LAB: Add support for the Wyrmkeep Windows trial version

Only the trial part of this version can be played in ScummVM, since we
can't check for game payment status

5 files changed, 57 insertions, 38 deletions

diff --git a/engines/lab/detection.cpp b/engines/lab/detection.cpp
index 2b1bb21205..1da269ecad 100644
--- a/engines/lab/detection.cpp
+++ b/engines/lab/detection.cpp
@@ -120,7 +120,7 @@ Common::Platform LabEngine::getPlatform() const {
 }
 
 uint32 LabEngine::getFeatures() const {
-	return _gameDescription->flags;
+	return _gameDescription->flags | _extraGameFeatures;
 }
 
 } // End of namespace Lab
diff --git a/engines/lab/lab.cpp b/engines/lab/lab.cpp
index 563ccefa84..f1d0fe96c4 100644
--- a/engines/lab/lab.cpp
+++ b/engines/lab/lab.cpp
@@ -36,6 +36,8 @@
 
 #include "engines/util.h"
 
+#include "gui/message.h"
+
 #include "lab/lab.h"
 #include "lab/labfun.h"
 
@@ -46,7 +48,7 @@ namespace Lab {
 LabEngine *g_lab;
 
 LabEngine::LabEngine(OSystem *syst, const ADGameDescription *gameDesc)
- : Engine(syst), _gameDescription(gameDesc) {
+ : Engine(syst), _gameDescription(gameDesc), _extraGameFeatures(0) {
 	g_lab = this;
 }
 
@@ -63,6 +65,40 @@ Common::Error LabEngine::run() {
 
 	g_music = new Music();
 
+	if (getPlatform() == Common::kPlatformWindows) {
+		// Check if this is the Wyrmkeep trial
+		Common::File roomFile;
+		bool knownVersion = true;
+		bool roomFileOpened = roomFile.open("game/rooms/48");
+
+		if (!roomFileOpened)
+			knownVersion = false;
+		else if (roomFile.size() != 892)
+			knownVersion = false;
+		else {
+			roomFile.seek(352);
+			byte checkByte = roomFile.readByte();
+			if (checkByte == 0x00) {
+				// Full Windows version
+			} else if (checkByte == 0x80) {
+				// Wyrmkeep trial version
+				_extraGameFeatures = GF_WINDOWS_TRIAL;
+
+				GUI::MessageDialog trialMessage("This is a trial Windows version of the game. To play the full version, you will need to use the original interpreter and purchase a key from Wyrmkeep");
+				trialMessage.runModal();
+			} else {
+				knownVersion = false;
+			}
+			
+			roomFile.close();
+
+			if (!knownVersion) {
+				warning("Unknown Windows version found, please report this version to the ScummVM team");
+				return Common::kNoGameDataFoundError;
+			}
+		}
+	}
+
 	go();
 
 	return Common::kNoError;
diff --git a/engines/lab/lab.h b/engines/lab/lab.h
index fa5edd6c24..b16b5981b3 100644
--- a/engines/lab/lab.h
+++ b/engines/lab/lab.h
@@ -41,7 +41,8 @@ struct ADGameDescription;
 namespace Lab {
 
 enum GameFeatures {
-        GF_LOWRES = 1 << 0
+	GF_LOWRES = 1 << 0,
+	GF_WINDOWS_TRIAL = 1 << 1
 };
 
 class LabEngine : public Engine {
@@ -60,6 +61,9 @@ public:
 	Common::String generateSaveFileName(uint slot);
 
 	LargeSet *_conditions, *_roomsFound;
+
+private:
+	uint32 _extraGameFeatures;
 };
 
 extern LabEngine *g_lab;
diff --git a/engines/lab/processroom.cpp b/engines/lab/processroom.cpp
index 54d7605d15..27d480bf69 100644
--- a/engines/lab/processroom.cpp
+++ b/engines/lab/processroom.cpp
@@ -28,6 +28,8 @@
  *
  */
 
+#include "gui/message.h"
+
 #include "lab/lab.h"
 #include "lab/stddefines.h"
 #include "lab/labfun.h"
@@ -40,10 +42,6 @@
 
 namespace Lab {
 
-#ifdef GAME_TRIAL
-extern int g_IsRegistered;
-#endif
-
 /* Global parser data */
 
 RoomData *Rooms;
@@ -519,30 +517,16 @@ static void doActions(ActionPtr APtr, CloseDataPtr *LCPtr) {
 			}
 
 #endif
-#if defined(GAME_TRIAL)
-
-			if (APtr->Param1 & 0x8000) { // check registration if high-bit set
-				if (!g_IsRegistered) {
-					extern int trialCheckInGame();
-					int result;
-
-					// Time to pay up!
-					result = trialCheckInGame();
-
-					CurFileName = getPictName(LCPtr);
-					readPict(CurFileName, true);
-
-					if (!g_IsRegistered) {
-						APtr = NULL;
-						continue;
-					}
-				}
-
-				// fix-up data
-				APtr->Param1 &= 0x7fff; // clear high-bit
+			if (APtr->Param1 & 0x8000) {
+				// This is a Wyrmkeep Windows trial version, thus stop at this
+				// point, since we can't check for game payment status
+				readPict(getPictName(LCPtr), true);
+				APtr = NULL;
+				GUI::MessageDialog trialMessage("This is the end of the trial version. You can play the full game using the original interpreter from Wyrmkeep");
+				trialMessage.runModal();
+				continue;
 			}
 
-#endif
 			RoomNum   = APtr->Param1;
 			Direction = APtr->Param2 - 1;
 			*LCPtr      = NULL;
diff --git a/engines/lab/special.cpp b/engines/lab/special.cpp
index 7d2212138b..74625a63f4 100644
--- a/engines/lab/special.cpp
+++ b/engines/lab/special.cpp
@@ -47,10 +47,6 @@
 
 namespace Lab {
 
-#ifdef GAME_TRIAL
-int g_IsRegistered;
-#endif
-
 extern bool nopalchange, DoBlack, IsHiRes;
 
 extern BitMap *DispBitMap, *DrawBitMap;
@@ -450,12 +446,11 @@ static void changeTile(uint16 col, uint16 row) {
 		return;
 #endif
 
-#if defined(GAME_TRIAL)
-
-		if (!g_IsRegistered)
+		if (g_lab->getFeatures() & GF_WINDOWS_TRIAL) {
+			GUI::MessageDialog trialMessage("This puzzle is not available in the trial version of the game");
+			trialMessage.runModal();
 			return;
-
-#endif
+		}
 
 		check = true;
 		row   = 0;