SHERLOCK: Implemented setObjTalkSequence methods

4 files changed, 164 insertions, 15 deletions

diff --git a/engines/sherlock/objects.cpp b/engines/sherlock/objects.cpp
index 124e7c5c1c..9e4a20f565 100644
--- a/engines/sherlock/objects.cpp
+++ b/engines/sherlock/objects.cpp
@@ -368,6 +368,24 @@ const Common::Rect Sprite::getOldBounds() const {
 	return Common::Rect(_oldPosition.x, _oldPosition.y, _oldPosition.x + _oldSize.x, _oldPosition.y + _oldSize.y);
 }
 
+void Sprite::setObjTalkSequence(int seq) {
+	assert(seq != -1 && _type == CHARACTER);
+
+	if (_seqTo) {
+		// reset to previous value
+		_walkSequences[_sequenceNumber]._sequences[_frameNumber] = _seqTo;
+		_seqTo = 0;
+	}
+
+	_sequenceNumber = _gotoSeq;
+	_frameNumber = 0;
+	checkWalkGraphics();
+}
+
+void Sprite::checkWalkGraphics() {
+	error("TODO: checkWalkGraphics");
+}
+
 /*----------------------------------------------------------------*/
 
 void WalkSequence::load(Common::SeekableReadStream &s) {
@@ -493,7 +511,7 @@ Object::Object() {
 	_requiredFlag1 = 0;
 	_gotoSeq = 0;
 	_talkSeq = 0;
-	_restoreSlot = 0;
+	_restoreSlot = -1;
 }
 
 void Object::load(Common::SeekableReadStream &s, bool isRoseTattoo) {
@@ -888,7 +906,86 @@ void Object::setObjSequence(int seq, bool wait) {
 }
 
 void Object::setObjTalkSequence(int seq) {
-	error("TODO: setObjTalkSequence");
+	Talk &talk = *_vm->_talk;
+
+	// See if we're supposed to restore the object's sequence from the talk sequence stack
+	if (seq == -1) {
+		TalkSequence &ts = talk._talkSequenceStack[_restoreSlot];
+		if (_seqTo != 0)
+			_sequences[_frameNumber] = _seqTo;
+		_frameNumber = ts._frameNumber;
+		_sequenceNumber = ts._sequenceNumber;
+		_seqStack = ts._seqStack;
+		_seqTo = ts._seqTo;
+		_seqCounter = ts._seqCounter;
+		_seqCounter2 = ts._seqCounter2;
+		_talkSeq = 0;
+
+		// Flag this slot as free again
+		ts._obj = nullptr;
+
+		return;
+	}
+
+	assert(_type != CHARACTER);
+
+	// If the object passed in is an NPC, set it's sequence through the sequence number rather
+	// than adjusting the frame number to a specific sub-sequence
+	/*	
+		s = (SpriteType *)bg;
+		if (s->seqto)
+		{
+			// reset to previous value
+			s->WalkSeqs[s->fs]->Seq[s->fn] = s->seqto;
+			s->seqto = 0;
+		}
+		s->fs = s->GotoSeq;
+		s->fn = 0;
+		CheckWalkGraphics(s);
+	*/
+	
+	talk.pushTalkSequence(this);
+	int talkSeqNum = seq;
+
+	// Find where the talk sequence data begins in the object
+	int idx = 0;
+	for (;;) {
+		// Get the Frame value
+		byte f = _sequences[idx++];
+
+		// See if we've found the beginning of a Talk Sequence
+		if ((f == TALK_SEQ_CODE && seq < 128) || (f == TALK_LISTEN_CODE && seq > 128)) {
+			--seq;
+
+			// See if we're at the correct Talk Sequence Number
+			if (!(seq & 127))
+			{
+				// Correct Sequence, Start Talking Here
+				if (_seqTo != 0)
+					_sequences[_frameNumber] = _seqTo;
+				_frameNumber = idx;
+				_seqTo = 0;
+				_seqStack = 0;
+				_seqCounter = 0;
+				_seqCounter2 = 0;
+				_talkSeq = talkSeqNum;
+				break;
+			}
+		} else {
+			// Move ahead any extra because of special control codes
+			switch (f) {
+			case 0: idx++; break;
+			case MOVE_CODE:
+			case TELEPORT_CODE: idx += 4; break;
+			case CALL_TALK_CODE: idx += 8; break;
+			case HIDE_CODE: idx += 2; break;
+			}
+		}
+
+		// See if we're out of sequence data
+		if (idx >= (int)_seqSize)
+			break;
+	}
 }
 
 int Object::checkNameForCodes(const Common::String &name, const char *const messages[]) {
diff --git a/engines/sherlock/objects.h b/engines/sherlock/objects.h
index 936adc57d0..bd32948763 100644
--- a/engines/sherlock/objects.h
+++ b/engines/sherlock/objects.h
@@ -165,6 +165,12 @@ struct UseType {
 class Sprite {
 private:
 	static SherlockEngine *_vm;
+
+	/**
+	 * Checks a sprite associated with an NPC to see if the frame sequence specified
+	 * in the sequence number uses alternate graphics, and if so if they need to be loaded
+	 */
+	void checkWalkGraphics();
 public:
 	Common::String _name;
 	Common::String _description;
@@ -243,6 +249,15 @@ public:
 	void checkSprite();
 
 	/**
+	 * Adjusts the frame and sequence variables of a sprite that corresponds to the current speaker
+	 * so that it points to the beginning of the sequence number's talk sequence in the object's
+	 * sequence buffer
+	 * @param seq	Which sequence to use (if there's more than 1)
+	 * @remarks		1: First talk seq, 2: second talk seq, etc.
+	 */
+	void setObjTalkSequence(int seq);
+
+	/**
 	* Return frame width
 	*/
 	int frameWidth() const { return _imageFrame ? _imageFrame->_frame.w : 0; }
diff --git a/engines/sherlock/talk.cpp b/engines/sherlock/talk.cpp
index 319cb10850..bb5c11c81f 100644
--- a/engines/sherlock/talk.cpp
+++ b/engines/sherlock/talk.cpp
@@ -222,12 +222,13 @@ TalkHistoryEntry::TalkHistoryEntry() {
 
 /*----------------------------------------------------------------*/
 
-TalkSequences::TalkSequences(const byte *data) {
-	Common::copy(data, data + MAX_TALK_SEQUENCES, _data);
-}
-
-void TalkSequences::clear() {
-	Common::fill(&_data[0], &_data[MAX_TALK_SEQUENCES], 0);
+TalkSequence::TalkSequence() {
+	_obj = nullptr;
+	_frameNumber = 0;
+	_sequenceNumber = 0;
+	_seqStack = 0;
+	_seqTo = 0;
+	_seqCounter = _seqCounter2 = 0;
 }
 
 /*----------------------------------------------------------------*/
@@ -1022,6 +1023,31 @@ void Talk::pushSequence(int speaker) {
 		error("script stack overflow");
 }
 
+void Talk::pushTalkSequence(Object *obj) {
+	// Check if the shape is already on the stack
+	for (uint idx = 0; idx < TALK_SEQUENCE_STACK_SIZE; ++idx) {
+		if (_talkSequenceStack[idx]._obj = obj)
+			return;
+	}
+
+	// Find a free slot and save the details in it
+	for (uint idx = 0; idx < TALK_SEQUENCE_STACK_SIZE; ++idx) {
+		TalkSequence &ts = _talkSequenceStack[idx];
+		if (ts._obj == nullptr) {
+			ts._obj = obj;
+			ts._frameNumber = obj->_frameNumber;
+			ts._sequenceNumber = obj->_sequenceNumber;
+			ts._seqStack = obj->_seqStack;
+			ts._seqTo = obj->_seqTo;
+			ts._seqCounter = obj->_seqCounter;
+			ts._seqCounter2 = obj->_seqCounter2;
+			return;
+		}
+	}
+
+	error("Ran out of talk sequence stack space");
+}
+
 void Talk::setSequence(int speaker) {
 	People &people = *_vm->_people;
 	Scene &scene = *_vm->_scene;
diff --git a/engines/sherlock/talk.h b/engines/sherlock/talk.h
index ebfe8f1732..79616b246b 100644
--- a/engines/sherlock/talk.h
+++ b/engines/sherlock/talk.h
@@ -29,11 +29,13 @@
 #include "common/serializer.h"
 #include "common/stream.h"
 #include "common/stack.h"
+#include "sherlock/objects.h"
 
 namespace Sherlock {
 
 #define MAX_TALK_SEQUENCES 11
 #define MAX_TALK_FILES 500
+#define TALK_SEQUENCE_STACK_SIZE 20
 
 enum {
 	OP_SWITCH_SPEAKER			= 0,
@@ -153,16 +155,19 @@ struct TalkHistoryEntry {
 	bool &operator[](int index) { return _data[index]; }
 };
 
-struct TalkSequences {
-	byte _data[MAX_TALK_SEQUENCES];
+struct TalkSequence {
+	Object *_obj;			// Pointer to the bgshape that these values go to
+	short _frameNumber;		// Frame number in frame sequence to draw
+	short _sequenceNumber;	// Start frame of sequences that are repeated
+	int _seqStack;			// Allows gosubs to return to calling frame
+	int _seqTo;				// Allows 1-5, 8-3 type sequences encoded 
+	int _seqCounter;		// How many times this sequence has been executed
+	int _seqCounter2;
 
-	TalkSequences() { clear(); }
-	TalkSequences(const byte *data);
-
-	byte &operator[](int idx) { return _data[idx]; }
-	void clear();
+	TalkSequence();
 };
 
+
 class Talk {
 	friend class Scalpel::ScalpelUserInterface;
 private:
@@ -248,6 +253,7 @@ protected:
 	OpcodeReturn cmdWalkToCAnimation(const byte *&str);
 	OpcodeReturn cmdWalkToCoords(const byte *&str);
 public:
+	TalkSequence _talkSequenceStack[TALK_SEQUENCE_STACK_SIZE];
 	bool _talkToAbort;
 	int _talkCounter;
 	int _talkTo;
@@ -324,6 +330,11 @@ public:
 	void pushSequence(int speaker);
 	
 	/**
+	 * Push a given shape's sequence data onto the Rose Tattoo talk sequence stack
+	 */
+	void pushTalkSequence(Object *obj);
+
+	/**
 	 * Change the sequence of the scene background object associated with the current speaker.
 	 */
 	void setSequence(int speaker);