SCI: kAddToPic(list) set fixed priority flag

svn-id: r51954

2 files changed, 15 insertions, 3 deletions

diff --git a/engines/sci/graphics/animate.cpp b/engines/sci/graphics/animate.cpp
index 1e9beab607..913b369790 100644
--- a/engines/sci/graphics/animate.cpp
+++ b/engines/sci/graphics/animate.cpp
@@ -518,6 +518,19 @@ void GfxAnimate::reAnimate(Common::Rect rect) {
 	}
 }
 
+void GfxAnimate::preprocessAddToPicList() {
+	AnimateList::iterator it;
+	const AnimateList::iterator end = _list.end();
+
+	for (it = _list.begin(); it != end; ++it) {
+		if (it->priority == -1)
+			it->priority = _ports->kernelCoordinateToPriority(it->y);
+
+		// Do not allow priority to get changed by fill()
+		it->signal |= kSignalFixedPriority;
+	}
+}
+
 void GfxAnimate::addToPicDrawCels() {
 	reg_t curObject;
 	GfxView *view = NULL;
@@ -527,9 +540,6 @@ void GfxAnimate::addToPicDrawCels() {
 	for (it = _list.begin(); it != end; ++it) {
 		curObject = it->object;
 
-		if (it->priority == -1)
-			it->priority = _ports->kernelCoordinateToPriority(it->y);
-
 		// Get the corresponding view
 		view = _cache->getView(it->viewId);
 
@@ -687,6 +697,7 @@ void GfxAnimate::kernelAddToPicList(reg_t listReference, int argc, reg_t *argv)
 		error("kAddToPic called with non-list as parameter");
 
 	makeSortedList(list);
+	preprocessAddToPicList();
 	fill(tempPicNotValid);
 	addToPicDrawCels();
 
diff --git a/engines/sci/graphics/animate.h b/engines/sci/graphics/animate.h
index 7e82187eed..c2101e5384 100644
--- a/engines/sci/graphics/animate.h
+++ b/engines/sci/graphics/animate.h
@@ -100,6 +100,7 @@ public:
 	void updateScreen(byte oldPicNotValid);
 	void restoreAndDelete(int argc, reg_t *argv);
 	void reAnimate(Common::Rect rect);
+	void preprocessAddToPicList();
 	void addToPicDrawCels();
 	void addToPicDrawView(GuiResourceId viewId, int16 loopNo, int16 celNo, int16 leftPos, int16 topPos, int16 priority, int16 control);