ILLUSIONS: More work on the script system

6 files changed, 238 insertions, 0 deletions

diff --git a/engines/illusions/illusions.cpp b/engines/illusions/illusions.cpp
index 17fb730a50..3ff6750718 100644
--- a/engines/illusions/illusions.cpp
+++ b/engines/illusions/illusions.cpp
@@ -33,6 +33,7 @@
 #include "illusions/actorresource.h"
 #include "illusions/thread.h"
 #include "illusions/scriptresource.h"
+#include "illusions/scriptman.h"
 
 #include "audio/audiostream.h"
 #include "common/config-manager.h"
diff --git a/engines/illusions/module.mk b/engines/illusions/module.mk
index e8d83eff88..5ba65d7e9d 100644
--- a/engines/illusions/module.mk
+++ b/engines/illusions/module.mk
@@ -11,6 +11,7 @@ MODULE_OBJS := \
 	illusions.o \
 	input.o \
 	resourcesystem.o \
+	scriptman.o \
 	scriptresource.o \
 	spritedecompressqueue.o \
 	spritedrawqueue.o \
diff --git a/engines/illusions/scriptman.cpp b/engines/illusions/scriptman.cpp
new file mode 100644
index 0000000000..922ce605bb
--- /dev/null
+++ b/engines/illusions/scriptman.cpp
@@ -0,0 +1,126 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "illusions/illusions.h"
+#include "illusions/scriptman.h"
+
+namespace Illusions {
+
+// ActiveScenes
+
+void ActiveScenes::clear() {
+	_stack.clear();
+}
+
+void ActiveScenes::push(uint32 sceneId) {
+	ActiveScene activeScene;
+	activeScene._sceneId = sceneId;
+	activeScene._pauseCtr = 0;
+	_stack.push(activeScene);
+}
+
+void ActiveScenes::pop() {
+	_stack.pop();
+}
+
+void ActiveScenes::pauseActiveScene() {
+	++_stack.top()._pauseCtr;
+}
+
+void ActiveScenes::unpauseActiveScene() {
+	--_stack.top()._pauseCtr;
+}
+
+int ActiveScenes::getActiveScenesCount() {
+	return _stack.size();
+}
+
+void ActiveScenes::getActiveSceneInfo(uint index, uint32 *sceneId, int *pauseCtr) {
+	if (sceneId)
+		*sceneId = _stack[index]._sceneId;
+	if (pauseCtr)
+		*pauseCtr = _stack[index]._pauseCtr;
+}
+
+uint32 ActiveScenes::getCurrentScene() {
+	if (_stack.size() > 0)
+		return _stack.top()._sceneId;
+	return 0;
+}
+
+bool ActiveScenes::isSceneActive(uint32 sceneId) {
+	for (uint i = 0; i < _stack.size(); ++i)
+		if (_stack[i]._sceneId == sceneId && _stack[i]._pauseCtr <= 0)
+			return true;
+	return false;
+}
+
+// ScriptStack
+
+ScriptStack::ScriptStack() {
+	clear();
+}
+
+void ScriptStack::clear() {
+	for (uint i = 0; i < 256; ++i)
+		_stack[i] = (int16)0xEEEE;
+	_stackPos = 256;
+}
+
+void ScriptStack::push(int16 value) {
+	--_stackPos;
+	if (_stackPos > 0)
+		_stack[_stackPos] = value;
+}
+
+int16 ScriptStack::pop() {
+	int16 value = 0;
+	if (_stackPos < 256) {
+		value = _stack[_stackPos];
+		_stack[_stackPos] = (int16)0xEEEE;
+		++_stackPos;
+	}
+	return value;
+}
+
+int16 ScriptStack::peek() {
+	int16 value = 0;
+	if (_stackPos < 256)
+		value = _stack[_stackPos];
+	return value;
+}
+
+// ScriptMan
+
+ScriptMan::ScriptMan(IllusionsEngine *vm)
+	: _vm(vm) {
+}
+
+ScriptMan::~ScriptMan() {
+}
+
+void ScriptMan::setSceneIdThreadId(uint32 theSceneId, uint32 theThreadId) {
+	_theSceneId = theSceneId;
+	_theThreadId = theThreadId;
+}
+
+} // End of namespace Illusions
diff --git a/engines/illusions/scriptman.h b/engines/illusions/scriptman.h
new file mode 100644
index 0000000000..18b6090fa2
--- /dev/null
+++ b/engines/illusions/scriptman.h
@@ -0,0 +1,85 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef ILLUSIONS_SCRIPTMAN_H
+#define ILLUSIONS_SCRIPTMAN_H
+
+#include "illusions/scriptresource.h"
+#include "common/algorithm.h"
+#include "common/stack.h"
+
+namespace Illusions {
+
+class IllusionsEngine;
+
+struct ActiveScene {
+	uint32 _sceneId;
+	int _pauseCtr;
+};
+
+class ActiveScenes {
+public:
+	ActiveScenes();
+	void clear();
+	void push(uint32 sceneId);
+	void pop();
+	void pauseActiveScene();
+	void unpauseActiveScene();
+	int getActiveScenesCount();
+	void getActiveSceneInfo(uint index, uint32 *sceneId, int *pauseCtr);
+	uint32 getCurrentScene();
+	bool isSceneActive(uint32 sceneId);
+protected:
+	Common::FixedStack<ActiveScene, 16> _stack;
+};
+
+class ScriptStack {
+public:
+	ScriptStack();
+	void clear();
+	void push(int16 value);
+	int16 pop();
+	int16 peek();
+protected:
+	int _stackPos;
+	int16 _stack[256];
+};
+
+class ScriptMan {
+public:
+	ScriptMan(IllusionsEngine *vm);
+	~ScriptMan();
+	void setSceneIdThreadId(uint32 theSceneId, uint32 theThreadId);
+public:
+
+	IllusionsEngine *_vm;
+	ActiveScenes _activeScenes;
+	ScriptStack _stack;
+	
+	uint32 _theSceneId;
+	uint32 _theThreadId;
+	
+};
+
+} // End of namespace Illusions
+
+#endif // ILLUSIONS_SCRIPTMAN_H
diff --git a/engines/illusions/scriptresource.cpp b/engines/illusions/scriptresource.cpp
index 27f5cad5e1..5d9b86a36e 100644
--- a/engines/illusions/scriptresource.cpp
+++ b/engines/illusions/scriptresource.cpp
@@ -71,6 +71,18 @@ void BlockCounters::init(uint count, byte *blockCounters) {
 	_blockCounters = blockCounters;
 }
 
+void BlockCounters::clear() {
+	for (uint i = 0; i < _count; ++i)
+		_blockCounters[i] = 0;
+}
+
+byte BlockCounters::get(uint index) {
+	return _blockCounters[index] & 0x3F;
+}
+
+void BlockCounters::set(uint index, byte value) {
+	_blockCounters[index] = (get(index) ^ value) & 0x3F;
+}
 
 // TriggerCause
 
@@ -159,6 +171,9 @@ ScriptResource::~ScriptResource() {
 void ScriptResource::load(byte *data, uint32 dataSize) {
 	Common::MemoryReadStream stream(data, dataSize, DisposeAfterUse::NO);
 	
+	_data = data;
+	_dataSize = dataSize;
+	
 	stream.skip(4); // Skip unused
 	uint propertiesCount = stream.readUint16LE();
 	uint blockCountersCount = stream.readUint16LE();
@@ -194,4 +209,8 @@ void ScriptResource::load(byte *data, uint32 dataSize) {
 
 }
 
+byte *ScriptResource::getThreadCode(uint32 threadId) {
+	return _data + _codeOffsets[threadId & 0xFFFF];
+}
+
 } // End of namespace Illusions
diff --git a/engines/illusions/scriptresource.h b/engines/illusions/scriptresource.h
index 4e010e975b..206aa4b77d 100644
--- a/engines/illusions/scriptresource.h
+++ b/engines/illusions/scriptresource.h
@@ -54,6 +54,9 @@ class BlockCounters {
 public:
 	BlockCounters();
 	void init(uint count, byte *blockCounters);
+	void clear();
+	byte get(uint index);
+	void set(uint index, byte value);
 public:
 	uint _count;
 	byte *_blockCounters;
@@ -95,7 +98,10 @@ public:
 	ScriptResource();
 	~ScriptResource();
 	void load(byte *data, uint32 dataSize);
+	byte *getThreadCode(uint32 threadId);
 public:
+	byte *_data;
+	uint32 _dataSize;
 	Properties _properties;
 	BlockCounters _blockCounters;
 	uint32 *_codeOffsets;