sdl.ext.get_events() incorrectly handles more than 10 events
When sdl.ext.get_events() is called, it tries to get the first 10 events off of the queue. If it does get 10 events, it tries to grab another ten. However, because it's using a pointer to the same array as the first call to store the results, any events found in the subsequent calls to SDL_PeepEvent overwrite the events found in the previous calls. Thus, if the events were numbered in the order that they are listed in the queue, you should see a list with the results of...
...but instead you would see..
This problem can be duplicated using the following code:
import sdl3 as sdl import sdl2.ext as sdlext sdl.SDL_Init(sdl.SDL_INIT_VIDEO) # Clear all items from the event queue that might have happened when SDL started. sdl.SDL_FlushEvent(sdl.SDL_FIRSTEVENT, sdl.SDL_LASTEVENT) # Add a bunch of different events, at least 11 to duplicate issue for x in range(12): event = sdl.SDL_Event() event.type = sdl.SDL_USEREVENT + x event.user = sdl.SDL_UserEvent(type=event.type, timestamp=0, windowID=0, code=0) sdl.SDL_PushEvent(event) results = sdlext.get_events() # This asserion should pass, as the first event we push is USEREVENT + 0, but it fails. types_found = [x.type for x in results] assert sdl.SDL_USEREVENT in types_found
A corrected version of get_events is shown below:
def get_events(): """Gets all SDL events that are currently on the event queue.""" events.SDL_PumpEvents() evlist =  SDL_PeepEvents = events.SDL_PeepEvents op = events.SDL_GETEVENT first = events.SDL_FIRSTEVENT last = events.SDL_LASTEVENT while True: evarray = (events.SDL_Event * 10)() ptr = ctypes.cast(evarray, ctypes.POINTER(events.SDL_Event)) ret = SDL_PeepEvents(ptr, 10, op, first, last) if not ret: break evlist += list(evarray)[:ret] return evlist