Implemented vertical scrolling

svn-id: r25401

16 files changed, 325 insertions, 236 deletions

diff --git a/engines/gob/draw.cpp b/engines/gob/draw.cpp
index b4dd65ef6f..d1d19d0179 100644
--- a/engines/gob/draw.cpp
+++ b/engines/gob/draw.cpp
@@ -129,10 +129,11 @@ Draw::Draw(GobEngine *vm) : _vm(vm) {
 
 	_cursorTimeKey = 0;
 
-	warning("GOB2 Stub! _word_2E8E2, _word_2FC9C, _word_2FC9E, _word_2E51F, _off_2E51B, _off_2E517");
+	_scrollOffsetX = 0;
+	_scrollOffsetY = 0;
+
+	warning("GOB2 Stub! _word_2E8E2, _word_2E51F, _off_2E51B, _off_2E517");
 	_word_2E8E2 = 2;
-	_word_2FC9C = 0;
-	_word_2FC9E = 0;
 	_word_2E51F = 0;
 	_off_2E51B = 0;
 	_off_2E517 = 0;
@@ -157,7 +158,8 @@ void Draw::invalidateRect(int16 left, int16 top, int16 right, int16 bottom) {
 		bottom = temp;
 	}
 
-	if (left > (_vm->_video->_surfWidth - 1) || right < 0 || top > 199 || bottom < 0)
+	if ((left > (_vm->_video->_surfWidth - 1)) || (right < 0) ||
+			(top > (_vm->_video->_surfHeight - 1)) || (bottom < 0))
 		return;
 
 	_noInvalidated = 0;
@@ -166,7 +168,7 @@ void Draw::invalidateRect(int16 left, int16 top, int16 right, int16 bottom) {
 		_invalidatedLefts[0] = 0;
 		_invalidatedTops[0] = 0;
 		_invalidatedRights[0] = _vm->_video->_surfWidth - 1;
-		_invalidatedBottoms[0] = 199;
+		_invalidatedBottoms[0] = _vm->_video->_surfHeight - 1;
 		_invalidatedCount = 1;
 		return;
 	}
@@ -180,8 +182,8 @@ void Draw::invalidateRect(int16 left, int16 top, int16 right, int16 bottom) {
 	if (top < 0)
 		top = 0;
 
-	if (bottom > 199)
-		bottom = 199;
+	if (bottom > (_vm->_video->_surfHeight - 1))
+		bottom = _vm->_video->_surfHeight - 1;
 
 	left &= 0xfff0;
 	right |= 0x000f;
@@ -266,7 +268,7 @@ void Draw::blitInvalidated(void) {
 		clearPalette();
 
 		_vm->_video->drawSprite(_backSurface, _frontSurface, 0, 0,
-				_vm->_video->_surfWidth - 1, 199, 0, 0, 0);
+				_vm->_video->_surfWidth - 1, _vm->_video->_surfHeight - 1, 0, 0, 0);
 		setPalette();
 		_invalidatedCount = 0;
 		_noInvalidated = 1;
diff --git a/engines/gob/draw.h b/engines/gob/draw.h
index 07a53bc073..8859b93088 100644
--- a/engines/gob/draw.h
+++ b/engines/gob/draw.h
@@ -114,8 +114,8 @@ public:
 	int16 _palLoadData2[4];
 		
 	int16 _word_2E8E2;
-	int16 _word_2FC9C;
-	int16 _word_2FC9E;
+	int16 _scrollOffsetY;
+	int16 _scrollOffsetX;
 	int16 _word_2E51F;
 	Video::SurfaceDesc *_off_2E51B;
 	Video::SurfaceDesc *_off_2E517;
diff --git a/engines/gob/draw_v2.cpp b/engines/gob/draw_v2.cpp
index 86998c1436..77e95921b7 100644
--- a/engines/gob/draw_v2.cpp
+++ b/engines/gob/draw_v2.cpp
@@ -957,8 +957,8 @@ void Draw_v2::animateCursor(int16 cursor) {
 }
 
 void Draw_v2::initScreen(void) {
-	_word_2FC9C = 0;
-	_word_2FC9E = 0;
+	_scrollOffsetX = 0;
+	_scrollOffsetY = 0;
 
 	if (_word_2E51F != 0) {
 		_off_2E51B = new Video::SurfaceDesc;
@@ -974,7 +974,7 @@ void Draw_v2::initScreen(void) {
 		_off_2E517->vidPtr = _frontSurface->vidPtr +
 			((_frontSurface->width * _frontSurface->height ) / 4);
 	}
-	initBigSprite(21, _vm->_video->_surfWidth, 200, 0);
+	initBigSprite(21, _vm->_video->_surfWidth, _vm->_video->_surfHeight, 0);
 	_backSurface = _spritesArray[21];
 	_vm->_video->clearSurf(_backSurface);
 	
@@ -1002,7 +1002,7 @@ void Draw_v2::closeScreen(void) {
 	if (_off_2E51B != 0) {
 		memcpy(_frontSurface, _off_2E51B, sizeof(Video::SurfaceDesc));
 		_frontSurface->width = _vm->_video->_surfWidth;
-		_frontSurface->height = 200;
+		_frontSurface->height = _vm->_video->_surfHeight;
 		delete _off_2E51B;
 		delete _off_2E517;
 		_off_2E51B = 0;
diff --git a/engines/gob/game_v2.cpp b/engines/gob/game_v2.cpp
index 1b6cd1f123..c85482fb6c 100644
--- a/engines/gob/game_v2.cpp
+++ b/engines/gob/game_v2.cpp
@@ -452,15 +452,15 @@ int16 Game_v2::checkCollisions(char handleMouse, int16 deltaTime, int16 *pResId,
 							 &_mouseButtons, handleMouse);
 
 		// TODO: What of this is needed?
-		// Scrolling?
+		// Mouse position calculation in scrollable screen?
 		int16 width;
 		int16 height;
 		int16 sWidth;
 		int16 sHeight;
 		int16 cursorRight;
 		int16 cursorBottom;
-		int16 oldWord_2FC9C;
-		int16 oldWord_2FC9E;
+		int16 oldOffY;
+		int16 oldOffX;
 		if ((_vm->_global->_videoMode == 0x14) && (handleMouse != 0)) {
 			width = _vm->_draw->_frontSurface->width;
 			height = _vm->_draw->_frontSurface->height;
@@ -470,64 +470,65 @@ int16 Game_v2::checkCollisions(char handleMouse, int16 deltaTime, int16 *pResId,
 				sHeight = _vm->_global->_primaryHeight;
 				if (_vm->_draw->_off_2E51B != 0)
 					sHeight -= _vm->_draw->_off_2E51B->height;
-				oldWord_2FC9E = _vm->_draw->_word_2FC9E;
-				oldWord_2FC9C = _vm->_draw->_word_2FC9C;
-				if ((width > sWidth) && (_vm->_global->_inter_mouseX >= _vm->_draw->_word_2FC9E)) {
+				oldOffX = _vm->_draw->_scrollOffsetX;
+				oldOffY = _vm->_draw->_scrollOffsetY;
+				if ((width > sWidth) && (_vm->_global->_inter_mouseX >= _vm->_draw->_scrollOffsetX)) {
 					cursorRight = _vm->_global->_inter_mouseX + _vm->_draw->_cursorWidth;
-					if (cursorRight > (_vm->_draw->_word_2FC9E + sWidth))
-						_vm->_draw->_word_2FC9E = MIN(cursorRight - sWidth, width - sWidth);
-				} else if (_vm->_global->_inter_mouseX < _vm->_draw->_word_2FC9E)
-					_vm->_draw->_word_2FC9E = _vm->_global->_inter_mouseX;
+					if (cursorRight > (_vm->_draw->_scrollOffsetX + sWidth))
+						_vm->_draw->_scrollOffsetX = MIN(cursorRight - sWidth, width - sWidth);
+				} else if (_vm->_global->_inter_mouseX < _vm->_draw->_scrollOffsetX)
+					_vm->_draw->_scrollOffsetX = _vm->_global->_inter_mouseX;
 				height = _vm->_draw->_frontSurface->height;
-				if ((height > sHeight) && (_vm->_global->_inter_mouseY >= _vm->_draw->_word_2FC9C)) {
+				if ((height > sHeight) && (_vm->_global->_inter_mouseY >= _vm->_draw->_scrollOffsetY)) {
 					cursorBottom = _vm->_global->_inter_mouseY + _vm->_draw->_cursorHeight;
-					if (cursorBottom > (_vm->_draw->_word_2FC9C + sHeight))
-						_vm->_draw->_word_2FC9C = MIN(cursorBottom - sHeight, height - sHeight);
-				} else if (_vm->_global->_inter_mouseY < _vm->_draw->_word_2FC9C)
-					_vm->_draw->_word_2FC9C = _vm->_global->_inter_mouseY;
-				if ((oldWord_2FC9E != _vm->_draw->_word_2FC9E) ||
-						(oldWord_2FC9C != _vm->_draw->_word_2FC9C)) {
+					if (cursorBottom > (_vm->_draw->_scrollOffsetY + sHeight))
+						_vm->_draw->_scrollOffsetY = MIN(cursorBottom - sHeight, height - sHeight);
+				} else if (_vm->_global->_inter_mouseY < _vm->_draw->_scrollOffsetY)
+					_vm->_draw->_scrollOffsetY = _vm->_global->_inter_mouseY;
+				if ((oldOffX != _vm->_draw->_scrollOffsetX) ||
+						(oldOffY != _vm->_draw->_scrollOffsetY)) {
 					if (_byte_2FC9B == 0) {
-						_vm->_draw->_word_2FC9E = oldWord_2FC9E;
-						_vm->_draw->_word_2FC9C = oldWord_2FC9C;
+						_vm->_draw->_scrollOffsetX = oldOffX;
+						_vm->_draw->_scrollOffsetY = oldOffY;
 						if ((_vm->_draw->_frontSurface->width > sWidth) && 
-								(_vm->_global->_inter_mouseX >= oldWord_2FC9E)) {
+								(_vm->_global->_inter_mouseX >= oldOffX)) {
 							if ((_vm->_global->_inter_mouseX + _vm->_draw->_cursorWidth) >
-									(_vm->_draw->_word_2FC9E + sWidth))
-								_vm->_global->_inter_mouseX = _vm->_draw->_word_2FC9E +
+									(_vm->_draw->_scrollOffsetX + sWidth))
+								_vm->_global->_inter_mouseX = _vm->_draw->_scrollOffsetX +
 									sWidth - _vm->_draw->_cursorWidth;
-						} else if (_vm->_global->_inter_mouseX < oldWord_2FC9E)
-							_vm->_global->_inter_mouseX = oldWord_2FC9E;
+						} else if (_vm->_global->_inter_mouseX < oldOffX)
+							_vm->_global->_inter_mouseX = oldOffX;
 
 						if ((_vm->_draw->_frontSurface->height > sHeight) && 
-								(_vm->_global->_inter_mouseY >= _vm->_draw->_word_2FC9C)) {
+								(_vm->_global->_inter_mouseY >= _vm->_draw->_scrollOffsetY)) {
 							if ((_vm->_global->_inter_mouseY + _vm->_draw->_cursorHeight) >
-									(_vm->_draw->_word_2FC9C + sHeight))
-								_vm->_global->_inter_mouseY = _vm->_draw->_word_2FC9C +
+									(_vm->_draw->_scrollOffsetY + sHeight))
+								_vm->_global->_inter_mouseY = _vm->_draw->_scrollOffsetY +
 									sHeight - _vm->_draw->_cursorHeight;
-						} else if (_vm->_global->_inter_mouseY < oldWord_2FC9E)
-							_vm->_global->_inter_mouseY = _vm->_draw->_word_2FC9C;
+						} else if (_vm->_global->_inter_mouseY < oldOffX)
+							_vm->_global->_inter_mouseY = _vm->_draw->_scrollOffsetY;
 					} else {
-						if (oldWord_2FC9E > _vm->_draw->_word_2FC9E) {
-							_vm->_global->_inter_mouseX += (oldWord_2FC9E - _vm->_draw->_word_2FC9E) / 2;
-							_vm->_draw->_word_2FC9E += (oldWord_2FC9E - _vm->_draw->_word_2FC9E) / 2;
+						if (oldOffX > _vm->_draw->_scrollOffsetX) {
+							_vm->_global->_inter_mouseX += (oldOffX - _vm->_draw->_scrollOffsetX) / 2;
+							_vm->_draw->_scrollOffsetX += (oldOffX - _vm->_draw->_scrollOffsetX) / 2;
 						} else {
-							_vm->_global->_inter_mouseX -= (_vm->_draw->_word_2FC9E - oldWord_2FC9E) / 2;
-							_vm->_draw->_word_2FC9E -= (_vm->_draw->_word_2FC9E - oldWord_2FC9E) / 2;
+							_vm->_global->_inter_mouseX -= (_vm->_draw->_scrollOffsetX - oldOffX) / 2;
+							_vm->_draw->_scrollOffsetX -= (_vm->_draw->_scrollOffsetX - oldOffX) / 2;
 						}
-						if (oldWord_2FC9C > _vm->_draw->_word_2FC9C) {
-							_vm->_global->_inter_mouseY += (oldWord_2FC9C - _vm->_draw->_word_2FC9C) / 2;
-							_vm->_draw->_word_2FC9C += (oldWord_2FC9C - _vm->_draw->_word_2FC9C) / 2;
-							if (_vm->_draw->_word_2FC9C < 2)
-								_vm->_draw->_word_2FC9C = 0;
+						if (oldOffY > _vm->_draw->_scrollOffsetY) {
+							_vm->_global->_inter_mouseY += (oldOffY - _vm->_draw->_scrollOffsetY) / 2;
+							_vm->_draw->_scrollOffsetY += (oldOffY - _vm->_draw->_scrollOffsetY) / 2;
+							if (_vm->_draw->_scrollOffsetY < 2)
+								_vm->_draw->_scrollOffsetY = 0;
 						} else {
-							_vm->_global->_inter_mouseY -= (_vm->_draw->_word_2FC9C - oldWord_2FC9C) / 2;
-							_vm->_draw->_word_2FC9C -= (_vm->_draw->_word_2FC9C - oldWord_2FC9C) / 2;
+							_vm->_global->_inter_mouseY -= (_vm->_draw->_scrollOffsetY - oldOffY) / 2;
+							_vm->_draw->_scrollOffsetY -= (_vm->_draw->_scrollOffsetY - oldOffY) / 2;
 						}
 						if (_vm->_draw->_off_2E51B == 0)
-							warning("_vid_setPixelShift(_vm->_draw->_word_2FC9E, _vm->_draw->_word_2FC9C);");
+							_vm->_util->setScrollOffset();
 						else
-							warning("_vid_setPixelShift(_vm->_draw->_word_2FC9E, _vm->_draw->_word_2FC9C + _vm->_draw->_off_2E51B->height);");
+							_vm->_util->setScrollOffset(_vm->_draw->_scrollOffsetX,
+									_vm->_draw->_scrollOffsetY + _vm->_draw->_off_2E51B->height);;
 					}
 					_vm->_util->setMousePos(_vm->_global->_inter_mouseX, _vm->_global->_inter_mouseY);
 				}
@@ -646,7 +647,7 @@ void Game_v2::prepareStart(void) {
 
 	_vm->_draw->initScreen();
 	_vm->_video->fillRect(_vm->_draw->_frontSurface, 0, 0,
-			_vm->_video->_surfWidth - 1, 199, 1);
+			_vm->_video->_surfWidth - 1, _vm->_video->_surfHeight - 1, 1);
 
 	_vm->_util->setMousePos(152, 92);
 
diff --git a/engines/gob/init_v2.cpp b/engines/gob/init_v2.cpp
index 129f75ebd5..e8ab0283da 100644
--- a/engines/gob/init_v2.cpp
+++ b/engines/gob/init_v2.cpp
@@ -43,7 +43,8 @@ void Init_v2::soundVideo(int32 smallHeap, int16 flag) {
 		    _vm->_global->_videoMode);
 
 	_vm->_draw->_frontSurface = &_vm->_global->_primarySurfDesc;
-	_vm->_video->initSurfDesc(_vm->_global->_videoMode, _vm->_video->_surfWidth, 200, 0x80);
+	_vm->_video->initSurfDesc(_vm->_global->_videoMode, _vm->_video->_surfWidth,
+			_vm->_video->_surfHeight, 0x80);
 
 	_vm->_global->_mousePresent = 1;
 
@@ -61,8 +62,8 @@ void Init_v2::soundVideo(int32 smallHeap, int16 flag) {
 	_vm->_global->_pPaletteDesc->unused2 = _vm->_global->_unusedPalette2;
 
 	if (_vm->_global->_videoMode != 0)
-		_vm->_video->initSurfDesc(_vm->_global->_videoMode, _vm->_video->_surfWidth, 200,
-				PRIMARY_SURFACE);
+		_vm->_video->initSurfDesc(_vm->_global->_videoMode, _vm->_video->_surfWidth,
+				_vm->_video->_surfHeight, PRIMARY_SURFACE);
 }
 
 } // End of namespace Gob
diff --git a/engines/gob/inter.cpp b/engines/gob/inter.cpp
index ef9a34e23c..7515be82a9 100644
--- a/engines/gob/inter.cpp
+++ b/engines/gob/inter.cpp
@@ -190,60 +190,6 @@ void Inter::funcBlock(int16 retFlag) {
 	return;
 }
 
-void Inter::checkSwitchTable(char **ppExec) {
-	int16 i;
-	int16 len;
-	char found;
-	int32 value;
-	char notFound;
-	char defFlag;
-
-	found = 0;
-	notFound = 1;
-	*ppExec = 0;
-	value = _vm->_parse->parseVarIndex();
-	value = VAR_OFFSET(value);
-
-	do {
-		len = *(int8*)_vm->_global->_inter_execPtr++; // must be a signed char typ and char is not default signed on all platforms.
-
-		if (len == -5)
-			break;
-
-		for (i = 0; i < len; i++) {
-			evalExpr(0);
-
-			if (_terminate)
-				return;
-
-			if (_vm->_global->_inter_resVal == value) {
-				found = 1;
-				notFound = 0;
-			}
-		}
-
-		if (found != 0)
-			*ppExec = _vm->_global->_inter_execPtr;
-
-		_vm->_global->_inter_execPtr += READ_LE_UINT16(_vm->_global->_inter_execPtr + 2) + 2;
-		found = 0;
-	} while (len != -5);
-
-	if (len != -5)
-		_vm->_global->_inter_execPtr++;
-
-	defFlag = *_vm->_global->_inter_execPtr;
-	defFlag >>= 4;
-	if (defFlag != 4)
-		return;
-	_vm->_global->_inter_execPtr++;
-
-	if (notFound)
-		*ppExec = _vm->_global->_inter_execPtr;
-
-	_vm->_global->_inter_execPtr += READ_LE_UINT16(_vm->_global->_inter_execPtr + 2) + 2;
-}
-
 void Inter::callSub(int16 retFlag) {
 	int16 block;
 	while (!_vm->_quitRequested && _vm->_global->_inter_execPtr != 0 && (char *)_vm->_global->_inter_execPtr != _vm->_game->_totFileData) {
diff --git a/engines/gob/inter.h b/engines/gob/inter.h
index ef75815e69..a6d25f53ad 100644
--- a/engines/gob/inter.h
+++ b/engines/gob/inter.h
@@ -58,11 +58,11 @@ public:
 	char evalExpr(int16 *pRes);
 	char evalBoolResult(void);
 	void funcBlock(int16 retFlag);
-	void checkSwitchTable(char **ppExec);
 	void callSub(int16 retFlag);
 	void initControlVars(char full);
 	void renewTimeInVars(void);
 	void manipulateMap(int16 xPos, int16 yPos, int16 item);
+	virtual void checkSwitchTable(char **ppExec) = 0;
 	virtual int16 loadSound(int16 slot) = 0;
 	virtual void storeKey(int16 key) = 0;
 	virtual void storeMouse(void) = 0;
@@ -95,6 +95,7 @@ class Inter_v1 : public Inter {
 public:
 	Inter_v1(GobEngine *vm);
 	virtual ~Inter_v1() {};
+	virtual void checkSwitchTable(char **ppExec);
 	virtual int16 loadSound(int16 slot);
 	virtual void storeKey(int16 key);
 	virtual void storeMouse(void);
@@ -288,6 +289,7 @@ class Inter_v2 : public Inter_v1 {
 public:
 	Inter_v2(GobEngine *vm);
 	virtual ~Inter_v2() {};
+	virtual void checkSwitchTable(char **ppExec);
 	virtual int16 loadSound(int16 search);
 	virtual void storeKey(int16 key);
 	virtual void storeMouse(void);
diff --git a/engines/gob/inter_bargon.cpp b/engines/gob/inter_bargon.cpp
index e9f73d893e..1e3ab00e76 100644
--- a/engines/gob/inter_bargon.cpp
+++ b/engines/gob/inter_bargon.cpp
@@ -743,11 +743,11 @@ void Inter_Bargon::oBargon_intro2(int16 &extraData, int32 *retVarPtr,
 	_vm->_video->drawSprite(surface, _vm->_draw->_frontSurface, 0, 0, 319, 199, 0, 0, 0);
 	_vm->_video->drawPackedSprite("2ille4.ims", surface);
 	_vm->_video->drawSprite(surface, _vm->_draw->_frontSurface, 0, 0, 319, 199, 320, 0, 0);
-	_vm->_util->setScrollOffset(320);
+	_vm->_util->setScrollOffset(320, 0);
 	_vm->_palanim->fade(_vm->_global->_pPaletteDesc, -2, 0);
 	_vm->_util->longDelay(1000);
 	for (i = 320; i >= 0; i--) {
-		_vm->_util->setScrollOffset(i);
+		_vm->_util->setScrollOffset(i, 0);
 		if ((_vm->_game->checkKeys(&mouseX, &mouseY, &buttons, 0) == 0x11B) ||
 				_vm->_quitRequested) {
 			_vm->_palanim->fade(0, -2, 0);
@@ -760,7 +760,7 @@ void Inter_Bargon::oBargon_intro2(int16 &extraData, int32 *retVarPtr,
 		}
 	}
 	if (!_vm->_quitRequested)
-		_vm->_util->setScrollOffset(0);
+		_vm->_util->setScrollOffset(0, 0);
 	_vm->_video->freeSurfDesc(surface);
 	if (VAR(57) == ((uint32) -1))
 		return;
diff --git a/engines/gob/inter_v1.cpp b/engines/gob/inter_v1.cpp
index 1e8084febb..0a2468a4c8 100644
--- a/engines/gob/inter_v1.cpp
+++ b/engines/gob/inter_v1.cpp
@@ -646,6 +646,117 @@ void Inter_v1::setupOpcodes(void) {
 	_opcodesGoblinV1 = opcodesGoblin;
 }
 
+void Inter_v1::executeDrawOpcode(byte i) {
+	debugC(1, kDebugDrawOp, "opcodeDraw %d [0x%x] (%s)", i, i, getOpcodeDrawDesc(i));
+
+	OpcodeDrawProcV1 op = _opcodesDrawV1[i].proc;
+
+	if (op == NULL)
+		warning("unimplemented opcodeDraw: %d", i);
+	else
+		(this->*op) ();
+}
+
+bool Inter_v1::executeFuncOpcode(byte i, byte j, char &cmdCount, int16 &counter, int16 &retFlag) {
+	debugC(1, kDebugFuncOp, "opcodeFunc %d.%d [0x%x.0x%x] (%s)", i, j, i, j, getOpcodeFuncDesc(i, j));
+
+	if ((i > 4) || (j > 15)) {
+		warning("unimplemented opcodeFunc: %d.%d", i, j);
+		return false;
+	}
+
+	OpcodeFuncProcV1 op = _opcodesFuncV1[i*16 + j].proc;
+
+	if (op == NULL)
+		warning("unimplemented opcodeFunc: %d.%d", i, j);
+	else
+		return (this->*op) (cmdCount, counter, retFlag);
+	return false;
+}
+
+void Inter_v1::executeGoblinOpcode(int i, int16 &extraData, int32 *retVarPtr, Goblin::Gob_Object *objDesc) {
+	debugC(1, kDebugGobOp, "opcodeGoblin %d [0x%x] (%s)", i, i, getOpcodeGoblinDesc(i));
+
+	OpcodeGoblinProcV1 op = NULL;
+
+	for (int j = 0; j < ARRAYSIZE(_goblinFuncLookUp); j++)
+		if (_goblinFuncLookUp[j][0] == i) {
+			op = _opcodesGoblinV1[_goblinFuncLookUp[j][1]].proc;
+			break;
+		}
+
+	if (op == NULL) {
+		warning("unimplemented opcodeGoblin: %d", i);
+		_vm->_global->_inter_execPtr -= 2;
+		int16 cmd = load16();
+		_vm->_global->_inter_execPtr += cmd * 2;
+	}
+	else
+		(this->*op) (extraData, retVarPtr, objDesc);
+}
+
+const char *Inter_v1::getOpcodeDrawDesc(byte i) {
+	return _opcodesDrawV1[i].desc;
+}
+
+const char *Inter_v1::getOpcodeFuncDesc(byte i, byte j) {
+	if ((i > 4) || (j > 15))
+		return "";
+
+	return _opcodesFuncV1[i*16 + j].desc;
+}
+
+const char *Inter_v1::getOpcodeGoblinDesc(int i) {
+	for (int j = 0; j < ARRAYSIZE(_goblinFuncLookUp); j++)
+		if (_goblinFuncLookUp[j][0] == i)
+			return _opcodesGoblinV1[_goblinFuncLookUp[j][1]].desc;
+	return "";
+}
+
+void Inter_v1::checkSwitchTable(char **ppExec) {
+	int i;
+	int16 len;
+	int32 value;
+	bool found;
+	bool notFound;
+
+	found = false;
+	notFound = true;
+	*ppExec = 0;
+	value = VAR_OFFSET(_vm->_parse->parseVarIndex());
+
+	len = (int8) *_vm->_global->_inter_execPtr++;
+	while (len != -5) {
+		for (i = 0; i < len; i++) {
+			evalExpr(0);
+
+			if (_terminate)
+				return;
+
+			if (_vm->_global->_inter_resVal == value) {
+				found = true;
+				notFound = false;
+			}
+		}
+
+		if (found)
+			*ppExec = _vm->_global->_inter_execPtr;
+
+		_vm->_global->_inter_execPtr += READ_LE_UINT16(_vm->_global->_inter_execPtr + 2) + 2;
+		found = false;
+		len = (int8) *_vm->_global->_inter_execPtr++;
+	} 
+
+	if ((*_vm->_global->_inter_execPtr >> 4) != 4)
+		return;
+
+	_vm->_global->_inter_execPtr++;
+	if (notFound)
+		*ppExec = _vm->_global->_inter_execPtr;
+
+	_vm->_global->_inter_execPtr += READ_LE_UINT16(_vm->_global->_inter_execPtr + 2) + 2;
+}
+
 bool Inter_v1::o1_setMousePos(char &cmdCount, int16 &counter, int16 &retFlag) {
 	_vm->_global->_inter_mouseX = _vm->_parse->parseValExpr();
 	_vm->_global->_inter_mouseY = _vm->_parse->parseValExpr();
@@ -1303,6 +1414,7 @@ bool Inter_v1::o1_loadSpriteToPos(char &cmdCount, int16 &counter, int16 &retFlag
 		_vm->_draw->_destSurface = 101;
 	_vm->_draw->_transparency &= 1;
 	_vm->_global->_inter_execPtr += 2;
+
 	_vm->_draw->spriteOperation(DRAW_LOADSPRITE);
 
 	return false;
@@ -1696,73 +1808,6 @@ void Inter_v1::o1_freeFontToSprite(void) {
 	_vm->_draw->_fontToSprite[i].height = -1;
 }
 
-void Inter_v1::executeDrawOpcode(byte i) {
-	debugC(1, kDebugDrawOp, "opcodeDraw %d [0x%x] (%s)", i, i, getOpcodeDrawDesc(i));
-
-	OpcodeDrawProcV1 op = _opcodesDrawV1[i].proc;
-
-	if (op == NULL)
-		warning("unimplemented opcodeDraw: %d", i);
-	else
-		(this->*op) ();
-}
-
-bool Inter_v1::executeFuncOpcode(byte i, byte j, char &cmdCount, int16 &counter, int16 &retFlag) {
-	debugC(1, kDebugFuncOp, "opcodeFunc %d.%d [0x%x.0x%x] (%s)", i, j, i, j, getOpcodeFuncDesc(i, j));
-
-	if ((i > 4) || (j > 15)) {
-		warning("unimplemented opcodeFunc: %d.%d", i, j);
-		return false;
-	}
-
-	OpcodeFuncProcV1 op = _opcodesFuncV1[i*16 + j].proc;
-
-	if (op == NULL)
-		warning("unimplemented opcodeFunc: %d.%d", i, j);
-	else
-		return (this->*op) (cmdCount, counter, retFlag);
-	return false;
-}
-
-void Inter_v1::executeGoblinOpcode(int i, int16 &extraData, int32 *retVarPtr, Goblin::Gob_Object *objDesc) {
-	debugC(1, kDebugGobOp, "opcodeGoblin %d [0x%x] (%s)", i, i, getOpcodeGoblinDesc(i));
-
-	OpcodeGoblinProcV1 op = NULL;
-
-	for (int j = 0; j < ARRAYSIZE(_goblinFuncLookUp); j++)
-		if (_goblinFuncLookUp[j][0] == i) {
-			op = _opcodesGoblinV1[_goblinFuncLookUp[j][1]].proc;
-			break;
-		}
-
-	if (op == NULL) {
-		warning("unimplemented opcodeGoblin: %d", i);
-		_vm->_global->_inter_execPtr -= 2;
-		int16 cmd = load16();
-		_vm->_global->_inter_execPtr += cmd * 2;
-	}
-	else
-		(this->*op) (extraData, retVarPtr, objDesc);
-}
-
-const char *Inter_v1::getOpcodeDrawDesc(byte i) {
-	return _opcodesDrawV1[i].desc;
-}
-
-const char *Inter_v1::getOpcodeFuncDesc(byte i, byte j) {
-	if ((i > 4) || (j > 15))
-		return "";
-
-	return _opcodesFuncV1[i*16 + j].desc;
-}
-
-const char *Inter_v1::getOpcodeGoblinDesc(int i) {
-	for (int j = 0; j < ARRAYSIZE(_goblinFuncLookUp); j++)
-		if (_goblinFuncLookUp[j][0] == i)
-			return _opcodesGoblinV1[_goblinFuncLookUp[j][1]].desc;
-	return "";
-}
-
 bool Inter_v1::o1_callSub(char &cmdCount, int16 &counter, int16 &retFlag) {
 	char *storedIP = _vm->_global->_inter_execPtr;
 
diff --git a/engines/gob/inter_v2.cpp b/engines/gob/inter_v2.cpp
index a262680f8f..7df944c76c 100644
--- a/engines/gob/inter_v2.cpp
+++ b/engines/gob/inter_v2.cpp
@@ -715,6 +715,96 @@ const char *Inter_v2::getOpcodeGoblinDesc(int i) {
 	return "";
 }
 
+void Inter_v2::checkSwitchTable(char **ppExec) {
+	int i;
+	byte cmd;
+	int16 len;
+	int32 value;
+	bool found;
+
+	found = false;
+	*ppExec = 0;
+
+	cmd = *_vm->_global->_inter_execPtr;
+
+	value = _vm->_parse->parseVarIndex();
+
+	switch (cmd) {
+	case 16:
+	case 18:
+		value = (int8) READ_VARO_UINT8(value);
+		break;
+
+	case 23:
+	case 26:
+		value = READ_VARO_UINT32(value);
+		break;
+	
+	default:
+		value = READ_VARO_UINT16(value);
+		break;
+	}
+
+	if (_terminate)
+		return;
+
+	len = (int8) *_vm->_global->_inter_execPtr++;
+	while (len != -5) {
+		for (i = 0; i < len; i++) {
+			cmd = *_vm->_global->_inter_execPtr;
+
+			switch(cmd) {
+			case 19:
+				_vm->_global->_inter_execPtr++;
+				if (!found &&
+						(value == (int32) (READ_LE_UINT32(_vm->_global->_inter_execPtr))))
+					found = true;
+				_vm->_global->_inter_execPtr += 5;
+				break;
+
+			case 20:
+				_vm->_global->_inter_execPtr++;
+				if (!found &&
+						(value == (int16) (READ_LE_UINT16(_vm->_global->_inter_execPtr))))
+					found = true;
+				_vm->_global->_inter_execPtr += 3;
+				break;
+
+			case 21:
+				_vm->_global->_inter_execPtr++;
+				if (!found && (value == (int8) *_vm->_global->_inter_execPtr))
+					found = true;
+					_vm->_global->_inter_execPtr += 2;
+				break;
+
+			default:
+				if (!found) {
+					evalExpr(0);
+					if (value == _vm->_global->_inter_resVal)
+						found = true;
+				} else
+					_vm->_parse->skipExpr(99);
+				break;
+			}
+		}
+
+		if (found && (*ppExec == 0))
+			*ppExec = _vm->_global->_inter_execPtr;
+
+		_vm->_global->_inter_execPtr += READ_LE_UINT16(_vm->_global->_inter_execPtr + 2) + 2;
+		len = (int8) *_vm->_global->_inter_execPtr++;
+	}
+
+	if ((*_vm->_global->_inter_execPtr >> 4) != 4)
+		return;
+
+	_vm->_global->_inter_execPtr++;
+	if (*ppExec == 0)
+		*ppExec = _vm->_global->_inter_execPtr;
+
+	_vm->_global->_inter_execPtr += READ_LE_UINT16(_vm->_global->_inter_execPtr + 2) + 2;
+}
+
 void Inter_v2::o2_stub0x54(void) {
 	int16 index = _vm->_parse->parseValExpr();
 
@@ -879,7 +969,7 @@ int16 Inter_v2::loadSound(int16 search) {
 	} else {
 		if (id >= 30000) {
 			if (!isADL && (_vm->_game->_totFileData[0x29] >= 51)) { // loc_9763
-				if (_vm->_inter->_terminate != 0)
+				if (_terminate != 0)
 					return slot;
 				soundDesc = new Snd::SoundDesc;
 				extData = _vm->_game->loadExtData(id, 0, 0);
@@ -1869,7 +1959,7 @@ void Inter_v2::o2_initMult(void) {
 	if (_vm->_mult->_objects == 0) {
 		_vm->_mult->_renderData2 = new Mult::Mult_Object*[_vm->_mult->_objCount];
 		memset(_vm->_mult->_renderData2, 0, _vm->_mult->_objCount * sizeof(Mult::Mult_Object*));
-		if (_vm->_inter->_terminate)
+		if (_terminate)
 			return;
 		_vm->_mult->_orderArray = new int8[_vm->_mult->_objCount];
 		memset(_vm->_mult->_orderArray, 0, _vm->_mult->_objCount * sizeof(int8));
@@ -2115,15 +2205,15 @@ void Inter_v2::o2_playImd(void) {
 }
 
 void Inter_v2::o2_initScreen(void) {
-	int16 start;
+	int16 offY;
 	int16 videoMode;
 	int16 width;
 	int16 height;
 
-	start = load16();
+	offY = load16();
 
-	videoMode = start & 0xFF;
-	start = (start >> 8) & 0xFF;
+	videoMode = offY & 0xFF;
+	offY = (offY >> 8) & 0xFF;
 
 	width = _vm->_parse->parseValExpr();
 	height = _vm->_parse->parseValExpr();
@@ -2131,7 +2221,10 @@ void Inter_v2::o2_initScreen(void) {
 	if ((videoMode == _vm->_global->_videoMode) && (width == -1))
 		return;
 
-	_vm->_video->_surfWidth = videoMode == 0x14 ? 640 : 320;
+	if (width > 0)
+		_vm->_video->_surfWidth = width;
+	if (height > 0)
+		_vm->_video->_surfHeight = height;
 	
 	_vm->_draw->closeScreen();
 	_vm->_util->clearPalette();
@@ -2153,36 +2246,27 @@ void Inter_v2::o2_initScreen(void) {
 
 	_vm->_global->_setAllPalette = 1;
 
-	if ((width != -1) && (_vm->_global->_videoMode == 0x14)) {
+	if ((width != -1) && (_vm->_global->_videoMode == 0x14))
 		_vm->_game->_byte_2FC9B = 1;
-/*
-		if (width > 960)
-			width = 960;
-		_vm->_draw->_frontSurface->width = width;
-		_vm->_draw->_frontSurface->height = height;
-		warning("GOB2 Stub! _vid_setVirtRes(_vm->_draw->_frontSurface);");
-		_vm->_global->_mouseMaxCol = width;
-		_vm->_global->_mouseMaxRow = height;
-*/
-	}
 
 	_vm->_util->setMousePos(_vm->_global->_inter_mouseX, _vm->_global->_inter_mouseY);
 	_vm->_util->clearPalette();
 
-	if (start == 0)
+	// Split screen (word_2E51F ^= splitScreenHeight, off_2E51B ^= splitScreenSurf)?
+	if (offY == 0)
 		_vm->_draw->_word_2E51F = 0;
 	else
-		_vm->_draw->_word_2E51F = _vm->_global->_primaryHeight - start;
+		_vm->_draw->_word_2E51F = _vm->_global->_primaryHeight - offY;
 	_vm->_draw->initScreen();
 
-	if (_vm->_draw->_off_2E51B != 0) {
-		_vm->_video->_scrollOffset = 0;
+	_vm->_util->setScrollOffset();
 
 /*
-	warning("_vid_setSplit(%d)", _vm->_global->_primaryHeight - start);
-	warning("_vid_setPixelShift(0, %d", start);
-*/
+	if (_vm->_draw->_off_2E51B != 0) {
+		warning("_vid_setSplit(%d)", _vm->_global->_primaryHeight - offY);
+		warning("_vid_setPixelShift(0, %d", offY);
 	}
+*/
 }
 
 void Inter_v2::o2_setScrollOffset(void) {
@@ -2194,20 +2278,24 @@ void Inter_v2::o2_setScrollOffset(void) {
 		if (_vm->_game->_byte_2FC9B != 0)
 			_vm->_game->_byte_2FC9B = 1;
 		_vm->_parse->parseValExpr();
-		WRITE_VAR(2, _vm->_draw->_word_2FC9E);
-		WRITE_VAR(3, _vm->_draw->_word_2FC9C);
+		WRITE_VAR(2, _vm->_draw->_scrollOffsetX);
+		WRITE_VAR(3, _vm->_draw->_scrollOffsetY);
 	} else {
-		_vm->_draw->_word_2FC9E = offset;
-		_vm->_draw->_word_2FC9C = _vm->_parse->parseValExpr();
+		_vm->_draw->_scrollOffsetX = offset;
+		_vm->_draw->_scrollOffsetY = _vm->_parse->parseValExpr();
 	}
-	_vm->_util->setScrollOffset(_vm->_draw->_word_2FC9E);
+	if (_vm->_draw->_off_2E51B != 0)
+		_vm->_util->setScrollOffset(_vm->_draw->_scrollOffsetX,
+				_vm->_draw->_scrollOffsetY + 200 - _vm->_draw->_word_2E51F);
+	else
+		_vm->_util->setScrollOffset();
 	_noBusyWait = true;
 
 /*
 	if (_vm->_draw->_off_2E51B != 0)
-		warning("_vid_setPixelShift(%d, %d)", _vm->_draw->_word_2FC9E, _vm->_draw->_word_2FC9C + 200 - _vm->_draw->_word_2E51F);
+		warning("_vid_setPixelShift(%d, %d)", _vm->_draw->_scrollOffsetX, _vm->_draw->_scrollOffsetY + 200 - _vm->_draw->_word_2E51F);
 	else
-		warning("_vid_setPixelShift(%d, %d)", _vm->_draw->_word_2FC9E, _vm->_draw->_word_2FC9C);;
+		warning("_vid_setPixelShift(%d, %d)", _vm->_draw->_scrollOffsetX, _vm->_draw->_scrollOffsetY);;
 */
 }
 
@@ -2228,16 +2316,14 @@ void Inter_v2::o2_scroll(void) {
 	stepX = _vm->_parse->parseValExpr();
 	stepY = _vm->_parse->parseValExpr();
 
-	if ((stepY != 0) || (startY > 0) || (endY > 0))
-		warning("GOB2 Stub! Vertical scrolling / high surfaces");
-
 	curX = startX;
 	curY = startY;
 	while (!_vm->_quitRequested && ((curX != endX) || (curY != endY))) {
 		curX = stepX > 0 ? MIN(curX + stepX, (int) endX) : MAX(curX + stepX, (int) endX);
 		curY = stepY > 0 ? MIN(curY + stepY, (int) endY) : MAX(curY + stepY, (int) endY);
-		_vm->_draw->_word_2FC9E = curX;
-		_vm->_util->setScrollOffset(_vm->_draw->_word_2FC9E);
+		_vm->_draw->_scrollOffsetX = curX;
+		_vm->_draw->_scrollOffsetY = curY;
+		_vm->_util->setScrollOffset();
 	}
 }
 
diff --git a/engines/gob/mult_v2.cpp b/engines/gob/mult_v2.cpp
index 539b4fa41d..56f96f4d97 100644
--- a/engines/gob/mult_v2.cpp
+++ b/engines/gob/mult_v2.cpp
@@ -424,7 +424,7 @@ void Mult_v2::playMult(int16 startFrame, int16 endFrame, char checkEscape,
 			_vm->_anim->_areaTop = 0;
 			_vm->_anim->_areaLeft = 0;
 			_vm->_anim->_areaWidth = _vm->_video->_surfWidth;
-			_vm->_anim->_areaHeight = 200;
+			_vm->_anim->_areaHeight = _vm->_video->_surfHeight;
 			_objCount = 4;
 
 			if (_objects)
@@ -478,7 +478,7 @@ void Mult_v2::playMult(int16 startFrame, int16 endFrame, char checkEscape,
 			_vm->_draw->_spriteLeft = 0;
 			_vm->_draw->_spriteTop = 0;
 			_vm->_draw->_spriteRight = _vm->_video->_surfWidth;
-			_vm->_draw->_spriteBottom = 200;
+			_vm->_draw->_spriteBottom = _vm->_video->_surfHeight;
 			_vm->_draw->_transparency = 0;
 			_vm->_draw->spriteOperation(0);
 			_animDataAllocated = 1;
@@ -609,7 +609,7 @@ char Mult_v2::drawStatics(char stop) {
 		_vm->_draw->_spriteLeft = 0;
 		_vm->_draw->_spriteTop = 0;
 		_vm->_draw->_spriteRight = _vm->_video->_surfWidth;
-		_vm->_draw->_spriteBottom = 200;
+		_vm->_draw->_spriteBottom = _vm->_video->_surfHeight;
 		_vm->_draw->_transparency = 0;
 		_vm->_draw->spriteOperation(0);
 	}
diff --git a/engines/gob/util.cpp b/engines/gob/util.cpp
index 7698262e26..6dfa5b4d7c 100644
--- a/engines/gob/util.cpp
+++ b/engines/gob/util.cpp
@@ -494,9 +494,10 @@ void Util::forceMouseUp(void) {
 	_mouseButtons = 0;
 }
 
-void Util::setScrollOffset(int16 scrollOffset) {
+void Util::setScrollOffset(int16 x, int16 y) {
 	processInput();
-	_vm->_video->_scrollOffset = scrollOffset;
+	_vm->_video->_scrollOffsetX = x >= 0 ? x : _vm->_draw->_scrollOffsetX;
+	_vm->_video->_scrollOffsetY = y >= 0 ? y : _vm->_draw->_scrollOffsetY;
 	_vm->_video->waitRetrace(_vm->_global->_videoMode);
 }
 
diff --git a/engines/gob/util.h b/engines/gob/util.h
index 8f4d6867c6..de9e6224b9 100644
--- a/engines/gob/util.h
+++ b/engines/gob/util.h
@@ -84,7 +84,7 @@ public:
 	static void prepareStr(char *str);
 	void waitMouseRelease(char drawMouse);
 	void forceMouseUp(void);
-	void setScrollOffset(int16 scrollOffset);
+	void setScrollOffset(int16 x = -1, int16 y = -1);
 
 	static const char trStr1[];
 	static const char trStr2[];
diff --git a/engines/gob/video.cpp b/engines/gob/video.cpp
index 675d7a6f23..bbe909e189 100644
--- a/engines/gob/video.cpp
+++ b/engines/gob/video.cpp
@@ -38,7 +38,9 @@ namespace Gob {
 Video::Video(GobEngine *vm) : _vm(vm) {
 	_videoDriver = 0;
 	_surfWidth = 320;
-	_scrollOffset = 0;
+	_surfHeight = 200;
+	_scrollOffsetX = 0;
+	_scrollOffsetY = 0;
 }
 
 char Video::initDriver(int16 vidMode) {
@@ -396,7 +398,7 @@ void Video::initPrimary(int16 mode) {
 		Video::initDriver(mode);
 
 	if (mode != 3) {
-		initSurfDesc(mode, _surfWidth, 200, PRIMARY_SURFACE);
+		initSurfDesc(mode, _surfWidth, _vm->_video->_surfHeight, PRIMARY_SURFACE);
 
 		if (_vm->_global->_dontSetPalette)
 			return;
diff --git a/engines/gob/video.h b/engines/gob/video.h
index f59fa48191..99127e64bb 100644
--- a/engines/gob/video.h
+++ b/engines/gob/video.h
@@ -91,7 +91,9 @@ public:
 	};
 
 	int16 _surfWidth;
-	int16 _scrollOffset;
+	int16 _surfHeight;
+	int16 _scrollOffsetX;
+	int16 _scrollOffsetY;
 
 	Video(class GobEngine *vm);
 	virtual ~Video() {};
diff --git a/engines/gob/video_v2.cpp b/engines/gob/video_v2.cpp
index 2f71412b69..d4bbd7ada8 100644
--- a/engines/gob/video_v2.cpp
+++ b/engines/gob/video_v2.cpp
@@ -45,8 +45,9 @@ void Video_v2::waitRetrace(int16, bool mouse) {
 		CursorMan.showMouse((_vm->_draw->_showCursor & 2) != 0);
 	if (_vm->_draw->_frontSurface) {
 		time = _vm->_util->getTimeKey();
-		g_system->copyRectToScreen(_vm->_draw->_frontSurface->vidPtr + _scrollOffset,
-				_surfWidth, 0, 0, 320, 200);
+		g_system->copyRectToScreen(_vm->_draw->_frontSurface->vidPtr +
+				_scrollOffsetY * _surfWidth + _scrollOffsetX, _surfWidth,
+				0, 0, 320, 200);
 		g_system->updateScreen();
 		_vm->_util->delay(MAX(1, 10 - (int)(_vm->_util->getTimeKey() - time)));
 	}
@@ -136,8 +137,8 @@ Video::SurfaceDesc *Video_v2::initSurfDesc(int16 vidMode, int16 width, int16 hei
 		assert(descPtr);
 		if (descPtr->vidPtr != 0)
 			delete[] descPtr->vidPtr;
-		vidMem = new byte[_surfWidth * 200];
-		memset(vidMem, 0, _surfWidth * 200);
+		vidMem = new byte[_surfWidth * _surfHeight];
+		memset(vidMem, 0, _surfWidth * _surfHeight);
 	} else {
 		if (flags & DISABLE_SPR_ALLOC) {
 			descPtr = new SurfaceDesc;