From 65034934385a3f40907e9d5377d3135092fbcb69 Mon Sep 17 00:00:00 2001
From: Masataka SUMI <santarh@gmail.com>
Date: Fri, 4 Nov 2022 23:39:57 +0900
Subject: [PATCH] Migrate materials when importing a VRM 0.x model.

---
 .../Runtime/UniGLTF/IO/MigrationFlags.cs      |  2 +-
 .../VRM/Runtime/Format/VRMVersionPartial.cs   |  7 ++++-
 Assets/VRM/Runtime/IO/VRMData.cs              | 28 +++++++++++++++++++
 3 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MigrationFlags.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MigrationFlags.cs
index 0da201b7d..fffb08419 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MigrationFlags.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MigrationFlags.cs
@@ -8,7 +8,7 @@
         public bool IsRoughnessTextureValueSquared { get; set; } = false;
 
         /// <summary>
-        /// Built-in RP Standard shader's emission color is exported in gamma color space until UniGLTF v0.106.0.
+        /// Before UniGLTF v0.107.0, Built-in RP Standard shader's emission color is exported in gamma color space.
         /// </summary>
         public bool IsEmissiveFactorGamma { get; set; } = false;
     }
diff --git a/Assets/VRM/Runtime/Format/VRMVersionPartial.cs b/Assets/VRM/Runtime/Format/VRMVersionPartial.cs
index 2fe04e6da..4a739ac0b 100644
--- a/Assets/VRM/Runtime/Format/VRMVersionPartial.cs
+++ b/Assets/VRM/Runtime/Format/VRMVersionPartial.cs
@@ -40,6 +40,11 @@ namespace VRM
                 return false;
             }
 
+            return IsNewer(newerVersion, olderVersion);
+        }
+
+        public static bool IsNewer(Version newerVersion, Version olderVersion)
+        {
             if (newerVersion.Major > olderVersion.Major)
             {
                 return true;
@@ -55,7 +60,7 @@ namespace VRM
                 return true;
             }
 
-            if (String.Compare(newerVersion.Pre, olderVersion.Pre) > 0)
+            if (string.CompareOrdinal(newerVersion.Pre, olderVersion.Pre) > 0)
             {
                 return true;
             }
diff --git a/Assets/VRM/Runtime/IO/VRMData.cs b/Assets/VRM/Runtime/IO/VRMData.cs
index 84e85eb82..debd8c826 100644
--- a/Assets/VRM/Runtime/IO/VRMData.cs
+++ b/Assets/VRM/Runtime/IO/VRMData.cs
@@ -16,6 +16,34 @@ namespace VRM
                 throw new NotVrm0Exception();
             }
             VrmExtension = vrm;
+
+            UpdateMigrationFlags(Data.MigrationFlags, VrmExtension.exporterVersion);
+        }
+
+        private static void UpdateMigrationFlags(MigrationFlags migrationFlags, string exportedVrmVersionString)
+        {
+            if (!VRMVersion.ParseVersion(exportedVrmVersionString, out var exportedVrmVersion)) return;
+
+            migrationFlags.IsRoughnessTextureValueSquared = VRMVersion.IsNewer(
+                new VRMVersion.Version
+                {
+                    Major = 0,
+                    Minor = 69,
+                    Patch = 0,
+                    Pre = "",
+                },
+                exportedVrmVersion
+            );
+            migrationFlags.IsEmissiveFactorGamma = VRMVersion.IsNewer(
+                new VRMVersion.Version
+                {
+                    Major = 0,
+                    Minor = 107,
+                    Patch = 0,
+                    Pre = "",
+                },
+                exportedVrmVersion
+            );
         }
     }
 }