using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEditor;
namespace MCPForUnity.Editor.Helpers
{
internal static class RenderPipelineUtility
{
internal enum PipelineKind
{
BuiltIn,
Universal,
HighDefinition,
Custom
}
internal enum VFXComponentType
{
ParticleSystem,
LineRenderer,
TrailRenderer
}
private static Dictionary<string, Material> s_DefaultVFXMaterials = new Dictionary<string, Material>();
private static Dictionary<string, Material> s_DefaultSceneMaterials = new Dictionary<string, Material>();
private static readonly string[] BuiltInLitShaders = { "Standard", "Legacy Shaders/Diffuse" };
private static readonly string[] BuiltInUnlitShaders = { "Unlit/Color", "Unlit/Texture" };
private static readonly string[] BuiltInParticleShaders = { "Particles/Standard Unlit", "Particles/Alpha Blended", "Particles/Additive" };
private static readonly string[] UrpLitShaders = { "Universal Render Pipeline/Lit", "Universal Render Pipeline/Simple Lit" };
private static readonly string[] UrpUnlitShaders = { "Universal Render Pipeline/Unlit" };
private static readonly string[] UrpParticleShaders = {
"Universal Render Pipeline/Particles/Unlit",
"Universal Render Pipeline/Particles/Simple Lit",
"Universal Render Pipeline/Particles/Lit",
};
private static readonly string[] HdrpLitShaders = { "HDRP/Lit", "High Definition Render Pipeline/Lit" };
private static readonly string[] HdrpUnlitShaders = { "HDRP/Unlit", "High Definition Render Pipeline/Unlit" };
internal static PipelineKind GetActivePipeline()
{
var asset = GraphicsSettings.currentRenderPipeline;
if (asset == null)
{
return PipelineKind.BuiltIn;
}
var typeName = asset.GetType().FullName ?? string.Empty;
if (typeName.IndexOf("HighDefinition", StringComparison.OrdinalIgnoreCase) >= 0 ||
typeName.IndexOf("HDRP", StringComparison.OrdinalIgnoreCase) >= 0)
{
return PipelineKind.HighDefinition;
}
if (typeName.IndexOf("Universal", StringComparison.OrdinalIgnoreCase) >= 0 ||
typeName.IndexOf("URP", StringComparison.OrdinalIgnoreCase) >= 0)
{
return PipelineKind.Universal;
}
return PipelineKind.Custom;
}
internal static Shader ResolveShader(string requestedNameOrAlias)
{
var pipeline = GetActivePipeline();
if (!string.IsNullOrWhiteSpace(requestedNameOrAlias))
{
var alias = requestedNameOrAlias.Trim();
var aliasMatch = ResolveAlias(alias, pipeline);
if (aliasMatch != null)
{
WarnIfPipelineMismatch(aliasMatch.name, pipeline);
return aliasMatch;
}
var direct = Shader.Find(alias);
if (direct != null)
{
WarnIfPipelineMismatch(direct.name, pipeline);
return direct;
}
McpLog.Warn($"Shader '{alias}' not found. Falling back to {pipeline} defaults.");
}
var fallback = ResolveDefaultLitShader(pipeline)
?? ResolveDefaultLitShader(PipelineKind.BuiltIn)
?? Shader.Find("Unlit/Color");
if (fallback != null)
{
WarnIfPipelineMismatch(fallback.name, pipeline);
}
return fallback;
}
internal static Shader ResolveDefaultLitShader(PipelineKind pipeline)
{
return pipeline switch
{
PipelineKind.HighDefinition => TryFindShader(HdrpLitShaders) ?? TryFindShader(UrpLitShaders),
PipelineKind.Universal => TryFindShader(UrpLitShaders) ?? TryFindShader(HdrpLitShaders),
PipelineKind.Custom => TryFindShader(BuiltInLitShaders) ?? TryFindShader(UrpLitShaders) ?? TryFindShader(HdrpLitShaders),
_ => TryFindShader(BuiltInLitShaders) ?? Shader.Find("Unlit/Color")
};
}
internal static Shader ResolveDefaultUnlitShader(PipelineKind pipeline)
{
return pipeline switch
{
PipelineKind.HighDefinition => TryFindShader(HdrpUnlitShaders) ?? TryFindShader(UrpUnlitShaders) ?? TryFindShader(BuiltInUnlitShaders),
PipelineKind.Universal => TryFindShader(UrpUnlitShaders) ?? TryFindShader(HdrpUnlitShaders) ?? TryFindShader(BuiltInUnlitShaders),
PipelineKind.Custom => TryFindShader(BuiltInUnlitShaders) ?? TryFindShader(UrpUnlitShaders) ?? TryFindShader(HdrpUnlitShaders),
_ => TryFindShader(BuiltInUnlitShaders)
};
}
private static Shader ResolveAlias(string alias, PipelineKind pipeline)
{
if (string.Equals(alias, "lit", StringComparison.OrdinalIgnoreCase) ||
string.Equals(alias, "default", StringComparison.OrdinalIgnoreCase) ||
string.Equals(alias, "default_lit", StringComparison.OrdinalIgnoreCase) ||
string.Equals(alias, "standard", StringComparison.OrdinalIgnoreCase))
{
return ResolveDefaultLitShader(pipeline);
}
if (string.Equals(alias, "unlit", StringComparison.OrdinalIgnoreCase))
{
return ResolveDefaultUnlitShader(pipeline);
}
if (string.Equals(alias, "urp_lit", StringComparison.OrdinalIgnoreCase))
{
return TryFindShader(UrpLitShaders);
}
if (string.Equals(alias, "hdrp_lit", StringComparison.OrdinalIgnoreCase))
{
return TryFindShader(HdrpLitShaders);
}
if (string.Equals(alias, "built_in_lit", StringComparison.OrdinalIgnoreCase))
{
return TryFindShader(BuiltInLitShaders);
}
return null;
}
private static Shader TryFindShader(params string[] shaderNames)
{
foreach (var shaderName in shaderNames)
{
var shader = Shader.Find(shaderName);
if (shader != null)
{
return shader;
}
}
return null;
}
private static void WarnIfPipelineMismatch(string shaderName, PipelineKind activePipeline)
{
if (string.IsNullOrEmpty(shaderName))
{
return;
}
var lowerName = shaderName.ToLowerInvariant();
bool shaderLooksUrp = lowerName.Contains("universal render pipeline") || lowerName.Contains("urp/");
bool shaderLooksHdrp = lowerName.Contains("high definition render pipeline") || lowerName.Contains("hdrp/");
bool shaderLooksSrp = shaderLooksUrp || shaderLooksHdrp;
bool shaderLooksBuiltin = LooksLikeBuiltInShader(lowerName, shaderLooksSrp);
switch (activePipeline)
{
case PipelineKind.HighDefinition:
if (shaderLooksUrp)
{
McpLog.Warn($"[RenderPipelineUtility] Active pipeline is HDRP but shader '{shaderName}' looks URP-based. Asset may appear incorrect.");
}
else if (shaderLooksBuiltin && !shaderLooksHdrp)
{
McpLog.Warn($"[RenderPipelineUtility] Active pipeline is HDRP but shader '{shaderName}' looks Built-in. Consider using an HDRP shader for correct results.");
}
break;
case PipelineKind.Universal:
if (shaderLooksHdrp)
{
McpLog.Warn($"[RenderPipelineUtility] Active pipeline is URP but shader '{shaderName}' looks HDRP-based. Asset may appear incorrect.");
}
else if (shaderLooksBuiltin && !shaderLooksUrp)
{
McpLog.Warn($"[RenderPipelineUtility] Active pipeline is URP but shader '{shaderName}' looks Built-in. Consider using a URP shader for correct results.");
}
break;
case PipelineKind.BuiltIn:
if (shaderLooksSrp)
{
McpLog.Warn($"[RenderPipelineUtility] Active pipeline is Built-in but shader '{shaderName}' targets URP/HDRP. Asset may not render as expected.");
}
break;
}
}
internal static bool IsMaterialInvalidForActivePipeline(Material material, out string reason)
{
reason = null;
if (material == null)
{
reason = "missing_material";
return true;
}
Shader shader = material.shader;
if (shader == null)
{
reason = "missing_shader";
return true;
}
if (IsErrorShader(shader))
{
reason = "error_shader";
return true;
}
var pipeline = GetActivePipeline();
if (IsPipelineMismatch(shader.name, pipeline))
{
reason = "pipeline_mismatch";
return true;
}
return false;
}
private static bool IsErrorShader(Shader shader)
{
if (shader == null)
{
return true;
}
if (shader == Shader.Find("Hidden/InternalErrorShader"))
{
return true;
}
string shaderName = shader.name ?? string.Empty;
return shaderName.IndexOf("InternalErrorShader", StringComparison.OrdinalIgnoreCase) >= 0;
}
private static bool IsPipelineMismatch(string shaderName, PipelineKind activePipeline)
{
if (string.IsNullOrEmpty(shaderName))
{
return true;
}
string lowerName = shaderName.ToLowerInvariant();
bool shaderLooksUrp = lowerName.Contains("universal render pipeline") || lowerName.Contains("urp/");
bool shaderLooksHdrp = lowerName.Contains("high definition render pipeline") || lowerName.Contains("hdrp/");
bool shaderLooksSrp = shaderLooksUrp || shaderLooksHdrp;
bool shaderLooksBuiltin = LooksLikeBuiltInShader(lowerName, shaderLooksSrp);
return activePipeline switch
{
PipelineKind.HighDefinition => shaderLooksUrp || (shaderLooksBuiltin && !shaderLooksHdrp),
PipelineKind.Universal => shaderLooksHdrp || (shaderLooksBuiltin && !shaderLooksUrp),
PipelineKind.BuiltIn => shaderLooksSrp,
_ => false,
};
}
internal static Material GetOrCreateDefaultVFXMaterial(VFXComponentType componentType)
{
var pipeline = GetActivePipeline();
string cacheKey = $"{pipeline}_{componentType}";
if (s_DefaultVFXMaterials.TryGetValue(cacheKey, out Material cachedMaterial) && cachedMaterial != null)
{
return cachedMaterial;
}
Material material = null;
if (pipeline == PipelineKind.BuiltIn)
{
string builtinPath = componentType == VFXComponentType.ParticleSystem
? "Default-Particle.mat"
: "Default-Line.mat";
material = AssetDatabase.GetBuiltinExtraResource<Material>(builtinPath);
}
if (material == null)
{
Shader shader = ResolveDefaultVFXShader(pipeline, componentType);
if (shader == null)
{
shader = Shader.Find("Unlit/Color");
}
if (shader != null)
{
material = new Material(shader);
material.name = $"Auto_Default_{componentType}_{pipeline}";
// Set default color (white is standard for VFX)
if (material.HasProperty("_Color"))
{
material.SetColor("_Color", Color.white);
}
if (material.HasProperty("_BaseColor"))
{
material.SetColor("_BaseColor", Color.white);
}
if (componentType == VFXComponentType.ParticleSystem)
{
material.renderQueue = 3000;
if (material.HasProperty("_Mode"))
{
material.SetFloat("_Mode", 2);
}
if (material.HasProperty("_SrcBlend"))
{
material.SetFloat("_SrcBlend", (float)UnityEngine.Rendering.BlendMode.SrcAlpha);
}
if (material.HasProperty("_DstBlend"))
{
material.SetFloat("_DstBlend", (float)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
}
if (material.HasProperty("_ZWrite"))
{
material.SetFloat("_ZWrite", 0);
}
}
McpLog.Info($"[RenderPipelineUtility] Created default VFX material for {componentType} using {shader.name}");
}
}
if (material != null)
{
s_DefaultVFXMaterials[cacheKey] = material;
}
return material;
}
private static Shader ResolveDefaultVFXShader(PipelineKind pipeline, VFXComponentType componentType)
{
if (componentType == VFXComponentType.ParticleSystem)
{
return pipeline switch
{
PipelineKind.Universal => TryFindShader(UrpParticleShaders) ?? ResolveDefaultUnlitShader(pipeline),
PipelineKind.HighDefinition => TryFindShader(HdrpUnlitShaders) ?? ResolveDefaultUnlitShader(pipeline),
PipelineKind.BuiltIn => TryFindShader(BuiltInParticleShaders) ?? ResolveDefaultUnlitShader(pipeline),
PipelineKind.Custom => TryFindShader(UrpParticleShaders)
?? TryFindShader(BuiltInParticleShaders)
?? TryFindShader(HdrpUnlitShaders)
?? ResolveDefaultUnlitShader(pipeline),
_ => ResolveDefaultUnlitShader(pipeline),
};
}
return ResolveDefaultUnlitShader(pipeline);
}
private static bool LooksLikeBuiltInShader(string lowerName, bool shaderLooksSrp)
{
if (string.IsNullOrEmpty(lowerName))
{
return false;
}
if (lowerName == "standard" ||
lowerName.StartsWith("legacy shaders/", StringComparison.Ordinal) ||
lowerName.StartsWith("mobile/", StringComparison.Ordinal))
{
return true;
}
// Built-in non-SRP shader families commonly seen on particles/old content.
if (!shaderLooksSrp &&
(lowerName.StartsWith("particles/", StringComparison.Ordinal) ||
lowerName.StartsWith("unlit/", StringComparison.Ordinal)))
{
return true;
}
return false;
}
internal static Material GetOrCreateDefaultSceneMaterial()
{
var pipeline = GetActivePipeline();
string cacheKey = $"{pipeline}_scene";
if (s_DefaultSceneMaterials.TryGetValue(cacheKey, out Material cached) && cached != null)
{
return cached;
}
Material material = null;
Shader shader = ResolveDefaultLitShader(pipeline) ?? ResolveDefaultUnlitShader(pipeline);
if (shader == null)
{
shader = Shader.Find("Unlit/Color");
}
if (shader != null)
{
material = new Material(shader);
material.name = $"Auto_Default_Scene_{pipeline}";
if (material.HasProperty("_Color"))
{
material.SetColor("_Color", Color.white);
}
if (material.HasProperty("_BaseColor"))
{
material.SetColor("_BaseColor", Color.white);
}
McpLog.Info($"[RenderPipelineUtility] Created default scene material using {shader.name}");
}
if (material != null)
{
s_DefaultSceneMaterials[cacheKey] = material;
}
return material;
}
}
}
