BLADERUNNER: Added auto save feature

Also fixed a bug in KIA save screen, where not selecting a save slot can
lead to overwriting other save game.

engines/bladerunner/bladerunner.cpp

@@ -109,7 +109,7 @@ BladeRunnerEngine::BladeRunnerEngine(OSystem *syst, const ADGameDescription *des
 	_playerDead      = false;
 	_speechSkipped   = false;
 	_gameOver        = false;
-	_gameAutoSave    = 0;
+	_gameAutoSave    = -1;
 	_gameIsLoading   = false;
 	_sceneIsLoading  = false;
 
@@ -309,7 +309,7 @@ Common::Error BladeRunnerEngine::run() {
 		_mouse->disable();
 
 		if (_gameOver) {
-			// autoSaveGame(4, 1); // TODO
+			autoSaveGame(4, true);
 			_endCredits->show();
 		}
 	}
@@ -836,7 +836,10 @@ void BladeRunnerEngine::gameTick() {
 		_settings->openNewScene();
 	}
 
-	// TODO: Autosave
+	if (_gameAutoSave >= 0) {
+		autoSaveGame(_gameAutoSave, false);
+		_gameAutoSave = -1;
+	}
 
 	//probably not needed, this version of tick is just loading data from buffer
 	//_audioMixer->tick();
@@ -1933,6 +1936,56 @@ void BladeRunnerEngine::newGame(int difficulty) {
 	_settings->setStartingGame();
 }
 
+void BladeRunnerEngine::autoSaveGame(int textId, bool endgame) {
+	TextResource textAutoSave(this);
+	if (!textAutoSave.open("AUTOSAVE")) {
+		return;
+	}
+
+	SaveStateList saveList = BladeRunner::SaveFileManager::list(getTargetName());
+
+	// Find first available save slot
+	int slot = -1;
+	int maxSlot = -1;
+	for (int i = 0; i < (int)saveList.size(); ++i) {
+		maxSlot = MAX(maxSlot, saveList[i].getSaveSlot());
+		if (saveList[i].getSaveSlot() != i) {
+			slot = i;
+			break;
+		}
+	}
+
+	if (slot == -1) {
+		slot = maxSlot + 1;
+	}
+
+	Common::OutSaveFile *saveFile = BladeRunner::SaveFileManager::openForSaving(getTargetName(), slot);
+	if (saveFile == nullptr || saveFile->err()) {
+		delete saveFile;
+	}
+
+	BladeRunner::SaveFileHeader header;
+	if (endgame) {
+		header._name = "END_GAME_STATE";
+	} else {
+		header._name = textAutoSave.getText(textId);
+	}
+
+	BladeRunner::SaveFileManager::writeHeader(*saveFile, header);
+
+	Graphics::Surface thumbnail = generateThumbnail();
+
+	_time->pause();
+	saveGame(*saveFile, thumbnail);
+	_time->resume();
+
+	saveFile->finalize();
+
+	thumbnail.free();
+
+	delete saveFile;
+}
+
 void BladeRunnerEngine::ISez(const Common::String &str) {
 	debug("\t%s", str.c_str());
 }

engines/bladerunner/bladerunner.h

@@ -286,7 +286,7 @@ public:
 	bool saveGame(Common::WriteStream &stream, const Graphics::Surface &thumbnail);
 	bool loadGame(Common::SeekableReadStream &stream);
 	void newGame(int difficulty);
-	void autoSaveGame();
+	void autoSaveGame(int textId, bool endgame);
 
 	void ISez(const Common::String &str);
 

engines/bladerunner/script/script.cpp

@@ -1546,8 +1546,6 @@ bool ScriptBase::Game_Over() {
 void ScriptBase::Autosave_Game(int textId) {
 	debugC(kDebugScript, "Autosave_Game(%d)", textId);
 	_vm->_gameAutoSave = textId;
-	// TODO
-	warning("Autosave not yet implemented");
 }
 
 void ScriptBase::I_Sez(const char *str) {

engines/bladerunner/ui/kia_section_save.cpp

@@ -366,7 +366,9 @@ void KIASectionSave::save() {
 		slot = _saveList[_selectedLineId].getSaveSlot();
 	} else {
 		// Find first available save slot
+		int maxSlot = -1;
 		for (int i = 0; i < (int)_saveList.size(); ++i) {
+			maxSlot = MAX(maxSlot, _saveList[i].getSaveSlot());
 			if (_saveList[i].getSaveSlot() != i) {
 				slot = i;
 				break;
@@ -374,7 +376,7 @@ void KIASectionSave::save() {
 		}
 
 		if (slot == -1) {
-			slot = _saveList.size();
+			slot = maxSlot + 1;
 		}
 	}