MADS: Transformed ImageInterEntries to be User Interface UISlots

16 files changed, 383 insertions, 330 deletions

diff --git a/engines/mads/animation.cpp b/engines/mads/animation.cpp
index 783611e3da..b0b69b946a 100644
--- a/engines/mads/animation.cpp
+++ b/engines/mads/animation.cpp
@@ -403,7 +403,7 @@ void Animation::update() {
 
 	for (uint idx = 0; idx < scene._spriteSlots.size(); ++idx) {
 		if (scene._spriteSlots[idx]._seqIndex >= 0x80)
-			scene._spriteSlots[idx]._spriteType = ST_EXPIRED;
+			scene._spriteSlots[idx]._SlotType = ST_EXPIRED;
 	}
 
 	// Validate the current frame
@@ -445,7 +445,7 @@ void Animation::update() {
 	if (paChanged) {
 		newIndex = scene._spriteSlots.add();
 		scene._spriteSlots[newIndex]._seqIndex = -1;
-		scene._spriteSlots[newIndex]._spriteType = ST_FULL_SCREEN_REFRESH;
+		scene._spriteSlots[newIndex]._SlotType = ST_FULL_SCREEN_REFRESH;
 	}
 
 	// Main frame animation loop - frames get animated by being placed, as necessary, into the
@@ -463,7 +463,7 @@ void Animation::update() {
 					int seqIndex = _frameEntries[_oldFrameEntry]._seqIndex - scene._spriteSlots[index]._seqIndex;
 					if (seqIndex == 0x80) {
 						if (scene._spriteSlots[index] == _frameEntries[_oldFrameEntry]._spriteSlot) {
-							scene._spriteSlots[index]._spriteType = ST_NONE;
+							scene._spriteSlots[index]._SlotType = ST_NONE;
 							spriteSlotIndex = -1;
 						}
 					}
@@ -479,7 +479,7 @@ void Animation::update() {
 
 					SpriteAsset &spriteSet = *scene._sprites[
 						scene._spriteSlots[slotIndex]._spritesIndex];
-					slot._spriteType = spriteSet.isBackground() ? ST_BACKGROUND : ST_FOREGROUND;
+					slot._SlotType = spriteSet.isBackground() ? ST_BACKGROUND : ST_FOREGROUND;
 				}
 				break;
 			}
diff --git a/engines/mads/game.cpp b/engines/mads/game.cpp
index 3778e834ed..e65330a5d4 100644
--- a/engines/mads/game.cpp
+++ b/engines/mads/game.cpp
@@ -235,7 +235,12 @@ void Game::sectionLoop() {
 		_player._priorTimer = _scene._frameStartTime + _player._ticksAmount;
 		_player.idle();
 
-		warning("TODO: _selectedObject IF block");
+		if (_scene._userInterface._selectedInvIndex >= 0) {
+			_scene._userInterface.loadInventoryAnim(
+				_objects._inventoryList[_scene._userInterface._selectedInvIndex]);
+		} else {
+			_scene._userInterface.noInventoryAnim();
+		}
 
 		_v1 = 5;
 		_scene._roomChanged = false;
diff --git a/engines/mads/nebular/nebular_scenes2.cpp b/engines/mads/nebular/nebular_scenes2.cpp
index d3284cc649..63c03dc5c8 100644
--- a/engines/mads/nebular/nebular_scenes2.cpp
+++ b/engines/mads/nebular/nebular_scenes2.cpp
@@ -197,7 +197,7 @@ void Scene201::enter() {
 		_scene->_sequences.addSubEntry(_globals._spriteIndexes[21], SM_FRAME_INDEX, 12, 70);
 		_scene->_sequences.setDepth(_globals._spriteIndexes[21], 1);
 		_globals._frameTime = 0;
-		_game._player.sub7E53C(Common::Point(157, 143), 8);
+		_game._player.startWalking(Common::Point(157, 143), 8);
 		_vm->_palette->setEntry(252, 45, 63, 45);
 		_vm->_palette->setEntry(253, 20, 45, 20);
 		_scene->_kernelMessages.add(Common::Point(0, 0), 0x1110, 2, 0, 120, _game.getQuote(90));
diff --git a/engines/mads/player.cpp b/engines/mads/player.cpp
index 44dfc88ede..80343609b9 100644
--- a/engines/mads/player.cpp
+++ b/engines/mads/player.cpp
@@ -246,7 +246,7 @@ void Player::update() {
 	if (_forceRefresh || (_visible != _priorVisible)) {
 		int slotIndex = getSpriteSlot();
 		if (slotIndex >= 0)
-			scene._spriteSlots[slotIndex]._spriteType = ST_EXPIRED;
+			scene._spriteSlots[slotIndex]._SlotType = ST_EXPIRED;
 
 		int newDepth = 1;
 		int yp = MAX(_playerPos.y, (int16)(MADS_SCENE_HEIGHT - 1));
@@ -264,7 +264,7 @@ void Player::update() {
 		if (_visible) {
 			// Player sprite needs to be rendered
 			SpriteSlot slot;
-			slot._spriteType = ST_FOREGROUND;
+			slot._SlotType = ST_FOREGROUND;
 			slot._seqIndex = PLAYER_SEQ_INDEX;
 			slot._spritesIndex = _spritesStart + _spritesIdx;
 			slot._frameNumber = _frameOffset + _frameNum;
@@ -285,7 +285,7 @@ void Player::update() {
 
 				if (equal)
 					// Undo the prior expiry of the player sprite
-					s2._spriteType = ST_NONE;
+					s2._SlotType = ST_NONE;
 				else
 					slotIndex = -1;
 			}
@@ -359,6 +359,16 @@ void Player::setDest(const Common::Point &pt, int facing) {
 	}
 }
 
+void Player::startWalking(const Common::Point &pos, int direction) {
+	Scene &scene = _vm->_game->_scene;
+
+	reset();
+	scene._action._startWalkFlag = true;
+	scene._action._walkFlag = true;
+	scene._destPos = pos;
+	scene._destFacing = direction;
+}
+
 void Player::nextFrame() {
 	Scene &scene = _vm->_game->_scene;
 
@@ -528,7 +538,7 @@ int Player::getSpriteSlot() {
 
 	for (uint idx = 0; idx < spriteSlots.size(); ++idx) {
 		if (spriteSlots[idx]._seqIndex == PLAYER_SEQ_INDEX && 
-				spriteSlots[idx]._spriteType >= ST_NONE)
+				spriteSlots[idx]._SlotType >= ST_NONE)
 			return idx;
 	}
 
@@ -737,13 +747,4 @@ void Player::startMovement() {
 	_v8452E = -_v84530;
 }
 
-void Player::sub7E53C(Common::Point pos, int direction) {
-	Scene &scene = _vm->_game->_scene;
-
-	reset();
-	scene._action._startWalkFlag = true;
-	scene._action._walkFlag = true;
-	scene._destPos = pos;
-	scene._destFacing = direction;
-}
 } // End of namespace MADS
diff --git a/engines/mads/player.h b/engines/mads/player.h
index ed44de2c20..e330c650de 100644
--- a/engines/mads/player.h
+++ b/engines/mads/player.h
@@ -152,9 +152,9 @@ public:
 
 	void setDest(const Common::Point &pt, int facing);
 
-	void nextFrame();
+	void startWalking(const Common::Point &pos, int direction);
 
-	void sub7E53C(Common::Point pos, int direction);
+	void nextFrame();
 };
 
 } // End of namespace MADS
diff --git a/engines/mads/scene.cpp b/engines/mads/scene.cpp
index 88533a9ffd..ed5fca5f6e 100644
--- a/engines/mads/scene.cpp
+++ b/engines/mads/scene.cpp
@@ -379,7 +379,7 @@ void Scene::doFrame() {
 				_kernelMessages.update();
 			}
 
-			_imageInterEntries.call(_vm->_game->_abortTimers2 == kTransitionFadeIn ? 0xff : 0,
+			_userInterface._uiSlots.call(_vm->_game->_abortTimers2 == kTransitionFadeIn ? 0xff : 0,
 				_vm->_game->_abortTimers2);
 
 			// Write any text needed by the interface
diff --git a/engines/mads/scene.h b/engines/mads/scene.h
index 3a94754dd2..f5163bb43d 100644
--- a/engines/mads/scene.h
+++ b/engines/mads/scene.h
@@ -90,7 +90,6 @@ public:
 	int _textSpacing;
 	Hotspots _hotspots;
 	ScreenObjects _screenObjects;
-	ImageInterEntries _imageInterEntries;
 	DirtyAreas _dirtyAreas;
 	int _v1;
 	SceneInfo *_sceneInfo;
diff --git a/engines/mads/scene_data.cpp b/engines/mads/scene_data.cpp
index c37f0b1f74..8980bd4428 100644
--- a/engines/mads/scene_data.cpp
+++ b/engines/mads/scene_data.cpp
@@ -136,173 +136,11 @@ void ScreenObjects::proc1() {
 
 /*------------------------------------------------------------------------*/
 
-MADSEngine *DirtyArea::_vm = nullptr;
-
-DirtyArea::DirtyArea() {
-	_active = false;
-	_textActive = false;
-}
-
-void DirtyArea::setArea(int width, int height, int maxWidth, int maxHeight) {
-	if (_bounds.left % 2) {
-		--_bounds.left;
-		++width;
-	}
-
-	if (_bounds.left < 0)
-		_bounds.left = 0;
-	else if (_bounds.left > maxWidth)
-		_bounds.left = maxWidth;
-	int right = _bounds.left + width;
-	if (right < 0)
-		right = 0;
-	if (right > maxWidth)
-		right = maxWidth;
-
-	_bounds.right = right;
-	_bounds2.left = _bounds.width() / 2;
-	_bounds2.right = _bounds.left + (_bounds.width() + 1) / 2 - 1;
-
-	if (_bounds.top < 0)
-		_bounds.top = 0;
-	else if (_bounds.top > maxHeight)
-		_bounds.top = maxHeight;
-	int bottom = _bounds.top + height;
-	if (bottom < 0)
-		bottom = 0;
-	if (bottom > maxHeight)
-		bottom = maxHeight;
-
-	_bounds.bottom = bottom;
-	_bounds2.top = _bounds.height() / 2;
-	_bounds2.bottom = _bounds.top + (_bounds.height() + 1) / 2 - 1;
-
-	_active = true;
-}
-
-
-void DirtyArea::setSpriteSlot(const SpriteSlot *spriteSlot) {
-	int width, height;
-	Scene &scene = _vm->_game->_scene;
-
-	if (spriteSlot->_spriteType == ST_FULL_SCREEN_REFRESH) {
-		// Special entry to refresh the entire screen
-		_bounds.left = 0;
-		_bounds.top = 0;
-		width = MADS_SCREEN_WIDTH;
-		height = MADS_SCENE_HEIGHT;
-	} else {
-		// Standard sprite slots
-		_bounds.left = spriteSlot->_position.x - scene._posAdjust.x;
-		_bounds.top = spriteSlot->_position.y - scene._posAdjust.y;
-
-		SpriteAsset &spriteSet = *scene._sprites[spriteSlot->_spritesIndex];
-		MSprite *frame = spriteSet.getFrame(((spriteSlot->_frameNumber & 0x7fff) - 1) & 0x7f);
-
-		if (spriteSlot->_scale == -1) {
-			width = frame->w;
-			height = frame->h;
-		} else {
-			width = frame->w * spriteSlot->_scale / 100;
-			height = frame->h * spriteSlot->_scale / 100;
-
-			_bounds.left -= width / 2;
-			_bounds.top += -(height - 1);
-		}
-	}
-
-	setArea(width, height, MADS_SCREEN_WIDTH, MADS_SCENE_HEIGHT);
-}
-
-void DirtyArea::setTextDisplay(const TextDisplay *textDisplay) {
-	_bounds.left = textDisplay->_bounds.left;
-	_bounds.top = textDisplay->_bounds.top;
-
-	setArea(textDisplay->_bounds.width(), textDisplay->_bounds.height(),
-		MADS_SCREEN_WIDTH, MADS_SCENE_HEIGHT);
-}
-
-/*------------------------------------------------------------------------*/
-
-DirtyAreas::DirtyAreas(MADSEngine *vm) : _vm(vm) {
-	DirtyArea::_vm = vm;
-
-	for (int i = 0; i < DIRTY_AREAS_SIZE; ++i) {
-		DirtyArea rec;
-		rec._active = false;
-		push_back(rec);
-	}
-}
-
-void DirtyAreas::merge(int startIndex, int count) {
-	if (startIndex >= count)
-		return;
-
-	for (int outerCtr = startIndex - 1, idx = 0; idx < count; ++outerCtr, ++idx) {
-		if (!(*this)[outerCtr]._active)
-			continue;
-
-		for (int innerCtr = outerCtr + 1; innerCtr < count; ++innerCtr) {
-			if (!(*this)[innerCtr]._active || !intersects(outerCtr, innerCtr))
-				continue;
-
-			if ((*this)[outerCtr]._textActive && (*this)[innerCtr]._textActive)
-				mergeAreas(outerCtr, innerCtr);
-		}
-	}
-}
-
-/**
-* Returns true if two dirty areas intersect
-*/
-bool DirtyAreas::intersects(int idx1, int idx2) {
-	return (*this)[idx1]._bounds2.intersects((*this)[idx2]._bounds2);
-}
-
-void DirtyAreas::mergeAreas(int idx1, int idx2) {
-	DirtyArea &da1 = (*this)[idx1];
-	DirtyArea &da2 = (*this)[idx2];
-
-	da1._bounds.extend(da2._bounds);
-
-	da1._bounds2.left = da1._bounds.width() / 2;
-	da1._bounds2.right = da1._bounds.left + (da1._bounds.width() + 1) / 2 - 1;
-	da1._bounds2.top = da1._bounds.height() / 2;
-	da1._bounds2.bottom = da1._bounds.top + (da1._bounds.height() + 1) / 2 - 1;
-
-	da2._active = false;
-	da1._textActive = true;
-}
-
-void DirtyAreas::copy(MSurface *srcSurface, MSurface *destSurface, const Common::Point &posAdjust) {
-	for (uint i = 0; i < size(); ++i) {
-		const Common::Rect &srcBounds = (*this)[i]._bounds;
-
-		Common::Rect bounds(srcBounds.left + posAdjust.x, srcBounds.top + posAdjust.y,
-			srcBounds.right + posAdjust.x, srcBounds.bottom + posAdjust.y);
-
-		if ((*this)[i]._active && bounds.isValidRect()) {
-			srcSurface->copyTo(destSurface, bounds, Common::Point(bounds.left, bounds.top));
-		}
-	}
-}
-
-void DirtyAreas::copyToScreen(const Common::Point &posAdjust) {
-	for (uint i = 0; i < size(); ++i) {
-		const Common::Rect &srcBounds = (*this)[i]._bounds;
-
-		Common::Rect bounds(srcBounds.left + posAdjust.x, srcBounds.top + posAdjust.y,
-			srcBounds.right + posAdjust.x, srcBounds.bottom + posAdjust.y);
-
-		if ((*this)[i]._active && (*this)[i]._bounds.isValidRect()) {
-			_vm->_screen.copyRectToScreen(bounds);
-		}
-	}
-}
-
-void DirtyAreas::reset() {
-	for (uint i = 0; i < size(); ++i)
-		(*this)[i]._active = false;
+void SceneNode::load(Common::SeekableReadStream *f) {
+	_walkPos.x = f->readSint16LE();
+	_walkPos.y = f->readSint16LE();
+	for (int i = 0; i < MAX_ROUTE_NODES; ++i)
+		_indexes[i] = f->readUint16LE();
 }
 
 /*------------------------------------------------------------------------*/
diff --git a/engines/mads/scene_data.h b/engines/mads/scene_data.h
index f2893c5fe1..1543669f7f 100644
--- a/engines/mads/scene_data.h
+++ b/engines/mads/scene_data.h
@@ -108,61 +108,6 @@ public:
 	void check(bool scanFlag);
 };
 
-class DirtyArea {
-private:
-	static MADSEngine *_vm;
-	friend class DirtyAreas;
-public:
-	Common::Rect _bounds;
-	Common::Rect _bounds2;
-	bool _textActive;
-	bool _active;
-
-	DirtyArea();
-
-	void setArea(int width, int height, int maxWidth, int maxHeight);
-
-	void setSpriteSlot(const SpriteSlot *spriteSlot);
-
-	/**
-	* Set up a dirty area for a text display
-	*/
-	void setTextDisplay(const TextDisplay *textDisplay);
-};
-
-class DirtyAreas: public Common::Array<DirtyArea> {
-private:
-	MADSEngine *_vm;
-public:
-	DirtyAreas(MADSEngine *vm);
-	
-	/**
-	* Merge together any designated dirty areas that overlap
-	* @param startIndex	1-based starting dirty area starting index
-	* @param count			Number of entries to process
-	*/
-	void merge(int startIndex, int count);
-
-	bool intersects(int idx1, int idx2);
-	void mergeAreas(int idx1, int idx2);
-
-	/**
-	 * Copy the data specified by the dirty rect list between surfaces
-	 * @param srcSurface	Source surface
-	 * @param destSurface	Dest surface
-	 * @param posAdjust		Position adjustment
-	 */
-	void copy(MSurface *srcSurface, MSurface *destSurface, const Common::Point &posAdjust);
-
-	/**
-	 * Use the lsit of dirty areas to copy areas of the screen surface to
-	 * the physical screen
-	 * @param posAdjust		Position adjustment	 */
-	void copyToScreen(const Common::Point &posAdjust);
-
-	void reset();
-};
-
 class SceneLogic {
 protected:
 	MADSEngine *_vm;
diff --git a/engines/mads/screen.cpp b/engines/mads/screen.cpp
index 20ff4f6df2..e760aa465d 100644
--- a/engines/mads/screen.cpp
+++ b/engines/mads/screen.cpp
@@ -28,6 +28,179 @@
 
 namespace MADS {
 
+MADSEngine *DirtyArea::_vm = nullptr;
+
+DirtyArea::DirtyArea() {
+	_active = false;
+	_textActive = false;
+}
+
+void DirtyArea::setArea(int width, int height, int maxWidth, int maxHeight) {
+	if (_bounds.left % 2) {
+		--_bounds.left;
+		++width;
+	}
+
+	if (_bounds.left < 0)
+		_bounds.left = 0;
+	else if (_bounds.left > maxWidth)
+		_bounds.left = maxWidth;
+	int right = _bounds.left + width;
+	if (right < 0)
+		right = 0;
+	if (right > maxWidth)
+		right = maxWidth;
+
+	_bounds.right = right;
+	_bounds2.left = _bounds.width() / 2;
+	_bounds2.right = _bounds.left + (_bounds.width() + 1) / 2 - 1;
+
+	if (_bounds.top < 0)
+		_bounds.top = 0;
+	else if (_bounds.top > maxHeight)
+		_bounds.top = maxHeight;
+	int bottom = _bounds.top + height;
+	if (bottom < 0)
+		bottom = 0;
+	if (bottom > maxHeight)
+		bottom = maxHeight;
+
+	_bounds.bottom = bottom;
+	_bounds2.top = _bounds.height() / 2;
+	_bounds2.bottom = _bounds.top + (_bounds.height() + 1) / 2 - 1;
+
+	_active = true;
+}
+
+
+void DirtyArea::setSpriteSlot(const SpriteSlot *spriteSlot) {
+	int width, height;
+	Scene &scene = _vm->_game->_scene;
+
+	if (spriteSlot->_SlotType == ST_FULL_SCREEN_REFRESH) {
+		// Special entry to refresh the entire screen
+		_bounds.left = 0;
+		_bounds.top = 0;
+		width = MADS_SCREEN_WIDTH;
+		height = MADS_SCENE_HEIGHT;
+	}
+	else {
+		// Standard sprite slots
+		_bounds.left = spriteSlot->_position.x - scene._posAdjust.x;
+		_bounds.top = spriteSlot->_position.y - scene._posAdjust.y;
+
+		SpriteAsset &spriteSet = *scene._sprites[spriteSlot->_spritesIndex];
+		MSprite *frame = spriteSet.getFrame(((spriteSlot->_frameNumber & 0x7fff) - 1) & 0x7f);
+
+		if (spriteSlot->_scale == -1) {
+			width = frame->w;
+			height = frame->h;
+		}
+		else {
+			width = frame->w * spriteSlot->_scale / 100;
+			height = frame->h * spriteSlot->_scale / 100;
+
+			_bounds.left -= width / 2;
+			_bounds.top += -(height - 1);
+		}
+	}
+
+	setArea(width, height, MADS_SCREEN_WIDTH, MADS_SCENE_HEIGHT);
+}
+
+void DirtyArea::setTextDisplay(const TextDisplay *textDisplay) {
+	_bounds.left = textDisplay->_bounds.left;
+	_bounds.top = textDisplay->_bounds.top;
+
+	setArea(textDisplay->_bounds.width(), textDisplay->_bounds.height(),
+		MADS_SCREEN_WIDTH, MADS_SCENE_HEIGHT);
+}
+
+/*------------------------------------------------------------------------*/
+
+DirtyAreas::DirtyAreas(MADSEngine *vm) : _vm(vm) {
+	DirtyArea::_vm = vm;
+
+	for (int i = 0; i < DIRTY_AREAS_SIZE; ++i) {
+		DirtyArea rec;
+		rec._active = false;
+		push_back(rec);
+	}
+}
+
+void DirtyAreas::merge(int startIndex, int count) {
+	if (startIndex >= count)
+		return;
+
+	for (int outerCtr = startIndex - 1, idx = 0; idx < count; ++outerCtr, ++idx) {
+		if (!(*this)[outerCtr]._active)
+			continue;
+
+		for (int innerCtr = outerCtr + 1; innerCtr < count; ++innerCtr) {
+			if (!(*this)[innerCtr]._active || !intersects(outerCtr, innerCtr))
+				continue;
+
+			if ((*this)[outerCtr]._textActive && (*this)[innerCtr]._textActive)
+				mergeAreas(outerCtr, innerCtr);
+		}
+	}
+}
+
+/**
+* Returns true if two dirty areas intersect
+*/
+bool DirtyAreas::intersects(int idx1, int idx2) {
+	return (*this)[idx1]._bounds2.intersects((*this)[idx2]._bounds2);
+}
+
+void DirtyAreas::mergeAreas(int idx1, int idx2) {
+	DirtyArea &da1 = (*this)[idx1];
+	DirtyArea &da2 = (*this)[idx2];
+
+	da1._bounds.extend(da2._bounds);
+
+	da1._bounds2.left = da1._bounds.width() / 2;
+	da1._bounds2.right = da1._bounds.left + (da1._bounds.width() + 1) / 2 - 1;
+	da1._bounds2.top = da1._bounds.height() / 2;
+	da1._bounds2.bottom = da1._bounds.top + (da1._bounds.height() + 1) / 2 - 1;
+
+	da2._active = false;
+	da1._textActive = true;
+}
+
+void DirtyAreas::copy(MSurface *srcSurface, MSurface *destSurface, const Common::Point &posAdjust) {
+	for (uint i = 0; i < size(); ++i) {
+		const Common::Rect &srcBounds = (*this)[i]._bounds;
+
+		Common::Rect bounds(srcBounds.left + posAdjust.x, srcBounds.top + posAdjust.y,
+			srcBounds.right + posAdjust.x, srcBounds.bottom + posAdjust.y);
+
+		if ((*this)[i]._active && bounds.isValidRect()) {
+			srcSurface->copyTo(destSurface, bounds, Common::Point(bounds.left, bounds.top));
+		}
+	}
+}
+
+void DirtyAreas::copyToScreen(const Common::Point &posAdjust) {
+	for (uint i = 0; i < size(); ++i) {
+		const Common::Rect &srcBounds = (*this)[i]._bounds;
+
+		Common::Rect bounds(srcBounds.left + posAdjust.x, srcBounds.top + posAdjust.y,
+			srcBounds.right + posAdjust.x, srcBounds.bottom + posAdjust.y);
+
+		if ((*this)[i]._active && (*this)[i]._bounds.isValidRect()) {
+			_vm->_screen.copyRectToScreen(bounds);
+		}
+	}
+}
+
+void DirtyAreas::reset() {
+	for (uint i = 0; i < size(); ++i)
+		(*this)[i]._active = false;
+}
+
+/*------------------------------------------------------------------------*/
+
 ScreenSurface::ScreenSurface() {
 	_dataP = nullptr;
 }
diff --git a/engines/mads/screen.h b/engines/mads/screen.h
index e101020fc8..2860462ff1 100644
--- a/engines/mads/screen.h
+++ b/engines/mads/screen.h
@@ -45,6 +45,64 @@ enum ScreenTransition {
 	kVertTransition7, kCenterVertTransition
 };
 
+class SpriteSlot;
+class TextDisplay;
+
+class DirtyArea {
+private:
+	static MADSEngine *_vm;
+	friend class DirtyAreas;
+public:
+	Common::Rect _bounds;
+	Common::Rect _bounds2;
+	bool _textActive;
+	bool _active;
+
+	DirtyArea();
+
+	void setArea(int width, int height, int maxWidth, int maxHeight);
+
+	void setSpriteSlot(const SpriteSlot *spriteSlot);
+
+	/**
+	* Set up a dirty area for a text display
+	*/
+	void setTextDisplay(const TextDisplay *textDisplay);
+};
+
+class DirtyAreas : public Common::Array<DirtyArea> {
+private:
+	MADSEngine *_vm;
+public:
+	DirtyAreas(MADSEngine *vm);
+
+	/**
+	* Merge together any designated dirty areas that overlap
+	* @param startIndex	1-based starting dirty area starting index
+	* @param count			Number of entries to process
+	*/
+	void merge(int startIndex, int count);
+
+	bool intersects(int idx1, int idx2);
+	void mergeAreas(int idx1, int idx2);
+
+	/**
+	* Copy the data specified by the dirty rect list between surfaces
+	* @param srcSurface	Source surface
+	* @param destSurface	Dest surface
+	* @param posAdjust		Position adjustment
+	*/
+	void copy(MSurface *srcSurface, MSurface *destSurface, const Common::Point &posAdjust);
+
+	/**
+	* Use the lsit of dirty areas to copy areas of the screen surface to
+	* the physical screen
+	* @param posAdjust		Position adjustment	 */
+	void copyToScreen(const Common::Point &posAdjust);
+
+	void reset();
+};
+
 class ScreenSurface : public MSurface {
 private:
 	/**
diff --git a/engines/mads/sequence.cpp b/engines/mads/sequence.cpp
index 6418a03477..684e4996bc 100644
--- a/engines/mads/sequence.cpp
+++ b/engines/mads/sequence.cpp
@@ -178,7 +178,7 @@ void SequenceList::setSpriteSlot(int seqIndex, SpriteSlot &spriteSlot) {
 	SequenceEntry &timerEntry = _entries[seqIndex];
 	SpriteAsset &spriteSet = *scene._sprites[timerEntry._spritesIndex];
 
-	spriteSlot._spriteType = spriteSet.isBackground() ? ST_BACKGROUND : ST_FOREGROUND;
+	spriteSlot._SlotType = spriteSet.isBackground() ? ST_BACKGROUND : ST_FOREGROUND;
 	spriteSlot._seqIndex = seqIndex;
 	spriteSlot._spritesIndex = timerEntry._spritesIndex;
 	spriteSlot._frameNumber = (timerEntry._flipped ? 0x8000 : 0) | timerEntry._frameIndex;
diff --git a/engines/mads/sprites.cpp b/engines/mads/sprites.cpp
index be066ba2db..18f6a642fd 100644
--- a/engines/mads/sprites.cpp
+++ b/engines/mads/sprites.cpp
@@ -139,7 +139,7 @@ byte MSprite::getTransparencyIndex() const {
 MADSEngine *SpriteSlot::_vm = nullptr;
 
 SpriteSlot::SpriteSlot() {
-	_spriteType = ST_NONE;
+	_SlotType = ST_NONE;
 	_seqIndex = 0;
 	_spritesIndex = 0;
 	_frameNumber = 0;
@@ -147,8 +147,8 @@ SpriteSlot::SpriteSlot() {
 	_scale = 0;
 }
 
-SpriteSlot::SpriteSlot(SpriteType type, int seqIndex) {
-	_spriteType = type;
+SpriteSlot::SpriteSlot(SlotType type, int seqIndex) {
+	_SlotType = type;
 	_seqIndex = seqIndex;
 	_spritesIndex = 0;
 	_frameNumber = 0;
@@ -208,11 +208,11 @@ void SpriteSlots::setDirtyAreas() {
 	Scene &scene = _vm->_game->_scene;
 
 	for (uint i = 0; i < size(); ++i) {
-		if ((*this)[i]._spriteType >= ST_NONE) {
+		if ((*this)[i]._SlotType >= ST_NONE) {
 			scene._dirtyAreas[i].setSpriteSlot(&(*this)[i]);
 
-			scene._dirtyAreas[i]._textActive = ((*this)[i]._spriteType <= ST_NONE) ? 0 : 1;
-			(*this)[i]._spriteType = ST_NONE;
+			scene._dirtyAreas[i]._textActive = ((*this)[i]._SlotType <= ST_NONE) ? 0 : 1;
+			(*this)[i]._SlotType = ST_NONE;
 		}
 	}
 }
@@ -247,14 +247,14 @@ void SpriteSlots::drawBackground() {
 		SpriteSlot &spriteSlot = (*this)[i];
 		DirtyArea &dirtyArea = scene._dirtyAreas[i];
 
-		if (spriteSlot._spriteType >= ST_NONE) {
+		if (spriteSlot._SlotType >= ST_NONE) {
 			// Foreground sprite, so we can ignore it
 			dirtyArea._active = false;
 		} else {
 			dirtyArea._active = true;
 			dirtyArea.setSpriteSlot(&spriteSlot);
 
-			if (spriteSlot._spriteType == ST_BACKGROUND) {
+			if (spriteSlot._SlotType == ST_BACKGROUND) {
 				// Background object, so need to draw it
 				assert(spriteSlot._frameNumber > 0);
 				SpriteAsset *asset = scene._sprites[spriteSlot._spritesIndex];
@@ -304,7 +304,7 @@ void SpriteSlots::drawForeground(MSurface *s) {
 	// Get a list of sprite object depths for active objects
 	for (uint i = 0; i < size(); ++i) {
 		SpriteSlot &spriteSlot = (*this)[i];
-		if (spriteSlot._spriteType >= ST_NONE) {
+		if (spriteSlot._SlotType >= ST_NONE) {
 			DepthEntry rec(16 - spriteSlot._depth, i);
 			depthList.push_back(rec);
 		}
@@ -367,7 +367,7 @@ void SpriteSlots::drawForeground(MSurface *s) {
 
 void SpriteSlots::cleanUp() {
 	for (int i = (int)size() - 1; i >= 0; --i) {
-		if ((*this)[i]._spriteType < ST_NONE)
+		if ((*this)[i]._SlotType < ST_NONE)
 			remove_at(i);
 	}
 }
@@ -391,6 +391,7 @@ int SpriteSets::add(SpriteAsset *asset, int idx) {
 }
 
 int SpriteSets::addSprites(const Common::String &resName, int flags) {
+	++_assetCount;
 	return add(new SpriteAsset(_vm, resName, flags));
 }
 
@@ -398,52 +399,17 @@ void SpriteSets::clear() {
 	for (uint i = 0; i < size(); ++i)
 		delete (*this)[i];
 
+	_assetCount = 0;
 	Common::Array<SpriteAsset *>::clear();
 }
 
-/*------------------------------------------------------------------------*/
-
-ImageInterEntry::ImageInterEntry() {
-	_field0 = 0;
-	_field2 = 0;
-	_field3 = 0;
-	_field4 = 0;
-	_field6 = 0;
-	_field8 = 0;
-}
-
-/*------------------------------------------------------------------------*/
-
-void ImageInterEntries::add(int v1, int v2) {
-	ImageInterEntry ie;
-	ie._field0 = -2;
-	ie._field2 = -1;
-
-	push_back(ie);
-}
+void SpriteSets::remove(int idx) {
+	if (idx >= 0) {
+		delete (*this)[idx];
+		(*this)[idx] = nullptr;
 
-void ImageInterEntries::add(int v1, int v2, int v3, int v4) {
-	assert(size() < 50);
-
-	ImageInterEntry ie;
-	ie._field0 = -3;
-	ie._field2 = 201;
-	ie._field6 = v1;
-	ie._field8 = v2;
-	ie._field4 = v3;
-	ie._field3 = v4;
-
-	push_back(ie);
-}
-
-ImageInterEntry &ImageInterEntries::add() {
-	resize(size() + 1);
-	return (*this)[size() - 1];
-}
-
-
-void ImageInterEntries::call(int v1, int v2) {
-	debug("TODO: ImageInterEntries::call");
+		--_assetCount;
+	}
 }
 
 } // End of namespace MADS
diff --git a/engines/mads/sprites.h b/engines/mads/sprites.h
index 82f0a9b10d..cf45be6806 100644
--- a/engines/mads/sprites.h
+++ b/engines/mads/sprites.h
@@ -30,7 +30,7 @@
 
 namespace MADS {
 
-enum SpriteType {
+enum SlotType {
 	ST_NONE = 0, ST_FOREGROUND = 1, ST_BACKGROUND = -4,
 	ST_FULL_SCREEN_REFRESH = -2, ST_EXPIRED = -1
 };
@@ -129,11 +129,11 @@ private:
 	static MADSEngine *_vm;
 	friend class SpriteSlots;
 public:
-	SpriteType _spriteType;
+	SlotType _SlotType;
 	int _seqIndex;
 public:
 	SpriteSlot();
-	SpriteSlot(SpriteType type, int seqIndex);
+	SpriteSlot(SlotType type, int seqIndex);
 
 	void setup(int dirtyAreaIndex);
 	bool operator==(const SpriteSlotSubset &other) const;
@@ -200,10 +200,12 @@ class SpriteSets : public Common::Array<SpriteAsset *> {
 private:
 	MADSEngine *_vm;
 public:
+	int _assetCount;
+
 	/**
 	 * Constructor
 	 */
-	SpriteSets(MADSEngine *vm) : _vm(vm) {}
+	SpriteSets(MADSEngine *vm) : _vm(vm), _assetCount(0) {}
 
 	/**
 	 * Destructor
@@ -224,27 +226,11 @@ public:
 	 * Adds a sprite asset to the list by name
 	 */
 	int addSprites(const Common::String &resName, int flags = 0);
-};
-
-class ImageInterEntry {
-public:
-	int _field0;
-	int _field2;
-	int _field3;
-	int _field4;
-	int _field6;
-	int _field8;
-
-	ImageInterEntry();
-};
 
-class ImageInterEntries: public Common::Array<ImageInterEntry> {
-public:
-	void add(int v1, int v2);
-	void add(int v1, int v2, int v3, int v4);
-	ImageInterEntry &add();
-
-	void call(int v1, int v2);
+	/**
+	 * Remove an asset from the list
+	 */
+	void remove(int idx);
 };
 
 } // End of namespace MADS
diff --git a/engines/mads/user_interface.cpp b/engines/mads/user_interface.cpp
index 5ab0b0f356..fd9f4c0153 100644
--- a/engines/mads/user_interface.cpp
+++ b/engines/mads/user_interface.cpp
@@ -27,16 +27,47 @@
 
 namespace MADS {
 
-void SceneNode::load(Common::SeekableReadStream *f) {
-	_walkPos.x = f->readSint16LE();
-	_walkPos.y = f->readSint16LE();
-	for (int i = 0; i < MAX_ROUTE_NODES; ++i)
-		_indexes[i] = f->readUint16LE();
+UISlot::UISlot() {
+	_slotType = ST_NONE;
+	_field2 = 0;
+	_field3 = 0;
+	_field4 = 0;
+	_field6 = 0;
+	_field8 = 0;
+}
+
+/*------------------------------------------------------------------------*/
+
+void UISlots::fullRefresh() {
+	UISlot slot;
+	slot._slotType = ST_FULL_SCREEN_REFRESH;
+	slot._field2 = -1;
+
+	push_back(slot);
+}
+
+void UISlots::add(int v1, int v2, int v3, int v4) {
+	assert(size() < 50);
+
+	UISlot ie;
+	ie._slotType = -3;
+	ie._field2 = 201;
+	ie._field6 = v1;
+	ie._field8 = v2;
+	ie._field4 = v3;
+	ie._field3 = v4;
+
+	push_back(ie);
+}
+
+void UISlots::call(int v1, int v2) {
+	debug("TODO: UISlots::call");
 }
 
 /*------------------------------------------------------------------------*/
 
 UserInterface::UserInterface(MADSEngine *vm) : _vm(vm) {
+	_invSpritesIndex = -1;
 	_category = CAT_NONE;
 	_screenObjectsCount = 0;
 	_inventoryTopIndex = 0;
@@ -99,8 +130,8 @@ void UserInterface::setup(int id) {
 	}
 	scene._screenObjects._v832EC = id;
 
-	scene._imageInterEntries.clear();
-	scene._imageInterEntries.add(-2, 0xff);
+	scene._userInterface._uiSlots.clear();
+	scene._userInterface._uiSlots.fullRefresh();
 	_vm->_game->_ticksExpiry = _vm->_events->getFrameCounter();
 	_v1A = -1;
 	_v1E = -1;
@@ -110,7 +141,7 @@ void UserInterface::setup(int id) {
 	copyTo(&_surface);
 
 	if (_vm->_game->_v1 == 5)
-		scene._imageInterEntries.call(0, 0);
+		scene._userInterface._uiSlots.call(0, 0);
 
 	scene._action.clear();
 	drawTextElements();
@@ -400,5 +431,27 @@ void UserInterface::drawTalkList() {
 	warning("TODO: drawTalkList");
 }
 
+void UserInterface::loadInventoryAnim(int objectId) {
+
+}
+
+void UserInterface::noInventoryAnim() {
+	Scene &scene = _vm->_game->_scene;
+
+	if (_invSpritesIndex >= 0) {
+		scene._sprites.remove(_invSpritesIndex);
+		_vm->_game->_ticksExpiry = _vm->_events->getFrameCounter();
+		_invSpritesIndex = -1;
+	}
+
+	if (!scene._screenObjects._v832EC)
+		refresh();
+}
+
+void UserInterface::refresh() {
+	Scene &scene = _vm->_game->_scene;
+	scene._userInterface._uiSlots.clear();
+//	scene._userInterface._uiSlots.new()
+}
 
 } // End of namespace MADS
diff --git a/engines/mads/user_interface.h b/engines/mads/user_interface.h
index cab26534c4..65c7e1ce55 100644
--- a/engines/mads/user_interface.h
+++ b/engines/mads/user_interface.h
@@ -36,9 +36,31 @@ enum ScrCategory {
 	CAT_12 = 12
 };
 
+class UISlot {
+public:
+	int _slotType;
+	int _field2;
+	int _field3;
+	int _field4;
+	int _field6;
+	int _field8;
+
+	UISlot();
+};
+
+class UISlots : public Common::Array<UISlot> {
+public:
+	void add(int v1, int v2, int v3, int v4);
+	void fullRefresh();
+
+	void call(int v1, int v2);
+};
+
+
 class UserInterface : public MSurface {
 private:
 	MADSEngine *_vm;
+	int _invSpritesIndex;
 
 	/**
 	 * Loads the elements of the user interface
@@ -84,6 +106,8 @@ private:
 	 * Draw a UI textual element
 	 */
 	void writeVocab(ScrCategory category, int id);
+
+	void refresh();
 public:
 	ScrCategory _category;
 	int _screenObjectsCount;
@@ -99,6 +123,7 @@ public:
 	int _v1A;
 	int _v1C;
 	int _v1E;
+	UISlots _uiSlots;
 public:
 	/**
 	* Constructor
@@ -120,6 +145,10 @@ public:
 	void drawTextElements();
 
 	void setBounds(const Common::Rect &r);
+
+	void loadInventoryAnim(int objectId);
+
+	void noInventoryAnim();
 };
 
 } // End of namespace MADS