SCI: support kSetCursorSci11(-2)

svn-id: r51202

3 files changed, 36 insertions, 22 deletions

diff --git a/engines/sci/engine/kgraphics.cpp b/engines/sci/engine/kgraphics.cpp
index 55d0de8261..ed7b72f90b 100644
--- a/engines/sci/engine/kgraphics.cpp
+++ b/engines/sci/engine/kgraphics.cpp
@@ -129,9 +129,10 @@ static reg_t kSetCursorSci11(EngineState *s, int argc, reg_t *argv) {
 			break;
 		case -1:
 			// TODO: Special case at least in kq6, check disassembly
+			//  Does something with magCursor, which is set on argc = 10, which we don't support
 			break;
 		case -2:
-			// TODO: Special case at least in kq6, check disassembly
+			g_sci->_gfxCursor->kernelResetMoveZone();
 			break;
 		default:
 			g_sci->_gfxCursor->kernelShow();
diff --git a/engines/sci/graphics/cursor.cpp b/engines/sci/graphics/cursor.cpp
index e1c05c97da..f6e2077cb3 100644
--- a/engines/sci/graphics/cursor.cpp
+++ b/engines/sci/graphics/cursor.cpp
@@ -47,7 +47,7 @@ GfxCursor::GfxCursor(ResourceManager *resMan, GfxPalette *palette, GfxScreen *sc
 
 	// center mouse cursor
 	setPosition(Common::Point(_screen->getWidth() / 2, _screen->getHeight() / 2));
-	kernelSetMoveZone(Common::Rect(0, 0, _screen->getDisplayWidth(), _screen->getDisplayHeight()));
+	_moveZoneActive = false;
 }
 
 GfxCursor::~GfxCursor() {
@@ -283,32 +283,39 @@ Common::Point GfxCursor::getPosition() {
 }
 
 void GfxCursor::refreshPosition() {
-	bool clipped = false;
-	Common::Point mousePoint = getPosition();
-
-	if (mousePoint.x < _moveZone.left) {
-		mousePoint.x = _moveZone.left;
-		clipped = true;
-	} else if (mousePoint.x >= _moveZone.right) {
-		mousePoint.x = _moveZone.right - 1;
-		clipped = true;
-	}
+	if (_moveZoneActive) {
+		bool clipped = false;
+		Common::Point mousePoint = getPosition();
+
+		if (mousePoint.x < _moveZone.left) {
+			mousePoint.x = _moveZone.left;
+			clipped = true;
+		} else if (mousePoint.x >= _moveZone.right) {
+			mousePoint.x = _moveZone.right - 1;
+			clipped = true;
+		}
 
-	if (mousePoint.y < _moveZone.top) {
-		mousePoint.y = _moveZone.top;
-		clipped = true;
-	} else if (mousePoint.y >= _moveZone.bottom) {
-		mousePoint.y = _moveZone.bottom - 1;
-		clipped = true;
+		if (mousePoint.y < _moveZone.top) {
+			mousePoint.y = _moveZone.top;
+			clipped = true;
+		} else if (mousePoint.y >= _moveZone.bottom) {
+			mousePoint.y = _moveZone.bottom - 1;
+			clipped = true;
+		}
+
+		// FIXME: Do this only when mouse is grabbed?
+		if (clipped)
+			setPosition(mousePoint);
 	}
+}
 
-	// FIXME: Do this only when mouse is grabbed?
-	if (clipped)
-		setPosition(mousePoint);
+void GfxCursor::kernelResetMoveZone() {
+	_moveZoneActive = false;
 }
 
 void GfxCursor::kernelSetMoveZone(Common::Rect zone) {
-	 _moveZone = zone;
+	_moveZone = zone;
+	_moveZoneActive = true;
 }
 
 void GfxCursor::kernelSetPos(Common::Point pos) {
diff --git a/engines/sci/graphics/cursor.h b/engines/sci/graphics/cursor.h
index 7acd14acd9..787841f5be 100644
--- a/engines/sci/graphics/cursor.h
+++ b/engines/sci/graphics/cursor.h
@@ -58,6 +58,11 @@ public:
 	void refreshPosition();
 
 	/**
+	 * Removes limit for mouse movement
+	 */
+	void kernelResetMoveZone();
+
+	/**
 	 * Limits the mouse movement to a given rectangle.
 	 *
 	 * @param[in] rect	The rectangle
@@ -78,6 +83,7 @@ private:
 
 	int _upscaledHires;
 
+	bool _moveZoneActive;
 	Common::Rect _moveZone; // Rectangle in which the pointer can move
 
 	CursorCache _cachedCursors;