SCI32: Improve performance when flushing events during video playback

Calling through EventManager::getSciEvent to flush events is
pretty inefficient and created stalls that lead to dropped
frames during the chapter 7 chase in Phantasmagoria 1.

If necessary, performance could be improved further by extending
Common::EventManager to expose SDL_FlushEvents, but this seems to
finish in 0-1ms so should be OK for now.

Refs Trac#9974, Trac#9975.

1 files changed, 1 insertions, 0 deletions

diff --git a/engines/sci/event.h b/engines/sci/event.h
index b06d2ae429..614a5a64e7 100644
--- a/engines/sci/event.h
+++ b/engines/sci/event.h
@@ -138,6 +138,7 @@ public:
 
 	void updateScreen();
 	SciEvent getSciEvent(uint32 mask);
+	void flushEvents();
 
 private:
 	SciEvent getScummVMEvent();