TITANIC: Change engine to use titanic.dat

engines/titanic/support/files_manager.cpp

@@ -28,10 +28,38 @@ namespace Titanic {
 
 CFilesManager::CFilesManager() : _gameManager(nullptr), _assetsPath("Assets"),
 		_field0(0), _drive(-1), _field18(0), _field1C(0), _field3C(0) {
-	_exeResources.loadFromEXE("st.exe");
+	loadResourceIndex();
 }
 
 CFilesManager::~CFilesManager() {
+	_datFile.close();
+}
+
+void CFilesManager::loadResourceIndex() {
+	if (!_datFile.open("titanic.dat"))
+		error("Could not find titanic.dat data file");
+
+	uint headerId = _datFile.readUint32BE();
+	uint version = _datFile.readUint16LE();
+	if (headerId != MKTAG('S', 'V', 'T', 'N') || version < 1)
+		error("Invalid data file");
+
+	// Read in entries
+	uint offset, size;
+	char c;
+	Common::String resourceName;
+	for (;;) {
+		offset = _datFile.readUint32LE();
+		size = _datFile.readUint32LE();
+		if (size == 0)
+			break;
+
+		Common::String resName;
+		while ((c = _datFile.readByte()) != '\0')
+			resName += c;
+
+		_resources[resName] = ResourceEntry(offset, size);
+	}
 }
 
 bool CFilesManager::fileExists(const CString &name) {
@@ -92,9 +120,11 @@ void CFilesManager::preload(const CString &name) {
 	// We don't currently do any preloading of resources
 }
 
-Common::SeekableReadStream *CFilesManager::getResource(
-		Common::WinResourceID area, Common::WinResourceID name) {
-	return _exeResources.getResource(area, name);
+Common::SeekableReadStream *CFilesManager::getResource(const CString &str) {
+	ResourceEntry resEntry = _resources[str];
+	_datFile.seek(resEntry._offset);
+
+	return _datFile.readStream(resEntry._size);
 }
 
 } // End of namespace Titanic

engines/titanic/support/files_manager.h

@@ -23,7 +23,7 @@
 #ifndef TITANIC_FILES_MANAGER_H
 #define TITANIC_FILES_MANAGER_H
 
-#include "common/winexe_pe.h"
+#include "common/hashmap.h"
 #include "titanic/core/list.h"
 #include "titanic/support/screen_manager.h"
 
@@ -35,9 +35,18 @@ class CFilesManagerList : public List<ListItem> {
 };
 
 class CFilesManager {
+	struct ResourceEntry {
+		uint _offset;
+		uint _size;
+		
+		ResourceEntry() : _offset(0), _size(0) {}
+		ResourceEntry(uint offset, uint size) : _offset(offset), _size(size) {}
+	};
+	typedef Common::HashMap<Common::String, ResourceEntry> ResourceHash;
 private:
 	CGameManager *_gameManager;
-	Common::PEResources _exeResources;
+	Common::File _datFile;
+	ResourceHash _resources;
 	CFilesManagerList _list;
 	CString _string1;
 	CString _string2;
@@ -47,6 +56,8 @@ private:
 	int _field1C;
 	int _field3C;
 	const CString _assetsPath;
+private:
+	void loadResourceIndex();
 public:
 	CFilesManager();
 	~CFilesManager();
@@ -90,8 +101,7 @@ public:
 	/**
 	 * Get a resource from the executable
 	 */
-	Common::SeekableReadStream *getResource(Common::WinResourceID area,
-		Common::WinResourceID name);
+	Common::SeekableReadStream *getResource(const CString &str);
 };
 
 } // End of namespace Titanic

engines/titanic/support/font.cpp

@@ -42,7 +42,7 @@ STFont::~STFont() {
 void STFont::load(int fontNumber) {
 	assert(!_dataPtr);
 	Common::SeekableReadStream *stream = g_vm->_filesManager->getResource(
-		Common::WinResourceID("STFONT"), fontNumber);
+		CString::format("STFONT/%d", fontNumber));
 	if (!stream)
 		error("Could not locate the specified font");
 

engines/titanic/true_talk/title_engine.cpp

@@ -67,7 +67,7 @@ void STtitleEngine::dump(int val1, int val2) {
 
 SimpleFile *STtitleEngine::open(const CString &name) {
 	Common::SeekableReadStream *stream = g_vm->_filesManager->getResource(
-		Common::WinResourceID("TEXT"), name);
+		CString::format("TEXT/%s", name.c_str()));
 	assert(stream);
 
 	SimpleFile *file = new SimpleFile();