SCI: kAnimate bit 2 is hoyle 4 exclusive

adjusted comments about that and also renamed the bit, also added additional TODO, because hoyle 4 has special code that gets into action, when bit 0 is not set, but bit 2 is

svn-id: r53853

2 files changed, 9 insertions, 13 deletions

diff --git a/engines/sci/graphics/animate.cpp b/engines/sci/graphics/animate.cpp
index 30329fa688..8aa6f5284f 100644
--- a/engines/sci/graphics/animate.cpp
+++ b/engines/sci/graphics/animate.cpp
@@ -286,16 +286,12 @@ void GfxAnimate::fill(byte &old_picNotValid) {
 			view->getCelRect(it->loopNo, it->celNo, it->x, it->y, it->z, it->celRect);
 		}
 
-		// This statement must be here for Hoyle4, otherwise cards are unclickable.
-		// This is probably one of the experimental features that were occasionally
-		// added to SCI interpreters; the corresponding check is absent in many SSCI
-		// versions. m_kiewitz knew about this flag before I (lskovlun) implemented it, 
-		// so it is possible that more test cases are known. Also, some presently open
-		// SCI1.1 bugs may be fixed by this and should be re-tested with this patch generalized.
-
-		// NOTE: *this* breaks at least eco quest 2. One should go through interpreters and check
-		//  the code before enabling it for more games (TODO)
-		if ((g_sci->getGameId() == GID_HOYLE4) && (it->scaleSignal & kScaleSignalDontSetNsrect))
+		// Checking for this bit must be here for Hoyle4, otherwise cards are unclickable.
+		//  This feature is not included in the other SCI1.1 interpreters and MUST NOT be
+		//  checked in those cases, otherwise we will break games (e.g. EcoQuest 2, room 200)
+		// TODO: hoyle 4 has different code inside kAnimate and even special code, when bit 0 is not
+		//  set, but bit 2 is
+		if ((g_sci->getGameId() == GID_HOYLE4) && (it->scaleSignal & kScaleSignalHoyle4DontSetNsrect))
 			setNsRect = false;
 
 		if (setNsRect) {
diff --git a/engines/sci/graphics/animate.h b/engines/sci/graphics/animate.h
index 12c8bd0643..04e6b36dcf 100644
--- a/engines/sci/graphics/animate.h
+++ b/engines/sci/graphics/animate.h
@@ -51,9 +51,9 @@ enum ViewSignals {
 };
 
 enum ViewScaleSignals {
-	kScaleSignalDoScaling		= 0x0001, // enables scaling when drawing that cel (involves scaleX and scaleY)
-	kScaleSignalGlobalScaling	= 0x0002, // means that global scaling shall get applied on that cel (sets scaleX/scaleY)
-	kScaleSignalDontSetNsrect	= 0x0004  // do not set nsRect inside kAnimate(); for a test case see bug #3038424 
+	kScaleSignalDoScaling			= 0x0001, // enables scaling when drawing that cel (involves scaleX and scaleY)
+	kScaleSignalGlobalScaling		= 0x0002, // means that global scaling shall get applied on that cel (sets scaleX/scaleY)
+	kScaleSignalHoyle4DontSetNsrect	= 0x0004  // HOYLE4-exclusive: do not set nsRect inside kAnimate(); for a test case see bug #3038424
 
 };