1 files changed, 60 insertions, 0 deletions

diff --git a/engines/sci/engine/features.h b/engines/sci/engine/features.h
index 1c410267e6..36b0d06360 100644
--- a/engines/sci/engine/features.h
+++ b/engines/sci/engine/features.h
@@ -34,6 +34,12 @@ enum MoveCountType {
 	kIncrementMoveCount
 };
 
+enum PseudoMouseAbilityType {
+	kPseudoMouseAbilityUninitialized,
+	kPseudoMouseAbilityFalse,
+	kPseudoMouseAbilityTrue
+};
+
 class GameFeatures {
 public:
 	GameFeatures(SegManager *segMan, Kernel *kernel);
@@ -76,6 +82,52 @@ public:
 	 * @return Graphics functions type, SCI_VERSION_2 / SCI_VERSION_2_1
 	 */
 	SciVersion detectSci21KernelType();
+
+	inline bool usesModifiedAudioAttenuation() const {
+		switch (g_sci->getGameId()) {
+		// Assuming MGDX uses modified attenuation since SQ6 does and it was
+		// released earlier, but not verified (Phar Lap Windows-only release)
+		case GID_MOTHERGOOSEHIRES:
+		case GID_PQ4:
+		case GID_SQ6:
+			return true;
+		case GID_KQ7:
+		case GID_QFG4:
+			// (1) KQ7 1.51 (SCI2.1early) uses the non-standard attenuation, but
+			// 2.00b (SCI2.1mid) does not
+			// (2) QFG4 CD is SCI2.1early; QFG4 floppy is SCI2 and does not use
+			// the SCI2.1 audio system
+			return getSciVersion() == SCI_VERSION_2_1_EARLY;
+		default:
+			return false;
+		}
+	}
+
+	inline bool hasTransparentPicturePlanes() const {
+		const SciGameId &gid = g_sci->getGameId();
+
+		// NOTE: MGDX is assumed to not have transparent picture planes since it
+		// was released before SQ6, but this has not been verified since it
+		// cannot be disassembled at the moment (Phar Lap Windows-only release)
+		return getSciVersion() >= SCI_VERSION_2_1_MIDDLE &&
+			gid != GID_SQ6 &&
+			gid != GID_MOTHERGOOSEHIRES;
+	}
+
+	inline bool hasNewPaletteCode() const {
+		return getSciVersion() >= SCI_VERSION_2_1_MIDDLE || g_sci->getGameId() == GID_KQ7;
+	}
+
+	inline bool VMDOpenStopsAudio() const {
+		// Of the games that use VMDs:
+		// Yes: Phant1, Shivers, Torin
+		// No: SQ6
+		// TODO: Optional extra flag to kPlayVMD which defaults to Yes: PQ:SWAT
+		// TODO: SCI3, GK2 (GK2's VMD code is closer to SCI3 than SCI21)
+		return getSciVersion() == SCI_VERSION_2_1_MIDDLE &&
+			g_sci->getGameId() != GID_SQ6 &&
+			g_sci->getGameId() != GID_GK2;
+	}
 #endif
 
 	/**
@@ -110,6 +162,12 @@ public:
 	 */
 	void forceDOSTracks() { _forceDOSTracks = true; }
 
+	/**
+	 * Autodetects, if Pseudo Mouse ability is enabled (different behavior in keyboard driver)
+	 * @return kPseudoMouseAbilityTrue or kPseudoMouseAbilityFalse
+	 */
+	PseudoMouseAbilityType detectPseudoMouseAbility();
+
 private:
 	reg_t getDetectionAddr(const Common::String &objName, Selector slc, int methodNum = -1);
 
@@ -130,6 +188,8 @@ private:
 	bool _usesCdTrack;
 	bool _forceDOSTracks;
 
+	PseudoMouseAbilityType _pseudoMouseAbility;
+
 	SegManager *_segMan;
 	Kernel *_kernel;
 };