SCUMM: Add support for Steam versions of Indy 3, Indy 4, Loom and Dig

Many Thanks to Ben Castricum for the original patch

7 files changed, 160 insertions, 15 deletions

diff --git a/engines/scumm/detection.cpp b/engines/scumm/detection.cpp
index b7a25808a5..55df5926fc 100644
--- a/engines/scumm/detection.cpp
+++ b/engines/scumm/detection.cpp
@@ -79,10 +79,12 @@ Common::String ScummEngine::generateFilename(const int room) const {
 	} else {
 		switch (_filenamePattern.genMethod) {
 		case kGenDiskNum:
+		case kGenDiskNumSteam:
 			result = Common::String::format(_filenamePattern.pattern, diskNumber);
 			break;
 
 		case kGenRoomNum:
+		case kGenRoomNumSteam:
 			result = Common::String::format(_filenamePattern.pattern, room);
 			break;
 
@@ -209,14 +211,30 @@ Common::String ScummEngine_v70he::generateFilename(const int room) const {
 	return result;
 }
 
-static Common::String generateFilenameForDetection(const char *pattern, FilenameGenMethod genMethod) {
+static const char *getSteamExeNameFromPattern(Common::String pattern, Common::Platform platform) {
+	for (const SteamIndexFile *indexFile = steamIndexFiles; indexFile->len; ++indexFile) {
+		if (platform == indexFile->platform && pattern.equalsIgnoreCase(indexFile->pattern))
+			return indexFile->executableName;
+	}
+
+	error("Unable to find Steam executable from detection pattern");
+	return "";
+}
+
+static Common::String generateFilenameForDetection(const char *pattern, FilenameGenMethod genMethod, Common::Platform platform) {
 	Common::String result;
+	Common::String patternStr = pattern;
 
 	switch (genMethod) {
 	case kGenDiskNum:
 	case kGenRoomNum:
 		result = Common::String::format(pattern, 0);
 		break;
+	
+	case kGenDiskNumSteam:
+	case kGenRoomNumSteam:
+		result = getSteamExeNameFromPattern(pattern, platform);
+		break;
 
 	case kGenHEPC:
 	case kGenHEIOS:
@@ -528,7 +546,8 @@ static void detectGames(const Common::FSList &fslist, Common::List<DetectorResul
 	DetectorResult dr;
 
 	// Dive one level down since mac indy3/loom has its files split into directories. See Bug #1438631
-	composeFileHashMap(fileMD5Map, fslist, 2, directoryGlobs);
+	// Dive two levels down for Mac Steam games
+	composeFileHashMap(fileMD5Map, fslist, 3, directoryGlobs);
 
 	// Iterate over all filename patterns.
 	for (const GameFilenamePattern *gfp = gameFilenamesTable; gfp->gameid; ++gfp) {
@@ -540,7 +559,7 @@ static void detectGames(const Common::FSList &fslist, Common::List<DetectorResul
 		// Generate the detectname corresponding to the gfp. If the file doesn't
 		// exist in the directory we are looking at, we can skip to the next
 		// one immediately.
-		Common::String file(generateFilenameForDetection(gfp->pattern, gfp->genMethod));
+		Common::String file(generateFilenameForDetection(gfp->pattern, gfp->genMethod, gfp->platform));
 		if (!fileMD5Map.contains(file))
 			continue;
 
@@ -1025,7 +1044,7 @@ Common::Error ScummMetaEngine::createInstance(OSystem *syst, Engine **engine) co
 	Common::FSNode dir(ConfMan.get("path"));
 	if (!dir.isDirectory())
 		return Common::kPathNotDirectory;
-	if (!dir.getChildren(fslist, Common::FSNode::kListFilesOnly))
+	if (!dir.getChildren(fslist, Common::FSNode::kListAll))
 		return Common::kNoGameDataFoundError;
 
 	// Invoke the detector, but fixed to the specified gameid.
@@ -1081,7 +1100,7 @@ Common::Error ScummMetaEngine::createInstance(OSystem *syst, Engine **engine) co
 
 		md5Warning += Common::String::format("  SCUMM gameid '%s', file '%s', MD5 '%s'\n\n",
 				res.game.gameid,
-				generateFilenameForDetection(res.fp.pattern, res.fp.genMethod).c_str(),
+				generateFilenameForDetection(res.fp.pattern, res.fp.genMethod, Common::kPlatformUnknown).c_str(),
 				res.md5.c_str());
 
 		g_system->logMessage(LogMessageType::kWarning, md5Warning.c_str());
diff --git a/engines/scumm/detection.h b/engines/scumm/detection.h
index f714812a9c..0587c3fab1 100644
--- a/engines/scumm/detection.h
+++ b/engines/scumm/detection.h
@@ -95,7 +95,9 @@ struct GameSettings {
 
 enum FilenameGenMethod {
 	kGenDiskNum,
+	kGenDiskNumSteam,
 	kGenRoomNum,
+	kGenRoomNumSteam,
 	kGenHEMac,
 	kGenHEMacNoParens,
 	kGenHEPC,
diff --git a/engines/scumm/detection_tables.h b/engines/scumm/detection_tables.h
index c876af1256..1dccbd32a3 100644
--- a/engines/scumm/detection_tables.h
+++ b/engines/scumm/detection_tables.h
@@ -52,6 +52,8 @@ namespace Scumm {
  */
 static const char *const directoryGlobs[] = {
 	"rooms *",  // Mac version of indy3/loom
+	"Contents", // Mac Steam versions
+	"MacOS",    // Mac Steam versions
 	0
 };
 
@@ -221,6 +223,7 @@ static const GameSettings gameVariantsTable[] = {
 	{"indy3", "EGA",      "ega", GID_INDY3, 3, 0, MDT_PCSPK | MDT_PCJR | MDT_CMS | MDT_ADLIB, 0, UNK, GUIO2(GUIO_NOSPEECH, GUIO_NOMIDI)},
 	{"indy3", "No AdLib", "ega", GID_INDY3, 3, 0, MDT_PCSPK | MDT_PCJR,             0, UNK, GUIO2(GUIO_NOSPEECH, GUIO_NOMIDI)},
 	{"indy3", "VGA",      "vga", GID_INDY3, 3, 0, MDT_PCSPK | MDT_PCJR | MDT_CMS | MDT_ADLIB, GF_OLD256 | GF_FEW_LOCALS,                  Common::kPlatformDOS, GUIO2(GUIO_NOSPEECH, GUIO_NOMIDI)},
+	{"indy3", "Steam",  "steam", GID_INDY3, 3, 0, MDT_PCSPK | MDT_PCJR | MDT_CMS | MDT_ADLIB, GF_OLD256 | GF_FEW_LOCALS, UNK, GUIO2(GUIO_NOSPEECH, GUIO_NOMIDI)},
 	{"indy3", "FM-TOWNS",     0, GID_INDY3, 3, 0, MDT_TOWNS,             GF_OLD256 | GF_FEW_LOCALS | GF_AUDIOTRACKS, Common::kPlatformFMTowns, GUIO4(GUIO_NOSPEECH, GUIO_NOMIDI, GUIO_MIDITOWNS, GUIO_NOASPECT)},
 
 	{"loom", "EGA",      "ega", GID_LOOM, 3, 0, MDT_PCSPK | MDT_PCJR | MDT_CMS | MDT_ADLIB | MDT_MIDI | MDT_PREFER_MT32, 0, UNK, GUIO1(GUIO_NOSPEECH)},
@@ -230,6 +233,7 @@ static const GameSettings gameVariantsTable[] = {
 #endif
 	{"loom", "FM-TOWNS",     0, GID_LOOM, 3, 0, MDT_TOWNS,                        GF_AUDIOTRACKS | GF_OLD256, Common::kPlatformFMTowns, GUIO4(GUIO_NOSPEECH, GUIO_NOMIDI, GUIO_MIDITOWNS, GUIO_NOASPECT)},
 	{"loom", "VGA",      "vga", GID_LOOM, 4, 0, MDT_NONE,                         GF_AUDIOTRACKS,             Common::kPlatformDOS, GUIO2(GUIO_NOSPEECH, GUIO_NOMIDI)},
+	{"loom", "Steam",  "steam", GID_LOOM, 4, 0, MDT_NONE,                         GF_AUDIOTRACKS,  UNK, GUIO2(GUIO_NOSPEECH, GUIO_NOMIDI)},
 
 	{"pass", 0, 0, GID_PASS, 4, 0, MDT_PCSPK | MDT_PCJR | MDT_CMS | MDT_ADLIB, GF_16COLOR, Common::kPlatformDOS, GUIO2(GUIO_NOSPEECH, GUIO_NOMIDI)},
 
@@ -245,6 +249,7 @@ static const GameSettings gameVariantsTable[] = {
 	{"monkey2", "FM-TOWNS", 0, GID_MONKEY2,  5, 0, MDT_PCSPK | MDT_TOWNS | MDT_ADLIB | MDT_MIDI | MDT_PREFER_MT32, 0, Common::kPlatformFMTowns, GUIO5(GUIO_NOSPEECH, GUIO_MIDITOWNS, GUIO_MIDIADLIB, GUIO_MIDIMT32, GUIO_NOASPECT)},
 
 	{"atlantis", "", 0, GID_INDY4,    5, 0, MDT_PCSPK | MDT_ADLIB | MDT_MIDI | MDT_PREFER_MT32, 0, UNK, GUIO0()},
+	{"atlantis", "Steam", "steam", GID_INDY4,    5, 0, MDT_PCSPK | MDT_ADLIB | MDT_MIDI | MDT_PREFER_MT32, 0, UNK, GUIO0()},
 	{"atlantis", "Floppy", 0, GID_INDY4,    5, 0, MDT_PCSPK | MDT_ADLIB | MDT_MIDI | MDT_PREFER_MT32, 0, UNK, GUIO1(GUIO_NOSPEECH)},
 	{"atlantis", "FM-TOWNS", 0, GID_INDY4,    5, 0, MDT_TOWNS | MDT_ADLIB | MDT_MIDI | MDT_PREFER_MT32, 0, Common::kPlatformFMTowns, GUIO4(GUIO_MIDITOWNS, GUIO_MIDIADLIB, GUIO_MIDIMT32, GUIO_NOASPECT)},
 
@@ -257,7 +262,8 @@ static const GameSettings gameVariantsTable[] = {
 #ifdef ENABLE_SCUMM_7_8
 	{"ft",       0, 0, GID_FT,  7, 0, MDT_NONE, 0, UNK, GUIO1(GUIO_NOMIDI)},
 
-	{"dig",      0, 0, GID_DIG, 7, 0, MDT_NONE, 0, UNK, GUIO1(GUIO_NOMIDI)},
+	{"dig",       "",       0, GID_DIG, 7, 0, MDT_NONE, 0, UNK, GUIO1(GUIO_NOMIDI)},
+	{"dig",  "Steam", "steam", GID_DIG, 7, 0, MDT_NONE, 0, UNK, GUIO1(GUIO_NOMIDI)},
 
 	{"comi",     0, 0, GID_CMI, 8, 0, MDT_NONE, 0, Common::kPlatformWindows, GUIO2(GUIO_NOMIDI, GUIO_NOASPECT)},
 #endif
@@ -422,10 +428,10 @@ static const GameSettings gameVariantsTable[] = {
 using Common::UNK_LANG;
 
 // The following describes how Fingolfin thinks this table might be used one day;
-// this is work in progress, so read this with a salt of grain...
+// this is work in progress, so read this with a grain of salt...
 //
 // The following table maps gameids to possible filename variants for that game.
-// This information is used by the detector to determin possible "detect files".
+// This information is used by the detector to determine possible "detect files".
 // It is also later used by the engine creation code to verify the game to be
 // launched is present. Finally, the correct GameFilenamePattern entry is passed on
 // to the engine which uses it to locate the files for the game.
@@ -451,6 +457,8 @@ static const GameFilenamePattern gameFilenamesTable[] = {
 	{ "zak", "zak1.d64", kGenUnchanged, UNK_LANG, Common::kPlatformC64, "V1" },         // ... and zak2.d64
 
 	{ "indy3", "%02d.LFL", kGenRoomNum, UNK_LANG, UNK, 0 },
+	{ "indy3", "%02d.LFL", kGenRoomNumSteam, UNK_LANG, Common::kPlatformWindows, "Steam" },
+	{ "indy3", "%02d.LFL", kGenRoomNumSteam, UNK_LANG, Common::kPlatformMacintosh, "Steam" },
 
 	{ "indyloom", "%02d.LFL", kGenRoomNum, UNK_LANG, UNK, 0 },
 	{ "indyzak", "%02d.LFL", kGenRoomNum, UNK_LANG, UNK, 0 },
@@ -458,6 +466,8 @@ static const GameFilenamePattern gameFilenamesTable[] = {
 
 	{ "loom", "%02d.LFL", kGenRoomNum, UNK_LANG, UNK, 0 },
 	{ "loom", "%03d.LFL", kGenRoomNum, UNK_LANG, UNK, "VGA" },	// Loom CD
+	{ "loom", "%03d.LFL", kGenRoomNumSteam, UNK_LANG, Common::kPlatformWindows, "Steam" },
+	{ "loom", "%03d.LFL", kGenRoomNumSteam, UNK_LANG, Common::kPlatformMacintosh, "Steam" },
 
 	{ "pass", "%03d.LFL", kGenRoomNum, UNK_LANG, UNK, 0 },
 
@@ -471,6 +481,8 @@ static const GameFilenamePattern gameFilenamesTable[] = {
 	{ "monkey2", "mi2demo.%03d", kGenDiskNum, UNK_LANG, UNK, 0 },
 
 	{ "atlantis", "atlantis.%03d", kGenDiskNum, UNK_LANG, UNK, 0 },
+	{ "atlantis", "atlantis.%03d", kGenDiskNumSteam, UNK_LANG, Common::kPlatformWindows, "Steam" },
+	{ "atlantis", "atlantis.%03d", kGenDiskNumSteam, UNK_LANG, Common::kPlatformMacintosh, "Steam" },
 	{ "atlantis", "fate.%03d", kGenDiskNum, UNK_LANG, UNK, 0 },
 	{ "atlantis", "playfate.%03d", kGenDiskNum, UNK_LANG, UNK, 0 },
 	{ "atlantis", "indy4.%03d", kGenDiskNum, Common::JA_JPN, Common::kPlatformFMTowns, "FM-TOWNS" },
@@ -494,6 +506,8 @@ static const GameFilenamePattern gameFilenamesTable[] = {
 
 #ifdef ENABLE_SCUMM_7_8
 	{ "dig", "dig.la%d", kGenDiskNum, UNK_LANG, UNK, 0 },
+	{ "dig", "dig.la%d", kGenDiskNumSteam, UNK_LANG, Common::kPlatformWindows, "Steam" },
+	{ "dig", "dig.la%d", kGenDiskNumSteam, UNK_LANG, Common::kPlatformMacintosh, "Steam" },
 	{ "dig", "thedig.la%d", kGenDiskNum, UNK_LANG, UNK, "Demo" }, // Used by an alternate version of the demo
 	{ "dig", "The Dig Data", kGenUnchanged, UNK_LANG, Common::kPlatformMacintosh, 0 },
 	{ "dig", "The Dig Demo Data", kGenUnchanged, UNK_LANG, Common::kPlatformMacintosh, "Demo" },
diff --git a/engines/scumm/file.cpp b/engines/scumm/file.cpp
index 9c161ff1cc..21b0e594bf 100644
--- a/engines/scumm/file.cpp
+++ b/engines/scumm/file.cpp
@@ -29,6 +29,22 @@
 
 namespace Scumm {
 
+// The following table includes all the index files, which are embedded in the
+// main game executables in Steam versions.
+const SteamIndexFile steamIndexFiles[] = {
+	{ GID_INDY3, Common::kPlatformWindows,   "%02d.LFL",      "00.LFL",       "Indiana Jones and the Last Crusade.exe",     162056,  6295 },
+	{ GID_INDY3, Common::kPlatformMacintosh, "%02d.LFL",      "00.LFL",       "The Last Crusade",                           150368,  6295 },
+	{ GID_INDY4, Common::kPlatformWindows,   "atlantis.%03d", "ATLANTIS.000",  "Indiana Jones and the Fate of Atlantis.exe", 224336, 12035 },
+	{ GID_INDY4, Common::kPlatformMacintosh, "atlantis.%03d", "ATLANTIS.000",  "The Fate of Atlantis",                       260224, 12035 },
+	{ GID_LOOM,  Common::kPlatformWindows,   "%03d.LFL",      "000.LFL",       "Loom.exe",                                   187248,  8307 },
+	{ GID_LOOM,  Common::kPlatformMacintosh, "%03d.LFL",      "000.LFL",       "Loom",                                       170464,  8307 },
+#ifdef ENABLE_SCUMM_7_8
+	{ GID_DIG,   Common::kPlatformWindows,   "dig.la%d",      "DIG.LA0",       "The Dig.exe",                                340632, 16304 },
+	{ GID_DIG,   Common::kPlatformMacintosh, "dig.la%d",      "DIG.LA0",       "The Dig",                                    339744, 16304 },
+#endif
+	{ 0,         Common::kPlatformUnknown,   "",              "",              "",                                                0,     0 }
+};
+
 #pragma mark -
 #pragma mark --- ScummFile ---
 #pragma mark -
@@ -185,6 +201,29 @@ uint32 ScummFile::read(void *dataPtr, uint32 dataSize) {
 }
 
 #pragma mark -
+#pragma mark --- ScummSteamFile ---
+#pragma mark -
+bool ScummSteamFile::open(const Common::String &filename) {
+	for (const SteamIndexFile *indexFile = steamIndexFiles; indexFile->len; ++indexFile) {
+		if (indexFile->id == _steamGame.id && indexFile->platform == _steamGame.platform && filename.equalsIgnoreCase(indexFile->indexFileName))
+			return openWithSubRange(indexFile->executableName, indexFile->start, indexFile->len);
+	}
+
+	// Regular non-bundled file
+	return ScummFile::open(filename);
+}
+
+bool ScummSteamFile::openWithSubRange(const Common::String &filename, int32 subFileStart, int32 subFileLen) {
+	if (ScummFile::open(filename)) {
+		_subFileStart = subFileStart;
+		_subFileLen = subFileLen;
+		seek(0, SEEK_SET);
+		return true;
+	} else
+		return false;
+}
+
+#pragma mark -
 #pragma mark --- ScummDiskImage ---
 #pragma mark -
 
diff --git a/engines/scumm/file.h b/engines/scumm/file.h
index d6dbc06ddc..f3eaac5d32 100644
--- a/engines/scumm/file.h
+++ b/engines/scumm/file.h
@@ -53,7 +53,7 @@ public:
 };
 
 class ScummFile : public BaseScummFile {
-private:
+protected:
 	int32	_subFileStart;
 	int32	_subFileLen;
 	bool	_myEos; // Have we read past the end of the subfile?
@@ -64,7 +64,7 @@ private:
 public:
 	ScummFile();
 
-	bool open(const Common::String &filename);
+	virtual bool open(const Common::String &filename);
 	bool openSubFile(const Common::String &filename);
 
 	void clearErr() { _myEos = false; BaseScummFile::clearErr(); }
@@ -76,6 +76,18 @@ public:
 	uint32 read(void *dataPtr, uint32 dataSize);
 };
 
+class ScummSteamFile : public ScummFile {
+private:
+	GameSettings _steamGame;
+
+	bool openWithSubRange(const Common::String &filename, int32 subFileStart, int32 subFileLen);
+
+public:
+	ScummSteamFile(GameSettings game) : ScummFile(), _steamGame(game) {}
+
+	bool open(const Common::String &filename);
+};
+
 class ScummDiskImage : public BaseScummFile {
 private:
 	Common::SeekableReadStream *_stream;
@@ -120,6 +132,18 @@ public:
 	uint32 read(void *dataPtr, uint32 dataSize);
 };
 
+struct SteamIndexFile {
+	byte id;
+	Common::Platform platform;
+	const char *pattern;
+	const char *indexFileName;
+	const char *executableName;
+	int32 start;
+	int32 len;
+};
+
+extern const SteamIndexFile steamIndexFiles[];
+
 } // End of namespace Scumm
 
 #endif
diff --git a/engines/scumm/scumm-md5.h b/engines/scumm/scumm-md5.h
index 8accf39129..0eeff57ff7 100644
--- a/engines/scumm/scumm-md5.h
+++ b/engines/scumm/scumm-md5.h
@@ -1,5 +1,5 @@
 /*
-  This file was generated by the md5table tool on Wed Jun 25 09:07:50 2014
+  This file was generated by the md5table tool on Wed Jun 25 10:34:07 2014
   DO NOT EDIT MANUALLY!
  */
 
@@ -17,6 +17,7 @@ static const MD5Table md5table[] = {
 	{ "008e76ec3ae58d0add637ea7aa299a2c", "freddi3", "", "", -1, Common::FR_FRA, Common::kPlatformMacintosh },
 	{ "02cae0e7ff8504f73618391873d5781a", "freddi3", "HE 98.5", "", -1, Common::DE_DEU, Common::kPlatformWindows },
 	{ "0305e850382b812fec6e5998ef88a966", "pajama", "", "Demo", -1, Common::NL_NLD, Common::kPlatformUnknown },
+	{ "0354ee0d14cde1264ec762261c04c14a", "loom", "Steam", "Steam", 585728, Common::EN_ANY, Common::kPlatformWindows },
 	{ "035deab53b47bc43abc763560d0f8d4b", "atlantis", "Floppy", "Demo", -1, Common::EN_ANY, Common::kPlatformDOS },
 	{ "037385a953789190298494d92b89b3d0", "catalog", "HE 72", "Demo", -1, Common::EN_ANY, Common::kPlatformWindows },
 	{ "03d3b18ee3fd68114e2a687c871e38d5", "freddi4", "HE 99", "Mini Game", -1, Common::EN_USA, Common::kPlatformWindows },
@@ -299,6 +300,7 @@ static const MD5Table md5table[] = {
 	{ "69ffe29185b8d71f09f6199f8b2a87cb", "lost", "HE 100", "", -1, Common::RU_RUS, Common::kPlatformWindows },
 	{ "6a30a07f353a75cdc602db27d73e1b42", "puttputt", "HE 70", "", -1, Common::EN_ANY, Common::kPlatformWindows },
 	{ "6a60d395b78b205c93a956100b1bf5ae", "pajama2", "HE 98.5", "", -1, Common::DE_DEU, Common::kPlatformUnknown },
+	{ "6a8133b63d46f6663fbcbb49d5a2edb1", "atlantis", "Steam", "Steam", 520548, Common::EN_ANY, Common::kPlatformMacintosh },
 	{ "6af2419fe3db5c2fdb091ae4e5833770", "puttrace", "HE 98.5", "Demo", -1, Common::NL_NLD, Common::kPlatformUnknown },
 	{ "6b19d0e25cbf720d05822379b8b90ed9", "PuttTime", "HE 90", "Demo", -1, Common::NL_NLD, Common::kPlatformUnknown },
 	{ "6b257bb2827dd894b8109a50a1a18b5a", "freddicove", "HE 100", "Demo", -1, Common::NL_NLD, Common::kPlatformUnknown },
@@ -357,6 +359,7 @@ static const MD5Table md5table[] = {
 	{ "7edd665bbede7ea8b7233f8e650be6f8", "samnmax", "", "CD", -1, Common::FR_FRA, Common::kPlatformUnknown },
 	{ "7f45ddd6dbfbf8f80c0c0efea4c295bc", "maniac", "V1", "V1", 1972, Common::EN_ANY, Common::kPlatformDOS },
 	{ "7f945525abcd48015adf1632637a44a1", "pajama", "", "Demo", -1, Common::FR_FRA, Common::kPlatformUnknown },
+	{ "7fbcff27c323499beaedd605e1ebd47d", "indy3", "Steam", "Steam", 561152, Common::EN_ANY, Common::kPlatformWindows },
 	{ "7fc6cdb46b4c9d384c52327f4bca6416", "football", "", "", -1, Common::EN_ANY, Common::kPlatformUnknown },
 	{ "810a9da887aefa597b0cf3c77d262897", "BluesABCTime", "", "Demo", -1, Common::EN_ANY, Common::kPlatformUnknown },
 	{ "822807c3cd3b43a925cab2767ca6b453", "BluesTreasureHunt", "", "Disc 1", -1, Common::EN_ANY, Common::kPlatformUnknown },
@@ -439,6 +442,7 @@ static const MD5Table md5table[] = {
 	{ "a095616d2d23ccf43b8e257711202cba", "football2002", "", "", -1, Common::EN_ANY, Common::kPlatformUnknown },
 	{ "a095e33061606d231ff37dca4c64c8ac", "pajama", "HE 99", "", -1, Common::DE_DEU, Common::kPlatformUnknown },
 	{ "a0a7dea72003933b8b3f8b99b9f7ddeb", "loom", "No AdLib", "EGA", -1, Common::EN_ANY, Common::kPlatformAtariST },
+	{ "a15d6e1e2c52bbd0ff7fa6b63ab7f796", "indy3", "Steam", "Steam", 680340, Common::EN_ANY, Common::kPlatformMacintosh },
 	{ "a194f15f51ee62badab74b9e7da97693", "baseball2001", "", "Demo", 20507, Common::EN_ANY, Common::kPlatformUnknown },
 	{ "a197a87ae77f3b3333f09a7a2c448fe2", "freddi", "HE 99", "Updated", -1, Common::EN_ANY, Common::kPlatformWindows },
 	{ "a22af0ad0e3126d19d22707b0267a37d", "balloon", "HE 80", "", -1, Common::NL_NLD, Common::kPlatformWindows },
@@ -467,6 +471,7 @@ static const MD5Table md5table[] = {
 	{ "aa8a0cb65f3afbbe2c14c3f9f92775a3", "monkey", "CD", "CD", 8955, Common::FR_FRA, Common::kPlatformDOS },
 	{ "aaa587701cde7e74692c68c1024b85eb", "puttrace", "HE 99", "Demo", -1, Common::NL_NLD, Common::kPlatformUnknown },
 	{ "aaa7f36a253f277dd29dd1c051b0e4b9", "indy3", "No AdLib", "EGA", -1, Common::DE_DEU, Common::kPlatformAtariST },
+	{ "aad201302286c1cfee92321cd406e427", "dig", "Steam", "Steam", 811008, Common::EN_ANY, Common::kPlatformWindows },
 	{ "ab0693e9324cfcf498fdcbb12acf8bb4", "puttcircus", "", "", -1, Common::EN_ANY, Common::kPlatformUnknown },
 	{ "ac1642b6edfb8521ca03760126f1c250", "tentacle", "", "Demo", -1, Common::DE_DEU, Common::kPlatformDOS },
 	{ "ac62d50e39492ee3738b4e83a5ac780f", "freddi2", "HE 80", "", -1, Common::NL_NLD, Common::kPlatformWindows },
@@ -480,6 +485,7 @@ static const MD5Table md5table[] = {
 	{ "b250d0f9cc83f80ced56fe11a4fb057c", "maniac", "V2", "V2", 1988, Common::EN_ANY, Common::kPlatformDOS },
 	{ "b289a2a8cbedbf45786e0b4ad2f510f1", "samnmax", "Floppy", "Floppy", -1, Common::IT_ITA, Common::kPlatformDOS },
 	{ "b47be81e39a9710f6f595f7b527b60f8", "puttrace", "HE 99", "", -1, Common::EN_GRB, Common::kPlatformWindows },
+	{ "b4a677bf27c010a747975705108ff1e6", "loom", "Steam", "Steam", 393572, Common::EN_ANY, Common::kPlatformMacintosh },
 	{ "b5298a5c15ffbe8b381d51ea4e26d35c", "freddi4", "HE 99", "", -1, Common::DE_DEU, Common::kPlatformUnknown },
 	{ "b597e0403cc0002f69170e6caba7edd9", "indy3", "EGA", "EGA Demo", 5361, Common::EN_ANY, Common::kPlatformDOS },
 	{ "b628506f7def772e40de0aa5440fb8e1", "activity", "HE 70", "", -1, Common::EN_ANY, Common::kPlatformWindows },
@@ -569,6 +575,7 @@ static const MD5Table md5table[] = {
 	{ "d7b247c26bf1f01f8f7daf142be84de3", "balloon", "HE 99", "Updated", -1, Common::EN_ANY, Common::kPlatformWindows },
 	{ "d8323015ecb8b10bf53474f6e6b0ae33", "dig", "", "", 16304, Common::UNK_LANG, Common::kPlatformUnknown },
 	{ "d917f311a448e3cc7239c31bddb00dd2", "samnmax", "", "CD", 9080, Common::EN_ANY, Common::kPlatformUnknown },
+	{ "d93cc8be628ed5d3b3a29188fc7105d3", "dig", "Steam", "Steam", 1061296, Common::EN_ANY, Common::kPlatformMacintosh },
 	{ "d9d0dd93d16ab4dec55cabc2b86bbd17", "samnmax", "", "Demo", 6478, Common::EN_ANY, Common::kPlatformDOS },
 	{ "da09e666fc8f5b78d7b0ac65d1a3b56e", "monkey2", "FM-TOWNS", "", 11135, Common::EN_ANY, Common::kPlatformFMTowns },
 	{ "da6269b18fcb08189c0aa9c95533cce2", "monkey", "CD", "CD", 8955, Common::IT_ITA, Common::kPlatformDOS },
@@ -629,6 +636,7 @@ static const MD5Table md5table[] = {
 	{ "f237bf8a5ef9af78b2a6a4f3901da341", "pajama", "", "Demo", 18354, Common::EN_ANY, Common::kPlatformUnknown },
 	{ "f27b1ba0eadaf2a6617b2b58192d1dbf", "samnmax", "Floppy", "Floppy", -1, Common::DE_DEU, Common::kPlatformDOS },
 	{ "f2ec78e50bdc63b70044e9758be10914", "spyfox", "HE 98.5", "Demo", -1, Common::NL_NLD, Common::kPlatformMacintosh },
+	{ "f3c5d9bf3f091bd1f18dc1013fba5396", "atlantis", "Steam", "Steam", 638976, Common::EN_ANY, Common::kPlatformWindows },
 	{ "f3d55aea441e260e9e9c7d2a187097e0", "puttzoo", "", "Demo", 14337, Common::EN_ANY, Common::kPlatformWindows },
 	{ "f40a7f495f59188ca57a9d1d50301bb6", "puttputt", "HE 60", "Demo", -1, Common::EN_ANY, Common::kPlatformMacintosh },
 	{ "f5228b0cc1c19e6ea8268ba2eeb61f60", "freddi", "HE 73", "Demo", -1, Common::FR_FRA, Common::kPlatformWindows },
diff --git a/engines/scumm/scumm.cpp b/engines/scumm/scumm.cpp
index 34c231e5d4..8c0325934d 100644
--- a/engines/scumm/scumm.cpp
+++ b/engines/scumm/scumm.cpp
@@ -1026,6 +1026,35 @@ Common::Error ScummEngine::init() {
 	}
 #endif
 
+	// Extra directories needed for the Steam versions
+	if (_filenamePattern.genMethod == kGenDiskNumSteam || _filenamePattern.genMethod == kGenRoomNumSteam) {
+		if (_game.platform == Common::kPlatformWindows) {
+			switch (_game.id) {
+			case GID_INDY3 :
+				SearchMan.addSubDirectoryMatching(gameDataDir, "indy3");
+				break;
+			case GID_INDY4 :
+				SearchMan.addSubDirectoryMatching(gameDataDir, "atlantis");
+				break;
+			case GID_LOOM :
+				SearchMan.addSubDirectoryMatching(gameDataDir, "loom");
+				break;
+#ifdef ENABLE_SCUMM_7_8
+			case GID_DIG :
+				SearchMan.addSubDirectoryMatching(gameDataDir, "dig");
+				SearchMan.addSubDirectoryMatching(gameDataDir, "dig/video");
+				break;
+#endif
+			default:
+				break;
+			}
+		} else {
+			SearchMan.addSubDirectoryMatching(gameDataDir, "Contents");
+			SearchMan.addSubDirectoryMatching(gameDataDir, "Contents/MacOS");
+			SearchMan.addSubDirectoryMatching(gameDataDir, "Contents/Resources");
+			SearchMan.addSubDirectoryMatching(gameDataDir, "Contents/Resources/video");
+		}
+	}
 
 	// The	kGenUnchanged method is only used for 'container files', i.e. files
 	// that contain the real game files bundled together in an archive format.
@@ -1126,15 +1155,25 @@ Common::Error ScummEngine::init() {
 				error("Couldn't find known subfile inside container file '%s'", _containerFile.c_str());
 
 			_fileHandle->close();
-
 		} else {
 			error("kGenUnchanged used with unsupported platform");
 		}
 	} else {
-		// Regular access, no container file involved
-		_fileHandle = new ScummFile();
+		if (_filenamePattern.genMethod == kGenDiskNumSteam || _filenamePattern.genMethod == kGenRoomNumSteam) {
+			// Steam game versions have the index file embedded in the main executable
+			_fileHandle = new ScummSteamFile(_game);
+		} else {
+			// Regular access, no container file involved
+			_fileHandle = new ScummFile();
+		}
 	}
 
+	// Steam Win and Mac versions share the same DOS data files. We show Windows or Mac
+	// for the platform the detector, but internally we force the platform to DOS, so that
+	// the code for handling the original DOS data files is used.
+	if (_filenamePattern.genMethod == kGenDiskNumSteam || _filenamePattern.genMethod == kGenRoomNumSteam)
+		_game.platform = Common::kPlatformDOS;
+
 	// Load CJK font, if present
 	// Load it earlier so _useCJKMode variable could be set
 	loadCJKFont();
@@ -1218,7 +1257,7 @@ Common::Error ScummEngine::init() {
 
 void ScummEngine::setupScumm() {
 	// On some systems it's not safe to run CD audio games from the CD.
-	if (_game.features & GF_AUDIOTRACKS) {
+	if (_game.features & GF_AUDIOTRACKS && !Common::File::exists("CDDA.SOU")) {
 		checkCD();
 
 		int cd_num = ConfMan.getInt("cdrom");