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authorDavid Robillard <d@drobilla.net>2020-03-15 14:33:12 +0100
committerDavid Robillard <d@drobilla.net>2020-03-15 14:33:12 +0100
commit4693e9ac0b6792e8a6d2af2e46499158bf6b2509 (patch)
tree5ece79e5bce91e497d82e270456ed512f7369e14
parent390f756a37af8f5a2336e43edff8ef345a39743e (diff)
X11: Read from server if necessary in puglDispatchEvents()
This reduces input lag. The previous approach was an over-optimization: what's important here is to keep the iteration bounded by not continually flushing, but we do want to read everything to be as up to date as possible.
-rw-r--r--pugl/detail/x11.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/pugl/detail/x11.c b/pugl/detail/x11.c
index 7b83b38..4747f64 100644
--- a/pugl/detail/x11.c
+++ b/pugl/detail/x11.c
@@ -744,14 +744,14 @@ puglDispatchEvents(PuglWorld* world)
{
const PuglX11Atoms* const atoms = &world->impl->atoms;
- // Flush just once at the start to fill event queue
+ // Flush output to the server once at the start
Display* display = world->impl->display;
XFlush(display);
world->impl->dispatchingEvents = true;
- // Process all queued events (locally, without flushing or reading)
- while (XEventsQueued(display, QueuedAlready) > 0) {
+ // Process all queued events (without further flushing)
+ while (XEventsQueued(display, QueuedAfterReading) > 0) {
XEvent xevent;
XNextEvent(display, &xevent);