tinsel: workaround for "missing red dragon in Act IV" bug in Discworld PSX

svn-id: r41068

1 files changed, 14 insertions, 1 deletions

diff --git a/engines/tinsel/tinsel.cpp b/engines/tinsel/tinsel.cpp
index cdd6f1ffb7..47602b5862 100644
--- a/engines/tinsel/tinsel.cpp
+++ b/engines/tinsel/tinsel.cpp
@@ -521,6 +521,19 @@ void SetNewScene(SCNHANDLE scene, int entrance, int transition) {
 
 		HookScene.scene = 0;
 	}
+
+	// Workaround for "Missing Red Dragon in square" bug in Discworld 1 PSX, act IV.
+	// This happens with the original interpreter on PSX too: the red dragon in Act IV 
+	// doesn't show up inside the square at the right time. Original game required the
+	// player to go in and out the square until the dragon appears (wasting hours).
+	// I'm forcing the load of the right scene by checking that the player has (or has not) the
+	// right items: player must have Mambo the swamp dragon, and mustn't have fireworks (used on
+	// the swamp dragon previously to "load it up").
+	if (TinselV1PSX && NextScene.scene == 0x1800000 && NextScene.entry == 2) {
+		if ((IsInInventory(261, INV_1) || IsInInventory(261, INV_2)) && 
+			(!IsInInventory(232, INV_1) && !IsInInventory(232, INV_2)))
+			NextScene.entry = 1;
+	}
 }
 
 /**
@@ -672,7 +685,7 @@ bool ChangeScene(bool bReset) {
 		} else if (--CountOut == 0) {
 			if (!TinselV2)
 				ClearScreen();
-
+		
 			StartNewScene(NextScene.scene, NextScene.entry);
 			NextScene.scene = 0;