SCI: Fix pseudo mouse in various SCI1 games like e.g. Larry5

Pseudo mouse was functionality in SCI1+ games, that allowed the
user to control the mouse via keyboard cursor keys.

This new class only worked, when a tiny difference inside
the keyboard driver happened on kMapKeyToDir calls. We previously
tried to enable this behavior depending on cursor type, but
this didn't work correctly (Larry 5 for example was not detected
as such, but had PseudoMouse support).

1 files changed, 14 insertions, 0 deletions

diff --git a/engines/sci/engine/features.h b/engines/sci/engine/features.h
index 1c410267e6..b2d40f400f 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);
@@ -110,6 +116,12 @@ 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 +142,8 @@ private:
 	bool _usesCdTrack;
 	bool _forceDOSTracks;
 
+	PseudoMouseAbilityType _pseudoMouseAbility;
+
 	SegManager *_segMan;
 	Kernel *_kernel;
 };