From 2be2615e616c59d5a5acfe12eb9065cda18fb1df Mon Sep 17 00:00:00 2001
From: doop <56421834+dooplecks@users.noreply.github.com>
Date: Mon, 18 May 2026 00:46:45 +0000
Subject: [PATCH] Endian-swap indirect texture matrix in J2D data

Fixes copy/delete effects on the file screen.
---
 include/dusk/endian.h                         | 22 +++++++++++++++++++
 .../include/JSystem/J2DGraph/J2DTevs.h        |  2 +-
 libs/JSystem/src/J2DGraph/J2DTevs.cpp         |  6 +++++
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/include/dusk/endian.h b/include/dusk/endian.h
index 0fec59411f..e73eb8da19 100644
--- a/include/dusk/endian.h
+++ b/include/dusk/endian.h
@@ -227,6 +227,28 @@ struct BE<Mtx> {
     }
 };
 
+typedef f32 Mtx23[2][3];
+template <>
+struct BE<Mtx23> {
+    BE<f32> contents[2][3];
+
+    auto& operator[](int x) {
+        return contents[x];
+    }
+
+    auto& operator[](int x) const {
+        return contents[x];
+    }
+
+    void to_host(Mtx23& mtx) const {
+        for (int i = 0; i < 3; i++) {
+            for (int j = 0; j < 4; j++) {
+                mtx[i][j] = contents[i][j];
+            }
+        }
+    }
+};
+
 template<typename T>
 void be_swap(T& val) {
     val = BE<T>::swap(val);
diff --git a/libs/JSystem/include/JSystem/J2DGraph/J2DTevs.h b/libs/JSystem/include/JSystem/J2DGraph/J2DTevs.h
index 2d5f3ca2d6..ea81bc869f 100644
--- a/libs/JSystem/include/JSystem/J2DGraph/J2DTevs.h
+++ b/libs/JSystem/include/JSystem/J2DGraph/J2DTevs.h
@@ -116,7 +116,7 @@ private:
  * 
  */
 struct J2DIndTexMtxInfo {
-    /* 0x00 */ Mtx23 mMtx;
+    /* 0x00 */ BE(Mtx23) mMtx;
     /* 0x18 */ s8 mScaleExp;
 
     J2DIndTexMtxInfo& operator=(const J2DIndTexMtxInfo& other) {
diff --git a/libs/JSystem/src/J2DGraph/J2DTevs.cpp b/libs/JSystem/src/J2DGraph/J2DTevs.cpp
index 8daf82872c..33a65dd273 100644
--- a/libs/JSystem/src/J2DGraph/J2DTevs.cpp
+++ b/libs/JSystem/src/J2DGraph/J2DTevs.cpp
@@ -68,8 +68,14 @@ void J2DIndTevStage::load(u8 tevStage) {
 }
 
 void J2DIndTexMtx::load(u8 indTexMtx) {
+#ifdef TARGET_PC
+    Mtx23 mtx;
+    mIndTexMtxInfo.mMtx.to_host(mtx);
+    GXSetIndTexMtx((GXIndTexMtxID)(GX_ITM_0 + indTexMtx), mtx, mIndTexMtxInfo.mScaleExp);
+#else
     GXSetIndTexMtx((GXIndTexMtxID)(GX_ITM_0 + indTexMtx), mIndTexMtxInfo.mMtx,
                    mIndTexMtxInfo.mScaleExp);
+#endif
 }
 
 void J2DIndTexCoordScale::load(u8 indTexStage) {