Implemented a few more harmless GPL2 commands

svn-id: r44958

4 files changed, 41 insertions, 6 deletions

diff --git a/engines/draci/game.cpp b/engines/draci/game.cpp
index 34549df416..6d0c929fc6 100644
--- a/engines/draci/game.cpp
+++ b/engines/draci/game.cpp
@@ -219,6 +219,7 @@ void Game::init() {
 	setRoomNum(kNoEscRoom);
 	rememberRoomNumAsPrevious();
 	scheduleEnteringRoomUsingGate(_info._startRoom, 0);
+	_pushedNewRoom = _pushedNewGate = -1;
 }
 
 void Game::loop() {
@@ -1426,6 +1427,18 @@ void Game::scheduleEnteringRoomUsingGate(int room, int gate) {
 	_newGate = gate;
 }
 
+void Game::pushNewRoom() {
+	_pushedNewRoom = _newRoom;
+	_pushedNewGate = _newGate;
+}
+
+void Game::popNewRoom() {
+	if (_loopStatus != kStatusInventory && _pushedNewRoom >= 0) {
+		scheduleEnteringRoomUsingGate(_pushedNewRoom, _pushedNewGate);
+		_pushedNewRoom = _pushedNewGate = -1;
+	}
+}
+
 void Game::setLoopStatus(LoopStatus status) {
 	_loopStatus = status;
 }
diff --git a/engines/draci/game.h b/engines/draci/game.h
index 57f0c799ae..54d4a6844c 100644
--- a/engines/draci/game.h
+++ b/engines/draci/game.h
@@ -281,6 +281,8 @@ public:
 	int getPreviousRoomNum() const;
 	void rememberRoomNumAsPrevious();
 	void scheduleEnteringRoomUsingGate(int room, int gate);
+	void pushNewRoom();
+	void popNewRoom();
 
 	double getPers0() const;
 	double getPersStep() const;
@@ -371,6 +373,8 @@ private:
 	int _newRoom;
 	int _newGate;
 	int _previousRoom;
+	int _pushedNewRoom;	// used in GPL programs
+	int _pushedNewGate;
 
 	uint *_dialogueOffsets;
 	int _currentDialogue;
diff --git a/engines/draci/script.cpp b/engines/draci/script.cpp
index ecdca91435..1650e2b72f 100644
--- a/engines/draci/script.cpp
+++ b/engines/draci/script.cpp
@@ -70,9 +70,9 @@ void Script::setupCommandList() {
 		{ 15, 1, "ExecInit", 			1, { 3 }, &Script::execInit },
 		{ 15, 2, "ExecLook", 			1, { 3 }, &Script::execLook },
 		{ 15, 3, "ExecUse", 			1, { 3 }, &Script::execUse },
-		{ 16, 1, "RepaintInventory", 	0, { 0 }, NULL },
-		{ 16, 2, "ExitInventory", 		0, { 0 }, NULL },
-		{ 17, 1, "ExitMap", 			0, { 0 }, NULL },
+		{ 16, 1, "RepaintInventory", 	0, { 0 }, NULL },	// not used in the original game files
+		{ 16, 2, "ExitInventory", 		0, { 0 }, NULL },	// not used in the original game files
+		{ 17, 1, "ExitMap", 			0, { 0 }, NULL },	// not used in the original game files
 		{ 18, 1, "LoadMusic", 			1, { 2 }, NULL },
 		{ 18, 2, "StartMusic", 			0, { 0 }, NULL },
 		{ 18, 3, "StopMusic", 			0, { 0 }, NULL },
@@ -87,9 +87,12 @@ void Script::setupCommandList() {
 		{ 22, 2, "EnableQuickHero", 	0, { 0 }, NULL },
 		{ 23, 1, "DisableSpeedText", 	0, { 0 }, NULL },
 		{ 23, 2, "EnableSpeedText", 	0, { 0 }, NULL },
-		{ 24, 1, "QuitGame", 			0, { 0 }, NULL },
-		{ 25, 1, "PushNewRoom", 		0, { 0 }, NULL },
-		{ 25, 2, "PopNewRoom", 			0, { 0 }, NULL },
+		{ 24, 1, "QuitGame", 			0, { 0 }, &Script::quitGame },
+		{ 25, 1, "PushNewRoom", 		0, { 0 }, &Script::pushNewRoom },
+		{ 25, 2, "PopNewRoom", 			0, { 0 }, &Script::popNewRoom },
+		// The following commands are not even defined in the game
+		// sources, but their numbers are allocated for internal
+		// purposes of the old player.
 		{ 26, 1, "ShowCheat", 			0, { 0 }, NULL },
 		{ 26, 2, "HideCheat", 			0, { 0 }, NULL },
 		{ 26, 3, "ClearCheat", 			1, { 1 }, NULL },
@@ -823,6 +826,18 @@ void Script::endCurrentProgram() {
 	_endProgram = true;
 }
 
+void Script::quitGame(Common::Queue<int> &params) {
+	_vm->_game->setQuit(true);
+}
+
+void Script::pushNewRoom(Common::Queue<int> &params) {
+	_vm->_game->pushNewRoom();
+}
+
+void Script::popNewRoom(Common::Queue<int> &params) {
+	_vm->_game->popNewRoom();
+}
+
 /**
  * @brief Evaluates mathematical expressions
  * @param reader Stream reader set to the beginning of the expression
diff --git a/engines/draci/script.h b/engines/draci/script.h
index c9f1a61e66..57412215ba 100644
--- a/engines/draci/script.h
+++ b/engines/draci/script.h
@@ -133,6 +133,9 @@ private:
 	void setPalette(Common::Queue<int> &params);
 	void blackPalette(Common::Queue<int> &params);
 	void loadPalette(Common::Queue<int> &params);
+	void quitGame(Common::Queue<int> &params);
+	void pushNewRoom(Common::Queue<int> &params);
+	void popNewRoom(Common::Queue<int> &params);
 
 	int operAnd(int op1, int op2) const;
 	int operOr(int op1, int op2) const;