShaderGraph"), pass.TemplateName);
if (!File.Exists(templateLocation))
{
// TODO: produce error here
return false;
}
bool debugOutput = false;
if (sourceAssetDependencyPaths != null)
sourceAssetDependencyPaths.Add(templateLocation);
// grab all of the active nodes (for pixel and vertex graphs)
var vertexNodes = ListPool<INode>.Get();
NodeUtils.DepthFirstCollectNodesFromNode(vertexNodes, masterNode, NodeUtils.IncludeSelf.Include, pass.VertexShaderSlots);
var pixelNodes = ListPool<INode>.Get();
NodeUtils.DepthFirstCollectNodesFromNode(pixelNodes, masterNode, NodeUtils.IncludeSelf.Include, pass.PixelShaderSlots);
// graph requirements describe what the graph itself requires
var pixelRequirements = ShaderGraphRequirements.FromNodes(pixelNodes, ShaderStageCapability.Fragment, false); // TODO: is ShaderStageCapability.Fragment correct?
var vertexRequirements = ShaderGraphRequirements.FromNodes(vertexNodes, ShaderStageCapability.Vertex, false);
// Function Registry tracks functions to remove duplicates, it wraps a string builder that stores the combined function string
ShaderStringBuilder graphNodeFunctions = new ShaderStringBuilder();
graphNodeFunctions.IncreaseIndent();
var functionRegistry = new FunctionRegistry(graphNodeFunctions);
// TODO: this can be a shared function for all HDRP master nodes -- From here through GraphUtil.GenerateSurfaceDescription(..)
// Build the list of active slots based on what the pass requires
var pixelSlots = HDSubShaderUtilities.FindMaterialSlotsOnNode(pass.PixelShaderSlots, masterNode);
var vertexSlots = HDSubShaderUtilities.FindMaterialSlotsOnNode(pass.VertexShaderSlots, masterNode);
// properties used by either pixel and vertex shader
PropertyCollector sharedProperties = new PropertyCollector();
// build the graph outputs structure to hold the results of each active slots (and fill out activeFields to indicate they are active)
string pixelGraphInputStructName = "SurfaceDescriptionInputs";
string pixelGraphOutputStructName = "SurfaceDescription";
string pixelGraphEvalFunctionName = "SurfaceDescriptionFunction";
ShaderStringBuilder pixelGraphEvalFunction = new ShaderStringBuilder();
ShaderStringBuilder pixelGraphOutputs = new ShaderStringBuilder();
// build initial requirements
HDRPShaderStructs.AddActiveFieldsFromPixelGraphRequirements(activeFields, pixelRequirements);
// build the graph outputs structure, and populate activeFields with the fields of that structure
GraphUtil.GenerateSurfaceDescriptionStruct(pixelGraphOutputs, pixelSlots, true, pixelGraphOutputStructName, activeFields);
// Build the graph evaluation code, to evaluate the specified slots
GraphUtil.GenerateSurfaceDescriptionFunction(
pixelNodes,
masterNode,
masterNode.owner as AbstractMaterialGraph,
pixelGraphEvalFunction,
functionRegistry,
sharedProperties,
pixelRequirements, // TODO : REMOVE UNUSED
mode,
pixelGraphEvalFunctionName,
pixelGraphOutputStructName,
null,
pixelSlots,
pixelGraphInputStructName);
string vertexGraphInputStructName = "VertexDescriptionInputs";
string vertexGraphOutputStructName = "VertexDescription";
string vertexGraphEvalFunctionName = "VertexDescriptionFunction";
ShaderStringBuilder vertexGraphEvalFunction = new ShaderStringBuilder();
ShaderStringBuilder vertexGraphOutputs = new ShaderStringBuilder();
// check for vertex animation -- enables HAVE_VERTEX_MODIFICATION
bool vertexActive = false;
if (masterNode.IsSlotConnected(PBRMasterNode.PositionSlotId))
{
vertexActive = true;
activeFields.Add("features.modifyMesh");
HDRPShaderStructs.AddActiveFieldsFromVertexGraphRequirements(activeFields, vertexRequirements);
// -------------------------------------
// Generate Output structure for Vertex Description function
GraphUtil.GenerateVertexDescriptionStruct(vertexGraphOutputs, vertexSlots, vertexGraphOutputStructName, activeFields);
// -------------------------------------
// Generate Vertex Description function
GraphUtil.GenerateVertexDescriptionFunction(
masterNode.owner as AbstractMaterialGraph,
vertexGraphEvalFunction,
functionRegistry,
sharedProperties,
mode,
vertexNodes,
vertexSlots,
vertexGraphInputStructName,
vertexGraphEvalFunctionName,
vertexGraphOutputStructName);
}
var blendCode = new ShaderStringBuilder();
var cullCode = new ShaderStringBuilder();
var zTestCode = new ShaderStringBuilder();
var zWriteCode = new ShaderStringBuilder();
var stencilCode = new ShaderStringBuilder();
var colorMaskCode = new ShaderStringBuilder();
HDSubShaderUtilities.BuildRenderStatesFromPassAndMaterialOptions(pass, materialOptions, blendCode, cullCode, zTestCode, zWriteCode, stencilCode, colorMaskCode);
HDRPShaderStructs.AddRequiredFields(pass.RequiredFields, activeFields);
// apply dependencies to the active fields, and build interpolators (TODO: split this function)
var packedInterpolatorCode = new ShaderGenerator();
HDRPShaderStructs.Generate(
packedInterpolatorCode,
activeFields);
// debug output all active fields
var interpolatorDefines = new ShaderGenerator();
if (debugOutput)
{
interpolatorDefines.AddShaderChunk("// ACTIVE FIELDS:");
foreach (string f in activeFields)
{
interpolatorDefines.AddShaderChunk("// " + f);
}
}
// build graph inputs structures
ShaderGenerator pixelGraphInputs = new ShaderGenerator();
ShaderSpliceUtil.BuildType(typeof(HDRPShaderStructs.SurfaceDescriptionInputs), activeFields, pixelGraphInputs);
ShaderGenerator vertexGraphInputs = new ShaderGenerator();
ShaderSpliceUtil.BuildType(typeof(HDRPShaderStructs.VertexDescriptionInputs), activeFields, vertexGraphInputs);
ShaderGenerator defines = new ShaderGenerator();
{
defines.AddShaderChunk(string.Format("#define SHADERPASS {0}", pass.ShaderPassName), true);
if (pass.ExtraDefines != null)
{
foreach (var define in pass.ExtraDefines)
defines.AddShaderChunk(define);
}
defines.AddGenerator(interpolatorDefines);
}
var shaderPassIncludes = new ShaderGenerator();
if (pass.Includes != null)
{
foreach (var include in pass.Includes)
shaderPassIncludes.AddShaderChunk(include);
}
// build graph code
var graph = new ShaderGenerator();
{
graph.AddShaderChunk("// Shared Graph Properties (uniform inputs)");
graph.AddShaderChunk(sharedProperties.GetPropertiesDeclaration(1));
if (vertexActive)
{
graph.AddShaderChunk("// Vertex Graph Inputs");
graph.Indent();
graph.AddGenerator(vertexGraphInputs);
graph.Deindent();
graph.AddShaderChunk("// Vertex Graph Outputs");
graph.Indent();
graph.AddShaderChunk(vertexGraphOutputs.ToString());
graph.Deindent();
}
graph.AddShaderChunk("// Pixel Graph Inputs");
graph.Indent();
graph.AddGenerator(pixelGraphInputs);
graph.Deindent();
graph.AddShaderChunk("// Pixel Graph Outputs");
graph.Indent();
graph.AddShaderChunk(pixelGraphOutputs.ToString());
graph.Deindent();
graph.AddShaderChunk("// Shared Graph Node Functions");
graph.AddShaderChunk(graphNodeFunctions.ToString());
if (vertexActive)
{
graph.AddShaderChunk("// Vertex Graph Evaluation");
graph.Indent();
graph.AddShaderChunk(vertexGraphEvalFunction.ToString());
graph.Deindent();
}
graph.AddShaderChunk("// Pixel Graph Evaluation");
graph.Indent();
graph.AddShaderChunk(pixelGraphEvalFunction.ToString());
graph.Deindent();
}
// build the hash table of all named fragments TODO: could make this Dictionary<string, ShaderGenerator / string> ?
Dictionary<string, string> namedFragments = new Dictionary<string, string>();
namedFragments.Add("${Defines}", defines.GetShaderString(2, false));
namedFragments.Add("${Graph}", graph.GetShaderString(2, false));
namedFragments.Add("${LightMode}", pass.LightMode);
namedFragments.Add("${PassName}", pass.Name);
namedFragments.Add("${Includes}", shaderPassIncludes.GetShaderString(2, false));
namedFragments.Add("${InterpolatorPacking}", packedInterpolatorCode.GetShaderString(2, false));
namedFragments.Add("${Blending}", blendCode.ToString());
namedFragments.Add("${Culling}", cullCode.ToString());
namedFragments.Add("${ZTest}", zTestCode.ToString());
namedFragments.Add("${ZWrite}", zWriteCode.ToString());
namedFragments.Add("${Stencil}", stencilCode.ToString());
namedFragments.Add("${ColorMask}", colorMaskCode.ToString());
namedFragments.Add("${LOD}", materialOptions.lod.ToString());
// process the template to generate the shader code for this pass TODO: could make this a shared function
string[] templateLines = File.ReadAllLines(templateLocation);
System.Text.StringBuilder builder = new System.Text.StringBuilder();
foreach (string line in templateLines)
{
ShaderSpliceUtil.PreprocessShaderCode(line, activeFields, namedFragments, builder, debugOutput);
}
result.AddShaderChunk(builder.ToString(), false);
return true;
}
public static List<MaterialSlot> FindMaterialSlotsOnNode(IEnumerable<int> slots, AbstractMaterialNode node)
{
var activeSlots = new List<MaterialSlot>();
if (slots != null)
{
foreach (var id in slots)
{
MaterialSlot slot = node.FindSlot<MaterialSlot>(id);
if (slot != null)
{
activeSlots.Add(slot);
}
}
}
return activeSlots;
}
public static void BuildRenderStatesFromPassAndMaterialOptions(
Pass pass,
SurfaceMaterialOptions materialOptions,
ShaderStringBuilder blendCode,
ShaderStringBuilder cullCode,
ShaderStringBuilder zTestCode,
ShaderStringBuilder zWriteCode,
ShaderStringBuilder stencilCode,
ShaderStringBuilder colorMaskCode)
{
if (pass.BlendOverride != null)
{
blendCode.AppendLine(pass.BlendOverride);
}
else
{
materialOptions.GetBlend(blendCode);
}
if (pass.BlendOpOverride != null)
{
blendCode.AppendLine(pass.BlendOpOverride);
}
if (pass.CullOverride != null)
{
cullCode.AppendLine(pass.CullOverride);
}
else
{
materialOptions.GetCull(cullCode);
}
if (pass.ZTestOverride != null)
{
zTestCode.AppendLine(pass.ZTestOverride);
}
else
{
materialOptions.GetDepthTest(zTestCode);
}
if (pass.ZWriteOverride != null)
{
zWriteCode.AppendLine(pass.ZWriteOverride);
}
else
{
materialOptions.GetDepthWrite(zWriteCode);
}
if (pass.ColorMaskOverride != null)
{
colorMaskCode.AppendLine(pass.ColorMaskOverride);
}
else
{
// material option default is to not declare anything for color mask
}
if (pass.StencilOverride != null)
{
foreach (var str in pass.StencilOverride)
{
stencilCode.AppendLine(str);
}
}
else
{
stencilCode.AppendLine("// Default Stencil");
}
}
public static SurfaceMaterialOptions BuildMaterialOptions(SurfaceType surfaceType, AlphaMode alphaMode, bool twoSided)
{
SurfaceMaterialOptions materialOptions = new SurfaceMaterialOptions();
if (surfaceType == SurfaceType.Opaque)
{
materialOptions.srcBlend = SurfaceMaterialOptions.BlendMode.One;
materialOptions.dstBlend = SurfaceMaterialOptions.BlendMode.Zero;
materialOptions.zTest = SurfaceMaterialOptions.ZTest.LEqual;
materialOptions.zWrite = SurfaceMaterialOptions.ZWrite.On;
materialOptions.renderQueue = SurfaceMaterialOptions.RenderQueue.Geometry;
materialOptions.renderType = SurfaceMaterialOptions.RenderType.Opaque;
}
else
{
switch (alphaMode)
{
case AlphaMode.Alpha:
materialOptions.srcBlend = SurfaceMaterialOptions.BlendMode.SrcAlpha;
materialOptions.dstBlend = SurfaceMaterialOptions.BlendMode.OneMinusSrcAlpha;
materialOptions.zTest = SurfaceMaterialOptions.ZTest.LEqual;
materialOptions.zWrite = SurfaceMaterialOptions.ZWrite.Off;
materialOptions.renderQueue = SurfaceMaterialOptions.RenderQueue.Transparent;
materialOptions.renderType = SurfaceMaterialOptions.RenderType.Transparent;
break;
case AlphaMode.Additive:
materialOptions.srcBlend = SurfaceMaterialOptions.BlendMode.One;
materialOptions.dstBlend = SurfaceMaterialOptions.BlendMode.One;
materialOptions.zTest = SurfaceMaterialOptions.ZTest.LEqual;
materialOptions.zWrite = SurfaceMaterialOptions.ZWrite.Off;
materialOptions.renderQueue = SurfaceMaterialOptions.RenderQueue.Transparent;
materialOptions.renderType = SurfaceMaterialOptions.RenderType.Transparent;
break;
// TODO: other blend modes
}
}
materialOptions.cullMode = twoSided ? SurfaceMaterialOptions.CullMode.Off : SurfaceMaterialOptions.CullMode.Back;
return materialOptions;
}
}
}