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Improve mouse batching to only batch if the last event was less than 1 millisecond ago

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This commit is contained in:
Cameron Gutman 2018-09-04 00:09:35 -07:00
commit 9a71b4c237
2 changed files with 14 additions and 4 deletions
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17
app/streaming/input.cpp
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@ -23,7 +23,8 @@ const int SdlInputHandler::k_ButtonMap[] = {
}; };
SdlInputHandler::SdlInputHandler(bool multiController) SdlInputHandler::SdlInputHandler(bool multiController)
: m_MultiController(multiController) : m_LastMouseMotionTime(0),
m_MultiController(multiController)
{ {
// Allow gamepad input when the app doesn't have focus // Allow gamepad input when the app doesn't have focus
SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1"); SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
@ -391,11 +392,19 @@ void SdlInputHandler::handleMouseMotionEvent(SDL_MouseMotionEvent* event)
short xdelta = (short)event->xrel; short xdelta = (short)event->xrel;
short ydelta = (short)event->yrel; short ydelta = (short)event->yrel;
// Delay for 1 ms to allow batching of mouse move // If we're sending more than one motion event per millisecond,
// events from high DPI mice. // delay for 1 ms to allow batching of mouse move events.
SDL_Delay(1); Uint32 currentTime = SDL_GetTicks();
if (!SDL_TICKS_PASSED(currentTime, m_LastMouseMotionTime + 1)) {
SDL_Delay(1);
currentTime = SDL_GetTicks();
}
m_LastMouseMotionTime = currentTime;
// Pump even if we didn't delay since we might get some extra events
SDL_PumpEvents(); SDL_PumpEvents();
// Batch all of the pending mouse motion events
SDL_Event nextEvent; SDL_Event nextEvent;
while (SDL_PeepEvents(&nextEvent, while (SDL_PeepEvents(&nextEvent,
1, 1,

1
app/streaming/input.hpp
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@ -44,6 +44,7 @@ private:
void sendGamepadState(GamepadState* state); void sendGamepadState(GamepadState* state);
Uint32 m_LastMouseMotionTime;
bool m_MultiController; bool m_MultiController;
int m_GamepadMask; int m_GamepadMask;
GamepadState m_GamepadState[MAX_GAMEPADS]; GamepadState m_GamepadState[MAX_GAMEPADS];