From 3d8991cdb826432be6fa98da1ec91c8d086e6f30 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 8 Feb 2022 16:43:40 -0500
Subject: [PATCH] save compat flags in the file

---
 papers/format.md      |  8 ++++++-
 src/engine/engine.cpp | 49 +++++++++++++++++++++++++++++++++++++++++--
 src/engine/engine.h   |  4 ++--
 3 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/papers/format.md b/papers/format.md
index 6f00d147..734f5b2c 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -25,6 +25,7 @@ furthermore, an `or reserved` indicates this field is always present, but is res
 
 the format versions are:
 
+- 45: Furnace 0.5.5pre3
 - 44: Furnace 0.5.5pre2
 - 43: Furnace 0.5.5pre1
 - 42: Furnace 0.5.4
@@ -155,7 +156,12 @@ size | description
   1  | loop modality (>=36) or reserved
   1  | proper noise layout (>=42) or reserved
   1  | wave duty is volume (>=42) or reserved
- 15  | reserved
+  1  | reset macro on porta (>=45) or reserved
+  1  | legacy volume slides (>=45) or reserved
+  1  | compatible arpeggio (>=45) or reserved
+  1  | note off resets slides (>=45) or reserved
+  1  | target resets slides (>=45) or reserved
+ 10  | reserved
  4?? | pointers to instruments
  4?? | pointers to wavetables
  4?? | pointers to samples
diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 252bb42a..4365d1d8 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -1544,6 +1544,13 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
     ds.limitSlides=true;
     ds.linearPitch=true;
     ds.loopModality=0;
+    ds.properNoiseLayout=false;
+    ds.waveDutyIsVol=false;
+    ds.resetMacroOnPorta=true;
+    ds.legacyVolumeSlides=true;
+    ds.compatibleArpeggio=true;
+    ds.noteOffResetsSlides=true;
+    ds.targetResetsSlides=true;
 
     // Neo Geo detune
     if (ds.system[0]==DIV_SYSTEM_YM2610 || ds.system[0]==DIV_SYSTEM_YM2610_EXT) {
@@ -2079,6 +2086,13 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       ds.properNoiseLayout=false;
       ds.waveDutyIsVol=false;
     }
+    if (ds.version<45) {
+      ds.resetMacroOnPorta=true;
+      ds.legacyVolumeSlides=true;
+      ds.compatibleArpeggio=true;
+      ds.noteOffResetsSlides=true;
+      ds.targetResetsSlides=true;
+    }
 
     reader.readS(); // reserved
     int infoSeek=reader.readI();
@@ -2160,7 +2174,33 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       } else {
         reader.readC();
       }
-      for (int i=0; i<15; i++) reader.readC();
+
+      if (ds.version>=45) {
+        ds.resetMacroOnPorta=reader.readC();
+      } else {
+        reader.readC();
+      }
+      if (ds.version>=45) {
+        ds.legacyVolumeSlides=reader.readC();
+      } else {
+        reader.readC();
+      }
+      if (ds.version>=45) {
+        ds.compatibleArpeggio=reader.readC();
+      } else {
+        reader.readC();
+      }
+      if (ds.version>=45) {
+        ds.noteOffResetsSlides=reader.readC();
+      } else {
+        reader.readC();
+      }
+      if (ds.version>=45) {
+        ds.targetResetsSlides=reader.readC();
+      } else {
+        reader.readC();
+      }
+      for (int i=0; i<10; i++) reader.readC();
     } else {
       for (int i=0; i<20; i++) reader.readC();
     }
@@ -2536,7 +2576,12 @@ SafeWriter* DivEngine::saveFur() {
   w->writeC(song.loopModality);
   w->writeC(song.properNoiseLayout);
   w->writeC(song.waveDutyIsVol);
-  for (int i=0; i<15; i++) {
+  w->writeC(song.resetMacroOnPorta);
+  w->writeC(song.legacyVolumeSlides);
+  w->writeC(song.compatibleArpeggio);
+  w->writeC(song.noteOffResetsSlides);
+  w->writeC(song.targetResetsSlides);
+  for (int i=0; i<10; i++) {
     w->writeC(0);
   }
 
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 3a6d82b5..ce6e9aeb 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -11,8 +11,8 @@
 #include <map>
 #include <queue>
 
-#define DIV_VERSION "0.5.5pre2"
-#define DIV_ENGINE_VERSION 44
+#define DIV_VERSION "0.5.5pre3"
+#define DIV_ENGINE_VERSION 45
 
 enum DivStatusView {
   DIV_STATUS_NOTHING=0,