add intro tune, part 2

CMakeLists.txt

@@ -600,6 +600,8 @@ src/gui/fileDialog.cpp
 src/gui/intConst.cpp
 src/gui/guiConst.cpp
 
+src/gui/introTune.cpp
+
 src/gui/about.cpp
 src/gui/channels.cpp
 src/gui/chanOsc.cpp

src/engine/engine.cpp

@@ -1469,6 +1469,42 @@ void DivEngine::createNew(const char* description, String sysName, bool inBase64
   BUSY_END;
 }
 
+void DivEngine::createNewFromDefaults() {
+  quitDispatch();
+  BUSY_BEGIN;
+  saveLock.lock();
+  song.unload();
+  song=DivSong();
+  changeSong(0);
+
+  String preset=getConfString("initialSys2","");
+  bool oldVol=getConfInt("configVersion",DIV_ENGINE_VERSION)<135;
+  if (preset.empty()) {
+    // try loading old preset
+    preset=decodeSysDesc(getConfString("initialSys",""));
+    oldVol=false;
+  }
+  logD("preset size %ld",preset.size());
+  if (preset.size()>0 && (preset.size()&3)==0) {
+    initSongWithDesc(preset.c_str(),true,oldVol);
+  }
+  String sysName=getConfString("initialSysName","");
+  if (sysName=="") {
+    song.systemName=getSongSystemLegacyName(song,!getConfInt("noMultiSystem",0));
+  } else {
+    song.systemName=sysName;
+  }
+
+  recalcChans();
+  saveLock.unlock();
+  BUSY_END;
+  initDispatch();
+  BUSY_BEGIN;
+  renderSamples();
+  reset();
+  BUSY_END;
+}
+
 void DivEngine::swapChannels(int src, int dest) {
   logV("swapping channel %d with %d",src,dest);
   if (src==dest) {

src/engine/engine.h

@@ -516,6 +516,7 @@ class DivEngine {
     String decodeSysDesc(String desc);
     // start fresh
     void createNew(const char* description, String sysName, bool inBase64=true);
+    void createNewFromDefaults();
     // load a file.
     bool load(unsigned char* f, size_t length);
     // save as .dmf.

src/engine/safeReader.h

@@ -40,7 +40,7 @@ struct EndOfFileException {
 };
 
 class SafeReader {
-  unsigned char* buf;
+  const unsigned char* buf;
   size_t len;
 
   size_t curSeek;
@@ -71,8 +71,8 @@ class SafeReader {
     String readStringToken();
     inline bool isEOF() { return curSeek >= len; };
 
-    SafeReader(void* b, size_t l):
-      buf((unsigned char*)b),
+    SafeReader(const void* b, size_t l):
+      buf((const unsigned char*)b),
       len(l),
       curSeek(0) {}
 };

src/gui/gui.cpp

@@ -38,6 +38,7 @@
 #include "guiConst.h"
 #include "intConst.h"
 #include "scaling.h"
+#include "introTune.h"
 #include <stdint.h>
 #include <zlib.h>
 #include <fmt/printf.h>
@@ -5665,6 +5666,12 @@ bool FurnaceGUI::init() {
     oldPat[i]=new DivPattern;
   }
 
+  if ((!tutorial.introPlayed || settings.alwaysPlayIntro>=2) && curFileName.empty()) {
+    unsigned char* introTemp=new unsigned char[intro_fur_len];
+    memcpy(introTemp,intro_fur,intro_fur_len);
+    e->load(introTemp,intro_fur_len);
+  }
+
   firstFrame=true;
 
   // TODO: MIDI mapping time!

src/gui/gui.h

@@ -2006,6 +2006,7 @@ class FurnaceGUI {
   void play(int row=0);
   void setOrder(unsigned char order, bool forced=false);
   void stop();
+  void endIntroTune();
 
   void previewNote(int refChan, int note, bool autoNote=false);
   void stopPreviewNote(SDL_Scancode scancode, bool autoNote=false);

src/gui/intro.cpp

@@ -71,6 +71,11 @@ void FurnaceGUI::drawImage(ImDrawList* dl, FurnaceGUIImages image, const ImVec2&
   dl->AddImageQuad(img,quad0,quad1,quad2,quad3,uv0,uv1,uv2,uv3,colorConverted);
 }
 
+void FurnaceGUI::endIntroTune() {
+  stop();
+  e->createNewFromDefaults();
+}
+
 void FurnaceGUI::drawIntro(double introTime, bool monitor) {
   if (monitor) {
     if (introTime<0.0) introTime=0.0;
@@ -264,6 +269,7 @@ void FurnaceGUI::drawIntro(double introTime, bool monitor) {
           if (introSkipDo) {
             introSkip+=ImGui::GetIO().DeltaTime;
             if (introSkip>=0.5) {
+              if (e->isPlaying()) endIntroTune();
               introPos=0.1;
               if (introSkip>=0.75) introPos=9.1;
             }
@@ -285,6 +291,12 @@ void FurnaceGUI::drawIntro(double introTime, bool monitor) {
     ImGui::End();
 
     if (mustClear<=0 && !monitor) {
+      if (!shortIntro && introPos<=0.0) {
+        e->setOrder(0);
+        e->setRepeatPattern(false);
+        play();
+      }
+      if (e->isPlaying() && introPos>=8.0 && !shortIntro) endIntroTune();
       introPos+=ImGui::GetIO().DeltaTime;
       if (introPos>=(shortIntro?1.0:9.0)) {
         introPos=10.0;

src/gui/introTune.h

@@ -0,0 +1,26 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2023 tildearrow and contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _INTRO_TUNE_H
+#define _INTRO_TUNE_H
+
+extern const unsigned char intro_fur[];
+extern const unsigned int intro_fur_len;
+
+#endif