allow saving patterns in old format

src/engine/engine.h

@@ -591,7 +591,7 @@ class DivEngine {
     SafeWriter* saveDMF(unsigned char version);
     // save as .fur.
     // if notPrimary is true then the song will not be altered
-    SafeWriter* saveFur(bool notPrimary=false);
+    SafeWriter* saveFur(bool notPrimary=false, bool newPatternFormat=true);
     // build a ROM file (TODO).
     // specify system to build ROM for.
     std::vector<DivROMExportOutput> buildROM(DivROMExportOptions sys);

src/engine/fileOps.cpp

@@ -5077,9 +5077,7 @@ DivDataErrors DivEngine::readAssetDirData(SafeReader& reader, std::vector<DivAss
   return DIV_DATA_SUCCESS;
 }
 
-#define NEW_PATTERN_FORMAT
-
-SafeWriter* DivEngine::saveFur(bool notPrimary) {
+SafeWriter* DivEngine::saveFur(bool notPrimary, bool newPatternFormat) {
   saveLock.lock();
   std::vector<int> subSongPtr;
   std::vector<int> sysFlagsPtr;
@@ -5514,7 +5512,7 @@ SafeWriter* DivEngine::saveFur(bool notPrimary) {
     DivPattern* pat=song.subsong[i.subsong]->pat[i.chan].getPattern(i.pat,false);
     patPtr.push_back(w->tell());
 
-#ifdef NEW_PATTERN_FORMAT
+    if (newPatternFormat) {
       w->write("PATN",4);
       blockStartSeek=w->tell();
       w->writeI(0);
@@ -5613,7 +5611,7 @@ SafeWriter* DivEngine::saveFur(bool notPrimary) {
 
       // stop
       w->writeC(0xff);
-#else
+    } else {
       w->write("PATR",4);
       blockStartSeek=w->tell();
       w->writeI(0);
@@ -5639,7 +5637,7 @@ SafeWriter* DivEngine::saveFur(bool notPrimary) {
       }
 
       w->writeString(pat->name,false);
-#endif
+    }
 
     blockEndSeek=w->tell();
     w->seek(blockStartSeek,SEEK_SET);

src/gui/gui.cpp

@@ -1975,7 +1975,7 @@ int FurnaceGUI::save(String path, int dmfVersion) {
     if (dmfVersion<24) dmfVersion=24;
     w=e->saveDMF(dmfVersion);
   } else {
-    w=e->saveFur();
+    w=e->saveFur(false,settings.newPatternFormat);
   }
   if (w==NULL) {
     lastError=e->getLastError();
@@ -5674,7 +5674,7 @@ bool FurnaceGUI::loop() {
               }
             }
             logD("saving backup...");
-            SafeWriter* w=e->saveFur(true);
+            SafeWriter* w=e->saveFur(true,true);
             logV("writing file...");
 
             if (w!=NULL) {

src/gui/gui.h

@@ -1425,6 +1425,7 @@ class FurnaceGUI {
     int iCannotWait;
     int orderButtonPos;
     int compress;
+    int newPatternFormat;
     unsigned int maxUndoSteps;
     String mainFontPath;
     String patFontPath;
@@ -1571,6 +1572,7 @@ class FurnaceGUI {
       iCannotWait(0),
       orderButtonPos(2),
       compress(1),
+      newPatternFormat(1),
       maxUndoSteps(100),
       mainFontPath(""),
       patFontPath(""),

src/gui/settings.cpp

@@ -662,6 +662,13 @@ void FurnaceGUI::drawSettings() {
             ImGui::SetTooltip("use zlib to compress saved songs.");
           }
 
+          bool newPatternFormatB=settings.newPatternFormat;
+          if (ImGui::Checkbox("Use new pattern format when saving",&newPatternFormatB)) {
+            settings.newPatternFormat=newPatternFormatB;
+          }
+          if (ImGui::IsItemHovered()) {
+            ImGui::SetTooltip("use a packed format which saves space when saving songs.\ndisable if you need compatibility with older Furnace and/or tools\nwhich do not support this format.");
+          }
 
           bool cursorFollowsOrderB=settings.cursorFollowsOrder;
           if (ImGui::Checkbox("Cursor follows current order when moving it",&cursorFollowsOrderB)) {
@@ -2683,6 +2690,7 @@ void FurnaceGUI::syncSettings() {
   settings.iCannotWait=e->getConfInt("iCannotWait",0);
   settings.orderButtonPos=e->getConfInt("orderButtonPos",2);
   settings.compress=e->getConfInt("compress",1);
+  settings.newPatternFormat=e->getConfInt("newPatternFormat",1);
 
   clampSetting(settings.mainFontSize,2,96);
   clampSetting(settings.patFontSize,2,96);
@@ -2804,6 +2812,7 @@ void FurnaceGUI::syncSettings() {
   clampSetting(settings.iCannotWait,0,1);
   clampSetting(settings.orderButtonPos,0,2);
   clampSetting(settings.compress,0,1);
+  clampSetting(settings.newPatternFormat,0,1);
 
   if (settings.exportLoops<0.0) settings.exportLoops=0.0;
   if (settings.exportFadeOut<0.0) settings.exportFadeOut=0.0;
@@ -3020,6 +3029,7 @@ void FurnaceGUI::commitSettings() {
   e->setConf("iCannotWait",settings.iCannotWait);
   e->setConf("orderButtonPos",settings.orderButtonPos);
   e->setConf("compress",settings.compress);
+  e->setConf("newPatternFormat",settings.newPatternFormat);
 
   // colors
   for (int i=0; i<GUI_COLOR_MAX; i++) {