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124 行
4.5 KiB

using UnityEditor.ShaderGraph;
using UnityEngine;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using UnityEditor;
using UnityEditor.Experimental.AssetImporters;
using UnityEditor.ShaderGraph.Drawing;
namespace UnityEditor.ShaderGraph
{
[ScriptedImporter(16, ShaderGraphExtension)]
public class ShaderGraphImporter : ScriptedImporter
{
public const string ShaderGraphExtension = "shadergraph";
const string k_ErrorShader = @"
Shader ""Hidden/GraphErrorShader2""
{
SubShader
{
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 2.0
#pragma multi_compile _ UNITY_SINGLE_PASS_STEREO STEREO_INSTANCING_ON STEREO_MULTIVIEW_ON
#include ""UnityCG.cginc""
struct appdata_t {
float4 vertex : POSITION;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
struct v2f {
float4 vertex : SV_POSITION;
UNITY_VERTEX_OUTPUT_STEREO
};
v2f vert (appdata_t v)
{
v2f o;
UNITY_SETUP_INSTANCE_ID(v);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
o.vertex = UnityObjectToClipPos(v.vertex);
return o;
}
fixed4 frag (v2f i) : SV_Target
{
return fixed4(1,0,1,1);
}
ENDCG
}
}
Fallback Off
}";
public override void OnImportAsset(AssetImportContext ctx)
{
var oldShader = AssetDatabase.LoadAssetAtPath<Shader>(ctx.assetPath);
if (oldShader != null)
ShaderUtil.ClearShaderErrors(oldShader);
List<PropertyCollector.TextureInfo> configuredTextures;
string path = ctx.assetPath;
var sourceAssetDependencyPaths = new List<string>();
var text = GetShaderText(path, out configuredTextures, sourceAssetDependencyPaths);
var shader = ShaderUtil.CreateShaderAsset(text);
EditorMaterialUtility.SetShaderDefaults(
shader,
configuredTextures.Where(x => x.modifiable).Select(x => x.name).ToArray(),
configuredTextures.Where(x => x.modifiable).Select(x => EditorUtility.InstanceIDToObject(x.textureId) as Texture).ToArray());
EditorMaterialUtility.SetShaderNonModifiableDefaults(
shader,
configuredTextures.Where(x => !x.modifiable).Select(x => x.name).ToArray(),
configuredTextures.Where(x => !x.modifiable).Select(x => EditorUtility.InstanceIDToObject(x.textureId) as Texture).ToArray());
ctx.AddObjectToAsset("MainAsset", shader);
ctx.SetMainObject(shader);
foreach (var sourceAssetDependencyPath in sourceAssetDependencyPaths.Distinct())
ctx.DependsOnSourceAsset(sourceAssetDependencyPath);
}
internal static string GetShaderText(string path, out List<PropertyCollector.TextureInfo> configuredTextures, List<string> sourceAssetDependencyPaths)
{
string shaderString = null;
var shaderName = Path.GetFileNameWithoutExtension(path);
try
{
var textGraph = File.ReadAllText(path, Encoding.UTF8);
var graph = JsonUtility.FromJson<MaterialGraph>(textGraph);
graph.LoadedFromDisk();
if (!string.IsNullOrEmpty(graph.path))
shaderName = graph.path + "/" + shaderName;
shaderString = graph.GetShader(shaderName, GenerationMode.ForReals, out configuredTextures, sourceAssetDependencyPaths);
if (sourceAssetDependencyPaths != null)
{
foreach (var node in graph.GetNodes<AbstractMaterialNode>())
node.GetSourceAssetDependencies(sourceAssetDependencyPaths);
}
}
catch (Exception)
{
configuredTextures = new List<PropertyCollector.TextureInfo>();
// ignored
}
return shaderString ?? k_ErrorShader.Replace("Hidden/GraphErrorShader2", shaderName);
}
internal static string GetShaderText(string path, out List<PropertyCollector.TextureInfo> configuredTextures)
{
return GetShaderText(path, out configuredTextures, null);
}
}
}