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cursor: rate-limit resize events respecting monitor's refresh rate

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This fixes the lag when resizing windows of some apps on XWayland
(e.g. Chromium and Steam).
This commit is contained in:
tokyo4j 2024-05-31 15:10:39 +09:00 • committed by Consolatis
parent 2388f37cc7
commit 4073a6b923
1 changed files with 22 additions and 0 deletions
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22
src/input/cursor.c
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@ -248,6 +248,28 @@ process_cursor_move(struct server *server, uint32_t time)
static void
process_cursor_resize(struct server *server, uint32_t time)
{
/* Rate-limit resize events respecting monitor refresh rate */
static uint32_t last_resize_time = 0;
static struct view *last_resize_view = NULL;
if (server->grabbed_view == last_resize_view) {
int32_t refresh = 0;
if (output_is_usable(last_resize_view->output)) {
refresh = last_resize_view->output->wlr_output->refresh;
}
/* Limit to 250Hz if refresh rate is not available */
if (refresh <= 0) {
refresh = 250000;
}
/* Not caring overflow, but it won't be observable */
if (time - last_resize_time < 1000000 / (uint32_t)refresh) {
return;
}
}
last_resize_time = time;
last_resize_view = server->grabbed_view;
double dx = server->seat.cursor->x - server->grab_x;
double dy = server->seat.cursor->y - server->grab_y;