From 88b335aa0fac6a3745a97ed2ece084f3e869adb4 Mon Sep 17 00:00:00 2001
From: Jesse Yurkovich <jesse.y@gmail.com>
Date: Fri, 8 Mar 2024 23:23:58 +0100
Subject: [PATCH] Fix #98572: handle the 'mirror' texture wrap mode for USD
 materials

Support for the texture extension mode of "mirror" was simply missed
from `925fb66693d`.

With this patch, #98572 should be completely fixed.

Pull Request: https://projects.blender.org/blender/blender/pulls/118947
---
 source/blender/io/usd/intern/usd_reader_material.cc | 5 +++++
 source/blender/io/usd/intern/usd_writer_material.cc | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/source/blender/io/usd/intern/usd_reader_material.cc b/source/blender/io/usd/intern/usd_reader_material.cc
index 1f0217583b0..6fdf561de3b 100644
--- a/source/blender/io/usd/intern/usd_reader_material.cc
+++ b/source/blender/io/usd/intern/usd_reader_material.cc
@@ -74,6 +74,7 @@ static const pxr::TfToken RAW("RAW", pxr::TfToken::Immortal);
 static const pxr::TfToken black("black", pxr::TfToken::Immortal);
 static const pxr::TfToken clamp("clamp", pxr::TfToken::Immortal);
 static const pxr::TfToken repeat("repeat", pxr::TfToken::Immortal);
+static const pxr::TfToken mirror("mirror", pxr::TfToken::Immortal);
 static const pxr::TfToken wrapS("wrapS", pxr::TfToken::Immortal);
 static const pxr::TfToken wrapT("wrapT", pxr::TfToken::Immortal);
 
@@ -332,6 +333,10 @@ static int get_image_extension(const pxr::UsdShadeShader &usd_shader, const int
     return SHD_IMAGE_EXTENSION_CLIP;
   }
 
+  if (wrap_val == usdtokens::mirror) {
+    return SHD_IMAGE_EXTENSION_MIRROR;
+  }
+
   return default_value;
 }
 
diff --git a/source/blender/io/usd/intern/usd_writer_material.cc b/source/blender/io/usd/intern/usd_writer_material.cc
index 1c2127e65fc..5e566a4481b 100644
--- a/source/blender/io/usd/intern/usd_writer_material.cc
+++ b/source/blender/io/usd/intern/usd_writer_material.cc
@@ -80,6 +80,7 @@ static const pxr::TfToken Shader("Shader", pxr::TfToken::Immortal);
 static const pxr::TfToken black("black", pxr::TfToken::Immortal);
 static const pxr::TfToken clamp("clamp", pxr::TfToken::Immortal);
 static const pxr::TfToken repeat("repeat", pxr::TfToken::Immortal);
+static const pxr::TfToken mirror("mirror", pxr::TfToken::Immortal);
 static const pxr::TfToken wrapS("wrapS", pxr::TfToken::Immortal);
 static const pxr::TfToken wrapT("wrapT", pxr::TfToken::Immortal);
 static const pxr::TfToken in("in", pxr::TfToken::Immortal);
@@ -697,6 +698,9 @@ static pxr::TfToken get_node_tex_image_wrap(bNode *node)
     case SHD_IMAGE_EXTENSION_CLIP:
       wrap = usdtokens::black;
       break;
+    case SHD_IMAGE_EXTENSION_MIRROR:
+      wrap = usdtokens::mirror;
+      break;
   }
 
   return wrap;