From 4c5776347387163ac203845b1057c12dd902af9a Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Tue, 21 Oct 2025 18:59:06 -0500
Subject: [PATCH] warn when loading file with partial pitch linearit

---
 src/engine/fileOps/fur.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/engine/fileOps/fur.cpp b/src/engine/fileOps/fur.cpp
index efb1d2632..4d7baaaf1 100644
--- a/src/engine/fileOps/fur.cpp
+++ b/src/engine/fileOps/fur.cpp
@@ -2174,6 +2174,11 @@ bool DivEngine::loadFur(unsigned char* file, size_t len, int variantID) {
       }
     }
 
+    // warn on partial pitch linearity
+    if (ds.linearPitch==1) {
+      addWarning("this song uses partial pitch linearity, which will be removed soon. please migrate to full or none by going to Compatibility Flags and then adjusting your song afterwards.");
+    }
+
     if (active) quitDispatch();
     BUSY_BEGIN_SOFT;
     saveLock.lock();